How do emissions differ in spark ignition and comp

How do emissions differ in spark ignition and compression ignition engines?

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Technology Questions Chapter 9

INSTRUCTIONS:
Questions are based on chapter 9 of the following book: Air Quality 4th Edition, Thad Godish. This should be the required source. Question 6: How do emissions differ in spark ignition and compression ignition engines? Question 9: What is an equivalence ratio? What is its relationship to pollutant emissions? Question 13: Describe the principle of exhaust gas recirculation and the pollutant that it controls.
CONTENT:
TechnologyName:Instructor:Date:Question 6: How do emissions differ in spark ignition and compression ignition engines? Sparks ignitions uses a spark to ignite the compressed fuel and air mixture. It uses gasoline and natural gas. On the other hand, Compression ignition engines compress air to a higher pressure and so it heats the air to the ignition temperature of the fuel that is then injected. A compression ignition engine contains a higher efficiency than the spark ignition engines due to the compression ratio used in the compression engines. Compression ignition engines uses diesel fuel and oil (Thad, 2003).Question 9: What is an equivalence ratio? What is its relationship to pollutant emissions? The equivalence ratio of a...
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