WO1998045132A1 - Bogie control system for a hydraulic-motor driven vehicle - Google Patents

Bogie control system for a hydraulic-motor driven vehicle Download PDF

Info

Publication number
WO1998045132A1
WO1998045132A1 PCT/FI1998/000287 FI9800287W WO9845132A1 WO 1998045132 A1 WO1998045132 A1 WO 1998045132A1 FI 9800287 W FI9800287 W FI 9800287W WO 9845132 A1 WO9845132 A1 WO 9845132A1
Authority
WO
WIPO (PCT)
Prior art keywords
bogie
wheel
control system
hydraulic
foremost
Prior art date
Application number
PCT/FI1998/000287
Other languages
French (fr)
Inventor
Kyösti REPONEN
Original Assignee
Tume Oy
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 Tume Oy filed Critical Tume Oy
Priority to AU67329/98A priority Critical patent/AU6732998A/en
Publication of WO1998045132A1 publication Critical patent/WO1998045132A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/0152—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G5/00—Resilient suspensions for a set of tandem wheels or axles having interrelated movements
    • B60G5/04—Resilient suspensions for a set of tandem wheels or axles having interrelated movements with two or more pivoted arms, the movements of which are resiliently interrelated, e.g. the arms being rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/30—Rigid axle suspensions
    • B60G2200/318—Rigid axle suspensions two or more axles being mounted on a longitudinal rocking or walking beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/40—Indexing codes relating to the wheels in the suspensions
    • B60G2200/422—Driving wheels or live axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/40—Type of actuator
    • B60G2202/41—Fluid actuator
    • B60G2202/413—Hydraulic actuator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/128—Damper mount on vehicle body or chassis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2300/00—Indexing codes relating to the type of vehicle
    • B60G2300/02—Trucks; Load vehicles
    • B60G2300/026—Heavy duty trucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/01—Attitude or posture control
    • B60G2800/014—Pitch; Nose dive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/18—Starting, accelerating
    • B60G2800/182—Traction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/21—Traction, slip, skid or slide control
    • B60G2800/214—Traction, slip, skid or slide control by varying the load distribution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/90—System Controller type
    • B60G2800/95—Automatic Traction or Slip Control [ATC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/90—System Controller type
    • B60G2800/95—Automatic Traction or Slip Control [ATC]
    • B60G2800/952—Electronic driving torque distribution

