Question

Combustion chamber pump loss is caused due to the pumping work required to pump gases into and out of the pre-combustion chamber.

(a) True

(b) False

This question was posed to me during an online exam.

Enquiry is from Total Engine Friction topic in section Engine Friction and Lubrication of IC Engine

Answer 1

The correct answer is:

(a) True

Combustion chamber pump loss is indeed caused by the work required to pump gases into and out of the pre-combustion chamber, which contributes to the overall pumping losses in the engine. This is particularly relevant in engines with separate combustion chambers, where the movement of gases in and out of these chambers consumes energy, thus creating pumping losses.