Engineering:AWTF-80 SC

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Short description: Motor vehicle automatic transmission models
AWTF-80 SC
Overview
ManufacturerAisin Seiki
Production2005 – 2019
Model years2005 – 2019
Body and chassis
Class6-Speed Transverse Automatic Transmission
RelatedFord 6R
GM 6L
ZF 6HP
Chronology
PredecessorAisin TB-50LS
SuccessorAisin-Toyota 8-speed

The Aisin AW TF-8# SC series is a 6-speed automatic transmission designed for use in transverse engine applications produced by Aisin Seiki. It is built in Anjō, Japan,[1] and is also called TF-80SC[2] (AWF21), AF40-6, AM6,[3] AW6A-EL and TF-81SC (AF21).[4] All-wheel drive transfer cases can be fitted to the AWTF-80 SC.

It uses a Lepelletier gear mechanism,[5] an epicyclic/planetary gearset, which can provide more gear ratios with significantly fewer components. This means the Aisin AW TF-8# SC series is actually lighter than its five-speed predecessors.

The Ford 6R, GM 6L, and ZF 6HP transmissions are based on the same globally patented gearset concept. The AWTF-80 SC is the only one for transverse engine installation.

Key Data

Gear Ratios[lower-alpha 1]
Model First
Deliv-
ery 		Gear Total Span Avg.
Step 		Components Nomenclature
R 1 2 3 4 5 6 Nomi-
nal 		Effec-
tive 		Cen-
ter 		Total per
Gear[lower-alpha 2] 		Gears
Count 		Cou-
pling 		Gear-
sets 		Maximum Input Torque
Aisin AWTF-80 2005 −3.394 4.148 2.370 1.556 1.155 0.859 0.686 6.049 4.949 1.687 1.433 3
Gearsets
2 Brakes
3 Clutches 		1.333 6[lower-alpha 2] Installation
L[lower-alpha 3] 		450 N⋅m (332 lb⋅ft)
ZF 6HP All 2000[lower-alpha 4] −3.403 4.171 2.340 1.521 1.143 0.867 0.691 6.035 4.924 1.698 1.433 H[lower-alpha 5] P[lower-alpha 6] 400 N⋅m (295 lb⋅ft) – 750 N⋅m (553 lb⋅ft)
  1. ↑ Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage
  2. ↑ 2.0 2.1 Forward gears only
  3. ↑ Transverse
  4. ↑ first transmission to use the Lepelletier 6-speed gearset concept
  5. ↑ Hydraulic torque converter · German: Hydraulischer Wandler oder Drehmomentwandler
  6. ↑ Planetary gearing · German: Planetenradsätze

Specifications

Combined Parallel and Serial Coupled Gearset Concept For More Gears And Improved Cost-Effectiveness

Main Objectives

The main objective in replacing the predecessor model was to improve vehicle fuel economy with extra speeds and a wider gear span to allow the engine speed level to be lowered (downspeeding). The layout brings the ability to shift in a non-sequential manner – going from gear 6 to gear 2 in extreme situations simply by changing one shift element (actuating clutch E and releasing brake A).

Extent

In order to increase the number of ratios, ZF has abandoned the conventional design method of limiting themselves to pure in-line epicyclic gearing and extended it to a combination with parallel epicyclic gearing. This was only possible thanks to computer-aided design and has resulted in a globally patent for this gearset concept. The AWTF-80 is based on the 6HP from ZF, which was the first transmission designed according to this new paradigm. After gaining additional gear ratios only with additional components, this time the number of components has to decrease while the number of ratios still increase. The progress is reflected in a much better ratio of the number of gears to the number of components used compared to existing layouts.

Gearbox control

To reduce external wiring as well as to provide a constant environment for the transmission control module (TCM), it is located inside the transmission housing. Gear shifting is managed by a computer program that oversees a clutch-to-clutch actuation that allows one clutch engage the instant the clutch from the previous gear disengages. When idling and with the foot brake depressed neutral gear is selected automatically. This helps to reduce internal temperatures and improve the fuel economy.

Features
Maximum shift speed 7,000/min 6,500/min
Maximum torque 350 N⋅m (258 lb⋅ft) 400 N⋅m (295 lb⋅ft)
Torque converter diameter 260 mm (10.2 in)
Length 358 mm (14.1 in)
Weight 90 kg (198 lb)

Gearset Concept: Layout

A conventional 5-pinion planetary gearset and a compound Ravigneaux gearset is combined in a Lepelletier gear mechanism,[5] to reduce both the size and weight. It was first realized in 2000 with the 6HP from ZF Friedrichshafen. Like all transmissions realized with Lepelletier transmissions, the AWTF-80 SC also dispenses with the use of the direct gear ratio, making it one of the very few automatic transmission concepts without such a ratio.

