Electromagnetic unit fuel injector

Details Electromagnetic unit fuel injector Electromagnetic unit fuel injector

1977-09-12

1978-12-12

Blunk, Evon C.

Fluid sprinkling, spraying, and diffusing

Injection nozzle opened by relieving supply

123139AK, 123139E, 239 58S, F02M 4702, F02M 5500

Patent

active

041292561

ABSTRACT:
An electromagnetic unit fuel injector for use in a diesel engine has a pump, provided by a cam actuated plunger reciprocable in a bushing, for intensifying the pressure of fuel delivered to a spring biased closed, pressure actuated injection valve controlling flow discharge out through a spray outlet, to a pressure accumulator and through a throttling orifice passage into one end of a modulation pressure control chamber having an enlarged diameter stem portion of the injection valve therein, the modulation pressure control chamber downstream of the throttling orifice passage being connected by a conduit including a solenoid actuated valve controlling metering orifice with a low pressure fuel drain return line whereby the pressure of fuel in the modulation pressure control chamber acting on the enlarged diameter stem portion of the injection valve is modulated so as to control the seating and unseating of the injection valve.

REFERENCES:
patent: 3006556 (1961-10-01), Shade et al.
patent: 3464627 (1969-09-01), Huber
patent: 3777977 (1973-12-01), Regneault et al.

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