frm_w and trims

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Topic: frm_w and trims (Read 16226 times)

masterj

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	Re: frm_w and trims « Reply #15 on: October 18, 2012, 06:15:02 AM »

Quote from: Bische on October 17, 2012, 07:30:06 PM

I have been turning off LTFT's but not closed loop, and have been doing this when I have been setting up for FKKVS/FRLFSDP/KRKTE on my returnless wideband 7.5.

It get reaaaally old to dial those maps when you have 1000cc injectors which are basicly non-linear until you get in boost, when you have partial LTFT skewing up the mixture. Does not really make much difference with them on or off now, as my corrections are +-5% under normal driving conditions, well at least over ~1ms effective PW's.

When im happy with my fueling model, im ofcourse turning them on again for the reasons prj mentioned.

IIRC its 4x5 or 5x4, I used the TT damos as reference, I can take a look after work.

I'm doing same for fuel adjustments... Basically with my ME7 Wizzard I'm generating FKKVS table with trims disabled. I'll check out TT damos, but if you could look too that would be awesome. Thanks


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masterj

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	Re: frm_w and trims « Reply #16 on: October 18, 2012, 07:30:20 AM »

BTW: I've checked LRSHK function for postcat o2 sensor. Basically if anyone wants to disable sensor postcat correction but leave sensor plugged in then all you have to do is set bit0 and bit1 of CLRSHK to 1 (TRUE):

CLRSHK (bit0) = 1 => b_lrhkg = 0 => b_lrhkb = 0 => b_lrhkp = 0 => dlahp_w = 0
CLRSHK (bit0) = 1 => b_lrhkg = 0 => b_lrhkb = 0 => b_lrhk = 0
CLRSHK (bit1) = 1 => dlahi_w = 0

(single bank systems)

I know that in s4wiki it is said to set CLRHK to 5 but I don't know why it is needed so. 3 is enough


« Last Edit: October 18, 2012, 09:09:31 AM by masterj »	Logged

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phila_dot

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	Re: frm_w and trims « Reply #17 on: October 18, 2012, 08:39:49 AM »

Quote from: masterj on October 18, 2012, 07:30:20 AM

BTW: I've checked LRSHK function for postcat o2 sensor. Basically if anyone wants to disable sensor postcat correction but leave sensor plugged in then all you have to do is set bit0 and bit1 of CLRSHK to 1 (TRUE):

CLRSHK (bit0) = 1 => b_lrhkg = 0 => b_lrhkb = 0 => b_lrhkp = 0 => dlahi_w = 0
CLRSHK (bit0) = 1 => b_lrhkg = 0 => b_lrhkb = 0 => b_lrhk = 0
CLRSHK (bit1) = 1 => dlahi_w = 0

(single bank systems)

I know that in s4wiki it is said to set CLRHK to 5 but I don't know why it is needed so. 3 is enough

IIRC, I decided to set bit 2 to ensure that atv is clear.


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masterj

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	Re: frm_w and trims « Reply #18 on: October 18, 2012, 10:54:28 AM »

Quote from: phila_dot on October 18, 2012, 08:39:49 AM

IIRC, I decided to set bit 2 to ensure that atv is clear.

Oh, I see... Phila_dot, have you checked the DLSSA function? I'm kinda lost here... How is system constant SY_STETLR set? Shocked

When is DLSSA called? (Maybe we should increase DLAHISATO & DLAHISATU, when dhali_w = 0?) (I hate these ASCII diagrams...)

Also, when we disable LRSKA I think we still have to look at LAMKO... In LAMSEL when lamka_w < 2.0 then B_lamka is set and min value is taken between lamka_w & lamnswl_w.... Or am I wrong here?


« Last Edit: October 18, 2012, 05:41:56 PM by masterj »	Logged

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masterj

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	Re: frm_w and trims « Reply #19 on: October 18, 2012, 05:17:16 PM »

One more small thing noticed... If you look at the ETALAM map you can find out which AFR is most effective to your car (axis is lambda x 14.7 = AFR)

I did small calculation and found out that at the ~13.2 AFR I get 101.5% of power Wink


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prj

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	Re: frm_w and trims « Reply #20 on: October 19, 2012, 05:35:19 AM »

Quote from: masterj on October 18, 2012, 05:17:16 PM

Yes, an ECU value can tell you what AFR to tune to .... Roll Eyes

Just a tip - you are very wrong.


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masterj

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	Re: frm_w and trims « Reply #21 on: October 19, 2012, 09:12:15 AM »

Quote from: prj on October 19, 2012, 05:35:19 AM

Yes, an ECU value can tell you what AFR to tune to .... Roll Eyes

Just a tip - you are very wrong.

I'm just saying how engineers in bosch thought and also programmed ecu. By using said AFR you'll get multiplier of 1,015 of your max torque


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ABCD

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	Re: frm_w and trims « Reply #22 on: October 21, 2012, 08:45:28 PM »

Quote from: masterj on October 18, 2012, 05:17:16 PM

What calculation you did?
I didnt quite get you...


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masterj

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	Re: frm_w and trims « Reply #23 on: October 22, 2012, 04:43:19 AM »

Quote from: ABCD on October 21, 2012, 08:45:28 PM

What calculation you did?
I didnt quite get you...

Look at the ETALAM map in FR and analyze it's axis. It is lambda val of 1V which is stoich...


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prj

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	Re: frm_w and trims « Reply #24 on: October 23, 2012, 05:37:23 AM »

Quote from: masterj on October 19, 2012, 09:12:15 AM

I'm just saying how engineers in bosch thought and also programmed ecu. By using said AFR you'll get multiplier of 1,015 of your max torque

Which means absolutely nothing in an actual real world scenario, as by using this uber AFR of yours you will reduce torque.


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