WO2007072701A1 - Chargeuse sur pneus - Google Patents

Chargeuse sur pneus Download PDF

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Publication number
WO2007072701A1
WO2007072701A1 PCT/JP2006/324689 JP2006324689W WO2007072701A1 WO 2007072701 A1 WO2007072701 A1 WO 2007072701A1 JP 2006324689 W JP2006324689 W JP 2006324689W WO 2007072701 A1 WO2007072701 A1 WO 2007072701A1
Authority
WO
WIPO (PCT)
Prior art keywords
saving operation
energy
accelerator
engine
display
Prior art date
Application number
PCT/JP2006/324689
Other languages
English (en)
Japanese (ja)
Inventor
Yuuichi Iwamoto
Nobumasa Takamatsu
Motoki Oba
Original Assignee
Komatsu Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd. filed Critical Komatsu Ltd.
Priority to JP2007551040A priority Critical patent/JP4892491B2/ja
Priority to CN2006800424962A priority patent/CN101310081B/zh
Publication of WO2007072701A1 publication Critical patent/WO2007072701A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K26/00—Arrangements or mounting of propulsion unit control devices in vehicles
    • B60K26/02—Arrangements or mounting of propulsion unit control devices in vehicles of initiating means or elements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/26—Indicating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • B60Y2200/415—Wheel loaders

Definitions

  • the present invention relates to a wheel loader.
  • Patent Document 1 Japanese Patent Laid-Open No. 2005-98988
  • the operation is performed by comparing the fuel consumption rate with the target set value, and the operation is relatively fuel-efficient!
  • the operation (hereinafter referred to as "energy-saving operation") It is possible to prompt the operator to save energy to improve fuel efficiency.
  • the calculation of the fuel consumption rate is relatively complicated, and there is a demand for a construction machine that can more easily determine the power-saving power of energy-saving operation and prompt the operator to save energy.
  • An object of the present invention is to provide a wheel loader that can more easily determine whether or not the power is energy-saving operation and prompt an operator to save energy.
  • a wheel loader includes an engine, a hydraulic pump for work implement, a work implement, a cab, an accelerator opening detector, an engine controller, an engine speed detector, a table Display control unit.
  • the work machine hydraulic pump is driven by the output of the engine.
  • the work machine is driven by the hydraulic oil discharged from the work machine hydraulic pump.
  • the cab is provided with an accelerator operated by an operator and a display unit for displaying various information.
  • the accelerator opening detector detects the accelerator opening.
  • the engine control unit controls the engine speed according to the opening of the accelerator through all speed control that adjusts the speed in almost the entire engine speed range.
  • the engine speed detection unit detects the actual engine speed.
  • the display control unit displays the energy saving operation suggestion display on the display unit to suggest the energy saving operation to the operator depending on whether the accelerator opening and the actual engine speed satisfy the predetermined energy saving operation condition. Judge whether to hide.
  • the operator can perform an energy saving operation by using the indication of non-display of the energy saving operation suggestion display as a guideline for the operation.
  • the accelerator opening and the actual engine speed correspond to the engine output. For this reason, it is possible to accurately determine whether or not the vehicle is in an energy saving operation state based on the accelerator opening and the engine speed that are relatively easy to detect. As a result, the wheel loader can more easily determine whether or not the power is energy-saving operation and prompt the operator to perform energy-saving operation.
  • the wheel loader according to the second invention is the wheel loader according to the first invention
  • the energy saving operation suggestion display is an energy saving operation mark indicating that the energy saving operation is performed.
  • the display control unit displays an energy-saving operation mark on the display unit when the accelerator opening and the actual engine speed satisfy the energy-saving operation conditions, and the accelerator opening and engine actual engine speed are used for energy-saving operation. If the conditions are not met, the energy saving operation mark is not displayed on the display.
  • the energy saving operation mark is displayed when the energy saving operation is performed, and the energy saving operation mark is not displayed when the energy saving operation is not performed. For this reason, the operator can easily perform the energy saving operation by operating so that the energy saving operation mark is displayed.
  • a wheel loader is the wheel loader according to the second aspect of the present invention, further comprising a selector in the cab.
  • the selection unit includes a plurality of work modes including a first work mode and a second work mode having a smaller engine output and higher fuel efficiency than the first work mode. Medium force For the operator to select the desired working mode.
