KR101923735B1 - Work mode control device for construction equipment - Google Patents

Abstract

The present invention relates to an operation mode control apparatus of a construction machine.
Operation mode control apparatus for a construction machine according to the present invention, the detection unit unit for detecting the weight of the load and sending a weight value; An ECU (Electronic control unit) for controlling the engine to output power of the engine set in the selected work mode among the plurality of work modes; And a vehicle control unit (VCU) for controlling the hydraulic pump and controlling the ECU in response to the selected working mode.
In the VCU, when the weight value detected from the detector unit 10 exceeds a preset weight value, and the selected work mode is a higher level work mode requiring the output of the engine and the output of the hydraulic pump to be increased, The ECU 30 and the hydraulic pump are controlled to drive the hydraulic pump and the engine in a lower level working mode, and when the weight value is reduced, the control unit returns to the previously set working mode.

Description

Work mode control device for construction equipment

The present invention relates to a work mode control device for a construction machine, and more particularly, to a work mode control device according to the weight of the load to lower the work mode to a lower level when the weight of the load is higher than the set weight to ensure safe operation. It is about.

In general, before starting the operation of construction equipment, the working mode is selected in anticipation of the workload, and then the output of the engine and the hydraulic pressure of the hydraulic pump are set by experience.

The workload may vary depending on the conditions of the job, for example excavation, leveling, lifting, conveying, dumping. In addition, the workload may vary depending on whether the surrounding environment of the construction machine is flat, slopes, water in the mud. In addition, the workload may vary depending on whether you are working at a rapid pace or at a normal speed.

On the other hand, the working mode provided by the manufacturer of the construction machine, for example, the power plus mode (P +), power mode (P), standard mode (S), eco mode (E), the order of sorting such work modes It is divided according to the workload. Each mode of operation can determine the performance range of the engine and hydraulic pump.

Higher loads or faster work are required, and higher levels are preferred.

On the other hand, the weight of the workpiece may vary at all depending on the specific gravity of the object, even if the work object appears to be the same / similar volume, it is difficult to weigh the weight of the load, especially when the work object is mixed with various materials.

In addition, since the working method of the construction machine is so diverse and variable as described above, it is difficult to predict the workload in advance and it may be difficult to select the most suitable working mode.

Therefore, the worker may habitually select a higher level, for example, the power plus mode P + or the power mode P.

However, when the weight of the load exceeds the set weight value in a state where the weight of the work object is not determined how much the risk of a safety accident requires attention.

Patent Document 1: Republic of Korea Patent Publication No. 10-2009-0068809, 2009.06.29 Patent document 1 describes a technique for measuring the weight of a work object loaded in a bucket although not directly related to the technique of the present invention.

Accordingly, an object of the present invention is to provide an operation mode control apparatus for a construction machine capable of preventing a safety accident and increasing the equipment life of a construction machine in response to the weight of a load.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, another technical problem that is not mentioned can be clearly understood by those skilled in the art from the following description. There will be.

Operation mode control apparatus for a construction machine according to the present invention for achieving the above technical problem,

A detector unit for detecting a weight of the load and sending a weight value;

An ECU controlling the engine to output power corresponding to a selected work mode among the plurality of work modes; And

And a VCU controlling the hydraulic pump and the ECU in response to the selected working mode.

The VCU,

When the weight value of the load detected from the detector unit is greater than a preset weight value, the ECU is configured to limit the output of the hydraulic pump and the engine to a size corresponding to a lower level work mode lower than the selected work mode. When the hydraulic pump is controlled and the weight value of the load is changed to be smaller than the preset weight value in a state in which outputs of the hydraulic pump and the engine are limited to a size corresponding to the lower level working mode, the engine and And controlling the ECU and the hydraulic pump to output the hydraulic pump up to a size corresponding to the selected work mode.

Operation mode control apparatus for a construction machine according to the present invention for achieving the technical problem is a detection unit unit for detecting the weight of the load and sending a weight value; A transmission control unit (TCU) for controlling a traveling speed of a construction machine in a high speed mode or a low speed mode; And when the high speed driving mode is selected in the TCU when the weight value is set based on the weight value from the detection unit, controlling to change to the low speed driving mode, and when the weight value is reduced, the previously set high speed driving mode. And a vehicle control unit (VCU) for controlling to return to the vehicle.

In addition, the operation mode control apparatus for a construction machine according to the present invention may be made of a controller area network (CAN) with the VCU and the ECU or the TCU. The working mode may be selected from a standard working standard mode and at least one higher level working mode higher than the standard mode, the working mode is selected as the at least one higher level working mode, and the weight value of the load When the weight is greater than the preset weight value, the VCU controls the ECU and the hydraulic pump to output power of the engine and the hydraulic pump only to a size corresponding to the standard mode.

