Study of development of the electronically controlled fuel injection system of heavy duty diesel engine for vehicle

On the basis of the former mechanically controlled fuel injection system of 6V150 diesel engine,the electronically controlled fuel injection system had been developed,then the electronic control of fuel injection quantity had been achieved. The high speed digital solenoid valve was used as the key component of the electro hydraulic actuator,the MC68HC11E2 single chip microprocessor was used as the kernel of the electronic control unit(ECU). On the basis of the close loop control of the position of the fuel feeding toothed rod of the fuel pump,the close loop control of the engine speed had been achieved.When the electronically controlled fuel injection system was matched with the 6V150 diesel engine, the monitoring and tune up system was developed to meet the demand of matching. The electronically controlled fuel injection system was matched with the 6V150 diesel engine, and the test result is satisfying.