KR101625682B1

KR101625682B1 - Fuel consumption rate display apparatus, fuel consumption rate display method and standard fuel rate calculation method for construction machinery

Info

Publication number: KR101625682B1
Application number: KR1020090130420A
Authority: KR
Inventors: 윤홍철
Original assignee: 두산인프라코어 주식회사
Priority date: 2009-12-24
Filing date: 2009-12-24
Publication date: 2016-05-31
Also published as: KR20110073705A

Abstract

The fuel economy display device for a construction machine according to the present invention is applied to a construction machine that drives a working machine 40 by operating oil of a hydraulic pump 70 driven by an engine 31 and is used for displaying a standard fuel consumption and a current fuel consumption A display unit 10; And the standard fuel consumption is set in accordance with the operation state, and the standard fuel consumption is calculated from the current operation state and output to the display unit 10, and the engine control unit 30 for controlling the engine 31 And a control unit (20) for outputting the current fuel efficiency to the display unit (10).

Construction machinery, standard fuel consumption, current fuel consumption, work pattern improvement, fuel efficiency improvement

Description

TECHNICAL FIELD [0001] The present invention relates to a fuel consumption display device, a fuel consumption display method, and a standard fuel consumption calculation method of a construction machine. [0002] FUEL CONSUMPTION RATE DISPLAY APPARATUS, FUEL CONSUMPTION RATE DISPLAY METHOD AND STANDARD FUEL RATE CALCULATION METHOD FOR CONSTRUCTION MACHINERY [

The present invention relates to a construction machine such as an excavator or a wheel loader, and more particularly, to a construction machine which outputs an optimum standard fuel economy and a current fuel efficiency in a current operation state of a construction machine to a display unit so that an operator can grasp the efficiency of the present operation. A display device, a fuel consumption display method, and a standard fuel consumption calculation method.

Generally, a construction machine such as an excavator makes a great difference in fuel efficiency due to a working pattern such as an operator's operating habit. Especially, the construction machine not only does the work for a long time, but also the fuel consumption of the engine is large. Therefore, even if the same operation is carried out using the construction machine, the difference of the fuel consumption is great.

In this way, since the fuel consumption varies greatly depending on the operating habit of the construction machine, it is necessary to induce the operator to operate the construction machine with an efficient working pattern. However, since it is impossible to grasp the optimum fuel consumption amount in the present working state as well as the present fuel consumption amount, it is impossible to change the work pattern of the operator.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fuel efficiency display device and a fuel efficiency display method of a construction machine capable of easily grasping the efficiency of a current operation and improving the efficiency of a work pattern, have.

It is another object of the present invention to provide a standard fuel economy calculation method of a construction machine capable of calculating an accurate standard fuel economy for each operation state.

In order to accomplish the above object, the fuel economy display device for a construction machine according to the present invention is applied to a construction machine for driving a working machine (40) by operating oil of a hydraulic pump (70) driven by an engine (31) A display unit 10 for displaying a standard fuel consumption and a current fuel consumption; And the standard fuel consumption is set in accordance with the operation state, and the standard fuel consumption is calculated from the current operation state and output to the display unit 10, and the engine control unit 30 for controlling the engine 31 And a control unit (20) for outputting the current fuel efficiency to the display unit (10).

According to an embodiment of the present invention, the display unit 10 includes a first region 11 and a second region 12. The control unit 20 converts each of the standard fuel economy and the current fuel efficiency into a character or a numerical value To the first area 11 and the second area 12, respectively.

According to another embodiment of the present invention, the control unit 20 outputs the standard fuel consumption and the current fuel consumption to the display unit 10 as a graph with respect to time.

Meanwhile, the controller 20 calculates the ratio of the standard fuel consumption based on the standard fuel consumption to the actual fuel consumption based on the current fuel consumption and the current fuel consumption based on the standard fuel consumption during the set time, It is possible to output the ratio of the current fuel consumption amount to the display unit 10 as a percentage.

Here, the work state may be the magnitude of the operation signal output from the operation unit 21 for driving the work machine 40. [

The operation state may include an operation signal output from the operation unit 21 for driving the work machine 40, a posture of the work machine 40, and a load of a work machine load applied to the work machine 40 And the control unit 20 calculates the standard fuel economy based on the operation signal, the posture of the working machine 40, and the load load applied to the working machine 40.

