Haldex Traction

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Haldex Traction AB is a division of the Swedish manufacturing company Haldex AB. It specializes in the development and manufacture of intelligent all-wheel drive (AWD) systems. Since invention of Gen I in 1998, the company produced several generations of products licensed to and customized for some major automotive brands, that in turn have marketed Haldex Traction AWD under different names. On December 17, 2010, BorgWarner announced that it had signed an agreement to acquire the Traction Systems division of Haldex Group.[1] BorgWarner completed the acquisition of the Traction Systems division on February 1, 2011.[2] Haldex Traction Systems was incorporated in BorgWarner TorqTransfer Systems.[3]

Product history[4]

First generation[5] - 1998

The Haldex Coupling made its first appearance in the Audi TT and VW Golf with an electronically controlled hydraulic-mechanical All-Wheel-Drive concept. This system attempts to engage the rear wheels when the front wheels start to slip.[6]

Second generation[7] - 2001

The second generation of Haldex coupling is an electronically controlled permanent 4x4 system with a Haldex differential calculating how much drive should be directed to the rear wheels. The Haldex system automatically distributes power between the front and rear wheels depending on slippage, but normally sends 95% of the power to the front wheels.[8][9]

Third generation[10] - 2006

The third generation of Haldex coupling made its appearance on the newly re-designed Land Rover Freelander 2 (LR2 in the United States). With enhanced capabilities, it is aimed at providing a more immediate off road response.[11]

This generation of Haldex coupling is later shared with Volvo's complete lineup (Manufactured 2005-2008, depending on model) and is called "Instant Traction" in documentation by Volvo.[12][13]

Fourth generation[14] - 2007

Saab introduced a combination of Haldex Couplings on its 9-3 Turbo-X in late 2007, called XWD (Cross-Wheel Drive).[6][15]

Fifth generation[16]

On 16 April 2009 Haldex announced a deal worth SEK4.5B (approx US$530M) to provide Volkswagen with a new AWD system for the company's new modular platform due in 2012.[17] The GenV AWD coupling, now distributed by BorgWarner TorqTransfer Systems, features a new design aimed at reducing vehicle complexity and simplifying integration into the drivetrain. A new electro-hydraulic clutch actuator uses a centrifugal overflow valve design aimed at accurately distributing power between the front and rear axles, and eliminating the need for an accumulator, solenoid valve and filter. It also employes an integrated electronic control unit.[18]

Haldex in use

"Haldex LSC" refers to the coupling system — its most prominent uses are in all transverse engine 4x4 models of the Volvo Cars and the Volkswagen Group marques: Audi (A3, S3 and TT), Bugatti, SEAT, Škoda, and Volkswagen (Golf), making them non-permanent 4x4s,[citation needed] unlike longitudinal engine models (Audi A4, A6, A8, previous-Volkswagen Passat), which use a Torsen centre differential.[19]

The Haldex LSC has been used in 4WD models of Volkswagen by the name "4motion", and Audi cars under the name of "quattro". The same labels have also been applied to Torsen-based, permanent full-time 4WD systems from both Volkswagen and Audi.[citation needed]

Vehicles equipped with Haldex AWD

The Haldex 4WD system is currently used in the following vehicle models:

  • Saab Automobile[15]
    • Saab 9-3 Turbo X (2007-2008) (Haldex Fourth Gen with eLSD)
    • Saab 9-3 Aero XWD (2008-2010) (Haldex Fourth Gen with eLSD)
    • Saab 9-3 XWD 2.0T (2009), Turbo4 (2011) (Haldex Fourth Gen without eLSD)
    • Saab 9-3 9-3X (2010) (Haldex Fourth Gen with eLSD)
    • Saab 9-5 Turbo6 (2011) (Haldex Fourth Gen without eLSD)
    • Saab 9-5 Aero (2010) (Haldex Fourth Gen with eLSD)
    • Saab 9-4X XWD (Haldex Fourth Gen with eLSD)

See also

References

  1. ↑ "BorgWarner Inc.". borgwarner.com. 2010-12-17. Retrieved 2013-03-22. 
  2. ↑ "BorgWarner Inc.". borgwarner.com. 2011-02-01. Retrieved 2013-03-22. 
  3. ↑ "BorgWarner Inc.". borgwarner.com. Retrieved 2013-03-22. 
  4. ↑ From BorgWarner. "Haldex AWD History". Retrieved 2014-02-03. 
  5. ↑ From BorgWarner. "Gen I". Retrieved 2014-02-03. 
  6. ↑ 6.0 6.1 "Haldex". Haldex-xwd.com. Retrieved 2012-06-09. 
  7. ↑ From BorgWarner. "Gen II". Retrieved 2014-02-03. 
  8. ↑ "The Auto Channel". The Auto Channel. Retrieved 2012-06-09. 
  9. ↑ Canadian Driver
  10. ↑ From BorgWarner. "Gen III". Retrieved 2014-02-03. 
  11. ↑ By  Alex Nunez RSS feed. "AutoBlog". AutoBlog. Retrieved 2012-06-09. 
  12. ↑ Volvo cars - Information on old models
  13. ↑ Volvo’s Instant Traction™ All-Wheel Drive
  14. ↑ From BorgWarner. "Gen IV". Retrieved 2014-02-03. 
  15. ↑ 15.0 15.1 15.2 15.3 15.4 From Haldex press release. "Fourth generation All-Wheel Drive system from Haldex featured in the new SAAB 9-3 XWD". Retrieved 2014-02-03. 
  16. ↑ From BorgWarner. "Gen V". Retrieved 2014-02-03. 
  17. ↑ "AUSmotive.com". AUSmotive.com. Retrieved 2012-06-09. 
  18. ↑ "BorgWarner Inc.". borgwarner.com. Retrieved 2013-03-22. 
  19. ↑ From BorgWarner. "Torsen Worldwide Application Chart 2011". Retrieved 2014-02-03. 
  20. ↑ Magrath, Mike (2010-12-17). "Lamborghini LP700-4 Order Guide Leaked: 690 Horsepower, 3 Matte Colors, 2.9 Seconds to 60". Blogs.insideline.com. Retrieved 2012-06-09. 

External links

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