Alternator isolating decoupler

1. An alternator isolating decoupler comprising:

an alternator shaft;

a one-way clutch engaged with the alternator shaft;

a first wrap spring releasably engaged with the one-way clutch;

a second wrap spring releasably engaged with the one-way clutch;

the second wrap spring arranged in parallel with the first wrap spring;

the first wrap spring and the second wrap spring in nested relation;

the first wrap spring and the second wrap spring each having an end releasably engagable with an end cap, the end cap fixedly connected to an outer housing;

the first wrap spring and the second wrap spring each engaged in series with a torsion spring;

the torsion spring engaged with the outer housing; and

the outer housing engaged with an alternator rotor.

2. The alternator isolating decoupler as in claim 1 further comprising a clutch carrier disposed between the first wrap spring and the second wrap spring and the one-way clutch.

3. The alternator isolating decoupler as in claim 1 , wherein the end cap comprises a circumferential pocket for receiving an end of the first wrap spring and an end of the second wrap spring.

4. The alternator isolating decoupler as in claim 1 further comprising a torsion spring driver member disposed between the first wrap spring and the second wrap spring and the torsion spring.

5. The alternator isolating decoupler as in claim 1 wherein the end cap is engaged with a bearing, the bearing engaged with the alternator shaft.

6. An alternator isolating decoupler comprising:

an alternator shaft;

a one-way clutch engaged with the alternator shaft;

a first spring and a second spring arranged in parallel;

the first spring and second spring releasably engaged with the one-way clutch;

the first spring and the second spring each having an end releasably engagable with an end cap, the end cap fixedly connected to an outer housing;

the first spring and the second spring engaged in series with a torsion spring;

the torsion spring engaged with the outer housing; and

the outer housing engaged with an alternator rotor.

7. The alternator isolating decoupler as in claim 6 , wherein the first spring and second spring are in nested relation.

8. The alternator isolating decoupler as in claim 6 , wherein the first spring and second spring are loaded in a winding direction.

9. The alternator isolating decoupler as in claim 6 , wherein the torsion spring is loaded in an unwinding direction.

10. An alternator isolating decoupler comprising:

an alternator shaft;

a one-way clutch engaged with the alternator shaft;

a first spring and a second spring releasably engaged with the one-way clutch;

the first spring and the second spring each having an end releasably engagable to an outer housing;

the first spring and the second spring engaged in series with a torsion spring;

the torsion spring engaged with the outer housing; and

the outer housing engaged with an alternator rotor.

11. The alternator isolating decoupler as in claim 10 , wherein the first spring and second spring are in nested relation.

12. The alternator isolating decoupler as in claim 10 , wherein the first spring and second spring are loaded in a winding direction.

13. The alternator isolating decoupler as in claim 10 , wherein the torsion spring is loaded in an unwinding direction.

14. The alternator isolating decoupler as in claim 10 , wherein the first spring and second spring are in parallel.

15. The alternator isolating decoupler as in claim 10 further comprising a torsion spring driver member disposed between the first spring and the torsion spring.