Principles of Diesel Engine and Gasoline Engine, and Their Points of Difference

A diesel engine draws in air alone it intake stroke and the air is compressed so tightly as to becomes very hot. A fine spray of fuel
injected in it ignite just by contacting with hot air.

Points of different between diesel engine and gasoline engine

	Diesel Engine	Gasoline Engine	Advantages and disadvantages of diesel engine
Fuel	Heavy oil, light oil, etc	Gasoline	(Advantages) Diesel fuel is cheaper per liter and fuel consumption per horsepower is lower
Fuel consumption g/Ps/H	170-210	230-270
Flashing point of fuel	Higher than 50⁰C	Higher than -25⁰C	(Advantage) Diesel fuel needs less attention in handling
Compressing ratio	14-22 (air only)	5-10 (mixed gas)	(Advantage) Diesel engine is more powerful.
Ignition	Not required	By electric spark	(Advantage) Igniting device is not require

A gasoline engine is an engine which compresses mixed gas of fuel (gasoline) and air in cylinders and developes power by igniting it with the electric spark at the end of the compression.

Column1	Diesel Engine	Gasoline Engine	Advantages and disadvantages of diesel engine
Method of atomization of fuel	Fuel sent from injection pump through injection valve is injected as it is into the cylinders	Carburator is required for preparing mixed gas when air is sucked in.	(Disadvantage) Injection device is required and maintenance is somewhat difficult
Weight (kg/PS)	3-9.	0.5 - 3.5	(Disadvantage) Higher manufacturing cost
Output per stroke volume of piston PS/l	-20	30 - 50
Vibration	Large	Small	(Disadvantage) Large vibration
Pate of trouble	Small	Large	(Advantage) Unexpected trouble is rare