I was intrigued by image 2 where you have the WPS connected in cylinder, running at idle with the remaining spark plug still installed and combustion taking place. Can you confirm this is correct? (Nice one by the way)
How did you get all those wave forms up at once? You can set delays for individual wave forms? I counted six wave forms. Keep up the good work. I'm enjoying all of it.
What has amazed me about the WPS running compression waveform (Combustion present) is the complete loss of the expansion pocket at the base of the power stroke.
If we see an event such as this during a running compression test (No combustion) we could assume the exhaust valve to be opening early (advanced)
We know in this case it cannot be relevant as the running compression (No combustion) has a perfect expansion pocket.
I wonder if this could be as a result of the increased pressure inside the cylinder due to combustion?
What is interesting is that we do not appear to have an increase in peak cylinder pressure after ignition as I would have imagined. (Diesel springs to mind)
What I find interesting is how much higher the non combustion peak pressure is compared to when combustion is occurring.
Would you have any objections to a summary of this post (when complete) in the form of a topic for the newsletter?
Not sure when, but I think the information and theories here are invaluable and should be shared.
Based on the explanations above, the video and the fact the demand on intake air will be increased during combustion I can see how how supply cannot be met with demand given the increase in speed of the piston during combustion.
In this scenario its not surprising the peak pressure is slightly lower during combustion that the running compression test (no combustion)
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