Picking up coil firing events in injector waveform

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Frs2180
OneWave
OneWave
Posts: 10
Joined: Wed Apr 25, 2018 6:36 pm

Picking up coil firing events in injector waveform

Post by Frs2180 » Wed Nov 06, 2019 9:32 pm

Scoping a petrol fuel injector current and I seem to be getting hash in my waveform which looks like coil firing events. Can someone explain why this happens? I also randomly get a large spike in the fuel current ramp... pic included. Current clamp connected at 15amp fuse.
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20191106_152233.jpg

liviu2004
TwoWaves
TwoWaves
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Location: Netherlands

Re: Picking up coil firing events in injector waveform

Post by liviu2004 » Wed Nov 06, 2019 10:54 pm

With a picoscope, this never happens. The scope you have is a bit ... over rated.

Frs2180
OneWave
OneWave
Posts: 10
Joined: Wed Apr 25, 2018 6:36 pm

Re: Picking up coil firing events in injector waveform

Post by Frs2180 » Thu Nov 07, 2019 7:01 am

I more than agree with that :D don't rate the scope at all

ronw38
OneWave
OneWave
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Joined: Sun Aug 27, 2017 8:00 am

Re: Picking up coil firing events in injector waveform

Post by ronw38 » Thu Nov 07, 2019 8:32 am

Stick to basics, why concentrate on this area, this tool will have live data, use this to set your direction, the scope function does not have the full capabilities of Pico but with understanding of the basics it will help find a conclusion. Check out Scanner Danners web site for Snap On info. There is an old saying in this business dont over think the problem. Hope this helps cheers RonW

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