Fuel injection system and timing advance device therefor

Details Fuel injection system and timing advance device therefor Fuel injection system and timing advance device therefor

1982-05-18

1983-12-13

Myhre, Charles J.

Internal-combustion engines

Charge forming device

With fuel pump

123508, 123 9012, 239 90, 239 95, F02M 3902, F02M 4702

Patent

active

044199775

ABSTRACT:
A hydraulic advance device for selectively transmitting applied forces to a fuel injector of an internal combustion engine. The device is operative to select a normal or advanced timing of the fuel injection. An outer cylindrical body (66) is mounted in the upper end of a fuel injector adapter. An inner body (108) is slidably received in an outer body and a pressure responsive plunger (104) is slidably received in a bore formed in the inner body and defines in cooperation therewith a fluid chamber (128). A one-way valve (132) in the chamber permits fluid above a predetermined pressure applied during the advanced stage of the fuel injection cycle to enter the chamber which prevents movement of the plunger relative to the inner body member. At pressures below a predetermined value and during the normal phase of the fuel injection cycle, the plunger first moves relative to the inner body a predetermined amount during which time no movement is transferred to the inner body thus delaying fuel injection relative to advance phase fuel injection.

REFERENCES:
patent: 2840063 (1958-06-01), Porchas
patent: 3786792 (1974-11-01), Pelizzoni
patent: 3859973 (1975-01-01), Dreisin
patent: 3967602 (1976-07-01), Brown
patent: 4164917 (1979-08-01), Glasson
patent: 4249499 (1981-02-01), Perr
S.A.E. Journal, Aug. 1942, "Some Results of Valve-Gear Research as Applied to Diesel Engines", Voorhies, Carl, pp. 358-371, in particular pp. 367-370 and FIG. 28.

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