
13 Friction clutches
13.1 TYPES OF SINGLE-PLATE CLUTCH
General requirements
A clutch is a device used in engineering to engage
smoothly two shafts in relative motion, one of which
may be stationary, and to release them quickly or
slowly at will. The purpose of fitting a clutch between
the engine and gearbox of a motor vehicle is to satisfy
the following requirements:
1 To connect a running engine smoothly and gradually
to the remainder of the transmission system.
2 To permit gear changing when a vehicle is in motion.
3 To allow the engine to continue running when a
vehicle is temporarily halted in gear with the clutch
pedal depressed to disengage ...