What is an Automotive Solenoid Valve?
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An automotive solenoid valve is an actuating component of the electronic control system. Based on its function, it can be categorized into shift solenoid valves, lock-up solenoid needle valves, and pressure-regulating solenoid needle valves. According to its working mode, it is divided into on-off solenoid valves and pulse-width modulated (PWM) solenoid valves. Below is relevant information: 1. Automotive Solenoid Valve: Principle: When energized, the electromagnetic coil generates a magnetic force to lift the closing element from the valve seat, opening the valve; when de-energized, the magnetic force disappears, and the spring presses the closing element against the valve seat, closing the valve. The solenoid valve utilizes the electromagnetic attraction force generated by electric current flowing through the coil to actuate the valve core (overcoming spring or gravitational force). It is classified into normally open and normally closed types. Typically used to cut off the flow of oil, water, gas, and other substances. It works in conjunction with electrical equipment such as pressure and temperature sensors to achieve automatic control. 2. Direct-Acting Solenoid Valve: Principle: When energized, the electromagnetic coil generates a magnetic force to lift the closing element from the valve seat, opening the valve; when de-energized, the magnetic force disappears, and the spring presses the closing element against the valve seat, closing the valve.