Question

Blowby losses ____________ directly with compression ratio.

(a) increases

(b) decreases

(c) remains same

(d) none of the mentioned

The question was asked in class test.

Enquiry is from Total Engine Friction in chapter Engine Friction and Lubrication of IC Engine

Answer 1

ChatGPT said:

ChatGPT

The correct answer is:

(a) increases

Blowby losses increase directly with the compression ratio. As the compression ratio increases, the pressure in the combustion chamber rises, which can lead to higher leakage of combustion gases past the piston rings into the crankcase (blowby). This is because the increased pressure makes it more difficult for the piston rings to seal completely, resulting in greater blowby losses.