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Engine Crankshaft Position Recognition and Tracking Method Applicable to Cam and Crankshaft Signals with Arbitrary Patterns

Abstract: 

A method and system for providing data representing crankshaft position. For each rising edge of the crankshaft signal, a position value and a factor value are stored in a look-up table. Cam and crankshaft signals are used to locate an initial crankshaft position. This initial position value is used as a pointer to the look-up table, and incremented with each rising pulse of the crankshaft signal. Data from the table is used to extrapolate crankshaft position from crankshaft signal values to a desired resolution in degree angle units.

Patent Number: 
7,076,361
Date Of Issue: 
07/11/2006
Inventors: 

Junmin Wang; Jayant V. Sarlashkar