Patent ID: 6073713
Filing Date: 2000-06-13
Classification: F02D,F02N,G01D

Abstract:
A crankshaft position sensing apparatus for use with an engine having a combined starter/alternator assembly, a crankshaft, and a camshaft, the crankshaft position sensing apparatus comprising:a tone ring adapted to affix to a rotational portion of the combined starter/alternator assembly, with the tone ring including indications spaced circumferentially around the tone ring;sensing means, located in proximity to the indications and adapted to be fixed rotationally relative to the engine, for producing an initial crankshaft signal in response to rotation of the tone ring;camshaft sensing means adapted for producing a camshaft position signal in response to rotational motion of the camshaft;a bandpass filter for receiving and processing the initial crankshaft signal and the camshaft position signal and for producing a filtered crankshaft signal; anda limiter for receiving the filtered crankshaft signal and for outputting a crankshaft rotational position signal.