Question: What is meant by CI engine?

In a compression ignition engine only air or air plus residual combustion gases from the exhaust known as exhaust gas recirculation (EGR) is inducted into the chamber during the intake stroke, and compressed during the compression stroke.

What is the meaning of CI engine?

The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to the mechanical compression; thus, the diesel engine is a so-called compression-ignition engine (CI engine).

What is CI engine for?

Compression ignition (CI) engines

In a compression ignition engine only air or air plus residual combustion gases from the exhaust known as exhaust gas recirculation (EGR) is inducted into the chamber during the intake stroke, and compressed during the compression stroke.

How does CI engine works?

Diesel vehicles are similar to gasoline vehicles because they both use internal combustion engines. … In a compression-ignited system, the diesel fuel is injected into the combustion chamber of the engine and ignited by the high temperatures achieved when the gas is compressed by the engine piston.

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Which is better Si or CI?

The high temperatures achieved in CI engines cause the fuel to ignite. SI engines are high speed while CI engines are low speed. SI engines have a lower thermal efficiency than CI engines.

What is the basic difference between SI and CI engine?

Now Let’s See the Difference Between SI and CI Engine:

SI Engine CI Engine
The compression ratio is 6 to 10. The upper limit is fixed by the antiknock quality of the fuel. The compression ratio is 16 to 20. The upper limit is limited by the weight increase of the engine.

Is fuel pump used in CI engine?

Early CI engines used air pressure to deliver the fuel into the cylinder, but nowadays liquid fuel, supplied by a reciprocating plunger pump, is delivered through small bore steel pipelines to the injector, which breaks up the fuel to the required degree and deliver it to combustion region in the chamber.

Which is not use in CI engine?

Why methanol is not used in CI engine? Explanation: Methanol is not used in CI engines because of its high octane number and low cetane number.

What are the main components of CI engine?

Important components of internal combustion engines include:

  • Fuel systems.
  • Lubrication systems.
  • Air intake systems.
  • Exhaust systems.
  • Cooling systems.
  • Electrical systems.

Which of the following is used in CI engines?

Platinum and palladium are two main catalyst materials used for converters on CI engines. Explanation: Platinum and palladium are only the two main catalyst materials that are used for converters on CI engines.

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Which is the compression pressure of CI engine?

Four-Stroke Cycle CI Engine

The compression ratio varies from 14:1 to 22:1. The pressure at the end of the compression stroke ranges from 30 to 45 kg/cm2. The temperature near the end of the compression stroke is 650–800°C.

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