Specific details of other embodiments are included in the detailed description and the drawings.

The operation mode control apparatus of the construction machine according to the present invention made as described above can recognize the weight of the loaded load of the bucket, can determine whether the current weight reaches the dangerous level or the appropriate weight, thereby overloading Safe operation can be induced by making it avoidable.

In addition, the operation mode control apparatus for a construction machine according to the present invention, when the weight of the load exceeds the set weight value, the operator lowers the work mode from the upper level to the lower level and if the weight of the load is reduced below the set weight value Returning to the selected higher level can improve safety and workability.

In addition, the operation mode control apparatus for a construction machine according to the present invention, when the weight of the load exceeds the set weight value, and controls the shift control unit to run at a low speed, if the weight of the load is reduced below the set weight value By allowing the operator to return to the selected driving speed, safety and workability can be improved.

1 is a view for explaining the operation mode control apparatus of a construction machine according to an embodiment of the present invention.
2 is a view for explaining the correlation between the weight and the working mode in the work mode control apparatus for a construction machine according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

Like reference numerals refer to like elements throughout.

Meanwhile, terms to be described below are terms set in consideration of functions in the present invention, which may vary depending on the intention or custom of the producer, and the definitions thereof should be made based on the contents throughout the present specification.

Meanwhile, terms used in the present specification are defined as follows.

VCU: Vehicle control unit-Vehicle control unit

ECU: Electronic control unit

TCU: Transmission Control Unit-Variable Speed Electronic Control Unit

CAN: Controller Area Network-Instrument Controller Network

Hereinafter, an operation mode control apparatus for a construction machine according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

1 is a view for explaining the operation mode control apparatus of a construction machine according to an embodiment of the present invention, the accompanying drawings Figure 2 is a weight and weight in the operation mode control apparatus of a construction machine according to an embodiment of the present invention It is a figure for demonstrating the correlation of a work mode.

As shown in FIG. 1, the operation mode control apparatus for a construction machine according to an embodiment of the present invention includes information provided from a detector unit 10 and a detector unit 10 for detecting a weight of a load and sending a detection value. It is configured to include a VCU 20 for controlling the ECU 30 based on. In addition, the above-described VCU 20 may control the TCU (30). The VCU 20 can also control the output of the hydraulic pump 22.

Meanwhile, the VCU 20 and the TCU 40 may exchange signals with the VCU 20 using CAN communication.

The detector unit 10 may be a load cell sensor provided in the bucket. In addition, the detector unit 10 may be a boom cylinder press sensor.

That is, the weight applied to the bucket can be estimated by measuring the weight applied to the bucket directly or the pressure applied to the boom cylinder.

The VCU 20 is a vehicle electronic control apparatus for controlling a construction machine. The VCU 20 sets an allowable weight value and calculates the calculation based on the information provided from the above-described detector unit 10. The ECU 30, the TCU 40, and the hydraulic pump 22 are controlled in response to the above calculation result.

The ECU 30 is a device for controlling the fuel injection amount of the engine and the like. When the operator selects a work mode, the engine is controlled by the VCU 20 to output an engine output suitable for the work mode. The work mode may be provided in a power level mode (P +), a power mode (P), a standard mode (S), and an eco mode (E) in the order of the upper level to the lower level. The countermeasure standard mode (S) is a standard operation, and higher levels than the standard mode (S) are the power plus mode (P +) and the power mode (P). The higher the level goes, the higher the engine output and the output of the hydraulic pump 22 are.

The TCU 40 is a device that controls the traveling speed when the construction machine travels. Following the driver selection or the automatic control of the VCU 20, one of a plurality of driving modes such as a high speed driving mode and a low speed driving mode is selected to enable the vehicle to run. In one embodiment of the present invention, if the high-speed driving in the state of overloading, there is a risk of a safety accident such as a rollover accident, so that the vehicle is controlled to run at an appropriate speed.

When the weight value provided from the detection unit unit 10 is higher than the set weight value, the VCU 20 forcibly lowers the low speed driving mode even if the driving speed mode set in the TCU 40 is the high speed mode.

As a result, the running speed of the construction machine is slowed down than in the high speed driving mode to ensure the safe running of the construction machine, and also to prevent abnormal stress from being applied to various components of the construction machine to extend the life of the equipment. do.

Thereafter, when a change in the weight of the load occurs and the weight value provided from the detector unit 10 becomes lower than the set weight value, the VCU 20 controls the TCU 40 to return to the high speed driving mode set by the operator. .

As a result, the construction machine can be moved quickly, and workability of the construction machine is improved.

The operation of the above-described VCU 20 will be described in more detail with reference to FIG. 2.

