High Quality Diesel Head Rotor 146403-4220 VE Pump Parts Rotor Head Spare Part

In order to ensure the normal operation of the diesel pump, most plunger pumps are equipped with a diesel delivery valve, which is extremely important in mechanical fuel systems. The diesel delivery valve and its valve seat form a pair. When the plunger moves upward, when the fuel reaches After the pressure is turned on, the diesel outlet valve opens, and the high-pressure fuel generated by the diesel pump is transported to the injector through the high-pressure diesel pipe for fuel injection. When the plunger goes down, the diesel outlet valve closes quickly to ensure that there is a certain pressure of fuel in the high-pressure diesel pipe for the next injection. At the same time, the pressure of the high-pressure diesel pipe cannot be too high to prevent the injector from producing secondary injection. Therefore, in the mechanical fuel system, the design of the diesel outlet valve is extremely critical. Its pressure reduction capability and flow characteristics affect the working process and performance indicators of the engine. Very big. The common rail fuel system separates the pressure diesel and injection. The high-pressure diesel pump no longer controls the injector injection, and the importance of the diesel outlet valve is weakened. The simplest ball valve structure is often used, and its function is during the plunger suction process. Cutting off the high-pressure fuel in the common rail pipe and the pressure accumulation chamber causes the pressure in the plunger chamber to drop rapidly, absorbing diesel more fully and reducing fuel leakage from the plunger. Except for the diesel delivery valve volume, which has a certain impact on the average diesel supply flow of the high-pressure diesel pump, the other parameters have basically no impact. However, among the other parameters, the diesel delivery valve diameter and the diesel delivery valve seat taper have an impact on the diesel delivery valve displacement and diesel delivery valve flow. There is a certain impact.