JATCO DECEMBER 2011.pdf
Transcript of JATCO DECEMBER 2011.pdf
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Competitiveness of CVTs in terms of Fuel Economy and Drivability
Hirofumi MICHIOKAProject Promotion OfficeJATCO Ltd.
8th/ December/ 2011International Automotive congress
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Market diffusion of CVTs and reasons
How CVT-equipped vehicles are driven and performance requirements
JATCO’s efforts to improve CVT competitiveness
①Fuel economy performance
CVT competitiveness in the future
Contents
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Source: IHS Automotive Q2 2011 & Jatco’s analysis
Volu
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DCTAMT
CVT
8AT
7AT
6AT
5AT
4AT3AT
9AT
Global demand forecast( front-drive 2-pedal transmission vehicles)
HEV(Full+Mild)
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・Increase in ATwith diffusion of DCT and AMT
USA
Japan Europe・Replaced by CVT
・Replaced by6 speed AT
China ・Increase in DCT, CVT and 6 speed AT
3-5 AT
6 AT3-5 AT
CVT
3-5 AT
DCT&AMT
DCT&AMTCVT
These forecasts are based on IHS Automotive (CSM) 2011 data.
6 AT 8-9 AT
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mill
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Volu
me [
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Market-specific demand forecasts(front-drive 2-pedal transmission vehicles)
6 AT
3-5 AT
DCT&AMT
CVT
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Market diffusion of CVTs and reasons
How CVT-equipped vehicles are driven and performance requirements
JATCO’s efforts to improve CVT competitiveness
①Fuel economy performance
CVT competitiveness in the future
Contents
All rights reserved “JATCO Ltd”; We reserve all distribution rights such as copying and sharing with third parties.
Engine Revolution
Engin
eTorq
ue
BSFC
DCTDCT or step ATor step AT
BSFC: Brake Specific Fuel Consumption
Driving mode : NEDC
CVTCVT
Best FC Area
OptimalPower Line
Flexibility – Engine Operating Efficiency
CVT competitiveness
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Mt. roadMt. road
Mt. highwayMt. highway
Congested roadCongested road
Suburban roadSuburban road
Flatland highwayFlatland highway
Urban roadUrban roadWavy roadWavy road
Muddy roadMuddy road
Uphill roadUphill road
Unpaved roadUnpaved roadDesert trailDesert trail
Slushy roadSlushy road
Surveys of real-world requirements
Real-world requirements for transmissions are identified by classifying actual road environments and conducting driving tests on each type.
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vsp[km/h]×acc[m/
Vehicle speed
a) Acceleration is low.
B) Deceleration is high.
Acceleration
Deceleration
Accele
ration
Ex: Newly emerging country
Ex: Advanced nation
Example:Acceleration distribution
Acceleration
Deceleration
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City
Suburb
Hig
hw
ay
RUS JPN USA EURCHN
+
Acce
lera
tion
Vs
+
Acce
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Vs
+
Acce
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Vs
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tion
Vs
+
Acce
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tion
Vs
Drivability focus: acceleration distribution
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Drivability focus: driving speed distribution City
Suburb
Hig
hw
ay
RUS 2011
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Km/h
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Km/h
Freq
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Km/h Km/h
Km/h Km/h
Km/h Km/h
JPN USA EUR2007
2007
2007
TIDA1.5 + CVT1 VERSA1.8 + CK1 NOTE1.6 + AYMicra1.4 + AYRCHN
Km/h
Km/h
Km/h
Freq
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Freq
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Km/h
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2009
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Driving speed
Road g
rade
Severe
SevereMt. roadMt. road
Flatland highwayFlatland highway
Mt. highwayMt. highway
Performance assurance study(thermal performance design)
EUREUR
USAUSA
MEXMEX
JPNJPN
PRCPRC
RUSRUS
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Market diffusion of CVTs and reasons
How CVT-equipped vehicles are driven and performance requirements
JATCO’s efforts to improve CVT competitiveness
①Fuel economy performance
CVT competitiveness in the future
Contents
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1. Tightening of regulations on CO2 emissions and fueleconomy in every market
→Improvement of CVT efficiency and weight reductions
2. Change in road conditions in China and other emerging markets through construction of highway network
→Greater demand for better fuel economy at higher driving speeds
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0 50 100 1500%
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0 50 100 150
Highway Km/h
Fre
q
<2004> <2009>
Fuel economy performance
Km/h
Fre
q
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Addition of cold-start fuel economy mode
Greater demand for betterfuel economy at
higher driving speeds
Reduction of friction
Reduction of hydraulic pressure by expanding the area of pulley piston
Reduction of churningresistance
Addition of heater to raiseCVT fluid temp. quickly
Lockup at lower temp.
Idling stop & neutral idle control
Downsizing of partsSmaller, lighter CVTs Adoption of auxiliary transmission
<Requirements> <Measures>
Expansion of gearratio range
Fuel economy performance
Start and stop mode
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Key technologies for the new CVT
world's highest transmission ratio
Compact, 13% lighter and offering higher fuel efficiency
These technologies reduce size and weight and improve fuelefficiency.
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2
5
3Total length is 10% less
Higher fuel efficiency
Wider lock-up area supports higher fuel efficiency
Friction reduced by 30% for higher fuel efficiency
The world's first CVT with auxiliary
transmission
Smaller pulleys
Ultra-flat torque converter
6 Flexible lock-up damperLess fluid churning
Integration of clutchand sub planetary gear4
7 More efficient oil pump
Total length is 10% less
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NISSANTIIDA
NISSANNOTE
NISSANWINGROADJF009E
180Nm
NISSANCUBE
RENAULT SAMSUNGSM3
Major models equipped with JATCO CVT
JF010E350Nm
NISSANALTIMA(in USA)
NISSANELGRAND
MITSUBISHIOUTLANDER
JEEP PATRIOTNISSANSENTRA
JF011E250Nm
NISSANDUALIS
NISSANX-TRAIL
MITSUBISHIGALANT FORTIS
NISSANSERENA
RENAULTMEGANE
RENAULTKOLEOS
SUZUKIKIZASHI
JEEP COMPASS
JF015E150Nm
NISSANROOX
SUZUKIALTO
NISSANJUKE
NISSANMARCH
SUZUKISWIFT
SUZUKISPLASH
RENAULT SAMSUNGSM5 (in Korea)
NISSANTIIDA(in China)
NISSANSUNNY(in China)
SUZUKISOLIO
SUZUKILAPIN
NISSANMOCO
NISSANMAXIMA(in USA)
NISSANTEANA
NISSANMURANO
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All rights reserved “JATCO Ltd”; We reserve all distribution rights such as copying and sharing with third parties. 17
Market diffusion of CVTs and reasonsHow CVT-equipped vehicles are driven
and performance requirementsJATCO’s efforts to improve CVT
competitiveness①Fuel economy performance
CVT competitiveness in the future
Contents
All rights reserved “JATCO Ltd”; We reserve all distribution rights such as copying and sharing with third parties.
CVT competitiveness in the future
Fle
xib
ility
Efficiency
DCTBe
tter FE
FinalGoal
CVT
AT
ReduceFriction
WiderWiderRRatio atio CCoverageoverage
New CVT
There are multi-paths for ‘Final Goal’, we accelerate to improve
CVTs.
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