  • the display control unit displays the energy-saving operation mark on the display unit.
  • the engine output is automatically suppressed by selecting the second work mode by the selection unit, and the energy saving operation with good fuel efficiency is achieved. It can be performed.
  • workability when workability is important, by selecting the first work mode, it is possible to perform operation with high engine output and good workability.
  • energy-saving operation with good fuel efficiency by driving with the energy-saving operation mark as a guide.
  • the wheel loader according to the fourth invention is the wheel loader according to the third invention, wherein the energy-saving operation condition is that the engine output is within the engine output range in the second work mode and the opening degree of the accelerator This is the actual engine speed.
  • a wheel loader includes an engine, a hydraulic pump for work implement, a work implement, a cab, an accelerator opening detection unit, an engine control unit, and a display control unit.
  • the work machine hydraulic pump is driven by the output of the engine.
  • the work implement is driven by the pressure oil discharged from the work implement hydraulic pump.
  • the cab is provided with an accelerator operated by an operator, a display unit for displaying various information, and a selection unit.
  • the selection unit allows the operator to select a desired work mode from a plurality of work modes including the first work mode, the engine output smaller than that of the first work mode, the fuel efficiency, and the second work mode. Is.
  • the accelerator position detector detects the accelerator position.
  • the engine control unit controls the engine speed according to the opening of the accelerator by all-speed control that adjusts the speed in substantially the entire engine speed range. Then, when the first work mode is selected, the display control unit sets the accelerator opening to a predetermined value. Whether or not to display the energy saving operation suggestion display on the display section to indicate to the operator energy saving operation is judged depending on whether or not it is below the reference opening.
  • the operator can perform energy-saving operation by setting the display / non-display of the energy-saving operation suggestion display as a guide for operation.
  • all speed control is performed in this wheel guard, so the accelerator opening corresponds to the engine output. For this reason, it is possible to accurately determine whether or not the vehicle is in the energy saving operation state only by the accelerator opening that is relatively easy to detect. As a result, it is possible to more easily determine whether or not the operation is energy-saving operation and prompt the operator to perform energy-saving operation.
  • a wheel loader is the wheel loader according to the fifth invention, and the energy saving operation suggestion display is an energy saving operation mark indicating that the energy saving operation is being performed.
  • the display control unit displays an energy saving operation mark on the display unit when the first work mode is selected and the accelerator opening is equal to or less than a predetermined reference opening, the first work mode is selected and the accelerator is The energy saving operation mark is not displayed on the display when the opening of the valve exceeds the predetermined reference opening.
  • the energy saving operation mark is displayed when the energy saving operation is performed, and the energy saving operation mark is not displayed when the energy saving operation is not performed. For this reason, the operator can perform an energy saving operation by operating so that the energy saving operation mark is displayed.
  • a wheel loader is the wheel guard according to any one of the first invention power and the sixth invention, wherein the display control unit has a first reference with a predetermined pump pressure of the hydraulic pump for work implement. If the pump pressure is exceeded, do not display the energy saving operation mark on the display.
  • the pump pressure of the working machine hydraulic pump is further taken into consideration, and it is determined whether or not the energy saving operation mark is displayed. For this reason, it is possible to more accurately grasp whether or not energy-saving operation is performed.
  • a wheel loader is the wheel guard according to any one of the first invention power and the sixth invention, comprising a steering hydraulic pump driven by the output of the engine and a steering hydraulic pump. And a steering cylinder driven by the discharged pressure oil.
  • the display control unit sets the pump pressure of the steering hydraulic pump to a predetermined value. When the second reference pump pressure is exceeded, the energy saving operation mark is not displayed on the display.
  • the pump pressure of the steering hydraulic pump is further taken into consideration to determine whether the energy saving operation mark is displayed or not. For this reason, it is possible to more accurately determine whether the energy saving operation is performed and whether the power is V or not.
  • the wheel loader according to the ninth invention is the wheel loader according to the first invention, and the energy-saving operation suggestion display is a non-energy-saving operation mark indicating that driving is performed with low fuel consumption.