When the weight value provided from the detection unit unit 10 is higher than the set weight value, the VCU 20 forcibly lowers it to the standard mode S even if the work mode set by the ECU 30 is at a higher level.

As a result, the power output from the engine and the hydraulic pump 22 is lower than that at the upper level. On the other hand, it is possible to prevent the safety accident overturning the construction machinery, it is also possible to prevent the overload is applied to the various components of the construction machinery to extend the life of the equipment.

Then, when a change occurs in the weight of the load and the weight value provided from the detector unit 10 becomes lower than the set weight value, the VCU 20 controls the ECU 30 to return to the higher level set by the operator.

As a result, by returning to a higher level, the magnitude of power output from the engine and the hydraulic pump 22 is increased, thereby improving the workability of the construction machine.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. will be.

Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims, and from the meaning and scope of the claims and their equivalent concepts. All changes or modifications which come out should be construed as being included in the scope of the present invention.

The operation mode control device of the construction machine according to the present invention can be used to control to improve the stability and workability when the load on the construction machine is overloaded.

10: detector unit
20: Vehicle control unit (VCU)
22: hydraulic pump
30: Electronic control unit (ECU)
40: Transmission Control Unit (TCU)
CAN: Controller Area Network

Claims (4)

A detector unit for detecting a weight of the load and sending a weight value;
An ECU controlling the engine to output power corresponding to a work mode selected by the user among a plurality of work modes; And
And a VCU controlling the hydraulic pump and the ECU in response to the selected working mode.
The VCU, when the weight value of the load detected from the detection unit unit is greater than the preset weight value to correspond to the selected work mode, the hydraulic pressure to the size corresponding to a lower level work mode than the selected work mode Control the ECU and the hydraulic pump so that the output of the pump and the engine is limited,
When the weight value of the load is changed to be smaller than the preset weight value in a state in which outputs of the hydraulic pump and the engine are limited to a size corresponding to the lower level working mode, the engine and the hydraulic pump are configured to perform the selected work. Control the ECU and the hydraulic pump to output the size corresponding to the mode,
The work mode may be selected from a standard mode for standard work and at least one higher level work mode that is higher than the standard mode.
When the work mode is selected as the at least one higher level work mode, and the weight value of the load is greater than a preset weight value, the VCU is configured to increase the power of the engine and the hydraulic pump only to a size corresponding to the standard mode. Controlling the ECU and the hydraulic pump to output A work mode control device for a construction machine.

The method of claim 1,
Controlled by the VCU, TCU (Transmission Control Unit-transmission electronic control device) for controlling the traveling speed of the construction machine in the high speed driving mode or the low speed driving mode corresponding to the selected driving mode of the plurality of driving modes; ,
The VCU,
When the weight value detected from the detector unit exceeds a preset weight value and the selected driving mode is a high speed traveling mode, the TCU is controlled to travel in a low speed traveling mode in which the traveling speed of the construction machine is limited at a low speed. And when the weight value is reduced, return to the high speed traveling mode and control the TCU to allow the construction machine to travel at high speed.
The method of claim 2,
The VCU is a work mode control device for a construction machine, characterized in that the ECU or the TCU and the controller area network (CAN).
A detector unit for detecting a weight of the load and sending a weight value;
An ECU controlling the engine to output power corresponding to a work mode selected by the user among a plurality of work modes;
A VCU controlling the hydraulic pump and the ECU in response to the selected working mode; And
Controlled by the VCU, and includes a TCU (Transmission Control Unit-transmission electronic control device) for controlling the traveling speed of the construction machine in the high speed driving mode or the low speed driving mode corresponding to the selected driving mode of the plurality of driving modes,
The VCU, when the weight value of the load detected from the detection unit unit is greater than the preset weight value to correspond to the selected work mode, the hydraulic pressure to the size corresponding to a lower level work mode than the selected work mode The ECU and the hydraulic pump are controlled to limit the output of the pump and the engine, and the weight value of the load is set in a state in which the output of the hydraulic pump and the engine is limited to a size corresponding to the lower level working mode. When the change is made smaller than the set weight value, and controls the ECU and the hydraulic pump so that the engine and the hydraulic pump can be output to a size corresponding to the selected working mode,
The VCU is configured to travel in a low speed traveling mode in which the traveling speed of the construction machine is limited at a low speed when the weight value detected from the detector unit exceeds a preset weight value and the selected driving mode is a high speed traveling mode. Controlling the TCU, and when the weight value is reduced, returns to the high speed traveling mode to control the TCU to allow the construction machine to travel at high speed;
The VCU is a work mode control device for a construction machine, characterized in that the ECU or the TCU and the controller area network (CAN).

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