Question

With greatly increased mixing efficiency and speeds, large regions of fuel-rich mixtures can be avoided when combustion starts.

(a) True

(b) False

The question was asked in a job interview.

My question is taken from C.I. Engines in division Engine Emissions and their Control of IC Engine

Answer 1

The correct answer is:

(a) True

With greatly increased mixing efficiency and higher combustion speeds, large regions of fuel-rich mixtures can indeed be avoided when combustion starts. Improved air-fuel mixing helps in achieving more uniform combustion, which reduces the formation of local areas with excess fuel that could lead to higher emissions, such as particulate matter or unburned hydrocarbons.