Transmission Solenoid Valve for BEN

Whether it is DCT, AT or CVT transmission, the mainstream technical solution is the hydraulic system. In the hydraulic system, the solenoid valve, as an actuator, realizes the transformation of the electrical signal to the hydraulic signal, controls the pressure and flow in the hydraulic system, and is the key component in the hydraulic system. The performance of the hydraulic system directly affects the vehicle shift smoothness and fuel economy, and is an important part of the automatic transmission.

The solenoid valve can not be idled in the absence of oil pressure, because it will be easier to cause dry burning damage to the motor in the solenoid valve. The inspection method of solenoid valve is: 1, static check Static check means that when the ignition switch is OFF, measure the resistance value of the solenoid valve, connect the pen tip of the multimeter with the pin of the solenoid valve, observe the resistance value displayed on the instrument screen, if greater than the rated value, it indicates that the solenoid coil is aging, if lower than the rated value, it indicates that the coil is short circuit between turns, if infinite, it indicates that the solenoid coil is open. These conditions indicate that the solenoid valve has failed and must be replaced. 2, dynamic inspection Dynamic inspection refers to the simulation of the actual working process of the solenoid valve, with a certain air pressure instead of oil pressure, through the continuous artificial stimulation of the solenoid valve, check whether the solenoid valve spool movement is smooth and whether the sealing is good. Use an air gun to apply a certain air pressure to the working oil hole of the solenoid valve through the cone-shaped rubber head, press the control switch to make the solenoid valve repeatedly open and close, and observe the change of air flow at the oil drain port. If the air flow always exists, it indicates that the solenoid valve is badly sealed; if there is no air flow, it indicates that the solenoid valve is blocked and stuck; if the air flow is not up to standard, it indicates that the solenoid valve is occasionally stuck. If the air flow changes with the action of the solenoid valve, the solenoid valve is normal.