AWTF-80 SC
Motor vehicle automatic transmission models
Motor vehicle
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.
Gear Ratios[ a]
Gear
Model
R
1
2
3
4
5
6
Total Span
Span Center
Avg. Step
Compo- nents
Aisin AWTF-80 2005
−3.394
4.148
2.370
1.556
1.155
0.859
0.686
6.049
1.687
1.433
3 Gearsets 2 Brakes 3 Clutches
ZF 6HP All · 2000[ b]
−3.403
4.171
2.340
1.521
1.143
0.867
0.691
6.035
1.698
1.433
^ Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage
^ for comparison purposes only
Specifications
Basic concept
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 .
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 ]
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 )
Gear Ratios
With Assessment[ a] [ b]
Planetary Gearset: Teeth[ c] Lepelletier Gear Mechanism
Count
Total[ d] Center[ e]
Avg.[ f]
Simple
Ravigneaux
Model
Version First Delivery
S1 [ g] R1 [ h]
S2 [ i] R2 [ j]
S3 [ k] R3 [ l]
Brakes Clutches
Ratio Span
Gear Step[ m]
Gear Ratio
R
i
R
{\displaystyle {i_{R}}}
1
i
1
{\displaystyle {i_{1}}}
2
i
2
{\displaystyle {i_{2}}}
3
i
3
{\displaystyle {i_{3}}}
4
i
4
{\displaystyle {i_{4}}}
5
i
5
{\displaystyle {i_{5}}}
6
i
6
{\displaystyle {i_{6}}}
Step[ m]
− − -->
i
R
i
1
{\displaystyle -{\tfrac {i_{R}}{i_{1}}}}
[ n]
i
1
i
1
{\displaystyle {\tfrac {i_{1}}{i_{1}}}}
i
1
i
2
{\displaystyle {\tfrac {i_{1}}{i_{2}}}}
[ o]
i
2
i
3
{\displaystyle {\tfrac {i_{2}}{i_{3}}}}
i
3
i
4
{\displaystyle {\tfrac {i_{3}}{i_{4}}}}
i
4
i
5
{\displaystyle {\tfrac {i_{4}}{i_{5}}}}
i
5
i
6
{\displaystyle {\tfrac {i_{5}}{i_{6}}}}
Δ Step[ p] [ q]
i
1
i
2
:
i
2
i
3
{\displaystyle {\tfrac {i_{1}}{i_{2}}}:{\tfrac {i_{2}}{i_{3}}}}
i
2
i
3
:
i
3
i
4
{\displaystyle {\tfrac {i_{2}}{i_{3}}}:{\tfrac {i_{3}}{i_{4}}}}
i
3
i
4
:
i
4
i
5
{\displaystyle {\tfrac {i_{3}}{i_{4}}}:{\tfrac {i_{4}}{i_{5}}}}
i
4
i
5
:
i
5
i
6
{\displaystyle {\tfrac {i_{4}}{i_{5}}}:{\tfrac {i_{5}}{i_{6}}}}
Shaft Speed
i
1
i
R
{\displaystyle {\tfrac {i_{1}}{i_{R}}}}
i
1
i
1
{\displaystyle {\tfrac {i_{1}}{i_{1}}}}
i
1
i
2
{\displaystyle {\tfrac {i_{1}}{i_{2}}}}
i
1
i
3
{\displaystyle {\tfrac {i_{1}}{i_{3}}}}
i
1
i
4
{\displaystyle {\tfrac {i_{1}}{i_{4}}}}
i
1
i
5
{\displaystyle {\tfrac {i_{1}}{i_{5}}}}
i
1
i
6
{\displaystyle {\tfrac {i_{1}}{i_{6}}}}
Δ Shaft Speed[ r]
0
− − -->
i
1
i
R
{\displaystyle 0-{\tfrac {i_{1}}{i_{R}}}}
i
1
i
1
− − -->
0
{\displaystyle {\tfrac {i_{1}}{i_{1}}}-0}
i
1
i
2
− − -->
i
1
i
1
{\displaystyle {\tfrac {i_{1}}{i_{2}}}-{\tfrac {i_{1}}{i_{1}}}}
i
1
i
3
− − -->
i
1
i
2
{\displaystyle {\tfrac {i_{1}}{i_{3}}}-{\tfrac {i_{1}}{i_{2}}}}
i
1
i
4
− − -->
i
1
i
3
{\displaystyle {\tfrac {i_{1}}{i_{4}}}-{\tfrac {i_{1}}{i_{3}}}}
i
1
i
5
− − -->
i
1
i
4
{\displaystyle {\tfrac {i_{1}}{i_{5}}}-{\tfrac {i_{1}}{i_{4}}}}
i
1
i
6
− − -->
i
1
i
5
{\displaystyle {\tfrac {i_{1}}{i_{6}}}-{\tfrac {i_{1}}{i_{5}}}}
Aisin AWTF-80 SC
450 N⋅m (332 lb⋅ft ) 2005[ 6]
50 90
3644
44 96
2 3
6.0494 1.6865
1.4333[ m]
Gear Ratio
−3.3939[ n]
