WO1989002520A1 - Shoe slip control method and apparatus therefor for caterpillar r vehicle - Google Patents
Shoe slip control method and apparatus therefor for caterpillar r vehicle Download PDFInfo
- Publication number
- WO1989002520A1 WO1989002520A1 PCT/JP1988/000932 JP8800932W WO8902520A1 WO 1989002520 A1 WO1989002520 A1 WO 1989002520A1 JP 8800932 W JP8800932 W JP 8800932W WO 8902520 A1 WO8902520 A1 WO 8902520A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- speed
- slip
- vehicle
- engine output
- acceleration
- Prior art date
Links
Classifications
-
- 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
- E02F9/202—Mechanical transmission, e.g. clutches, gears
-
- 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
- E02F9/2025—Particular purposes of control systems not otherwise provided for
- E02F9/2029—Controlling the position of implements in function of its load, e.g. modifying the attitude of implements in accordance to vehicle speed
-
- 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
- E02F9/24—Safety devices, e.g. for preventing overload
Definitions
- the present invention relates to a method of controlling a slip (crawler slip) of a mounted vehicle such as a bulldozer or a shovel dozer, and particularly to a device for achieving the method.
- a slip crawler slip
- the reference is based on a predetermined limit value of the slip ratio at which the maximum traction force of the vehicle is obtained.
- the present invention relates to a method for controlling a slip slip of a tracked vehicle in which an engine output mode is switched and a device for achieving the method.
- the engine output is transmitted through a power line such as a torque converter, a transmission, a differential, or a final reduction gear. This is done by transmitting to the wheel and thereby driving a track that is wound on the sprocket wheel. Therefore, the traction force of the track can be calculated from the engine output and the power line reduction ratio.
- a power line such as a torque converter, a transmission, a differential, or a final reduction gear.
- the engine output of a tracked vehicle is set to a predetermined value by manual operation using the main control lever.
- the engine output set by the main control lever is reduced by the deceleration pedal pedal operation, and the pedal output is reduced. Is set when you replace it. The specified output has been restored.
- Traction during operation of a tracked vehicle occurs between the track and the ground: related to the rate of slip, up to a certain limit of the rate of slip.
- the higher the slip rate the greater the traction.
- the slip ratio exceeds a predetermined limit, the track only slides, and the engine output of the tracked vehicle is not effectively used as traction, and energy loss is not achieved.
- the adverse effects such as premature wear and early wear of the crawler track occur.
- the load increases during the reeding operation using a blade using a blade by using a bull-by machine, or when using a ripper device
- the load increases.
- the operation is detected by the operator, and the engine output is decreased with the :: step on the discerration pedal.
- reduce the load by operating the work machine as described above to reduce the traction force, thereby performing complicated and complicated operations requiring skill.
- the negative effects of the use slip have been eliminated.
- the operation of the operation slip is controlled by the operation of the operation slip. Since the operation is performed by depressing the operation pedal and operating the work equipment, the operator is cumbersome to operate, requires careful attention, and is substantially shut down. If a slip occurs and the power is turned off, the output of the operator engine will be turned off. It is unavoidable to maintain it for a certain amount of time, and depending on the operator, In short, slips often occur, and it is difficult to achieve the goal of preventing slips. In addition, after the slip has been resolved, loosen the deceleration pedal, or return it to the original position to output the engine in a steady state. I had to return to
- the rotational speed of the drive system is detected, analyzed, and calculated, and based on the result, the governor control lever is moved in multiple stages.
- the engine output does not change in a repetitive manner, and the engine output returns to the steady state when the vehicle slips out of the slip mode. No consideration has been given to letting them do so.
- a vehicle speed detecting means using a Doppler method a vehicle speed detected by the vehicle speed detecting means and a sprocket wheel driving device ⁇ are used.
- the slip ratio is detected based on the detected rotation speed of the sprocket wheel.
