{
  "$type": "site.standard.document",
  "description": "A process for desulfation of a NOx adsorber in a diesel internal combustion engine exhaust system is disclosed, which comprises: determining an amount of post fuel ( Q 2 ) required to reach a relatively rich target exhaust air fuel ratio (AFR rich ) on the basis of a measured air flow; determining…",
  "path": "/patents/983485",
  "publishedAt": "2013-10-09T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N11/00",
    "DELPHI TECH HOLDING SARL [LU]"
  ],
  "textContent": "A process for desulfation of a NOx adsorber in a diesel internal combustion engine exhaust system is disclosed, which comprises: determining an amount of post fuel ( Q 2 ) required to reach a relatively rich target exhaust air fuel ratio (AFR rich ) on the basis of a measured air flow; determining a heating-contributing fuel value ( ·Q 2 ) required to reach or maintain a target desulfation temperature in said NOx adsorber by way of an exothermal reaction; calculating a target air flow (Air tgt ) corresponding to the air flow required for a substantially stoichiometric combustion of a torque-contributing main fuel quantity ( Q 1 ) together with said heating-contributing fuel value ( ·Q 2 ) ; and causing the engine to inject said post fuel amount ( Q 2 ) and said main fuel quantity ( Q 1 ) while controlling the air flow to meet said target air flow ( Air tgt ) .",
  "title": "Lean nox trap desulfation process"
}