{
  "$type": "site.standard.document",
  "description": "Process for testing the functionality of a catalyst used for purifying IC engine exhaust gas during operation of the engine comprises equipping the engine with an electronic on-board diagnostics system; and determining the difference DELTA T of the actual catalyst outlet temperature of the exhaust…",
  "path": "/patents/1109947",
  "publishedAt": "2001-09-26T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N11/00",
    "DMC2 DEGUSSA METALS CATALYSTS [DE]"
  ],
  "textContent": "Process for testing the functionality of a catalyst used for purifying IC engine exhaust gas during operation of the engine comprises equipping the engine with an electronic on-board diagnostics system; and determining the difference DELTA T of the actual catalyst outlet temperature of the exhaust gas TA to the starting temperature for carbon monoxide TCO,50%, fresh of the fresh catalyst in each engine operating point and acquiring the degree of conversion rCO for carbon monoxide to judge the remaining activity of the catalyst. DELTA T = TA - TCO,50%, fresh. Preferred Features: The degree of conversion rCO for carbon monoxide is determined as: rCO = 1 - (CCO,2/CCO,1) (where, CCO,2 = the measured concentration of carbon monoxide in the exhaust gas after the catalyst; and CCO,1 = the measured concentration of carbon monoxide in the exhaust gas before the catalyst).",
  "title": "Method for examining the performance of exhaust gas catalyst"
}