Patent ID: 7403847
Filing Date: 2008-07-22
Classification: F02D,F02P,Y02T,Y10S

Abstract:
1. An engine control device for a straddle type vehicle, having engine output decreasing means for decreasing engine output when a failure has been detected in a throttle valve control system, the engine output decreasing means comprising: target rotational speed setting means for setting an engine speed, after the occurrence of the failure, to a target rotational speed required to decrease engine output, wherein the target rotational speed is set to decrease stepwise by a change of rotational speed (ΔN) at a change of regular time intervals (ΔT) based on the engine speed at a time of the occurrence of the failure, wherein the values of the change of rotational speed (ΔN) and the change of time intervals (ΔT) are gradually increased with a lapse of time; and rotational speed detection means for detecting the engine speed after the occurrence of the failure, wherein when the engine speed detected by the rotational speed detection means is larger than the target rotational speed, an ignition of the engine is cut off.