Idle control system for and engine.

摘要

A method and apparatus for controlling the idling rotational speed of an engine (10) regulate the timing of fuel injection within the rotational cycle of the engine. If the engine idling speed is outside a predetermined range of speeds, containing a target idling speed, the timing of fuel injection is advanced within the rotational cycle of the engine (10) to increase idling speed, or retarded to decrease idling speed. Fuel injection timing is advanced by a relatively large amount in the event that the idling speed falls below a predetermined stalling speed. Better idle control of a crankcase scavenged two-stroke engine can be obtained with respect to prior art systems.