WO2014122984A1

WO2014122984A1 - Dump truck

Info

Publication number: WO2014122984A1
Application number: PCT/JP2014/051118
Authority: WO
Inventors: 浩太郎増田
Original assignee: 日立建機株式会社
Priority date: 2013-02-08
Filing date: 2014-01-21
Publication date: 2014-08-14

Abstract

Provided is a dump truck in which fuel economy can be enhanced by instructing a driver as to the travel speed at which fuel consumption is optimized. The dump truck pertaining to the present invention is provided with a frame (1) for forming a main body, wheels (2), a truck bed (3) provided so as to be able to rotate in the up-down direction on the frame (1), and a driver's cab (4) disposed on the frame (1), and is configured so as to be provided with: a calculation device (8) having a position sensor (5) for detecting the position of the dump truck during travel, a weight sensor (6) for detecting the weight of a load placed on the truck bed (3), a calculation unit (8e) for calculating a target speed at which it is estimated that fuel economy will decrease on the basis of signals outputted from the position sensor (5), the weight sensor (6), and a speed sensor (7), and an output unit (8f) for creating and outputting a travel operation instruction corresponding to the results of calculation; and a display device (9) including a third display unit (9c) for displaying the travel operation instruction.

Description

Dump truck

The present invention relates to a dump truck that transports objects to be transported such as earth and sand.

As shown in Patent Document 1, the large dump truck includes a frame serving as a main body, wheels, that is, front wheels and rear wheels, a loading platform disposed on the frame, and a cab.

¡The ratio of fuel consumption in the maintenance cost of this type of dump truck is high. While it is very difficult to improve the fuel efficiency by improving the driving efficiency of the dump truck, if the driver in the driver's cab operates the accelerator unnecessarily, the fuel efficiency is easily changed by 10% or more.

JP 2011-143849 A

In the dump truck as shown in Patent Document 1 described above, the skill of the driver varies from person to person, and therefore fuel consumption is likely to deteriorate due to excessive depression of the accelerator.

The present invention is made up of the above-described conventional situation, and an object of the present invention is to provide a dump truck that can improve fuel efficiency by instructing the driver the traveling speed at which the fuel consumption is optimized. It is to provide.

In order to achieve this object, the present invention includes a frame forming a main body, wheels, a cargo bed provided on the frame so as to be rotatable in the vertical direction, and a cab arranged on the frame. The dump truck includes a position sensor that detects a traveling position of the dump truck, a weight sensor that detects a weight of a load loaded on the loading platform, and a speed sensor that detects a traveling speed of the dump truck. A first storage unit that stores route information to the destination, a second storage unit that stores a target travel time from the current position of the dump truck to the destination, the position sensor, the weight sensor, the Based on the speed sensor, the route information stored in the first storage unit, and the target travel time stored in the second storage unit, the fuel consumption is estimated to be reduced. An arithmetic unit that calculates a target speed to be generated, an output unit that generates and outputs a travel operation command according to the calculation result, and the travel operation command output from the output unit of the arithmetic unit. It is characterized by comprising a notification device for notification.

In the invention, the calculation unit of the calculation device may calculate a current position on a travel route from a signal output from the position sensor and the route information stored in the first storage unit. A first calculation unit to be calculated, a current position calculated by the first calculation unit, a second calculation unit for calculating a route to the destination from the route information stored in the first storage unit, and an output from the weight sensor Signal, the target travel time stored in the second storage unit, and the route from the route calculated by the second calculation unit to the destination calculated by the second calculation unit. And a third calculation unit that calculates a target speed in each section.

Further, the present invention is the above invention, wherein the output unit issues a traveling operation command to the driver in the driver's cab based on the target speed calculated by the third calculating unit and a signal output from the speed sensor. It is characterized by creating.

Further, according to the present invention, in the above invention, the notification device includes a first notification unit that notifies a current speed, a second notification unit that notifies the target speed, and a third notification unit that notifies the travel operation command. It is characterized by including.

According to the present invention, since the notification device issues a traveling operation command to the dump truck driver, the driver in the driver's cab may perform the driving operation based on the traveling operation command. Regardless of the skill of the driver, the fuel consumption of the dump truck can be improved and the fuel consumption can be stabilized.

It is a side view showing one embodiment of a dump truck concerning the present invention. It is a block diagram which shows the calculation and alerting | reporting system with which this embodiment is equipped. It is a figure which shows the target speed in each area calculated by the calculation and alerting | reporting system shown in FIG. It is a figure which shows the driving | operation system which reduces the fuel consumption computed by the calculation and alerting | reporting system shown in FIG.

Hereinafter, embodiments of a dump truck according to the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing an embodiment of a dump truck according to the present invention.

