Patent ID: 6834739
Filing Date: 2004-12-28
Classification: F01M

Abstract:
A vehicle-mounted four cycle engine control device, comprising;an oil pressure detecting sensor that detects a pressure of lubricating oil circulated under pressure in an engine; an oil pressure detecting sensor failure judging system that judges whether or not the oil pressure detecting sensor has failed; an engine speed judging system that judges whether or not a speed of the engine is equal to or above a predetermined engine speed; a pressure state judging system that judges whether or not the lubricating oil pressure detected by said oil pressure detecting sensor continues to be lower than a predetermined reference pressure for at least a predetermined time interval; and an engine control system that reduces said engine speed when it is respectively judged by each of said judging systems that said oil pressure detecting sensor has not failed, that the engine speed is equal to or above the predetermined engine speed, and that the lubricating oil pressure continues to be lower than the reference pressure for a predetermined delay time or more.