JP2008062791A - Fuel economy display device and working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an fuel economy display device and a working vehicle capable of appropriately urging an operator to do energy saving operation even if work environment and details of work change. <P>SOLUTION: A monitor device 6 is a fuel display device indicating fuel economy of the working vehicle, and is provided with a fuel economy calculating part 63, a display part 61 and a target fuel economy change part 64. The fuel economy calculating part 63 calculates fuel economy of the working vehicle. The display part 61 indicates whether fuel economy calculated by the fuel economy calculating part 63 is target fuel economy or more. Then, the target fuel economy change part 64 changes target fuel economy by input of a user. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fuel consumption display device and a work vehicle.

Some work vehicles such as a hydraulic excavator can issue an alarm so as to prompt the operator to drive to improve fuel efficiency during driving (see Patent Document 1). In this work vehicle, the measured fuel consumption is compared with a preset target value to determine whether or not the fuel consumption is greater than the target value. When it is determined that the fuel consumption is larger than the target value, an alarm is issued. Here, the fuel efficiency target value to be referred to is set in advance in a ROM (Lead Only Memory) or the like that is determined for each type of work vehicle and provided in the monitor device.
JP-A-4-366729

  However, the work vehicle is used in various environments, and the load received by the work vehicle is usually different depending on the environment in which the work vehicle is used, the work content, and the like. Therefore, the desired target value of fuel consumption varies depending on the environment in which the work vehicle is used. If the target value is fixed as described above, it is difficult to appropriately issue an alarm according to the work environment. For example, in a severe work environment with a heavy load, the fuel consumption inevitably increases, making it difficult to achieve a fuel consumption smaller than the target value. Under such circumstances, even if an alarm is issued, it is impossible for the operator to perform driving with low fuel consumption. Further, in a work environment with a small load, since a fuel consumption that is lower than the target value can be easily realized, warnings are not generated. Under such circumstances, it is difficult to encourage the operator to save energy.

  An object of the present invention is to provide a fuel consumption display device and a work vehicle that can appropriately prompt an operator to save energy even when the work environment, work content, and the like change.

  A fuel consumption display device according to a first aspect of the present invention is a fuel consumption display device that displays the fuel consumption of a work vehicle, and includes a fuel consumption calculation unit, a fuel consumption display unit, and a target fuel consumption change unit. The fuel consumption calculation unit calculates the fuel consumption of the work vehicle. The fuel consumption display unit displays whether or not the fuel consumption calculated by the fuel consumption calculation unit is greater than or equal to the target fuel consumption. And a target fuel consumption change part changes a target fuel consumption by the input from a user.

  In this fuel consumption display device, the user can change the target fuel consumption. Therefore, when the work environment or the like of the work vehicle is changed, a user such as an operator or an administrator can change to a desired target fuel consumption according to the work environment or the like. And a fuel consumption display part displays whether the fuel consumption calculated by the fuel consumption calculation part is more than the target fuel consumption set by the user. Thereby, in this fuel consumption display device, even if the working environment or the like changes, it is possible to appropriately prompt the operator to save energy.

  The fuel consumption display device of the second invention is the fuel consumption display device of the first invention, and the fuel consumption calculation unit calculates the cumulative fuel consumption based on the cumulative fuel consumption from a predetermined time point as the fuel consumption.

  In this fuel consumption display device, the accumulated fuel consumption is calculated by the fuel consumption calculation unit, so that the fuel consumption display displayed on the fuel consumption display unit is not displayed as sensitively as in the case of instantaneous fuel consumption, but is displayed stably. The For this reason, the fuel consumption display is easy for the operator to refer to.

  A fuel consumption display device according to a third aspect of the present invention is the fuel consumption display device of the second invention, wherein the fuel consumption calculation unit resets the accumulated fuel consumption calculation time point by an input from a user.

  In this fuel consumption display device, the user can reset the starting point of the accumulated fuel consumption. For this reason, when the working environment or the like of the work vehicle changes, the accumulated fuel efficiency can be calculated according to the change of the working environment or the like by resetting the starting point of the accumulated fuel consumption.

