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A centrifugal supercharger 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.
Positive displacement superchargers deliver an almost constant level of boost pressure increase at all engine speeds, while dynamic superchargers cause the boost pressure to rise exponentially with engine speed (above a certain threshold). [4] Another family of supercharger, albeit rarely used, is the pressure wave supercharger.
Wright R-3350 Duplex-Cyclone Turbo-Compound radial engine.. The first aircraft engine to be tested with a power-recovery turbine was the Rolls-Royce Crecy.This was used primarily to drive a geared centrifugal supercharger, although it was also coupled to the crankshaft and gave an extra 15 to 35 percent fuel economy.
An animation of the operation of a scroll-type supercharger. Air is confined between the two spirals and is compressed as it is forced towards the centre. In automotive application, the spirals would have far fewer turns. The scroll-type supercharger is a scroll compressor used as a positive displacement orbiting-spiral supercharger. It is a ...
Eventually there were around 350 companies that provided support to the project, including Rolls-Royce, which designed, manufactured and tested the two-stage centrifugal supercharger. The firm also developed the flame traps for the inlet manifold , used to prevent the highly compressed fuel/air mixture from exploding in a backfire .
In 2000, ProCharger managed an industry first by offering the first gear driven centrifugal supercharger with self-contained oiling. [18] It is credited with being the first to offer a supercharger system for Corvettes with LS engines, and in 2010 was the first to introduce supercharger systems for the Ford Raptor and 3.7L V6 Mustang. [19]
Superchargers - Superchargers are used for engine-power enhancement as well, but only work off the principle of compression. They use the mechanical power from the engine to spin a screw or vane, some way to suck in and compress the air into the engine.
Pratt & Whitney developed the R-985 Wasp Junior as a smaller version of the R-1340 Wasp to compete in the market for medium-sized aircraft engines. Like its larger brother, the Wasp Junior was an air-cooled, nine-cylinder radial, with its power boosted by a gear-driven single-speed centrifugal type supercharger.