The compressor of turbocharger is driven

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  1. by mechanical power of engine
  2. Manually
  3. by gas turbine mounted in the exhaust flow of engine
  4. by separate electrical motor driven by battery

Answer (Detailed Solution Below)

Option 3 : by gas turbine mounted in the exhaust flow of engine
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Explanation:

Turbocharger Compressor Drive

  • A turbocharger is a device used to increase the power output and efficiency of an internal combustion engine by forcing more air into the combustion chamber. It consists of two main components: a turbine and a compressor. The turbine is driven by the exhaust gases from the engine, and the compressor is coupled to the turbine to compress the incoming air and deliver it to the engine at higher pressure.
  • In a turbocharger, exhaust gases from the engine pass through the turbine, causing it to spin. This rotational energy is transferred to the compressor via a shaft. The compressor then draws in ambient air, compresses it, and delivers it to the engine's intake manifold at increased pressure. This process allows more air (and therefore more oxygen) to enter the engine, enabling the combustion of more fuel and resulting in increased power output.

Advantages of Turbochargers:

  • Increased engine power output by allowing more air and fuel to combust.
  • Improved fuel efficiency due to better utilization of exhaust energy.
  • Reduction in engine size for the same power output, leading to lighter and more compact designs.
  • Lower emissions as a result of more efficient combustion.

Disadvantages of Turbochargers:

  • Turbo lag, which is the delay in power delivery as the turbine spools up.
  • Increased complexity and cost of the engine system.
  • Higher maintenance requirements due to additional components.
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