Diesel fuel distributor type injection pump

Details Diesel fuel distributor type injection pump Diesel fuel distributor type injection pump

1982-09-13

1983-11-01

Lazarus, Ira S.

Internal-combustion engines

Charge forming device

Fuel injection system

123500, 123458, 123459, 417500, F02M 4100

Patent

active

044125194

ABSTRACT:
The reciprocating plunger reciprocable in the pump cylinder of a distributor type diesel fuel injection pump is helically splined to an index ratchet gear that is also operatively associated with a pawl detent whereby the index ratchet gear is rotatable in only one direction. The plunger has a discharge slot on its outer peripheral surface which registers with one of the plural discharge ports opening from the pump cylinder and the plunger controls the covering and uncovering of a fuel inlet port to the pump cylinder. Upon a pump stroke of the plunger, the index ratchet gear is rotated so that the next adjacent tooth is brought into alignment with the pawl detent to then prevent its rotation in the opposite direction during the suction stroke of the plunger.
With the index ratchet gear thus fixed, the plunger is thus rotated on the suction stroke so as to align the discharge slot with the next adjacent discharge port. A normally open solenoid valve controls spill flow from the pump cylinder during a pump stroke of the plunger so as to control the start and end of fuel injection.

REFERENCES:
patent: 1664608 (1928-04-01), French
patent: 2147390 (1939-02-01), Vaudet
patent: 2535535 (1950-12-01), Fleck
patent: 4197058 (1980-04-01), Simko
patent: 4241714 (1980-12-01), Knape et al.

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