Vehicle drivetrain system with a dual wall boot

1. A vehicle drivetrain comprising:

a driveshaft;

a driveshaft joint configured to be coupled to an end of the driveshaft, the driveshaft joint having an exterior wall defined by an outer race, the driveshaft joint further having roller bearings and a yoke, the roller bearings being disposed on the yoke, the outer race being a housing for the roller bearings; and

a boot disposed over the driveshaft joint, the boot having an inner wall and an outer wall, the inner and outer walls being separated by an empty space, the inner and outer walls include a plurality of annular folds, the outer wall of the boot includes a plurality of openings formed in the annular folds of the outer wall to enable air exchange between the empty space and an exterior environment of the boot, the inner wall being installed to the exterior wall of the driveshaft joint at a position over the roller bearings, the boot including a first seal disposed between the inner and outer walls at a first end of the boot to seal the empty space at the first end, the boot further includes a second seal disposed between the inner and outer walls at a second end of the boot to seal the empty space at the second end.

2. The vehicle drivetrain according to claim 1 , further comprising

a longstem configured to be supported to a vehicle transmission, the driveshaft joint being coupled to an end of the longstem.

3. The vehicle drivetrain according to claim 2 , wherein

the driveshaft is a barshaft, the driveshaft joint being disposed between the longstem and the barshaft.

4. The vehicle drivetrain according to claim 1 , further comprising

a first fastener coupling the boot to the driveshaft joint at the first end of the boot.

5. The vehicle drivetrain according to claim 4 , further comprising

a second fastener coupling the boot to the barshaft at the second end of the boot.

6. The vehicle drivetrain according to claim 4 , wherein

the boot includes a first depression at the first end for receiving the first fastener.

7. The vehicle drivetrain according to claim 5 , wherein

the boot includes a second depression at the second end for receiving the second fastener.

8. A boot for a driveshaft joint of a vehicle drivetrain, comprising:

an inner wall and an outer wall, the inner and outer walls being separated by an empty space, the inner and outer walls include a plurality of annular folds, the outer wall of the boot includes one or more openings formed in the annular folds of the outer wall to enable air exchange between the empty space and an exterior environment of the boot, the inner wall having a driveshaft joint attachment surface configured to contact an outer race of a driveshaft joint having roller bearings and a yoke, the roller bearings being disposed on the yoke, the outer race being a housing for the roller bearings;

a first seal disposed between the inner and outer walls at a first end of the boot to seal the empty space at the first end, and

a second seal disposed between the inner and outer walls at a second end of the boot to seal the empty space at the second end.

9. The boot according to claim 8 , wherein

the inner and outer walls are elastic.

10. The boot according to claim 8 , wherein

the boot is configured to be fixed to the driveshaft joint driveshaft at a first end of the boot, and is configured to be fixed to a driveshaft of the drivetrain at a second end of the boot.

11. The boot according to claim 8 , wherein

the outer wall includes first depression at the first end for receiving a first fastener that couples the boot to the driveshaft joint.

12. The boot according to claim 11 , wherein

the outer wall includes a second depression at the second end for receiving a second fastener that couples the boot to the driveshaft.