Diesel Engine at is Finest
Diesel engines can be broadly distinguished as two-stroke and four-stroke. Bulky engines usually operate on the two-stroke cycle. Lighter engines generally operate on four-stroke cycle.
Generally cylinders are used in multiples of 2, 4, 6, or 8, .It doesn't matter what number of cylinders are being used as long as the load on the crankshaft is counterbalanced to prevent excessive vibration. The inline-6 cylinder is used widely in medium and heavy duty engines.
How these engine work? The temperature of gas rises when it is compressed. When the inlet valve opens air is sucked into the cylinder of a Diesel Enginesdue to vacuum created. The piston then moves upward and compresses air raising its pressure and temperature. As the piston moves up towards the end of compression stroke, injection of diesel fuel the combustion chamber that is cylinder takes place. There is high pressure inside cylinder so the fuel is injected through an atomizing nozzle at reasonably high pressure. The mixture of fuel and air then ignites and burns rapidly. The gas in the chamber expands. This forces the piston to move down and thereby producing power stroke. The connecting rod which is linked to crankshaft forces it to turn and delivers rotary power at the output end of the crankshaft. Scavenging of the engine is completed either by ports or valves
Accessorizing a turbocharger is a vital accessory and is used to compress the intake air. To increase the efficiency an after cooler/intercooler is used to cool the air after compression. Speed of the engine can be controlled using Governor by adjusting the rate of fuel delivery. In cold weather conditions these Diesel Enginescan prove problematic. To overcome this problem small electric heater called glow plug is used inside the cylinder to warm the cylinders prior to starting. While you can also have resistive grid heaters in the intake manifold to warm the inlet air until the engine reaches operating temperature. Engine heaters fixed into the utility grid are mostly used when a Diesel Enginesis shutdown for long period in cold weather to lessen the startup time and engine wear.
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