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Question

During the combustion process in compression ignition engines, increasing which of the following parameter would increase the delay period

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A.

Compression ratio

B.

Intake temperature

C.

Intake pressure

D.

Injection advance angle

Answer ( Option D)

Injection advance angle

Solution

  • Engine operating variables such as speed and load affect the ignition delay because they change the primary factors such as injection pressure, compression temperature, pressure and air velocity.
  • It has been found that under normal running conditions, compression temperature and pressure are the major factors.

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