Patent ID: 8733319
Filing Date: 2014-05-27
Classification: F02D

Abstract:
1. An electronic governor system comprising: an electronic control throttle including an actuator driving type throttle valve and a throttle position sensor; an engine rotation number sensor; and a control device which performs an operation to open and close the throttle valve in accordance with an engine operation state while detecting at least an output signal from the throttle position sensor and an output signal from the engine rotation number sensor, to maintain a desired engine rotation number, wherein the control device performs a first failure judgment method to constantly monitor an error of detected throttle position data with respect to a desired throttle control value and judge that a failure of a throttle control system has occurred in a case where an absolute value of the error exceeds a predetermined threshold value continuously for a predetermined time or longer, and the control device performs a second failure judgment method to judge that a serious failure has occurred in the system in a case where a detected engine rotation number exceeds a predetermined rotation number continuously for a predetermined time or longer, to perform predetermined operations in accordance with the judgment results.