{
  "$type": "site.standard.document",
  "description": "In a hydraulic variable valve timing mechanism comprising a lock pin that locks a vane rotor and a housing against relative rotation in the most retarding phase, a specified angle ± is set so that release of the lock pin is started at a time when positive cam torque acts on the vane rotor. When the…",
  "path": "/patents/1000464",
  "publishedAt": "2012-07-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01L1/34",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "In a hydraulic variable valve timing mechanism comprising a lock pin that locks a vane rotor and a housing against relative rotation in the most retarding phase, a specified angle ± is set so that release of the lock pin is started at a time when positive cam torque acts on the vane rotor. When the crank angle reaches the specified angle ± 1 supply of hydraulic pressure to the advancing oil chamber is started to release the lock pin from the engagement with the lock hole, thereby enabling a reliable release of the lock pin prior to start of change of valve timing.",
  "title": "CONTROL DEVICE FOR HYDRAULIC VARIABLE VALVE TIMING MECHANISM"
}