Diesel engines are the second most popular engines in the automobile industry. It is believed by many people that diesel engines might be the basic engines for automobiles in the future. However, there are also people who think that diesel engines are becoming more obsolete. Whatever the case might be, diesel engines are getting produced every year in millions throughout the world. Diesel engine reconditioning or the repairing of diesel engines requires many expert mechanics and that is why this field is gaining more recognition day by day.It was steward who had invented engine from compression with the ignition. He was very keen on understanding the working of an engine without the help of spark plugs.
The engine that Steward had created contained air which was compressed and let out by the combustion chamber. But, the downside of it was that Steward had not checked the capability of the engine. It was Rudolf Diesel who had invented the “economy heat engine” in the year 1890. It was way more efficient because of the high compression ratio. He had suggested using coal powder in the engines, but it was difficult to implement in real life due to its abrasive properties. So, it was decided that the left-behind tailing after oil refining in such engines would be used.
But this idea too did not work out. So, in the 20thcentury a different approach was taken towards diesel engines. It was Robert Bosch who had improvised on each and every part of the engines therefore making it more capable in nature.
Diesel Engine Reconditioning: Technical Details In order to understand diesel engine reconditioning it is important to learn about the different parts of the diesel engine. The way diesel engines are designed is quite similar to the design of petrol engines. Both of them have very similar parts, for example valves, cylinder, pistons etc. But in diesel engines instead of the usual spark, the fuel air gets ignited at a high temperature of the compressed air. Let’s take a look at the principle working parts of a diesel engine.
1st Stroke: The piston moves down until the lower dead point and fresh air gets blown from the valve intake.
2nd Stroke: The piston moves to the upper dead point and hence the air contained in the cylinder gets compressed several times. This makes the temperature rise up to 700 to 800 degree Celsius.
3rd Stroke: The moment the piston reaches the upper dead point, the fuel gets injected into the cylinder. The fuel air mixture expands, and the piston continuously goes down.
4th Stroke: Since the piston goes down, the gases get exhausted and are hence thrown into the open exhaust valve.
The fuel contained in the cylinder makes it ignite and thus with a rapid pressure jump the engine gets off to a noisy start. In order to preserve the safety of operation in the required level, the diesel engine is hence designed in a more durable way than petrol engines. More durability makes it more heavyweight. Understanding these parts of the diesel engine is crucial before you move on to diesel engine reconditioning. Only capable diesel engineers are able to pinpoint the problem and fix it. Petrol mechanics that are familiar in working with petrol engines might not be able to fix diesel engines. Diesel mechanics can only take part in diesel engine reconditioning, one of the main reasons being that diesel engines are much more complicated than petrol engines, plus the fuel supply system differs largely in diesel engines.