Fuel supply system for internal combustion engines

Details Fuel supply system for internal combustion engines Fuel supply system for internal combustion engines

1988-11-21

1989-11-07

Cross, E. Rollins

Internal-combustion engines

Charge forming device

Combined liquid and gaseous fuel

123577, 123576, F02B 100

Patent

active

048784753

ABSTRACT:
A fuel supply system for internal combustion engines in which two different fuels are used, one to start the engine, to operate it at idling speed and to supplement the other fuel during acceleration, and the second to operate the engine at its normal working speed. The first fuel may be propane for starting, idling and for an acceleration supplement. The second fuel for normal working speed, or normal driving speed may be gasoline. A first vacuum controlled valve assembly delivers the first fuel such as propane from a pressurized supply tank to the carburetor below the conventional butterfly valve of the throttle control to start the engine and operate it at idle speed. A second vacuum controlled valve assembly delivers the first fuel, such as propane, to the carburetor above the butterfly valve only when the accelerator opens the throttle and its butterfly valve to initiate acceleration, and only during acceleration. The second fuel such as gasoline which is used for the normal working or driving operation is supplied to the engine in the usual manner, from its supply tank to the carburetor by a fuel pump, and from the carburetor through the intake manifold to the combustion chambers by the vacuum created as the engine operates.

REFERENCES:
patent: 4068639 (1978-01-01), Cook
patent: 4335697 (1982-06-01), McLean
patent: 4369751 (1983-01-01), Batchelor
patent: 4373493 (1983-02-01), Welsh

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