Automobile Suspensions by Campbell, Colin.
1 Wheels and tyres
3 Suspension principles
4 Suspension geometry
5 Conventional systems
6 Road -holding
8 Pneumatic suspensions
9 Hydropneumatic suspensions
10 Interconnected and no-roll suspensions
11 A small FWD saloon car: Ford Fiesta S
12 A high-performance sports car: Porsche 928
This book is an introduction to the elementary technology of automobile suspensions. Inevitably steering geometry must be included in the text, since the dynamic steering behaviour, road-holding and cornering behaviour are all influenced by the suspension design. Steering mechanisms and steering components are not covered in this book.
This is not a mathematical treatise, but only a fool or a genius would attempt to design a motor vehicle without mathematics. The mathematics used in this book should present no problem to a first-year university student. SI units have been used in general, but for the benefit of those not familiar with them we have included in brackets, in many cases, the equivalent values in Imperial units. Many engineers regard the Pascal as an impractical unit of pressure. The author has therefore expressed pressures in bars (1 bar = 105Pa). A deviation from SI units is the use of degrees and minutes, instead of radians, to express camber, castor, roll angles, etc. This is still common practice in the motor industry.
No attempt has been made to make any stress calculations on suspension components. The automobile engineering student will have access to other textbooks on such subjects as strength of materials and theory of structures. The author is grateful for technical information, photographs and drawings supplied by many car and component manufacturers.
The following companies have been particularly helpful: Automotive Products Ltd, Citroen Cars Ltd, Datsun (UK) Ltd, Dunlop Ltd, Lotus Cars Ltd, Lucas-Girling Ltd, Magnesium Elektron Ltd (MELMAG wheels), Mercedes-Benz (UK) Ltd, Moulton Developments Ltd (Hydragas suspension), Porsche Cars (GB) Ltd, Tech Del Ltd (Minilite wheels). Special thanks are due to the editor of Motor for his permission to publish data from ‘The 150 m.p.h. Corner’, a report (3 March 1979) in that excellent journal, givmg measurements made with the assistance of the Cranfield Institute on the Lotus 79 when cornering at 2.05g radial acceleration.
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