Difference between revisions of "ATM 33.50 (Exhaust Gas Temperature Model)"

Revision as of 02:55, 12 September 2011

Refer to the funktionsrahmen for the following diagrams:

atm-main

atm-atm-b1 Exhaust gas temperature model (cylinder bank 1) overview

atm-tmp-stat TMP_STAT engine speed & relative cylinder charge map and corrected for temperature for acceleration, intake air temp., catalyst heating, catalyst warming, ignition angle, lambda and cold engine

atm-dynamik Temperature dynamic for exhaust gas and catalytic converter temperature (in and near the catalytic converter)

atm-tabgm Temperature dynamic: exhaust gas, exhaust pipe wall effect, from the exhaust gas temperature tabgm

atm-tkatm Temperature dynamic for the temperature near the catalytic converter

atm-exotherme Exothermic temperature increase near the catalyst from measurement sites tabgm to tikatm

atm-tikatm Temperature dynamic for the temperature in the catalytic converter

atm-exoikat Exothermic temperature increase in the catalyst from measurement sites tabgm to tikatm

atm-kr-stat Exhaust gas temperature in the exhaust manifold under steady-state conditions

atm-kr-dyn Exhaust gas temperature in the exhaust manifold under dynamic conditions

atm-tmp-start Calculation of the exhaust gas or exhaust pipe wall temperature at engine start

atm-tpe-logik Calculation of the dew point at the pre-cat and post-cat lambda probes

atm-sp-nachl Storage of the dew point conditions at engine switch off

atm-mean Calculation of etazwist average values

atm-tmp-umgm If no ambient temperature sensor is available, calculate a substitute from ambient temperature (tans)

atm-mst If tabst_w is not correct tabstatm = maximum value, request for delay B_nlatm as a function of engine speed and tatu-threshold)

ATM 33.50 (Exhaust Gas Temperature Model) Function Description

The simulated exhaust gas temperatures tabgm and tabgkrm (for SY_TURBO = 1) and catalytic converter temperatures tkatm and tikatm are used for the following purposes:

1. Monitoring the catalyst. If the catalytic converter falls below its starting temperature, then a fault can be detected.

2. For lambda control on the probe after the catalytic converter. This control is only activated after engine start, when the catalyst has exceeded its start-up temperature.

3. For the probe heater control after engine start. If the simulated dew point is exceeded, the probe heater is turned on.

4. Monitoring the heated exhaust gas oxygen (HEGO) sensor (i.e. lambda probe) heating system. If the exhaust gas temperature exceeds 800°C for example, then the lambda probe heater will be switched off, so that the probe is not too hot.

5. For fan motor control.

6. For switching on component protection.

This function provides only a rough approximation of the exhaust gas and catalytic converter temperature profiles, whereas throughout the application especially the four monitoring areas (dew point profiles in the exhaust gas, catalytic converter monitoring, enabling and shutting off lambda probe heating and high temperatures for component protection) should be considered to be critical.

1. Basic function

Steady-state temperature (tatmsta): the same applies for takrstc

With the engine speed/relative cylinder charge map KFTATM the steady-state exhaust gas temperature before the catalyst is set. This temperature is corrected for ambient temperature or simulated ambient temperature from the characteristic ATMTANS:

during boost with the constant TATMSA,

during catalyst heating with the constant TATMKH; catalyst warming with the constant TATMKW

with the ignition-angle efficiency map KFATMZW temperature as a function of ML and ETAZWIST

with the desired lambda map KFATMLA temperature as a function of ML and LAMSBG_W

for a cold engine block (TMOT - TATMTMOT) with TATMTMOT = 90°C.

The catalyst temperature (exothermic) is corrected for:

Temperature increase with the characteristic KATMEXML or KATMIEXML as a function of air mass

Temperature reduction with KLATMZWE or KLATMIZWE as a function of etazwimt (ignition angle influence)

Lambda influence with KLATMLAE or KLATMILAE as a function of lambsbg_w

Temperature set at TKATMOE or TIKATMOE at tabgm <TABGMEX or B_sa = 1

Different temperature increases are applied for the temperature in the catalytic converter tikatm and the temperature after the catalytic converter tkatm due to exothermic reaction and cooling and different ignition angles and lambda-corrections.

The time-based influence of the exhaust gas temperature before the catalytic converter:

Using a PT1 filter (filter time constant ZATMAML) the dynamics of the exhaust gas temperature are simulated and with a PT1 filter (time constant ZATMRML) the dynamics of the inlet manifold wall temperature are simulated.

The exhaust gas temperature and inlet manifold wall temperature are weighted by the division factor FATMRML.

The catalytic converter temperature tkatm is calculated from the exhaust gas temperature tabgm along with the PT1 filter (filter time constant ZATMKML).

The temperature in the catalyst tikatm is modelled from the exhaust gas temperature tabgm via three filters (time constant ZATMIKML) using the heat transfer principle. Due to a thrust caused by the small air mass flow in the catalytic converter, there is a possible exhaust gas temperature increase due to the greater influence on the matrix temperature by the exhaust gas throughput. This thrust-based temperature increase can be modelled by the positive B_sa side with a temperature, which is composed of the catalyst temperature tikatm and an offset TATMSAE, will be initialised. The time constants of the PT1-filter ZATMIKML are represented by air-mass-dependent characteristic curves.

The initial values for the exhaust and catalyst temperature at engine start can be calculated from the temperatures at switch-off and delay times. The starting values for the exhaust gas and catalyst temperatures should approximate to the manifold wall temperatures at the probe insertion points a few minutes after switch-off. The filter for the exhaust gas temperature is stopped by setting B_stend = 0. The filter for the manifold wall temperature is stopped when B_atmtpa = 1. The filter for the catalyst temperature will be enabled only when B_atmtpk = 1.

2. Dew Point Detection

Initial values for the exhaust gas temperature tabgmst and catalyst temperature tkatmst

When stopping the engine (C_nachl 0 ® 1) the temperatures tabgm and tkatm are stored.

When starting the engine, the initial temperatures tabgmst and tkatmst are calculated from the switch-off temperature (corrected for ambient temperature) and a factor obtained from maps KFATMABKA or KFATMABKK as a function of tabstatm and tatu.

During power fail the switch-off temperature will be determined from the constant TATMSTI.

For test condition (B_faatm = 1), the initial temperatures are given by the constants TASTBFA and TKSTBFA.

Integrated Heat Quantity iwmatm_w

The dew point end time is approximately proportional to the heat quantity after engine start. The heat quantity = Integral (temp. ´ air mass ´ C_p) is calculated from the steady-state exhaust gas temperature tatmsta plus TATMWMK multiplied by the air mass. The result of the integration multiplied by the heat capacity at constant pressure C_p (approximately 1 kJ/kgK) gives the heat quantity.

Dew point end for the pre-cat lambda probe B_atmtpa and post-cat lambda probe B_atmtpk

The calculated exhaust gas temperature at engine start tabgmst approximates to the exhaust pipe wall temperature. If the exhaust pipe wall temperature is greater than 60°C for example then no condensation occurs. The values in the map KFWMABG for these temperatures are less than 14 kJ, so the dew point end is detected immediately, or after only a few seconds.

For catalytic converter heating with thermal reaction (B_trkh = 1) the values in maps KFWMABG or KFWMKAT are multiplied by the factor WMKATKH or WMABGKH respectively. Thus, the dew point end-times are very short for this mode of operation.

