Engine technology (38).pdf

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VISIT WWW.VEHICLEDYNAMICSINTERNATIONAL.COM FOR EXCLUSIVE NEWS AND FEATURES

VEHICLE

INTERNATIONAL

www.VehicleDynamicsInternational.com

ANNUAL

SHOWCASE

Lexus GS

2012

EXCLUSIVE: The chassis engineering behind

the first Lexus designed for driver appeal

Tire

testing

All the latest

facilities and

techniques

Active

suspension

John Miles

test drives

ACOCAR

Mazda

CX-5

SkyActiv chassis

technology

revealed

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Leading-edge test systems

Kinematics and Compliance test machines

In-vehicle steering, braking, and accelerator robots

Driverless test systems

Steering systems test machines

Soft crash target vehicles

Powertrain NVH measurement & analysis systems

www.abd.uk.com

Anthony Best Dynamics Ltd., Holt Road, Bradford on Avon

Wiltshire BA15 1AJ. England. Telephone: +44 (0) 1225 860200

E-mail: info@abd.uk.com

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in this issue

01

42

04

04

36

52

COVER STORY

Lexus GS

42 Duncan McMath describes the engineering decisions behind the platform and

chassis for the 2012MY Lexus GS. Is this the most dynamic Lexus sedan to date?

Product &

service profiles

What’s new?

4 ON THE COVER Mazda CX-5

The new compact SUV contains the first application

of Mazda’s weight-saving SkyActiv-Chassis, which

will underpin a whole new generation of models

8 BMW i3

Is a rear-engined, rear-drive EV made of carbon

fiber and aluminum the future of urban mobility...

12 Volkswagen Up

56 Innovative simulator

58 Automotive test systems

60 HIL for driver training

62 Touring car dynamics

64 Integrated simulation

66 Low-cost adaptive damping

68 Advanced power steering

70 Electronic torque vectoring

71 Steering testing

72 New simulation release

73 Innovative testing

74 Cone placement software

75 Human-in-the-loop

76 Accurate brake testing

77

Features

36 Foundation brakes

Graham Heeps speaks to some of the leading brake

suppliers to discover what the future holds for

discs, pads, calipers, and hydraulic systems

48 ON THE COVER ACOCAR active suspension

John Miles and Keith Read get to grips with

Tenneco’s innovative active system. Can it succeed

where others have previously failed?

52 Site visit: Fowlerville

...or is it a cleverly packaged, but otherwise pretty

conventional, front-transverse-engined city car?

Supplier interview

15 Frank Litjens, TASS

Aisin’s small but well-thought-out proving ground

in Michigan is the subject of this issue’s site visit.

Adam Gavine discovers what it has to offer

How chassis engineers’ lives will be changed forever

by the emerging ADAS technologies. By Matt Joy

Columns

18 On the job: John Miles

Will all supercars ultimately be four-wheel drive?

20 Made in Italy: Matt Davis

The back-to-basics appeal of the Morgan 3 Wheeler

78 Home truths: John Heider

Technical papers

24 ON THE COVER Tire testing

Phil Morse looks into the existing modeling and

physical testing options, and collects some expert

opinions on what the future may hold

32 HIL simulation

Emergency city braking

Blame Henry Ford for the proliferation of big wheels

Engineers from GM Europe and IPG explain how HIL

simulation of closed-loop driving maneuvers is used

to determine how a new vehicle will handle

80 Last stand

Cars that don’t behave as they should. Or do they?

Case 24: Mercedes-Benz CLS 250 CDI

.com• Annual Showcase 2012

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role call

02

A NOTE FROM THE EDITOR

Vehicle Dynamics International

Abinger House, Church Street,

Dorking, Surrey, RH4 1DF, UK

editorial tel: +44 1306 743744

editorial fax: +44 1306 875824

sales tel: +44 1306 741200

sales fax: +44 1306 743755

email: vehicledynamics@ukipme.com

It stands to reason that a group of vehicles

engineered by broadly the same group of people,

operating under the same leadership, will feel and

drive in a broadly similar way. I believe the 21 st -century

marketing-speak for this is now ‘Brand DNA’...

Changing this inherent ‘character’ or ‘personality’ is a

tricky – and risky – business. Two of the most obvious

examples of this in recent decades were Audi’s gradual

reinvention of itself as a ‘premium brand’ (both are VW

Polos, but there’s an ocean of difference between an Audi

50 and an A1), and Ford’s Parry-Jones-inspired rebirth as a

maker of driver’s cars, starting with the original Ka.

