Fuel injection nozzle for internal combustion engines

Details Fuel injection nozzle for internal combustion engines Fuel injection nozzle for internal combustion engines

1985-06-05

1987-02-10

Wolfe, Jr., Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

2395333, 2395334, F02M 5702

Patent

active

046416218

ABSTRACT:
A fuel injection nozzle for internal combustion engines comprises a nozzle needle being supported in a casing and adapted for obturating the orifices of the nozzle under spring pressure and for opening them under fuel pressure. An abutment which is adjustable in that it reduces the length of the opening stroke of the injection needle when the internal combustion engine operates in a speed range from idling speed to at most a medium speed and under a small load, can be actuated by means of a spring-biased piston urged upon by a pressure medium. In order to guarantee a continuous adjustability of the abutment, the pressure medium acting upon the piston is fed via a pressure-regulating valve, and a control unit, influenced at least by the engine speed and load prevailing at any given time, is provided for controlling this pressure-regulating valve. The piston is arranged in a cylinder having an axis which intersects the axis of the nozzle needle at a first angle slightly deviating from 90.degree.. The abutment is devised as a flattened part of the piston skirt extending in a plane which intersects a plane normal relative to the piston axis at an angle having the same size as the first angle, but opening in a direction opposite to that in which the first angle opens.

REFERENCES:
patent: 4092001 (1978-05-01), Hofmann
patent: 4136654 (1979-01-01), Kulke et al.
patent: 4501245 (1985-02-01), Taira
patent: 4528951 (1985-07-01), Yamada

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