What is the function of the gearbox solenoid valve? Working principle diagram of the gearbox solenoid valve

Transmission solenoid valves are widely used in the modern automobile industry, and the quality of the solenoid valve is closely related to the quality of the car. The power supply applied to the solenoid valve is extremely complex in actual operation, which is mainly reflected in the complexity and randomness of the voltage amplitude, frequency, and duty cycle of the solenoid valve power supply. What is the function of the transmission solenoid valve? The function of the automobile transmission solenoid valve is to control the mechanical valve to complete the switching of the oil circuit and the pressure regulation of the oil circuit flow. It is controlled by the transmission electronic control module TCU. Gearbox refers to a transmission, which is a mechanism used to change the speed and torque from the engine. It can fix or change the transmission ratio of the output shaft and input shaft in different gears. It is composed of a speed change transmission mechanism and a control mechanism. The types of gearboxes are: 1. According to the way the transmission ratio changes, it can be divided into: stepped gearbox, continuously variable gearbox, and comprehensive gearbox;2. According to the operation method, it can be divided into: forced-operated gearbox, Automatic transmission, semi-automatic transmission. The working principle diagram of the gearbox solenoid valve simply says that the solenoid valve is like a faucet. Different openings produce different flow rates of hydraulic oil and produce different pressures. The solenoid valve is controlled by the transmission electronic control module TCU. Basically, the pressure in neutral and in gear is a constant value. Only the opening of the solenoid valve is adjusted during the shifting process to improve the smoothness of the shift. Different solenoid valves control different clutches or brakes, functioning in different gears. Each gear is jointly controlled by one or several solenoid valves. The working principle and structure of solenoid valves generally use two-position three-way valves, and some use three-position three-way valves. The gearbox solenoid valve uses the reversing function of the two-position three-way solenoid valve to make the oil pressure of the brake cylinder continuously reciprocate between pressurization, pressure maintenance, and pressure relief. It can reciprocate thousands of times per second, so that the wheels are in a sliding and The critical state of locking allows the wheels to have sufficient adhesion to prevent the car from losing control during braking. Now that we have figured out the working principle of the automobile transmission solenoid valve, let’s take a look at the functions of the automobile transmission solenoid valve: The automobile transmission solenoid valve can be divided into a single solenoid solenoid valve and a double solenoid solenoid valve, which are generally called They are single coil and double coil;the valve core of the single coil solenoid valve changes direction after the power is turned on, but it will recover after the power is turned off. The valve core of the double coil solenoid valve changes the direction after the power is turned on on one side, but the valve core does not change the direction after the power is turned off. It will return only after the coil on the other side is energized. To put it simply, it is an electrically controlled switch. The ECU uses feedback signals from various sensors to determine whether to shift gears, and then conducts the gear change through the solenoid valve to conduct the oil circuit! Transmission solenoid valve (diagram) The following takes the Volkswagen 6-speed 09G automatic transmission system solenoid valve as an example. The Volkswagen 6-speed 09G automatic transmission system solenoid valve can be divided into a shift solenoid valve (switch solenoid valve) with two shift positions and an electric pressure Control solenoid valve (pressure regulating solenoid valve). N88 and N89 are shift solenoid valves, and N90, N91, N92, N93, N282, and N283 are electric pressure control valves. Shift solenoid valves are switching solenoid valves that control hydraulic valves with automatic transmission fluid (ATF) oil pressure, thereby opening or closing the passage of the ATF. Electric pressure control valves proportionally convert electrical current into hydraulic control pressure. N90 controls the oil pressure of clutch K3;N91 controls the oil pressure of the torque converter lock-up clutch;N92 controls the oil pressure of clutch K1;N93 controls the oil pressure of the main oil circuit and controls the pressure of the clutch and brake during the gear change process;N282 controls the oil pressure of clutch K2;N283 controls the oil pressure of brake B1;solenoid valves N88 and N89 are used for shift control of the 4th to 6th gears, and are controlled alternately briefly during the shift process. In addition, N88 and N89 also control brake B2 in the first gear of the transmission manual/automatic conversion mode for engine braking. The above is what the function of the gearbox solenoid valve is, and the working principle diagram of the gearbox solenoid valve is introduced. If you want to know more related information, please log in to Sunway Pneumatic www.diancifa.cc to view.