Question
Why we do not use same technology to start both si/cl engine ?
Answers
The S.I. or spark ignition engine uses petrol. as a fuel and the Ci. or compression ignition engine uses diesel as a fuel. Both the fuels has different compression ratio.

In SI engine the compression ratio is 8-12:1.
In CI engine the compression ratio is 16-22:1.

So in case of SI engine, the compression ratio is not sufficient for fuel to burn so a spark plug is used, whereas in ci engine, the compression ratio is so high that due to its internal heat the fuel is combusted so there is no need for a spark plug. So the technology used in SI engine is different from CI engine.   Your Comment




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