초록 ▼

A device for temporarily changing the ignition setting of an internal combustion engine in response to a sudden change of the suction in the intake manifold. A suction operated motor is connected to the ignition timing mechanism to control the suction operated timing of the ignition in response to i

A device for temporarily changing the ignition setting of an internal combustion engine in response to a sudden change of the suction in the intake manifold. A suction operated motor is connected to the ignition timing mechanism to control the suction operated timing of the ignition in response to intake manifold suction changes. The action of the motor is controlled for a selected time interval to reduce the suction operated spark advance for a substantial portion of a normal level road acceleration in city driving as sensed by the change in intake manifold suction.

대표청구항 ▼

In an internal combustion engaging provided with a throttle valve, an intake manifold providing a source of suction, the amount of suction being controlled by the throttle position, ignition spark means normally biased to retard timing at closed position of the throttle, and control means operative

In an internal combustion engaging provided with a throttle valve, an intake manifold providing a source of suction, the amount of suction being controlled by the throttle position, ignition spark means normally biased to retard timing at closed position of the throttle, and control means operative to overcome said bias to advance the spark timing by increasing suction from the source in response to gradual throttle movement at a rate below a predetermined rate, the improvement comprising: suction change sensitive means responsive to a selected one of either a sudden increase or a sudden decrease in suction at the source in response to sudden movement of the throttle valve greater than the predetermined rate for rendering the control means inoperative to overcome said bias, to permit return of the ignition spark means to retarded timing, said suction change sensitive means including means for maintaining the control means inoperative for an appreciable period of time much longer than the time during which the abrupt change in suction took place whether such change be an increase or a decrease of suction at the source.