− − -->
112
33
{\displaystyle -{\tfrac {112}{33}}}
4.1481
112
27
{\displaystyle {\tfrac {112}{27}}}
2.3704[ o]
64
27
{\displaystyle {\tfrac {64}{27}}}
1.5556
14
9
{\displaystyle {\tfrac {14}{9}}}
1.1546[ q]
112
97
{\displaystyle {\tfrac {112}{97}}}
0.8593
336
391
{\displaystyle {\tfrac {336}{391}}}
0.6857[ r]
24
35
{\displaystyle {\tfrac {24}{35}}}
Step
0.8182 [ n]
1.0000
1.7500[ o]
1.5238
1.3472
1.3436
1.2532
Δ Step[ p]
1.1484
1.1311
1.0027 [ q]
1.0722
Speed
-1.2222
1.0000
1.7500
2.6667
3.5926
4.8272
6.0494
Δ Speed
1.2222
1.0000
0.7500
0.9167
0.9259
1.2346
1.2222 [ r]
ZF 6HP
All[ b] · 2000[ s]
37 71
3138
38 85
2 3
6.0354 1.6977
1.4327[ m]
Gear Ratio
−3.4025[ n]
− − -->
4
,
590
1
,
349
{\displaystyle -{\tfrac {4,590}{1,349}}}
4.1708
9
,
180
2
,
201
{\displaystyle {\tfrac {9,180}{2,201}}}
2.3397 [ o]
211
,
140
90
,
241
{\displaystyle {\tfrac {211,140}{90,241}}}
1.5211
108
71
{\displaystyle {\tfrac {108}{71}}}
1.1428[ q] [ r]
9
,
180
8
,
033
{\displaystyle {\tfrac {9,180}{8,033}}}
0.8672
4
,
590
5
,
293
{\displaystyle {\tfrac {4,590}{5,293}}}
0.6911
85
123
{\displaystyle {\tfrac {85}{123}}}
Step
0.8158 [ n]
1.0000
1.7826 [ o]
1.5382
1.3311
1.3178
1.2549
Δ Step[ p]
1.1589
1.1559
1.0101 [ q]
1.0502
Speed
-1.2258
1.0000
1.7826
2.7419
3.6497
4.8096
6.0354
Δ Speed
1.2258
1.0000
0.7826
0.9593
0.9078 [ r]
1.1599
1.2258
Ratio R & Even
− − -->
R
3
(
S
1
+
R
1
)
R
1
S
3
{\displaystyle -{\tfrac {R_{3}(S_{1}+R_{1})}{R_{1}S_{3}}}}
R
3
(
S
1
+
R
1
)
(
S
2
+
R
2
)
R
1
S
2
(
S
3
+
R
3
)
{\displaystyle {\tfrac {R_{3}(S_{1}+R_{1})(S_{2}+R_{2})}{R_{1}S_{2}(S_{3}+R_{3})}}}
R
2
R
3
(
S
1
+
R
1
)
R
2
R
3
(
S
1
+
R
1
)
− − -->
S
1
S
2
S
3
{\displaystyle {\tfrac {R_{2}R_{3}(S_{1}+R_{1})}{R_{2}R_{3}(S_{1}+R_{1})-S_{1}S_{2}S_{3}}}}
R
3
S
3
+
R
3
{\displaystyle {\tfrac {R_{3}}{S_{3}+R_{3}}}}
Ratio Odd
R
2
R
3
(
S
1
+
R
1
)
R
1
S
2
S
3
{\displaystyle {\tfrac {R_{2}R_{3}(S_{1}+R_{1})}{R_{1}S_{2}S_{3}}}}
S
1
+
R
1
R
1
{\displaystyle {\tfrac {S_{1}+R_{1}}{R_{1}}}}
R
3
(
S
1
+
R
1
)
R
3
(
S
1
+
R
1
)
+
S
1
S
3
{\displaystyle {\tfrac {R_{3}(S_{1}+R_{1})}{R_{3}(S_{1}+R_{1})+S_{1}S_{3}}}}
Algebra And Actuated Shift Elements
Brake A[ t]
❶
❶
❶
❶
Brake B[ u]
❶
❶
❶
Clutch C[ v]
❶
❶
Clutch D[ w]
❶
❶
Clutch E[ x]
❶
❶
❶
^ The AWTF80 SC-transmission is based on the Lepelletier gear mechanism , first realized in the ZF 6HP gearbox
^ a b Other gearboxes using the Lepelletier gear mechanism see infobox
^ Layout
Input and output are on opposite sides
Planetary gearset 1 is on the input (turbine) side
Input shafts are R1 and, if actuated, C2 /C3 (the combined carrier of the compound Ravigneaux gearset 2 and 3)
Output shaft is R3 (ring gear of gearset 3: outer Ravigneaux gearset)
^ Total Ratio Span (Total Ratio Spread · Total Gear Ratio)
i
n
i
1
{\displaystyle {\tfrac {i_{n}}{i_{1}}}}
A wider span enables the
downspeeding when driving outside the city limits
increase the climbing ability
when driving over mountain passes or off-road
