High pressure diesel fuel injector for internal combustion engin

Details High pressure diesel fuel injector for internal combustion engin High pressure diesel fuel injector for internal combustion engin

1994-08-02

1995-08-22

Shaver, Kevin P.

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

Plunger interconnected or mounted bypass

123446, F02M 5500

Patent

active

054432090

ABSTRACT:
A fuel injector including a housing having a fuel passage connectable at one end to a source of fuel for the ingress or egress of fuel at a suitable supply pressure, a fuel supply chamber in flow communication with the fuel passage, a pump cylinder in the housing, an externally actuated plunger reciprocable in the pump cylinder at a predetermined clearance therewith and defining at one end thereof a pump chamber open at one end for the discharge of fuel during a pump stroke and for fuel intake during a suction stroke of said plunger. The plunger includes a piston and a push rod concentrically located within the piston along an axis thereof, and fixed thereto to preclude relative axial movement along such axis. The push rod includes a head portion extending beyond one end of the piston to be engaged by a plunger actuator to cause a pumping stroke under force, and a stem portion in radial clearance with the piston and engaging the piston at the other end of the piston whereby the force of the plunger actuator is transferred by the push rod directly and only to the other end of the piston, thus precluding placing the said one end of the piston under compression and thereby maintaining the predetermined clearance between the plunger and the housing.

REFERENCES:
patent: 3351288 (1967-11-01), Perr
patent: 4082072 (1978-04-01), Johnson
patent: 4378774 (1983-04-01), Kato
patent: 4392612 (1983-07-01), Deckard et al.
patent: 4527738 (1985-07-01), Martin
patent: 4618095 (1986-10-01), Spollstra
patent: 4911127 (1990-03-01), Perr

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