Repeated starts (extension of the dew point-end-times)

If the engine had not reached the dew point end (B_atmtpa = 0 and B_atmtpf = 0) then when the engine restarts, the counter zwmatmf is increased by 1. After several periods of very short engine running (e.g. 3), the counter zwmatmf value would be set equal to 3. With a constant FWMABGW = 0.25 for example, the values in the map KFWMABG increase by a factor equal to (zwmatmf x KFWMABG + 1) = 1.75. When the engine starts, the dew point end time from the last engine run is detected and the counter zwmatmf is reset.

Storage of the dew point end condition in the delay

For the determination of repeat start dew point end the conditions B_atmtpa in the flag B_atmtpf and B_atmtpk in the flag B_atmtpl are saved at engine switch-off due to a regular switch-off using the ignition or stall (B_stndnl). The function of dew point end for the post-cat lambda probe B_atmtpk is analogous to the function for B_atmtpa.

3. Calculation of a simulated ambient temperature from the intake air temperature (tans) if no ambient temperature sensor is available.

The simulated temperature tatu will be used for calculating the temperature correction via the characteristic ATMTANS and for determining the starting temperatures tabgmst and tkatmst. The intake air temperature (tans) is corrected with the constant DTUMTAT and under certain conditions stored in continuous RAM. If for example at engine start, the temperature tatu > tans, then the temperature value tatu is set on the lower tans value.

With the constant TATMWMK (negative value) the difference in dew point end between catalyst heating and no catalyst heating can be increased.

When catalytic converter heating is active B_khtr = 1 and the bit B_atmtpa can be set equal to 1 immediately after engine start. This is possible only when no problematic condensation is formed during catalyst heating.

With the system constants SY_STERVK = 1 cylinder bank 2 can be applied separately for stereo systems.

For SY_TURBO = 1 the exhaust gas temperature tabgm is essentially identical in addition to the modeled temperature in the manifold tabgkrm.

ATM 33.50 Application Notes

1. Installation locations for temperature sensors in this application, running in the direction of flow:

- In probe installation position before catalytic converter-

1. Exhaust gas temperature (pipe centre) for the high temperatures at high loads for probe heater switch off

2. Manifold wall temperature for the determination of the dew-end times. (Condensation protection)

- Before the catalytic converter

3. Exhaust gas temperature (pipe centre) for the catalyst start-up temperature

- In the catalytic converter

4. Ceramic temperature in and after catalytic converter (in the last third of the catalytic converter or behind the adjoining matrix) to determine the air-mass-dependent time constants.

- After the catalytic converter

5. Pipe wall temperature at probe installation site for the determination of the dew-end times (condensation protection).

Temperature measuring point 3 can be omitted if the distance from probe to catalytic converter is smaller than about 30 cm. The temperature drop from probe installation site to catalytic converter can then be neglected.

For the application of the functional data the modelled temperatures will always be compared with the measured temperatures and the functional data amended until a sufficiently high accuracy is achieved. In so doing, it will be the actual catalyst temperature, the temperature increase due to the exothermic reaction is not considered in the model.

2. Map KFTATM

For the determination of the steady-state temperature for example, before the catalytic converter the temperature corrections should not function. The cooling capacity of the wind on the dynamometer or on the measuring wheel can be simulated only very roughly at the higher engine load range. The map values can be determined on the rolling road dynamometer, but should be corrected on an appropriate test drive.

3. Temperature Corrections

- TATMSA

Boost can cause low exhaust temperatures that fall below the starting temperature of the catalyst. The longer the time period for the thrust condition, the lower the exhaust and catalyst temperatures. For catalyst diagnosis during boost, the exhaust gas temperature model is more likely to calculate a lower value than the measured temperature.

- ATMTANS

At low ambient temperatures, exhaust gas temperature can fall below the catalyst start-up temperature. Therefore, the model temperature is only corrected at the low temperature range.

- TATMKH

As long as the catalyst-heating measures are effective, higher exhaust temperatures will result.

- TATMKW

The catalyst operating temperature will not be not reached during prolonged idling, so the exhaust gas temperature can be raised by the catalyst warming function.

- KFATMZW

The temperature increase as a result of ignition angle retardation can be determined on a rolling road dynamometer. First, on the dynamometer, the characteristic field values KFTATM are applied without ignition angle correction. Ignition angles are then modified so that allowed etazwist values will result in the map. Through the corresponding air mass, the temperature increase will then be displayed in the map KFATMZW.

- KFATMLA

The exhaust temperature is reduced by enrichment. The application is similar to KFATMZW, except that the ignition angle efficiency is changed instead of the enrichment factor.

- TATMTMOT

The map KFTATM is applied with a warm engine. Thus, the model exhaust gas temperature has smaller deviations during cold start. For this operating mode, the temperature is corrected with the difference of the cold engine temperature and the warm engine temperature.

TATMTMOT should be about 90 to 100°C.

4. Maps ZATMAML, ZATMRML, FATMRML, ZATMKML, ZATMKKML, ZATMIKML und ZATMIKKML

The air-mass-dependent time constants ZATMAML, ZATMRML (temperature measuring points 1 or 3), and ZATMKML, ZATMKKML, ZATMIKML, ZATMIKKML (temperature measuring point 4), can help to more accurately determine “spikes in the air mass” during sudden load variations. Thereby "air mass jumps" at full load and in particular during boost can be avoided. For example, for an air mass jump from 30 kg/hr to 80 kg/hr, the measured time constant is applied to the air mass flow of 80 kg/hr. For large air mass jumps during idle, the time constants ZATMKKML and ZATMIKKML can be input instead of ZATMKML or ZATMIKML if required.

5. Block EXOTHERME:

- KATMEXML

The exothermic temperature is a function of air mass flow (warming by realizing emissions, reducing warming via a larger air mass). First KATMEXML applies, then KLATMZWE, KLATMLAE.

- KLATMZWE

When ignition angle retardation increases the temperature before the catalyst, the catalyst temperature drops.

- KLATMLAE

For lambda < 1 (richer), the air mass is lacking to improve emissions so the catalyst temperature decreases.

- TABGMEX

If the temperature before the catalyst tabgm < TABGMEX (catalyst switch-off temperature) then the temperature correction = TKATMOE.

- TKATMOE

Temperature correction during boost or through tabgm> TABGMEX

- TATMSAE

Temperature increase in the boost in the catalyst in terms of tkatm

Block EXOIKAT:

- KATMIEXML, KLATMIZWE, KLATMILAE, TIKATMOE

Application depends on the application for Block EXOTHERME

- TATMSAE

Temperature increase in the thrust in the catalyst in terms of tikatm

6. Dew point end times for exhaust gas temperatures vary greatly between the centre of the exhaust pipe and the pipe wall. Dew point end times for the tube wall temperatures before the catalyst (temperature measuring points 2) or after the catalyst (temperature measuring points 5) should be used. These times are usually due to delaying control readiness for too long, in which case the temperature gradients at the probe mounting location must be examined more closely. To avoid probe damage by “water hammer”, the sensor heater must be fully turned on until the dew point temperature is exceeded or the dew point end time is detected thus condensation will no longer occur.

When the switch-off time in the ECU delay is calculated, then the switch-off time tabst_w after ECU delay will be incorrect. At engine start after ECU delay, the switch-off time tabstatm therefore, will be set to the maximum value of 65,535 (i.e. 2¹⁶-1). The ECU delay requirement for the time TNLATM when engine speed > TNLATMTM & tumg (tatu) > TNLATMTU.

