SUPERCHARGER

in piston-type internal-combustion engines, air compressor or blower used to increase the amount of air drawn into the cylinders by the pumping action of the pistons during each intake stroke. With the additional air, more fuel is burned, and the power of the engine is thus increased. In aircraft piston engines, supercharging compensates for the reduced atmospheric pressure at high altitudes. Development of the gas turbine, which requires constant flow of air and fuel, brought the introduction of the turbosupercharger, a centrifugal blower driven by a small gas turbine powered by the exhaust gases from the engine cylinders.