Control device for controlling air-fuel ratio and spark timing o

Details Control device for controlling air-fuel ratio and spark timing o Control device for controlling air-fuel ratio and spark timing o

1985-05-07

1986-05-13

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123417, 123480, F02P 500, F02B 2300

Patent

active

045879389

ABSTRACT:
A control device determining the air-fuel ratio in the leanest fashion or in the leaner fashion depending on the position of the throttle valve. The ignition timing is also determined in relation to the air-fuel ratio. The ignition timing is advanced when the air-fuel ratio is in the leanest fashion and the ignition timing is retarded with respect to the former timing when the air-fuel ratio is in the leaner fashion. The control device further causes a delay in change-over of the ignition timing between two timing patterns relative to the change-over of the air fuel ratio when the opening of the throttle valve is changed beyond the predetermined value.

REFERENCES:
patent: 4377996 (1983-03-01), Yamaguchi
patent: 4385606 (1983-05-01), Hettori et al.
patent: 4438741 (1984-03-01), Okumura et al.
patent: 4452204 (1984-06-01), Matsubaru
patent: 4478185 (1984-10-01), Obayashi et al.
patent: 4503822 (1985-03-01), Kobuyashi et al.

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