- the output slip rate detection means and the detected slip slip rate A signal is output when the detected value exceeds the preset value.
- Work machine operation control means is provided for reduction.
- Such a Doppler speed detection means transmits a microphone mouth wave toward the ground and receives the reflected wave, thereby making the vehicle body ground-absolute, anti-speed, etc.
- snare Chi s house-speed 3 ' ⁇ also der Ru force of that be detected, et al., Ri was Tsu water surface der, and the detection accuracy you Ri was Tsu rough terrain der is that Do unstable both, response time Also, if multiple sensors are nearby, malfunction may occur, and expensive equipment such as spatial filters and laser generators may be used. There is a problem that the cost increases.
- the present invention has been made in view of the circumstances described above, and its purpose is to automatically prevent a crawler belt from jumping beyond a predetermined limit and to increase traction force. To provide effective slip control of a mounted vehicle that can release the operator from complicated and skillful operation-forces. > ⁇
- Another object of the present invention is to ensure that the above method is performed and to provide a relatively inexpensive apparatus.
- the first aspect of the present invention when the slip rate exceeds a predetermined value while working with a tracked vehicle, the engine is switched to a predetermined engine output mode.
- a method of controlling a slip of a tracked vehicle characterized by the following is provided.
- the slip rate in the first aspect is determined by the output rotation speed of the tonnoke converter and the speed step signal. this based on the actual vehicle speed determined Ri by computed track traveling speed and the vehicle speed detecting means Ru is output calculated, 1:. Shi Yu over scan Li of Souto vehicle you characterized knob control A method is provided.
- the engine output mode predetermined in the first aspect is the engine rotation speed, the torque comp.
- a method for controlling a slip of a tracked vehicle characterized in that the method is set based on a theoretical traction force calculated from an output rotation speed and a speed signal, is provided. .
- the vehicle speed detecting means detects the acceleration in the traveling direction of the vehicle, and the useless method for a tracked vehicle is provided.
- a tip control method is provided.
- a vehicle slip detecting device mounted on a vehicle when a vehicle slip detecting device mounted on a vehicle generates a shoo-slip that exceeds a predetermined limit.
- the actual vehicle speed is detected, a slip ratio is calculated based on the detected actual vehicle speed and the theoretical vehicle speed, and the calculated slip ratio is a predetermined value.
- the slip-out of the tracked vehicle including switching the engine output mode from power-off mode to the specified engine output mode, if any A control method is provided.
- an acceleration degree detecting means for detecting an acceleration of a traveling method of a vehicle, and a crawler traveling speed calculating circuit.
- An actual vehicle speed calculation circuit for calculating an actual vehicle speed based on the detected acceleration, and a shuffle for calculating a slip ratio based on the actual vehicle speed and the crawler traveling speed.
- -A slip rate calculation circuit, and an engine output control circuit for switching the engine output mode based on the determined slip rate.
- the present invention provides a track slip vehicle slip slip control device including the following.
- FIG. 1 shows an example of a tracked vehicle in which the control method of the present invention is implemented.
- FIG. 3 is an explanatory diagram in which a schematic side view of an example bulldozer is combined with a schematic configuration diagram of a control device of the present invention;
- Fig. 2 is a schematic diagram showing the power transmission system of a tracked vehicle.
- Fig. 3 is a flowchart showing the calculation process of actual vehicle speed detection.
- Figs. 4 and 5 are graphs showing the relationship between the tractive force characteristics of tracked vehicles and crawling speed, respectively.
- FIG. 6 is a graph showing the change timing of the engine output mode based on the control method of the present invention.
- FIG. 7 is a flowchart showing steps of the control method of the present invention.
- FIG. 8 is an explanatory diagram of the acceleration detecting operation in the control method of the present invention.
- FIGS. 9A to 9D are illustrations of slip acceleration, respectively.
- ' Figure 10 is a flowchart showing the operation steps for calculating the slip rate.
