Question

The exhaust of CI engines does not contain solid carbon soot particles that are generated in the fuel-rich zones within the cylinder during combustion.

(a) True

(b) False

This question was posed to me in class test.

My doubt is from Hydrocarbon Emissions in chapter Engine Emissions and their Control of IC Engine

Answer 1

The correct answer is:

(b) False

The exhaust of CI (Compression Ignition) engines can contain solid carbon soot particles. These particles are generated in the fuel-rich zones within the cylinder during combustion, especially in conditions of incomplete combustion. However, modern engines with particulate filters and other aftertreatment systems aim to reduce these emissions. Nonetheless, in older or less optimized engines, carbon soot particles can still be present in the exhaust.