Definitions

  • the present invention relates to a bogie control system for a hydraulic-motor driven vehicle, as set forth in the preamble of claim 1.
  • each wheel being differentiated with a distributor valve or equipped with its own pump for driving independently of each other, one or more wheels losing contact with the ground only decreases the driving power on its own part. If all drive motors are in a common circuit, the loss of contact by one motor stops the advancement completely. Oftentimes, the vehicles are provided with bogies or trucks on one or both axles.
  • One of the features of a bogie is that, in a driving condition, the foremost wheel of the bogie tends to lose weight or come off the ground. Upon rising off the ground, the foremost wheel is running loose, the pressure "escaping" from the foremost wheel's pressure line, while the distributor valve makes sure that the pressure in the rearmost wheel's pressure line does not disappear anywhere. As for this particular bogie, however, the driving power drops to a half. On flat terrain, the demand of driving power being low, there are no special problems, but in snow, treacherous ground, and climbs "the tipping" of a bogie is undesirable.
  • an object of the present invention is to provide a bogie control system for eliminating the above drawback.
  • a bogie control system of the invention is characterized by what is set forth in the characterizing clause of claim 1.
  • fig. 1 shows schematically one bogie equipped with a bogie control system of the invention
  • fig. 2 shows one example of a hydraulic diagram for a bogie control system of the invention.
  • reference numeral 9 designates the foremost wheel of a bogie and reference numeral 10 the rearmost wheel of a bogie.
  • Reference numeral 2 in turn indicates a cylinder included in a bogie control system of the invention, which can be used for delivering pressure on the wheel 9 foremost in the driving direction so as to maintain the driving power as high as possible.
  • the cylinder 2 can be a separate or pre-existing bogie control cylinder.
  • the cylinder 2 is supplied with pressure from the pressure line of a motor 8b (fig. 2) serving the rearmost bogie wheel 10, whereby an increase in the driving pressure increases also the counter-moment produced by the cylinder.
  • the cylinder can be designed for pulling or pushing.
  • reference numeral M1 indicates a moment produced by a foremost motor 8a
  • reference numeral M2 a moment produced by the rearmost motor 8b
  • reference numeral M3 a moment produced by the moments M1 + M2 on a bogie
  • reference numeral M4 a counter-moment from the cylinder on the bogie.
  • Fig. 2 illustrates a hydraulic diagram for a bogie control system of the invention.
  • the hydraulic diagram is depicted in the condition, wherein the bogie pressurizing automatics is not in use.
  • the bogie is controlled by means of a valve block or it is in a "floating" condition.
  • reference numeral 8a designates a motor for the foremost bogie wheel 9
  • reference numeral 8b a motor for the rearmost bogie wheel 10.
  • valves 4 and 5 assume a position towards an electric coil.
  • a pump 1 delivers a driving pressure which progresses to a gate A in a pole motor.
  • valve 3 does not admit the return oil into a closed system and, as the pressure has grown to be about 20 bar higher than the driving pressure, a valve 6 will open and the return oil discharges into a hydraulic fluid tank through an appropriate valve (not shown).
  • the valve 6 closes.
  • the cylinder will retain a pressure of about 20 bar for pressing the front bogie wheel 9 against the ground until the valves 4 and 5 are released electrically.
  • the bogies are in a floating condition or individually controllable by means of a valve block.
  • the relationship between a moment produced by the drive and a counter-moment produced by the cylinder 2 can be worked out either by dimensioning the diameters of the bogie control cylinders for a correct ratio or by using a relief valve 7.
  • the bogie control system of the invention can be used for providing automatic bogie control over a bogie, which automatically provides a maximal grip for both wheels of a bogie on the base thereof.
  • the system is applicable to all fully hydrostatic transmissions equipped with a bogie.
  • the system can be designed to be functional for driving in both directions.
  • the pressure required by the cylinder 2 has been extracted from the pressure line of the rearward motor 8b, but the invention can also be implemented by delivering the pressure required by the cylinder 2 from a pressure line external of the pressure line of the motors 8a, 8b, the pressure increase in the pressure line of the rear motor 8b in a driving situation being used for producing a necessary control signal for using an external pressure line.

Abstract

The invention relates to a bogie control system for a hydraulic-motor driven vehicle, wherein each bogie wheel (9, 10) is provided with its own hydraulic motor whereby, in a driving situation, wheel motors (8a, 8b) produce a bogie tipping moment (M3) which urges to raise the wheel (9) foremost in the driving direction. The system of the invention includes a hydraulic cylinder (2) mounted on the bogie for producing a counter-moment (M4) to the moment (M3) lifting up the foremost wheel (9) in such a way that the foremost wheel (9) returns to drive.

