EP3049303A1 - Device and method for improving a coefficient of friction between a wheel and a rail for a rail vehicle - Google Patents
Device and method for improving a coefficient of friction between a wheel and a rail for a rail vehicleInfo
- Publication number
- EP3049303A1 EP3049303A1 EP14772356.3A EP14772356A EP3049303A1 EP 3049303 A1 EP3049303 A1 EP 3049303A1 EP 14772356 A EP14772356 A EP 14772356A EP 3049303 A1 EP3049303 A1 EP 3049303A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sanding
- parameter
- sand
- sanding parameter
- rail
- 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 35
- 239000004576 sand Substances 0.000 claims abstract description 112
- 230000006872 improvement Effects 0.000 claims abstract description 11
- 238000005457 optimization Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000008685 targeting Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 239000013598 vector Substances 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
-
- 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
- B61C15/102—Preventing wheel slippage by depositing sand or like friction increasing materials with sanding equipment of mechanical or fluid type, e.g. by means of steam
Definitions
- the present invention relates to a method and apparatus for improving a bond between a wheel and a rail for a railway vehicle.
- Sanding systems are used in rail vehicles to improve the bond between wheel and rail.
- a sand container is used to sprinkle sand onto the rail in front of the wheel via a pipe or rubber grommet. This increases the adhesion between rail and wheel.
- the outlet of the pipe or rubber grommet is located a few centimeters before the wheel-rail engagement. Air turbulence and airflows that run transversely to the vehicle can partially take away the sand and prevent the sand being discharged from landing on the rail. The sand is blown away sideways. The responsible air flows depend on the speed of the rail vehicle and, for example, the wind conditions.
- This object is achieved by a device for improving a adhesion value between a wheel and a rail for a rail vehicle and a method for improving a adhesion value between a wheel and a rail for a rail vehicle according to the independent claims.
- the outer boundary conditions can influence the air flow transversely to the direction of travel in the area of the bogies or wheels of a rail vehicle.
- a speed-based setpoint value for example by virtue of a sinusoidal oscillation around the setpoint, whereby the optimum adhesion value between rail and wheel is determined.
- the optimal adhesion value determined in this way can then be used as a new desired value and further optimized by this point.
- the control utilizes deviations from the setpoint to determine if changing the setpoint of a sanding parameter results in an improved adhesion value.
- a method for improving an adhesion value between a wheel and a rail for a rail vehicle comprises the following steps, wherein the rail vehicle has a skid protection device and a sanding device, wherein the skid protection device is designed to determine the adhesion value between the wheel and the rail. wherein at least one sanding parameter of the sanding device is adjustable, wherein sand can be carried out by the sanding device according to the sanding parameter:
- a rail vehicle may have a sanding system.
- Sanding systems can be used in rail vehicles to increase static friction between the wheel and the rail.
- a sanding device may be part of a sanding plant.
- the sanding device may include a dispensing tube that is configured to apply or expel sand in the direction of a gap between the wheel and the rail.
- at least one sanding parameter of the sanitation device can be controlled or regulated.
- the sanding parameter can influence the spreading of the sand.
- a rail vehicle may have a slide protection device.
- An anti-slip device can protect a wheel against jamming during a braking operation.
- a slide protection device can monitor adhesive conditions between wheel and rail and provide a corresponding control signal or sensor signal.
- the anti-slip device may comprise an anti-slip sensor.
- the anti-skid device can evaluate a rotational speed signal and detect or regulate a slip of the wheel. From the slip, the anti-skid device may determine a value representing the adhesion value between wheel and rail or provide a signal representing the adhesion value.
- the setpoint of the sanding parameter can correspond to a speed-based setpoint for the sanding parameter in a first use or execution of the method.
- the optimization range around the setpoint may depend on the type of sanding parameter.
- the optimization range may include the setpoint.
- the optimization range may include a range greater than and less than 10 percent of the setpoint (that is, a tolerance range of 10 percent about the setpoint).
- the method may be performed iteratively to improve a bond between a wheel and a rail for a rail vehicle.
- any or a speed-based setpoint for the sanding parameter can be selected.
