AWTF-80 SC
{{short description|Motor vehicle automatic transmission models}}
{{Use dmy dates|date=August 2022}}
{{Infobox automobile
| name = AWTF-80 SC
| production = 2005 – 2019
| model_years = 2005 – 2019
| image =
| caption =
| manufacturer = Aisin Seiki
| class = 6-Speed Transverse Automatic Transmission
| successor = Aisin-Toyota 8-speed
| related = Ford 6R
GM 6L
ZF 6HP
}}
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,{{Cite web| url=http://www.gmpowertrain.com/product_guide/REV_FP_2014_Information_Guide_102213.pdf|title=GM Engine Original Equipment Manufacturer | GM Powertrain|access-date=2015-09-16|archive-date=2015-09-24|archive-url=https://web.archive.org/web/20150924022723/http://www.gmpowertrain.com/product_guide/REV_FP_2014_Information_Guide_102213.pdf|url-status=live}} and is also called TF-80SC{{cite web| url=https://www.volvotechinfo.com/index.cfm?event=viewFile&filename=ReleaseNewsVIDA2014C.pdf&hash=EEA99E460619945AD28D8979F7BDF452 | title=Volvo Car Bookstore | access-date=2015-09-13 | archive-date=2015-03-26 | archive-url=https://web.archive.org/web/20150326130122/https://www.volvotechinfo.com/index.cfm?event=viewFile&filename=ReleaseNewsVIDA2014C.pdf&hash=EEA99E460619945AD28D8979F7BDF452 | url-status=live }} (AWF21), AF40-6, AM6,{{Cite web| url=http://citroen-de-de.custhelp.com/euf/assets/images/allemagne/citroen/Wartungshefte/2006/cs9006-2_de.pdf |title=Archived copy |access-date=2017-06-04 |archive-date=2021-03-04 |archive-url=https://web.archive.org/web/20210304233730/http://citroen-de-de.custhelp.com/euf/assets/images/allemagne/citroen/Wartungshefte/2006/cs9006-2_de.pdf |url-status=dead }} AW6A-EL and TF-81SC (AF21).{{cite web| url=http://www.atraonline.com/gears/2008/2008-08/2008_8_6.pdf |title=Archived copy |access-date=2015-01-02 |url-status=dead |archive-url=https://web.archive.org/web/20160304122443/http://www.atraonline.com/gears/2008/2008-08/2008_8_6.pdf |archive-date=2016-03-04 }} All-wheel drive transfer cases can be fitted to the AWTF-80 SC.
It uses a Lepelletier gear mechanism,{{Cite web| last=Riley |first=Mike |date=2013-09-01 |title=Lepelletier Planetary System |url=https://www.transmissiondigest.com/lepelletier-planetary-system/ |access-date=2023-03-03 |website=Transmission Digest |language=en-US |archive-date=2023-06-21 |archive-url=https://web.archive.org/web/20230621163418/https://www.transmissiondigest.com/lepelletier-planetary-system/ |url-status=live }} 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.
class="wikitable collapsible" style="text-align:center"
|+ Gear Ratios{{efn|Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage}} ! {{diagonal split header|Model|Gear}} ! R ! 1 ! 2 ! 3 ! 4 ! 5 ! 6 ! Total ! Span ! Avg. ! Compo- |
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Aisin AWTF-80 2005 | {{round |
---|
112/33|3}}
| {{round|112/27|3}} | {{round|64/27|3}} | {{round|14/9|3}} | {{round|112/97|3}} | {{round|336/391|3}} | {{round|24/35|3}} | {{round|112/27*35/24|3}} | {{round|(112/27*24/35)^(1/2)|3}} | {{round|(112/27*35/24)^(1/5)|3}} |rowspan=3| 3 Gearsets |
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ZF 6HP All · 2000{{efn|first transmission to use this 6-speed gearset concept}}
| {{round |
4590/1349|3}}
| {{round|9180/2201|3}} | {{round|211140/90241|3}} | {{round|108/71|3}} | {{round|9180/8033|3}} | {{round|9180/10586|3}} | {{round|85/123|3}} | {{round|9180/2201*123/85|3}} | {{round|(9180/2201*85/123)^(1/2)|3}} | {{round|(9180/2201*123/85)^(1/5)|3}} |
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Specifications
= Basic concept =
A conventional 5-pinion planetary gearset and a compound Ravigneaux gearset is combined in a Lepelletier gear mechanism, 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.
