CLUTCH AND BRAKE


DISH PLATE AND HIGH-LOAD WAVE PLATE



CENTRIFUGAL CANCEL CHAMBER



Operation and function



  • Clutch pressure not in operation
    When the clutch drum is rotated, the centrifugal force works on the remaining A/T fluid in clutch chamber, and the force pushes the clutch piston. However, because the centrifugal force also works on the A/T fluid charged in the centrifugal cancel chamber, the clutch piston is pushed back. Therefore, the clutch piston does not move because both forces are cancelled by each other, preventing the clutch drag.
  • Clutch pressure in operation
    When the clutch pressure works on the cylinder chamber, the pressure overcomes the facing centrifugal cancel chamber’s hydraulic pressure and the spring force. Consequently, the clutch piston is pushed, and the clutch is engaged. At this time, the centrifugal force that works on the clutch pressure of cylinder chamber is cancelled out by the centrifugal force that works on the centrifugal cancel chamber. Therefore, the effects from centrifugal force generated by the clutch drum rotation will be eliminated. For this reason, the constant clutch piston pushing force is obtained with all rotations, and smooth shifting has been achieved.

1.
 Clutch plate

2.
Clutch drum

3.
 Cylinder chamber

4.
 Return spring

5.
 Centrifugal cancel chamber

6.
 Clutch piston

7.
 Dish plate

8.
 Clutch disc

9.
 Retaining plate

10.
 Snap ring

ONE-WAY CLUTCH



STRUCTURE



OPERATION



  • When the one-way clutch is operating
    When the one-way clutch rotates toward the torque transmission direction, the rollers move toward the narrow side of the roller chamber, which is composed of the inner race and the outer race. Since the narrow side of the roller chamber is smaller than the roller diameter, the rollers are engaged between the cam surfaces of the outer race and the cylindrical surface of the inner race, and the inner race and the outer race rotate together.
  • When the one-way clutch is not operating
    When the one-way clutch rotates toward the direction opposite to the torque transmission, the rollers move toward the wide side of the roller chamber, which is composed of the inner race and the outer race. Since the wide side of the roller chamber is larger than the roller diameter, a clearance is created between the roller chamber and the rollers. Therefore, the inner race and the outer race are released.

1.
 Spring

2.
Outer race

3.
 Inner race

4.
 Roller