- a new setpoint value can then be set, which is obtained when the steps of the method are repeated. is used.
- the setpoint of the sanding parameter can be adjusted and / or optimized with each run of the steps of the method.
- an optimal value for the sanding parameter can thus be set even with changing external influences.
- a discharge angle of the sand with respect to the rail can be used.
- a sand quantity can be changed as a sanding parameter. It is also favorable if a discharge rate of the sand is used as the sanding parameter in the step of changing.
- Step of changing an air quantity can be used as a sanding parameter.
- the amount of air can control the discharge rate and at the same time or alternatively the application rate of the sand.
- Sand can be discharged from the sander in one direction.
- the direction in which the sand is discharged or blown out may be characterized by a discharge angle or discharge angle.
- the discharge angle can be understood as an angle between the rail and the direction in which the sand is discharged or blown out.
- the deployment angle may be movably adjustable in a plane perpendicular to the plane defined by the wheel and rail.
- the deployment angle can be adjustable in the direction of the vehicle center of the rail vehicle, that is to say in the direction of a track center.
- At least one first sanding parameter representing a first physical size and a second sanding parameter representing a second physical size may be changed, and in the step of determining at least one first optimal sanding parameter and one second optimum sanding parameter are determined to set the first sanding parameter setpoint to the first optimum sanding parameter and the second sanding parameter setpoint to the second optimum sanding parameter in the setting step.
- the first sanding parameter and the second sanding parameter can represent two different physical quantities.
- a discharge angle of the sand can be used as the first sanding parameter
- a discharge speed can be used as the second sanding parameter.
- the steps of the method are carried out in succession for at least one first sanding parameter and one second sanding parameter different therefrom.
- the first sanding parameter and the second sanding parameter can represent two different physical quantities. In terms of regulation, it may be simpler to regulate or optimize a sanding parameter at one time, that is, a variable size. By optimizing two different physical quantities as sanding parameters successively, alternately with the steps of changing, determining, determining and adjusting, one can combine the advantages of two different physical quantities as sanding parameters and a simpler control than with two variable sizes at the same time ,
- the method of improving a bond between a wheel and a rail for a railway vehicle is characterized by a step of discharging sand according to the target value.
- sand can generally be understood as meaning a stiction-increasing agent or an agent which is suitable for increasing the static friction between wheel and rail.
- the rail vehicle may have a Gleitschutz worn and a sanding device.
- the anti-slip device can be designed to determine a coefficient of adhesion between the wheel and the rail and to provide a signal representing the adhesion value.
- the sanding device can be designed for discharging sand into a gap between the rail and the wheel of the rail vehicle, with at least one sanding parameter of the sanding device being adjustable. In this case, sand can be carried out by the sanding device in accordance with the sanding parameter.
- the apparatus has the following features: means for varying the sanding parameter to deploy sand in accordance with the sanding parameter, wherein the altering occurs within a predefined optimization range about a setpoint of the sanding parameter; means for determining at least two adhesion values during the sanding parameter altered in the step of altering to determine a adhesion value for each one of at least two different values of the sanding parameter; means for determining an optimum adhesion value from the at least two adhesion values to determine an optimal sanding parameter; and means for setting the sanding parameter set point to the optimum sanding parameter to achieve an adhesion value improvement.
- the discharge angle between a discharge direction of the sand and the rail can be formed.
- the means for varying may be configured to movably adjust the deployment angle out of a plane of the wheel and rail to inject sand into the gap between the rail and the wheel.
- an introduction can also be understood as a dispensing.
- a quantity of sand can be understood in the device for changing.
- a discharge rate of the sand can be set as a sanding parameter.
- a quantity of sand can represent a quantity of sand to be delivered out of the sanding device.
- the means for determining may be designed to determine the optimum adhesion value of the at least two adhesion values such that the adhesion value of the at least two adhesion values representing the better adhesion value is determined as the optimal adhesion value.
- the optimum adhesion value can be used to determine a bonding value which represents the best adhesion value of the multiplicity of adhesion values.
- the setpoint of the sanding parameter can be set to the value of the sanding parameter assigned to the optimum adhesion value.
