The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 1991
Filed:
Nov. 16, 1990
Michael A Davis, Goleta, CA (US);
Philip A Karau, Grand Blanc, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A crankshaft angular position detecting apparatus for detecting the angular position of the crankshaft of an internal combustion engine. The crankshaft drives a timing wheel which has a plurality of circumferentially spaced slots located along its outer periphery. Two angularly spaced sensors are located adjacent the slots. The sensors develop voltage pulses as the slots move past the sensors. Two phase-displaced pulse trains are developed, one by each sensor, as the wheel rotates. The pattern of slots and the angular spacing of the sensors is such that a varying number of pulses of one pulse train occurs between consecutively occurring pulses of the other pulse train. The varying number of pulses provide different patterns and each pattern is indicative of a crankshaft position. The timing wheel is secured to the engine crankshaft and is located inside of the engine.