Quote Originally Posted by gestapo
di ko pa rin masyadong maintindihan yung diesel engine. i need someone who can explain it to me.:mrgreen::mrgreen::mrgreen::mrgreen:
di ba ang mga substances meron sila kani-kanilang burning point (temperature at which they will start to burn). so sa loob ng cylinders ng isang diesel engine, unang pumapasok ang air (1st stroke), then the air will be compressed upto the burning point of the diesel fuel (2nd stroke), at which point the diesel fuel is injected and ignited/burned by the high temperature air causing the piston to go down (3rd stroke). the 4th stroke simply ejects the ignited air-fuel mixture (the smoke).

you will also notice that the compression ratio of diesel engines are much higher than gasoline engines. gas engines don't need very hot air to burn the gasoline, they have spark plugs that will do the igniting. the air is just needed for the gasoline to burn.