System for controlling fuel injection for multiple-displacement

Details System for controlling fuel injection for multiple-displacement System for controlling fuel injection for multiple-displacement

1983-05-13

1985-09-17

Lazarus, Ira S.

Internal-combustion engines

Charge forming device

Fuel injection system

123198F, F02D 1700

Patent

active

045413878

ABSTRACT:
A system for controlling fuel injection for a multiple-displacement engine in which the number of operating cylinder changes according to the load on the engine by cutting off fuel to some of cylinders. The engine has solenoid-operated fuel injection valves and a switch is provided for rendering each solenoid-operated fuel injection valve inoperative. A sensor is provided for detecting load on the engine and for producing an output dependent on the load. A fuel injection control circuit is responsive to the output of the sensor for operating the switches to cut off the fuel to the corresponding cylinder. The fuel injection control circuit is so arranged to cut off the fuel to cylinders in accordance with idle cylinder patterns which are such that particular cylinders are not repeatedly idled and such that the number of idling cylinders by the fuel cut-off decreases with an increase of the load on the engine.

REFERENCES:
patent: 2771867 (1956-11-01), Peras
patent: 3756205 (1973-09-01), Frost
patent: 4040395 (1977-08-01), Demetrescu
patent: 4061055 (1977-12-01), Iizuka et al.
patent: 4144864 (1979-03-01), Kato et al.
patent: 4194417 (1980-03-01), Kato et al.
patent: 4204514 (1980-05-01), Ishida
patent: 4276863 (1981-07-01), Sugasawa et al.
patent: 4391255 (1983-07-01), Staerzl
patent: 4398520 (1983-08-01), Schulz et al.

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