i am libin.I want to present a seminar presentation in my college.need all details about turbocharger. mainly concentrates on design of turbocharger

Components:
The turbocharger has four main components. The turbine (almost always a radial turbine) and impeller/compressor wheels are each contained within their own folded conical housing. They are on the opposite sides of a center housing/hub rotating assembly (CHRA). The housings fitted around the compressor impeller and turbine collect and direct the gas flow through the wheels as they spin. Twin-scroll designs have two valve-operated exhaust gas inlets, a smaller sharper angled one for quick response and a larger less angled one for peak performance.
the amount of air or exhaust that can be flowed through the system is dictated. Details like the curvature and number of blades on the wheels, Measurements and shapes etc can vary.
The center hub rotating assembly (CHRA) houses the shaft which connects the compressor impeller and turbine. This component has a bearing system to suspend the shaft, allowing it to rotate at very high speed with minimal friction. In the case of automotive uses, CHRA typically uses a thrust bearing or ball bearing lubricated by pressurised engine oil.

for more details and design, see:
http://en.wikipediawiki/Turbochargers#De...stallation
http://experiencefestivala/turbocharger%20-%20design%20details/id/5547445

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Introduction

-History

-1970’s –first oil crisis and increasingly stringent air emission regulations lead to demands for higher power density as well as higher air delivery. Outcome -> virtually all current truck engines are turbocharged.

-1978 Mercedes-Benz puts the 300 SD into production marking the appearance of the first turbocharged Diesel passenger car.

-1994 VW introduces the variable geometry turbo in their TDI Diesel engine significantly improving the transient response of the Diesel engine. Av

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turbocharger design


ABSTRACT

In these days of technological advancements in Automobile sector where mans penchant is to develop technologies that can improve the power and mileage of the vehicle TURBOCHARGER is one such exotic gadget.
Any engine needs air for combustion of fuel and it is the Air-Fuel ratio the decides the performance of an engine. Hence supply of air is an important task. During high speed operation of any engine there is not enough time for air to be sucked in the cylinder by itself (by the creation of vacuum during suction stroke).Hence the volumetric efficiency goes on decreasing as engine picks up speed as a result of which only partial combustion takes place. To fulfill the deficiency of air supercharging and consequently turbocharging came into picture.
A TURBO CHARGER is basically an exhaust gas driven air compressor which compresses the ambient air and sent this pre compressed (optionally Intercooled) air into the cylinder during suction stroke. It consists of two basic parts, the exhaust gas driven turbine and its housing, and the air compressor and its housing. The exhaust air from the engine spins the turbine and leaves while the compressor wheel, connected to the common shaft of turbine and compressor, compresses the ambient air and feeds it to the engine.



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