petrol engine

[chands99]

Please let me know how the petrol engine works

[Ewood27]

This is far too big a subject for a quick answer. Assuming you mean a standard four-stroke car-type engine, then perhaps you would like to click here and you will be transported to a website which will tell you in far more detail (and better) than I could.

[sddsddean]

Just remember...suck,squeeze,bang,blow!

[Gef]

"Just remember...suck,squeeze,bang,blow!" - that sounds more like a jet engine,

[New Forester]

Gef - I suppose each bit of gas or fuel in a jet engine does go through a similar process to that in a reciprocal engine, but as the whole thing is continuous surely it's "roar" instead of "bang"?

[medway26]

Have a look at http://auto.howstuffworks.com/engine.htm There's a lot there but it'll answer your question.