| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance efficiency in regeneration of a collector and prevent an engine or other equipment of an exhaust passage from damaging due to the regeneration of the collector in an exhaust emission control system.SOLUTION: An exhaust emission control system (12) includes: a control device (25) having a regeneration timing determination means (29) for determining a regeneration timing of a collector (14A); a bypass passage (16A) that leads some intake air of an engine (1) to an exhaust passage (10); a temperature rising device (21A) that is provided on the upstream side of the collector (14A) and increases a temperature of gas flowing in the exhaust passage (10); and a driving device (23A) that controls a drive amount of the temperature rising device (21A). When the regeneration timing of the collector (14A) is determined, the temperature of the gas flowing in the exhaust passage (10) is increased by the temperature rising device (21A) and regeneration of the collector (14A) is executed.</p> |
