Where is the viscous coupling located?
The viscous coupling is often found in all-wheel-drive vehicles. It is commonly used to link the back wheels to the front wheels so that when one set of wheels starts to slip, torque will be transferred to the other set.
What does viscous coupling do?
A viscous coupling is a mechanical device which transfers torque and rotation by the medium of a viscous fluid.
What is Volvo Haldex?
The first-generation Haldex AWD system is the first reactive hydraulic AWD system produced by Haldex Traction. This means the AWD system relies on wheelspin to activate the torque transfer from front to rear wheels. It uses a mechanical pump connected to the input and output shaft of the Haldex clutch assembly.
Which cars use Haldex?
The Haldex all-wheel drive system is currently used in the following vehicle models:
- Volkswagen Group (Volkswagen AG) Audi A3 quattro.
- Volvo Cars. Volvo S40 AWD.
- Ford. Ford Taurus.
- Land Rover. Land Rover Freelander 2/LR2.
- Saab Automobile. Saab 9-3 Turbo X (2007–2008) (Haldex Fourth Gen with eLSD)
- GM.
When did Volvo stop using viscous coupling in all wheel drive?
This is why Volvo first reduced the pre-tensioning in 2000 and then replaced the viscous coupling with Haldex clutch on their all wheel drive vehicles in model year 2003 (Volvo s60 has Haldex since 2002). [1] In this case, all wheels are powered at all times.
How does viscous coupling work in a car?
In this case, all wheels are powered at all times. Viscous coupling is integrated into the center differential. Central differential distributes power to all wheels and lets them turn at different speeds while cornering.
Is the Volvo S60 an all wheel drive car?
An all-wheel-drive model has joined the S60 sedan lineup for 2002. The electronically controlled AWD system was developed in cooperation with Haldex, a company called a pioneer in the vehicle-technology field. Power is distributed automatically to the wheels via a wet multiplate clutch.
How does VW Golf MkII Syncro reduce viscous coupling?
In an attempt to reduce the coupling’s activation time, VW Golf MkII Syncro always transfers 5% of torque to rear wheels (this is achieved by rear driveshaft rotating slower than front driveshaft in normal conditions, causing viscous fluid warm-up and slight solidification).