  A fuel consumption display device according to a fourth aspect of the present invention is the fuel consumption display device according to the second or third aspect of the present invention, wherein the fuel consumption calculation unit resets the accumulated fuel consumption start time when the target fuel consumption is changed by the target fuel consumption change unit. .

  In this fuel consumption display device, when the target fuel consumption is changed by the target fuel consumption change unit, the calculation time point of the cumulative fuel consumption is automatically reset. When the target fuel consumption is changed, the work environment of the work vehicle is often changed. In such a case, the calculation time of the accumulated fuel consumption is automatically reset, and the user is troubled. Therefore, it is possible to calculate the cumulative fuel consumption corresponding to the change in the work environment of the work vehicle.

  A fuel consumption display device according to a fifth aspect of the present invention is the fuel consumption display device according to any one of the first through fourth aspects, wherein the target fuel consumption change unit can change the target fuel consumption in a plurality of stages.

  In this fuel consumption display device, the target fuel consumption change unit allows the user to selectively change the target fuel consumption from a plurality of stages. For this reason, it is easy to set the target fuel consumption.

  A fuel consumption display device according to a sixth aspect of the present invention is the fuel consumption display device according to any one of the first to fifth aspects, wherein the fuel consumption display unit displays the fuel consumption in a bar, and the bar display exceeds a position corresponding to the target fuel consumption. In such a case, the portion above the target fuel consumption is displayed in a different color from the portion below the target fuel consumption.

  In this fuel consumption display device, the display of fuel consumption is easier for the operator to refer to by color-coding the bar display. For this reason, an operator can recognize more easily whether a fuel consumption is more than a target fuel consumption.

  A work vehicle according to a seventh aspect of the present invention displays a fuel consumption display according to any one of claims 1 to 6, wherein a hydraulic work machine and a traveling device driven using power from the engine and fuel consumption of fuel consumed in the engine are displayed. Device.

  In this work vehicle, the operator can easily recognize whether or not the fuel consumption of the fuel consumed in the engine is equal to or higher than the target fuel consumption by the fuel consumption display device. For this reason, the operator can be urged to improve the fuel consumption for both the operation of the hydraulic working machine and the traveling operation.

  In the fuel consumption display device according to the present invention, when the work environment or the like of the work vehicle is changed, the user can change to a desired target fuel consumption according to the work environment or the like. And a fuel consumption display part displays whether the fuel consumption calculated by the fuel consumption calculation part is more than the target fuel consumption set by the user. Thereby, in this fuel consumption display device, even if the working environment or the like changes, it is possible to appropriately prompt the operator to save energy.

<Configuration of work vehicle 1>
A work vehicle 1 according to an embodiment of the present invention is shown in FIG. The work vehicle 1 is a hydraulic excavator, and includes a main body 2, a cab 3 placed on the main body 2, a hydraulic working machine 4 attached to the main body 2, and a traveling device that supports the main body 2. 5.

  The hydraulic working machine 4 includes an arm 41, a boom 42, a bucket 43, and hydraulic cylinders 44-46 that operate these members. The traveling device 5 includes a plurality of traveling wheels (not shown) and crawler belts 51 wound around the traveling wheels. An engine and a hydraulic pump are housed inside the main body 2, and the hydraulic working machine 4 and the traveling device 5 are driven using power from the engine.

  The cab 3 is equipped with a seat (not shown) on which an operator is seated and various operation members 31 (see FIG. 2) for operating the work vehicle 1. These operation members 31 receive an operation by the operator, output an operation signal, and are sent to the vehicle body control unit 33 together with detection signals from various sensors 32 as shown in FIG. The vehicle body control unit 33 can control the output of the engine 34 by sending a command signal to the engine control unit 35 that controls the fuel injection amount of the engine 34.

  Further, the cab 3 is provided with a monitor device 6 shown in FIG. The monitor device 6 is a device that displays various types of information regarding the work vehicle 1 and receives an operation input from an operator. In particular, the monitor device 6 can function as a fuel consumption display device that displays the fuel consumption of fuel consumed in the engine 34.