8. For blocks KR_STAT and KR_DYN as appropriate, the descriptions in points 3 and 4 shall apply.

Typical Values:

KFTATM: x: engine speed/RPM, y: relative cylinder charge/%, z: temperature/°C

	800	1200	1800	2400	3000	4000	5000	6000
15	380	400	420	450	480	520	550	580
22	400	420	450	480	520	550	580	610
30	420	450	480	520	550	580	610	650
50	450	480	520	550	580	610	650	700
70	470	520	550	580	610	660	700	750
100	490	550	580	610	650	700	750	790
120	510	560	610	650	700	750	790	840
140	530	580	650	700	750	790	840	900

KFATMZW: x: temperature/°C, y: ml_w/kg/hr, z: etazwimt

20

40

80

150

250

400

1.00

0.0

0.95

15

40

50

60

70

75

0.90

15

60

80

100

125

140

0.80

20

80

120

150

180

200

0.70

25

100

150

190

210

220

0.60

30

115

175

210

230

245

KFATMLA: x: temperature/°C, y: ml_w/kg/hr, z: lamsbg_w

20

40

80

150

250

400

1.15

5

10

30

50

60

70

1.00

0.0

0.95

5

10

20

30

40

45

0.90

15

25

40

50

60

75

0.80

30

40

60

70

85

100

0.70

40

60

80

90

100

120

KFWMABG: x: energy/kJ, y: tabgmst/°C, z: tmst/°C

-40

0

15

25

30

55

60

-40

200

160

150

140

100

60

30

0

180

150

120

110

80

50

20

15

160

140

60

55

30

40

0.45

25

140

120

30

15

10

0.45

60

120

30

20

15

10

5

0.45

KFWMKAT values correspond to KFWMABG ´ 5

In the heat quantity maps KFWMABG and KFWMKAT a value of 0.0 is never required! It should always have at least the value to be entered; the 2 sec corresponds to idle after cold start. Only then does the repeat-start counter operate after several starts where the dew point was not reached.

ZATMAML ml_w/kg/hr, Time constant/sec 10, 30 ; 20, 20 ; 40, 13 ; 80, 5 ; 180, 4 ; 400, 3 ; 600, 2 ;

ZATMKML ml_w/kg/hr, Time constant/sec 10, 150 ; 20, 60 ; 40, 35 ; 80, 20 ; 180, 10 ; 400, 7 ; 600, 4 ;

ZATMIKML value represents approximately ZATMKML ´ 0.3

ZATMKKML for neutral input, the data must correlate to ZATMKML

ZATMIKKML for neutral input, the data must correlate to ZATMIKML

ZATMRML ml_w/kg/hr, Time constant/sec 10, 300 ; 20, 80 ; 40, 55 ; 80, 30 ; 180, 20 ; 400, 10 ; 600, 7 ;

FATMRML ml_w/kg/hr, Time constant/sec 10, 0.5 ; 20, 0.6 ; 40, 0.7 ; 80, 0.8 ; 180, 0.95

400,0.95 ; 600, 0.96;

KATMEXML ml_w/kg/hr, Time constant/sec 10, 0 ; 20, 0 ; 40, 0 ; 80, 0 ; 180, 0 ; 400, 0 ;

KLATMZWE etazwimt, Factor 1, 0 ; 0.95, 0 ; 0.9, 0 ; 0.8, 0 ; 0.7, 0 ; 0.6, 0 ;

KLATMLAE lamsbg_w, Factor 1.15, 0 ; 1 , 0 ;0.95, 0 ; 0.9, 0 ; 0.8, 0 ; 0.7, 0 ;

TATMTP: 52°C

TKATMOE: 0°C

TATMSAE: 0°C

KATMIEXML ml_w/kg/hr, Time constant/sec 10, 0 ; 20, 0 ; 40, 0 ; 80, 0 ; 180, 0 ; 400, 0 ;

KLATMIZWE etazwimt, Factor 1, 0 ; 0.95, 0 ; 0.9, 0

0.8, 0 ; 0.7, 0 ; 0.6, 0 ;

KLATMILAE lamsbg_w, Factor 1.15, 0 ; 1 , 0 ;0.95, 0 ; 0.9, 0 ; 0.8, 0 ; 0.7, 0 ;

TIKATMOE: 0°C

KFATMABKA: x: tatu/°C, y: tabstatm_w/seconds, z: no units

10

50

180

360

600

1000

-40

0.95

0.70

0.50

0.30

0.15

0.00

-15

0.95

0.70

0.50

0.30

0.15

0.00

0

0.95

0.70

0.50

0.30

0.15

0.00

15

0.95

0.70

0.50

0.30

0.15

0.00

40

0.95

0.70

0.50

0.30

0.15

0.00

KFATMABKK: x: tatu/°C, y: tabstatm_w [s], z: no units

10

50

180

360

600

1000

-40

0.90

0.60

0.40

0.25

0.15

0.00

-15

0.90

0.60

0.40

0.25

0.15

0.00

0

0.90

0.60

0.40

0.25

0.15

0.00

15

0.90

0.60

0.40

0.25

0.15

0.00

40

0.90

0.60

0.40

0.25

0.15

0.00

ATMTANS tatu/°C, Temp./°C -40, 60 ; -10, 20 ; 20, 0 ;

TATMSA: 100°C

TATMKH: 80°C

TATMTRKH: 200°C

TATMKW: 100°C

TATMTMOT: 90°C

TATMSTI: 20°C

TASTBFA: 40°C

TKSTBFA: 40°C

TATMWMK: -80°C

WMABGKH: Factor of 1.0

WMKATKH Factor of 1.0

FWMABGW Factor of 0.25

FWMKATW Factor of 0.25

DTUMTAT: 20°C

VTUMTAT: 40 km/h

NTUMTAT: 1800 rpm

IMTUMTAT: 1 kg

TUMTAIT: 20°C

TNLATMTM: 80°C

TNLATMTU: 5°C

TNLATM: 660 seconds

Only when SY_TURBO = 1:

For neutral input (tabgkrm_w = tabgm_w)

KFATMKR = KFTATM

KFATZWK = KFATMZW

KFATLAK = KFATMLA

TATMKRSA = TATMSA

ZATRKRML = ZATMRML

ZATAKRML = ZATMAML

FATRKRML = FATMRML

ATMTANS tans/°C, Temp./°C -40, 40 ; -20, 25 ; 0, 12 ; 20, 0 ; 60, -30

The functional data for cylinder bank 2 correspond to the functional data from cylinder bank 1 Note:

In order that ATM 22:20 for the application is backward compatible the default values should be entered thus: KATMEXML, KLATMZWE, KLATMLAE, TKATMOE = 0 and TABGMEX = 1220°C.

In order that ATM 33.10 remains application-neutral with ATM 22.50, TATMTRKH must be set equal to TATMKH and WMKATKH should be set equal to 1. Tikatm is not used in a function because the input can be used in the path in the exhaust gas temperature model without impact on safety, however, the default values for KATMIEXML, KLATMIZWE, KLATMILAE and TIKATMOE should be set equal to 0 and TABGMEX = 1220°C.

In DKATSP areas TMINKATS and TMAXKATS, a high accuracy is required for tikatm!

