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Executive summary

What’s new
The playing field Financial challenges
Technology is changing

Steering system basics

Regulations
Steering gear
Advent of power steering

EPS: Electronic power steering

Rapid growth
Geographic influences
Low cost EPS
Who supplies whom? Electronic power steering system
What sells EPS
What OEMs want
Kinds of EPS
New EPS entrants

Hydraulic and EHPS

Historic hydraulic power steering

Electro-Hydraulic Power Steering

Who supplies whom?
Electro Hydraulic Power Steering

Active Steering

The ECU makes decisions
BMW’s pioneering system
Audi harmonic gears
Democratisation begins
Driver assistance
Automated parking

Total Chassis Control

Suspension, tires, brakes and steering
Integrated steering and braking
Suppliers or OEMs?

Steer-by-wire

A new geography
Mixed enthusiasm

Four wheel steering

Renault brings 4WS back to the foreground
Intriguing past, uncertain future

Steering components Electronics

Mass
Who supplies what

Company overviews

Delphi Steering
JTEKT Corp.
Mando Corp.
NSK Steering Systems
Tedrive Holding B.V.
ThyssenKrupp Presta
TRW Automotive Steering
ZF-Lenksysteme

Company Profiles

Autoliv
Delphi
INA
Ixectic
Kostal
NSK
Showa
VSE
Valeo
ZF Lenksysteme

List of Tables

Table 1: Global power steering outlook
Table 2 : Power steering technologies
Table 3 : Forecasts vary for EPS share
Table 4 : Who supplies whom EPS
Table 5 : Who supplies whom EHPS
Table 6 : Delphi Sales and Profits

Table of figures

Figure 1 : Electronic power steering in the new edition of the BMW Mini.
Figure 2 : JTEKT column-based EPS to Europe 15 years ago for the Renault Twingo.
Figure 3: TRW engineers test a rack-based EPS system.
Figure 4 : Delphi’s pinion EPS, suitable for cars in the A to C segments.
Figure 5: Electric power steering.
Figure 6: TRW furnishes electro-hydraulic power steering systems.
Figure 7 : Tedrive depends on its skill at high-volume manufacture of low-cost steel tube-based hydraulic systems while it finishes development of an electronic power steering system.
Figure 8 : Delphi has developed active steering for electro-hydraulic systems.
Figure 9 : The Porsche Cayenne hybrid chassis shown at the 2007 IAA in Frankfurt.
Figure 10 : The ZF active steering system for Audi.
Figure 11 : JTEKT models the Motion Management System.
Figure 12: ITT Corp developed a joystick for a steer-by-wire prototype.
Figure 13: SKF Industrie SpA provided redundant electric motors driving the rack on two Smart Fortwos adapted to steer-by-wire in the context of a European development program called SPARC.
Figure 14 : Jtekt engineers have developed steer-by-wire system.
Figure 15 : The Aisin actuator for the Renault Laguna.
Figure 16 : Aisin rear steering unit.
Figure 17 : The aluminum V-shape rear axle on the BMW 7-series supports an electric motor with a spindle drive that turns the rear wheels up to 3°.
Figure 18 : Progressive Swiss Steering’s rack and pinion with variable ratio.
Figure 19 : ThyssenKrupp’s Presta SteerTec’s ball-style steering gear for high-end models.
Figure 20 : TRW has developed a steering wheel with a central hub.
Figure 21 : Renault’s NSK electronic power steering in the new Megane.