The G-Lader is a scroll-type supercharger used in various Volkswagen Passenger Cars models. Its purpose is to increase the motive power output from the internal combustion engine attainable with a given engine displacement. Since it is not enough to simply inject more fuel, as this produces too rich an air-fuel mixture, more intake air has to be added at the same time. This can be achieved with an exhaust-driven turbocharger, or a crankshaft-driven positive displacement compressor. The G-Lader is in the compressor category, since it is crankshaft-driven and does not have the "lag" usually associated with turbocharged engines.
A G-Lader supercharger from a Volkswagen Corrado G60
A compressor is a mechanical device that increases the pressure of a gas by reducing its volume. An air compressor is a specific type of gas compressor.
A small stationary high pressure breathing air compressor for filling scuba cylinders
High pressure reciprocating compressor from Belliss and Morcom, used in the bottling industry
A motor-driven six-cylinder reciprocating compressor that can operate with two, four or six cylinders.
A three-stage diaphragm compressor