FAW Auto Parts Solenoid Valve

   The electromagnetic fuel cut-off valve on the diesel engine is the high-pressure fuel produced by the fuel supply pump, which is distributed to the fuel injectors of each cylinder through the common rail; The fuel pressure is detected by the sensor set in the common rail and fed back to the control system, and the actual pressure value and the preset pressure value corresponding to the engine speed and load are always consistent.
   When the plunger goes down, the control valve opens, and the low-pressure fuel flows into the column blocking cavity through the control valve; When the plunger goes up, but the control valve is not energized, the control valve is still open, and the sucked fuel is not boosted; The fuel flows back to the low pressure chamber through the control valve.
   At the same time, ECU calculates the time to meet the necessary fuel supply, timely supplies power to the control valve, opens it, cuts off the fuel return channel, and pressurizes the fuel in the column blocking chamber; Therefore, the high-pressure fuel is pressed into the common rail through the outlet valve (one-way valve); The plunger stroke after the control valve is opened corresponds to the oil supply; If the opening time of the control valve (the pre stroke to backwater) is changed, the oil supply will change accordingly, so that the common rail pressure can be controlled.