CA2042378A1 - Freely programmable, regulated mechanical brake for rail-bound vehicles - Google Patents
Freely programmable, regulated mechanical brake for rail-bound vehiclesInfo
- Publication number
- CA2042378A1 CA2042378A1 CA 2042378 CA2042378A CA2042378A1 CA 2042378 A1 CA2042378 A1 CA 2042378A1 CA 2042378 CA2042378 CA 2042378 CA 2042378 A CA2042378 A CA 2042378A CA 2042378 A1 CA2042378 A1 CA 2042378A1
- Authority
- CA
- Canada
- Prior art keywords
- brake
- deceleration
- rail
- braking force
- determined
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/1701—Braking or traction control means specially adapted for particular types of vehicles
- B60T8/1705—Braking or traction control means specially adapted for particular types of vehicles for rail vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/665—Electrical control in fluid-pressure brake systems the systems being specially adapted for transferring two or more command signals, e.g. railway systems
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hydraulic Control Valves For Brake Systems (AREA)
- Braking Arrangements (AREA)
Abstract
Abstract In the controlled mechanical rail pinching brake, the prescribed braking deceleration is obtained in that an on-board computer compares the required braking deceleration with the actual braking deceleration and changes the brake pressure in such a way that the required braking deceleration is attained.
Description
2~42~78 P3931795.1 September 17, 1990 FREELY PROGRAMMABLE, R~GULATED MECHANICAL B~AKE
FOR RAIL-BOUND VEHICLES
Specification:
The invention relates to a track pinching brake as defined in the preamble of claim 1. For a known linear motor driven magnetic levitation train system including permanent magnets to support and drive vehicles, the vehicles are braked, primarily in connection with vehicles for passenger traffic, in addition to the linear motor by a mechanical track pinching brake as the emergency and parking brake.
The track pinching brake i6 composed of at least two or more brake pads which are pressed against one another onto the brake profile of the magnetic track disposed between them. For reasons of passenger safety, a maximum decelera-tion value must not be exceeded. A minimum deceleration must also be ensured in order to realize deceleration values as described by licensing authorities. Due to the system specific dissipation of the vehicle weight in a magnetic levitation train system, be the vehicle loaded or unloaded, by means o-f permanent magnets to 5% of the weight and thus the connected reduced friction of the spacer rollers moving on the track rail, an additional mechanical brake of high efficiency must be able in emergency situatin to reliably brake vehicles with a controlled deceleration until they come to a complete stop.
Known supplemental mechanical brakes are able to meet this requirement only insufficiently since, among others, the coefficient of friction of the brake pads on the brake profile of the magnetic levitation track are a function of the weather. For example, particularly if ice forms on the brake of the magnetic levitation train, conventional brake systems are unable to produce the required minimum decelera-tion if, under normal conditions, a maximum deceleration required for passenger safety is not to be exceeded.
It is therefore an object of the present invention to ensure, by means of a supplemental brake, a magnetic levita-tion train deceleration curve which is the same under all conditions, such as different weather conditions and/or loads. This is accomplished according to the invention by the characterizing features of claim 1. Advantageous features and/or modifications are defined in the dependent claims.
The invention will now be described in greater detail:
The required rated deceleration curve is programmed into an on-board computer. During the braking process, the actual deceleration can be determined, for example, by way of a change in the vehicle velocity. The velocity of the vehicle can be measured, for example, by means of radar, infrared, optical or electromagnetic sensors, pole counting in linear motors or by means of a tachometer wheel. In the on-board computer, the actual deceleration is compared with the desired deceleration and the braking force is determined that is required to attain the prescribed deceleration. This braking force is given as a control value to the braking force regulator which then imparts the required brake pressure to the rail pinching brake. In this way, a con-tinuous braking deceleration is realized independently of the respective load state of the vehicle. Good braking results are obtained even under the most varied conditions of the track (moisture, frost, etc.). In the same sense, the rail pinching brake can also be employed for cable car trains.
FOR RAIL-BOUND VEHICLES
Specification:
The invention relates to a track pinching brake as defined in the preamble of claim 1. For a known linear motor driven magnetic levitation train system including permanent magnets to support and drive vehicles, the vehicles are braked, primarily in connection with vehicles for passenger traffic, in addition to the linear motor by a mechanical track pinching brake as the emergency and parking brake.
The track pinching brake i6 composed of at least two or more brake pads which are pressed against one another onto the brake profile of the magnetic track disposed between them. For reasons of passenger safety, a maximum decelera-tion value must not be exceeded. A minimum deceleration must also be ensured in order to realize deceleration values as described by licensing authorities. Due to the system specific dissipation of the vehicle weight in a magnetic levitation train system, be the vehicle loaded or unloaded, by means o-f permanent magnets to 5% of the weight and thus the connected reduced friction of the spacer rollers moving on the track rail, an additional mechanical brake of high efficiency must be able in emergency situatin to reliably brake vehicles with a controlled deceleration until they come to a complete stop.
Known supplemental mechanical brakes are able to meet this requirement only insufficiently since, among others, the coefficient of friction of the brake pads on the brake profile of the magnetic levitation track are a function of the weather. For example, particularly if ice forms on the brake of the magnetic levitation train, conventional brake systems are unable to produce the required minimum decelera-tion if, under normal conditions, a maximum deceleration required for passenger safety is not to be exceeded.
