Internal-combustion engines – Charge forming device – Gaseous fuel and air mixer
Patent
1980-08-13
1983-01-25
Lazarus, Ira S.
Internal-combustion engines
Charge forming device
Gaseous fuel and air mixer
123525, 123489, 48180C, F02B 4300
Patent
active
043697518
ABSTRACT:
A system which can be retrofit into an existing conventional gasoline powered vehicle for enabling the vehicle to operate on either gasoline or liquefied propane fuel. The system includes a mixer in the form of an adapter to fit on the top of an existing carburetor. The mixer has a unique spring balanced metering device which controls flow of gaseous propane to the carburetor in proportion to airflow through the carburetor. The mixer is connected to a regulator assembly which receives liquid propane in a first chamber, heats the liquid propane to form a vapor, and feeds the vapor through an idle valve to control idling of the engine. The vapor is also passed to a second chamber of the regulator assembly in response to demand from the metering device which is sensed by a diaphragm actuated gas flow valve. From the second chamber, the gaseous propane is fed to a high speed inlet of the mixer. Engine manifold vacuum is also used to provide additional control for the gas flow valve to increase efficiency of the system. Other features include a special purpose fuel tank and an optional exhaust system oxygen sensor for further regulating gas flow to the engine.
REFERENCES:
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patent: 3114357 (1963-12-01), Mortin et al.
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patent: 4063905 (1977-12-01), Johnson et al.
patent: 4150562 (1979-04-01), Nielsen
Batchelor Douglas R.
Batchelor William H.
Ayres Technologies, Inc.
Cross E. Rollins
Jacobson Harvey B.
Lazarus Ira S.
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