{
  "$type": "site.standard.document",
  "description": "A particulate filter (12) integrally carrying an oxidation catalyst is arranged in an exhaust pipe (9) through which exhaust gas from a diesel engine flows (1). A NOx-absorption reduction catalyst (11) is arranged in the exhaust pipe (9) and downstream of the particulate filter (12). A bypass line…",
  "path": "/patents/1075347",
  "publishedAt": "2005-08-03T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N13/009",
    "HINO MOTORS LTD [JP]"
  ],
  "textContent": "A particulate filter (12) integrally carrying an oxidation catalyst is arranged in an exhaust pipe (9) through which exhaust gas from a diesel engine flows (1). A NOx-absorption reduction catalyst (11) is arranged in the exhaust pipe (9) and downstream of the particulate filter (12). A bypass line (17) is branched from a portion of the exhaust pipe (9) between the particulate filter (12) and the reduction catalyst (11) and is connected to a portion of the exhaust pipe (9) downstream of the reduction catalyst (11). A selector valve (18) is arranged at the branch point of the bypass line (17) and may be switched over to guide the exhaust gas either to the reduction catalyst (11) or to the bypass line (17). As a result, without difficultly controlling the operation of the diesel engine (1), the reduction catalyst (11) is prevented from being poisoned and deteriorated by sulfate, the lowering of the ratio of NOx purification through the NOx-absorption reduction catalyst (11) is averted and prolongation of its life is attained.",
  "title": "Exhaust aftertreatment system"
}