Air/fuel induction system for a multi-cylinder internal combusti

Details Air/fuel induction system for a multi-cylinder internal combusti Air/fuel induction system for a multi-cylinder internal combusti

1983-11-28

1985-10-08

Cross, E. Rollins

Internal-combustion engines

Combustion chamber means having fuel injection only

Using multiple injectors or injections

123527, 123448, 123478, F02B 300

Patent

active

045453454

ABSTRACT:
An air/fuel induction system includes a pair of solenoid valves injecting fuel into an induction passage of a multi-cylinder engine. The valves supply fuel upstream of the inlet manifold to the engine and do not therefore direct fuel to specific cylinders. The solenoids (36, 36a) operate alternatively through pulses developed by drive units controlled by a microprocessor-based control unit (19). Each valve is independently timed by a respective timer-counter (44, 45) and valve operation overlaps in some circumstances. This allows smaller valves to be used and overcomes the problem of gusting at low speeds. The system may be applied to an LPG fuel system used as an additional fuel supply.

REFERENCES:
patent: 3780711 (1973-12-01), Lindberg
patent: 3971348 (1976-07-01), Scofield
patent: 4002152 (1977-01-01), Hoshi
patent: 4167925 (1979-09-01), Hosaka et al.
patent: 4168679 (1979-09-01), Ikeura et al.
patent: 4204507 (1980-05-01), Casey et al.
patent: 4226215 (1980-10-01), Kobayashi et al.
patent: 4407251 (1983-10-01), Nakanishi
patent: 4421087 (1983-12-01), Schuurman
patent: 4430978 (1984-02-01), Lewis et al.

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