- the bulldozer body 1 has left and right—a pair of crawler tracks 2 and 2 ⁇ Blade 3 is attached and the blade cylinder 4 is mounted.
- the vertical movement is set up by the vertical cylinder, and the vertical swing 5 is moved up and down by the vertical cylinder 6 and the vertical cylinder is mounted by the vertical cylinder 7.
- the engine 9 is controlled by an electronically controlled governor 10.
- the output is controlled by an electronically controlled fuel injection pump 11, and the slot lever is manually operated.
- the engine output is set, and the depressing of the deceleration pedal 1 2: the stroke is detected by the sensor 13, and the stroke is detected. The output is reduced in proportion to the stroke.
- the lift cylinder 6 and the chinole cylinder 7 supply discharge oil from the working machine pump 15 driven by the engine 9 to the working oil tank 16. It is supplied by an operation valve provided in the inside, and is compressed, whereby the lip-spacing 5 penetrates into the ground or rises, thereby causing a re-loading load. Is increased or decreased.
- Fig. 1 As shown in Fig. 1 and Fig. 2, the output side of the engine 9 is a torque converter 17, a transmission 18, a horizontal axis 19, and a left and right steering clutch.
- the brakes 20 and 20 are connected to sprockets 22 and 22 that rotate the left and right crawler belts 2 via the left and right final reduction mechanisms 21 and 21, respectively.
- Engine rotation detection sensor 23 torque converter output rotation sensor 24, variable speed detection sensor 25, and work implement pump pressure sensor 26
- a vehicle longitudinal acceleration sensor 27 is provided, and each sensor is in contact with a controller 28 provided on the vehicle body 1.
- reference numeral 29 denotes a track slip control 0N-0FF switch.
- the controller 28 includes a traction force calculating circuit 30, a crawler traveling speed calculating circuit 31., An actual vehicle speed calculating circuit 32, a slip-slip ratio calculating circuit 33, and an engine. Output control circuit 3 4 etc.
- the traction force calculation circuit 30 calculates the traction force based on the engine speed, the torque converter output speed, and the speed change stage.
- the crawler traveling speed is calculated from the torque converter output rotation speed, the speed change stage, the gear ratio from the transmission to the sprocket, and the sprocket diameter.
- the vehicle speed calculation circuit 32 calculates the vehicle speed from the longitudinal acceleration of the vehicle
- the slip ratio calculation circuit 33 calculates the slip ratio based on the crawler speed and the calculated vehicle speed.
- the engine output control The control circuit 3 4 is designed so that the engine pump pressure is equal to or higher than the set pressure when the shrink ratio is equal to or higher than the specified value. Output the control signal to the electronically controlled governor 10 to set the output to the first and second setting outputs.
- An accelerometer is used as a detection mechanism that is installed in a tracked vehicle and that accurately measures the actual vehicle speed to detect the limit slip slip rate that causes crawling slip. Can be used.
- an accelerometer is attached near the center of gravity of the tracked vehicle to measure the acceleration value in the traveling direction of the vehicle, and the actual vehicle speed is determined by integrating this acceleration value with time.
- the acceleration correction based on the road surface inclination and the vibration acceleration before and after the vehicle body are corrected.
- these supplementary JEs add a method of adding an inclinometer and add a frequency filter. Method or arithmetic processing The method of correction can be adopted.
- Fig. 3 shows an example of the calculation process of actual vehicle speed detection using an accelerometer.
- the slip ratio is calculated from the actual vehicle speed and the theoretical vehicle speed. Assuming that the actual vehicle speed is Vr and the theoretical vehicle speed is Vt, it is possible to obtain the useful rebirth rate I by the following equation.
- the output mode of the engine is set in advance, and when the slip ratio obtained from the actual vehicle speed exceeds a predetermined value, for example, 30% or more.
- a trigger signal such as a trigger signal reaches 0 N
- the engine switches from the output mode to the power-off mode.
- Engine cut off the output to the required value.
