| 摘要 |
<P>PROBLEM TO BE SOLVED: To surely and efficiently regenerate control capacity of an exhaust emission control device, in an exhaust emission control system constituted by combining a plurality of branched passages which are branched from an exhaust passage, with exhaust emission control devices disposed to each branched passage. <P>SOLUTION: In regeneration of the control capacity of the exhaust emission control device, the opening an exhaust flow control valve of the branched passage having the exhaust emission control device whose control capacity should be regenerated out of the plurality of branched passages is controlled to have minimum opening where reducing agent added by a reducing agent adding means is surely fed (S102, S103). Upon maintaining the minimum opening, the reducing agent is added by the reducing agent adding means (S105). After addition of the reducing agent is finished, the opening of the exhaust flow control valve is fully closed (S108). <P>COPYRIGHT: (C)2007,JPO&INPIT |
