Why is the combustion of a diesel and petrol engine diffirent?
http://en.wikipedia.org/wiki/Diesel_cycl e
The combustion stage of a diesel is constant pressure (2-3)
http://www.qrg.northwestern.edu/thermo/d esign-library/otto/Otto-Pv-diagram.gif
while the combustion stage
It all down to liquid fuel not burning. It's the vapours that burn
petrol is volatile, and evaporated in to a "gas" before the combustion stroke (outside the engine in a carb, or injected during intake/compression stokes) . This
