Fuel injection pump

Details Fuel injection pump Fuel injection pump

1982-09-22

1984-05-22

Lazarus, Ira S.

Internal-combustion engines

Charge forming device

Fuel injection system

123458, 123459, F02M 3900

Patent

active

044495030

ABSTRACT:
A fuel injection pump (100) including a plunger (2) and a piston (1) movably disposed in a pumping chamber (17), means for initiating (3, 5) fuel injection and means for terminating (13, 20, 29) fuel injection, the plunger periodically pressurizing fuel in a pressure chamber (44) and the piston (1) spaced from the plunger and allowing a metering chamber (16) to fill with a metered quantity of fuel to be injected to an engine. The means for initiating injection comprises a pilot valve (5) having a solenoid to selectively operate between either of two states and a control valve (3) movable between first and second positions in response to the state of pilot valve (5), the first position filling the metering chamber (16) with the metered quantity of fuel. The pilot valve (5) determines the fuel quantity to be delivered to the engine relative to a signal from an electronic controller. An accumulator (4) is pressurized during each cycle of the plunger (2) to provide pressurized fuel during a metering phase. A variable orifice (15) adjusts the rate of flow during the time fuel is being metered to metering chamber (16).

REFERENCES:
patent: 1974851 (1934-09-01), Hurst
patent: 3547092 (1970-12-01), Knight
patent: 3557764 (1971-01-01), Knight
patent: 3587547 (1971-06-01), Hussey et al.
patent: 3837324 (1974-09-01), Links
patent: 4106458 (1978-08-01), Kohler
patent: 4249497 (1981-02-01), Eheim et al.
patent: 4275693 (1981-06-01), Leckie
patent: 4343280 (1982-08-01), Luscomb

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