  • the display control unit displays a non-energy saving operation mark on the display unit when the accelerator opening and the actual engine speed do not satisfy the energy-saving operation condition, and the accelerator opening and the actual engine speed are energy-saving. If the operating conditions are met, do not display the non-energy saving operation mark on the display.
  • the wheel loader according to the tenth invention is the wheel loader according to the fifth invention, and the energy-saving operation suggestion display is a non-energy-saving operation mark indicating that driving is performed with low fuel consumption.
  • the display control unit displays a non-energy-saving operation mark on the display unit when the first work mode is selected and the accelerator opening exceeds a predetermined reference opening, and the first work mode is selected and If the accelerator opening is less than the predetermined reference opening, do not display the non-energy saving operation mark on the display.
  • a wheel loader is the wheel loader according to the fifth aspect of the present invention, further comprising an operating force increasing portion that increases the operating force of the accelerator when the accelerator opening is equal to or greater than the reference opening.
  • the operation force of the accelerator increases when the accelerator opening is equal to or larger than the reference opening. For this reason, the operator can grasp whether or not the energy saving operation is being executed by changing the accelerator operating force together with the display / non-display of the energy saving operation suggestion display. As a result, the wheel loader can prompt the operator to save energy by both visual and accelerator operation.
  • a wheel loader includes an engine, a hydraulic pump for work implement, a work implement, a cab, an accelerator opening detection unit, an engine control unit, a display control unit, and an increase in operating force.
  • the work machine hydraulic pump is driven by the output of the engine.
  • the work implement is driven by pressure oil discharged from the work implement hydraulic pump.
  • the cab is provided with an accelerator operated by an operator and a display unit for displaying various information.
  • the accelerator opening detector detects the accelerator opening.
  • the engine control unit controls the engine speed according to the opening of the accelerator through all speed control that adjusts the speed in almost the entire engine speed range.
  • the display control unit determines whether or not to display the energy saving operation suggestion display on the display unit to indicate to the operator whether the accelerator opening is equal to or less than a predetermined reference opening. .
  • the operating force increasing unit increases the operating force of the accelerator when the opening degree of the accelerator is equal to or greater than the reference opening degree.
  • the operator can perform energy-saving operation by using the indication of non-display of the energy-saving operation suggestion display as a guideline for operation.
  • the accelerator operating force increases when the accelerator opening is equal to or greater than the reference opening, so that the operator can perform energy-saving operation by changing the accelerator operating force. It is possible to grasp whether or not it is power. As a result, the wheel loader can prompt the operator to save energy by both visual and accelerator operation.
  • all speed control is performed, so the accelerator opening corresponds to the engine output. For this reason, it is possible to accurately determine whether or not the energy saving operation state power is based only on the accelerator opening, which is relatively easy to detect. As a result, it is possible to more easily determine whether or not the power is energy saving operation, and to prompt the operator to save energy.
  • FIG. 1 is an external side view of a wheel loader 1.
  • FIG. 2 is a schematic diagram showing a configuration of a hydraulic circuit and a control system of the wheel loader 1.
  • FIG. 3 is a diagram showing a display unit.
  • FIG. 5 is a graph showing matching between engine output torque and pump absorption torque.
  • FIG. 6 Schematic diagram showing the configuration and operation of the accelerator pedal
  • FIG. 1 A wheel loader 1 according to an embodiment of the present invention is shown in FIG.
  • the wheel loader 1 includes a vehicle body 2, a work machine 3 attached to the front of the vehicle body 2, four tires 4 that rotate while supporting the vehicle body 2 to travel the vehicle body 2, and an upper part of the vehicle body 2. Equipped with installed cab 5 It is.
  • the vehicle body 2 is provided with an engine 11, a transmission 6, a working machine hydraulic pump 7, a steering hydraulic pump 8, a steering cylinder 9, a control unit 10, and the like.
  • the output torque generated by the engine is distributed to the transmission 6, the work machine hydraulic pump 7, the steering hydraulic pump 8, etc., and becomes the drive power for the work machine 3 and for driving.
  • FIG. 1 is an external side view of the wheel loader 1
  • FIG. 2 is a schematic diagram showing a configuration of a hydraulic circuit and a control system of the wheel loader 1.