= 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.{{Citation needed|date=June 2023}}
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|+ Features |
Maximum shift speed
| 7,000/min | 6,500/min |
---|
Maximum torque
| {{convert|350|Nm|lbft|0|abbr=on|lk=on}} | {{convert|400|Nm|lbft|0|abbr=on|lk=on}} |
Torque converter diameter
|colspan=2| {{convert|260|mm|in|1|abbr=on|lk=on}} |
Length
|colspan=2| {{convert|358|mm|in|1|abbr=on|lk=on}} |
Weight
|colspan=2| {{convert|90|kg|lb|0|abbr=on|lk=on}} |
class="wikitable collapsible" style="text-align:center"
|+ Gear Ratio Analysis !rowspan=2 colspan=2| With Assessment{{efn|The AWTF80 SC-transmission is based on the Lepelletier gear mechanism, first realized in the ZF 6HP gearbox}}{{efn|name=other|Other gearboxes using the Lepelletier gear mechanism see infobox}} !colspan=3| Planetary Gearset: Teeth{{efn|Layout
!rowspan=2| Count !rowspan=2| Total{{efn|Total Ratio Span (Total Ratio Spread · Total Gear Ratio)
!rowspan=2| Avg.{{efn|Average Gear Step
|
Simple
!colspan=2| Ravigneaux |
---|
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Model
! Version ! S1{{efn|Sun 1: sun gear of gearset 1}} ! S2{{efn|Sun 2: sun gear of gearset 2: inner Ravigneaux gearset}} ! S3{{efn|Sun 3: sun gear of gearset 3: outer Ravigneaux gearset}} ! Brakes ! Ratio ! Gear
|
style="font-style:italic;"
! Gear ! R ! 1 ! 2 ! 3 ! 4 ! 5 ! 6 |
Step{{efn|name=50:50}}
! {{efn|name=R:1|Standard R:1
! ! {{efn|name=1:2|Standard 1:2
! ! ! ! |
Δ Step{{efn|name=LS|From large to small gears (from right to left)}}{{efn|name=step|Standard STEP — From Large To Small Gears: Steady And Progressive Increase In Gear Steps —
!style="background:#DDF;"| !style="background:#DDF;"| ! ! ! ! !style="background:#DDF;"| |
Shaft Speed ! ! ! ! ! ! ! |
Δ Shaft Speed{{efn|name=speed|Standard SPEED — From Small To Large Gears: Steady Increase In Shaft Speed Difference —
! ! ! ! ! ! ! |
colspan=8 style="background:#AAF;"| |
Aisin AWTF-80 SC | 50 | 36 | 44 | 2 | {{round|112/27*35/24|4}} | style="background:#FFC;"|{{round|(112/27*35/24)^(1/5)|4}}{{efn|name=50:50}} |
style="font-style:italic;"
! Gear | {{font color|red|{{round |
112/33|4}}{{efn|name=R:1}} }} | {{round|112/27|4}} | {{font color|red|{{round|64/27|4}}{{efn|name=1:2}} | {{round|14/9|4}} | {{font color|red|{{round|112/97|4}}{{efn|name=step}} | {{round|336/391|4}} | {{font color|red|{{round|24/35|4}}{{efn|name=speed}} |
Step
| {{font color|red|0.8182}}{{efn|name=R:1}} ! 1.0000 |style="background:#FFC;"| {{font color|red|1.7500{{efn|name=1:2}}}} |style="background:#FFC;"| 1.5238 |style="background:#FFC;"| {{font color|red|1.3472}} |style="background:#FFC;"| 1.3436 |style="background:#FFC;"| 1.2532 |
Δ Step{{efn|name=LS}}
|style="background:#DDF;"| |style="background:#DDF;"| |style="background:#DFD;"| 1.1484 |style="background:#DFD;"| 1.1311 |style="background:#DFD;"| {{font color|red|1.0027}}{{efn|name=step}} |style="background:#DFD;"| 1.0722 |style="background:#DDF;"| |
Speed
| {{font color|red |
1.2222}}
! 1.0000 | 1.7500 | 2.6667 | 3.5926 | 4.8272 | {{font color|red|6.0494}} |