The operation unit 40 may include a boom 41 and an arm 42 and a bucket 43. The control unit 20 may include a boom posture detection sensor for detecting the posture of the boom 41 51) for detecting an attitude of the arm (42), an arm position sensing sensor (52) for sensing a position of the arm (42), and a bucket position sensing sensor (53) 40) can be calculated.

The above-described object is achieved by a fuel consumption display method of a construction machine for driving a working machine 40 by operating oil of a hydraulic pump 70 driven by an engine 31, comprising the steps of: a) Calculating a standard fuel consumption corresponding to the state; b) receiving current fuel consumption from the engine control unit (30) for controlling the engine (31); And c) outputting the calculated standard fuel mileage and the received current fuel mileage to the display unit (10).

Here, the current working state of the working machine 40 in the step a) may include an operating signal of the operating part 21 for driving the working machine 40. [

In addition, the step a) includes: a1) receiving information on the posture of the boom 41, the arm 42 and the bucket 43; a2) receiving an operation signal for driving the boom (41), the arm (42), and the bucket (43) from the operation unit (21); a3) receiving a load load of the bucket 43; And a4) calculating a standard fuel consumption ratio corresponding to the information input from the steps a1) to a3).

The above-described object is achieved by a method of calculating a standard fuel consumption of a construction machine that drives a working machine 40 by operating oil of a hydraulic pump 70 driven by an engine 31, comprising the steps of: a) The method comprising: b) receiving a posture of the working machine 40; c) receiving a load load of the working machine 40; And d) calculating a standard fuel consumption ratio from the operation signal, the attitude of the working machine (40) and the load load of the working machine (40). .

Here, the step d) includes: d1) calculating a standard driving speed of the working machine 40 from a load load of the working machine 40, an attitude of the working machine 40, and the operation signal; And d2) calculating a standard fuel consumption ratio for driving the work machine 40 at the calculated standard drive speed.

According to the task solution means of the construction machine as described above, since the current fuel consumption is displayed on the display unit in real time together with the standard fuel consumption, the operator can easily grasp the efficiency of the current operation pattern, thereby enabling the operator to have a highly efficient operation pattern So that the fuel efficiency of the construction machine can be improved.

In addition, the standard fuel consumption and the current fuel consumption are displayed as characters or numbers in different areas of the display, so that the operator can easily grasp the standard fuel economy and the current fuel economy.

In addition, the standard fuel consumption and the current fuel consumption are displayed as a graph of the time, so that the efficiency of the present and the past work can be grasped so that the operator can judge the efficiency of the present work as well as the past work pattern.

In addition, by outputting the current fuel consumption amount based on the current fuel consumption to the standard fuel consumption amount by the standard fuel consumption for a predetermined period of time as a percentage, the operator can more easily judge the efficiency of the operation.

On the other hand, the standard fuel consumption can be easily calculated by setting the standard fuel consumption according to the magnitude of the operation signal of the operation unit and calculating the standard fuel consumption based on the size of the current operation signal.

Further, by setting a standard fuel consumption ratio as a parameter of an operation signal of the operation unit, a posture of the working machine, and a load of the working machine load applied to the working machine, and calculating the standard fuel consumption ratio from the current variable, do.

Hereinafter, a fuel efficiency display device, a fuel efficiency display method, and a standard fuel consumption calculation method of a construction machine according to an embodiment of the present invention will be described in detail.

1, a fuel efficiency display device for a construction machine according to an embodiment of the present invention is applied to a construction machine that drives a working machine 40 by operating oil discharged from a hydraulic pump 70 directly connected to an engine 31 And includes a display unit 10 for displaying a standard fuel consumption and a current fuel consumption, and a control unit 20 for calculating a standard fuel consumption and a current fuel consumption and outputting the result to the display unit 10. The swash plate angle adjusting unit 71 adjusts the swash plate angle according to the control signal output from the controller 20 by controlling the swash plate angle so that the swash plate angle adjusting unit 71 adjusts the swash plate angle. The swash plate angle of the hydraulic pump 70 is adjusted. The control unit 20 may calculate a discharge flow rate of the hydraulic pump 70 by a signal output from a swash plate angle sensing sensor (not shown) for sensing the swash plate angle of the hydraulic pump 70.