It also has the capability to achieve torque converter lock-up on all 6 forward gears, and disengage it completely when at a standstill, significantly closing the fuel efficiency gap between automatic and manual transmissions.

Gearset Concept: Quality

The ratios of the 6 gears are evenly distributed in all versions. Exceptions are the large step from 1st to 2nd gear and the almost geometric steps from 3rd to 4th to 5th gear. They cannot be eliminated without affecting all other gears. As the large step is shifted due to the large span to a lower speed range than with conventional gearboxes, it is less significant. As the gear steps are smaller overall due to the additional gear(s), the geometric gear steps are still smaller than the corresponding gear steps of conventional gearboxes. Overall, therefore, the weaknesses are not overly significant. As the selected gearset concept saves up to 2 components compared to 5-speed transmissions, the advantages clearly outweigh the disadvantages.

In a Lepelletier gearset,[5] a conventional planetary gearset and a composite Ravigneaux gearset are combined to reduce both the size and weight as well as the manufacturing costs. Like all transmissions realized with Lepelletier transmissions, the 6L also dispenses with the use of the direct gear ratio and is thus one of the very few automatic transmission concepts without such a ratio.

Applications

Applications
Make Period Model
BMW Group
BMW 2014–2020 i8
2015–present 225xe Active Tourer (F45)
2020–present X1 xDrive 25e (F48)
2020–present X2 xDrive 25e (F39)
Mini 2014–2017 Cooper (F56/55)
2015–2017 Clubman (F54)[lower-alpha 1]
2016–2017 Countryman (F60)[lower-alpha 2]
Fiat Chrysler Automobiles[lower-alpha 3]
Alfa
Romeo 		2005–2011 159[lower-alpha 4]
2005–2010 Brera[lower-alpha 5]
2006–2010 Spider[lower-alpha 6]
Fiat 2005–2011 Croma[lower-alpha 7]
2012–2019 500
Lancia 2008–2014 Delta[lower-alpha 8]
Ford Motor Company
Ford 2005–2007 Five Hundred
2006–2012 Ford Fusion (US)[lower-alpha 9]
2007–2014 Mondeo MkIV[lower-alpha 10]
2006–2014 Galaxy[lower-alpha 11]
Lincoln 2006 Zephyr
2007–2012 MKZ
Mercury 2005–2010 Milan[7]
2005–2007 Montego[7]
General Motors
Cadillac 2005–2010 BLS[lower-alpha 12]
2009–2016 SRX II[lower-alpha 13]
Chevrolet 2008–2016 Cruze[lower-alpha 14]
Opel
Vauxhall 		Astra
Vectra
Signum
Zafira
2008–2017 Insignia
2014–2017 Meriva
Saab 2006–2014 9-3 II (FWD & AWD)[lower-alpha 15]
2013–2014 9-3 III
2010–2012 9-5 II
Hyundai
2006–2014 Veracruz[6]
Jaguar Land Rover
Jaguar 2007–2009 X-Type[lower-alpha 16]
Land
Rover 		2006–2014 Freelander 2
2011–2013 Evoque
Luxgen
2013–2015 S5 2.0 T
2015-2019 S5 ecohyper[lower-alpha 17]
2019–Present S5 GT (GT 225) · 1.8 T
2014–2015 U6[lower-alpha 18]
2015–2018 U6 ecohyper[lower-alpha 19]
2018–Present Luxgen U6 GT (GT 220) 1.8 T
2016–Present Luxgen M7 ecohyper 2.2 T
2016–Present Luxgen U7 ecohyper 2.2 T
2019–Present URX 1.8 T
Mahindra & Mahindra
2015–present XUV 500
Mazda
2005–2008 6 I
2006–2012 CX-7
2006–present CX-9
2006–present MPV III
2007–2012 6 II
PSA Group
Citroën
[lower-alpha 20] 		C4
