Device for controlling the idling speed of an engine

Details Device for controlling the idling speed of an engine Device for controlling the idling speed of an engine

1982-06-24

1984-06-12

Dolinar, Andrew M.

Internal-combustion engines

Engine speed regulator

Idle speed control

123585, F02M 2306

Patent

active

044535155

ABSTRACT:
An engine comprising a main intake passage having a throttle valve therein. A bypass passage is branched off from the main intake passage located upstream of the throttle valve and is connected to the main intake passage located downstream of the throttle valve. A flow control valve, actuated by a step motor, is arranged in the bypass passage. The step motor comprises a rotor and a stator having exciting coils. When the engine is operating in an idling state, the exciting coils are excited for rotating the step motor in a rotating direction wherein the engine speed approaches a desired idling speed. When the engine speed becomes equal to the desired engine speed and is higher than a predetermined speed, the exciting coil, which was finally excited immediately before the engine speed becomes equal to the desired idling speed, is intermittently excited in order to maintain the step motor stationary.

REFERENCES:
patent: 4359983 (1982-11-01), Carlson et al.
patent: 4381747 (1983-05-01), Kobayashi et al.

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