  • the engine 11 is a diesel engine, and a fuel injection device 12 that controls the output torque and the rotational speed of the engine 11 is attached. Further, the engine 11 is provided with an engine speed detector 13 that also has a rotation sensor force for detecting the actual speed of the engine 11, and an engine speed signal from the engine speed detector i 3 is input to the controller 10. Is done.
  • a traveling transmission 6 having a torque converter 14 is connected to the output shaft of the engine 11, and the driving force from the engine 11 is transmitted to the tire 4 via the transmission 6.
  • the transmission 6 can switch the reduction ratio in multiple steps from high speed to low speed, and the reduction ratio can be switched based on an operation signal from the operation unit 15 described later.
  • the work machine hydraulic pump 7 is a variable displacement hydraulic pump driven by the output of the engine 11.
  • the work machine hydraulic pump 7 uses the hydraulic oil discharged from the work machine hydraulic pump 7.
  • a regulator 16 for adjusting the tilt angle of the swash plate of the working machine hydraulic pump 7 and an electromagnetic control valve 17 for controlling the regulator 16 based on a control current of 10 forces are provided.
  • a pressure sensor 18 for detecting the discharge pressure of the work machine hydraulic pump 7 is provided, and a pump discharge pressure signal from the pressure sensor 18 is input to the control unit 10.
  • the work implement 3 is a portion that is driven by the hydraulic oil discharged from the work implement hydraulic pump 7.
  • the work implement 3 is attached to the front end of the vehicle body 2 and to the tip of the lift arm 19. It has a packet 20 attached and a work machine cylinder 21 (see FIG. 2).
  • the lift arm 19 is an arm member for lifting the packet 20 attached to the tip.
  • the packet 20 is attached to the tip of the lift arm 19.
  • the work machine cylinder 21 is a hydraulic actuator that drives the lift arm 19 and the packet 20 with the pressure oil discharged from the work machine hydraulic pump 7.
  • the steering hydraulic pump 8 is a variable displacement type driven by the output of the engine 11. Based on the control current from the regulator 22 that adjusts the tilt angle of the swash plate of the hydraulic pump 8 for steering using the hydraulic oil discharged from the hydraulic pump 8 for steering, and the control unit 10 And an electromagnetic control valve 23 for controlling the regulator 22.
  • the steering cylinder 9 is driven by the pressure oil discharged from the steering hydraulic pump 8, and changes the traveling direction during traveling. Further, a pressure sensor 24 for detecting the discharge pressure of the steering hydraulic pump 8 is provided, and a pump discharge pressure signal from the pressure sensor 24 is input to the control unit 10.
  • the cab 5 is configured by combining a plurality of steel pipes and steel plates, and is disposed slightly forward of the central portion of the vehicle body 2.
  • the cab 5 is provided with an accelerator pedal 25 (accelerator) and an operation unit 15 (selection unit) operated by an operator, a display unit 26 for displaying various information, and the like.
  • the accelerator pedal 25 is means for instructing the target rotational speed of the engine 11, and is connected to an accelerator opening detector 27 which also has a potentiometer force for detecting the opening of the accelerator pedal 25.
  • the opening signal indicating the opening of the accelerator pedal 25 is sent from the accelerator opening detector 27 to the controller 10, and the control signal is output from the controller 10 to the fuel injection device 12.
  • the operation unit 15 has a steering, an operation lever, an operation button, and the like (not shown), changes the traveling direction of the wheel loader 1, a power mode (first operation mode), and an economy mode.
  • the power mode is a work mode that is selected when workability is more important than fuel economy, where the engine output is greater than the economy mode.
  • the economy mode is a work mode in which the engine output is smaller than the power mode, and the workability is inferior but the fuel consumption is good.
  • the display unit 26 is a display panel arranged in front of the seat inside the cab 5 and, as shown in Fig. 3, various pilot lamps 28 that are lit during operation of a device such as a parking brake.
  • a speed meter 29 indicating the traveling speed, a fuel gauge 30, a shift indicator 31 indicating the selected reduction ratio, and the like are displayed.
  • the display unit 26 displays an eco lamp 32 (energy saving operation mark) to indicate that economical energy saving operation is being performed. Display is possible.
  • FIG. 4 shows an enlarged view of the eco lamp 32.
  • the control unit 10 is a part that controls the driving operation of the wheel loader 1, and includes an engine control unit 33 and a display control unit 34.
