the supercharger prior to the clutch operating in the first condition application_number US 50266606 A description referring now to the drawings which are not intended to limit the invention fig1 illustrates a vehicle internal combustion engine including a u201c superturbo u201d boosting system as that term has been generally defined and as will be described in greater detail subsequently included is a conventional vehicle engine generally designated e and represented herein for simplicity by a single cylinder piston combination charge air to be fed into the combustion chamber of the engine e enters through an intake 11 see arrow then flows through an air filter 13 and then flows to a supercharger generally designated 15 through an air duct 17 which communicates the incoming air into an inlet 19 of the supercharger the supercharger 15 also has typically a set of rotors 21 which transport volumes of the incoming air from the inlet 19 of the supercharger 15 to an outlet 23 whenever the supercharger is receiving mechanical drive to its input represented somewhat schematically as an input shaft 25 the mechanical input to the supercharger is provided only when a clutch represented schematically by a belt 27 driving a pulley typically a u201c micro v belt u201d is engaged i e the condition shown in fig1 it should be understood.