PicoScope 7 Automotive
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timing phase
timing phase
good morning, I want to ask a question, is it possible to diagnose the crankshaft and camshaft signals with the pico to understand if the phase time is correct, is there a rule? Either this is a subjective logic for each diesel or petrol engine or it establishes it the manufacturer, let me explain, if I check the crankshaft signal and the camshaft signal in double track without synchronizing any cylinder, can I understand how many degrees of difference there must be between an engine signal and the cam signal?
Re: timing phase
Hi,
The answer is you can meassure the angle very accurately.
However you need to know the good known waveform value and also the condition at the capture.
Cam solenoids activated ot not activated. Another words, cam solenoids unplugged on both, good known and your car. Then you can compare and exactly meassure the deviation between the two.
(if the solenoids are active, the angle will be modulated and therefore you won't know what is the mechanical basic setting and modulated angle)
Some engines are idling with cams not modulated, some are active.
Hope it helps,
Best Regards,
Roman
The answer is you can meassure the angle very accurately.
However you need to know the good known waveform value and also the condition at the capture.
Cam solenoids activated ot not activated. Another words, cam solenoids unplugged on both, good known and your car. Then you can compare and exactly meassure the deviation between the two.
(if the solenoids are active, the angle will be modulated and therefore you won't know what is the mechanical basic setting and modulated angle)
Some engines are idling with cams not modulated, some are active.
Hope it helps,
Best Regards,
Roman
-
Steve Smith
- Pico Staff Member
- Posts: 1594
- Joined: Sun Aug 25, 2013 7:22 am
Re: timing phase
Hello and thank you for the posts
The inhibiting of VVT operation is paramount as Roman has explained
We have some examples of such tests here viewtopic.php?p=101634#p101634 in our One Waveform One Picture series
The above link also contains additional links to correlation measurements with PicoScope 6 (which I will amend to PS7) but they do serve as good examples of the measurement techniques
The following video uses data taken from the Reference Waveform Library (RWL) to carry out correlation measurements using PicoScope 7
Whilst Ben's video takes you through the functionality of the RWL
I hope this helps, take care......Steve
The inhibiting of VVT operation is paramount as Roman has explained
We have some examples of such tests here viewtopic.php?p=101634#p101634 in our One Waveform One Picture series
The above link also contains additional links to correlation measurements with PicoScope 6 (which I will amend to PS7) but they do serve as good examples of the measurement techniques
The following video uses data taken from the Reference Waveform Library (RWL) to carry out correlation measurements using PicoScope 7
Whilst Ben's video takes you through the functionality of the RWL
I hope this helps, take care......Steve