Electronic and mechanical fuel supply system

Details Electronic and mechanical fuel supply system Electronic and mechanical fuel supply system

1985-02-15

1987-08-04

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123198D, 123479, 123472, F02M 5100, F02B 7700

Patent

active

046838546

ABSTRACT:
An electronic and mechanical fuel feeding system comprises a mechanical fuel induction system coupled with an electronic fuel injection system through a diverter valve in fluid communication with a mechancial pump. The diverter valve includes a valve actuator responsive to an electrical signal to couple the inlet of the diverter valve with the outlet of the valve connected in fluid communication with electronically controlled injector nozzles. Alternatively, absence of an electrical control signal at the valve actuator causes coupling of the inlet of the diverter valve to a second outlet coupled in fluid communication with a mechanical carburetion system. In the preferred embodiment, the electronic fuel injection system comprises a control circuit responsive to changes in engine speed, manifold pressure, exhaust gas temperature and cylinder temperature so that accurately metered amounts of fuel are delivered by the injector nozzles to the engine cylinders. Since the amount of fuel supplied to the injector nozzles by a mechanical pump may exceed the amount necessary to efficiently operate the engine, a fuel return line downstream of the injector nozzles returns excess fuel to the fuel tank through a restricted orifice to prevent excess depletion of fuel at the injector nozzles.

REFERENCES:
patent: 3022053 (1962-02-01), Hoyt
patent: 3834361 (1974-09-01), Keely
patent: 4065920 (1978-01-01), Minami et al.
patent: 4144850 (1979-03-01), Asaka et al.
patent: 4291532 (1981-09-01), Robinson
patent: 4305350 (1981-12-01), Brown et al.
patent: 4404945 (1983-09-01), Fujikawa
patent: 4424785 (1984-01-01), Ishida et al.
patent: 4452207 (1984-06-01), Moore, Jr.

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