ALTERNATOR FREEWHEEL CLUTCH FOR VOLVO V60/I S40/II V50 S80 V70/III/Mk/XC S60 HELLA 9XU 358 039-201

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. V60 I (155, 157)
2. S40 II (544)
3. S40 II Saloon (544)
4. V50 (545)
5. V50 Estate (545)
6. S80 II (124)
7. S80 II Saloon (124)
8. V70 III (135)
9. S60 II (134)
10. XC60 (156)
11. XC60 SUV (156)
12. XC70 II (136)
13. XC70 II Estate (136)
14. XC70 II SUV (136)
15. V70 II (285)
16. V70 Mk II (285)
17. XC70 CROSS COUNTRY (295)
18. XC70 CROSS COUNTRY Estate (295)
19. XC70 CROSS COUNTRY SUV (295)
20. V70 XC (295)
21. See more in applications

The principle of the HELLA 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.