Centrifugal governor, automatic transmission A240L
The centrifugal governor in the A240L automatic transmission is a mechanical device that adjusts the transmission ratio depending on the speed of rotation of the input shaft. It is located in the torque converter housing and consists of the following main components:
* Housing: Contains all other regulator components.
* Weights: Several weights hinged to the body.
*Springs: Springs that hold the weights in place.
*Piston: The piston that moves inside the housing as the rotation speed of the input shaft changes.
Working principle:
As the rotation speed of the input shaft increases, centrifugal force acts on the weights, causing them to move outward. This moves the piston up, reducing oil pressure on the low clutch piston. This releases the low gear clutch, causing the gear to shift to a higher gear.
When the rotation speed of the input shaft decreases, the centrifugal force decreases and the weights return to their original position under the action of the springs. This causes the piston to move downward, increasing oil pressure on the low clutch piston and causing the gear to shift down.
Functions:
The centrifugal regulator performs the following functions:
*Adjusts transmission ratio to maintain optimal speed and fuel economy.
* Prevents downshifting at high speeds, which could cause engine damage.
* Reduces the load on the engine when accelerating the car.
Malfunctions:
Failures in the centrifugal governor can cause shifting problems and reduced transmission performance. Common faults include:
* Weakening of springs
* Wear of weights or piston
*Oil leaks
* Locking mechanism
*Damage to housing