AWF8F35

AWF8F35

AWF8F35

Motor vehicle


The Aisin AW F8FXX series is the world's first[1] 8-speed automatic transmission designed for use in transverse engine applications. Aisin designed the transmission to package in the same space as preceding 6-speed designs, while increasing the total gear spread and reducing gear spacing.[2] It is also called the EAT8 (PSA), GA8F22AW (BMW & Mini), TG-81SC (Volvo), [3] AF50-8 (Opel/Vauxhall), [4] AWF8F45[5] (Cadillac), and AQ450 (Volkswagen Group).[6] First usage was in the 2013 model year Lexus RX350 F Sport.

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Specifications

Gearset 1 is not an ordinary gearset but a reverse one. It employs two planetary gears which mesh with each other. One of these planets meshes with the sun gear, the other planet meshes with the ring gear. This results in different ratios being generated by the planetary and also causes the sun gear to rotate in the same direction as the ring gear when the planet carrier is the stationary.

This made it possible to manage with three wheel sets. As a result, the transmission is more compact than eight-speed transmissions for conventional drives. This meant that an eight-speed automatic transmission was also possible for transverse engines. The same gearset concept was first used by Lexus in 2007 and was the very first eight-speed automatic transmission for passenger cars on the world market.

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  1. Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage
  2. Layout
    (1) Planetary gearset 1 is on the input (turbine) side
    (2) Output shaft is ring 3 (ring gear of gearset 3 (outer Ravigneaux gearset)
  3. Sun 1: sun gear of gearset 1: reverse gearset
  4. Ring 1: ring gear of gearset 1 reverse gearset
  5. Sun 2: sun gear of gearset 2: inner Ravigneaux gearset
  6. Ring 2: ring gear of gearset 2: inner Ravigneaux gearset
  7. Sun 3: sun gear of gearset 3: outer Ravigneaux gearset
  8. Ring 3: ring gear of gearset 3: outer Ravigneaux gearset

Applications

BMW/MINI

Changan

Chery

Citroën

DS Automobiles

Exeed

Geely

GM

Jaguar

Land Rover

Lexus

  • 2012–present Lexus RX (V6 AL10 F-Sport, AL20 & AL30 non Hybrids)
  • 2018–present Lexus ES (non-hybrid engines)
  • 2020–present Lexus LM (LM350)
  • 2022– Lexus NX (non-hybrid engines)

Lynk & Co

  • 2017–present 01
  • 2018–present 03
  • 2020–present 05[9]
  • 2021–present 02
  • 2021–present 09

Mitsubishi

Opel/Vauxhall


Peugeot

Polestar

Škoda

Toyota (as UA8xx)

Volkswagen/MAN

Volvo (TG-81SC/SD)


References

  1. Toshihiko Aoki; Hiroshi Kato; Naoki Kato; Morise Masaru (8 April 2013). The World's First Transverse 8-Speed Automatic Transmission (Technical report). SAE International. doi:10.4271/2013-01-1274. 2013-01-1274.
  2. Aisin AW Co. "High Torque Capacity FWD 8-speed AT". www.aisin-aw.co.jp. Archived from the original on 2018-05-20. Retrieved 2018-05-19.
  3. "Volvo V60 prijslijst Modeljaar 2019" [Volvo V60 price list model year 2019] (PDF). volvo-tools-prd-media.s3.amazonaws.com (in Dutch). Volvo Cars Netherlands. July 2018. pp. 18–19. Archived (PDF) from the original on 2021-10-16. Retrieved 2018-07-14. File valid from 12 November 2018
  4. Geord Bednarek (2 December 2016). "Der neue Insignia – im 8-Stufen Takt" [The new Insignia – with 8-step beat]. www.opel-blog.com (in German). Opel AG. Archived from the original on 2017-10-15. Retrieved 2017-12-29.
  5. "Cadillac XT5 Initiates New Series of Cadillac Luxury Crossovers" (PDF). media.cadillac.com (Press release). Cadillac. 9 November 2015. p. 12. Retrieved 2018-07-14. No archive due to robots.txt
  6. "All-New 2017 Buick LaCrosse is Here | TechLink". sandyblogs.com. Retrieved 2018-08-02.
  7. Don Sherman (December 2016). "2018 Volkswagen Tiguan: We Finally Sample the U.S. Version". caranddriver.com.
  8. Chris Davies (5 September 2014). "2015 Volvo S80 D4 Geartronic SE Lux review – Updated Swedish Exec Gets Greener". carproductstested.com. Archived from the original on 2017-11-07. Retrieved 2017-12-28.
  9. "Volvo V70 – model year 2014". www.media.volvocars.com. Volvo Car Corporation. 13 May 2013. Archived from the original on 2013-10-23. Retrieved 2017-12-28.
  10. Paul Weissler (20 January 2016). "Volvo's 2017 S90 has standard semi-autonomous driving system". articles.sae.org. SAE International. Archived from the original on 2017-10-17. Retrieved 2017-12-29.
  11. Gary Witzenburg (8 January 2018). "2019 XC40 spearheads Volvo's new CMA platform". SAE International. Archived from the original on 2018-06-12. Retrieved 2018-06-08.

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This article uses material from the Wikipedia article AWF8F35, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.