Diesel fuel
Diesel fuel is a long molecule composed of carbon hydrogen
chains (hydrogen atoms and carbon atoms) extracted from crude
oil. The hydrocarbon chains that make up diesel fuel are longer
than those that make up gasoline. This is what makes diesel fuel
and gasoline different.
Since diesel engines have higher compression ratios, the air
inside cylinders can be heated to the ignition temperature of
diesel fuel. Therefore, diesel engines do not require ignition
systems.
Furthermore, unlike diesel fuel, gasoline generates a flammable
air-fuel mixture that is easy to ignite even at low
temperatures. Therefore, diesel fuel is safer than gasoline.
Additionally, diesel fuel produces more heat by volume than
gasoline. Thus, diesel engines are more fuel efficient than
gasoline engines at the same output.
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