Idling speed control device of an internal combustion engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 6, 1984
Issued Date -
N/A
app pub date -
Apr 26, 1983
filing date -
Oct 6, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An idling speed control device of an internal combustion engine comprising a bypass passage which interconnects the intake passage located upstream of the throttle valve to the intake passage located downstream of the throttle valve. A flow control valve is arranged in the bypass passage and actuated by a step motor for controlling the amount of air flowing within the bypass passage to maintain the idling speed of an engine at a predetermined speed. The step motor comprises a screw threaded valve shaft and a rotor rotatably mounted on the valve shaft and having a screw threaded center hole which is in engagement with the screw threads of the valve shaft. A pair of stop pins, each being engageable with the corresponding end face of the rotor, is fixed onto the valve shaft.
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