EP2753524A1 - Verfahren zum bestimmen einer wirksamen menge eines adhäsionssteigernden mittels - Google Patents
Verfahren zum bestimmen einer wirksamen menge eines adhäsionssteigernden mittelsInfo
- Publication number
- EP2753524A1 EP2753524A1 EP12756719.6A EP12756719A EP2753524A1 EP 2753524 A1 EP2753524 A1 EP 2753524A1 EP 12756719 A EP12756719 A EP 12756719A EP 2753524 A1 EP2753524 A1 EP 2753524A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rail
- wheel
- adhesion
- effective amount
- determining
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000001419 dependent effect Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 7
- 239000003795 chemical substances by application Substances 0.000 description 26
- 239000004576 sand Substances 0.000 description 16
- 238000011161 development Methods 0.000 description 7
- 230000018109 developmental process Effects 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 6
- 238000004590 computer program Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005283 ground state Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C15/00—Maintaining or augmenting the starting or braking power by auxiliary devices and measures; Preventing wheel slippage; Controlling distribution of tractive effort between driving wheels
- B61C15/08—Preventing wheel slippage
- B61C15/10—Preventing wheel slippage by depositing sand or like friction increasing materials
- B61C15/107—Preventing wheel slippage by depositing sand or like friction increasing materials with electrically or electromagnetically controlled sanding equipment
Definitions
- the invention relates to a method for determining an effective amount of an adhesion-promoting agent, a method for applying an adhesion-increasing agent between a wheel of a rail vehicle and a rail, a control device for performing one of the methods and a rail vehicle with the control device.
- a control unit for a rail vehicle which calculates a required amount of sand to be scattered between a wheel of the rail vehicle and a rail on which the rail vehicle travels in order to achieve a required deceleration of the rail vehicle. It is an object of the invention to improve the known method for slowing down a rail vehicle by means of spreading of adhesion-increasing means.
- a method of determining an effective amount of an adhesion-promoting agent applied between a wheel of a rail vehicle and a rail on which the wheel is traveling comprises the steps of:
- the specified method is based on the consideration that for a required deceleration of a rail vehicle, an amount of adhesion-increasing means is necessary, that also arrives at the wheel of the rail vehicle.
- the adhesion-increasing means output from a metering device can not completely arrive at the wheel because it is blown, for example, by the travel wind of the rail vehicle.
- the basic friction between the wheel and the rail can be calculated at least based on a model of the rail.
- the model can be stored in a computer in a computational manner and updated based on current state variables of the rail and / or the environment around the rail. In this way, the basic friction of the rail can be detected without a direct measurement.
- the model includes a state of the rail.
- a condition of the rail should be understood to mean temporally variable properties of the rail. Under these temporally variable properties, for example, aging phenomena, such as rust fall. These temporally variable properties could be measured and taken into account in the rail model.
- the model comprises a coating on the rail. Such coverings can be, for example, settling precipitates or soiling, which can settle for example due to drifts on the rail. These coverings change the basic friction of the rail to increase adhesion or reduce adhesion and can be detected by measurement in a manner known to the person skilled in the art and taken into account in the model.
- the model comprises a normal force acting on the rail via the wheel.
- This normal force is particularly favorable when the aforementioned coverings are taken into account, because the normal force has an influence on how deep the wheel is pressed into a covering.
- the normal force for example, be dependent on a payload of the rail vehicle and thus also be detected by measurement.
- the basic friction between the wheel and the rail is dependent on a temperature of the rail.
- the temperature of the rail has an influence on the material properties of the rail and thus a direct influence on the adhesion between wheel and rail.
- the basic friction between the wheel and the rail is dependent on ambient conditions around the wheel and the rail. For example, these environmental conditions can directly influence the condition of the rail.
- the ambient conditions include a humidity and / or an air temperature, which may have an influence on the above-mentioned coating on the rail, for example, so that it may not have to be detected by measurement itself.
