{
  "$type": "site.standard.document",
  "description": "Based on entry/exit pressures of compressor 2a detected by atmospheric/boost pressure sensors 13 and 14, pressure ratio of compressor is calculated. Based on mass flow rate and entry temperature of intake air 4 detected by intake air flow-rate/temperature sensors 15 and 16 and entry pressure…",
  "path": "/patents/960952",
  "publishedAt": "2015-05-06T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02B39/16",
    "HINO MOTORS LTD [JP]"
  ],
  "textContent": "Based on entry/exit pressures of compressor 2a detected by atmospheric/boost pressure sensors 13 and 14, pressure ratio of compressor is calculated. Based on mass flow rate and entry temperature of intake air 4 detected by intake air flow-rate/temperature sensors 15 and 16 and entry pressure, volumetric flow rate of intake air is calculated in environmental condition at detection time using gas state equation, and is corrected into volumetric flow rate under standard environmental condition thorough multiplication by corrective coefficient based on entry temperature of intake air. Based on corrected value and calculated pressure ratio, rotational frequency of compressor under standard environmental condition is read out in light of operating characteristic diagram for compressor. Read-out rotational frequency is corrected into actual rotational frequency of compressor through multiplication by corrective coefficient based on entry temperature of intake air, which is determined as rotational frequency of turbocharger 2.",
  "title": "TURBO ROTATIONAL FREQUENCY DETECTION DEVICE"
}