turbo charger presentation

8/12/2019 Turbo Charger Presentation

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Turbo charger


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In 1925 Alfred Buchi, a Swiss engineer, Patented a design for the turbocharging with power increase of 40%.

First turbo charger were limited to larger engines, such as Marine engines

later with trucks engine.

Chevrolet corvair and Oldsmobile made the debut.

After oil crisis in 1973, it became more acceptable.

It was introduced in petrol engine even before in diesel but due to not

being economical, it discontinued.

First diesel turbocharged engine came in Mercedes-benz 300 SD.


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A turbine driven forced induction device thatmakes an engine more efficient and

produces more power forits size by forcing extra air

Into the combustion

chamber.


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The objective of a turbocharger is toimprove an engine's volumetric

efficiency by increasing density of

the intake gas (usually air) .

The turbocharger increases the

density of air entering the engineto create more power.


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Principle of using Turbocharger

Exhaust gases when leaving the engine through the exhaust collector are led to

the turbine pit where the rotor is located. The shaft drives the compressor rotor which is located on the other side of the

device (often called the cold side), which compresses air that supplies the

engine.


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Methods of Turbo charging

There are various ways of turbo charging an

engine:

Constant pressure turbo charging

Pulse turbo charging

Two stage turbo charger


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Constant pressure turbine


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Constant pressure turbo charging

Exhaust from cylinders discharge into acommon manifold at a pressure greater thanATM.

Exhaust gases expands in exhaust valve toan approx constant pressure in commonmanifold and pass it further to the turbine.

Blow down energy is converted into Kineticenergy.

Exhaust gases are maintained at constant


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photo


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Considerable part of the blow-down energy isconverted to exhaust pulses as valve opens.

Pulses are led through narrow pipes by the shortest

route to turbine where this energy is utilized.

Towards the end, the pressure in the exhaust pipe

drops below the scavenging and large air pressuremaking the scavenging quite easy.


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Pulse converter

photo


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Two stage converter

Also called as twin turbo as in Bentley,

includes two turbocharger of different sizes

and series e.g.

high pressure stage operating on the pulse system

and a low pressure stage on constant pressure

operation.


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Limitations of the turbocharger

Requires extra Special Exhaust Manifold

Fuel injection has to be modified to inject

more fuel per unit time. Either larger pumpingelement or larger nozzle is required.


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Unlike natural aspirated, turbocharged engines pass

only the most minute particle without damage.

The efficiency of the turbine blade is very sensitive

to gas velocity so that is very difficult to obtain goodefficiency over a wide range of operation.


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Turbo charger and super charger


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Latest in Turbocharger


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Components of the Turbocharger


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Turbines

The turbine is driven by exhaust gasses thatcan exceed 1875F (1025C) and which arevery corrosive.


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turbo charger presentation

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