China-Made New Diesel Fuel Electronic Unit Pump 0 414 755 008 0414755008 Auto Engine Parts

The unit pump is mainly used to generate the injection pressure of the injector (or injector), so as to spray the fuel into the engine combustion chamber at a certain pressure and state, so that the fuel and air form a combustible mixture to achieve normal combustion and operation of the engine. The following are the specific functions of the unit pump:

Generate high-pressure fuel: The unit pump compresses the fuel from the low-pressure oil circuit through the reciprocating motion of the plunger to generate high-pressure fuel that can meet the working requirements of the injector. For example, in a diesel generator set, the electronically controlled unit pump can increase the fuel pressure to about 1.6×10⁹Pa.

Accurately control the injection: The solenoid valve of the unit pump can accurately control the start time, duration and injection amount of the injection under the control of the electronic control unit (ECU). According to the different working conditions of the engine, such as idling, acceleration, full load, etc., the ECU will instruct the unit pump to adjust the injection parameters so that the engine can maintain good performance and fuel economy under various working conditions and reduce emissions.

Ensure uniform fuel supply to each cylinder: In a multi-cylinder engine, each cylinder is equipped with a unit pump. They can ensure the uniformity of fuel supply between cylinders, so that the fuel and air in each cylinder can be fully and evenly mixed and burned, ensure the balance of power output of each cylinder of the engine, reduce the vibration and noise of the engine, and improve the overall stability and reliability of the engine.

Adapt to different working conditions: The single pump can quickly adjust the output fuel pressure and injection amount according to the changes in the engine speed, load and other working conditions. For example, when the engine is running at high load, more fuel is provided to meet the power demand; when idling or light load, the fuel supply is reduced to avoid fuel waste.

Improve combustion efficiency: Because the single pump can accurately control the timing and amount of fuel injection, the fuel can be burned more fully and more reasonably in the combustion chamber. The more fully the fuel burns, the higher the thermal efficiency of the engine, which can output more effective power, while reducing the emission of unburned fuel and reducing pollution to the environment.

Fault diagnosis and protection: Some electronically controlled single pumps are equipped with fault diagnosis and protection functions. It can monitor the working status of the fuel supply system, such as detecting parameters such as fuel pressure and flow, and send out alarm signals when abnormal situations occur, and take corresponding protective measures, such as limiting engine power, cutting off fuel supply, etc., to prevent the engine from being damaged due to fuel system failure and improve the reliability and safety of the entire system.