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The Turbocharger To inletmanifold Turbine housing Oil supply Lubricates and cools thebearing of the central shaftwhich may turn at speedsapproaching 200,000 rpm. To exhaustsystem Turbine wheel Placed in exhauststream and turnedby exhaust gases. Exhaustgas inlet Oil return Central shaft Runs in oil-fedbearings androtates withturbine wheel. Compressorhousing Filteredair intake Compressor wheel Driven by turbinewheel via centralshaft, it forces extrafuel/air mixture intoinduction system.

At the heart of the turbocharger are the turbine and compressor which rotate together on the same shaft. The turbine is housed in and driven by the exhaust stream. It turns the compressor which pumps air into the engine.

Critical attention is needed to the design of the centrally mounted bearing, because the turbine, compressor and shaft can rotate at speeds of up to 200,000rpm.

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Installing a turbocharger

There are two main ways to get more power from a car's engine. The first (and until recently the...