Internal-combustion engines – Charge forming device – Auxiliary air or gas used to inject fuel
Patent
1984-06-05
1984-12-25
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Auxiliary air or gas used to inject fuel
123432, F02M 1700, F02M 2300
Patent
active
044897014
ABSTRACT:
A method and a fuel supply system for supplying fuel to a mixture-compressing internal combustion engine with externally supplied ignition. The fuel supply system includes a nozzle having a flow cross section of a nozzle-like body which discharges into the intake tube. Compressed air furnished by a compressed air source enters through this flow cross section in the intake tube at a pressure such that at the narrowest point or throat area of the nozzle the air attains sonic speed. A fuel delivery line also discharges at the narrowest point or throat area of the nozzle, and fuel metered in accordance with engine operating characteristics is carried via this fuel delivery line downstream of a fuel metering valve. The quantity of air flowing through the nozzle should be a partial flow of the aspirated air quantity; for instance, it should not be greater than the idling air quantity of the engine, so that at little expense, a continuous flow of air through the nozzle can be effected at sonic speed. As a result, optimal preparation of the metered fuel occurs and no additional differential pressure valve is required at the fuel metering valve.
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Greigg Edwin E.
Nelli Raymond A.
Robert & Bosch GmbH
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