High Quality New Diesel Fuel Injection Pump Head Rotor 146400-2220 VE Head Rotor for Fuel Pump Engine Spare

The structure and working principle of the high-pressure diesel pump vary depending on the model. Each cylinder of the diesel engine is equipped with a separate plunger-type high-pressure diesel pump. The traditional diesel outlet valve is changed to an independent diesel suction valve and an independent air puncture valve for parking. Therefore, the main component of the diesel engine high-pressure diesel pump is Plunger sleeve parts, diesel suction valve parts and air piercing valve parts.

The advantage of the high-pressure diesel pump is that this structure can ensure that the diesel engine always uses fuel without changing the diesel in any navigation or parking state. In the parking state, the circulation of fuel can be used to preheat the diesel pump and injectors. This minimizes the workload of the engine crew. In an emergency, the diesel engine can be forced to stop by injecting control air into the air piercing valve.

The disadvantage of the high-pressure fuel pump is that this type of fuel injection pump does not have a fuel outlet valve. When the fuel supply ends, when the chute on the plunger opens the inlet/return hole D, the high-pressure fuel in the high-pressure fuel pipe will quickly flow back, which will cause the pressure in the diesel inlet/return space B fluctuates violently. In order to reduce the fluctuation of fuel diesel pressure during operation, a shock-absorbing cylinder must be installed on the high-pressure diesel pump body. This will make the structure of the high-pressure diesel pump complex and bulky. The pump body corresponding to the diesel inlet/return hole is equipped with a replaceable anti-corrosion cock to reduce the erosion and corrosion caused by fuel on the high-pressure diesel pump and pump body, and increase the service life of the high-pressure diesel pump.