The overrunning clutch is one of the important components of automotive alternators designed to prevent the transmission of torque to the drive shaft when the drive shaft speed becomes too high. In addition, this clutch is included in the case when the torque needs to be transmitted in one direction.

1. C-MAX II (DXA/CB7, DXA/CEU)
2. GRAND C-MAX (DXA/CB7, DXA/CEU)
3. C30 (533)
4. S40 II (544)
5. S40 II Saloon (544)
6. FOCUS III Saloon
7. FOCUS III
8. FOCUS III Turnier
9. FIESTA VI Van
10. FIESTA VI (CB1, CCN)
11. V50 (545)
12. V50 Estate (545)
13. ECOSPORT
14. ECOSPORT SUV
15. TOURNEO CONNECT / GRAND TOURNEO CONNECT V408 MPV
16. TRANSIT CONNECT V408 Box Body/MPV
17. B-MAX (JK)
18. See more in applications

The principle of the WAI brand Alternator Freewheel Clutch work

One of the weakest points of generators is precisely the belt drive. The problem is that the car's engine works unevenly - the torque through the shaft was transmitted by pulses, the sequence of which corresponded to the combustion of fuel in the cylinders. In turn, the rotor speed should be 2-3 times higher than the crankshaft speed. Add to this the fact that the car is constantly changing the speed mode (acceleration-deceleration), and imagine how over time the alternator belt stretches and then breaks. It was possible to neutralize this effect by introducing an overrunning clutch connected to the generator pulley.