C5
C6
DS3
DS4
DS5
2010–2016 Jumpy
C-Elysée
Peugeot
[lower-alpha 21] 		2006–2008 307
2014–2018 308
2005–2010 407
2010–present 408 (Saloon)
2011–2018 508
2005–2010 607
2008– 3008
2009– 5008
2010–2016 Expert
Renault
2005–2009 Vel Satis
2006–2010 Espace
Suzuki
2014–present Vitara (FWD & AWD)
2015–present Baleno
2017–present Swift
2017–present SX4 S-Cross
Toyota Group & Lotus
Toyota
[lower-alpha 22] 		2006–2008 Previa (V6)
2007–2018 Camry
2007–2017 Aurion (V6)
2007–2012 Blade (V6)
2007–2013 Mark X Zio (V6)
2008–2016 Highlander
2008–2017 Alphard (V6)
2008–2018 Avalon
2008–2018 RAV4
2009–2017 Venza
2011–2016 Sienna
2017 ProAce
Lexus 2007–2018 ES250 & ES350[lower-alpha 23]
2010–2022 RX[lower-alpha 24]
2015–2021 NX200t[lower-alpha 25]
2019–2023 LM350 (HK)
Lotus 2012 Evora (IPS)
2022– Emira (V6)
Scion 2011–2016 tC
Volkswagen Group
Audi 2003–2013 A3
2015–2018 Q3
Škoda Octavia
Rapid[lower-alpha 26]
VW 2003–2010 Transporter
2007 Jetta
2009–2017 Tiguan
2012–2022 Passat
2019–present Polo (MK5) (India)
Volvo
2005–2014 XC90[7][9][10][11] (FWD & AWD)[lower-alpha 27]
2006–2009 S60[9] (FWD & AWD)[lower-alpha 28]
2006–2008 Volvo V70 II (FWD & AWD)[lower-alpha 29]
2006–2008 XC70 (AWD)
2007–2016 S80 II[10][13] (FWD & AWD)[lower-alpha 30]
2008–2016 V70 III[14] (FWD & AWD)[lower-alpha 31]
2008–2016 XC70 II[10] (FWD & AWD)[lower-alpha 32]
2009–2017 XC60[10] (FWD & AWD)[lower-alpha 33]
2011–2018[10] S60 II (FWD & AWD)[lower-alpha 34]
2016–2017 S90 (FWD)[lower-alpha 35]
2016–2018 V90 (FWD)[lower-alpha 36]
2011–2018 V60 (FWD & AWD)[lower-alpha 37]
2011–2012 S40 II (FWD)[lower-alpha 38]
2011–2012 V50[15] (FWD)[lower-alpha 39]
2011–2013 C30 (FWD)[lower-alpha 40]
2011–2013 C70 II (FWD)
2012–2014 V40 II (FWD)[lower-alpha 41]
  1. ↑ with 3 cylinder engines (B37 · B38)
  2. ↑ with 3 cylinder engines (B37 & B38 FWD)
  3. ↑ Predecessor of Stellantis
  4. ↑ 1.9 JTDm · 2.4 JTDm · 3.2 JTS[6]
  5. ↑ 2.4 JTDm · 3.2 JTS[6]
  6. ↑ 2.4 JTDm · 3.2 JTS[6]
  7. ↑ 1.9 JTDm · 2.4 JTDm
  8. ↑ 1.8 DI Turbo
  9. ↑ 3.5 L V6[7]
  10. ↑ 2.3 118 kW (160 PS) Petrol · 2.0 TDCi Diesel
  11. ↑ 2.3 118 kW (160 PS) Petrol (as standard gearbox)
  12. ↑ 1.9 D · 1.9 D (TST)
  13. ↑ 2.8 L
  14. ↑ US market · 2.0 L Turbo Diesel[1]
  15. ↑ 1.9 TiD · 1.9 TTiD · Aero 2.8 L
  16. ↑ 2.2 d
  17. ↑ 1.8 T · 2.0 T
  18. ↑ 2.0 T[8]
  19. ↑ 1.8 T · 2.0 T
  20. ↑ 1.6 THP · 2.0 HDİ
  21. ↑ 1.6 THP · 2.0 HDİ
  22. ↑ as Toyota U6xx · Toyota U760e
  23. ↑ 250 2012–2018
  24. ↑ 350 older models · 200t/300 new models
  25. ↑ 300 2018–present
  26. ↑ India, 2019 improvement
  27. ↑ D5 & D5 AWD · 3.2 · T6 & V8 AWD[12]
  28. ↑ 2.4 D · D5 & D5 AWD · 2.5 T & R AWD[7] (2006–2008)
  29. ↑ 2.4 D · D5 & D5 AWD · 2.5 T & R AWD (2006–2007)
  30. ↑ D5 & D5 AWD · 2.5 T · 2.5 FT · 3.2 · T6 & V8 AWD
  31. ↑ D4 AWD · D5 & D5 AWD · 2.5 T · 2.5 FT · 3.2 & T6 AWD[14]
  32. ↑ D4 AWD · D5 & D5 AWD · 2.5 T · 2.5 FT · 3.2 & T6 AWD[14]
  33. ↑ D4 AWD · D5 & D5 AWD · T6 AWD
  34. ↑ D5 & D5 AWD · T6 AWD
  35. ↑ D3
  36. ↑ D3
  37. ↑ D3 · D5 & D5 AWD · T6 AWD
  38. ↑ D3 · D4
  39. ↑ D3 · D4
  40. ↑ D3 · D4
  41. ↑ D3 · D4

