The figure reveals the vacuum clutch mechanism. This type of clutch works by using the existing vacuum within the engine manifold to operate the clutch. The vacuum clutch is made of a reservoir, non-return valve, vacuum cylinder with piston, and solenoid valve.  The flywheel capabilities being an energy storage ingredient, https://zionckoqt.vidublog.com/32106793/5-essential-elements-for-clutch-kereta