- the engine output mode is changed to perform cutoff with high responsiveness. . ⁇
- the slip ratio at that time will be below the specified value as follows.
- crawler slippage is prevented, and other conditions such as theoretical vehicle speed and work machine operation are satisfied, the cut-off mode in engine output mode is achieved.
- -Return to normal mode As a result, the cutoff of the engine output is released, and the engine returns to the output during the normal operation.
- the cut-off is released when the target value of the slip ratio reaches 10%, for example, and the actual vehicle speed is about 25 to 30%. If it recovers, cut off the same way. However, at this time, it is possible to set a restriction condition such as the vehicle speed, whether or not the work machine is operated, etc., so that the return can be stopped or the timing can be shifted.
- a restriction condition such as the vehicle speed, whether or not the work machine is operated, etc.
- the engine output is set to a basic mode different from the normal mode during the rebating operation.
- the tractive force characteristics are shown in Fig. 4.
- the basic mode tractive force characteristic B is different from the tractive force characteristic A at normal forward first speed.
- Fig. 5 shows the tractive force characteristics C and D of the first and second engine output modes obtained by translating the tractive force characteristics B in the basic mode.
- the pump slip pressure is equal to or higher than the set pressure when the slip ratio is equal to or higher than the predetermined value (that is, when the operation valve is switched to the lift cylinder). 6)
- the traction force is the same and the crawler traveling speed is reduced.
- the pressure is lower than the pressure (that is, when the lip shock 5 is not operated without switching the operation valve)
- the traction force decreases and the crawler traveling speed decreases.
- the working machine pump pressure is 0.5. The pressure is switched when the pressure becomes higher or lower than the second set pressure.
- the acceleration is based on the vehicle speed as shown in Fig. 8.
- the controller 2S calculates the slip acceleration in 0.0! 3 seconds according to the following equation.
- Fig. 9A the crawler track suddenly slips when the load exceeds a certain value, and the slip The slip ratio increases, and as shown in Fig. 9B, it is expressed as a short wave at 0.5 ⁇ : 1. O sec, as 0, 1 ⁇ 0.3G.
- the rate of increase in slip acceleration when tilting 35 degrees in one second is 0.6 Gs, and the force becomes 0.03 G in 0.05 seconds.
- the slip acceleration will change to the acceleration due to the slip or the slope as shown by the dotted line. It is possible to judge whether the acceleration is due to this.
- the slip ratio S is calculated by the slip ratio calculation circuit 33. It is calculated as follows.
- the following means can be used. That is, in the actual vehicle speed detection step, it is possible to directly detect the actual vehicle speed by using a space fin- olator or a docker sensor. In addition, the input / output rotation ratio of the torque converter in the power line of the tracked vehicle, or the operation of the switch button by the operator or the dial set Can be used.
- the electronic control of the engine is performed according to the analog control according to the cut-off ratio. Can also be achieved by adjusting the banana.
- the operator Press the return button to the right or select the point at which the engine output cutoff is released based on the relationship between the vehicle speed and the traction force. You can also return to the normal mode when matching.
- the fuel efficiency of the tracked vehicle is reduced.
- the wear of each part of the suspension structure is reduced (S is reduced and the durability is improved.
