초록 ▼

In a method of and system for controlling an idling speed in an electronically controlled engine, wherein the idling speed is feedback-controlled in accordance with the operating condition of the engine, an idling speed feedback process and an engine speed upper limit setting process are prohibited

In a method of and system for controlling an idling speed in an electronically controlled engine, wherein the idling speed is feedback-controlled in accordance with the operating condition of the engine, an idling speed feedback process and an engine speed upper limit setting process are prohibited when a vehicle speed detecting system has failed, so that erroneous control of the idling speed can be prevented from occurring during running of a vehicle.

대표청구항 ▼

In a system of the type including an internal combustion engine, means for converting rotational energy produced by said engine to movement of a vehicle, and means for automatically controlling said engine to idle at a predetermined idle speed whenever said vehicle is stationary, an improvement comp

In a system of the type including an internal combustion engine, means for converting rotational energy produced by said engine to movement of a vehicle, and means for automatically controlling said engine to idle at a predetermined idle speed whenever said vehicle is stationary, an improvement comprising: means for sensing the velocity of said vehicle; means for sensing at least one engine operating parameter including air sensing means for sensing the amount of air delivered to said engine and angular velocity sensing means for sensing the angular velocity of the rotational energy produced by said engine; and further automatic control means for inhibiting said automatic idle control means from operating whenever the velocity of said vehicle sensed by said velocity sensing means is zero and a vehicle moving condition is determined from the amount of air sensed by said air sensing means, said amouut of air exceeding a predetermined amount, and the angular velocity sensed by said angular velocity sensing means, said angular velocity falling within a predetermined range. ln a system of the type including an internal combustion engine, means for converting rotational energy produced by said engine to the transmission of a vehicle, and means for automatically controlling said engine to idle at a predetermined idle speed whenever said vehicle is stationary, a method comprising the steps of: (1) sensing the velocity of said vehicle; (2) determining, in response to said sensing at step (1), whenever the velolity of said vehicle is zero; (3a) sensing the amount of air delivered to said engine; (3b) sensing the angular velocity of the rotational energy produced by said engine; (4) determining that said vehicle is moving whenever the amount of air sensed at step (3a) exceeds a predetermined amount and the angular velocity sensed at step (3b) falls within a predetermined range; and (5) inhibiting said automatic idle control means from operating whenever said determining step (2) determines that said vehicle velocity is zero and said determining step (4) determines that said vehicle is moving.