  The monitor device 6 includes a display unit 61 and a display control unit 62.

  The display unit 61 is a touch panel type liquid crystal monitor, and displays various types of information regarding the work vehicle 1. Further, the operator can perform various operation inputs by touching the key display displayed on the display unit 61. Details of the information displayed on the display unit 61 will be described later.

  The display control unit 62 includes control parts such as a CPU and a memory, and controls the display unit 61. The display control unit 62 includes a fuel consumption calculation unit 63 and a target fuel consumption change unit 64.

  The fuel consumption calculation unit 63 receives information such as the fuel injection amount and the engine speed from the engine control unit 35 and calculates the fuel consumption of the work vehicle 1. The fuel consumption calculated here is the cumulative fuel consumption based on the cumulative fuel consumption from a predetermined time point, and indicates the fuel consumption per unit time during which the engine 34 is driven. Specifically, it is calculated by the following calculation formula.

[Instantaneous fuel consumption] = [Fuel injection amount [mg / st]] × [Engine speed] ÷ 2 × 60
[Cumulative fuel consumption] = (Σ [Instantaneous fuel consumption]) / [Sampling number]
That is, the instantaneous fuel consumption is calculated from the sampled fuel injection amount and the engine speed at that time, and the cumulative fuel consumption is calculated by dividing the total instantaneous fuel consumption from a predetermined time by the sampling number. The fuel injection amount is sampled every 0.01 sec.

  The fuel efficiency calculated in this way is displayed on the display unit 61. Here, the display unit 61 displays whether or not the fuel consumption calculated by the fuel consumption calculation unit 63 is equal to or higher than the target fuel consumption. And the target fuel consumption change part 64 changes this target fuel consumption by the input from a user.

  Hereinafter, the function as the fuel consumption display device of the monitor device 6 will be described while explaining the display on the display unit 61 in detail.

<Display on display unit 61>
FIG. 3 shows a normal screen 7 displayed on the display unit 61. In the normal screen 7, a cooling water temperature meter 71 indicating the cooling water temperature, a hydraulic oil temperature meter 72 indicating the hydraulic oil temperature, and a fuel amount meter 73 indicating the fuel amount are largely displayed in the center of the screen. In the upper part of the normal screen 7, a current time 74, a work mode 75 currently being executed, a work amount 76, and the like are displayed. Further, below each meter 71-73, a page switching key 77, a user menu display key 78, and the like are displayed, and further below that, a function key 79 is displayed. The operator can select the function assigned to each key display by touching these key displays. In addition, an eco gauge 8 indicating whether or not the fuel efficiency is equal to or higher than the target fuel efficiency is displayed on the side of the normal screen 7.

  The eco gauge 8 displays the fuel consumption in a bar in real time, and the length of the bar indicates the magnitude of the fuel consumption. This bar display is composed of a plurality of blocks (see FIG. 7), and the greater the number of blocks displayed, the longer the bar length and the greater the fuel consumption. When the fuel consumption bar display exceeds the position corresponding to the target fuel consumption, the portion above the target fuel consumption is displayed in a different color from the portion below the target fuel consumption. Specifically, the bar display is composed of ten blocks arranged in the vertical direction from the first block 81 to the tenth block, and the first block 81 to the eighth block 88 located at the lowest position are arranged. For example, it is displayed in green, and the remaining two, that is, the ninth block 89 and the tenth block 90 are displayed in a color different from the other eight blocks 81-88, for example, orange. The boundary between the different colors corresponds to the target fuel consumption. In FIG. 3, only the first block 81 is displayed, which indicates that the fuel consumption is relatively small, that is, the fuel efficient operation is being performed. When the fuel consumption increases from this state, the number of displayed blocks increases, and the bar display extends upward. When the ninth ninth block 89 is displayed in orange, the fuel consumption exceeds the target fuel consumption. In addition, when the first block 81 to the eighth block 88 indicating that the fuel consumption is less than the target fuel consumption is displayed, the first block 81 is displayed in a constantly lit state, and the ninth block 89 indicating that the fuel consumption is equal to or higher than the target fuel consumption and When the tenth block 90 is displayed, it is displayed in a blinking state.

