Patent ID: 6445998
Filing Date: 2002-09-03
Classification: F02D,F02P,Y02T

Abstract:
An engine control unit comprising:pulse interval measuring means for receiving a crank signal having a reference position in a train of pulses of predetermined angle intervals corresponding to rotation of a crankshaft of an engine and measuring a pulse interval; frequency multiplication signal generating means for generating frequency multiplication signals of integer times by the next pulse on the basis of the pulse interval of this time measured by the pulse interval measuring means; first control means for executing an engine control based on the frequency multiplication signals while performing initialization at the reference position in the crank signal; second control means for executing the engine control in accordance with a signal specifying a cylinder position and the crank signal; and switching means for performing the engine control by the second engine control means at least until the reference position in the crank signal is detected at the time of engine start and switching the engine control to the engine control performed by the first engine control means at predetermined timing after the reference position in the crank signal is detected.