To release the chemical energy in diesel effectively, an atomized form of the fuel is made to contact with high temperature and high pressure air. A diesel engine usually operates by repeating a cycle of four-stage or strokes combustion principle, also known as the otto cycle. The chemical energy release (combustion) is effectively transferred as mechanical rotational energy. The operation of a diesel engine is all about producing high temperature and high pressure air continuously.
There have been different opinions across industry experts over what makes a good diesel engine. It could probably be due to different requirements that each individual has over the use of their engines. However here are some of the common factors that came up regularly while speaking to industry experts, and most use them to evaluate what makes a good engine.
Knowing what to check will give you a good indication of an engine’s overall condition An engine inspection may seem a huge task for individuals like me who are not trained in engines/machineries, however after speaking to some thought leaders in the industry, here are some insights that they share, and how they would go about conducting an engine inspection.
The mechanical design of internal combustion engines, particularly diesel engines is a challenging and interesting task. Since the combustion process in the diesel engine is never uniform and smooth, they are prone to more vibration and noise compared to petrol engines. Thus diesel engines require a rugged structural design. Out of the four strokes, it is only during the power stroke that a tremendous amount of force is exerted on the piston. So a single cylinder engine will always have high force non-uniformity.