Electronics > Projects, Designs, and Technical Stuff

Catching car's ignition signal

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cmcraeslo:
Hello.
@Labrat101 - I'm not trying to diagnose the car's issues with this.

What I'm trying to do is to build ignition cut device, that is catching the signal, "processing it" and then output it. I have the device working on a car with ignition drivers built in the coils, but not when coils are directly driven.
Device uses very sophisticated cutting strategies, so it's not just "coil off" cutting so I need to have clean signal coming in constantly so I can process them correctly.

@mikerj - that is very advanced control. Do you know how many cars use this? This could be a deal breaker for me for sure.

Labrat101:
Ok that you can do by using an induction pick up  .
There are clamp over that can be bought ..
But as you are building it . I would use ether a Hall effect transistor or a ferrite ring with a few turn .

 I don't fully understand why you are doing this .. you are supping up an old car
 if so you have to add the    N02   :-+

 You are getting into to some heaving stuff .  good luck

cmcraeslo:
@Labrat101 - You don't understand. I need to cut the signal coming out of the ECU. I can do pickup reading on connected coil, but it's not connected in my case. I dont know how to explain it otherwise :)

Labrat101:

--- Quote from: cmcraeslo on August 04, 2020, 10:53:42 am ---@Labrat101 - You don't understand. I need to cut the signal coming out of the ECU. I can do pickup reading on connected coil, but it's not connected in my case. I dont know how to explain it otherwise :)

--- End quote ---
Ok .
I think I know what you are trying to do .
 But I have this feeling your are working on a industrial Project .By they way you are keeping 95% of what you are really
 doing  Not told . You have already invested some very expensive equipment in this update to a ignition system.


--- Quote ---  This could be a deal breaker for me for sure.
--- End quote ---
 

  To break a signal is really not Hard but if this is for commercial gain and NOT a hobby etc.
 Sorry I am out  . TTFN




HighVoltage:
Best to use is a current probe to watch the ECU signal.
Most of the time it is around 10 mA to 20 mA but some latest systems have less than 1 mA

Also, some systems use the amount of current from the ECU to the coils as a signal to get the
coil in to different mods. And others use the current as a feedback from the coils to tell the ECU how the last spark performed.

There are many different systems around these days.
What car is it and what is the coil being used?

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