Work vehicle and method of controlling work vehicle

• US 10,480,160 B2
• Filed: 11/09/2016
• Issued: 11/19/2019
• Est. Priority Date: 11/09/2016
• Status: Active Grant

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Tanishige, Akira, Kami, Yoshiki, Yokoo, Takashi, Fujii, Yuto, Nishiguchi, Haruki
• Primary Examiner(s): Casillashernandez, Omar
• Application Number:
  US15/540,077
• Publication Number:
  US 20180266082A1
• Time in Patent Office: 1,105 Days
• Field of Search: 340438
• CPC Class Codes: E02F 3/307 the boom and the dipper-arm being connected so as to permit relative movement in more than one plane
• CPC Class Codes: E02F 3/3677 allowing movement, e.g. rotation or translation, of the tool around or along another axis as the movement implied by the boom or arms, e.g. for tilting buckets
• CPC Class Codes: E02F 3/434 providing automatic sequences of movements, e.g. automatic dumping or loading, automatic return-to-dig
• CPC Class Codes: E02F 9/2228 including an electronic controller
• CPC Class Codes: E02F 9/2271 Actuators and supports therefor and protection therefor
• CPC Class Codes: E02F 9/2285 Pilot-operated systems
• CPC Class Codes: E02F 9/2296 Systems with a variable displacement pump
• CPC Class Codes: E02F 9/264 Sensors and their calibration for indicating the position of the work tool
• CPC Class Codes: E02F 9/267 Diagnosing or detecting failure of vehicles

Abstract

A main controller controlling an operation of a work vehicle includes a determination unit and an abnormal condition determination unit. The determination unit determines whether or not an attachment has a sensor based on information on an attachment. When the determination unit determines that the attachment has the sensor and when the abnormal condition determination unit cannot receive a signal from the sensor, the abnormal condition determination unit determines that an abnormal condition has occurred.

Claims

1. A work vehicle comprising:

a vehicular main body;

a work implement attached to the vehicular main body, the work implement having a removable attachment; and

a controller controlling an operation of the work vehicle, the controller including a determination unit determining whether the attachment has a sensor based on information on the attachment stored in a storage unit, the information on the attachment including information on whether or not the attachment has the sensor, the controller further including an abnormal condition determination unit determining that an abnormal condition has occurred when the determination unit determines that the attachment has the sensor and when the abnormal condition determination unit cannot receive a signal from the sensor.

2. The work vehicle according to claim 1, wherein

the information on the attachment includes information on a shape of the attachment.

3. The work vehicle according to claim 1, wherein

the information on the attachment includes information on the attachment having the sensor and information on the attachment without the sensor.

4. The work vehicle according to claim 1, wherein

the attachment is a bucket.

5. The work vehicle according to claim 4, wherein

the work implement has a boom attached to the vehicular main body as being pivotable with respect to the vehicular main body and an arm attached to the boom as being pivotable with respect to the boom, and

the bucket is attached to the arm as being pivotable around a bucket axis defining an axis of pivot with respect to the arm and around a tilt axis orthogonal to the bucket axis.

6. The work vehicle according to claim 1, the work vehicle further comprising a notification unit giving a notification about an abnormal condition when the abnormal condition determination unit determines that an abnormal condition has occurred.

7. A method of controlling a work vehicle, the work vehicle including a vehicular main body and a work implement attached to the vehicular main body, the work implement having a removable attachment, the method comprising:

determining whether the attachment has a sensor based on information on the attachment stored in a storage unit, the information on the attachment including information on whether or not the attachment has the sensor; and

determining that an abnormal condition has occurred when it is determined that the attachment has the sensor and when a signal from the sensor cannot be received.