Method of adjusting idling revolution speed

Abstract

Abstract PURPOSE: To facilitate adjustment work, by providing a main and an accessory intake by-passes around a throttle valve and by adjusting a flow control mechanism in the auxiliary intake by-pass as a drive signal remains applied to a flow control mechanism in the main intake by-pass. CONSTITUTION: To perform adjustment work, a drive signal of prescribed magnitude is applied from a drive signal generator 29 to a flow control mechanism 14 in a main intake by-pass 13 as a throttle valve 12 is in an idling position and an engine is warmed up enough. A desired idling revolution speed is then set by rotating an idling adjustment screw 18 in an accessory intake by-pass 17 while monitoring the revolution speed of the engine through a tachometer 30. In ordinary operation after the adjustment work, signals are applied from a crank angle sensor 20, a water temperature sensor 23, etc. to the flow control mechanism 14 and the real revolution speed of the engine is regulated to be equal to a command corresponding to the temperature of the engine, by a control circuit 10 which generates a control signal. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Hideo Miyagi

Bibliographic Details