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Author Topic: [ME7.1] looking for solution for raising starting throttle opening  (Read 2829 times)
Rocky
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Hi friends

ME7.1 2.8 VR6
injectors bosch 630ccm

i'm looking for solution for raising starting throttle opening. Starting rpms are very poor, even my target idle rpms are set on 1000. Without touching Acc pedal there is no chance for start.

in me7.1.1 r32 damos there is module WDKSOM: "2.40      Berechnung Drosselklappensollwinkel ohne Momentenstruktur"

KFWDKSST Sollwert Drosselklappenwinkel im Start - there is start throttle angle.

i have tried:

BBKHZ: "18.280    Betriebsbereich motorisches Katheizen"
KFNLLKHM
KFNFSKHM

LLRNS: "541.220   Leerlaufregelung-Solldrehzahl"
FNSSTM
FNSSTKM

STADAP: "6.80      Startmengen-Adaption"
NSTAK
DNBURN0
DNBURN1
DNBURN2
KLDNFHO

with no effect.



Have some idea how to increase starting rpms to 1200 than falling to normal idle?

Regrads
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Mikhail
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« Reply #1 on: January 02, 2018, 08:26:03 AM »

I had weak idle and got it and starting good by changing idle torque P and I control values.
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Rocky
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« Reply #2 on: January 02, 2018, 12:28:36 PM »

I had weak idle and got it and starting good by changing idle torque P and I control values.

U mean this module?:

LLRRM: 6.60      Leerlaufregelung Reglereingriff Drehmoment

  IVDN - LLR: I-Verstärkung bei stehendem Fahrzeug
  IVDNV - LLR: I-Verstärkung bei rollendem Fahrzeug

  PVDN - LLR: P-Verstärkung bei stehendem Fahrzeug
  PVDNV - LLR: P-Verstärkung bei rollendem Fahrzeug
  PVLDN - LLR: P-Verstärkung bei stehendem Fahrzeug (Luftanteil)
  PVLDNV - LLR: P-Verstärkung bei stehendem Fahrzeug (Luftanteil)

Is this have influence on starting, cranking?
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Mikhail
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« Reply #3 on: January 02, 2018, 10:16:35 PM »

I changed
PVDNHOM
PVLDNEZ
IVDNDTEH
IVDNHOM
IVDNHOMV

My broplem was weak idle and got it sorted. I'm pretty sure that the starting got better too. Try P things first.
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