Part of the mechanical energy of the piston, and the kinetic energy of the particles, is transferred to the air increasing its thermal energy and its pressure to a point that allows fuel to ignite – which is not flammable at ambient pressure and temperature. In motors operating under the Diesel cycle, the compression ratio is very high, from 15: 1 to 25: 1.

With the piston in the PMI, the intake valve closes and the crankshaft, which continues to rotate, pushes the piston on the way to the PMS by compressing the air in the combustion chamber without exchanging thermal energy with the environment. The cylinder volume is filled with air from the atmosphere – oxygen – filtered, with approximately one atmosphere pressure. With piston at PMS – dead upper point point – the valve control opens the intake valve, the inertia of the crankshaft moves the piston rod that pulls the piston towards the lower PMI – lower dead point – moving the plunger reduces the pressure in the combustion chamber, upper cylinder and the vacuum created draws air virtually no change in pressure. Description of four-stroke Diesel cycle internal combustion engine Theoretical description of the four cycles of an engine that develops the Diesel cycle – Keep rolling the page and go to a summary table to understand the aspects of the Diesel cycle, fuel injection / auto-ignition.

– It is possible to stop the animation, or to take it to a certain point just drag and drop the pointer of the diagram that marks the four times of the cycle, this action will display more information and handouts

4 stroke internal combustion engine