Author Topic: Knock sensing issues  (Read 8158 times)

Offline Takumi

  • Jr. Member
  • **
  • Posts: 6
  • BHP: 0
Knock sensing issues
« on: May 02, 2011, 09:26:09 am »
hello,

got my car running ( I5 10v turbo MC audi engine with 1 knock sens.). Using 1.1.90 FW and knock chan 0. Pls check my log and tell, if this is right as my friend sees like 5 times stronger 'signal'indication on knock gauges and his I5 20v...tried 4 different sensors, using external knock gauge too - when hitting with wrench it flashes... Anyways for me it seems like knock sensor sesitivity is veryyy low...tried different engine places - same story. Maybe some settings are missing...
Here is my quick log: http://www.mediafire.com/?10dtb4ju85n0c83


Thanks,
T.

Offline GintsK

  • Hero Member
  • *****
  • Posts: 1257
  • BHP: 50
Re: Knock sensing issues
« Reply #1 on: May 02, 2011, 01:10:55 pm »
Knock chip has adjustable gain. In 1.1.90 you can adjust gain for each cylinder individually.
As I knew for BOSCH non-resonant sensors with hole for screw gain = 2 is not too much. Because output voltage is really low.

You also can rise signal level by decreasing integral constant. But first try to find gain for each cylinder - you want equal signal levels when WOT. Then adjust integral constant so that maximum levels is 200-300 when no knock.

Please use 100% Knock reference for all cylinders

Gints

Offline Takumi

  • Jr. Member
  • **
  • Posts: 6
  • BHP: 0
Re: Knock sensing issues
« Reply #2 on: May 02, 2011, 01:28:49 pm »
Thanks alot! Will try it :)

Offline z0tya

  • Sr. Member
  • ****
  • Posts: 252
  • BHP: 11
Re: Knock sensing issues
« Reply #3 on: May 02, 2011, 02:43:44 pm »
where can i download 1.1.90?

Offline Denmark

  • Hero Member
  • *****
  • Posts: 542
  • BHP: 7
Re: Knock sensing issues
« Reply #4 on: May 03, 2011, 08:49:23 pm »
So This is working now?

/Skassa
working on the boxer

Offline GintsK

  • Hero Member
  • *****
  • Posts: 1257
  • BHP: 50
Re: Knock sensing issues
« Reply #5 on: May 03, 2011, 09:54:39 pm »
So This is working now?

/Skassa
Knoksense works for years for Andrey. But 1.1.90 is questionable: Using 24-1 4cyl I got some problems when inj duty cycle hits 100%. full engine cut or two cylinders left.