In order to eliminate knocking in compression ignition engines, there should be

A. Short delay period

B. Late auto-ignition

C. Low compression ratio

D. High self ignition temperature of fuel

Answer: Option A

Solution(By Examveda Team)

In order to eliminate knocking in compression ignition engines, there should be short delay period.
- Add 1% of ethyl nitrate or any nitrate to accelerate the combustion of fuel. This process is known as “Doping” and reduce delay period considerably and hence prevent diesel knock.
- For spontaneous ignition of the fuel, we require much higher temperature this can be achieved by raising the compression ratio.