Which mechanism is commonly used to control the axial position of the stator wheel in a torque converter?

Which mechanism is commonly used to control the axial position of the stator wheel in a torque converter?

• A. Thrust bearings or washers
• B. The rotating impeller
• C. The clearance between the elements
• D. Changing the curvature of the elements

Answer: (A)

Thrust bearings or thrust washers provide the axial support that locates the stator wheel along the shaft in a torque converter. As the impeller drives fluid, hydraulic forces push on the stator and could push it slightly forward or backward. The thrust bearings handle those axial loads and keep the stator in the correct position relative to the impeller and turbine, ensuring proper alignment, stable clearance, and smooth operation. This arrangement also allows the stator to rotate with the shaft while resisting unwanted axial movement, which is crucial for efficient torque multiplication and to prevent wear. The rotating impeller is essential for moving the fluid but it isn’t what fixes the stator’s axial location. The clearance between elements is a natural result of design tolerances and lubrication, not a mechanism to position the stator. Changing the curvature of the elements would alter the flow characteristics and performance, not provide a method for axial positioning during operation.

Thrust bearings or thrust washers provide the axial support that locates the stator wheel along the shaft in a torque converter. As the impeller drives fluid, hydraulic forces push on the stator and could push it slightly forward or backward. The thrust bearings handle those axial loads and keep the stator in the correct position relative to the impeller and turbine, ensuring proper alignment, stable clearance, and smooth operation. This arrangement also allows the stator to rotate with the shaft while resisting unwanted axial movement, which is crucial for efficient torque multiplication and to prevent wear.

The rotating impeller is essential for moving the fluid but it isn’t what fixes the stator’s axial location. The clearance between elements is a natural result of design tolerances and lubrication, not a mechanism to position the stator. Changing the curvature of the elements would alter the flow characteristics and performance, not provide a method for axial positioning during operation.