Parameter	Description
ATMTAKR	Correction for the manifold temperature
ATMTANS	Temperature correction for the exhaust gas temperature model
DTUMTAT	Offset: intake air temperature ® ambient temperature
FATMRML	Factor for the difference between exhaust gas & exhaust pipe wall temperature
FATMRML2	Factor for the difference between exhaust gas & exhaust pipe wall temperature, cylinder bank 2
FATRKRML	Factor for the difference between exhaust gas & wall temperature in the manifold
FATRKRML2	Factor for the difference between exhaust gas & wall temperature in the manifold, cylinder bank 2
FWMABGW	Factor for heat quantity during repeated starts for pre-cat exhaust gas dew points
FWMABGW2	Factor for heat quantity during repeated starts for pre-cat exhaust gas dew points, cylinder bank 2
FWMKATW	Factor for heat quantities during repeated starts for dew points after main catalyst
FWMKATW2	Factor for heat quantities during repeated starts for dew points after main catalyst, cylinder bank 2
IMTUMTAT	Integration threshold air mass for determining ambient temperature from TANS
KATMEXML	Exothermic reaction temperature in catalyst, tkatm
KATMEXML2	Exothermic reaction temperature in catalyst, cylinder bank 2
KATMIEXML	Exothermic reaction temperature in catalyst, tikatm
KATMIEXML2	Exothermic reaction temperature in catalyst, tikatm, cylinder bank 2
KFATLAK	Map for lambda correction for manifold exhaust gas temperature
KFATLAK2	Map for lambda correction for manifold exhaust gas temperature, cylinder bank 2
KFATMABKA	Factor for exhaust gas temperature decrease as a function of stop time and ambient temperature
KFATMABKA2	Factor for exhaust gas temperature decrease as a function of stop time and ambient temperature, cylinder bank 2
KFATMABKK	Factor for reducing the catalyst temperature as a function of stop time and ambient temperature
KFATMABKK2	Factor for reducing the catalyst temperature as a function of stop time and ambient temperature, cylinder bank 2
KFATMKR	Map for steady-state manifold exhaust gas temperature as a function of engine speed and relative cylinder charge
KFATMKR2	Map for steady-state manifold exhaust gas temperature, cylinder bank 2
KFATMLA	Map for exhaust gas temperature correction as a function of lambda
KFATMLA2	Map for exhaust gas temperature correction as a function of lambda, cylinder bank 2
KFATMZW	Map for exhaust gas temperature correction as a function of igntion angle correction
KFATMZW2	Map for exhaust gas temperature correction as a function of ignition angle, cylinder bank 2
KFATZWK	Map for ignition angle correction for manifold gas temperature
KFATZWK2	Map for ignition angle correction for manifold gas temperature, cylinder bank 2
KFTATM	Map for exhaust gas temperature as a function of engine speed and relative cylinder charge
KFTATM2	Map for exhaust gas temperature as a function of engine speed and relative cylinder charge for cylinder bank 2
KFWMABG	Map for heat quantity threshold exhaust gas dew points
KFWMABG2	Map for heat quantity threshold exhaust gas dew points, cylinder bank 2
KFWMKAT	Map for heat quantity threshold dew points after catalyst
KFWMKAT2	Map for heat quantity threshold dew points after catalyst, cylinder bank 2
KLATMILAE	Exothermic temperature decrease through enrichment, tikatm
KLATMILAE2	Exothermic temperature decrease through enrichment, tikatm, Bank 2
KLATMIZWE	Exothermic temperature decrease in catalyst at later ignition angles, tikatm
KLATMIZWE2	Exothermic temperature decrease in catalyst at later ignition angles, tikatm, Bank 2
KLATMLAE	Exothermic temperature decrease through enrichment
KLATMLAE2	Exothermic temperature decrease through enrichment, cylinder bank 2
KLATMZWE	Exothermic temperature decrease in catalyst at later ignition angles, tkatm
KLATMZWE2	Exothermic temperature decrease in catalyst at later ignition angles, cylinder bank 2
NTUMTAT	Speed threshold for determining ambient temperature from TANS
SEZ06TMUB	Sample point distribution, ignition angle efficiency
SLX06TMUW	Sample point distribution, desired lambda
SLY06TMUW	Sample point distribution, desired lambda, cylinder bank 2
SML06TMUW	Sample point distribution, air mass, 6 sample points
SML07TMUW	Sample point distribution, air mass, 7 sample points
SMT06TMUW	Sample point distribution, air mass, 6 sample points
ST107TMUB	Sample point distribution, start temperature at front probe
ST207TMUB	Sample point distribution, start temperature at front probe, cylinder bank 2
ST307TMUB	Sample point distribution, start temperature at rear probe
ST407TMUB	Sample point distribution, start temperature at rear probe, cylinder bank 2
STM05TMUB	Sample point distribution, engine start temperature
STS06TMUW	Sample point distribution, exhaust gas mass flow
STU05TMUB	Sample point distribution, simulated ambient temperature
SY_STERVK	System constant condition: stereo before catalyst
SY_TURBO	System constant: turbocharger
TABGMEX	Exhaust gas temperature below the catalyst switch-off temperature
TASTBFA	Model temperature before pre-cat initial value via B_faatm requirement
TATMKH	Exhaust gas temperature correction via catalyst heating active
TATMKH2	Exhaust gas temperature correction via catalyst heating active, cylinder bank 2
TATMKRSA	Exhaust gas temperature correction in manifold via boost switch-off
TATMKW	Exhaust gas temperature correction with catalyst warming active
TATMSA	Exhaust gas temperature correction via boost cut-off
TATMSAE	Exothermic temperature increase in boost
TATMSAE2	Exothermic temperature increase in boost, cylinder bank 2
TATMSTI	Initial value for tabgm, tkatm intial value through power fail
TATMTMOT	Engine temperature warmer Motor, for temperature correction during cold start conditions
TATMTP	Exhaust gas dew point temperature
TATMTRKH	Exhaust gas temperature correction via thermal reaction catalyst heating
TATMTRKH2	Exhaust gas temperature correction via thermal reaction catalyst heating, cylinder bank 2
TATMWMK	Temperature offset for calculating heat quantities
TIKATMOE	Temperature correction in catalyst without exothermic reaction, tikatm
TKATMOE	Temperature correction near catalyst without exothermic reaction, tkatm
TKSTBFA	Model temperature post-cat initial value via B_faatm requirement
TNLATM	Minimum ECU delay time for exhaust gas temperature model – Abstellzeit
TNLATMTM	When tmot > threshold ECU delay requirement B_nlatm = 1
TNLATMTU	When tumg (tatu – ATM) > threshold ECU delay requirement
TUMTAIT	Initialising value for ambient temperature from TANS
VTUMTAT	Vehicle speed threshold for TANS ® ambient temperature
WMABGKH	Factor for heat quantity correction via catalyst heating for dew points
WMABGKH2	Factor for heat quantity correction via catalyst heating for dew points, cylinder bank 2
WMKATKH	Factor for heat quantity correction via catalyst heating for dew points after catalyst
WMKATKH2	Factor for heat quantity correction via catalyst heating for dew points after catalyst, cylinder bank 2
ZATAKRML	Time constant for exhaust gas temperature model (manifold)
ZATAKRML2	Time constant for exhaust gas temperature model (manifold), cylinder bank 2
ZATMAML	Time constant for exhaust gas temperature model
ZATMAML2	Time constant for exhaust gas temperature model, cylinder bank 2
ZATMIKKML	Time constant for catalyst temperature model – Temperature in catalyst tikatm during cooling
