Fuel injection system for an internal combustion engine

Details Fuel injection system for an internal combustion engine Fuel injection system for an internal combustion engine

1983-11-07

1987-03-17

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

With fuel pump

123357, 123447, 239585, F02M 3900

Patent

active

046498869

ABSTRACT:
A fuel injection system for an internal combustion engine includes sensors for sensing the reference rotational position of the engine, a unit injector for compressing the fuel and injecting a predetermined amount of the fuel, and an electronic control device. The unit injector includes an actuator such as a piezoelectric actuator, a piston, and an injection valve. The piezoelectric actuator comprises a columnar laminated body of disk-shaped piezoelectric elements. The laminated body is expanded or compressed in the axial direction of the column according to the application of a positive or a negative high voltage. The electronic control device controls the frequency of the voltage supplied to the actuator during the period from the timing of a reference rotational position and controls, accordingly, the amount of fuel injection in accordance with the frequency of the voltage supplied to the actuator.

REFERENCES:
patent: 2997994 (1961-08-01), Falberg
patent: 3418980 (1968-12-01), Benson
patent: 3500799 (1970-03-01), Benson
patent: 3738576 (1973-06-01), O'Neill
patent: 3753426 (1973-08-01), Lilley
patent: 3983855 (1976-10-01), Jarrett
patent: 4073276 (1978-02-01), Nicolls
patent: 4333434 (1982-06-01), Brunais

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