Patent ID: 6058766
Filing Date: 2000-05-09
Classification: F02D,G01D

Abstract:
A crank angle detector comprising:a rotary body which rotates in association with a crankshaft of an engine and has portions to be detected every predetermined angle and in which at least one of said portions to be detected is lacking;first and second pickups positioned near the outer periphery of said rotary body with a fixed angle difference therebetween, for generating first and second pulses for each time the portion to be detected passes nearby;first pulse detecting means for detecting the first pulse output from said first pickup;second pulse detecting means for detecting the second pulse output from said second pickup; andreference position setting means for setting a reference position time for a rotating angle of said crankshaft, wherein when a number of second pulses equal to or more than a predetermined number are detected by said second pulse detecting means after the first pulse has been detected by said first pulse detecting means, said reference position setting means sets the time the first pulse is newly detected by said first pulse detecting means, as a reference position time for a rotating angle of said crankshaft.