What is Supercharger ?

A Supercharger is an air compressor that increases the pressure or density of air supply to an internal combustion engine.

This gives each intake cycle of the engine more oxygen, letting it burn more fuel and do more work, thus increasing the power output.

The Power for the supercharger can be providing mechanically by means of a belt, shaft, or chain. And this 3 Parts are connected to the engine’s crankshaft.

Four Different Types of Supercharger

1 ) Roots Type

The Roots-type blower is a positive displacement lobe pump which operates by pumping a fluid with a pair of meshing lobes resembling a set of stretched gears.

The roots traps air in a chamber between the rotor and the housing. In the void between the rotor’s lobes. And transports this trapped air to the outlet side, at the engine’s intake manifold. By virtue of moving air into the manifold at a rate higher than the engine consumes it, pressure is built.

2) Centrifugal Supercharger

A centrifugal is a specialized type of supercharger that makes use of centrifugal force. In order to increase the manifold air pressure MAP.


An increased MAP allows the engine to burn more fuel. Which results in an increased power output. Centrifugal superchargers are generally attach to the front of the engine via a belt-drive or gear-drive from the engine’s crankshaft.

3) Twin Screw Supercharger

In a twinscrew style, The two rotors are designing to mesh with one another and compress the air force between them.


So while they’re both similar in design. Twin-screw superchargers compress the air directly while roots superchargers create pressure in the manifold that compresses the air.

4) Electric Supercharger

An electric supercharger is a specific type of supercharger for internal combustion engines. That uses an electrically power forced-air system that contains an electric motor to pressurize the intake air.

By pressurizing the air available to the engine intake system. The air becomes more dense, and is match with more fuel, producing the increased horsepower to the wheels.

How Electric Supercharging Eliminates Turbo Lag

As small-displacement turbocharged engines become increasingly commonplace, automakers are working hard to eliminate turbo lag.

In Some Case compound turbocharging multi-turbo setups that pair small, fast-responding turbos with larger, high-pressure units. For some automakers, even that isn’t enough. This is where electric superchargers come in.

An electric supercharger performs the same function. As an exhaust-driven turbo or an engine-driven supercharger.

Cramming high-pressure air into the engine’s intake to maximize power output. But unlike a conventional turbo or supercharger. An electric blower responds instantaneously, eliminating the delay required to build up RPMs or exhaust flow.

YouTube’s Jason Fenske of Engineering Explained has an excellent breakdown of how these systems work.

Volvo and Mercedes both use electric supercharging in various applications; here, Fenske uses Audi’s electric-blower-plus-twin-turbo setup as his example.

Video Credit –YouTube’s Jason Fenske of Engineering Explained

Frequently Asked Questions

What does a Supercharger do ?

A supercharger also pumps additional air into the engine, but it is instead driven mechanically by the engine via a belt that runs off the crankshaft or by an electric motor. In a typical turbocharger like this one, the compressor in the silvery intake housing pulls in and compresses air which then feeds the engine.

What is the difference between Supercharger & Turbocharger ?

A supercharger is driven from the engine’s crankshaft by a belt, shaft or chain whereas turbochargers obtain their power from a turbine which harvests energy from the engine’s exhaust gases. In simple terms a turbo is an air pump that enables more air to be pumped into the engine at higher pressure.

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