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Wheel rotor and method for controlling wheel rotor

A wheel loader and traction control technology, applied in the direction of transmission control, control device, earth mover/shovel, etc. The effect of reducing and preventing excessive growth

Active Publication Date: 2014-09-24
KOMATSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such operations are cumbersome for the operator and cause the operability of the wheel loader to decrease.

Method used

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  • Wheel rotor and method for controlling wheel rotor
  • Wheel rotor and method for controlling wheel rotor
  • Wheel rotor and method for controlling wheel rotor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062] A wheel loader 50 according to one embodiment of the present invention will be described with reference to the drawings. figure 1 is a side view of the wheel loader 50 . The wheel loader 50 has a vehicle body 51 , a work implement 52 , a plurality of wheels 55 , and a cab 56 . The work implement 52 is attached to the front of the vehicle body 51 . Work implement 52 has boom 53 , bucket 54 , lift cylinder 19 , and bucket cylinder 26 . The boom 53 is a member for lifting the bucket 54 . The boom 53 is driven by the lifting hydraulic cylinder 19 . Bucket 54 is attached to the tip of boom 53 . Bucket 54 is dumped and tilted by bucket cylinder 26 . The cab 56 is mounted on the vehicle body 51 .

[0063] figure 2 It is a block diagram showing the configuration of the hydraulic drive mechanism 30 mounted on the wheel loader 50 . The hydraulic drive mechanism 30 mainly includes an engine 1 , a first hydraulic pump 4 , a second hydraulic pump 2 , a charge pump 3 , a tra...

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PUM

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Abstract

The present invention relates to a wheel loader and a control method of the wheel loader. The traction control unit of the wheel loader is such that when the traction control is in an open state, the maximum traction force is equal to the maximum traction force when the traction control is in an off state. than lowered. When the determination condition is satisfied while the traction control is in the on state, the traction control unit increases the maximum traction force. The determination conditions include that the work content is excavation, the operation amount of the accelerator operating member is more than a predetermined operation threshold, and the boom angle is more than a predetermined angle threshold.

Description

technical field [0001] The invention relates to a wheel loader and a control method for the wheel loader. Background technique [0002] A so-called HST (Hydro Static Transmission) may be mounted on a wheel loader. In the HST type wheel loader, the engine drives the hydraulic pump, and the hydraulic motor for travel is driven by the working oil discharged from the hydraulic pump. Thus, the wheel loader travels. In such an HST-type wheel loader, the vehicle speed and tractive force can be controlled by controlling the engine speed, the capacity of the hydraulic pump, the capacity of the traveling hydraulic motor, and the like (see Patent Document 1). [0003] In the above-described wheel loader, the operator can select to perform traction control. In traction force control, for example, the capacity of the hydraulic motor for travel is limited to an upper limit capacity smaller than the maximum capacity. As a result, the maximum tractive force is reduced. When slipping or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/42E02F9/22
CPCF16H61/421E02F9/2253F16H61/472E02F9/2289B60W30/18172E02F9/2292B60W2540/10B60W2710/105B60W2510/305E02F9/2296
Inventor 白尾敦
Owner KOMATSU LTD