Is the valve in the car gearbox hydraulic?
The automatic transmission can automatically change the transmission ratio according to the engine load and speed, so as to make the vehicle obtain good power and fuel economy, and reduce engine exhaust pollution. The automatic transmission is easy to operate, and can greatly improve the safety and reliability of the vehicle when the vehicle is crowded. Electronic control automatic transmission is usually composed of hydraulic torque converter, planetary gear transmission system, shift actuator, hydraulic control system, electronic control system of five parts. At present, the single stage, double phase and three element locking synthetic torque converter is widely used in the car, which consists of pump wheel, turbine and guide wheel. The pump wheels and turbines are in pots. With the pump wheel torque converter shell is connected as a whole, active element; turbine suspension in the torque converter, connected by spline and the output shaft is a driven element; guide wheel is suspended between the pump and turbine wheel through a one-way clutch and a guide wheel shaft sleeve is fixed on the transmission housing. When starting the engine, the crankshaft drives the pump wheel rotation, because of the centrifugal force generated by the rotation of the working liquid pump wheel between the leaves along the blade from the inner edge to the margin thrown out; speed of this part of the work fluid has both rotate with the pump wheel park circumferential and axial, rushed to the turbine speed. The working fluid impacts the turbine blades and pushes the turbine to rotate in the same direction as the pump wheels.
The body of the general gearbox is used for high and low conversion. When the speed reaches a certain gear speed, the hydraulic oil pushes the valve body to change the gear to the gear automatically.The automatic transmission can automatically change the transmission ratio according to the engine load and speed, so as to make the vehicle obtain good power and fuel economy, and reduce engine exhaust pollution. The automatic transmission is easy to operate, and can greatly improve the safety and reliability of the vehicle when the vehicle is crowded. Electronic control automatic transmission is usually composed of hydraulic torque converter, planetary gear transmission system, shift actuator, hydraulic control system, electronic control system of five parts.
The speed at which the fluid flows out of the turbine V can be seen as the rate at which the work fluid flows out relative to the surface of the turbine blade, and is combined with a rotational velocity U of the turbine. When the turbine speed is relatively small, the working fluid flowing out of the turbine is backward, and the working fluid impacts the front of the guide wheel blade. Because the guide wheel is limited by a one-way clutch, it can not rotate backward, so the guide vane moves the working fluid backward to guide the impeller of the pump wheel to promote the rotation of the pump wheel, thereby increasing the torque acting on the turbine. As the turbine speed increases, the rate of u increases as the speed V of the Omega and u begins to point to the back of the guide vanes. The torque converter reaches the critical point. When the turbine speed increases further, the working fluid will impact the back of the guide wheel blade. Because the unidirectional clutch allows the guide wheel to rotate forward with the pump wheel, the guide wheel rotates freely along the rotation direction of the pump wheel under the driving of the working fluid, and the working fluid flows back to the pump wheel smoothly. When the working fluid outflow from the turbine guide vane outlet coincides with the same direction, the torque converter is not produced by twisting effect (the torque converter condition called hydraulic coupling condition).
The speed at which the fluid flows out of the turbine V can be seen as the rate at which the work fluid flows out relative to the surface of the turbine blade, and is combined with a rotational velocity U of the turbine. When the turbine speed is relatively small, the working fluid flowing out of the turbine is backward, and the working fluid impacts the front of the guide wheel blade. Because the guide wheel is limited by a one-way clutch, it can not rotate backward, so the guide vane moves the working fluid backward to guide the impeller of the pump wheel to promote the rotation of the pump wheel, thereby increasing the torque acting on the turbine. As the turbine speed increases, the rate of u increases as the speed V of the Omega and u begins to point to the back of the guide vanes. The torque converter reaches the critical point. When the turbine speed increases further, the working fluid will impact the back of the guide wheel blade. Because the unidirectional clutch allows the guide wheel to rotate forward with the pump wheel, the guide wheel rotates freely along the rotation direction of the pump wheel under the driving of the working fluid, and the working fluid flows back to the pump wheel smoothly. When the working fluid outflow from the turbine guide vane outlet coincides with the same direction, the torque converter is not produced by twisting effect (the torque converter condition called hydraulic coupling condition).
