Question

Which of the following is not a stage of combustion in an SI engine?

• A. Ignition lag
• B. Flame propagation
• C. After burning
• D. Stratified combustion

Hint:

Stratified combustion is often employed in gasoline direct injection engines to reduce emissions and increase efficiency.

Answer 1

The Correct Option is D

Stratified combustion is not a stage of combustion; rather, it is a technique used in some engines to improve fuel efficiency by varying fuel concentrations throughout the combustion chamber.