Question

If due attention is not given to the valve size, valve timing and valve flow coefficients there may be a substantial loss with the increase in engine speed.

(a) True

(b) False

I have been asked this question in an internship interview.

I would like to ask this question from Total Engine Friction in section Engine Friction and Lubrication of IC Engine

Answer 1

The correct answer is:

(a) True

If proper attention is not given to the valve size, valve timing, and valve flow coefficients, it can result in substantial losses at higher engine speeds. These factors significantly affect the engine's efficiency by influencing the air/fuel intake and exhaust gas expulsion processes. At higher speeds, inefficient valve operation can limit engine performance and increase friction losses.