Patent ID: 6352489
Filing Date: 2002-03-05
Classification: B60K,B60L,B60W,F02N,Y02T,Y10S,Y10T

Abstract:
An engine control system for a hybrid vehicle, having an internal combustion engine and an electric motor as driving force sources, comprising:a clutch, operable by an operator of the vehicle, provided between said engine and a manually-operated transmission system, for disabling and enabling driving force transmission between said engine and said transmission system; a clutch disengagement detector for detecting engagement or disengagement of said clutch; an engine speed detector for detecting an engine speed; and a fuel cutter for permitting stopping and restarting of said engine in accordance with at least a result of detection by said clutch disengagement detector among predetermined drive conditions, and cutting fuel supply to said engine when said vehicle decelerates, a fuel-supply restart engine speed at which fuel supply is resumed being set in said fuel cutter, wherein said stopping engine is accomplished by cutting fuel supply by said fuel cutter, and wherein once the engine stop control is initiated, even when said engine speed reaches said fuel-supply restart engine speed, fuel supply cut by said fuel cutter is maintained, and when said engine speed detected by said engine speed detector at a time of disengagement of said clutch is detected by said clutch disengagement detector is equal to or less than a predetermined engine speed, fuel supply cut by said fuel cutter is maintained whereas when said detected engine speed is greater than said predetermined engine speed, fuel supply is restarted.