| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve exhaust emission by always supplying a sufficient amount of active oxygen to an exhaust system without increasing a storage amount of active oxygen. <P>SOLUTION: An internal combustion engine 10 includes an ozone generator 16 supplying ozone to a catalyst 14, a storage tank 36 storing ozone and selector valves 44, 46. An ECU 60 carries out one of a normal supply mode, an increment supply mode and a storage mode, according to an operation state of the internal combustion engine 10 and the storage amount of ozone when performing ozone control. In the normal supply mode, ozone is supplied from the ozone generator 16 to the catalyst 14. In the increment supply mode, ozone is supplied from both the ozone generator 16 and the storage tank 36 to the catalyst 14. In the storage mode, ozone is stored in the storage tank 36 by the ozone generator 16. Thus, even in starting or the like, a supply amount of ozone can be sufficiently secured. <P>COPYRIGHT: (C)2010,JPO&INPIT |
