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Old 10-15-2019, 08:43 PM   #39
40 Deluxe
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Join Date: May 2010
Location: now Kuna, Idaho
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Default Re: Max Compression Ratio

Quote:
Originally Posted by Railcarmover View Post
No it doesnt,the crankshaft position sensor works on hall effect,the passing of a steel reluctor wheel or tone ring (it has teeth,not unlike a gear) above a magnetic pickup.As the crankshaft spins the teeth/space coupled with the magnet makes an impulse,the impulse is read by the ECM.

https://www.samarins.com/glossary/crank_sensor.html

The cited article states: "The signal from the crankshaft position is also used to monitor if any of the cylinders misfires."
Other references state that what is monitored is the slight accelleration of the crankshaft at each firing. If this slight "kick" is not detected, it is recorded as a misfire. Another article mentioned that the system "has to be invulnerable to torsional oscillations" and other 'noise'. So I had things somewhat mixed up! A good reminder for me to check things out first.
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