Now Toyota and Lexus have decided that it’s time to

inject some on-road sparkle into their line-ups. For Toyota,

the GT 86 coupe heralds a return to more dynamic vehicles

reminiscent of the MR2 and Corolla AE86 of old.

For Lexus, this is uncharted water. But at least there

has been recognition from within that build quality and

refinement alone will never be enough to rival the German

‘Big Three’ – at least not on their home turf.

One of the many interesting articles in this issue is an

insight into how Lexus has systematically redesigned the

GS (and its new ‘N’ platform) to try to match the driver

appeal of Mercedes-Benz and BMW ( p42 ). Regardless of

whether or not they succeed, full marks for giving it a go!

Annual subscription £60/US$108

published by

UKIP Media & Events Ltd

EDITORIAL

Editor Graham Heeps

Proofreaders

Aubrey Jacobs-Tyson, Frank Millard

Chief sub editor Alex Bradley

Deputy chief sub editor Nick Shepherd

Sub editors Sarah Lee, Nicola Wells,

Lynn Wright

Contributors this issue

Matt Davis, Adam Gavine,

John Heider, Henning Holzmann,

Matt Joy, Duncan McMath,

John Miles, Phil Morse,

Keith Read, Uwe Wurster

ADVERTISING

Publication director

Mike Robinson

Publication managers

Daniel Sumares, Aboobaker Tayub

DESIGN & PRODUCTION

Head of production & logistics

Ian Donovan

Production team

Carole Doran, Lewis Hopkins,

Cassie Inns, Robyn Skalsky

Art director Craig Marshall

Design team Louise Adams,

Andy Bass, Anna Davie,

Duncan Norton, James Sutcliffe,

Nicola Turner, Julie Welby, Ben White

Vehicle Dynamics International

is brought to you by UKIP Media

& Events Ltd, publisher of

Engine Technology International,

Automotive Testing Technology

International, Electric & Hybrid

Vehicle Technology International,

Tire Technology International,

Professional Motorsport World,

and Professional Motorsport

Circuit, and organizer of

Automotive Testing Expo Europe,

Automotive Testing Expo North

America, Automotive Testing

Expo China, Automotive Testing

Expo India, Global Automotive

Components and Suppliers Expo,

Professional MotorSport World

Expo, and Vehicle Dynamics Expo.

Go to www.ukipme.com to

discover more.

Graham Heeps

CIRCULATION

contact Adam Frost

adam.frost@ukipme.com

CONTRIbuTORs

CEO

Tony Robinson

Managing director

Graham Johnson

Editorial director

Anthony James

The views expressed in the articles and

technical papers are those of the authors and are

not necessarily endorsed by the publisher. While

every care has been taken during production, the

publisher does not accept any liability

for errors that may have occurred.

Matt Davis

Matt has recently

driven such high-tech

newcomers as the

Mercedes C63 coupe

Black Series and

Porsche’s ‘991’ 911.

So which of his recent

drives are we most

interested in hearing

about? The Morgan

3 Wheeler, of course!

(p20)

aDaM Gavine

In Michigan to report on

Automotive Testing Expo

North America, Adam

also took a trip to the

Fowlerville proving

ground to check out

its impressive vehicle

development facilities.

His site visit starts on

page 52

HenninG HolzMann

Henning kindly took a

break from his day job

as GM’s global CAE lead

for vehicle dynamics to

co-author an article for

VDI. Working together

with Uwe Wurster of

IPG Automotive, he

describes GM’s HIL

simulation of closed-

loop driving maneuvers

(p32)

Matt Joy

For this issue, Matt

interviewed TASS’s

Frank Litjens to hear his

views on the emerging

challenge of ADAS

systems integration and

future developments

in the field of tire

modeling. Turn to page

15 for more

PHil Morse

Phil follows up his

exploration of shaker

rig testing with a look

at tire testing and

modeling techniques

(p24). Some 80 years

after the first attempts

at tire data acquisition,

there’s still work to

be done before tire

behavior can be truly

understood...

This publication is protected by copyright ©2012.

ISSN 1479-7747 Vehicle Dynamics International

Printed by William Gibbons, Willenhall,

West Midlands, WV13 3XT, UK

Average net circulation per issue for the period

January 1, 2010 to December 31, 2010: 7,966

.com• annual showcase 2012

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