- the device for improving a bond between a wheel and a rail for a rail vehicle which may also be referred to as electronic control, may be integrated into brake control electronics.
- the signals already present in the brake control electronics can be directly read in, such as speed or emergency brake.
- signals already existing in the device do not need to be detected or transmitted separately.
- sanding could then be automatically started when there is too much slippage by the anti-skid electronics, and if there is no slippage, the sanding could be shut off automatically to save sand.
- the means for changing may increase and decrease the spreading angle of the sanding plant as a sanding parameter in a range and thereby increase the amount of sand as a sanding parameter if the adhesion value determined in the device for determining falls below a predefined threshold.
- the sand pipe can be quickly swiveled back and forth about the controlled target angle in order to increase the chance of hitting the rail.
- the amount of sand can be greatly increased in order to compensate for the sand loss by not direct targeting, because a broad area is scattered. This can for example be advantageous as a last resort in emergency braking, for example, when the adhesion value reaches an extremely low value. It is advantageous if such an embodiment can be controlled as an emergency measure.
- FIG. 1 is a schematic representation of a rail vehicle with a sanding device in a side view according to an embodiment of the present invention
- FIG. 2 shows a schematic representation of a rail vehicle with a sanding device in a plan view according to an exemplary embodiment of the present invention
- FIG. 3 is a block diagram of a device for improving an adhesion value between a wheel and a rail for a rail vehicle according to an embodiment of the present invention
- FIG. 4 and 5 each show a schematic representation of the discharge rate of a sanding apparatus according to an embodiment of the present invention.
- FIG. 6 shows a representation of the relationship of a sanding parameter to a adhesion value in a diagram according to an exemplary embodiment of the present invention.
- FIG. 7 is a flowchart of a method for improving a bond between a wheel and a rail for a rail vehicle according to an embodiment of the present invention.
- FIG. 1 shows a schematic illustration of a rail vehicle 100 with a sanding device 102 in a side view according to an embodiment of the present invention.
- the sanding device 102 is arranged in front of a wheel 104 of the rail vehicle 100 in the direction of travel.
- the at least one wheel 104 of the rail vehicle 100 is arranged to form a rail 106 such that the rail vehicle 100 travels on the rail 106.
- the sanding device has a discharge means 108 for discharging sand 10.
- the discharge means 108 is connected to a device 12 for adjusting at least one sanding parameter.
- the wheel 104 is connected to a slide protection device 1 14.
- the anti-slip device 1 14 has a Gleitschutzsensor 1 16.
- the means for adjusting 1 12 at least one sanding parameter is connected to a means for changing 1 18.
- the means for changing 1 18 is adapted to output a signal representing the at least one sanding parameter to be set.
- the anti-skid sensor 16 is connected to a device 120 for determining.
- the device for determining men 120 is configured to determine a adhesion value, or to determine a plurality of adhesion values.
- the means for determining 120 is further connected to the means for changing 1-18 so that a sticking value can be assigned for a sanding parameter.
- the device 120 for determination 120 is provided with a device for determining 122 an optimal adhesion value from the at least two adhesion values determined in the device for determining 120.
- an optimum adhesion value can be determined determined in the means 122 for determining 122 in order to determine an optimal sanding parameter.
- a set value setting means 124 is connected to the means 122 for determining.
- the means for altering 18 is connected to the means 124 for adjusting sanding parameters to a value in an optimization range around the target value.
- the means 1 18 for determining, the means for determining 122 and the means for setting the desired value 124 together form a device 126 for improving an adhesion value between a wheel 104 and a rail 106 for a rail vehicle 100.
- the anti-skid device 14 includes the anti-skid sensor 16 and the means for determining 120.
- the anti-skid sensor 16 can detect a rotational speed and provide a rotational speed signal.
- the means for determining 120 may be configured in one embodiment to evaluate the rotational speed signal and detect a slip of the wheel 104. From the slip, the anti-skid device 14 can determine a value representing the adhesion value between wheel and rail or provide a signal representing the adhesion value.
- the angle of attack of the sanding device 102 referred to as sanding system 102, is continuously adjusted during braking.
- the optimum angle can be determined as the maximum point and then adjusted.
