Internal-combustion engines – Charge forming device – Diverse fuel supply
Patent
1983-01-28
1985-02-19
Cross, E. Rollins
Internal-combustion engines
Charge forming device
Diverse fuel supply
123 1A, 123179G, 123515, F02M 1304
Patent
active
044998872
ABSTRACT:
The dual fuel supply system for an internal combustion engine has a carburetor including a fuel/air induction passage having means defining a low pressure zone and a secondary orifice and further including a cavity communicating with the fuel induction passage through the secondary orifice. A first or primary fuel supply includes a first float bowl connected to a source of a primary fuel, such as kerosene, a first float controlled valve operable to control the supply of the primary fuel to the first float bowl, a fuel nozzle for supplying the primary fuel from the first float bowl to the low pressure zone, and a conduit connecting the first float bowl in communication with the carburetor cavity. The second or secondary fuel supply includes a second float bowl communicable with the carburetor cavity and connected to a source of a second or secondary fuel, such as gasoline, and a second float controlled valve operable to control the supply of the secondary fuel to the second float bowl. In one embodiment, the carburetor includes a throttle valve located downstream of the low pressure zone and a priming fuel port located downstream of the throttle valve. A primer pump having an inlet connected in communication with the priming fuel port can be operated to selectively introduce a quantity of the secondary fuel into the induction passage to facilitate engine starting.
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Billingsley Henry C.
Clark Amos M.
Cross E. Rollins
Outboard Marine Corporation
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