ZATMIKKML2	Time constant for catalyst temperature model – Temperature in catalyst tikatm during cooling, bank 2
ZATMIKML	Time constant for catalyst temperature model – Temperature in catalyst, tikatm
ZATMIKML2	Time constant for catalyst temperature model – Temperature in catalyst, cylinder bank 2
ZATMKKML	Time constant for catalyst temperature model – catalyst temperature tkatm during cooling
ZATMKKML2	Time constant for catalyst temperature model – catalyst temperature tkatm during cooling, bank 2
ZATMKML	Time constant for catalyst temperature model – catalyst temperature tkatm
ZATMKML2	Time constant for catalyst temperature model – catalyst temperature, cylinder bank 2
ZATMRML	Time constant for exhaust gas temperature model – exhaust pipe wall temperature
ZATMRML2	Time constant for exhaust gas temperature model – exhaust pipe wall temperature Bank 2
ZATRKRML	Time constant for exhaust gas temperature model – manifold wall temperature
ZATRKRML2	Time constant for exhaust gas temperature model – manifold wall temperature, cylinder bank 2
Variable	Description
B_ATMLL	Condition for time constant during cooling at idle
B_ATMLL2	Condition for time constant during cooling at idle
B_ATMST	Condition for tabgmst, tkatmst initial value calculation
B_ATMST2	Condition for tabgmst, tkatmst calculation, cylinder bank 2
B_ATMTPA	Condition: dew point before catalyst exceeded
B_ATMTPA2	Condition: dew point 2 before catalyst exceeded
B_ATMTPF	Condition: dew point before catalyst exceeded (last trip)
B_ATMTPF2	Condition: dew point before catalyst exceeded (last trip) cylinder bank 2
B_ATMTPK	Condition: dew point after catalyst exceeded
B_ATMTPK2	Condition: dew point 2 after catalyst exceeded
B_ATMTPL	Condition: dew point after catalyst exceeded (last trip)
B_ATMTPL2	Condition: dew point after catalyst exceeded (last trip) cylinder bank 2
B_FAATM	Condition: functional requirements for dew point end times
B_KH	Condition: catalyst heating
B_KW	Condition: catalyst warming
B_LL	Condition: idle
B_NACHL	Condition: ECU delay
B_NACHLEND	Condition: ECU delay ended
B_NLATM	Condition: ECU delay exhaust gas temperature model probe protection
B_PWF	Condition: Power fail
B_SA	Condition: Overrun cut-off
B_ST	Condition: Start
B_STEND	Condition: End of start conditions achieved
B_STNDNL	Condition: Beginning of ECU delay or end of start conditions (1 ® 0)
B_TFU	Condition: Ambient temperature sensor available
B_TRKH	Condition: Catalyst heating, thermal reaction effective
B_UHRRMIN	Condition: timer with a relative number of minutes
B_UHRRSEC	Condition: timer with a relative number of minutes
DFP_TA	ECU internal error path number: intake air temperature TANS (charge air)
DFP_TUM	ECU Internal error path number: ambient temperature
ETAZWIMT	Actual ignition angle efficiency average for exhaust gas temperature model (200 ms)
ETAZWIST	Actual ignition angle efficiency
E_TA	Error flag: TANS
E_TUM	Error flag: ambient temperature tumg
IMLATM	Integral of air mass flows from engine start bis Max.wert
IMLATM_W	Integral of air mass flows from end of start conditions up to the maximum value, (Word)
IWMATM2_W	Heat quantity for Condensation - dew points exhaust gas/catalyst (word), cylinder bank 2
IWMATM_W	Heat quantity for Condensation - dew points exhaust gas/catalyst (word)
LAMSBG2_W	Desired lambda limit (word), cylinder bank 2
LAMSBG_W	Desired lambda limit (word)
ML_W	Filtered air mass flow (word)
NMOT	Engine speed
RL	Relative cylinder charge
TABGKRM2_W	Exhaust gas temperature in manifold from the model, cylinder bank 2
TABGKRM_W	Exhaust gas temperature in manifold from the model
TABGM	Exhaust gas temperature before catalyst from the model
TABGM2	Exhaust gas temperature before catalyst from the model, cylinder bank 2
TABGM2_W	Exhaust gas temperature before catalyst from the model (word) cylinder bank 2
TABGMAB	Exhaust gas temperature during engine switch-off
TABGMAB2	Exhaust gas temperature during engine switch-off (model) cylinder bank 2
TABGMST	Exhaust gas temperature at engine start
TABGMST2	Exhaust gas temperature at engine start, cylinder bank 2
TABGM_W	Exhaust gas temperature before catalyst from the model (word)
TABSTATM_W	Stop time in ECU delay for exhaust gas temperature model
TABSTMX_W	Stop time maximum query for exhaust gas temperature model
TABST_W	Stop time
TAKRKF	Steady-state manifold exhaust gas temperature without correction
TAKRKF2	Steady-state manifold exhaust gas temperature without correction, cylinder bank 2
TAKRSTC	Steady-state exhaust gas temperature in manifold in °C
TAKRSTC2	Steady-state exhaust gas temperature in manifold, cylinder bank 2
TANS	Intake air temperature
TATAKRML	Output from PT1 element: exhaust gas temperature influence on tabgkrm
TATAKRML2	Output from PT1 element: exhaust gas temperature influence on tabgkrm, cylinder bank 2
TATMAML	Output from PT1 element: exhaust gas temperature influence on tabgm
TATMAML2	Output from PT1 element: exhaust gas temperature influence on tabgm, cylinder bank 2
TATMKF	Exhaust gas temperature before catalyst from map KFTATM
TATMKF2	Exhaust gas temperature before catalyst from map KFTATM, cylinder bank 2
TATMRML	Output from PT1 element: exhaust pipe wall temperature effect from tabgm
TATMRML2	Output from PT1 element: exhaust pipe wall temperature effect from tabgm, cylinder bank 2
TATMSTA	Exhaust gas temperature before catalyst from the steady-state model
TATMSTA2	Exhaust gas temperature before catalyst from the steady-state model, cylinder bank 2
TATRKRML	Output from PT1 element: exhaust pipe wall temperature effect from tabgkrm
TATRKRML2	Output from PT1 element: exhaust pipe wall temperature effect from tabgkrm, cylinder bank 2
TATU	Intake air temperature or ambient temperature
TEXOIKM2_W	Exotherme temperature increase in catalyst for tikatm, cylinder bank 2
TEXOIKM_W	Exotherme temperature increase in catalyst for tikatm
TEXOM2_W	Exotherme temperature increase in catalyst for tkatm2, cylinder bank 2
TEXOM_W	Exotherme temperature increase in catalyst for tkatm
TIKATM	Exhaust gas temperature in catalyst from the model
TIKATM2	Exhaust gas temperature in catalyst from the model, cylinder bank 2
TIKATM2_W	Exhaust gas temperature in catalyst from the model, cylinder bank 2
TIKATM W	Exhaust gas temperature in catalyst from the model
TKATM	Catalyst temperature from the model
TKATM2	Catalyst temperature from the model, cylinder bank 2
TKATM2_W	Catalyst temperature from the model (word), cylinder bank 2
TKATMAB	Exhaust gas temperature after catalyst through engine switch-off (model)
TKATMAB2	Exhaust gas temperature after catalyst through engine switch-off (model), cylinder bank 2
TKATMST	Catalyst temperature model initial value as a function of switch-off value, switch-off time
TKATMST2	Catalyst temperature model initial value as a function of switch-off value, switch-off time, bank 2
TKATM_W	Catalyst temperature from the model (word)
TMOT	Engine temperature
TMST	Engine start temperature
TUMG	Ambient temperature
VFZG	Vehicle speed
ZWMATM	Counter for repeated starts and factor for heat quantity threshold
ZWMATM2	Counter for repeated starts and factor for heat quantity threshold, cylinder bank 2
ZWMATMF	Counter for repeated starts and factor for heat quantity threshold upstream
ZWMATMF2	Counter for repeated starts and factor for heat quantity threshold upstream, cylinder bank 2

