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The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is called a compression-ignition engine (CI engine).
In a diesel engine, ignition is achieved by compression of air alone. A typical compression ratio for a diesel engine is 20:1, compared with 9:1 for a petrol engine. Compressions as great as this heat up the air to a temperature high enough to ignite the fuel spontaneously, with no need of a spark and therefore of an ignition system.
Diesel Fuel Injection System (A Major cost of the diesel engine) • Performs fuel metering • Provides high injection pressure • Distributes fuel effectively – Spray patterns, atomization etc. • Provides fluid kinetic energy for charge mixing. Typical systems: • Pump and distribution system (100 to 1500 bar)
1 gru 2020 · Diesel engines are equipped with one of several distinct types of fuel injection systems: individual pump system; multiple-plunger, inline pump system; unit injector system; pressure-time injection system; distributor pump system; and common rail injection system.
Diesel Fuel Injection System. (A Major cost of the diesel engine) Performs fuel metering. Provides high injection pressure. Distributes fuel effectively. Spray patterns, atomization etc. Provides fluid kinetic energy for charge mixing. Typical systems: Pump and distribution system (100 to 1500 bar) Common rail system (1000 to 1800 bar)
Unlike a gasoline engine, a diesel engine does not require an ignition system because in a diesel engine the fuel is injected into the cylinder as the piston comes to the top of its compression stroke.
Diesel Engine Combustion. Characteristics of diesel combustion. Different diesel combustion systems. Phenomenological model of diesel combustion process. Movie of combustion in diesel systems. Combustion pictures and planar laser sheet imaging.
