Idling speed control for vehicle engine - has throttle valve stop which is positionally adjusted for cold starting

摘要

The engine of a motor vehicle is equipped with means to control the idling speed independantly of whether auxiliary equipment, such as air-conditioning equipment, is being driven or not. This is achieved by means of a solenoid (5) which actuates the shaft (2) of the engine throttle valve. To facilitate cold starting of the engine the travel of the actuating rod (4) is limited by a stop (15). This stop is mounted on one end of a spring-loaded bolt (11). The other end of this bolt is fastened to a flexible diaphragm (10) enclosed in a housing (6). This housing (6) is connected to the engine inlet manifold so that on starting the diaphragm (10) is deflected and pulls the shaft (11) against the spring (13) to move the stop (15). USE - COntrol of IC engine idling speed independantly of engine load.