Δ Speed
| {{font color|red|1.2222}} ! 1.0000 |style="background:#DFD;"| 0.7500 |style="background:#DFD;"| 0.9167 |style="background:#DFD;"| 0.9259 |style="background:#DFD;"| 1.2346 |style="background:#DFD;"| {{font color|red|1.2222}}{{efn|name=speed}} |
colspan=8 style="background:#AAF;"| |
ZF 6HP
| All{{efn|name=other}} · 2000{{efn|First gearbox on the market to use the Lepelletier gear mechanism | 37 | 31 | 38 | 2 | {{round|9180/2201*123/85|4}} |style="background:#FFC;"| {{round|(9180/2201*123/85)^(1/5)|4}}{{efn|name=50:50}} |
style="font-style:italic;"
! Gear | {{font color|red|{{round |
4590/1349|4}}{{efn|name=R:1}} }} | {{round|9180/2201|4}} | {{font color|red|{{round|211140/90241|4}}{{efn|name=1:2}} | {{round|108/71|4}} | {{font color|red|{{round|9180/8033|4}}{{efn|name=step}}{{efn|name=speed}} | {{round|4590/5293|4}} | {{round|85/123|4}} |
Step
| {{font color|red|0.8158}}{{efn|name=R:1}} ! 1.0000 |style="background:#FFC;"| {{font color|red|1.7826{{efn|name=1:2}}}} |style="background:#FFC;"| 1.5382 |style="background:#FFC;"| {{font color|red|1.3311}} |style="background:#FFC;"| 1.3178 |style="background:#FFC;"| 1.2549 |
Δ Step{{efn|name=LS}}
|style="background:#DDF;"| |style="background:#DDF;"| |style="background:#DFD;"| 1.1589 |style="background:#DFD;"| 1.1559 |style="background:#DFD;"| {{font color|red|1.0101}}{{efn|name=step}} |style="background:#DFD;"| 1.0502 |style="background:#DDF;"| |
Speed
| {{font color|red |
1.2258}}
! 1.0000 | 1.7826 | 2.7419 | {{font color|red|3.6497}} | 4.8096 | 6.0354 |
Δ Speed
| {{font color|red|1.2258}} ! 1.0000 |style="background:#DFD;"| 0.7826 |style="background:#DFD;"| 0.9593 |style="background:#DFD;"| {{font color|red|0.9078}}{{efn|name=speed}} |style="background:#DFD;"| 1.1599 |style="background:#DFD;"| 1.2258 |
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style="font-style:italic;"
! Ratio | |colspan=2| |colspan=2| |colspan=2| |
style="font-style:italic;"
! Ratio |colspan=2| |colspan=2| |colspan=2| | |
colspan=8| Algebra And Actuated Shift Elements |
Brake A{{efn|Blocks R2 and S3}}
| | ❶ | ❶ | ❶ | ❶ | | |
Brake B{{efn|Blocks C2 (carrier 2) and C3 (carrier 3)}}
| ❶ | | | ❶ | | ❶ | |
Clutch C{{efn|Couples C1 (carrier 1) and S2}}
| | | ❶ | | | | ❶ |
Clutch D{{efn|Couples C1 (carrier 1) with R2 and S3}}
| ❶ | ❶ | | | | | |
Clutch E{{efn|Couples R1 with C2 (carrier 2) and C3 (carrier 3)}}
| | | | | ❶ | ❶ | ❶ |
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Applications
See also
References
{{Reflist}}
External links
- [https://web.archive.org/web/20110629105820/http://www.mathworks.com/help/toolbox/physmod/drive/a1060120137.html Block Reference (SimDriveline Version 1)]
- [https://web.archive.org/web/20071225125818/http://www.aisin-aw.co.jp/en/02products/02at/01ff/index.html#ff6speed AISIN AW CO., LTD./For FWD Vehicle AT]
- [http://www.altousa.com/np147.pdf Alto Products Corp.]
- [https://web.archive.org/web/20100215130053/http://www.aw-europe.be/napa/files/drivingInnovation_automaticTransmission_1182180053307_4.pdf Driving innovation] Wayback Machine