VEMS Community Forum

Technical => Solenoids => Topic started by: og on February 03, 2021, 10:02:59 pm

Title: IAC PWM Output
Post by: og on February 03, 2021, 10:02:59 pm

Hi
I finally set up my Mercedes M119 engine with a VEMS. It´s running now quite good but I´m facing the problem with idle.
My setup is a 2 wire Bosch soleniod. Since I have only 4 ignition outputs, I used EC18-Pin 17 to control via pwm.
Am I right with my considerations that this won´t work.
Should I use one of the logic level outputs instead?

Best regards
Olli

Title: Re: IAC PWM Output
Post by: Kamuto on February 05, 2021, 10:32:14 am

it should work I think, anyway logic level ones wont work, but you always can add aditional IGBT in the ecu, just it will require flyback diode for it.

Title: Re: IAC PWM Output
Post by: og on February 05, 2021, 10:55:16 am

thanks for the reply Kamuto,

I use a diode on the soleniod allready like this 

(http://www.vems.hu/files/MembersPage/PeterJensen/iac.jpg)

is there a how to to add an additional IGBT

Olli

Title: Re: IAC PWM Output
Post by: og on February 14, 2021, 02:57:49 pm

Got it solved, I add one more IGBT and use this output for drive the IAC.

Olli

Title: Re: IAC PWM Output
Post by: LuddeNo1 on November 17, 2023, 04:21:44 pm

HI.
How did you do with the triggerwheel and cam-sync on the m119?

Title: Re: IAC PWM Output
Post by: Kamuto on November 18, 2023, 08:12:57 am

Quote from: LuddeNo1 on November 17, 2023, 04:21:44 pm

HI.
How did you do with the triggerwheel and cam-sync on the m119?

I guess it needs some external trigger wheel, unless you have some info or scope of it's crank signal

Title: Re: IAC PWM Output
Post by: LuddeNo1 on November 18, 2023, 10:53:50 am

I have a m119 with vems but don't know who installed it and it uses the stock triggerwheel but no cam-sync is configured and the config is like this having issues to start but once it started it runs ok.

(http://)