As shown in FIG. 1, a dump truck according to an embodiment of the present invention is provided with a frame 1 forming a main body, a wheel 2 composed of a front wheel 2a and a rear wheel 2b, and a vertically rotatable on the frame 1. And a driver's cab 4 arranged on the frame 1. In the present embodiment, a position sensor 5 such as GPS, a weight sensor 6 that measures the weight of a load loaded on the loading platform 3, a speed sensor 7 such as a wheel speed sensor, and an arithmetic device 8 including a computer and the like. And a display device 9 such as a display device.

The weight sensor 6 may indirectly estimate the weight, for example, by measuring the pressure of the suspension provided in the main body frame 1 with a pressure sensor and converting the value into the weight of the load. Further, the dump truck is composed of an existing dump truck, and all or some of the position sensor 5, the weight sensor 6, the speed sensor 7, the arithmetic device 8, and the display device 9 are separately attached to the existing dump truck. Also good.

FIG. 2 is a block diagram showing a calculation / display system provided in the present embodiment.

The computing device 8 provided in this embodiment includes a first storage unit 8a that stores route information to a destination, and a second storage unit 8b that stores a target travel time from the current position of the dump truck to the destination. The first calculation unit 8c that obtains the current position on the travel route from the signal output from the position sensor 5 and the route information stored in the first storage unit 8a, and the current position calculated by the first calculation unit 8c A second calculation unit 8d that calculates a route from the route information stored in the first storage unit 8a to the destination; a signal output from the weight sensor 6; a target travel time recorded in the second storage unit 8b; 3rd calculation part which calculates the target speed estimated that the fuel consumption decreases in each section on the route to the destination calculated by the second calculation part 8d based on the route to the destination calculated by the 2 calculation part 8d 8e and speed sensor 7 And an output unit 8f for outputting a traveling operation command in accordance with the target speed calculated by the signal and the third arithmetic section 8e to be output.

The display device 9 includes a notification unit, that is, a display unit that notifies the traveling operation command output from the output unit 8f of the arithmetic device 8. For example, the display device 9 includes a first notification unit that notifies the current speed, that is, the first display unit 9a, a second notification unit that notifies the target speed, that is, the second display unit 9b, and a third notification unit that notifies the traveling operation command. That is, it includes a third display unit 9c.

FIG. 3 is a diagram showing the target speed in each section calculated by the calculation / notification system shown in FIG.

Suppose that the position of the dump truck is measured by the position sensor 5 at a certain moment as shown in FIG. At this time, the first calculation unit 8c of the calculation device 8 determines that the dump truck is at the point a based on the mine route information stored in the first storage unit 8a.

The second calculation unit 8d determines whether the route to the destination is high or low based on the route information from the current position a determined by the first calculation unit 8c to the destination stored in the first storage unit 8a. It is determined that the route arrives at the destination f via points a, b, c, d, and e. Here, it is assumed that the sections ab, cd, and ef are flat routes, the section bc is an uphill, and the section de is a downhill with an inclination enough to accelerate the dump truck even when traveling away from the accelerator. The second calculation unit 8d calculates the distance and the height difference for each section.

The third calculation unit 8e calculates the speed vr2 in the uphill section bc based on the value of the weight sensor 6. At this time, vr2 is determined based on the height difference between the weight and the section bc so as to be within a speed range that the dump truck can actually deliver. Next, in order to reduce fuel consumption by traveling away from the accelerator, the third arithmetic unit 8e starts deceleration by releasing the accelerator, such as point P before the downhill and point Q before the destination f. The power point is calculated, and the speed vr4 of the section de that is a downhill is calculated in consideration of the acceleration due to the downhill and the speed achievable with the accelerator released. Then, the third calculation unit 8e calculates the speeds vr1, vr3, and vr5 of the remaining flat sections ab, cd, and ef according to the target time T.

FIG. 4 is a diagram showing an operation method for reducing the fuel consumption calculated by the calculation / notification system shown in FIG.

As shown in FIG. 4, when the dump truck is stopped at the destination f, after the dump truck has passed the point Q, the accelerator is released and the vehicle is driven with the inertia of the vehicle. To become the first speed pattern 10a. On the other hand, the speed when the brake is applied at the point R closer to the destination f than the point Q is as shown in the second speed pattern 10b. At this time, the fuel is consumed by stepping on the accelerator from the Q point to the R point in the second speed pattern 10b, whereas the accelerator is not stepped on from the Q point to the destination f in the first speed pattern 10a. No fuel consumption due to conversion. Therefore, the first speed pattern 10a can travel with less fuel consumption than the second speed pattern 10b. Such a method is generally known.

