Internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsShizuo Sasaki, Takekazu Ito
Life of this patent
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Abstract
A fuel injector and a spark plug are arranged inside a combustion chamber of an internal combustion chamber. Fuel is injected from the fuel injector at the end of the compression stroke. When the amount of EGR gas is increased, the amount of production of soot peaks. When the amount of EGR gas is further increased, soot is no longer produced. The amount of EGR gas in the combustion chamber is made larger than the amount of EGR gas where the amount of production of soot peaks. Due to this, the production of soot in the combustion chamber is suppressed.
Claims19
An internal combustion engine provided with a spark plug for igniting fuel injected into a combustion chamber, wherein an amount of soot produced peaks when an amount of inert gas in the combustion chamber is increased and fuel injection timing in a compression stroke is delayed, and wherein, switching means is provided for selectively switching between a first combustion where substantially no soot is produced as the amount of inert gas in the combustion chamber exceeds the amount of inert gas at which the amount of soot produced peaks and a second combustion where the amount of inert gas in the combustion chamber is smaller than the amount of inert gas at which the production of soot peaks.
Dependencies are inferred from the claim text.