JATCO DECEMBER 2011.pdf

All rights reserved “JATCO Ltd”; We reserve all distribution rights such as copying and sharing with third parties． 1

Competitiveness of CVTs in terms of Fuel Economy and Drivability

Hirofumi MICHIOKAProject Promotion OfficeJATCO Ltd.

8th/ December/ 2011International Automotive congress


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


0

5

10

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25

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45

50

'05 '06 '07 '08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Source: IHS Automotive Q2 2011 & Jatco’s analysis

Volu

me [

mill

ion v

ehic

les]

DCTAMT

CVT

8AT

7AT

6AT

5AT

4AT3AT

9AT

Global demand forecast( front-drive 2-pedal transmission vehicles)

HEV（Full＋Mild）


0

2

4

6

8

10

12

'07 '08 '09 '10 '11 '12 '13 '14 '15 '16 '17

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'07 '08 '09 '10 '11 '12 '13 '14 '15 '16 '17

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2

4

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8

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12

'07 '08 '09 '10 '11 '12 '13 '14 '15 '16 '17

0

2

4

6

8

10

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'07 '08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Volu

me [

mill

ion]

・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

Volu

me [

mill

ion]

Volu

me [

mill

ion]

Volu

me [

mill

ion]

Market-specific demand forecasts(front-drive 2-pedal transmission vehicles)

6 AT

3-5 AT

DCT&AMT

CVT







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

6


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.


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

8


City

Suburb

Hig

hw

ay

RUS JPN USA EURCHN

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

+

Acce

lera

tion

Vs

Drivability focus: acceleration distribution

9


Drivability focus: driving speed distribution City

Suburb

Hig

hw

ay

RUS 2011

0%

10%

20%

30%

0 25 50 75 100 125 150

0%

10%

20%

30%

0 25 50 75 100 125 150

0%

10%

20%

30%

0 25 50 75 100 125 150

Km/h

Km/h

Km/h

Freq

Freq

Freq

0%

10%

20%

30%

0 25 50 75 100 125 150

0%

10%

20%

30%

0 25 50 75 100 125 150

0%

10%

20%

30%

0 25 50 75 100 125 150

0%

10%

20%

30%

0 25 50 75 100 125 150

0%

10%

20%

30%

0 25 50 75 100 125 150

0%

10%

20%

30%

0 25 50 75 100 125 150

0%

10%

20%

30%

0 25 50 75 100 125 150

0%

10%

20%

30%

0 25 50 75 100 125 150

0%

10%

20%

30%

0 25 50 75 100 125 150

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

Freq

Freq

Freq

Freq

Freq

Freq

Freq

Freq

Km/h

Km/h

Km/h

Freq

Freq

Freq

0%

10%

20%

30%

0 25 50 75 100 125 150

0%

10%

20%

30%

0 25 50 75 100 125 150

0%

10%

20%

30%

0 25 50 75 100 125 150

2009


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







Contents


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

0%

10%

20%

30%

0 50 100 1500%

10%

20%

30%

0 50 100 150

Highway Km/h

Fre

q

<2004> <2009>

Fuel economy performance

Km/h

Fre

q

13


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


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.

1

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


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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Market diffusion of CVTs and reasonsHow CVT-equipped vehicles are driven

and performance requirementsJATCO’s efforts to improve CVT

competitiveness①Fuel economy performance


Contents



Fle

xib

ility

Efficiency

DCTBe

tter FE

FinalGoal

CVT

AT

ReduceFriction

WiderWiderRRatio atio CCoverageoverage

New CVT

There are multi-paths for ‘ＦｉｎａｌＧｏａｌ’, we accelerate to improve

CVTs.

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Thank you for your attention!Thank you for your attention!

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Documents

JATCO DECEMBER 2011.pdf