{
  "$type": "site.standard.document",
  "description": "To provide a control apparatus for an internal combustion engine, which can generate exhaust pressure pulsation at an early period while suppressing the degradation of volumetric efficiency and can effectively utilize a scavenging effect while softening a torque difference, when a request to…",
  "path": "/patents/1009058",
  "publishedAt": "2011-10-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02B25/145",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "To provide a control apparatus for an internal combustion engine, which can generate exhaust pressure pulsation at an early period while suppressing the degradation of volumetric efficiency and can effectively utilize a scavenging effect while softening a torque difference, when a request to enhance the exhaust pressure pulsation is made in the internal combustion engine which includes a variable valve mechanism that makes a valve overlap period changeable, and a variable nozzle type turbocharger. When a request to enhance the exhaust pressure pulsation (acceleration request) is detected, the opening degree of the variable nozzle 22c is fully closed and the valve overlap period is set to zero, further, the changeover valve 44 is closed. Thereafter, after it is judged that the exhaust pressure pulsation has been enhanced, the opening degree of the variable nozzle 22c is opened to an opening degree with a high turbo efficiency. Then, after this opening degree control of the variable nozzle 22c is conducted, at the stage where turbo efficiency has begun to improve, the valve overlap period is set so as to overlap with a timing at which a trough of the exhaust pressure pulsation comes and the changeover valve 44 is temporarily opened over several cycles.",
  "title": "CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE"
}