Unit injector for an internal combustion engine

Details Unit injector for an internal combustion engine Unit injector for an internal combustion engine

1987-08-12

1988-11-08

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

With fuel pump

123498, F02M 3900

Patent

active

047828072

ABSTRACT:
A unit injector for an internal combustion engine comprising a spill valve provided between a pressurizer unit and a nozzle unit. The spill valve, driven through a hydraulic amplification link by a piezoelectric actuator, slides in a cylindrical passage that transversely intersects a fuel supply path between the pressurizer unit and the nozzle unit to open and shut a spill port opening from the cylindrical passage into a return path. Fuel injection quantity is determined by opening the spill valve at a preselected point in the injection stroke of a reciprocating plunger in the pressurizer unit.

REFERENCES:
patent: 3465732 (1969-09-01), Kattchfe
patent: 3589345 (1971-06-01), Benson
patent: 4622942 (1986-11-01), Nozaki
patent: 4643155 (1987-02-01), O'Neill
patent: 4697565 (1987-10-01), Kobayashi

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