Prius 4 Presentation Shunsuke Fushiki

Shunsuke FushikiHybrid Vehicle Engineering Management Div.

1

First generation Prius

Second generation Prius

Current Prius

2

Low fuel consumption

Hybrid system The new hybrid effect

Emotionaldriving

experience

4

High efficiency Compact andlightweight system

Excellent environmentalperformance

5

Fuel Efficiency Gains Achieved with the New Hybrid System

(km/ )ℓ

Fuel

con

sum

ptio

n m

easu

red

usin

g th

e Ja

pane

se J

C08

cyc

le

Current Prius

New Prius

5.0%

Engine

2.6%

Transaxle

3.2%

Motor

2.4%

PCU

5.0%

Hybrid batteryHybrid system management

Vehicle

40km/ℓTarget

6

Max

imum

ther

mal

effi

cien

cy

Firstgeneration

Prius1NZ-FXE

Secondgeneration

Prius1NZ-FXE

38.5%

Current Prius2ZR-FXE

New Prius2ZR-FXE40%

(%)

(Year)1995 2000 2005 20152010

45

40

35

30

: Toyota gasoline engines : Competitors’ gasoline engines

Improvements to maximum thermal efficiency of engines over time

7

Reduced friction

Toyota-first dual cooling system

Improved combustion and knock control

Maximum Thermal Efficiency of 2ZR-FXE Engine: 40%

8

Power split device

Motor

Parallel motor reduction gear format

Generator

Mechanical loss reduced by approx. 20%

Length reduced by 47 mm

New Multi-Axis Transaxle

9

Loss reduced by over 20%

Weight reduced by over 20%

Compact and Lightweight High-Output Motor

Development of rolling-coil structure

10

Loss reduced by approx. 20%

Size reduced by 33%

Auxiliary battery moved to engine compartment

Engine

Auxiliary battery

Upper cover

Inverter case

Smoothing capacitor

Converter case

Lower cover

Control circuit

Current sensor

Power stack(cooler and power cards)

Reactor

DC/DCconverter

PCU

Newly Developed PCU

11

Newly Developed Nickel-Metal Hydride Battery

12

0

0.20

0.40

0.60

0.80

1.00

1.20

1.40

30

32

34

36

38

40

Batte

ry v

olum

e

( )ℓ

Size reduced by 10%

10%

35.539.4 1.281.00

28%

Current Prius New Prius Current Prius New PriusNote: assuming a battery temperature of 25℃

Newly Developed Nickel-Metal Hydride Battery

Charging performance improved by 28%

Amou

nt c

harg

ed p

er u

nit o

f tim

e

13

Improved output

Newly Developed Lithium-Ion Battery

14

+110mm

-55mm

Luggage area502　ℓ(+56 )ℓ

Battery

Current Prius New Prius

Luggage area capacityℓ56 increased by

NiMH & Li-ion

Relocated Battery

15

Vehicle speed(km/h)

Time

(rpm)

Engine speed

Higher frequency of engine stops

Higher Engine Stop Speed

16

Engine

Transaxle

Hybrid battery

PCU

Motor

4%

28%

13% 16% 13%

26%

Hybrid system management

Per-unit Contribution to Improvement in Fuel Efficiency

17

Rear transaxleRear motor

Rear inverter

Hybrid battery(also on 2WD models)

New E-Four System

18

TimeRear-wheel

torque

Setting off and

accelerating

Standard driving

patterns

Slippery surfaces

(snow, etc.)Deceleration

New E-Four Driving Mode

19

More Enjoyable Driving Experience with the New Hybrid System

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Key elements of an enjoyable driving

experience

Peace of mind

Smooth driving experience

Light, responsivedrive

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Highway on-ramp

Driving in residential areas


Peace of mind

Light, responsive drive

22

Peace of mind


Light, responsivedrivePeace of mind Light, responsivedrive


experience

23

Acce

lera

tion

Accelerator pedal stroke

Power mode

Normal mode

New eco-mode (equivalent to current model’s normal mode)

Region emphasizing enjoyableacceleration performance

Smooth Acceleration

24

Peace of mind






experience

25

Current Prius

Pitch Excessive

New Prius

Acceleration (G)

Vehicle pitches unstably.

PitchMinimized

Minimizing Pitch when Accelerating from Start

Acceleration (G)

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experience

Peace of mind


Light, responsivedrivePeace of mind


27

6 80 2

Engi

ne s

peed

4 10 12 14

Time

New PriusCurrent Prius

Responsive and Linear Acceleration

28

Sports driving conditionsNormal driving conditions

Ahead

Behind

Left Right

New Driving System

29

Engine speed needsAc

cele

ratio

n Vehicle speed

Improves acceleration in line with the driver’s needs

Engine braking needs

Controls engine braking in line with the driver’s needs

Dec

eler

atio

n

Vehicle speed

Sharp

Improved responsiveness

New Driving System

(m/s )2 (m/s )2

30

Targeted fuel efficiency of 40 km/ℓ

Fun to drive

Compact and lightweight system

New Hybrid System

31

Beautiful Hybrid

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Prius 4 Presentation Shunsuke Fushiki

Automotive

Transcript of Prius 4 Presentation Shunsuke Fushiki