Question

___________ is the time immediately following injection of the fuel during which the ignition process is being initiated and the pressure does not rise beyond the value it would have due to compression of air.

(a) Knocking

(b) Delay period

(c) Startability

(d) None of the mentioned

The question was asked during an interview for a job.

My enquiry is from Delay Period in division Combustion and Combustion Chambers of IC Engine

Answer 1

The correct answer is:

(b) Delay period

The delay period is the time between the injection of fuel and the onset of ignition, during which the fuel undergoes a preparation phase (such as atomization and mixing with air), but the pressure does not rise significantly. It's a crucial phase for proper combustion initiation and engine performance.