Description

Bogie control system for a hydraulic-motor driven vehicle
The present invention relates to a bogie control system for a hydraulic-motor driven vehicle, as set forth in the preamble of claim 1.
In fully hydrostatic drive, each wheel being differentiated with a distributor valve or equipped with its own pump for driving independently of each other, one or more wheels losing contact with the ground only decreases the driving power on its own part. If all drive motors are in a common circuit, the loss of contact by one motor stops the advancement completely. Oftentimes, the vehicles are provided with bogies or trucks on one or both axles. One of the features of a bogie is that, in a driving condition, the foremost wheel of the bogie tends to lose weight or come off the ground. Upon rising off the ground, the foremost wheel is running loose, the pressure "escaping" from the foremost wheel's pressure line, while the distributor valve makes sure that the pressure in the rearmost wheel's pressure line does not disappear anywhere. As for this particular bogie, however, the driving power drops to a half. On flat terrain, the demand of driving power being low, there are no special problems, but in snow, treacherous ground, and climbs "the tipping" of a bogie is undesirable.
Hence, an object of the present invention is to provide a bogie control system for eliminating the above drawback. In order to achieve this object, a bogie control system of the invention is characterized by what is set forth in the characterizing clause of claim 1.
The invention will now be described in more detail with reference made to the accompanying drawings, in which:
fig. 1 shows schematically one bogie equipped with a bogie control system of the invention, and
fig. 2 shows one example of a hydraulic diagram for a bogie control system of the invention. In fig. 1 , reference numeral 9 designates the foremost wheel of a bogie and reference numeral 10 the rearmost wheel of a bogie. Reference numeral 2 in turn indicates a cylinder included in a bogie control system of the invention, which can be used for delivering pressure on the wheel 9 foremost in the driving direction so as to maintain the driving power as high as possible. The cylinder 2 can be a separate or pre-existing bogie control cylinder. In the depicted embodiment, the cylinder 2 is supplied with pressure from the pressure line of a motor 8b (fig. 2) serving the rearmost bogie wheel 10, whereby an increase in the driving pressure increases also the counter-moment produced by the cylinder. The cylinder can be designed for pulling or pushing.
Additionally in fig. 1 , reference numeral M1 indicates a moment produced by a foremost motor 8a, reference numeral M2 a moment produced by the rearmost motor 8b, reference numeral M3 a moment produced by the moments M1 + M2 on a bogie, and reference numeral M4 a counter-moment from the cylinder on the bogie.
As the pressure increases in the pressure line of a motor in a driving situation, the moment M1 + M2 produced by the motor results in a moment M3, which tips the bogie and raises the bogie wheel 9 foremost in the driving direction. By delivering the pressure from the pressure line of the rearmost bogie motor 8b to the bogie control cylinder for producing a moment M4, the foremost bogie wheel 9 can be returned to drive. If M4 strives to become sufficiently high to lift off the rearmost bogie wheel 10, the pressure in the pressure line of the rearmost wheel motor will drop and the cylinder pressure will also drop and the moment M4 will go down. At this point, the bogie returns again to driving with both wheels.
The relationships between moments must be worked out in such a way that M4 is higher than M1 or M2 but lower than M1 + M2.
Fig. 2 illustrates a hydraulic diagram for a bogie control system of the invention. The hydraulic diagram is depicted in the condition, wherein the bogie pressurizing automatics is not in use. Thus, the bogie is controlled by means of a valve block or it is in a "floating" condition. In the diagram, reference numeral 8a designates a motor for the foremost bogie wheel 9 and reference numeral 8b a motor for the rearmost bogie wheel 10. When the bogie control automatics is switched on electrically, valves 4 and 5 assume a position towards an electric coil. A pump 1 delivers a driving pressure which progresses to a gate A in a pole motor. From the same line is extracted through a throttle and a counter-valve 3 a small (less than 20 l/min) volume flow to the bogie control cylinder 2 for pressing the foremost wheel 9 onto the ground. The volume flow is worked out in such a way that, in all situations, the closed-system feed pump has an output sufficient for maintaining the system in working order. If such a large amount of oil is required by the cylinder that there is not enough time for the throttle to fill the cylinder, the cylinder will receive its filling through the valve 5, said valve 5 being connected to a tank of hydraulic fluid.
As the bogie starts climbing without any obstacles, there is oil flowing from the rod side of the cylinder 2 towards the system. The valve 3 does not admit the return oil into a closed system and, as the pressure has grown to be about 20 bar higher than the driving pressure, a valve 6 will open and the return oil discharges into a hydraulic fluid tank through an appropriate valve (not shown). As the obstacle or terrain changes in such a way that the pressure in the cylinder 2 falls down to the driving pressure, the valve 6 closes. Upon stopping the drive, the cylinder will retain a pressure of about 20 bar for pressing the front bogie wheel 9 against the ground until the valves 4 and 5 are released electrically. At that point, the bogies are in a floating condition or individually controllable by means of a valve block.
The relationship between a moment produced by the drive and a counter-moment produced by the cylinder 2 can be worked out either by dimensioning the diameters of the bogie control cylinders for a correct ratio or by using a relief valve 7.
The bogie control system of the invention can be used for providing automatic bogie control over a bogie, which automatically provides a maximal grip for both wheels of a bogie on the base thereof. The system is applicable to all fully hydrostatic transmissions equipped with a bogie. The system can be designed to be functional for driving in both directions.
In the depicted embodiment, the pressure required by the cylinder 2 has been extracted from the pressure line of the rearward motor 8b, but the invention can also be implemented by delivering the pressure required by the cylinder 2 from a pressure line external of the pressure line of the motors 8a, 8b, the pressure increase in the pressure line of the rear motor 8b in a driving situation being used for producing a necessary control signal for using an external pressure line.

