The figure reveals the vacuum clutch mechanism. This sort of clutch takes advantage of the present vacuum during the motor manifold to work the clutch. The vacuum clutch is made up of a reservoir, non-return valve, vacuum cylinder with piston, and solenoid valve.  The flywheel functions being an Power storage https://clutchplate54196.ageeksblog.com/31998873/5-essential-elements-for-clutch-kereta