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An apparatus and method for determining the current waveform of a fuel injection signal so as to consistently control the amount of fuel injected by an electronically controlled hydraulic actuator unit injector fuel system to an engine is disclosed. The apparatus and method varies the waveform of a

An apparatus and method for determining the current waveform of a fuel injection signal so as to consistently control the amount of fuel injected by an electronically controlled hydraulic actuator unit injector fuel system to an engine is disclosed. The apparatus and method varies the waveform of a fuel injection signal using equations or look-up maps and based on sensed operating parameters, which preferably include a desired speed of the engine or desired fuel quantity to be injected during an injection event, actuating fluid pressure and engine speed.

대표청구항 ▼

[ We claim:] [1.] A compression engine having an electronic control system, comprising:a hydraulically actuated electronic unit fuel injector mounted to the engine, capable of producing an injection event capable of having sub-events and connected to a source of actuating fluid;an electronic control

[ We claim:] [1.] A compression engine having an electronic control system, comprising:a hydraulically actuated electronic unit fuel injector mounted to the engine, capable of producing an injection event capable of having sub-events and connected to a source of actuating fluid;an electronic controller electrically connected to said hydraulically actuated electronic unit fuel injector;an engine speed sensor producing an engine speed signal responsive to a speed of said engine and communicating the engine speed signal to the controller;a throttle producing a desired speed signal being indicative of a desired speed of the engine and communicating the desired speed signal to the controller;a pressure sensor associated with the actuating fluid, electrically connected to the electronic controller, producing a pressure signal responsive to a pressure of the actuating fluid and communicating the pressure signal to the controller; andwherein said electronic controller delivers to said hydraulically actuated electronic unit fuel injector a fuel injection signal having one or more of a plurality of waveforms for controlling the sub-events and being generated from one or more of a plurality of fuel delivery maps as a function of the desired speed of the engine, the engine speed signal and the pressure signal.