Patent ID: 6152118
Filing Date: 2000-11-28
Classification: F02B,F02D,F02M

Abstract:
An internal combustion engine having a combustion chamber with an amount of inert gas within the combustion chamber, the engine gradually increases an amount of soot generated by the engine to a peak amount by increasing the amount of the inert gas within the combustion chamber, the engine does not generate substantially any soot or nitrogen oxides by further increasing the amount of the inert gas within the combustion chamber so that a temperature of a fuel and a surrounding gas during combustion within the combustion chamber is lower than a generation temperature of the soot, the engine comprising:a first combustion in which the amount of the inert gas within the combustion chamber is more that the amount of the inert gas within the combustion chamber when the amount of soot generated by the engine reaches the peak amount so as to generate substantially no soot;a second combustion in which the amount of the inert gas within the combustion chamber is less than the amount of the inert gas within the combustion chamber when the amount of soot generated is substantially equal to the peak amount;switching means for selectively switching between the first combustion and the second combustion; andan operation area having a first operation area and a second operation area, the first operation area having a high load side and a low load side, the first operation area being performed in a low load side of the operation area, and the second operation area being performed in a high load side of the operation area,wherein the first operation area is switched to the high load side of the operation area when an air fuel ratio of the engine decreases.