| 摘要 |
<p>PURPOSE:To enable to regenerate a trap without providing an air pump even in the engine heavy load running region by a method wherein secondary fuel is burnt by high temperature exhaust lead from a catalyst layer, in which primary fuel is supplied. CONSTITUTION:Exhaust particulates, which are caught by a trap 21 provided in an exhaust passage 20, are burnt at a burner device installed on the upstream side of the trap 21. The burner device consists of a primary fuel passage 29, into which part of exhaust is lead and within which catalyst is filled, a primary fuel supplying device 31 to supply primary fuel to the catalyst, a heating device 27 to heat and burn the primary fuel in the catalyst and a fuel supplying device 30 to supply secondary fuel at the outlet of the primary passage 29.</p> |