  • the engine control unit 33 controls the fuel injection amount of the fuel injection device 12 based on the opening degree of the accelerator pedal 25 and the actual rotational speed of the engine 11.
  • the engine control unit 33 performs all speed control and can control the engine speed according to the opening degree of the accelerator pedal 25.
  • All-speed control is a control that regulates the speed in almost all speed ranges and load ranges except for the fuel increase range at start-up, and the engine speed can be kept almost constant even when the load fluctuates. it can.
  • the display control unit 34 is a part that controls the display content of the display unit 26, and controls display / non-display of the eco lamp 32.
  • control unit 10 Details of control by the control unit 10 will be described.
  • a power mode that emphasizes workability and an economy mode that emphasizes fuel efficiency can be selected by operating the operation unit 15 by an operator.
  • the engine output torque characteristic indicated by the engine output torque line ELa and the absorption torque characteristic indicated by the absorption torque line PLa are set.
  • the absorption torque characteristic is the sum of the absorption torque of the torque converter 14 and the absorption torque of the work machine hydraulic pump 7 and is determined by the travel environment, work load, adjustment of the discharge oil amount of the work machine hydraulic pump 7 and the like.
  • the absorption torque line PLa is a monotonically increasing function with the engine speed as a variable. Then, at the matching point Ma, the output torque of the engine 11 matches the absorption torque of the work machine hydraulic pump 7 and the torque converter 14, and the engine output at the matching point Ma, that is, the maximum horsepower of the engine 11 is absorbed. Heavy drilling work can be performed with high efficiency!
  • the engine output torque characteristic indicated by the engine output torque line of symbol ELb is set. And at the matching point Mb thus, the output torque of the engine 11 is matched with the absorption torque of the work machine hydraulic pump 7 and the torque converter 14. As described above, in the economy mode, the fuel consumption rate is lower than the matching point Ma in the power mode. At the matching point Mb, the output torque of the engine 11 and the absorption of the hydraulic pump 7 for the work implement and the torque converter 14 are absorbed. Since the torque can be matched, the engine 11 can be used in a fuel efficient region, and the fuel consumption can be improved.
  • the eco lamp 32 is lit on the display unit 26 when the operation performed by the operator is economical, and the eco lamp 32 is turned off when the operation is not energy saving. The operator can be encouraged to save energy.
  • the display control unit 34 displays the echo lamp 32 on the display unit 26 so that the power mode is If it is selected and the opening of the accelerator pedal 25 and the engine speed do not satisfy the energy-saving operation conditions, the echo lamp 32 is not displayed on the display unit 26.
  • This energy-saving operation condition is the opening degree of the accelerator pedal 25 and the engine speed at which the engine output is within the engine output range in the economy mode.
  • the control unit 10 detects the opening degree of the accelerator pedal 25 and the number of engine revolutions in which the engine output is within the range of the engine output torque line ELb (notched range) shown in FIG. In this case, the eco lamp 32 is turned on, and the eco lamp 32 is turned off when the opening of the accelerator pedal 25 and the engine speed exceeding this range are detected.
  • the engine lamp 32 is always displayed because the engine output is always within the range of the engine output torque line ELb.
  • the eco lamp 32 is turned on when economical energy saving operation is performed, and the eco lamp 32 is turned off when energy saving operation is not performed.
  • the operator can be informed of the recommended engine output range for energy saving operation based on whether or not the Eco lamp 32 is displayed. For this reason, the operator Energy saving operation can be easily performed by operating the accelerator pedal 25 so that the eco lamp 32 lights up using the eco lamp 32 as a guideline for driving.
  • the eco lamp 32 that is turned on when an economical energy-saving operation is performed! / Speaks suggests energy-saving operation.
  • an uneconomic energy-saving operation with low fuel consumption is performed.
  • energy-saving operation may be suggested by a non-energy-saving operation lamp (non-energy-saving operation mark, energy-saving operation suggestion display) that is lit in this case.
  • the display control unit 34 displays a non-energy-saving operation lamp on the display unit when the opening degree of the accelerator pedal 25 and the actual number of revolutions of the engine 11 do not satisfy the energy-saving operation condition. If the opening of the engine and the actual engine speed of the engine 11 satisfy the energy-saving operation conditions, do not display the non-energy-saving operation lamp on the display unit 26.