The display unit 10 may include an instrument panel in a cabin or a separate monitor. 2, the display unit 10 includes a first region 11 for displaying a standard fuel consumption rate, a second region 12 for outputting a current fuel consumption rate, a fuel consumption amount And a third area 13 for indicating as a percentage the ratio of fuel consumption by the current fuel economy to the current fuel economy. Also, as shown in FIG. 3, the display unit 10 may display the standard fuel consumption and the variation amount of the current fuel consumption in a graphical form with respect to time.

The control unit 20 outputs the current fuel efficiency transferred from the engine control unit 30 to the display unit 10 and also calculates the standard fuel efficiency according to the current operation state and outputs the standard fuel efficiency to the display unit 10. [

The engine control unit 30 is generally called an electronic control unit (ECU) and outputs various control signals such as a fuel injection amount to the engine 31. [ Therefore, the engine control unit 30 can output information on the fuel injection amount of the present engine 31 to the control unit 20 in real time.

On the other hand, the control unit 20 calculates the standard fuel consumption from the current working state. Here, the standard fuel economy means an optimum fuel consumption rate supplied to the engine 31, and thus has a great dependence on the load applied to the engine 31 by the hydraulic pump 70. Thus, the standard fuel economy is determined by the variables of the load applied to the engine 31, and these variables are defined as the current working conditions.

For example, the current operation state can be set to the size of the operation signal input from the operation unit 21 as the simplest, and the standard fuel consumption can be calculated from the size of the operation signal. This is because the discharge flow rate of the hydraulic pump 70 becomes larger when the operation signal of the operation unit 21 is large and the discharge flow rate is proportional to the load applied to the engine 31. [ The calculation of the standard fuel consumption according to the magnitude of the operation signal of the operating portion 21 can be determined by various tests and the standard fuel consumption for the determined operation signal can be stored in the memory 60 in the form of a table as shown in Fig. have.

In this way, when the current operation state is determined by the operation signal, the control unit 20 calculates the standard fuel consumption corresponding to the input operation signal from the table as shown in FIG. 4 when the operation signal is inputted from the operation unit 21 And outputs it to the display unit 10. The current fuel consumption is calculated as the current fuel consumption per unit time transmitted from the engine control unit 30 in real time to various variables such as the target rotational speed of the engine 31 and the horsepower control of the hydraulic pump 70, Lt; / RTI > Therefore, when there is a large difference between the standard fuel consumption and the current fuel consumption, the operator adjusts the dial gauge or the like to reduce the target rotational speed of the engine 31 or operates the hydraulic pump 70 operating in the step- To the standard mode, and the like, so that the present fuel economy can be improved.

On the other hand, the standard fuel consumption can be set according to the magnitude of the operation signal, the operating direction, the posture of the working machine 40, and the load load placed on the working machine 40, as shown in Fig. That is, the current working state is determined by the size of the operating signal, the operating direction, the posture of the working machine 40, and the load load placed on the working machine 40. Therefore, the standard fuel consumption optimum for the variables can be calculated by a test or the like and stored in the memory 60 in the form of a table as shown in FIG. At this time, before the standard fuel economy is calculated, the standard fuel economy may be calculated after the working machine 40 calculates the standard driving speed first. The standard driving speed and the driving speed at which the fuel consumption is optimal can be determined by the test, and the standard driving speed can be calculated in consideration of the working speed.

More specifically, the size of the operation signal means the operation amount of the operation unit 21 and determines the drive speed of the work machine 40. The operation direction is a direction in which the operation unit 21 is operated, Direction. The discharge flow rate of the hydraulic pump 70 is changed as the hydraulic pump 70 is operated in the horsepower control mode of the hydraulic pump 70, that is, the boost mode and the standard mode, The load to be applied to the engine 31 is changed, thereby changing the fuel efficiency. Therefore, the optimum standard fuel economy corresponding to the magnitude of the operation signal may be different from the current fuel economy, and the standard fuel economy may vary depending on the size of the operation signal, the posture of the working machine 40, And is calculated.

