Fuel injection apparatus

Internal-combustion engines – Charge forming device – With fuel pump

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Details

123458, 123494, F02M 3900

Patent

active

045467498

ABSTRACT:
In a fuel injection apparatus for an internal combustion engine, the fuel injection is ended by a spill mechanism provided in a spill passage communicating with a pumping chamber. A piston opening and closing the spill passage is a free piston, and a solenoid valve to open and close a cylinder in which the free piston is disposed, is also provided. As the solenoid valve closes the cylinder, the free piston closes the spill passage, thus enabling the fuel feed to the fuel injection valve. When the solenoid valve opens the cylinder, the free piston opens the spill passage. Thus, the fuel flows through the spill passage to the fuel reservoir.

REFERENCES:
patent: 3827409 (1974-08-01), O'Neill
patent: 3880131 (1975-04-01), Twaddell et al.
patent: 4199977 (1980-04-01), Hilpert
patent: 4351283 (1982-09-01), Ament
patent: 4395987 (1983-08-01), Kobayashi
patent: 4406267 (1983-09-01), Sharma
patent: 4412519 (1983-11-01), Hoch
patent: 4480619 (1984-11-01), Igashira
patent: 4505240 (1985-03-01), Shinoda

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