The internal combustion engine thermal (Eight), transforms the heat energy (explosion) into mechanical energy. This combustion occurs within the chamber itself is therefore called the internal combustion engine will.
The basis of operation is the detonation of a fuel (in this case gasoline) focus through a heat (plug).
The energy given off after the combustion gases causes the piston that is inside the cylinder down with great force (career). The linear movement of the piston is transformed into rotary crank means. (Similar to a foot-pedal movement).
A cycle consists of four times: 1 Admission, 2 Compression, 3 Explosion and 4 Escape.
Admission. The intake valve is opened by the camshaft and gives way to air mixed with gasoline (in case of carburetor) or just aire (if injected). Piston movement is downwards creating vacuum (in case you have no turbo). El PMS (TDC) is the highest point at which you can get the piston within the cylinder and (PMI) lowest.
Compression: The two valves are held closed, the piston goes up and the mixture is compressed to increase its temperature. (PMS)
Explosion: The spark (plug) and the explosion occurs. The piston moves down violently (time of useful work) thanks to the force exerted by the combustion gases.
Escape: The exhaust valve opens, the piston rises and the hot combustion gases move towards the exhaust.
1 career 180 degrees of crankshaft———- 4 Race = 2 turns of the crankshaft (720º)
Virtually all vehicles circulating on the roads we rely on this operation. The difference is a diesel engine that does not require plug (focus heat). Only in the combustion chamber and the compressed air is heated. At the time that the combustion temperature reaches its greatest (PMS), diesel fuel that combusts only if the air temperature is injected.
Petrol Injection: As in a diesel engine, air enters the intake (independently gasoline), and timely (sensors) gasoline is injected and the spark.
Keep in mind that the amount of engine fuel is important as the air entering the inlet (Caudalímetro).
This type of motor is linear, but there are also rotary (Shaky) and opposed cylinders (Boxer), but the basic operation is the same.