or when towing a trailer
^ Ratio Span's Center
(
i
n
i
1
)
1
2
{\displaystyle (i_{n}i_{1})^{\tfrac {1}{2}}}
The center indicates the speed level of the transmission
Together with the final drive ratio
it gives the shaft speed level of the vehicle
^ Average Gear Step
(
i
n
i
1
)
1
n
− − -->
1
{\displaystyle ({\tfrac {i_{n}}{i_{1}}})^{\tfrac {1}{n-1}}}
With decreasing step width
the gears connect better to each other
shifting comfort increases
^ Sun 1: sun gear of gearset 1
^ Ring 1: ring gear of gearset 1
^ Sun 2: sun gear of gearset 2: inner Ravigneaux gearset
^ Ring 2: ring gear of gearset 2: inner Ravigneaux gearset
^ Sun 3: sun gear of gearset 3: outer Ravigneaux gearset
^ Ring 3: ring gear of gearset 3: outer Ravigneaux gearset
^ a b c d Standard 50:50 — 50 % Is Above And 50 % Is Below The Average Gear Step —
With steadily decreasing gear steps (yellow highlighted line Step )
and a particularly large step from 1st to 2nd gear
the lower half of the gear steps (between the small gears; rounded down, here the first 2) is always larger
and the upper half of the gear steps (between the large gears; rounded up, here the last 3) is always smaller
than the average gear step (cell highlighted yellow two rows above on the far right)
lower half: smaller gear steps are a waste of possible ratios (red bold)
upper half: larger gear steps are unsatisfactory (red bold)
^ a b c d e Standard R:1 — Reverse And 1st Gear Have The Same Ratio —
The ideal reverse gear has the same transmission ratio as 1st gear
no impairment when maneuvering
especially when towing a trailer
a torque converter can only partially compensate for this deficiency
Plus 11.11 % minus 10 % compared to 1st gear is good
Plus 25 % minus 20 % is acceptable (red)
Above this is unsatisfactory (bold)
^ a b c d e Standard 1:2 — Gear Step 1st To 2nd Gear As Small As Possible —
With continuously decreasing gear steps (yellow marked line Step )
the largest gear step is the one from 1st to 2nd gear, which
for a good speed connection and
a smooth gear shift
must be as small as possible
A gear ratio of up to 1.6667:1 (5:3) is good
Up to 1.7500:1 (7:4) is acceptable (red)
Above is unsatisfactory (bold)
^ a b c From large to small gears (from right to left)
^ a b c d e Standard STEP — From Large To Small Gears: Steady And Progressive Increase In Gear Steps —
Gear steps should
increase: Δ Step (first green highlighted line Δ Step ) is always greater than 1
As progressive as possible: Δ Step is always greater than the previous step
Not progressively increasing is acceptable (red)
Not increasing is unsatisfactory (bold)
^ a b c d e Standard SPEED — From Small To Large Gears: Steady Increase In Shaft Speed Difference —
Shaft speed differences should
increase: Δ Shaft Speed (second line marked in green Δ (Shaft) Speed ) is always greater than the previous one
1 difference smaller than the previous one is acceptable (red)
