Fluid sprinkling – spraying – and diffusing – Unitary injection nozzle and pump or accumulator plunger – Plunger interconnected or mounted bypass
Patent
1979-02-09
1981-07-21
Saifer, Robert W.
Fluid sprinkling, spraying, and diffusing
Unitary injection nozzle and pump or accumulator plunger
Plunger interconnected or mounted bypass
239 88, F02M 3202, F02M 4702
Patent
active
042793858
ABSTRACT:
A hydraulically driven piston pump and nozzle assembly for a high pressure fuel injection system is proposed, in particular one for Diesel engines, which has an assembly for raising the closing pressure for the purpose of accomplishing a rapid valve needle closing at the injection nozzle. The assembly substantially comprises a closing pressure chamber disposed in the region of the valve needle end remote from the valve seat, which chamber communicates via an overflow channel with an auxiliary pump chamber of an auxiliary pump piston which is driven together with the pump piston. At the termination of fuel delivery, fuel under increased pressure is conducted from the auxiliary pump chamber into the closing pressure chamber, from when this pressure is exerted, at least indirectly, upon the valve needle to cause an accelerated valve needle closing.
REFERENCES:
patent: 2279010 (1942-04-01), Nichols
patent: 3831846 (1974-08-01), Perr et al.
patent: 4069800 (1978-01-01), Kanda et al.
patent: 4170974 (1979-10-01), Kopse et al.
Straubel Max
Voit Willi
Greigg Edwin E.
Robert & Bosch GmbH
Saifer Robert W.
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