The working machine 40 may include a boom 41, an arm 42 and a bucket 43. The attitude of the working machine 40 may be detected by a boom position detection sensor 51, an arm position detection sensor 52, Is calculated from the signal output from the bucket posture detecting sensor 53. The attitude of the working machine 40 is specified by the angle of the boom 41, the arm 42 and the bucket 43 when the respective attitude detecting sensors 51, 52 and 53 are angle sensors. Since the posture of the working machine 40 affects the load pressure and the required flow rate of each actuator, the load applied to the engine 31 is affected. In addition, the posture of the working machine 40 is related to the magnitude of the manipulation signal and the manipulated variable, so that the flow rate and the pressure to be supplied to the working machine 40 are determined. For example, a case in which the boom 41 is lifted in a state in which the arm 42 is unfolded requires more power than when the boom 41 is lifted in a state in which the arm 42 is folded, The load to be applied to the load 31 increases. Accordingly, the standard fuel consumption should also be changed depending on the posture of the working machine 40.

On the other hand, the load load placed on the working machine 40 mainly refers to the load load placed on the bucket 43. In this way, the power for driving the working machine 40 varies depending on the load load placed on the working machine 40, and the standard fuel consumption should be calculated differently. For example, when the load placed on the working machine 40 is large, a large power is required to drive the working machine 40, so that the standard fuel consumption is increased. The load load placed on the working machine 40 can be detected not only from the load pressures of the actuators of the respective working machines 40 but also by a load cell or the like for sensing the load of each of the working machines 40. [

Hereinafter, a fuel consumption display method of the fuel efficiency display device of the construction machine having the above-described configuration will be described in detail.

First, when an operation signal is input from the operation unit 21, the control unit 20 calculates a standard fuel consumption ratio corresponding to the magnitude of the input operation signal from the table shown in Fig. Then, the control unit 20 receives the current fuel efficiency from the engine control unit 30, and outputs the calculated standard fuel economy and the transmitted current fuel economy to the display unit 10. [ At this time, the current operation state of the working machine 40 is determined by the operation signal input from the operation unit 21. [

On the other hand, the control unit 20 calculates the standard fuel consumption amount for a predetermined time by integrating the standard fuel consumption for a predetermined time period according to the set time or the signal input from the operator, and integrates the current fuel consumption for a predetermined time And calculates the current fuel consumption for a predetermined time. Then, the ratio of the current fuel consumption amount to the calculated standard fuel consumption amount is output to the display unit 10 as a percentage.

Thus, when the ratio of the standard fuel consumption, the current fuel consumption, and the current fuel consumption to the standard fuel consumption for a predetermined time is output to the display unit 10, the operator can determine whether the current or past operation pattern is efficient, It is possible to judge whether the working pattern is inefficient. As a result, it is possible to induce the worker to work in an efficient working pattern, thereby improving the fuel efficiency of the construction machine.

According to another embodiment of the present invention, the current working state of the working machine 40 is determined by the operating signal of the operating unit 21, the posture of the working machine 40, and the load load placed on the working machine 40. That is, the control unit 20 receives operation signals, information on each posture, and information on the load load from the operation unit 21, the posture detection sensors 51, 52, and 53, The standard fuel consumption corresponding to the information is calculated. At this time, the control unit 20 calculates the standard driving speed of the working machine 40 based on the operation signal, the information about the posture of the working machine 40 and the information about the load load of the working machine 40, Standard fuel economy can be calculated.

More specifically, the standard fuel economy calculation method according to another embodiment of the present invention is characterized in that the standard fuel economy calculation method according to another embodiment of the present invention includes the steps of: receiving operation signals from the operation unit 21, each of the posture detection sensors 51, 52, A step of inputting the attitude detection information and the load load information, and a step of calculating a standard fuel consumption corresponding to the operation signal, the attitude sensing information, and the load load information. Here, the standard driving speeds of the boom 41, the arm 42, and the bucket 43 corresponding to the operation signal, the attitude detection information, and the load load information are calculated, and the standard fuel consumption corresponding to each standard driving speed is calculated .

In contrast to the above embodiment, the standard fuel consumption may be set for each operation mode such as a trench breaking and a leveling mode. In this case, It is possible to determine which operation mode corresponds to the sensed signals and to output the standard fuel economy for the operation mode to the display unit 10. [

1 is a control block diagram schematically showing a fuel efficiency display apparatus for a construction machine according to an embodiment of the present invention,

FIG. 2 is a schematic view showing an example of a fuel consumption display method on the display unit shown in FIG. 1;

3 is a view schematically showing another example of the fuel consumption display method on the display unit shown in Fig. 1,

FIG. 4 is a view schematically showing a table in which a standard fuel economy is set according to the size of an operation signal in the memory shown in FIG. 1;

FIG. 5 is a view schematically showing a table in which a standard fuel consumption according to an operation signal, a working machine attitude, and a load load is set in the memory shown in FIG.