Claims

Claims
1. A bogie control system for a hydraulic-motor driven vehicle, wherein each bogie wheel (9, 10) is provided with its own hydraulic motor whereby, in a driving situation, wheel motors (8a, 8b) produce a bogie tipping moment (M3) which urges to raise the wheel (9) foremost in the driving direction, characterized in that the system includes a hydraulic cylinder (2) mounted on the bogie for producing a counter-moment (M4) to the moment (M3) lifting up the foremost wheel (9) in such a way that the foremost wheel (9) returns to drive, and that the control system is adapted to automatically maintain also the rearmost wheel in drive.
2. A control system as set forth in claim 1 , characterized in that the pressure required by the cylinder (2) is delivered from the pressure line of the rearmost motor (8b).
3. A control system as set forth in claim 1 , characterized in that the pressure required by the cylinder (2) is delivered from a pressure line external of the pressure line of the motors (8a, 8b).
PCT/FI1998/000287 1997-04-04 1998-04-01 Bogie control system for a hydraulic-motor driven vehicle WO1998045132A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU67329/98A AU6732998A (en) 1997-04-04 1998-04-01 Bogie control system for a hydraulic-motor driven vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI971392 1997-04-04
FI971392A FI971392A (en) 1997-04-04 1997-04-04 Undercarriage control system for hydraulic motor driven vehicles

Publications (1)

Publication Number Publication Date
WO1998045132A1 true WO1998045132A1 (en) 1998-10-15

Family

ID=8548538

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1998/000287 WO1998045132A1 (en) 1997-04-04 1998-04-01 Bogie control system for a hydraulic-motor driven vehicle

Country Status (3)

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AU (1) AU6732998A (en)
FI (1) FI971392A (en)
WO (1) WO1998045132A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1422080A1 (en) * 2002-11-19 2004-05-26 NAF Neunkirchener Achsenfabrik AG Device for regulating the position of a tandem axle
EP1712381A1 (en) * 2005-04-15 2006-10-18 NAF Neunkirchener Achsenfabrik AG Device and method for stepless regulation of the position of a tandem axle
DE102016207012A1 (en) 2016-04-05 2017-10-05 Robert Bosch Gmbh Hydrostatic drive for a tandem axle of a vehicle
US11021032B2 (en) 2019-04-23 2021-06-01 Deere & Company Bogie balancing system and method for a work machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056158A (en) * 1975-04-16 1977-11-01 Minister Of Agriculture, Fisheries & Food, In Her Britanic Majesty's Government Of The U.K. Of Great Britain & N. Ireland Rough terrain vehicles
US4462477A (en) * 1982-11-15 1984-07-31 International Harvester Co. Tractor bogie suspension with steering and weight transfer control
DE19616405A1 (en) * 1996-04-24 1997-10-30 Neunkirchener Maschinen Und Ac Device for preventing lifting of wheels in tandem axle of forestry vehicle or construction machinery operating on difficult terrain

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056158A (en) * 1975-04-16 1977-11-01 Minister Of Agriculture, Fisheries & Food, In Her Britanic Majesty's Government Of The U.K. Of Great Britain & N. Ireland Rough terrain vehicles
US4462477A (en) * 1982-11-15 1984-07-31 International Harvester Co. Tractor bogie suspension with steering and weight transfer control
DE19616405A1 (en) * 1996-04-24 1997-10-30 Neunkirchener Maschinen Und Ac Device for preventing lifting of wheels in tandem axle of forestry vehicle or construction machinery operating on difficult terrain

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1422080A1 (en) * 2002-11-19 2004-05-26 NAF Neunkirchener Achsenfabrik AG Device for regulating the position of a tandem axle
EP1712381A1 (en) * 2005-04-15 2006-10-18 NAF Neunkirchener Achsenfabrik AG Device and method for stepless regulation of the position of a tandem axle
DE102016207012A1 (en) 2016-04-05 2017-10-05 Robert Bosch Gmbh Hydrostatic drive for a tandem axle of a vehicle
US11021032B2 (en) 2019-04-23 2021-06-01 Deere & Company Bogie balancing system and method for a work machine

Also Published As

Publication number Publication date
AU6732998A (en) 1998-10-30
FI971392A0 (en) 1997-04-04
FI971392A (en) 1998-10-05

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