Transmission Solenoid Valve for SCANIA

The control part of the transmission body is used to change the oil circuit to the shift actuator (clutch and brake) during the shift, thereby enabling shift control. The locking signal valve is controlled by a solenoid valve to engage and disengage the locking clutch in the torque converter in time. The role of the shift quality control part is to make the shift process smoother and softer.

As an important part of the transmission when shifting, the valve body on the ordinary transmission is used to shift between high and low gear. When the speed reaches a certain gear, the hydraulic oil pushes the valve body to automatically shift to this gear. The automatic transmission can automatically change the transmission ratiozaccording to the engine load and speed, so that the car can obtain good power performance and fuel economy, and reduce the engine emission pollution. The automatic transmission is simple to operate and can greatly improve the safety and reliability of the vehicle when the vehicle is crowded. Electronic automatic transmission is usually composed of hydraulic torque converter, planetary gear transmission system, shift actuator, hydraulic control system and electronic control system.

At present, the single-stage two-phase three-lock integrated torque converter composed of pump wheel, turbine and guide wheel is widely used in automobiles. The pump wheel and turbine are basin shaped. The pump wheel is connected with the torque converter housing and is an active component; The turbine is suspended in a torque converter and connected to the output shaft by splines and is a driven element. The guide wheel is suspended between the pump wheel and the turbine and is secured to the gearbox housing by a one-way clutch and guide wheel shaft sleeve. After the engine starts, the crankshaft drives the pump wheel to rotate, and the centrifugal force generated by the rotation causes the working fluid between the pump wheel blades to be thrown out along the blade from the inner edge to the outer edge. This part of the working fluid not only has a circumferential component speed with the rotation of the pump wheel, but also an axial component speed towards the turbine. These working fluids hit the turbine blades, pushing the turbine to rotate in the same direction as the pump impeller.

Ref. No.1773867,1910461, 2423447, 2472630, 2539744, 2591753