  • Other configurations and controls are the same as in the above embodiment.
  • Such a non-energy-saving operation lamp can also prompt the operator to save energy. That is, the operator can easily perform the energy saving operation by operating so that the non-energy saving operation mark is not displayed.
  • the display of the eco lamp 32 that is determined to be 'hidden' is determined by the opening of the accelerator pedal 25 and the actual speed of the engine 11.
  • the display of the eco lamp 32 is not displayed only by the opening of the accelerator pedal 25 May be determined. That is, the display control unit 34 displays an echo lamp on the display unit 26 when the power mode is selected and the opening degree of the accelerator pedal 25 is equal to or less than a predetermined reference opening degree, and the power mode is selected and the accelerator pedal 25 is operated. If the opening exceeds the specified reference opening, the display 26 will 32 is not displayed.
  • the reference opening is an opening that is an engine output range recommended for energy-saving operation, for example, an opening that is within the engine output range in the economy mode. Other configurations and controls are the same as those in the above embodiment.
  • the opening degree of the accelerator pedal 25 and the engine output generally correspond to each other, so that the engine output can be grasped relatively accurately only by the opening degree of the accelerator pedal 25.
  • energy-saving operation may be suggested by a non-energy-saving operation mark indicating low fuel consumption and driving.
  • the display control unit 34 displays a non-energy saving operation mark on the display unit 26 when the power mode is selected and the opening degree of the accelerator pedal 25 exceeds a predetermined reference opening degree, and the power mode is selected and When the opening of the accelerator pedal 25 is less than the predetermined reference opening, the non-energy-saving operation mark is not displayed on the display unit 26.
  • Such a non-energy-saving operation lamp can also prompt the operator to save energy. That is, the operator can easily perform the energy saving operation by operating so that the non-energy saving operation mark is not displayed.
  • the pump pressure of the working machine hydraulic pump 7 may be considered. . That is, even if the opening degree of the accelerator pedal 25 and the engine speed satisfy the energy saving operation condition, the display control unit 34 determines that the pump pressure of the work machine hydraulic pump 7 is a predetermined first reference pump pressure (for example, If the maximum pump pressure is exceeded (80%), the eco lamp 32 may be turned off. As a result, the engine output can be grasped more accurately, and the operator can be encouraged to perform energy saving operation more accurately.
  • a predetermined first reference pump pressure for example, If the maximum pump pressure is exceeded (80%)
  • the pump pressure of the steering hydraulic pump 8 may be considered. Good. That is, the display control unit 34 is a steering hydraulic pump. Even when the pump pressure of 8 exceeds a predetermined second reference pump pressure (for example, 80% of the maximum pump pressure), control to turn off the eco lamp 32 may be performed. As a result, the engine output can be grasped more accurately, and the energy-saving operation can be urged to the operator more accurately.
  • a predetermined second reference pump pressure for example, 80% of the maximum pump pressure
  • an operation force increasing unit 43 that increases the operation force of the accelerator when the opening of the accelerator pedal 25 is greater than or equal to the reference opening may be further provided.
  • the detailed structure of the accelerator pedal 25 is as follows.
  • the accelerator pedal 25 includes a pedal body 41, a pedal support member 42, and an operation force increasing portion 43.
  • FIG. 6 (a) shows the state of the accelerator pedal 25 when it is not operated by the operator (hereinafter referred to as “no operation state”).
  • FIG. 6B shows a state where the accelerator pedal 25 is operated by the first operation amount ⁇ A from the non-operation state (hereinafter referred to as “first operation state”).
  • FIG. 6 (c) shows a state where the accelerator pedal 25 is further operated from the first operation state to the maximum operation amount ⁇ Max (hereinafter referred to as “maximum operation state”).
  • the first manipulated variable ⁇ A and the maximum manipulated variable ⁇ Max are the amount of change in the operation angle from the no-operation state.
  • the pedal support member 42 is a member that supports an intermediate portion of the pedal body 41, and one end of the pedal support member 42 is attached to the pedal body 41 so as to be rotatable about the second rotation shaft 32.
  • a rotating wheel 46 is rotatably attached to the other end of the pedal support member 42 and abuts against an inclined surface 50 provided on the floor surface of the cab 5.
