PURPOSE: To prevent an engine from temporarily rising or dropping in its idling speed by providing both a control means which regulates an idling speed to a target value and a transmission gear actuating means which transmits an engine output to or cuts it from engine accessories.
CONSTITUTION: A relay switch 5 and a transistor 6 are provided so as to actuate a compressor magnet clutch 4 at a time when a certain lapse passed after a control circuit 100 generated an output to turn an air conditioner switch 3 on or off. Since the air conditioner shall not be operated until the power of an engine is increased to a certain extent, there is no possibility that the idling speed of the engine may be temporarily reduced immediately after the air conditioner switch 3 is turned on. Once the air conditioner switch 3 is turned off, the control circuit 100 sends an output to the base terminal of the transistor 6 after a lapse of a specified time counted from the point of the turning on. Meanwhile, since the air conditioner is kept in operation during this period, temporary rise in idling speed may be prevented.
SAWAMOTO KUNIAKI
MORITA TATSUROU
MIWAKEICHI HIROSHI
TAKIZAWA SATORU
Next Patent: IDLING SPEED CONTROLLER OF INTERNAL-COMBUSTION ENGINE