- this optimum angle can then be readjusted again and again.
- the swinging back and forth can for example take place at an angle of ⁇ 5 degrees, or alternatively at an angle of ⁇ 10 degrees, or alternatively at an angle of ⁇ 15 degrees.
- the readjustment is also necessary because the vehicle speed decreases during braking and therefore change the outer boundary conditions.
- the application rate of the sand 1 10 is controlled by the sander 102 as a sanding parameter. Also, by such an embodiment, an improvement of sandungs employmenten adhesion improvement can be achieved. Parallel, successively or individually to determine the ideal Ausbringwinkels on the adjustment of the discharge direction, the application rate of the sand 1 10 can be adjusted. If no sand 1 10 scattered, no improvement in the adhesion value is achieved. By increasing the amount of sand initially improves the adhesion value until a higher amount brings no improvement with it. This amount of sand in turn depends on the weather conditions (for example, wet, dry, icy, dirty rail). The determination of the ideal amount is made by the recognition of a changing frictional connection by the anti-skid system 102.
- the amount of air and at the same time or alternatively the air speed or blow-out speed of the sand 110 are regulated as sanding parameters.
- Parallel, successively or individually to determine the ideal Ausbringwinkels on the adjustment of the discharge direction, and at the same time or alternatively, the determination of the application rate of the sand 1 10, the determination of the ideal application rate can be carried out.
- the determination of the ideal air quantity is carried out by the recognition of a changing frictional connection by the anti-skid system 102 at the same time as the application speeds changed by the control, which, for example, can be achieved by blowing additional air into the sand pipe of the sanding plant 102.
- FIG. 2 shows a schematic representation of a part of a rail vehicle with a sanding device 102 in a plan view according to an exemplary embodiment of the present invention.
- a wheel 104 is disposed on a rail 106. From the wheel 104 and the rail 106, a plane is clamped. In the direction of travel in front of the wheel 104, a discharge means 108 of a sanding device 102 is arranged.
- the dispensing means 108 may be a dispensing tube, a blowout tube, or a nozzle.
- the sanding apparatus 102 and the wheel 104 may be elements of a railroad vehicle 100 shown in FIG. 1.
- the wheel 104 has a flange 228, which is arranged in the direction of a vehicle center of the rail vehicle relative to the rail 106.
- the discharge means 108 is adapted to spend or blow out sand 1 10 at a discharge angle ⁇ .
- the discharge means 108 is connected to a device 1212 for setting a sanding parameter, for example for adjusting the discharge angle ⁇ of the discharge means 108.
- An application angle ⁇ designates an angle between the discharge means 108 or the discharge direction 230 of the sand 110 from the discharge means 108 and a plane spanned by the wheel 104 and the rail 106. In the embodiment shown in FIG. 2, the deployment angle ⁇ is directed in the direction of the plane in the direction of the vehicle center of the rail vehicle.
- the adjusting device 12 is configured to adjust the amount of sand.
- the means for adjusting 1 12 is adapted to adjust the discharge rate.
- the discharge means 108 may comprise a monitoring device 232, which is designed to detect a sanding parameter 234 and to provide the actual value of the sanding parameter 234.
- the device 126 is configured to provide a sanding parameter 234.
- the means for changing 1 18 is adapted to set a discharge angle ⁇ of the sanding plant 102 as a sanding parameter.
- the discharge angle ⁇ between an application direction 230 of the sand 1 10 and the rail 106 may be formed.
- the deployment angle movably adjustable from a plane of wheel and rail to inject sand 1 10 into the gap between rail 106 and wheel 104.
- a sand quantity and simultaneously or alternatively a discharge rate of the sand as sanding parameters can be set in the device for changing.
- the means for determining is designed to determine the optimum adhesion value of the at least two adhesion values such that the adhesion value of the at least two adhesion values representing the better adhesion value is determined as the optimal adhesion value.
- FIG. 3 shows a block diagram of a device 126 for improving a bonding value between a wheel and a rail for a rail vehicle, using a method for speed-dependent targeting in sanding systems and simultaneously or alternatively a method for optimized sand application amount as a function of the relative adhesion value improvement wheel-rail ,
- a method for adhesion value-dependent control of a sanding plant is used.
