Question

State two modifications in the design of an engine that do not only improved the efficiency of the engine but has also reduced pollution

Answer 1

5 Engine Modifications to Improve Performance. ... More fuel alone going into the engine wouldn't work, because of the delicate relationship between the oxygen in the air and the fuel required for the combustion. Instead, modifying your car's engine to accept more air and fuel is the key.

Answer 2

Answer:

Explanation:

• There is increase in use of diesel engines which affect the environment.
• The efficiency of an engine can be improved by different ways-

To run the engine on fuel- lean

Higher compression ratio

We also need new cycles which can be practically done

Run engine at optimum conditions

• Higher injection pressure can also lower sooth emissions.
• The great difference in temperature between the fuel's combustion temperature and that of its surrounding affects the engine efficiency.
• The electric engine is most efficient.
• Electric motors are very efficient at converting electricity into work.
• Engine emission can be reduce by- switching driving style, keeping up to date service, regularly check tire pressure, using fuel additive, only drive when necessary.

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