These engines can be divided into four-stroke engines and two-stroke engines. The working principles of these engines are similar. But their way of working is different due to slight structural differences.

Four-stroke engine:

These engines are actually the same engines that were invented by Otto, and their designation is that these engines must perform four stages of suction, compression, explosion and discharge for each explosion (the stage of converting fuel energy into mechanical energy).

Two-stroke engines:

The inventors of the era of Otto believed that the presence of only one power stage in two revolutions of the engine is a big loss. Therefore, they turned their attention to an engine that had an explosion in every revolution. This work is done by combining the stages of explosion and inhalation and exhalation as one stage and the combination of evacuation and compression as the next stage.

How do two-stroke diesel engines work?

The article on how diesel engines work is an explanation about four-stroke engines that are generally found in cars and trucks. The article on how two-stroke diesel engines work is an explanation about small two-stroke engines that are used in Things like chainsaws, small motorcycles and jet skis can be found. The combination of diesel engine technology with a two-stroke diesel engine often produces a favorable result in large diesel engines that are found in locomotives, large ships, and power generators. Is.

In this article, we will have an explanation about the technology of two-stroke diesel engines and we will learn about the big engines that use this technology.

How the cycle works

If you read the article How Two-Stroke Engines Work, you will learn that a big difference between two-stroke and four-stroke engines is the amount of power the engine can produce.

The spark plug in the two-stroke engine sparks twice, each in each crankshaft revolution, but in the four-stroke engine, the spark is fired once in every two crankshaft revolutions. This means that the two-stroke engine has twice the power generation potential of the four-stroke engine of the same size.

The two-stroke engine article also explains the cycle of a diesel engine, where gas and air are mixed and compressed, which is not really completely compatible with how a two-stroke engine works. The problem is that some of the fuel is not burned. which is used again for the air-fuel mixture every time it comes out of the cylinder. (See how two-stroke engines work for details)

It seems that the diesel process, where the air is compressed alone and then the fuel is injected directly into the compressed air, is much better suited to the two-stroke cycle.

Therefore, many manufacturers of large diesel engines use this procedure to produce engines with high power.