  This target fuel efficiency can be changed by the user as described above. When the lower right user menu display key 78 is pressed on the normal screen 7 in FIG. 3, the user menu screen 10 shown in FIG. 4 is displayed. In the user menu screen 10, when the user presses the arrow keys 11 and 12 to move the cursor 13 to "ECO display setting" and presses the enter key 14, an ECO display selection screen 15 shown in FIG. 5 is displayed. When the cancel key 16 is pressed, the screen returns to the previous screen. On the ECO display selection screen 15, when the user moves the cursor 13 to the “target setting screen” and presses the enter key 14, an ECO display target setting display screen 17 shown in FIG. 6 is displayed. On this ECO display target setting display screen 17, a plurality of ranges having a predetermined width are displayed as target fuel consumption selections, and the user can change the target fuel consumption in a plurality of stages. Here, five ranges having a width of 10 L / H can be selected. Specifically, 140-150 L / H 1st range, 130-140 L / H 2nd range, 130-120 L / H 3rd range, 120-110 L / H 4th range, 110-100 L / H The fifth range can be selected. When the user moves the cursor 13 to a desired range and presses the enter key 14, the target fuel consumption change unit 64 described above changes the target fuel consumption to the lower limit value of the selected range and returns to the normal screen 7.

  When the target fuel consumption is changed, the magnitude of the fuel consumption assigned to each block 81-90 is changed so that the changed target fuel consumption corresponds to the color boundary of the eco gauge 8. That is, assuming that the set target fuel efficiency is A, as shown in the table of FIG. 7, the ninth block 89 indicates a fuel efficiency of “A” or more and less than “A + 10”, and is a range changed by 10 L / H from this range. Are assigned to other blocks. For example, the fuel consumption range of “A-10” or more and less than “A” is assigned to the eighth block 88. The upper limit of the first block 81 is “A-90” and varies depending on the set target fuel consumption, but the lower limit is always 0 L / H. The tenth block 90 indicates a fuel consumption of “A + 10” or more. In FIG. 7, the color coding of the blocks 81-90 is indicated by hatching types.

  In addition, when the target fuel efficiency is changed, the fuel efficiency calculation unit 63 resets the cumulative fuel efficiency calculation time point. The fuel consumption calculation unit 63 calculates the cumulative fuel consumption from the time of reset, and the fuel consumption calculated by the fuel consumption calculation unit 63 is displayed on the display unit 61 as the eco gauge 8. Note that the fuel consumption calculation unit 63 also resets the cumulative fuel consumption calculation time point when there is an input from the user. When “ECO gauge display reset” is selected on the above-described ECO display selection screen 15 (see FIG. 5), the ECO gauge display reset screen 18 shown in FIG. When the enter key 14 is pressed here, the fuel consumption calculation unit 63 resets the cumulative fuel consumption start time and returns to the normal screen 7. The fuel consumption calculation unit 63 holds the accumulated fuel consumption data unless reset.

<Features>
(1)
In this work vehicle 1, it can be easily grasped from the number of blocks of the eco gauge 8 displayed on the display unit 61 whether or not the fuel consumption exceeds the target fuel consumption. In addition, since the fuel consumption is displayed as a bar on the eco gauge 8, it is easy to grasp the degree of margin up to the target fuel consumption or the extent of exceeding the target fuel consumption. When the fuel consumption exceeds the target fuel consumption, blocks of different colors are blinked and displayed, so that it is possible to effectively prompt the operator to reduce the fuel consumption.

  In addition, since the displayed fuel consumption is cumulative fuel consumption, the display does not change as sensitively as when instantaneous fuel consumption is displayed, and the display is easy for the operator to see.