Difference between revisions of "ATM 33.50 (Exhaust Gas Temperature Model)"

From Nefmoto

Revision as of 02:55, 12 September 2011

Views

Personal tools

Navigation

Search

Toolbox

@@ Line 563: / Line 563: @@
-{| border="1}
+{| border="1"
 |-
 |
@@ Line 1,733: / Line 1,733: @@
-In
+In DKATSP areas TMINKATS and TMAXKATS, a high accuracy is required for tikatm!
-DKATSP areas TMINKATS and TMAXKATS, a high accuracy is required for tikatm!
 {| border="1"
 |-
 |
 Parameter
 |
 Description
 |-
 |
 ATMTAKR
 |
 Correction
 for the manifold temperature
 |-
 |
 ATMTANS
 |
 Temperature
 correction for the exhaust gas temperature model
 |-
 |
 DTUMTAT
 |
 Offset:
 intake air temperature ® ambient temperature
 |-
 |
 FATMRML
 |
 Factor
 for the difference between exhaust gas &amp; exhaust pipe wall temperature
 |-
 |
 FATMRML2
 |
 Factor
 for the difference between exhaust gas &amp; exhaust pipe wall temperature, cylinder
 bank 2
 |-
 |
 FATRKRML
 |
 Factor
 for the difference between exhaust gas &amp; wall temperature in the manifold
 |-
 |
 FATRKRML2
 |
 Factor
 for the difference between exhaust gas &amp; wall temperature in the manifold,
 cylinder bank 2
 |-
 |
 FWMABGW
 |
 Factor
 for heat quantity during repeated starts for pre-cat exhaust gas dew points
 |-
 |
 FWMABGW2
 |
 Factor
 for heat quantity during repeated starts for pre-cat exhaust gas dew points,
 cylinder bank 2
 |-
 |
 FWMKATW
 |
 Factor
 for heat quantities during repeated starts for dew points after main catalyst
 |-
 |
 FWMKATW2
 |
 Factor
 for heat quantities during repeated starts for dew points after main catalyst,
 cylinder bank 2
 |-
 |
 IMTUMTAT
 |
 Integration
 threshold air mass for determining ambient temperature from TANS
 |-
 |
 KATMEXML
 |
 Exothermic
 reaction temperature in catalyst, tkatm
 |-
 |
 KATMEXML2
 |
 Exothermic
 reaction temperature in catalyst, cylinder bank 2
 |-
 |
 KATMIEXML
 |
 Exothermic
 reaction temperature in catalyst, tikatm
 |-
 |
 KATMIEXML2
 |
 Exothermic
 reaction temperature in catalyst, tikatm, cylinder bank 2
 |-
 |
 KFATLAK
 |
 Map for
 lambda correction for manifold exhaust gas temperature
 |-
 |
 KFATLAK2
 |
 Map for
 lambda correction for manifold exhaust gas temperature, cylinder bank 2
 |-
 |
 KFATMABKA
 |
 Factor
 for exhaust gas temperature decrease as a function of stop time and ambient
 temperature
 |-
 |
 KFATMABKA2
 |
 Factor
 for exhaust gas temperature decrease as a function of stop time and ambient
 temperature, cylinder bank 2
 |-
 |
 KFATMABKK
 |
 Factor
 for reducing the catalyst temperature as a function of stop time and ambient
 temperature
 |-
 |
 KFATMABKK2
 |
 Factor
 for reducing the catalyst temperature as a function of stop time and ambient
 temperature, cylinder bank 2
 |-
 |
 KFATMKR
 |
 Map for
 steady-state manifold exhaust gas temperature as a function of engine speed
 and relative cylinder charge
 |-
 |
 KFATMKR2
 |
 Map for
 steady-state manifold exhaust gas temperature, cylinder bank 2
 |-
 |
 KFATMLA
 |
 Map for
 exhaust gas temperature correction as a function of lambda
 |-
 |
 KFATMLA2
 |
 Map for
 exhaust gas temperature correction as a function of lambda, cylinder bank 2
 |-
 |
 KFATMZW
 |
 Map for
 exhaust gas temperature correction as a function of igntion angle correction
 |-
 |
 KFATMZW2
 |
 Map for
 exhaust gas temperature correction as a function of ignition angle, cylinder
 bank 2
 |-
 |
 KFATZWK
 |
 Map for
 ignition angle correction for manifold gas temperature
 |-
 |
 KFATZWK2
 |
 Map for
 ignition angle correction for manifold gas temperature, cylinder bank 2
 |-
 |
 KFTATM
 |
 Map for
 exhaust gas temperature as a function of engine speed and relative cylinder
 charge
 |-
 |
 KFTATM2
 |
 Map for
 exhaust gas temperature as a function of engine speed and relative cylinder
 charge for cylinder bank 2
 |-
 |
 KFWMABG
 |
 Map for
 heat quantity threshold exhaust gas dew points
 |-
 |
 KFWMABG2
 |
 Map for
 heat quantity threshold exhaust gas dew points, cylinder bank 2
 |-
 |
 KFWMKAT
 |
 Map for
 heat quantity threshold dew points after catalyst
 |-
 |
 KFWMKAT2
 |
 Map for
 heat quantity threshold dew points after catalyst, cylinder bank 2
 |-
 |
 KLATMILAE
 |
 Exothermic
 temperature decrease through enrichment, tikatm
 |-
 |
 KLATMILAE2
 |
 Exothermic
 temperature decrease through enrichment, tikatm, Bank 2
 |-
 |
 KLATMIZWE
 |
 Exothermic
 temperature decrease in catalyst at later ignition angles, tikatm
 |-
 |
 KLATMIZWE2
 |
 Exothermic
 temperature decrease in catalyst at later ignition angles, tikatm, Bank 2
 |-
 |
 KLATMLAE
 |
 Exothermic
 temperature decrease through enrichment
 |-
 |
 KLATMLAE2
 |
 Exothermic
 temperature decrease through enrichment, cylinder bank 2
 |-
 |
 KLATMZWE
 |
 Exothermic
 temperature decrease in catalyst at later ignition angles, tkatm
 |-
 |
 KLATMZWE2
 |
 Exothermic
 temperature decrease in catalyst at later ignition angles, cylinder bank 2
 |-
 |
 NTUMTAT
 |
 Speed
 threshold for determining ambient temperature from TANS
 |-
 |
 SEZ06TMUB
 |
 Sample
 point distribution, ignition angle efficiency
 |-
 |
 SLX06TMUW
 |
 Sample
 point distribution, desired lambda
 |-
 |
 SLY06TMUW
 |
 Sample
 point distribution, desired lambda, cylinder bank 2
 |-
 |
 SML06TMUW
 |
 Sample
 point distribution, air mass, 6 sample points
 |-
 |
 SML07TMUW
 |
 Sample
 point distribution, air mass, 7 sample points
 |-
 |
 SMT06TMUW
 |
 Sample
 point distribution, air mass, 6 sample points
 |-
 |
 ST107TMUB
 |
 Sample
 point distribution, start temperature at front probe
 |-
 |
 ST207TMUB
 |
 Sample
 point distribution, start temperature at front probe, cylinder bank 2
 |-
 |
 ST307TMUB
 |
 Sample point
 distribution, start temperature at rear probe
 |-
 |
 ST407TMUB
 |
 Sample
 point distribution, start temperature at rear probe, cylinder bank 2
 |-
 |
 STM05TMUB
 |
 Sample
 point distribution, engine start temperature
 |-
 |
 STS06TMUW
 |
