What are the Various Parts in a Diesel Engine ?


When people think of diesel engines, they often compare them with the standard gasoline engine and picture a sootier and noisier engine. While diesel has the advantage and capabilities to haul large shipments over long distances, this tendency to produce more smoke and noise turns the majority of consumers off. Not only that but they have become strongly associated with trucks and large vehicles. Overall diesel engines are more efficient and thanks to advancements in technology, are steadily more cleaner and less noisier. In this article, we will look closely at diesel engine parts and their various functions.

Diesel engines work very similarly to gasoline engines in that they are both internal combustion engines that are designed to transform chemical energy into mechanical energy for fuel purposes. The mechanical energy can move pistons inside the cylinders, which triggers the crankshaft to rotate enough to propel the wheels of a car forward. Both types of engines also convert fuel into energy through combustion. The differences lie in the method by which these combustions occur. While gasoline engines mix fuel with air before having the pistons compress the mixture, the diesel engine compresses the air first before the fuel is injected. Because the air heats up when compressed, the fuel ignites.

There are many parts involved in this fuel compression process, including but not limited to aftercoolers, alternators, coolants, crankshafts, gaskets, o-rings, radiators, sea water pumps, turbochargers, and many more. Here, we’ll focus on the main players among diesel engine parts.

Pistons: The pistons play a very important role in the diesel role, just as they do for gasoline engines. They have the important job of controlling the volume inside of the cylinder. This is important because the volume determines if the four-stroke engine can work as designed. The three core parts that are on the piston are the the ring compression, the oil ring, and the pin pistons. The ring compression serves to prevent air leaks during compression strokes by closing the space between the piston wall and main liner. The oil ring is designed to block engine oil from seeping into the combustion chamber, and finally, the pin piston is meant to connect the piston with the connecting rod.

Crankshaft: A crankshaft is made of cast iron that is used to move the piston up and down into a rotary movement. It works similarly to how the wheels of a bicycle are moved based on the user’s pedaling. The crankshaft is made up of three different parts including the crank pin, the crank journal, and the weight balance.

Timing chain assembly: Included in the valve mechanism system, the function of the timing chain is to connect the crankshaft and crankshaft rotation. The chain is meant to connect the sprocket gear from the crankshaft to the camshaft.


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