{
  "$type": "site.standard.document",
  "description": "The present disclosure discloses an intake oxygen concentration control system suitable for an engine with lean NOtrapping technology. The system adopts an exhaust turbocharging device to provide a pressure difference for an oxygen-enriched membrane to generate oxygen-rich and oxygen-deficient…",
  "path": "/patents/1289036",
  "publishedAt": "2021-04-29T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/0002",
    "Tianjin University"
  ],
  "textContent": "The present disclosure discloses an intake oxygen concentration control system suitable for an engine with lean NOtrapping technology. The system adopts an exhaust turbocharging device to provide a pressure difference for an oxygen-enriched membrane to generate oxygen-rich and oxygen-deficient gases, and controls the intake oxygen concentration of different cylinders by adjusting the opening of flow control valves to match lean and rich combustion cycles of a lean NOtrapping system. In a lean combustion cycle, all four cylinders are filled with an oxygen-rich gas, which can make the combustion more complete and improve the thermal efficiency and fuel economy. In a rich combustion cycle, one of the four cylinders is filled with an oxygen-deficient gas, and the other three cylinders are filled with air or an oxygen-rich gas with a low concentration, so that less fuel is required to create a reducing atmosphere to realize the release and reduction of NOin a lean NOtrapping device, thereby reducing the fuel consumption and ensuring the output power of the other three cylinders.",
  "title": "INTAKE OXYGEN CONCENTRATION CONTROL SYSTEM SUITABLE FOR ENGINE WITH LEAN NOx TRAPPING TECHNOLOGY"
}