 Sample
 point distribution, exhaust gas mass flow
 |-
 |
 STU05TMUB
 |
 Sample
 point distribution, simulated ambient temperature
 |-
 |
 SY_STERVK
 |
 System
 constant condition: stereo before catalyst
 |-
 |
 SY_TURBO
 |
 System
 constant: turbocharger
 |-
 |
 TABGMEX
 |
 Exhaust
 gas temperature below the catalyst switch-off temperature
 |-
 |
 TASTBFA
 |
 Model temperature
 before pre-cat initial value via B_faatm requirement
 |-
 |
 TATMKH
 |
 Exhaust
 gas temperature correction via catalyst heating active
 |-
 |
 TATMKH2
 |
 Exhaust
 gas temperature correction via catalyst heating active, cylinder bank 2
 |-
 |
 TATMKRSA
 |
 Exhaust
 gas temperature correction in manifold via boost switch-off
 |-
 |
 TATMKW
 |
 Exhaust
 gas temperature correction with catalyst warming active
 |-
 |
 TATMSA
 |
 Exhaust
 gas temperature correction via boost cut-off
 |-
 |
 TATMSAE
 |
 Exothermic
 temperature increase in boost
 |-
 |
 TATMSAE2
 |
 Exothermic
 temperature increase in boost, cylinder bank 2
 |-
 |
 TATMSTI
 |
 Initial
 value for tabgm, tkatm intial value through power fail
 |-
 |
 TATMTMOT
 |
 Engine temperature
 warmer Motor, for temperature correction during cold start conditions
 |-
 |
 TATMTP
 |
 Exhaust
 gas dew point temperature
 |-
 |
 TATMTRKH
 |
 Exhaust
 gas temperature correction via thermal reaction catalyst heating
 |-
 |
 TATMTRKH2
 |
 Exhaust
 gas temperature correction via thermal reaction catalyst heating, cylinder bank
 |-
 |
 TATMWMK
 |
 Temperature
 offset for calculating heat quantities
 |-
 |
 TIKATMOE
 |
 Temperature
 correction in catalyst without exothermic reaction, tikatm
 |-
 |
 TKATMOE
 |
 Temperature
 correction near catalyst without exothermic reaction, tkatm
 |-
 |
 TKSTBFA
 |
 Model temperature
 post-cat initial value via B_faatm requirement
 |-
 |
 TNLATM
 |
 Minimum
 ECU delay time for exhaust gas temperature model – Abstellzeit
 |-
 |
 TNLATMTM
 |
 When
 tmot &gt; threshold ECU delay requirement B_nlatm = 1
 |-
 |
 TNLATMTU
 |
 When
 tumg (tatu – ATM) &gt; threshold ECU delay requirement
 |-
 |
 TUMTAIT
 |
 Initialising
 value for ambient temperature from TANS
 |-
 |
 VTUMTAT
 |
 Vehicle
 speed threshold for TANS ® ambient temperature
 |-
 |
 WMABGKH
 |
 Factor
 for heat quantity correction via catalyst heating for dew points
 |-
 |
 WMABGKH2
 |
 Factor
 for heat quantity correction via catalyst heating for dew points, cylinder bank
 |-
 |
 WMKATKH
 |
 Factor
 for heat quantity correction via catalyst heating for dew points after
 catalyst
 |-
 |
 WMKATKH2
 |
 Factor
 for heat quantity correction via catalyst heating for dew points after
 catalyst, cylinder bank 2
 |-
 |
 ZATAKRML
 |
 Time
 constant for exhaust gas temperature model (manifold)
 |-
 |
 ZATAKRML2
 |
 Time
 constant for exhaust gas temperature model (manifold), cylinder bank 2
 |-
 |
 ZATMAML
 |
 Time
 constant for exhaust gas temperature model
 |-
 |
 ZATMAML2
 |
 Time
 constant for exhaust gas temperature model, cylinder bank 2
 |-
 |
 ZATMIKKML
 |
 Time
 constant for catalyst temperature model – Temperature in catalyst tikatm during
 cooling
 |-
 |
 ZATMIKKML2
 |
 Time
 constant for catalyst temperature model – Temperature in catalyst tikatm
 during cooling, bank 2
 |-
 |
 ZATMIKML
 |
 Time
 constant for catalyst temperature model – Temperature in catalyst, tikatm
 |-
 |
 ZATMIKML2
 |
 Time
 constant for catalyst temperature model – Temperature in catalyst, cylinder bank
 |-
 |
 ZATMKKML
 |
 Time
 constant for catalyst temperature model – catalyst temperature tkatm during
 cooling
 |-
 |
 ZATMKKML2
 |
 Time
 constant for catalyst temperature model – catalyst temperature tkatm during
 cooling, bank 2
 |-
 |
 ZATMKML
 |
 Time
 constant for catalyst temperature model – catalyst temperature tkatm
 |-
 |
 ZATMKML2
 |
 Time
 constant for catalyst temperature model – catalyst temperature, cylinder bank
 |-
 |
 ZATMRML
 |
 Time
 constant for exhaust gas temperature model – exhaust pipe wall temperature
 |-
 |
 ZATMRML2
 |
 Time
 constant for exhaust gas temperature model – exhaust pipe wall temperature Bank
 |-
 |
 ZATRKRML
 |
 Time
 constant for exhaust gas temperature model – manifold wall temperature
 |-
 |
 ZATRKRML2
 |
 Time
 constant for exhaust gas temperature model – manifold wall temperature, cylinder
 bank 2
 |-
 |
 Variable
 |
 Description
 |-
 |
 B_ATMLL
 |
 Condition
 for time constant during cooling at idle
 |-
 |
 B_ATMLL2
 |
 Condition
 for time constant during cooling at idle
 |-
 |
 B_ATMST
 |
 Condition
 for tabgmst, tkatmst initial value calculation
 |-
 |
 B_ATMST2
 |
 Condition
 for tabgmst, tkatmst calculation, cylinder bank 2
 |-
 |
 B_ATMTPA
 |
 Condition:
 dew point before catalyst exceeded
 |-
 |
 B_ATMTPA2
 |
 Condition:
 dew point 2 before catalyst exceeded
 |-
 |
 B_ATMTPF
 |
 Condition:
 dew point before catalyst exceeded (last trip)
 |-
 |
 B_ATMTPF2
 |
 Condition:
 dew point before catalyst exceeded (last trip) cylinder bank 2
 |-
 |
 B_ATMTPK
 |
 Condition:
 dew point after catalyst exceeded
 |-
 |
 B_ATMTPK2
 |
 Condition:
 dew point 2 after catalyst exceeded
 |-
 |
 B_ATMTPL
 |
 Condition: dew point after catalyst exceeded (last trip)
 |-
 |
 B_ATMTPL2
 |
 Condition: dew point after catalyst exceeded (last trip) cylinder bank 2
 |-
 |
 B_FAATM
 |
 Condition: functional requirements for dew
 point end times
 |-
 |
 B_KH
 |
 Condition: catalyst heating
 |-
 |
 B_KW
 |
 Condition: catalyst warming
 |-
 |
 B_LL
 |
 Condition: idle
 |-
 |
 B_NACHL
 |
 Condition: ECU delay
 |-
 |
 B_NACHLEND
 |
 Condition: ECU delay ended
 |-
 |
 B_NLATM
 |
 Condition: ECU delay exhaust gas temperature
 model probe protection
 |-
 |
 B_PWF
 |
 Condition: Power fail
 |-
 |
 B_SA
 |
 Condition: Overrun cut-off
 |-
 |
 B_ST
 |
 Condition: Start
 |-
 |
 B_STEND
 |
 Condition: End of start conditions achieved
 |-
 |
 B_STNDNL
 |
 Condition: Beginning of ECU delay or end of
 start conditions (1 ® 0)
