Patent ID: 7499793
Filing Date: 2009-03-03
Classification: F02D

Abstract:
1. A system for discrimination of spurious crank encoder signals in an internal combustion engine, comprising: a) a crankshaft position encoder for generating a pulsed signal indicative of rotational performance of said crankshaft; and b) an engine controller for receiving said pulsed signal from said encoder and for generating signals controlling engine functions including but not limited to spark and fuel injection timing, wherein said controller computes from said encoder generated signals a period between a first pulsed signal and a second pulsed signal indicative of engine speed, applies a calculation to determine a rate of engine acceleration/deceleration, calculates an expected time window for receiving a third pulsed signal, recognizes said third pulsed signal that arrives within the expected time window, and rejects said third pulsed signal that arrives outside the expected time window.