  • a protrusion 47 that protrudes upward is provided in the middle portion of the pedal support member 42.
  • the pedal support member 42 rotates around the second rotating shaft 32 (see arrow AW3 in FIG. 6 (b)).
  • the pedal support member 42 has an elastic portion (not shown). The pedal support member 42 is urged in a direction to return the pedal body 41 to the non-operating state.
  • the operation force increasing portion 43 is a panel panel attached to the back side of the pedal body 41, and increases the operation force of the accelerator pedal 25 when the operation amount of the accelerator pedal 25 is larger than the first operation amount ⁇ A. . That is, the operating force increasing portion 43 is rotated so that the pedal body 41 approaches the floor and the inclination angle of the pedal body 41 is changed, thereby approaching the protrusion 47 of the pedal support member 42, and FIG. As shown in b), when the operation amount of the pedal body 41 becomes the first operation amount ⁇ A, it comes into contact with the protrusion 47. Then, as shown in FIG.
  • the opening of the accelerator pedal 25 (hereinafter referred to as “accelerator opening”) is “0%” when the accelerator pedal 25 is not operated, and the amount of operation of the accelerator pedal 25 is increased. When the accelerator pedal 25 is in the maximum operating state, it is “100%”.
  • the present invention is useful as a wheel loader because it has an effect of prompting the operator to save energy by more simply determining whether or not the operation is energy saving.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Indicating Measured Values (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

La présente invention concerne une chargeuse sur pneus dans laquelle il est facile de déterminer si une opération d’économie d’énergie est réalisée et, dans le cas contraire, il est suggéré à l’opérateur de réaliser l’opération d’économie d’énergie. Dans la chargeuse sur pneus, le régime d’un moteur est commandé selon le degré d’ouverture d’une pédale d’accélérateur par toute commande de régime dans laquelle le régime est régulé dans la plage de régime sensiblement entière du moteur. La détermination pour savoir s’il faut afficher un signe d’opération d’économie d’énergie sur une section d’affichage est réalisée si le degré d’ouverture de l’accélérateur et le régime réel du moteur satisfont des conditions prédéterminées de l’opération d’économie d’énergie, où le signe d’opération d’économie d’énergie est un signe pour conseiller à l’opérateur de réaliser l’opération d’économie d’énergie.
PCT/JP2006/324689 2005-12-21 2006-12-11 Chargeuse sur pneus WO2007072701A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2007551040A JP4892491B2 (ja) 2005-12-21 2006-12-11 ホイールローダ
CN2006800424962A CN101310081B (zh) 2005-12-21 2006-12-11 轮式装载机

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JP5242786B2 (ja) * 2009-06-19 2013-07-24 日立建機株式会社 作業車両の制御装置
JP2011144734A (ja) * 2010-01-13 2011-07-28 Kubota Corp 燃料消費量評価システム
US8494754B2 (en) 2010-01-13 2013-07-23 Kubota Corporation Condition evaluation system for engine-driven traveling vehicle
JP2012025531A (ja) * 2010-07-22 2012-02-09 Tadano Ltd 操作指示装置及び作業車
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JP2013234500A (ja) * 2012-05-09 2013-11-21 Komatsu Ltd 建設機械、及び建設機械の運転動作の良否報知方法
WO2013168312A1 (fr) * 2012-05-09 2013-11-14 株式会社小松製作所 Engin de chantier et procédé de notification d'acceptabilité d'une opération d'entraînement de l'engin de chantier
CN102733441A (zh) * 2012-06-15 2012-10-17 三一重机有限公司 挖掘机升速控制节能系统及方法
JP2015121161A (ja) * 2013-12-24 2015-07-02 日立建機株式会社 作業機械の省エネ運転支援装置
WO2020003638A1 (fr) 2018-06-29 2020-01-02 株式会社小松製作所 Machine de travail et système comprenant une machine de travail
WO2020003637A1 (fr) 2018-06-29 2020-01-02 株式会社小松製作所 Machine de travail et système comprenant une machine de travail
WO2020003636A1 (fr) 2018-06-29 2020-01-02 株式会社小松製作所 Machine de travail et système comprenant une machine de travail
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JPWO2007072701A1 (ja) 2009-05-28
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