 |-
 |
 B_TFU
 |
 Condition: Ambient temperature sensor
 available
 |-
 |
 B_TRKH
 |
 Condition: Catalyst heating, thermal reaction
 effective
 |-
 |
 B_UHRRMIN
 |
 Condition: timer with a relative number of
 minutes
 |-
 |
 B_UHRRSEC
 |
 Condition: timer with a relative number of
 minutes
 |-
 |
 DFP_TA
 |
 ECU internal error path number: intake air
 temperature TANS (charge air)
 |-
 |
 DFP_TUM
 |
 ECU Internal error path number: ambient
 temperature
 |-
 |
 ETAZWIMT
 |
 Actual ignition angle efficiency average for exhaust
 gas temperature model (200 ms)
 |-
 |
 ETAZWIST
 |
 Actual ignition angle efficiency
 |-
 |
 E_TA
 |
 Error flag: TANS
 |-
 |
 E_TUM
 |
 Error flag: ambient temperature tumg
 |-
 |
 IMLATM
 |
 Integral of air mass flows from engine start
 bis Max.wert
 |-
 |
 IMLATM_W
 |
 Integral of air mass flows from end of start
 conditions up to the maximum value, (Word)
 |-
 |
 IWMATM2_W
 |
 Heat quantity for Condensation - dew points
 exhaust gas/catalyst (word), cylinder bank 2
 |-
 |
 IWMATM_W
 |
 Heat quantity for Condensation - dew points
 exhaust gas/catalyst (word)
 |-
 |
 LAMSBG2_W
 |
 Desired lambda limit (word), cylinder bank 2
 |-
 |
 LAMSBG_W
 |
 Desired lambda limit (word)
 |-
 |
 ML_W
 |
 Filtered air mass flow (word)
 |-
 |
 NMOT
 |
 Engine speed
 |-
 |
 RL
 |
 Relative cylinder charge
 |-
 |
 TABGKRM2_W
 |
 Exhaust gas temperature in manifold from the
 model, cylinder bank 2
 |-
 |
 TABGKRM_W
 |
 Exhaust gas temperature in manifold from the
 model
 |-
 |
 TABGM
 |
 Exhaust gas temperature before catalyst from
 the model
 |-
 |
 TABGM2
 |
 Exhaust gas temperature before catalyst from
 the model, cylinder bank 2
 |-
 |
 TABGM2_W
 |
 Exhaust gas temperature before catalyst from
 the model (word) cylinder bank 2
 |-
 |
 TABGMAB
 |
 Exhaust gas temperature during engine
 switch-off
 |-
 |
 TABGMAB2
 |
 Exhaust gas temperature during engine
 switch-off (model) cylinder bank 2
 |-
 |
 TABGMST
 |
 Exhaust gas temperature at engine start
 |-
 |
 TABGMST2
 |
 Exhaust gas temperature at engine start,
 cylinder bank 2
 |-
 |
 TABGM_W
 |
 Exhaust gas temperature before catalyst from
 the model (word)
 |-
 |
 TABSTATM_W
 |
 Stop time in ECU delay for exhaust gas
 temperature model
 |-
 |
 TABSTMX_W
 |
 Stop time maximum query for exhaust gas
 temperature model
 |-
 |
 TABST_W
 |
 Stop time
 |-
 |
 TAKRKF
 |
 Steady-state manifold exhaust gas temperature without
 correction
 |-
 |
 TAKRKF2
 |
 Steady-state manifold exhaust gas temperature
 without correction, cylinder bank 2
 |-
 |
 TAKRSTC
 |
 Steady-state exhaust gas temperature in
 manifold in °C
 |-
 |
 TAKRSTC2
 |
 Steady-state exhaust gas temperature in
 manifold, cylinder bank 2
 |-
 |
 TANS
 |
 Intake air temperature
 |-
 |
 TATAKRML
 |
 Output from PT1 element: exhaust gas
 temperature influence on tabgkrm
 |-
 |
 TATAKRML2
 |
 Output from PT1 element: exhaust gas
 temperature influence on tabgkrm, cylinder bank 2
 |-
 |
 TATMAML
 |
 Output from PT1 element: exhaust gas
 temperature influence on tabgm
 |-
 |
 TATMAML2
 |
 Output from PT1 element: exhaust gas
 temperature influence on tabgm, cylinder bank 2
 |-
 |
 TATMKF
 |
 Exhaust gas temperature before catalyst from map
 KFTATM
 |-
 |
 TATMKF2
 |
 Exhaust gas temperature before catalyst from map
 KFTATM, cylinder bank 2
 |-
 |
 TATMRML
 |
 Output from PT1 element: exhaust pipe wall
 temperature effect from tabgm
 |-
 |
 TATMRML2
 |
 Output from PT1 element: exhaust pipe wall
 temperature effect from tabgm, cylinder bank 2
 |-
 |
 TATMSTA
 |
 Exhaust gas temperature before catalyst from
 the steady-state model
 |-
 |
 TATMSTA2
 |
 Exhaust gas temperature before catalyst from
 the steady-state model, cylinder bank 2
 |-
 |
 TATRKRML
 |
 Output from PT1 element: exhaust pipe wall
 temperature effect from tabgkrm
 |-
 |
 TATRKRML2
 |
 Output from PT1 element: exhaust pipe wall
 temperature effect from tabgkrm, cylinder bank 2
 |-
 |
 TATU
 |
 Intake air temperature or ambient temperature
 |-
 |
 TEXOIKM2_W
 |
 Exotherme temperature increase in catalyst for
 tikatm, cylinder bank 2
 |-
 |
 TEXOIKM_W
 |
 Exotherme temperature increase in catalyst for
 tikatm
 |-
 |
 TEXOM2_W
 |
 Exotherme temperature increase in catalyst for
 tkatm2, cylinder bank 2
 |-
 |
 TEXOM_W
 |
 Exotherme temperature increase in catalyst for
 tkatm
 |-
 |
 TIKATM
 |
 Exhaust gas temperature in catalyst from the
 model
 |-
 |
 TIKATM2
 |
 Exhaust gas temperature in catalyst from the
 model, cylinder bank 2
 |-
 |
 TIKATM2_W
 |
 Exhaust gas temperature in catalyst from the
 model, cylinder bank 2
 |-
 |
 TIKATM W
 |
 Exhaust gas temperature in catalyst from the
 model
 |-
 |
 TKATM
 |
 Catalyst temperature from the model
 |-
 |
 TKATM2
 |
 Catalyst temperature from the model, cylinder
 bank 2
 |-
 |
 TKATM2_W
 |
 Catalyst temperature from the model (word),
 cylinder bank 2
 |-
 |
 TKATMAB
 |
 Exhaust gas temperature after catalyst through
 engine switch-off (model)
 |-
 |
 TKATMAB2
 |
 Exhaust gas temperature after catalyst through
 engine switch-off (model), cylinder bank 2
 |-
 |
 TKATMST
 |
 Catalyst temperature model initial value as a
 function of switch-off value, switch-off time
 |-
 |
 TKATMST2
 |
 Catalyst temperature model initial value as a
 function of switch-off value, switch-off time, bank 2
 |-
 |
 TKATM_W
 |
 Catalyst temperature from the model (word)
 |-
 |
 TMOT
 |
 Engine temperature
 |-
 |
 TMST
 |
 Engine start temperature
 |-
 |
 TUMG
 |
 Ambient
 temperature
 |-
 |
 VFZG
 |
 Vehicle
 speed
 |-
 |
 ZWMATM
 |
 Counter
 for repeated starts and factor for heat quantity threshold
 |-
 |
 ZWMATM2
 |
 Counter
 for repeated starts and factor for heat quantity threshold, cylinder bank 2
 |-
 |
 ZWMATMF
 |
 Counter
 for repeated starts and factor for heat quantity threshold upstream
 |-
 |
 ZWMATMF2
 |
 Counter
 for repeated starts and factor for heat quantity threshold upstream, cylinder
 bank 2
 |}