Fuel pressure regulator
The regulating valve has two regulating circuits: a low-speed electric regulating circuit for adjusting the average pressure value of the change in the common rail;
Speed mechanical hydraulic adjustment circuit for compensating for high frequency pressure fluctuations. High pressure fuel passage at the outlet of the common rail or high pressure pump
The high pressure oil inlet acts on the pressure regulating valve. Since the currentless electromagnetic coil does not generate a force, the high pressure of the fuel
The force is greater than the spring force and the pressure regulator opens. The pressure regulating valve adjusts the opening degree according to the amount of oil supply. The spring
It is designed for a maximum pressure of about 10 MPa. If you want to increase the pressure in the high pressure circuit, you must base the spring force.
Based on the establishment of electromagnetic force. When the electromagnetic force and the spring force are balanced with the high fuel pressure, the pressure regulating valve stays at some
In the open position, the fuel pressure remains unchanged. Regulating valve when the amount of pump oil changes and when fuel is ejected from the injector
Compensation is made by different opening degrees. The electromagnetic force of the solenoid valve is proportional to the control current, and the change of the control current
This is achieved by pulse width modulation. The modulation frequency of the pulse width is 1 kHz, which prevents the movement of the armature pin from interfering with the common rail.
Pressure fluctuations.
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