(2)
In this work vehicle 1, the user can easily change the target fuel consumption. For this reason, an appropriate target fuel consumption can be set according to the working environment or the like. In particular, since the target fuel consumption can be set stepwise by selecting from a plurality of ranges, it is easy to set an appropriate target fuel consumption according to the work environment.

  In addition, when the target fuel efficiency is changed, the starting point of the fuel consumption calculation is automatically reset, and the user can arbitrarily reset the starting point of the fuel consumption calculation. Can respond.

<Other embodiments>
(1)
In the above embodiment, a hydraulic excavator is exemplified as the work vehicle 1, but the present invention is also applicable to other types of work vehicles such as a wheel loader and a bulldozer.

(2)
In the above embodiment, the fuel consumption is displayed by a bar display composed of a plurality of blocks 81-90. However, the display is not limited to a block, and may be performed by a plurality of round lamps. Further, the fuel consumption may be continuously indicated by the length of the bar. Furthermore, the display is not limited to a straight bar display, and may be displayed by a curved bar display, a pie chart, a tachometer, or the like.

(3)
In the above embodiment, it is exemplified that, in the bar display, a portion above the target fuel consumption is displayed in orange and a portion below the target fuel consumption is displayed in green. However, the display color is not limited to this. Absent. Further, the number of blocks 81-90 indicating the target fuel consumption or more and less than the target fuel consumption is not limited to the above.

(4)
In the above embodiment, the display unit 61 is a touch panel type liquid crystal panel. However, the display unit 61 is not limited to the touch panel type, and a hard key for operation input may be separately provided. In addition to the liquid crystal panel, other display means may be used.

  INDUSTRIAL APPLICABILITY The present invention has an effect of appropriately prompting an operator to save energy even when the work environment changes, and is useful as a fuel consumption display device and a work vehicle.

1 is an external view of a work vehicle 1. FIG. The block diagram which shows the structure of a fuel consumption display apparatus. The figure which shows the screen shown on a display part. The figure which shows the screen shown on a display part. The figure which shows the screen shown on a display part. The figure which shows the screen shown on a display part. A table showing the correspondence between eco-gauge blocks and fuel efficiency ranges. The figure which shows the screen shown on a display part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work vehicle 4 Hydraulic working machine 5 Traveling apparatus 6 Monitor apparatus (fuel consumption display apparatus)
61 Display (fuel consumption display)
63 Fuel consumption calculation unit 64 Target fuel consumption change unit

Claims (7)

A fuel consumption display device for displaying the fuel consumption of a work vehicle,
A fuel consumption calculation unit for calculating the fuel consumption of the work vehicle;
A fuel consumption display unit that displays whether the fuel consumption calculated by the fuel consumption calculation unit is equal to or higher than a target fuel consumption;
A target fuel efficiency change unit that changes the target fuel efficiency in response to an input from a user;
A fuel consumption display device comprising: The fuel consumption calculation unit calculates cumulative fuel consumption based on cumulative fuel consumption from a predetermined time point as the fuel consumption.
The fuel consumption display device according to claim 1. The fuel consumption calculation unit resets the cumulative fuel consumption start time in response to an input from a user.
The fuel consumption display device according to claim 2. The fuel consumption calculation unit resets the cumulative fuel consumption start time when the target fuel consumption change unit is changed by the target fuel consumption change unit;
The fuel consumption display device according to claim 2 or 3. The target fuel consumption change unit can change the target fuel consumption in a plurality of stages.
The fuel consumption display device according to any one of claims 1 to 4. The fuel consumption display unit displays the fuel consumption in a bar, and when the bar display exceeds a position corresponding to the target fuel consumption, a portion that is greater than or equal to the target fuel consumption is displayed in a different color from a portion that is less than the target fuel consumption.
The fuel consumption display device according to any one of claims 1 to 5. A hydraulic working machine and a traveling device driven using power from the engine;
The fuel consumption display device according to any one of claims 1 to 6, wherein fuel consumption of the fuel consumed in the engine is displayed.
Work vehicle equipped with.