Quevuelvanloslentos Auto Centre

The cycle diesel has many similarities with the cycle Otto or gasoline. Like the petrol engines, the diesel also can operate in cycles of two and four times, but here we are going to explain the functioning of diesel engine of four times.
Not all diesel engines are equal. At the beginning, the vast majority functioned with mechanical pumps very complicated and had pre injection. Now, the standard prevailing is the direct injection of Fuel through common and electronically controlled. In addition, also often count with turbo, although this element will explain separately in its own section.

We have to know some elements and definitions to understand the functioning of diesel engines:

The candle of preheating:
Completely different to those in gasoline engines, it is an element that provides heat to facilitate the boot when the engine is cold.

Compression ratio:
There is a relationship between the maximum volumes of the camera generated between piston and cylinder, and the minimum. The maximum volume is the existing when the piston is located in the impasse lower. The minimum volume of the camera is that there when the piston is at the top dead. In diesel engines the compression ratio is much higher than in gasoline engines.
Taking the minimum volume and value 1, the compression ratio measures the number of times the maximum volume contains at least.

The shooter:
As in the existing engines of petrol, diesel engines have injectors responsible to inject the fuel in the combustion chamber. Both the number of nozzles as the rapidly to control the injections have a tremendous importance in the final result of the mechanics in question. In addition, the pressure of injection into the diesel is clearly superior to the petrol, can reach up to 2000 bars of pressure and perform multiple injections per cycle.

The four times are as follows:
Cycle of admission: With the valves for admission open, the piston performs a race to the bottom. The depression formed in the cylinder makes between outside airs.
Cycle of compression: valves for admission and escape are closed and the piston performed his career from the point died less than the top dead. During the last part of the cycle of compression is the Fuel injection at high pressure. In the modern engines injection is performed in several stages, although to facilitate understanding of the operation of diesel will see here as a single injection.
Combustion Cycle: The combustion cycle begins even before they have reached the piston to the top dead. The mixture of Fuel and air reaches a huge temperature due to the compression ratio is very high, and is due to this temperature that the mixture is auto mix without the need to resort here to spark plugs of any kind. Due to the combustion of mixing the piston is pushed down, producing the work required to provide movement to the mechanics.
Cycle of escape: again in the race ascendant, the piston pushes the gas resulting from the explosion toward the escape through the valves, which are open.

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