What is the phenomenon that the electromagnetic valve of automatic transmission is broken?

The failure of solenoid valve will lead to many problems such as gear shifting frustration, slipping, gear shifting impact, inability to upshift and so on.

The controlled medium (liquid and gas air under pressure, the pressure value is the middle value of the solenoid valve pressure range) can be applied to the solenoid valve, and then the solenoid valve coil is energized. If the controlled medium changes from on to off or from off to on, then the solenoid valve is good, otherwise there is a problem.

The electromagnetic coil of the solenoid valve generates magnetic attraction after being electrified, which overcomes the pressure of the spring to drive the valve core to move. There is only one electromagnetic coil, which is simple in structure and low in price, and can only be opened and closed.

The valve stem is driven by the motor to drive the valve core to move, and the electric valve is divided into (cut-off valve) and regulating valve. Closing the valve is a two-position operation, that is, fully open and fully closed. The regulating valve is equipped with an electric valve positioner, which can dynamically stabilize the valve in one position through closed-loop adjustment.

Extended data

Selection basis of solenoid valve:

1. Select the size (DN) and interface mode of the solenoid valve according to the pipeline parameters.

1) Determine the pipe diameter (DN) according to the internal diameter or flow requirements of the on-site pipeline;

2) Interface mode: generally, flange interface should be selected for > DN50, and ≤DN50 can be freely selected according to user's needs.

2. Select the material and temperature group of the solenoid valve according to the fluid parameters.

1) corrosive fluid: corrosion-resistant solenoid valves and all stainless steel should be selected; Edible ultra-clean fluid: food-grade stainless steel solenoid valve should be selected;

2) High-temperature fluid: The electromagnetic valve shall be made of high-temperature resistant electrical materials and sealing materials, and the piston structure type shall be selected;

3) Fluid state: large to gaseous, liquid or mixed state, especially when the diameter is greater than DN25, it must be distinguished;

4) Fluid viscosity: generally less than 50cSt can be selected; If it exceeds this value, a high-viscosity solenoid valve should be selected.

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