Abstract
Part 1 of this paper states the basic requirements of clutches and then discusses the various factors which must be considered in the initial stages of clutch design and specification for particular applications. The differing types of clutches used over a wide range of operating conditions are described and changes likely to be seen in future designs are mentioned. A small section is devoted to facing friction materials which are one of the most important components of the clutch. Finally the steps taken to ensure satisfactory performance in a specific vehicle model are explained.
Part 2 first considers the basic requirement and characteristics and then the ergonomic factors involved. There are three common methods of control, two being mechanical, namely lever and rod system and cable system, and the third hydraulic, all of which are discussed in some detail. With each of these methods some form of power assistance may be necessary to ensure a satisfactory pedal load and the various methods by which this can be achieved are considered.
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