By using such a method, the third calculation unit 8e calculates a target speed that is considered to reduce fuel consumption, and calculates the position of the point Q where the accelerator should be released based on the mechanical energy of the vehicle. To do.

The output unit 8f creates a travel operation command for the driver based on the target speed calculated by the third calculation unit 8e and the signal output from the speed sensor 7. For example, assuming that the current position is point a, the target speed is vr1, and the current speed is V, if vr1> V, a command for accelerating acceleration by stepping on the accelerator is issued, and if vr1 <V, A command for prompting deceleration by releasing the accelerator is issued. When vr1 = V, a command for maintaining the accelerator position is issued.

The output unit 8f issues an instruction to release the accelerator when the dump truck reaches the points P and Q where the accelerator should be released.

The traveling operation command output from the output unit 8f as described above is displayed on the third display unit 9c of the display device 9. The driver may perform the traveling operation while confirming the display on the third display portion 9c. Since the command according to the target travel time to the destination f is displayed on the third display portion 9c, fuel consumption due to excessive depression of the accelerator can be reduced. The above operation is performed at regular intervals to update the travel operation command.

As described above, according to the present embodiment, the display device 9 issues a traveling operation command to the dump truck driver. If the driver performs a driving operation based on the driving change command, fuel consumption due to excessive depression of the accelerator can be reduced regardless of the skill of the driver. Furthermore, since the travel operation command is calculated so that the fuel consumption is optimized, the fuel consumption of the dump truck can be improved and the fuel consumption can be stabilized.

DESCRIPTION OF SYMBOLS 1 Frame 2 Wheel

2a Front wheel

2b Rear wheel 3 Car bed 4 Driver's cab 5 Position sensor 6 Weight sensor 7 Speed sensor 8 Arithmetic device 8a 1st memory | storage part 8b 2nd memory | storage part 8c 1st calculating part 8d 2nd calculating part 8e 3rd calculation 8f Output unit 9 Display device (notification device)
9a 1st display part (1st alerting | reporting part)
9b 2nd display part (2nd alerting | reporting part)
9c 3rd display part (3rd alerting | reporting part)
10 Traveling speed pattern 10a First speed pattern 10b Second speed pattern

Claims

A frame (1) forming a main body, wheels (2), a loading platform (3) provided on the frame (1) so as to be vertically rotatable, and a cab arranged on the frame (1) (4), a position sensor (5) for detecting a traveling position of the dump truck, and a weight sensor (6) for detecting the weight of a load loaded on the loading platform (3). And a speed sensor (7) for detecting the traveling speed of the dump truck,
A first storage unit (8a) that stores route information to the destination, a second storage unit (8b) that stores a target travel time from the current position of the dump truck to the destination, and the position sensor (5) ), The weight sensor (6), the speed sensor (7), the route information stored in the first storage unit (8a), and the target travel time stored in the second storage unit (8b). A calculation unit (8e) having a calculation unit (8e) for calculating a target speed estimated to reduce fuel consumption, and an output unit (8f) for generating and outputting a travel operation command according to the calculation result; ,
A dump truck comprising: a notifying device (9) for notifying the traveling operation command output from the output unit (8f) of the arithmetic device (8).
The dump truck according to claim 1,
The calculation unit (8e) of the calculation device obtains the current position on the travel route from the signal output from the position sensor (5) and the route information stored in the first storage unit (8a). The second calculation for calculating the route to the destination from the first calculation unit (8c), the current position calculated by the first calculation unit (8c), and the route information stored in the first storage unit (8a). Part (8d), a signal output from the weight sensor (6), a target travel time stored in the second storage unit (8b), and a destination calculated by the second calculation unit (8d) A dump truck comprising: a third calculation unit (8e) for calculating a target speed in each section on the route from the route to the destination calculated by the second calculation unit (8d).
The dump truck according to claim 2,
The output unit (8f) travels to the driver in the cab (4) based on the target speed calculated by the third calculation unit (8e) and a signal output from the speed sensor (7). A dump truck characterized by creating an operation command.
The dump truck according to claim 1,
The notification device (9) includes a first notification unit (9a) that notifies the current speed, a second notification unit (9b) that notifies the target speed, and a third notification unit (9c) that notifies the travel operation command. ) And a dump truck.
The dump truck according to claim 2,
The notification device (9) includes a first notification unit (9a) that notifies the current speed, a second notification unit (9b) that notifies the target speed, and a third notification unit (9c) that notifies the travel operation command. ) And a dump truck.
The dump truck according to claim 3,
The notification device (9) includes a first notification unit (9a) that notifies the current speed, a second notification unit (9b) that notifies the target speed, and a third notification unit (9c) that notifies the travel operation command. ) And a dump truck.