Due to the high compression of the air in the cylinder, the pressure and temperature of the air are increased which is sufficient to self-ignite the fuel which is injected at the end of the compression Stroke. Now the fuel is injected into the cylinder by the high-pressure fuel injecter at the end of compression stroke. The air which is occupied by the cylinder is compressed into the clearance volume which is available when the piston is at the TDC. Due to this, the air which is drawn into the cylinder will be compressed. During this stroke, both the inlet and exhaust valves are closed. i.e the piston reaches the BDC.ĭuring the Compression stroke, the piston moves from the Bottom Dead Centre(BDC) to the Top Dead Centre (TDC). Compression strokeĬompression Stroke starts right after the suction stroke completes. When the piston reaches the bottom dead centre (BDC), the suction stroke will end. Suction will be created in the cylinder due to the movement of the piston downwards (Bottom Dead centre) the air will be drawn into the cylinder. At this time the Inlet valve is opened and the exhaust valves are closed. Suction Stroke starts when the piston is at the top dead centre(TDC) and about to move downwards. The cycle of operation of a four-stroke Diesel engine consists of the following strokes: This 4 Stroke Diesel Engine was invented by Rudolf Diesel in 1876, so this why this Engine is called the Diesel Engine.they are suction and the compression combustion, expansion, exhaust. During these four-strokes, there are five actions/events to be completed.All the four strokes will be completed in the 720° of the crank rotation.In 4 Stroke Diesel Engine, the Thermodynamic cycle will be completed in the four strokes of the position or the two revolutions of the crankshaft.The compression ratio of the Diesel engines is ranging from 16 to 12 where the Petrol engines it will be around 6 to 10.The 4 stroke Diesel engine is similar to the 4 Stroke Petrol Engine but the only difference is that in 4 Stroke Petrol engine we use the Sparkplug to ignite the air-fuel mixture, In Diesel engines (Compression Ignition Engines), we use high compression ratio to air to reach high temperature which is sufficient to self-ignite the injected the fuel.4 Stroke Diesel Engine | 4 Stroke Compression Ignition Engine Spark Ignition: Usually a petrol engine, where the combustion process of the air-fuel mixture is ignited by a spark from a spark plugĬompression ignition: Generally the Diesel Engines, where the combustion process is caused by the elevated temperature of the air in the cylinder due to the mechanical compression. IC engines work on either Spark ignition or the Compression Ignition working principle. In this article, we are going to discuss the 4 Stroke Diesel Engine working principle. 4 Stroke Diesel Engine is also known as the 4 stroke Compression Ignition Engine.
An internal combustion engine is a heat engine where it undergoes different cycles of operations in a sequent manner to convert the thermal energy into useful work. An Engine is a device which transforms one form of energy into another form of Energy.
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