See also

References

  1. ↑ 1.0 1.1 "GM Engine Original Equipment Manufacturer | GM Powertrain". http://www.gmpowertrain.com/product_guide/REV_FP_2014_Information_Guide_102213.pdf. 
  2. ↑ "Volvo Car Bookstore". https://www.volvotechinfo.com/index.cfm?event=viewFile&filename=ReleaseNewsVIDA2014C.pdf&hash=EEA99E460619945AD28D8979F7BDF452. 
  3. ↑ "Archived copy". http://citroen-de-de.custhelp.com/euf/assets/images/allemagne/citroen/Wartungshefte/2006/cs9006-2_de.pdf. 
  4. ↑ "Archived copy". http://www.atraonline.com/gears/2008/2008-08/2008_8_6.pdf. 
  5. ↑ 5.0 5.1 5.2 Riley, Mike (2013-09-01). "Lepelletier Planetary System" (in en-US). https://www.transmissiondigest.com/lepelletier-planetary-system/. 
  6. ↑ 6.0 6.1 6.2 6.3 "Replacement Aisin Warner TCC Linear Solenoid with Black Connector" (in en). Rostra Powertrain Controls. http://www.rostratransmission.com/replacement-aisin-warner-tcc-linear-solenoid-with-black-connector.php. 
  7. ↑ 7.0 7.1 7.2 7.3 7.4 "Archived copy" (in en). http://www.atraonline.com/gears/2010/2010-08/2010_8_6.pdf. 
  8. ↑ "LUXGEN U6 VIETNAM" (in vi). http://luxgen-motor.vn/mau-xe/luxgen-u6.html. 
  9. ↑ 9.0 9.1 "Volvo Car USA, LLC. Bookstore:RTJ21096-2009-06-10" (in en). https://www.volvotechinfo.com/index.cfm?event=item.getItem&item=RTJ21096-2009-06-10. 
  10. ↑ 10.0 10.1 10.2 10.3 10.4 "Volvo Car USA, LLC. Bookstore:TJ26840-2014-11-06" (in en). https://www.volvotechinfo.com/index.cfm?event=item.getItem&item=TJ26840-2014-11-06. 
  11. ↑ "Kraftstoffbetriebene Heizung, D5244T, TF-80SC" (in en, de). Volvo Car Customer Service. http://accessories.volvocars.com/de-de/XC90/InstallationInstruction/Document/VCC-297089-1/2007/D5%20AWD/Automatic/default/NOTHING. 
  12. ↑ "437: Transmission control module (TCM), TF-80SC AWD" (in en). Volvo Car Corporation. 23 December 2013. http://www.pennantmotors.com/personal/xc90/xc90trans3.pdf. 
  13. ↑ Volvo Car Corporation (2008). "Models - S80 - Technical Data - Volvo Car UK Media Newsroom" (in en). https://www.media.volvocars.com/uk/en-gb/models/s80/2009/specifications. 
  14. ↑ 14.0 14.1 14.2 "Volvo Car USA, LLC. Bookstore:RTJ20857-2009-04-15" (in en). Volvo Cars of North America. 15 April 2009. https://www.volvotechinfo.com/index.cfm?event=item.getItem&item=RTJ20857-2009-04-15. 
  15. ↑ "Volvo V50 owner's manual (MY12)". Volvo Car Corporation. 2011. p. 312. http://az685612.vo.msecnd.net/pdfs/697dad82f9e38155435b82dfcdcdd95197121416/V50_owners_manual_MY12_DE_tp14038.pdf.  · German: Volvo V50 Betriebsanleitung (Modelljahr 2012)

Notes



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