....... shows where the piston velocity is zero for a minuscule time period.
Ok, but your graph post saidIntrument an engine with some higly sensitive and accurate sensors, super high speed slow motion video (did that at work on some stuff), whatever to measure distance and time ... or do it mathematically (kinematics) knowing the physical dimensions and motion of the components. As said before, the dt the piston is V=0 at TDC or BDC varies with engine RPM. Do it at 1 RPM and scale it from there.
....... shows where the piston velocity is zero for a minuscule time period.
I am very interested in knowing the quantitative value of the small time period where v=0, for any rpm.
How small was the time period? Was it 2nsec, was it less than that, was it more than that? If the observation is say just 1nsec, then wow, that's some very very fast data acquisition sensors and software, it would need to be faster than 1GHz.
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