The marine diesel engines found on yachts and other larger ships. These engines use diesel fuel instead of gasoline because it gives them more power, but less speed, as such, are well suited to vessels that require a lot of energy to move the mass overwhelming , but can not reach particularly high speeds ( again, due to its mass). Most merchant ships using two-stroke engines, as they are the most efficient marine diesel engines.
marine diesel engines

Fuel pump and injector
The fuel pump diesel fuel pumped into the fuel injector , which converts the diesel into a fine spray, forcing it through holes. The reason it does this is to pressurize the diesel, because diesel engines do not use spark plugs, so they need only light pressure. Fuel injectors funcionna a needle system. The diesel enters the tube from the side, forcing the needle while doing so. Once the pressure is great enough, the diesel is released in vapor pressure, which in turn returns the latch downward. The process is repeated when the next batch of diesel into the system.

 

Piston, connecting rod and shaft
The piston is where the energy goes. When the piston cylinder is filled with pressurized diesel, the heat in the cylinder causes it to explode. This forces the piston motion down , That moves the connecting rod. The connecting rod is connected between the piston and the axis or shaft. When the piston moves, so does the crankshaft, but in a movement circle , thus changing the movement upward and downward movement of the piston in a circle which can power the ship. The crankshaft is connected tothe motors , which rotate as it rotates.
Valve and camshaft
Each piston is triggered by an explosion; these explosions create exhaust gas must go somewhere. The exhaust is expelled through the opening of the exhaust valve. However, the real component in this equation is the camshaft. The camshaft is connected to the crankshaft, and rotates at the same velocity as it. The reason it does is because alternating between two functions: the opening of the exhaust valve and the fuel pump. With each downward stroke of the piston opens and allows vapors to escape, and each upward stroke pumps more fuel.