- a method of applying an adhesion-enhancing agent between a wheel of a rail vehicle and a rail on which the rail vehicle travels comprises the steps of:
- the stated method is based on the finding that the amount of adhesion-promoting agent arriving at the wheel, which is necessary for a specific deceleration of the rail vehicle, can be regulated by the amount of adhesion-increasing agent arriving at the wheel.
- the amount of adhesion-enhancing agent that is to arrive at the wheel can now be used directly as the reference variable of this control circuit.
- the desired delay could be used as a reference variable, it is recognized in the context of the specified method that the time response of such a control loop (as in space heating) is very slow, which can lead to an unnecessarily high amount of applied adhesion-promoting agent, because the control loop settles very slowly. Direct control of the amount of adhesion-promoting agent to be applied to the rail improves the timing and allows the control loop to settle faster and respond to changes.
- the adhesion-promoting agent to be applied may also be applied to the splint in a regulated manner over the course of time using the stated method. If, for example, the adhesion-promoting agent is initially to be jerky and subsequently only with a low mass flow, then only the necessary amount of adhesion-promoting agent would be displayed in a correspondingly time-variable manner. This would be impossible with a loop in which the desired delay is controlled directly.
- the adhesion-increasing agent can be dispensed from the metering device in different particle types, particle sizes and / or particle sizes. This means that the amount of adhesion-promoting agent need not be influenced solely by an amount of particles of the adhesion-promoting agent.
- the adhesion-increasing agent is dispensed from the metering device in one part of the particle per route.
- a control device is set up to carry out one of the specified methods.
- the control device can in particular be extended in such a way that it is set up to carry out a method according to one of the subclaims.
- the specified device has a memory and a processor.
- the specified method is stored in the form of a computer program in the memory and the processor is provided for carrying out the method when the computer program is loaded from the memory into the processor.
- a computer program comprises program code means for performing all the steps of one of the specified methods when the computer program is executed on a computer or one of the specified devices.
- a computer program product includes program code stored on a computer-readable medium and, when executed on a data processing device, performs one of the specified methods.
- a rail vehicle comprises one of the specified control devices.
- FIG. 1 is a schematic representation of a control loop for controlling an adhesion-promoting agent to be applied to a rail; and FIG. 2 is a structural diagram for determining an effective amount of adhesion-promoting agent on the rail.
- FIG. 1 is a schematic representation of a control circuit 2 for controlling an adhesion-increasing agent 6 to be applied to a rail 4.
- adhesive-increasing means 6 sand 6 will be considered below by way of example.
- the sand 6 is spread in the present embodiment from a metering device 8 on the rail 4, wherein the metering device 8 is acted upon by a compressed air source 10 with an actual pressure 12 to scatter the sand 6.
- This loading of the metering device 8 with the actual pressure 12 will be discussed in more detail later.
- the sand 6 is sprinkled in the present embodiment between a wheel 14 and the rail 4 to increase adhesion between the wheel 14 and the rail 4.
- the wheel 14 is part of a not further shown rail vehicle that is moved on the wheel 14 on the rail 4 and can be braked by a brake 16, which in turn leads to a braking force 18 on the wheel 14 and thus on the rail vehicle, not shown.
- a coating 20 may be formed, which may form, for example due to impurities such as leaves or fallen soil or due to moisture.
- the wheel 14 is pressed into this pad 20 due to a force acting on the wheel 14 normal force 22 in the pad 20, resulting in the location of the wheel 14 to a not further referenced reduced thickness of the pad 20.
- the wheel 14 moves over the rail 4 at a speed 24 which can be determined on the wheel 14 directly or via the rail vehicle not shown. From this speed 24, a delay 28 of the wheel 14 can be determined in a differentiating member 26.
- the effective amount 38 of sand 6, which reaches the wheel 14 from the metering device 8 and thus has an influence on the actual friction value 32 is calculated in a kneading amount calculating device 36 in a manner known to those skilled in the art.
- the basic idea of the effective amount calculation device 36 is to use a difference (not shown) between the actual friction value 32 and a base friction value 40 as a basis for calculating the effective amount 38 of sand 6 that arrives at the wheel 14. This difference is dependent on the amount of action 38, wherein this dependence can be determined, for example, by tests and stored as a characteristic in the effective amount calculation device 36.
