Question

Which of the following has the same combustion as HCCI (Homogeneous Charge Compression Ignition) engine?

(a) SI engine

(b) CI engine

(c) Hybrid of both SI and CI engine

(d) Wankel engine

This question was addressed to me in an international level competition.

I need to ask this question from Nonconventional Engines topic in section Nonconventional Engines, Conventional Energy Sources & Cooling System of Automobile Engineering

Answer 1

Correct choice is (c) Hybrid of both SI and CI engine

To explain: HCCI engine has the same combustion as a hybrid of both SI and CI engine. HCCI is a form of IC engine in which well-mixed fuel and air are compressed to the auto-ignition temperature of the fuel.