Automobile Engineering | State the functions of clutch. Explain with neat sketch working of single plate clutch(diaphragm type) .

Function of clutch

1.To permit engagement or disengagement of gears when the vehicle is stationary (the engine is running) and when the vehicle is in motion without damaging the gear wheels.  

2. To transmit the engine power to the road wheels smoothly without shock to the transmission system while setting the vehicle in motion.  

3. To allow the engine to take up load gradually without shock or jerk

Working :

• The constructional details of diaphragm clutch as shown in figure. Coil spring is replaced by diaphragm plate. The figure shows the clutch in engaged position.               
• The conical diaphragm has been flattened in order to exert thrust on the pressure plate & friction  facing. When the clutch pedal is depressed, the release bearing exerts pressure at the center of the diaphragm spring. 
• The outer edge of the diaphragm spring moves away from the flywheel, disengaging the pressure plate from clutch plate. Hence disengaged the power from engine to the transmission system.   
• The pedal effort required to disengage the clutch is very little compared to the conventional clutch.