| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust cleaning device for an internal combustion engine that can efficiently clean NOx even in a specific period after the restoration from fuel cut. <P>SOLUTION: The exhaust cleaning device 1 for the engine 2, which includes a first TWC 41 and a second TWC 42 that are provided in an exhaust pipe 4 of the engine 2 and where Rh is carried on a composite oxide including lanthanoid and Zr, includes an excessive air ratio control part that controls excessive air ratio of an air-fuel mixture in a combustion chamber of the engine 2 so that steam reforming reaction proceeds and hydrogen is generated in at least one of the first TWC 41 and the second TWC 42 in the specific period after the restoration from the fuel cut. <P>COPYRIGHT: (C)2013,JPO&INPIT |
