| 摘要 |
<P>PROBLEM TO BE SOLVED: To rise exhaust temperature suppressing the generation of smoke, reduce the air-fuel ratio in exhaust, and regenerate a NOx trap catalyst, etc. <P>SOLUTION: Prior to main combustion to generate engine torque, preliminary combustion to form prescribed heat generation P is conducted. The preliminary combustion is conducted close to an upper dead center by first fuel injection. The main combustion is delayed to other times to be conducted by second fuel injection after completion of preliminary combustion. In accordance with a target excess air ratio tλ, a target EGR ratio tRegr is varied. The lower the value tλ is, the more the value tRegr is reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
