Question

The operation of the purge control valve is taken care of by the exhaust ____________ pressure.

(a) front

(b) back

(c) middle

(d) none of the mentioned

I had been asked this question by my school teacher while I was bunking the class.

My doubt stems from Exhaust Gas Recirculation in portion Engine Emissions and their Control of IC Engine

Answer 1

The correct answer is:

(b) Back

The operation of the purge control valve is typically controlled by the exhaust back pressure. This pressure helps regulate the flow of fuel vapours from the charcoal canister into the engine during the purging process, ensuring that the vapours are drawn into the intake system and burned during combustion.