Supercharger

SUPERCHARGERGroup 2.

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WHAT IS SUPERCHARGER?

A supercharger is an air compressor used for forced induction of an internal combustion engine.

The greater mass flow-rate provides more oxygen to support combustion than would be available in a naturally aspirated engine, which allows more fuel to be burned and more work to be done per cycle, increasing the power output of the engine.

Roots Types

Centrifugal Type

Screw Type

CONSTRUCTION OF SUPERCHARGER

OPERATION OF SUPERCHARGER

Roots Type The Roots type

supercharger or Roots blower is a positive displacement lobe pump which operates by pumping fluids with a pair of meshing lobes not unlike a set of stretched gears. Fluid is trapped in pockets surrounding the lobes and carried from the intake side to the exhaust

Centrifugal Type The centrifugal-type

supercharger is an engine-driven compressor used to increase the power output of an internal-combustion engine by increasing the amount of available oxygen by compressing air that is entering the engine. This type of supercharger is practically identical in operation to a turbocharger, with the exception that instead of exhaust gases driving the compressor via a turbine, the compressor is driven from the crankshaft by a belt, gear or chain drive.

Screw Type Lysholm is also called screw

type supercharger. The supercharger consists of

2 screws, one with male threads and another with female threads. They closely mesh together. When they rotate, air is captured between the screws and the housing while being pushed from the inlet towards the outlet. Moreover, the space gets smaller and smaller as it moves forward, so Lysholm performs internal compression and enables higher boost pressure than Roots type supercharger.

SUPERCHARGER COMPONENT

ROOTS TYPE

Meshing Lobes Pulley Timing Gears Gasket Pressure Relief Valve Bearing case Blower Housing Manifold Intercooler Drive Belt Input Shaft Bypass Bearing Plate Bearings Isolator/Coupling Rotor Housing

CENTRIFUGAL TYPE

Rear Housing Spindle Compressor Wheel Compressor Housing Pulley Front Housing Input Ring Roller

TWIN SCREW TYPE

Oil Dipstick Bore Billet Extruded Case Shafts Bearings Pulley Lobe Billet Inlet plate Oil Cooling Pods Silent Gears Billet Drive Manifold

ADVANTAGES AND DISADVANTAGES OF SUPERCHARGED

ADVANTAGES OF SUPERCHARGER

Advantages of a Supercharger 1). Increased power 2). No lag – Consistent power delivery 3).Generally better throttle response 4). No Special Procedures or extra

maintenance 5). Centrifugal Superchargers are more

efficient at higher RPM 6). Roots & Twin Screw Superchargers are

efficient at low RPM 7). Easier to tune 8). Easier to install than turbochargers

DISADVANTAGES OF SUPERCHARGER

1). Consumes a lot of power from the engine (therefore not very efficient)

2). Increases the strain on the engine 3). Increases the strain on the running gear 4). Expensive 5).Noise

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