{
  "$type": "site.standard.document",
  "description": "A road surface condition judging apparatus (40) of a vehicle includes means (2,3,4,5) for detecting wheel speeds of respective wheels, means (8) for calculating a vehicle speed (Vb) of the vehicle based on the wheel speeds, means (9) for calculating a deceleration of the vehicle (Gx), slip ratio…",
  "path": "/patents/1079587",
  "publishedAt": "2005-03-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C23/061",
    "FUJI HEAVY IND LTD [JP]"
  ],
  "textContent": "A road surface condition judging apparatus (40) of a vehicle includes means (2,3,4,5) for detecting wheel speeds of respective wheels, means (8) for calculating a vehicle speed (Vb) of the vehicle based on the wheel speeds, means (9) for calculating a deceleration of the vehicle (Gx), slip ratio difference calculating means (8) for calculating a difference of slip ratios between front wheels and rear wheels (Sfr) based on the wheel speeds of the respective wheels and the vehicle speed (Vb), tire judgment value establishing means (13) for variably establishing a tire judgment value (Cvari), tire type judging means (14) for judging a tire type of the wheels based on the tire judgment value, grip threshold value establishing means (16) for variably establishing a grip threshold value (Gth1,Gth2) in accordance with the tire type and road surface judging means (17) for judging a road surface condition based on a comparison of the difference of slip ratios with the grip threshold value.",
  "title": "Apparatus and method of judging tire type and road surface conditions for vehicle"
}