Drive Belt: Description and Operation
Belt DriveThe belt drive in the new Boxster and Cayman engines has been improved compared to previous models through the following measures in particular:
- Double-sided poly-V-belt
- Light-alloy torsional vibration damper
- Maintenance-free hydraulic belt tensioner
The use of a 6-groove dual poly V-belt makes it easier to drive the auxiliary units. As a result, two deflection rollers used on the previous models are no longer needed, thereby reducing the weight and torsional mass. The use of plastic pulleys (on auxiliary units) and a new torsional vibration balancer with improved dynamic properties also reduces the weight and torsional mass.
Markings and fixing bores have been applied to the pulley and crankcase to facilitate various maintenance and repair work.
Belt Tensioner
The new maintenance-free, hydraulic belt tensioner with its speed-proportional damping minimizes the belt vibrations on the bearings in the system.