- the base friction coefficient 40 can be calculated, for example, in a modeling device 42 and output to the effective amount calculation device 36.
- a mathematical model can be stored in the modeling device 42 that simulates the Grundreibwert 40 as a coefficient of friction between the wheel 14 and the rail 4 without sand 6 is scattered therebetween.
- This model could, for example, include only the model of the rail 4 or additionally take into account the wheel.
- a parameter in this model could be a Temperature 44 of the rail 4, an ambient temperature 46 around the rail 4 and the wheel 14, an ambient humidity 48 around the rail 4 and the wheel 14 and an aging state 50 are taken into account, for example, indicates the extent to which a rust layer has set on the rail 4.
- the model can be determined analogously to the effective amount calculation device 36 by tests and stored in the form of one or more characteristics in the modeling device 42.
- the active amount 38 of sand 6 can then be supplied to a control device 52, which in a manner known to those skilled in the art, will arrive at a set amount 54 of sand 6 which is to arrive at the wheel 14 in order to produce a specific desired adhesion between the wheel 14 and the rail 4 that opposes effect quantity 38 and generates a corresponding volume controller output signal 56 based on a deviation of the effective quantity 38 and the setpoint quantity 54.
- the flow regulator output signal 56 is then used as a setpoint pressure 56 for a pressure control device 58, which generates a pressure regulator output signal 60 based on a deviation between the aforementioned actual pressure 12 and the target pressure 56 and thus controls a valve 62 for adjusting the actual pressure 12 as an actuator.
- FIG. 2 shows a structure diagram for determining an effective amount 38 of sand 6 on the rail 4.
- a discharge amount 64 of sand 6 is scattered onto the rail 4, from which the effective amount 38 arrives at the wheel 14 due to an efficiency 66 influenced by, for example, driving wind drifts.
- the effective amount 38 leads due to a frictional engagement 68 between the wheel 14 and rail 4 to the actual coefficient of friction 32, which causes in conjunction with the normal force 22 and without further intervention by the brake 16, the braking force 18 to the wheel 14.
- the actual friction value 32 is compared with the base friction value 40 from the modeling device 42 and the previously unknown effective amount 38 of sand 6 is calculated in the manner already described.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
- Transmissions By Endless Flexible Members (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011112969.7A DE102011112969B4 (de) | 2011-09-09 | 2011-09-09 | Partikelstreuanlage für ein Schienenfahrzeug |
PCT/EP2012/067549 WO2013034717A1 (de) | 2011-09-09 | 2012-09-07 | Verfahren zum bestimmen einer wirksamen menge eines adhäsionssteigernden mittels |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2753524A1 true EP2753524A1 (de) | 2014-07-16 |
EP2753524B1 EP2753524B1 (de) | 2019-06-19 |
Family
ID=46829754
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12756719.6A Active EP2753524B1 (de) | 2011-09-09 | 2012-09-07 | Verfahren zum bestimmen einer wirksamen menge eines adhäsionssteigernden mittels |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2753524B1 (de) |
CN (1) | CN103796896B (de) |
DE (1) | DE102011112969B4 (de) |
WO (1) | WO2013034717A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012002929A1 (de) | 2012-02-14 | 2013-08-14 | Jürgen Lewald | Minimalinvasives Verfahren für die Diagnose und die Therapieverlaufskontrolle der Endometriose |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013016135B4 (de) * | 2013-09-27 | 2019-07-18 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Vorrichtung und Verfahren zum Verbessern eines Haftwerts zwischen einem Rad und einer Schiene für ein Schienenfahrzeug |