2 consecutive ones are a waste of possible ratios (bold)
^ First gearbox on the market to use the Lepelletier gear mechanism for comparison purposes only
^ Blocks R2 and S3
^ Blocks C2 (carrier 2) and C3 (carrier 3)
^ Couples C1 (carrier 1) and S2
^ Couples C1 (carrier 1) with R2 and S3
^ Couples R1 with C2 (carrier 2) and C3 (carrier 3)
Applications
See also
References
^ a b "GM Engine Original Equipment Manufacturer | GM Powertrain" (PDF) . Archived (PDF) from the original on 24 September 2015. Retrieved 16 September 2015 .
^ "Volvo Car Bookstore" . Archived from the original on 26 March 2015. Retrieved 13 September 2015 .
^ "Archived copy" (PDF) . Archived from the original (PDF) on 4 March 2021. Retrieved 4 June 2017 .{{cite web }}
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^ "Archived copy" (PDF) . Archived from the original (PDF) on 4 March 2016. Retrieved 2 January 2015 .{{cite web }}
: CS1 maint: archived copy as title (link )
^ Riley, Mike (1 September 2013). "Lepelletier Planetary System" . Transmission Digest . Archived from the original on 21 June 2023. Retrieved 3 March 2023 .
^ Kasuya, Satoru; Taniguchi, Takao; Tsukamoto, Kazumasa; Hayabuchi, Masahiro; Nishida, Masaaki; Suzuki, Akitomo; Niki, Hiroshi (2005). "AISIN AW New High Torque Capacity 6-Speed Automatic Transmission for FWD vehicles" . SAE Transactions . 114 : 1193–1201. ISSN 0096-736X . JSTOR 44725152 . Archived from the original on 20 July 2020. Retrieved 9 July 2020 .
^ a b c d "Replacement Aisin Warner TCC Linear Solenoid with Black Connector" . Rostra Powertrain Controls. Archived from the original on 22 May 2018. Retrieved 16 January 2019 .
^ a b c d e "Archived copy" (PDF) . Archived from the original (PDF) on 4 March 2016. Retrieved 16 September 2015 .{{cite web }}
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^ a b "Volvo Car USA, LLC. Bookstore:RTJ21096-2009-06-10" . www.volvotechinfo.com . Archived from the original on 4 March 2016. Retrieved 26 November 2017 .
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^ "Kraftstoffbetriebene Heizung, D5244T, TF-80SC" [Fuel powered heater, D5244T, TF-80SC] (Accessory installation instructions) (in English and German). Volvo Car Customer Service. Archived from the original on 25 February 2018. Retrieved 25 February 2018 .
^ "437: Transmission control module (TCM), TF-80SC AWD" (PDF) . Volvo Car Corporation. 23 December 2013. Archived (PDF) from the original on 25 February 2018. Retrieved 25 February 2018 .
^ Volvo Car Corporation (2008). "Models - S80 - Technical Data - Volvo Car UK Media Newsroom" . Archived from the original on 4 March 2016. Retrieved 13 September 2015 .
^ a b c "Volvo Car USA, LLC. Bookstore:RTJ20857-2009-04-15" . www.volvotechinfo.com . Volvo Cars of North America. 15 April 2009. Archived from the original on 25 February 2018. Retrieved 25 February 2018 .
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External links