Work vehicle and method of controlling work vehicle

Inactive Publication Date: 2019-11-07
KOMATSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0011]According to the present disclosure, a work vehicle capable of obtaining desired working capability whil

Problems solved by technology

Therefore, the tires serve as a spring system and vibration

Method used

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  • Work vehicle and method of controlling work vehicle
  • Work vehicle and method of controlling work vehicle
  • Work vehicle and method of controlling work vehicle

Examples

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Example

[0063]Since the construction of Comparative Example 1 is otherwise substantially the same as the construction shown in FIG. 2, elements identical to those in the construction shown in FIG. 2 have the same reference characters allotted and description thereof will not be repeated.

[0064]In Comparative Example 1 shown in FIG. 3, in the shock absorption mode, first switch valve 71a is opened and second switch valve 71b is closed so that accumulator 72a can be connected to the cap-side circuit of lift cylinder 44. Alternatively, in the vibration suppression mode, first switch valve 71a is closed and second switch valve 71b is opened so that accumulator 72a can be connected to the head-side circuit of lift cylinder 44.

[0065]In Comparative Example 1, one accumulator 72a is shared between the shock absorption mode and the vibration suppression mode. Therefore, when a capacity required in the vibration suppression mode is higher than a capacity required in the shock absorption mode, accumula...

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Abstract

A first switch valve is connected to a cap-side circuit of a lift cylinder. A second switch valve is connected to a head-side circuit of the lift cylinder. A first accumulator is connected to the cap-side circuit of the lift cylinder with the first switch valve being interposed. A second accumulator is connected to the head-side circuit of the lift cylinder with the second switch valve being interposed. A third switch valve is connected between the first accumulator and the second accumulator.

Description

TECHNICAL FIELD[0001]The present invention relates to a work vehicle and a method of controlling a work vehicle.BACKGROUND ART[0002]A motor grader does not have a suspension function in its undercarriage in order to ensure working performance in such works as land-grading works, road cutting works, and excavation works. In addition, the motor grader includes hollow tires. Therefore, the tires serve as a spring system and vibration occurs in a vehicular body around a specific vehicle speed. When the vehicular body vibrates, a vehicle speed should be lowered in order to avoid vibration during travel.[0003]For example, Japanese Utility Model Laying-Open No. 2-132754 discloses a technique for suppressing vibration. A motor grader in this literature includes a blade lift cylinder connected to a work implement, a switch valve connected to a cap side of the blade lift cylinder, a switch valve connected to a head side of the blade lift cylinder, and an accumulator connected to the two switc...

Claims

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Application Information

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IPC IPC(8): E02F9/22E02F3/815
CPCE02F9/2267E02F9/2285E02F9/2228E02F3/815E02F3/7636E02F3/844E02F9/2217
Inventor HARADA, MUNEOONO, YUTAKA
Owner KOMATSU LTD
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