25-02-2013, 12:07 PM
Fabrication of turbo charger in two wheeler
Fabrication of turbo.ppt (Size: 653 KB / Downloads: 863)
INTRODUCTION
A turbocharger, or turbo (colloquialism), from the Greek "τύρβη" (mixing/spinning) is a forced induction device used to allow more power to be produced for an engine of a given size.
The key difference between a turbocharger and a conventional supercharger is that the latter is mechanically driven from the engine often from a belt connected to the crankshaft, whereas a turbocharger is driven by the engine's exhaust gas turbine.
A turbocharged engine can be more powerful and efficient than a naturally aspirated engine because the turbine forces more intake air, proportionately more fuel, into the combustion chamber than if atmospheric pressure alone is used.
Turbos are commonly used on truck, car, train and construction equipment engines. Turbos are popularly used with Otto cycle and Diesel cycle internal combustion engines.
WORKING PRINCIPLE
A turbocharger is a small radial fan pump driven by the energy of the exhaust gases of an engine.
A turbocharger consists of a turbine and a compressor on a shared shaft. The turbine converts heat to rotational force, which is in turn used to drive the compressor.
The compressor draws in ambient air and pumps it in to the intake manifold at increased pressure, resulting in a greater mass of air entering the cylinders on each intake stroke.
ADVANTAGES
More specific power over a naturally aspirated engine it means an engine can produce more power for its size.
Reuse of excess exhaust heat means the engine runs more efficiently than supercharged engines.
Easy to fitting and removing
DISADVANTAGES
A large turbo may give more peak power, but can take more time to spool up.
Turbochargers are costly