- the outlet opening is rotated in the direction of the vehicle center, so that the sand 1 10 falls in front of the wheel 104 only in combination with the deflection by the transverse air.
- the sand 1 10 is steered too far to the center of the vehicle, in the right position at medium speed and too far out at high speed. Due to the described change in the application angle a, the sand 110 is optimally deployed in all speed ranges. It is also possible to take account of overlays due to, for example, different wind conditions. For example, if there is a strong wind, the wind changes
- the device 126 or the process running thereon adapts to the different requirements and, in one exemplary embodiment, can adapt the amount of sand as a function of the rail condition.
- FIG. 3 is a block diagram of a device 126 for improving a bond between a wheel and rail for a rail vehicle according to an embodiment of the present invention.
- the device 126 may be in a rail vehicle as shown in Fig. 1 are used.
- the device 126 comprises a device for changing 1 18, a device for determining 120, a device for determining 122 and a device for setting the desired value 124.
- the device 126 has an interface 336.
- the device 126 is designed to provide a sanding parameter 234 via the interface 336 and to read in a bonding value 340.
- the means for altering 18 is configured to provide the sanding parameter 228 at the interface 336.
- a speed-based setpoint can be used, by which the sanding parameter 234 is changed in a predefined optimization range.
- the determining device 120 is configured to determine an associated adhesion value 342 for a sanding parameter 234.
- the means 122 for determining is designed to determine an optimum adhesion value in order to provide an optimal sanding parameter 344.
- the set point setting means 346 is configured to set the set point 346 to the optimum sanding parameter 228 and to provide the means for changing 1-18.
- the sand is "shot" in front of the wheel via a large airflow and relatively small dispensing nozzle at the highest possible speed.
- the higher discharge speed reduces the lateral deflection.
- the resulting speed is composed of output speed and deflection speed.
- the proportion of distraction is less affected by the higher rate of application.
- the sand lands in large quantities on the rail. The relationship between the discharge speed and the deflection speed and the resulting speed is explained in more detail in the following two figures Fig. 4 and Fig. 5. 4 shows a schematic illustration of the discharge rate of a sanding device according to an exemplary embodiment of the present invention.
- sand is blown out in the direction of a wheel 104, wherein an air flow from the side is assumed.
- Three velocity vectors 448, 450, 452 represent a discharge rate 448 of the sand, a sweep rate 450, and a resultant velocity 452 of the sand.
- the blown out Sand is deflected by the angle ⁇ from the direction in which the sand is blown out.
- the direction in which the sand is blown out should be corrected by the blow-off angle ⁇ against the direction of the air flow.
- the embodiment in FIG. 4 shows the resulting velocity 452 for a low dispensing rate 448 as compared to the embodiment of FIG. 5, which presents the same issue at a relatively high dispensing rate 448 for this purpose.
- FIG. 5 shows a schematic representation of the discharge rate of a sanitation device according to an embodiment of the present invention.
- the representation in FIG. 5 corresponds to the illustration in FIG. 4, with the difference that the dispensing speed 448 has been increased, for example doubled.
- constant deflection speed 450 results in an increased resulting speed 452 and a small angle a.
- Figures 4 and 5 show graphs from which it can be seen that blowing the sand towards the center of the vehicle through the combination of the discharge velocity 448 with the air flow due to back pressure resulting in a sweeping speed 450 of the sand improves the sand under certain conditions into the gap between see the rail and the wheel can blow.
- the discharge velocity 448 with the air flow due to back pressure resulting in a sweeping speed 450 of the sand improves the sand under certain conditions into the gap between see the rail and the wheel can blow.
- FIG. 6 shows a representation of the relationship of a sanding parameter to a adhesion value in a diagram according to an embodiment of the present invention.
- a sanding parameter is plotted on the abscissa and a bond value is plotted on the ordinate.
- a curve 656 of the adhesion value is recorded via the sanding parameter, wherein the curve 656 has the form of a Gaussian curve or a normal distribution in each case.
- an optimal sanding parameter 344 may be determined, plotted as a straight line to the abscissa, parallel to the ordinate.
