Operating principle of the automatic transmission pressure regulator
The automatic transmission pressure regulator is an important component of the automatic transmission hydraulic control system. It is responsible for regulating the pressure in the automatic transmission hydraulic system, which is necessary for proper gear shifting.
The automatic transmission pressure regulator works as follows:
1. Oil pressure:
* Inside the automatic transmission, the pump creates oil pressure, which circulates through the hydraulic system.
2. Pressure sensor:
*The pressure regulator contains a pressure sensor that measures the oil pressure in the system.
3. Solenoid:
* The solenoid is an electrically operated valve that controls the flow of oil through the pressure regulator.
4. Spring:
*The pressure regulator has a spring that maintains the base oil pressure in the system.
5. Return mechanism:
* A return mechanism such as a ball or piston helps return the solenoid to its original position.
6. Pressure adjustment:
* When the pressure sensor detects that the oil pressure is lower or higher than desired, it sends a signal to the automatic transmission electronic control unit (ECU).
* The ECU then sends a signal to the solenoid, which regulates the flow of oil into and out of the pressure regulator.
* The solenoid can open or close to increase or decrease the oil pressure in the system.
* The spring provides a base pressure that holds the solenoid in a certain position until the oil pressure changes.
7. Hydraulic control:
* The regulated oil pressure is then used to power and control other automatic transmission components such as the torque converter, clutches and shift valves.
Proper operation of the transmission pressure regulator is critical to ensuring smooth shifting, protecting internal transmission components from damage, and ensuring optimal overall transmission performance.