Metering valve for metering a fluid

Details Metering valve for metering a fluid Metering valve for metering a fluid

1996-01-02

1997-12-16

Morris, Lesley D.

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

239584, F02M 5106

Patent

active

056975546

ABSTRACT:
A metering valve for metering a fluid for a fuel injection valve for internal combustion engines, with a hydraulic displacement amplifier for converting the actuating displacement of a piezoelectric actuator into an increased stroke of the valve needle. Integrating the displacement amplifier spatially into the valve housing in an "O valve" to give a small overall volume is served by providing the lifting piston of the displacement amplifier with an end section of reduced diameter which projects into a recess in the operation piston of the displacement amplifier. A Belleville spring lying in the amplifier chamber bounded by the pistons presses the operating piston against the actuator, and a helical compression spring arranged in the recess concentrically to the end section presses the lifting piston against the valve needle.

REFERENCES:
patent: 4022166 (1977-05-01), Bart
patent: 4544096 (1985-10-01), Burnett
patent: 5452858 (1995-09-01), Tsuzuki et al.
patent: 5495957 (1996-03-01), Sturman

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