- the sanding parameter chosen is a discharge angle ⁇ of the sand.
- the discharge angle ⁇ describes an angle between an application direction of the sand with respect to the rail. Since in the bogie of a rail vehicle, an air flow from the vehicle center in the direction of the wheels 104 can flow, the sand can be blown to the side. In order to compensate for this effect, the sand is discharged below the discharge angle ⁇ in dependence on the strength of the air flow and / or the vehicle speed in order to be introduced into a gap between the rail and the wheel 104.
- a set point 346 is defined by an optimization range 654 in which the sanding parameter is changed.
- the adhesion value or a value representing the adhesion value is determined. From the resulting curve 656, an optimum adhesion value and thus an optimal sanding parameter or, in this embodiment, deployment angle ⁇ can be determined.
- the amount of sand can be varied as a sanding parameter. Depending on the speed of travel and the condition of the rails, different amounts of sand must be removed from the sanding plant in order to achieve the necessary adhesion value between wheel and rail for braking. To save sand, not unnecessarily much sand should be scattered. By the relationship between the adhesion value and the sanding parameter shown in the diagram, an optimal amount of sand can be determined.
- the parameters of the sanding installation such as, for example, the amount of sand, the rate of air blowout or the target direction of the discharge nozzle or target direction of the discharge pipe of the sanding device, are optimally regulated in such a way that the adhesion value necessary for the braking is achieved.
- the amount of sand between the wheel and rail is increased by accurate “goals”. Due to different track conditions and different braking requirements different amounts of sand can be applied to achieve the required adhesion value.
- the angle can not be set via a speed-dependent map, but always readjusted.
- an alternative sanding parameter can be used as a control parameter.
- the adhesion-improving effect of the sanding is used directly as a control parameter. Enough braking of the adhesion value between wheel and rail is not sufficient, the slip between wheel and rail increases. This is detected by the existing anti-slip system and it must be sent to increase the adhesion value.
- FIG. 7 shows a flowchart of a method for improving a bond between a wheel and a rail for a rail vehicle according to an embodiment of the present invention. The method 700 may be performed on a device 126 as described in FIGS. 1 to 3.
- the method 700 includes a step of changing 710, a step of determining 720, a step of determining 730, and a step of adjusting 740.
- a sanding parameter is altered to deploy sand in accordance with the sanding parameter, wherein the altering occurs within a predefined optimization range around a setpoint of the sanding parameter.
- the setpoint may be selected as a function of the speed.
- the setpoint may be a predefined value if the steps of the method are initially completed.
- the sanding parameter is varied or changed in response to the setpoint.
- the amount of the sanding parameter can be sequentially increased and decreased.
- three different sanding parameters are set, in another embodiment, a plurality of different values, smaller and larger than the target value.
- step of determining 720 at least two adhesion values of adhesion values are determined during the sanding parameter modified in the step of changing 710. In this case, for each sanding parameter, a bonding value or a value representing the adhesion value can be determined.
- step of determining 720 an adhesion value is determined for each one of at least two different values of the sanding parameter. From the at least two adhesion values determined in the step of determining 720, an optimum adhesion value is determined in the step of the determination 730 in order to determine an optimal sanding parameter.
- the sanding setpoint is set to the optimum sanding parameter to achieve an adhesion value improvement.
- a sanding parameter of the sand relative to the rail may be changed as the sanding parameter.
- an amount of sand in the step of changing 710 may be changed as a sanding parameter.
- an amount of air or a discharge rate of the sand may be used.
- the different variants or embodiments of the sanding parameter can be combined with each other in one embodiment.
- At least one first sanding parameter representing a first physical size and a second sanding parameter representing a second physical size may be changed, and in the step of determining 720, at least a first optimal sanding parameter and a second optimum sanding parameter are determined to set the first sanding parameter setpoint to the first optimal sanding parameter and the second sanding parameter setpoint to the second optimal sanding parameter, wherein the first sanding parameter and the second sanding parameter represent two different physical sizes.
- the steps of method 700 may be performed sequentially for at least one first sanding parameter and a second sanding parameter different therefrom, wherein the first sanding parameter and the second sanding parameter represent two different physical sizes.
