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Working vehicle, control device for working vehicle, and control method for working vehicle

A technology for operating vehicles and operating devices, which is applied to control devices, vehicle parts, motor vehicles, etc., can solve problems such as power consumption, and achieve the effect of improving operating efficiency

Inactive Publication Date: 2013-06-19
KOMATSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even in a work vehicle equipped with such a special brake pedal, in order to transfer power to the work equipment side, the special brake pedal is operated when the clutch is operated, so there is a disadvantage that power is consumed by braking.

Method used

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  • Working vehicle, control device for working vehicle, and control method for working vehicle
  • Working vehicle, control device for working vehicle, and control method for working vehicle
  • Working vehicle, control device for working vehicle, and control method for working vehicle

Examples

Experimental program
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Effect test

no. 1 example

[0058] A case where an embodiment of the present invention is applied to a wheel loader as a work vehicle will be described below with an example. In addition, this embodiment can also be applied to other work vehicles other than the wheel loader.

[0059] figure 1 It is an explanatory diagram schematically showing the overall structure of the wheel loader. The wheel loader is roughly divided into a mechanical structure 100 and a control structure (hereinafter referred to as a control device) 200 . First, the mechanical structure 100 will be described, and then the control device 200 will be described.

[0060] The mechanical structure 100 has, for example: an engine 101; an output distributor (PTO: power take-off) 102 for distributing the output of the engine 101 to a traveling system 103 and a hydraulic system 104; a traveling system 103 for driving the wheel loader; The hydraulic device system 104 is mainly used to drive the work implement 5 .

[0061] Here, refer to ...

no. 2 example

[0107] Hereinafter, differences from the first embodiment will be mainly described, and common points with the first embodiment will be omitted or briefly described.

[0108] In the second embodiment of the present invention, when it is detected that the loading operation is in progress, the oil quantity increase control is performed instead of or based on the selection of the maximum output characteristic of the P mode. . Hereinafter, the present embodiment will be described in detail by taking the case where the P mode maximum output characteristic selection and the oil quantity increase control are performed together as an example when it is detected that the loading operation is in progress.

[0109] Figure 9 It is an explanatory diagram focusing on the functions of the control device 1200 according to the second embodiment of the present invention.

[0110]The output control unit 2212 has an oil amount increase output control unit 212 that increases the amount of hydra...

no. 3 example

[0128] Hereinafter, a modified example of the processing for detecting loading work will be described. That is, a modified example of the loading operation detection unit 211 . The third to tenth embodiments correspond to modified examples of the first and second embodiments.

[0129] like Figure 13 As shown, in the third embodiment, the loading operation detecting unit 211 respectively determines whether the boom joystick 126 is operated in the upward direction (S10), and whether the boom angle θb is greater than a predetermined value θ1 (S11). If both are true, it is determined that the loading operation is in progress (S14).

[0130] The present embodiment configured as described above can also exhibit the same effects as those of the first and second embodiments described above. In this embodiment, since the process of detecting the loading operation is simpler than that of the first embodiment and the second embodiment, the control program can be simplified compared w...

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PUM

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Abstract

An object of the present invention is to improve working efficiency of a working vehicle. A working vehicle (1) in which an output from an engine (101) is distributed to a traveling system (103) and a hydraulic device system (104) includes a loading operation detection unit (211) that detects whether a loading operation using a work equipment (51) is being performed, a clutch (110) contained in the traveling system (103) and connected to a distributor (102), a maximum output characteristic control unit (2203) that selects a second engine maximum output characteristic from among first and second maximum output characteristics when it is detected that the loading operation is being performed, and a hydraulic oil amount control unit (212) that decreases a clutch pressure of the clutch (110) when it is detected that the loading operation is being performed. In the first engine maximum output characteristic, a maximum output torque in a predetermined engine revolution speed range is lower than that in the second engine maximum output characteristic.

Description

technical field [0001] The present invention relates to a work vehicle, a control device for the work vehicle, and a control method for the work vehicle. Background technique [0002] For example, in a wheel loader as a work vehicle, engine output is used as power for work and power for travel. In the wheel loader, a load such as sand and soil is scooped up by the bucket of the work equipment, the bucket is lifted by the boom, and loaded into the bed of a truck or the like. Working efficiency can be improved by rapidly raising the bucket fully loaded with loads. [0003] Therefore, in the prior art, during loading work, the operator simultaneously operates the brake pedal and the accelerator pedal. As a result, the rotational speed of the hydraulic pump is increased while traveling at a low speed, thereby increasing the amount of hydraulic oil supplied to the working device (Patent Document 1). In addition, there is also known a technique of controlling the degree of enga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/20B60W10/02B60W10/04E02F9/22
CPCE02F9/2235B60W2540/10E02F9/2025B60W2520/10B60W2540/12B60Y2200/415B60W2710/0644B60W2510/0638B60W10/08B60W2540/16E02F9/2083
Inventor 斋藤芳明
Owner KOMATSU LTD