| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform EGR, even during regeneration of a particulate filter 16. <P>SOLUTION: When a filter regenerating condition is established in low rotation-low load operation of an engine, exhaust gas is recirculated via a bypass passage 25 bypassing an EGR cooler 23, and cylinder injection is performed for injecting a part of fuel into a cylinder in an expansion stroke, Thus, the temperature of the exhaust gas exhausted from the engine 1 is raised. The fuel is injected from an exhaust passage injection valve 22 arranged on the downstream side of a branch point of an EGR passage 21 in an exhaust passage 3, and unburnt fuel is supplied to an oxidation catalyst 15, and a filter 16 is heated by using oxidation reaction heat of the unburnt fuel. <P>COPYRIGHT: (C)2010,JPO&INPIT |