DE102013016881A1 (de) * | 2013-10-11 | 2015-04-16 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Ausbringeinrichtung für Reibwertmodifikatoren für ein Schienenfahrzeug |
AT520813B1 (de) * | 2018-03-05 | 2019-08-15 | Nowe Gmbh | Vorrichtung und Verfahren zur Austragung einer reibwertoptimierenden Mischung in den Spalt zwischen Schienenrad eines Schienenfahrzeuges und Schiene |
DE102018209920B3 (de) * | 2018-06-19 | 2019-07-11 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Verfahren zur Prognose eines Haftwerts in einem Kontaktpunkt zwischen einem Rad eines Schienenfahrzeugs und der Schiene, Verfahren zur Verbesserung des Haftwertes in einem Kontaktpunkt zwischen einem Rad eines Schienenfahrzeugs und der Schiene und Vorrichtung zur Durchführung der Verfahren |
CN110884522B (zh) * | 2019-12-12 | 2020-09-15 | 东阳韵源自动化科技有限公司 | 一种安装在火车底部的火车制动器 |
DE102020104216A1 (de) * | 2020-02-18 | 2021-08-19 | Knorr-Bremse Gesellschaft Mit Beschränkter Haftung | Diagnosevorrichtung für einen Sanddosierer für ein Sandungssystem für ein Schienenfahrzeug und Verfahren zum Durchführen einer Diagnose für einen Sanddosierer für ein Sandungssystem für ein Schienenfahrzeug |
DE102022200419A1 (de) | 2022-01-14 | 2023-07-20 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Infrastruktur- und Topografie-abhängiger Einsatz von kraftschlussbeeinflussenden Maßnahmen oder Wirbelstrombremsen, beispielsweise Einrichtungen zur Ausgabe von adhäsionserhöhendem Mittel |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE483011C (de) * | 1927-11-09 | 1929-09-24 | Anon Soc | Sandstreuvorrichtung fuer Fahrzeuge |
DK1181179T3 (da) * | 1999-05-19 | 2006-04-10 | Aea Technology Plc | Forögelse af hjul/skinne-adhæsionen |
DE10047249A1 (de) * | 2000-09-23 | 2002-04-11 | Daimlerchrysler Rail Systems | Vorrichtung und Verfahren zur Traktionsregelung |
DE102004014360B4 (de) * | 2004-03-24 | 2010-05-20 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Sandungseinrichtung für Schienenfahrzeuge |
JP4763432B2 (ja) * | 2004-12-06 | 2011-08-31 | 住友金属工業株式会社 | 鉄道車両の摩擦制御装置 |
CN100434320C (zh) * | 2004-12-06 | 2008-11-19 | 住友金属工业株式会社 | 铁路车辆的摩擦控制装置 |
DE102005001404C5 (de) * | 2005-01-12 | 2016-06-09 | Kes Keschwari Electronic Systems Gmbh & Co. Kg | Verfahren und Einrichtung zum Aufbringen von Sand zwischen Rad und Schiene eines Schienenfahrzeugs |
DE102007060032A1 (de) * | 2007-12-13 | 2009-06-25 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Verfahren und Regeleinrichtung zur Antriebs- und Bremskraftkontrolle eines Fahrzeugs sowie ein Fahrzeug mit der Regeleinrichtung |
-
2011
- 2011-09-09 DE DE102011112969.7A patent/DE102011112969B4/de active Active
-
2012
- 2012-09-07 CN CN201280043970.9A patent/CN103796896B/zh active Active
- 2012-09-07 WO PCT/EP2012/067549 patent/WO2013034717A1/de unknown
- 2012-09-07 EP EP12756719.6A patent/EP2753524B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2013034717A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012002929A1 (de) | 2012-02-14 | 2013-08-14 | Jürgen Lewald | Minimalinvasives Verfahren für die Diagnose und die Therapieverlaufskontrolle der Endometriose |
Also Published As
Publication number | Publication date |
---|---|
WO2013034717A8 (de) | 2013-05-23 |
WO2013034717A1 (de) | 2013-03-14 |
DE102011112969A1 (de) | 2013-03-14 |
DE102011112969B4 (de) | 2022-12-29 |
EP2753524B1 (de) | 2019-06-19 |
CN103796896A (zh) | 2014-05-14 |
CN103796896B (zh) | 2016-09-07 |
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