Question

Which supercharger delivers an almost constant level pressure increase at all engine RPM?

(a) Dynamic compressor

(b) Negative displacement

(c) Static compressor

(d) Positive displacement

I had been asked this question in homework.

I'd like to ask this question from Petrol Engine Fuel Supply System in division Exhaust System & Petrol Engine Fuel Supply System of Automotive Engine Design

Answer 1

Right answer is (d) Positive displacement

To explain: Positive displacement supercharger deliver an almost constant level pressure increase at all engine RPM and Dynamic compressor does not deliver pressure at low speeds; above the threshold, speed pressure increases exponentially.