One-Way Clutch 1, One-Way Clutch 2

ONE-WAY CLUTCH 1, ONE-WAY CLUTCH 2

One-Way Clutch 1, One-Way Clutch 2:

One-way Clutch 1 (sprag type)
^ If the rotation speed of the one-way clutch outer race is faster than that of the one-way clutch inner race, the sprags enter between the two races and lock them. Consequently, the driving force is transferred to the small sun gear via one-way clutch 1. During in fourth gear, one-way clutch 1 runs idle and does not transfer the driving force because the rotation speed of the one-way clutch inner race is faster.

One-way Clutch 2 (roller or sprag type)
^ The one-way clutch inner race rotates counterclockwise freely. However, in the roller type if the inner race tries to rotate clockwise, the rollers move to the shallower grooves and enter between the races; in the sprag type, the sprags enter between the races. In either case, the one-way clutch inner race is locked. In other words, one-way clutch 2 locks the clockwise rotation of the planetary carrier, the pinion gear.

One-way Clutch
The one-way clutch permits rotation in one direction only. For the EC-AT, two types of one-way clutches are used: the roller type and the sprag type.





Construction and operation of roller type
For the roller type one-way clutch, ramps are provided in the outer race. When the outer race tries to rotate clockwise, the rollers move to the large area and free rotation is possible. If it tries to rotate counterclockwise, however, the rollers are forced to the smaller area, and the outer race is secured to the inner race.

Construction and operation of sprag type
For the sprag type one-way clutch, when the outer race tries to rotate clockwise, the sprags lean toward the right, so that the outer race can rotate freely. If it tries to rotate counterclockwise, however, the sprags lean to the left, wedging themselves between the two races and causing it to become fixed.