초록 ▼

A method and a system is disclosed for controlling ignition timing in an internal combustion engine having a throttle valve and an intake air control valve independent of said throttle valve. Ignition timing is controlled in synchronism with the on-off operation of the intake air control valve. A ch

A method and a system is disclosed for controlling ignition timing in an internal combustion engine having a throttle valve and an intake air control valve independent of said throttle valve. Ignition timing is controlled in synchronism with the on-off operation of the intake air control valve. A change in the ignition timing is delayed by a predetermined period of time corresponding to a delay time in completing the on-off operation of the intake air control valve so that the optimum ignition timing is obtained at the proper time.

대표청구항 ▼

A method for controlling ignition timing in an internal combustion engine having a throttle valve and an intake air control valve independent of said throttle valve, in which the ignition timing is controlled in synchronism with the operation of the intake air control valve, comprising: determining

A method for controlling ignition timing in an internal combustion engine having a throttle valve and an intake air control valve independent of said throttle valve, in which the ignition timing is controlled in synchronism with the operation of the intake air control valve, comprising: determining whether or not there exist conditions where said intake air control valve is to be on-off operated; controlling the operation of said intake air control valve when it is determined there exists a condition where said intake air control valve is to be on-off operated; delaying a change in the timing of the ignition timing by a predetermined period of time corresponding to a delay time in effecting the on-off operation of said intake air control valve; and changing the ignition timing in accordance with the on-off condition of said intake air control valve upon the end of said predetermined period of time.