Diesel fuel injection pump with electronically controlled fuel s

Details Diesel fuel injection pump with electronically controlled fuel s Diesel fuel injection pump with electronically controlled fuel s

1984-09-13

1986-01-14

Moy, Magdalen Y. C.

Internal-combustion engines

Charge forming device

Fuel injection system

123459, F02M 4100

Patent

active

045639922

ABSTRACT:
A fuel injection pump for a diesel engine includes a housing having a bore within which a plunger reciprocates according to the operation of the engine, the bore defining a pumping chamber at an end of the plunger. The pumping chamber is communicated to a fuel intake passage only when the plunger is moving in a direction to enlarge the size of the pumping chamber and being communicated to fuel injection nozzles only when the plunger is moving in a direction to reduce the size of the pumping chamber. A first electromagnetic valve for fuel shutoff is provided at a middle portion of the fuel intake passage. A second electromagnetic valve, advantageously used also for fuel amount control by timely venting the pumping chamber in its compression stroke, communicates the pumping chamber to the intake passage downstream of the first electromagnetic valve for at least a predetermined short time period when the first electromagnetic valve is closed.

REFERENCES:
patent: 1664608 (1928-04-01), French
patent: 4385614 (1983-05-01), Eheim et al.
patent: 4395987 (1983-08-01), Kobayashi et al.
patent: 4412519 (1983-11-01), Hoch et al.
patent: 4458648 (1984-07-01), Braun et al.
patent: 4480619 (1984-11-01), Igashira et al.

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