The higher combustion chamber wall temperature in compression ignition engines will _________ knocking tendency.

Solution(By Examveda Team)

In compression ignition engines (also known as diesel engines), the combustion process is initiated by the heat generated due to the high compression of the air-fuel mixture in the combustion chamber. The temperature of the combustion chamber walls plays a significant role in the combustion process.

When the combustion chamber wall temperature is higher, it leads to increased pre-ignition or auto-ignition of the fuel-air mixture before the intended ignition timing. This phenomenon is known as knocking or detonation. Knocking causes undesirable effects such as engine noise, reduced engine efficiency, and potential damage to engine components.

Therefore, the higher combustion chamber wall temperature in compression ignition engines will increase knocking tendency