- the steps of method 700 may always be performed alternately for the two different sanding parameters.
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- Engineering & Computer Science (AREA)
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Abstract
Description
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013016135.5A DE102013016135B4 (en) | 2013-09-27 | 2013-09-27 | Apparatus and method for improving a bond between a wheel and a rail for a railway vehicle |
PCT/EP2014/070442 WO2015044246A1 (en) | 2013-09-27 | 2014-09-25 | Device and method for improving a coefficient of friction between a wheel and a rail for a rail vehicle |
Publications (2)
Publication Number | Publication Date |
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EP3049303A1 true EP3049303A1 (en) | 2016-08-03 |
EP3049303B1 EP3049303B1 (en) | 2017-11-15 |
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Application Number | Title | Priority Date | Filing Date |
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EP14772356.3A Active EP3049303B1 (en) | 2013-09-27 | 2014-09-25 | Device and method for improving a coefficient of friction between a wheel and a rail for a rail vehicle |
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EP (1) | EP3049303B1 (en) |
DE (1) | DE102013016135B4 (en) |
WO (1) | WO2015044246A1 (en) |
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DE102015007852B4 (en) * | 2015-06-18 | 2019-06-06 | Karl Brotzmann Consulting Gmbh | Method for effectively braking on slippery roads |
US10905496B2 (en) | 2015-11-16 | 2021-02-02 | Think Surgical, Inc. | Method for confirming registration of tracked bones |
DE102016100291B3 (en) * | 2016-01-11 | 2017-03-16 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Dispensing device and method for dispensing friction coefficient modifiers for a rail vehicle |
ES2906456T3 (en) * | 2018-05-17 | 2022-04-18 | Siemens Mobility GmbH | Controllable track conditioning unit |
DE102018209920B3 (en) * | 2018-06-19 | 2019-07-11 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | A method of predicting an adhesion value in a contact point between a wheel of a rail vehicle and the rail, a method of improving the adhesion value in a contact point between a wheel of a rail vehicle and the rail and apparatus for performing the method |
DE102018215231A1 (en) * | 2018-09-07 | 2020-03-12 | Bayerische Motoren Werke Aktiengesellschaft | Method, device, computer program and computer program product for determining a quality characteristic, a vehicle-specific coefficient of friction and a coefficient of friction map |
DE102019123233B3 (en) * | 2019-08-29 | 2021-02-25 | Knorr-Bremse Gesellschaft Mit Beschränkter Haftung | Device and method for monitoring a sanding process for a sanding system for a rail vehicle, sanding device, rail vehicle and track device |
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WO2000071399A1 (en) | 1999-05-19 | 2000-11-30 | Aea Technology Plc | Wheel/rail adhesion enhancement |
DE102005001404C5 (en) | 2005-01-12 | 2016-06-09 | Kes Keschwari Electronic Systems Gmbh & Co. Kg | Method and device for applying sand between wheel and rail of a rail vehicle |
US20120061367A1 (en) * | 2010-08-09 | 2012-03-15 | Jeffrey Wolff | System and method for improving adhesion |
DE102011113085B4 (en) * | 2011-09-09 | 2014-12-24 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Particle spreading system for a rail vehicle |
DE102011112969B4 (en) * | 2011-09-09 | 2022-12-29 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Particle scattering system for a rail vehicle |
DE102011113070B4 (en) * | 2011-09-09 | 2020-07-23 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Method for operating a particle scattering system |
-
2013
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2014
- 2014-09-25 EP EP14772356.3A patent/EP3049303B1/en active Active
- 2014-09-25 WO PCT/EP2014/070442 patent/WO2015044246A1/en active Application Filing
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11970191B2 (en) | 2018-05-17 | 2024-04-30 | Siemens Mobility GmbH | Track-conditioning unit with device for rail drying |
Also Published As
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DE102013016135A1 (en) | 2015-04-02 |
WO2015044246A1 (en) | 2015-04-02 |
EP3049303B1 (en) | 2017-11-15 |
DE102013016135B4 (en) | 2019-07-18 |
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