Variable discharge high pressure pump

Details Variable discharge high pressure pump Variable discharge high pressure pump

1991-05-14

1993-03-30

Miller, Carl S.

Internal-combustion engines

Charge forming device

With fuel pump

123456, 123446, F02M 3704

Patent

active

051974380

ABSTRACT:
A variable discharge high pressure pump for pumping a fuel into a common rail of a common rail type fuel injection system has a plunger reciprocable in a cylinder bore and a pumping chamber defined between and end face of the plunger and the inner peripheral surface of the cylinder bore. A solenoid valve has a valve member movable into an open position in which the valve member is moved out of engagement with an associated valve seat into the pumping chamber when the solenoid valve is deenergized. When the solenoid valve is energized, the valve member is moved into a closed position in which the fuel pressure in the pumping chamber acts on the valve member to urge the same into engagement with the valve seat. The plunger is of a simple cylinderical structure free from any lead formed therein.

REFERENCES:
patent: 3407746 (1968-10-01), Johnson
patent: 4222714 (1980-09-01), Dantlgraber
patent: 4279573 (1981-07-01), Rychlik
patent: 4385614 (1983-05-01), Eheim
patent: 4459963 (1984-07-01), Gross
patent: 4479475 (1984-10-01), Baditzka
patent: 4583510 (1986-04-01), Schechter
patent: 4586480 (1986-05-01), Kobayashi
patent: 4586656 (1986-05-01), Wich
patent: 4777921 (1988-10-01), Miyari
patent: 4841936 (1989-06-01), Takahashi

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