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Some Comparisons between a Petrol and Diesel Engine - Coggle Diagram
Some Comparisons between a Petrol and Diesel Engine
:
Petrol Egines
1:
A petrol engine draws a mixture of petrol and air during the suction stroke.
2
: The pressure at the end of the compression is about 10 bar.
3
: The combustion of fuel takes place approximately at constant volume. In other words, it works on Otto cycle
4
: The thermal efficiency is up to about 26%.
5
: The running cost of petrol engine is high because of the higher cost of petrol fuel.
6
: The maintenance cost is less.
7
: Petrol engines are high-speed engines.
Diesel Engines
1
: A diesel engine draws only air during the suction stroke.
2
: The pressure at the end of the compression is about 35 bar.
3
: The combustion of fuel takes place approximately at constant pressure. in other words, it works on Diesel cycle.
4
: The thermal efficiency is up to about 40%.
5
: The running cost of the diesel engine is low because of the lower cost of diesel fuel.
6
: The maintenance cost is more.
7
: Diesel engines are relatively low-speed engines.
