Liquefied propane carburetor modification system

Patent · Tue Jan 25 04:00:00 EST 1983

OSTI ID:6339183

Batchelor, D R; Batchelor, W H

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.

• Assignee: Ayres Tech Inc
• Patent Number(s): US 4369751
• OSTI ID: 6339183
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
330800 -- Emission Control-- Alternative Fuels
ALKANES
AUTOMOBILES
DESIGN
ENGINES
FUEL SUBSTITUTION
FUEL SYSTEMS
HEAT ENGINES
HYDROCARBONS
INTERNAL COMBUSTION ENGINES
LIQUEFIED GASES
ORGANIC COMPOUNDS
PROPANE
VEHICLES