Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Patent
1992-09-22
1993-11-16
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
123682, 123683, 123685, 123488, F02D 4114
Patent
active
052613828
ABSTRACT:
An electronic fuel injection system operable as a bolt on retro fit replacement for a wide variety of carburetors is disclosed. The system includes a throttle body-injector assembly which, by means of an adapter may be bolted directly to stock intake manifolds using the carburetor mounting bolt holes in the manifold. The throttle body passages and injectors are designed to meet the fuel and air delivery requirements of large displacement engines and an electronic control unit which controls the solenoid actuated injectors in a duty cycle operation is provided with externally accessible adjustments by means of which the system may be adjusted to tune the rate of fuel injection to the fuel delivery requirements of engines of displacements much smaller than the largest displacement engine within the systems capability. The system may be independently adjusted for optimum or user selected economy or power operation at idle, mid range and high rpm engine operation and further includes choke and accelerating enrichment adjustments. A closed loop circuit is operatively combined with the electronic fuel injection system and has an engine exhaust gas oxygen sensor for effectively indicating stoichiometric fuel-air mixtures supplied to the engine. The closed loop circuit is effective to both increase or decrease the rate of metered fuel flow as to be at or about the stoichiometric point. The closed loop circuit automatically converts to open loop operation upon receiving appropriate inputs.
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patent: 5152270 (1992-10-01), Miyamoto
Coltec Industries Inc.
Reiter Howard S.
Wolfe Willis R.
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