Internal-combustion engines – Charge forming device – Diverse fuel supply
Patent
1986-10-09
1987-11-03
Cross, E. Rollins
Internal-combustion engines
Charge forming device
Diverse fuel supply
123527, F02B 700
Patent
active
047037423
ABSTRACT:
An air-gas mixing device of the type used to mix air and gaseous fuel as a gaseous fuel charge for an internal combustion engine and particularly suitable for use with engines operating generators and the like at constant speed. Fuel and air valves for controlling the air/fuel mixture are coupled together and actuated by a fluid motor in response to a fluid pressure signal, derived from the intake manifold pressure of the engine, acting on the diaphragm of the fluid motor. The fuel valve is also independently actuated by a second fluid motor, mounted to the diaphragm of the first fluid motor, in response to ambient air pressure which is applied to the second fluid motor upon a sudden increase in engine load demand to enlarge the opening of the fuel valve and thereby enrich the air/fuel mixture to prevent a significant falloff in engine speed. Because of the dual control of the fuel valve, the device is capable of providing a more optimum lean air/fuel mixture for better fuel economy and emissions control during normal operating conditions while being able to quickly enrich the fuel mixture in response to sudden increases in load demand.
REFERENCES:
patent: 2856599 (1959-07-01), Ensign
patent: 3545948 (1970-12-01), Baverstock
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patent: 3846094 (1974-11-01), Baverstock
patent: 4020810 (1977-05-01), Baverstock
patent: 4098248 (1978-07-01), Todd
patent: 4449509 (1984-05-01), Young
patent: 4513727 (1985-04-01), Lagano et al.
Cross E. Rollins
Impco Carburetion, Inc.
Seeman Thomas A.
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