{
  "$type": "site.standard.document",
  "description": "An exhaust gas purification device, which purifies exhaust gas in first and second exhaust paths (20A, 20B) extending from an internal combustion engine is provided. The device includes a convergence path (22) extending from the area of convergence of the first and second exhaust paths, a first…",
  "path": "/patents/969155",
  "publishedAt": "2014-10-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B01D53/9477",
    "TOYOTA JIDOSHOKKI KK [JP]"
  ],
  "textContent": "An exhaust gas purification device, which purifies exhaust gas in first and second exhaust paths (20A, 20B) extending from an internal combustion engine is provided. The device includes a convergence path (22) extending from the area of convergence of the first and second exhaust paths, a first auxiliary NOx catalyst (25A) provided in the first exhaust path, a second auxiliary NOx catalyst (25B) provided in the second exhaust path, a main NOx catalyst (26) provided in the convergence path, a first addition section (30A), which adds an ammonia source in a first addition amount to a section upstream of the first auxiliary NOx catalyst, thereby supplying urea water to the first auxiliary NOx catalyst, and a second addition section (30B), which adds an ammonia source in a second addition amount to a section upstream of the second auxiliary NOx catalyst, thereby supplying urea water to the second auxiliary NOx catalyst.",
  "title": "EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE"
}