Patent ID: 6496750
Filing Date: 2002-12-17
Classification: F02D

Abstract:
A system for processing crank angle signals comprising:a crank angle sensor for converting a rotation of a crankshaft into analog signals, wherein the crank angle sensor comprises a sensor wheel having a plurality of teeth formed at predetermined intervals around a circumference of the sensor wheel, the sensor wheel being connected to the crankshaft; and a magnetic pickup for detecting variations in a magnetic field caused by a difference in distance between the teeth of sensor wheel and the magnetic pickup, and a gap between the teeth of the sensor wheel and the magnetic pickup, the difference in distance occurring as a result of a rotation of the sensor wheel; a switching circuit for converting the analog signals into crank angle signals; a timer/counter for detecting a number of pulses and tooth periods of the crank angle signals; a phase sensor for converting a rotation of a camshaft into cylinder identity signals and outputting the cylinder identity signals; and an electronic control unit for receiving the crank angle signals and the cylinder identity signals and using the signals to determine cylinder identity and rpm.