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Operation Control Of Excavators (AREA)
Description
Claims
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23082687A JPS6473142A (en) | 1987-09-14 | 1987-09-14 | Shoe slip control method for crawler vehicle |
JP62/230826 | 1987-09-14 | ||
JP23111687A JPS6475724A (en) | 1987-09-17 | 1987-09-17 | Prevention of crawler slip in bulldozer with ripper device |
JP62/231116 | 1987-09-17 | ||
JP62/231115 | 1987-09-17 | ||
JP23111587A JPH07107278B2 (ja) | 1987-09-17 | 1987-09-17 | ブルドーザの履帯スリップ検知装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1989002520A1 true WO1989002520A1 (en) | 1989-03-23 |
Family
ID=27331695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1988/000932 WO1989002520A1 (en) | 1987-09-14 | 1988-09-14 | Shoe slip control method and apparatus therefor for caterpillar r vehicle |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0383913A4 (ja) |
WO (1) | WO1989002520A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0378686A1 (en) * | 1988-05-16 | 1990-07-25 | Kabushiki Kaisha Komatsu Seisakusho | Adaptive engine output mode setting method based on shoe slip |
AU640425B2 (en) * | 1989-11-17 | 1993-08-26 | Kabushiki Kaisha Komatsu Seisakusho | Method and system of preventing wheel loader from slipping |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56131721A (en) * | 1980-03-18 | 1981-10-15 | Komatsu Ltd | Load controller for working machine |
JPS56135638A (en) * | 1980-03-25 | 1981-10-23 | Komatsu Ltd | Load controller for working machine |
JPS58123932A (ja) * | 1982-01-18 | 1983-07-23 | Caterpillar Mitsubishi Ltd | 土工車輌のスリツプ自動補正装置 |
JPS58175404A (ja) * | 1982-03-22 | 1983-10-14 | デイ−ア・アンド・カンパニ− | 車輌及びその制御系統 |
JPS60245859A (ja) * | 1984-05-17 | 1985-12-05 | Caterpillar Mitsubishi Ltd | ガバナコントロ−ルレバ−制御装置 |
JPS61155524A (ja) * | 1984-12-27 | 1986-07-15 | Hitachi Constr Mach Co Ltd | 車輪式掘削積込機の油圧回路 |
JPH0615785B2 (ja) * | 1985-09-06 | 1994-03-02 | 積水化学工業株式会社 | ユニット建物 |
-
1988
- 1988-09-14 WO PCT/JP1988/000932 patent/WO1989002520A1/ja not_active Application Discontinuation
- 1988-09-14 EP EP19880908325 patent/EP0383913A4/en not_active Ceased
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56131721A (en) * | 1980-03-18 | 1981-10-15 | Komatsu Ltd | Load controller for working machine |
JPS56135638A (en) * | 1980-03-25 | 1981-10-23 | Komatsu Ltd | Load controller for working machine |
JPS58123932A (ja) * | 1982-01-18 | 1983-07-23 | Caterpillar Mitsubishi Ltd | 土工車輌のスリツプ自動補正装置 |
JPS58175404A (ja) * | 1982-03-22 | 1983-10-14 | デイ−ア・アンド・カンパニ− | 車輌及びその制御系統 |
JPS60245859A (ja) * | 1984-05-17 | 1985-12-05 | Caterpillar Mitsubishi Ltd | ガバナコントロ−ルレバ−制御装置 |
JPS61155524A (ja) * | 1984-12-27 | 1986-07-15 | Hitachi Constr Mach Co Ltd | 車輪式掘削積込機の油圧回路 |
JPH0615785B2 (ja) * | 1985-09-06 | 1994-03-02 | 積水化学工業株式会社 | ユニット建物 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0378686A1 (en) * | 1988-05-16 | 1990-07-25 | Kabushiki Kaisha Komatsu Seisakusho | Adaptive engine output mode setting method based on shoe slip |
EP0378686A4 (en) * | 1988-05-16 | 1991-03-20 | Kabushiki Kaisha Komatsu Seisakusho | Adaptive engine output mode setting method based on shoe slip |
US5333479A (en) * | 1988-05-16 | 1994-08-02 | Kabushiki Kaisha Komatsu Seisakusho | Adaptive engine output mode setting method based on shoe slip |
AU640425B2 (en) * | 1989-11-17 | 1993-08-26 | Kabushiki Kaisha Komatsu Seisakusho | Method and system of preventing wheel loader from slipping |
Also Published As
Publication number | Publication date |
---|---|
EP0383913A4 (en) | 1991-03-13 |
EP0383913A1 (en) | 1990-08-29 |
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