Industrial vehicle

{
  "publication_number": "US9261035B2",
  "country": "US",
  "kind": "B2",
  "title": "Industrial vehicle",
  "abstract": "An industrial vehicle has an engine, a drive wheel, and a power transmission mechanism that transmits power of the engine to the drive wheel wherein the power transmitted through the power transmission mechanism causes creeping of the vehicle. The industrial vehicle includes a control unit that controls an engine speed of the engine and a vehicle speed detection unit that detects a vehicle speed of the vehicle. The control unit controls the engine speed at a first engine speed when the vehicle is in a non-traveling state, and when the vehicle speed has exceeded a predetermined vehicle speed, the control unit controls the engine speed at a second engine speed that is lower than the first engine speed, and the second engine speed is set to generate a desired creeping speed.",
  "claims": [
    "1. An industrial vehicle including an engine, a drive wheel, and a power transmission mechanism that transmits power of the engine to the drive wheel wherein the power transmitted through the power transmission mechanism causes creeping of the vehicle, the industrial vehicle comprising: a control unit that controls an engine speed of the engine; and a vehicle speed detection unit that detects a vehicle speed of the vehicle, wherein the control unit controls the engine speed at a first engine speed when the vehicle is in a non-traveling state, and when the vehicle speed has exceeded a predetermined vehicle speed due to a transition to a state of power transmission in which the power of the engine is transmitted to the drive wheel, the control unit controls the engine speed at a second engine speed that is lower than the first engine speed, and the second engine speed is set to generate a desired creeping speed.",
    "2. The industrial vehicle according to claim 1, wherein when a state in which the vehicle speed is zero has continued for a predetermined period of time, the control unit controls the engine speed at the first engine speed.",
    "3. The industrial vehicle according to claim 1, wherein when the engine speed is changed from the first engine speed to the second engine speed, the control unit changes the engine speed gradually.",
    "4. The industrial vehicle according to claim 1, further comprising an accelerator and an accelerator opening detection unit that detects an opening of the accelerator, wherein the control unit controls the engine speed according to the opening of the accelerator."
  ],
  "description_excerpt": "The present invention relates to an industrial vehicle in which the power of an engine is transmitted to drive wheels through a power transmission mechanism and in which creeping of the vehicle occurs.\n\nThere has been a vehicle which is provided with a power transmission mechanism that transmits the power of an engine. In the vehicle, the power transmitted through the power transmission mechanism causes creeping of the vehicle (see Japanese Unexamined Patent Application Publication No. 2001-323826). Such creeping is useful for starting a vehicle smoothly.\n\nAn industrial vehicle such as a forklift truck may have an engine mounted immediately below the driver's seat due to the limited size of the vehicle. In such vehicle, the driver's seat is subjected to the vibration of the engine. Therefore, there has been a demand for controlling the engine vibration. Furthermore, the engine of the forklift truck that may be used for loading operations near a rack or the like is required to operate with stability during the loading operations with the forklift truck being at a stop. The idling speed of the forklift truck may be set relatively high for the purpose of suppression of the vibration and stabilized operation of the engine of the forklift truck.\n\nThe creeping occurs also in an industrial vehicle, such as a forklift truck, if the power transmission mechanism of the engine of the vehicle includes a torque converter and an automatic transmission.",
  "cpc": [
    "F02D 41/08",
    "B60K 2031/0091",
    "B60K 31/00",
    "B60W 10/06",
    "B60W 2030/206",
    "B60W 2300/121",
    "B60W 2520/10",
    "B60W 2710/0644",
    "B60W 2710/065",
    "B60W 30/18054",
    "B60W 30/18063",
    "B60Y 2200/15",
    "B66F 9/07572",
    "B66F 9/20",
    "B66F 9/22",
    "F02D 2200/501",
    "F02D 29/02",
    "F02D 31/001",
    "F02D 41/0225"
  ],
  "ipc": [
    "B60K 31/00",
    "B66F 9/075",
    "F02D 29/02",
    "F02D 41/08"
  ],
  "assignees": [
    "Toyota Industries Corp"
  ],
  "inventors": [
    "Yukikazu Koide",
    "Norihiko Kato"
  ],
  "filing_date": "2015-03-25",
  "publication_date": "2016-02-16",
  "grant_date": "2016-02-16",
  "priority_date": "2014-03-26",
  "application_number": "US-201514667776-A",
  "family_id": "52987880",
  "cited_by_count": 0,
  "citations": [
    "US4885960A",
    "JP2001323826A",
    "US20070010927A1",
    "US20080154472A1",
    "US20110320067A1",
    "US8321113B2",
    "US8919314B2"
  ]
}