Question

The frictional mean effective pressure ____________ as the compression ratio is increased.

(a) increases

(b) decreases

(c) remains same

(d) none of the mentioned

I had been asked this question in my homework.

I need to ask this question from Total Engine Friction in division Engine Friction and Lubrication of IC Engine

Answer 1

The correct answer is:

(a) increases

As the compression ratio is increased, the frictional mean effective pressure (FMEP) generally increases. This is because higher compression ratios result in higher pressures within the engine, which leads to increased frictional losses in the engine components such as the piston rings, cylinder walls, and valves.