초록 ▼

The ignition timing of an internal combustion engine is controlled to a fixed value during starting or for a period just after starting. However, if the engine is in a high-speed operating condition, the above control for fixing the ignition timing is interrupted and the ignition timing is controlle

The ignition timing of an internal combustion engine is controlled to a fixed value during starting or for a period just after starting. However, if the engine is in a high-speed operating condition, the above control for fixing the ignition timing is interrupted and the ignition timing is controlled to change depending upon the change of the operating conditions of the engine.

대표청구항 ▼

A method of controlling the ignition timing of an internal combustion engine, comprising the steps of: detecting the operating condition of the engine to produce at least one first electrical signal which indicates the detected operating condition; calculating, in response to the produced first elec

A method of controlling the ignition timing of an internal combustion engine, comprising the steps of: detecting the operating condition of the engine to produce at least one first electrical signal which indicates the detected operating condition; calculating, in response to the produced first electrical signal, a spark advance angle which corresponds to an optimum ignition timing at the detected operating condition; detecting whether or not the engine is in a first specific state in which said calculation is difficult to correctly perform, to produce a second electrical signal which indicates that the engine is in the first specific state; producing an indication of a reference speed related to the coolant temperature of said engine, said reference speed increasing as said coolant temperature is decreasing; detecting whether or not the engine is in a second specific state where the rotational speed of the engine is greater than said reference speed to produce a third electrical signal which indicates that the engine is in the second specific state; adjusting the timing of the sparks applied to the engine depending upon said calculated spark advance angle; and in response to said second and third electrical signals, only when the engine is in the first specific state but not in the second specific state, keeping the timing of the sparks applied to the engine at a predetermined fixed timing.