4720902020 Scania Truck Parts

  The working principle of the Solenoid valve, the Solenoid Valve has a closed cavity, there are holes in different positions, each hole leads to a different oil pipe, the middle of the cavity is the valve, the two sides are two solenoids, which side of the magnet coil energized valve body will be attracted to which side, by controlling the movement of the valve body to block or leak out different oil discharge holes, and the oil inlet hole is normally open, the hydraulic oil will enter different oil discharge pipes, and then push the piston of the oil gang through the pressure of the oil, the piston drives the piston rod, and the piston rod drives the mechanical device to move. In this way, the mechanical movement is controlled by controlling the current of the electromagnet.

  The solenoid valve of the truck is generally carried out with two lines, constituting one is the duty cycle signal of PWM, one is the long power supply, the control type of the solenoid valve has the control of the positive electrode, PWM signal, there is also the control of the negative pole PWM signal, the solenoid valve according to the engine computer provides different duty cycle signals, open the solenoid valve opening is not the same, the larger the solenoid valve duty cycle, the larger the opening of the opening, in this way, the solenoid valve will work longer, the smaller the duty cycle of the solenoid valve, then, The shorter the solenoid valve works per unit of time