DESCRIPTION OF THE REFERENCE NUMERALS OF THE DRAWINGS

10; A display section 11; The first region

12; A second region 13; The third region

20; A control unit 21; Control unit

30; An engine control unit 31; engine

40; A working machine 41; Boom

42; Arm 43; Bucket

51; A boom posture detection sensor 52; Arm position detection sensor

53; A bucket posture sensor 54; Load sensor for work load

60; Memory 70; Hydraulic pump

71; Swash plate angle adjuster

Claims

A fuel efficiency display device for a construction machine for driving a working machine (40) by operating oil of a hydraulic pump (70) driven by an engine (31)

A display unit 10 for displaying a standard fuel consumption and a current fuel consumption; And

The standard fuel consumption is set in accordance with the operation state and the standard fuel consumption is calculated from the current operation state and outputted to the display unit 10. The engine control unit 30 for controlling the engine 31 A control unit (20) for outputting current fuel consumption to the display unit (10)

/ RTI >

The operation state includes an operation signal output from an operation unit 21 for driving the work machine 40, a posture of the work machine 40, and a load on a work machine load applied to the work machine 40,

Wherein the control unit (20) calculates the standard fuel economy based on the operation signal, the posture of the working machine (40), and the load load applied to the working machine (40).

The method according to claim 1,

The display unit 10 includes a first area 11 and a second area 12,

Wherein the control unit (20) outputs the standard fuel consumption and the current fuel consumption to the first region (11) and the second region (12), respectively, in letters or numbers.

The method according to claim 1,

Wherein the control unit (20) outputs the standard fuel consumption and the current fuel consumption to the display unit (10) in a graph with respect to time.

The method according to claim 1,

The control unit (20)

Calculating a ratio of a standard fuel consumption amount according to the standard fuel consumption to an actual fuel consumption amount according to the current fuel consumption and a current fuel consumption amount with respect to the standard fuel consumption amount for a set time,

And outputs the ratio of the current fuel consumption amount to the standard fuel consumption amount as a percentage to the display unit (10).

The method according to claim 1,

Wherein the operation state is a magnitude of an operation signal outputted from an operation unit (21) for driving the working machine (40).

delete

The method according to claim 1,

The working machine 40 includes a boom 41, an arm 42 and a bucket 43,

The control unit 20 includes a boom posture sensor 51 for detecting the posture of the boom 41, an arm posture sensor 52 for detecting the posture of the arm 42, ) Of the working machine (40) from a signal output from a bucket posture detecting sensor (53) for detecting the posture of the working machine (40).

A fuel economy display method of a construction machine for driving a working machine (40) by operating oil of a hydraulic pump (70) driven by an engine (31)

a) calculating a standard fuel consumption corresponding to a current working state of the working machine (40);

b) receiving current fuel consumption from the engine control unit (30) for controlling the engine (31); And

c) outputting the calculated standard fuel economy and the received current fuel economy to the display unit 10

/ RTI >

The current working state of the working machine 40 in the step a) includes an operating signal of the operating part 21 for driving the working machine 40,

The working machine 40 includes a boom 41, an arm 42 and a bucket 43,

The step a)

a1) receiving information on the posture of the boom (41), the arm (42), and the bucket (43);

a2) receiving an operation signal for driving the boom (41), the arm (42), and the bucket (43) from the operation unit (21);

a3) receiving a load load of the bucket 43; And

a4) calculating a standard fuel consumption ratio corresponding to the information input from the steps a1) to a3)

Of the construction machine.

delete

A standard fuel consumption calculation method of a construction machine for driving a working machine (40) by operating oil of a hydraulic pump (70) driven by an engine (31)

a) receiving an operation signal for driving the working machine (40);

b) receiving a posture of the working machine 40;

c) receiving a load load of the working machine 40; And

and d) calculating a standard fuel consumption ratio from the operation signal, the posture of the working machine (40) and the load load of the working machine (40).

The method according to claim 11,

The step d)

d1) calculating a standard driving speed of the working machine (40) from the load of the working machine (40), the attitude of the working machine (40) and the operation signal; And

d2) calculating a standard fuel consumption ratio for driving the working machine (40) at the calculated standard driving speed.