It is therefore an object of the present invention to ensure, by means of a supplemental brake, a magnetic levita-tion train deceleration curve which is the same under all conditions, such as different weather conditions and/or loads. This is accomplished according to the invention by the characterizing features of claim 1. Advantageous features and/or modifications are defined in the dependent claims.
The invention will now be described in greater detail:
The required rated deceleration curve is programmed into an on-board computer. During the braking process, the actual deceleration can be determined, for example, by way of a change in the vehicle velocity. The velocity of the vehicle can be measured, for example, by means of radar, infrared, optical or electromagnetic sensors, pole counting in linear motors or by means of a tachometer wheel. In the on-board computer, the actual deceleration is compared with the desired deceleration and the braking force is determined that is required to attain the prescribed deceleration. This braking force is given as a control value to the braking force regulator which then imparts the required brake pressure to the rail pinching brake. In this way, a con-tinuous braking deceleration is realized independently of the respective load state of the vehicle. Good braking results are obtained even under the most varied conditions of the track (moisture, frost, etc.). In the same sense, the rail pinching brake can also be employed for cable car trains.
Claims (3)
1. A mechanical rail pinching brake for a predetermined deceleration that must be maintained under all conditions, characterized in that the predetermined required deceleration curve is programmed into an on-board computer;
the actual deceleration is determined during the braking process;
the predetermined deceleration [programmed*] in the on-board computer is compared with the actual deceleration and the required braking force is determined;
the determined required braking force is given as a control value to a braking force regulator; and this braking force regulator gives the correspond-ingly required brake pressure to the rail pinching brake.
*Translator's note: the word "programmed" is missing in the German text, but - judging from the grammatical structure of the sentence - is believed to have been intended here.
the actual deceleration is determined during the braking process;
the predetermined deceleration [programmed*] in the on-board computer is compared with the actual deceleration and the required braking force is determined;
the determined required braking force is given as a control value to a braking force regulator; and this braking force regulator gives the correspond-ingly required brake pressure to the rail pinching brake.
*Translator's note: the word "programmed" is missing in the German text, but - judging from the grammatical structure of the sentence - is believed to have been intended here.
2. A mechanical rail pinching brake according to claim 1, characterized in that the actual deceleration is deter-mined by way of a change in the vehicle velocity.
3. A mechanical rail pinching brake according to claim 2, characterized in that the velocity is determined either by way of radar, infrared, optical or electromagnetic sensors, by pole counting or by a tachometer wheel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3931795.1 | 1989-09-23 | ||
| DE19893931795 DE3931795A1 (en) | 1989-09-23 | 1989-09-23 | FREE PROGRAMMABLE, CONTROLLED MECHANICAL BRAKE FOR RAIL VEHICLES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2042378A1 true CA2042378A1 (en) | 1991-03-24 |
Family
ID=6390042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2042378 Abandoned CA2042378A1 (en) | 1989-09-23 | 1990-09-21 | Freely programmable, regulated mechanical brake for rail-bound vehicles |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0445261A1 (en) |
| JP (1) | JPH04501842A (en) |
| CA (1) | CA2042378A1 (en) |
| DE (1) | DE3931795A1 (en) |
| WO (1) | WO1991004178A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3038283A1 (en) * | 2015-07-03 | 2017-01-06 | Metrolab | RAILWAY VEHICLE WITH ADJUSTABLE COMPENSATION BRAKES, AND ASSOCIATED BRAKING METHOD |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4131169A1 (en) * | 1991-09-19 | 1993-03-25 | Wabco Westinghouse Fahrzeug | METHOD FOR BRAKING A VEHICLE |
| DE19510755C2 (en) * | 1995-03-24 | 1998-09-17 | Abb Patent Gmbh | Brake arrangement for a rail-bound locomotive with multiple braking systems |
| DE10052258C1 (en) * | 2000-10-21 | 2002-04-04 | Dbt Maschinenfabrik Scharf Gmb | Braking method, for suspended overhead transport train e.g. for underground mine, uses electronic control system for controlling hydraulically pressure for operation of brake plates |
| WO2002074602A1 (en) * | 2001-03-20 | 2002-09-26 | Brent Felix Jury | Braking apparatus and method |
| EP1522480B1 (en) * | 2003-10-09 | 2010-12-08 | Bombardier Transportation GmbH | Brake monitoring apparatus and method for railway vehicle |
| DE102013205698A1 (en) * | 2013-03-28 | 2014-10-02 | Siemens Aktiengesellschaft | Device for controlling a drive device in a rail vehicle |
| EP2949523B1 (en) * | 2014-05-27 | 2018-04-25 | Jörg Beutler | Weight-independent safety brake |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1560448A (en) * | 1968-01-15 | 1969-03-21 | ||
| DE2840262C3 (en) * | 1978-09-15 | 1995-04-20 | Knorr Bremse Ag | Device for controlling pneumatic or electro-pneumatic brakes on rail vehicles |
| AT372438B (en) * | 1981-06-11 | 1983-10-10 | Voest Alpine Ag | RAIL CLAMP |
| US4512615A (en) * | 1982-07-21 | 1985-04-23 | Sumitomo Electric Industries, Ltd. | Brake controller |
| JPH07107653B2 (en) * | 1983-09-21 | 1995-11-15 | 住友電気工業株式会社 | Deceleration control method |
-
1989
- 1989-09-23 DE DE19893931795 patent/DE3931795A1/en not_active Withdrawn
-
1990
- 1990-09-21 EP EP19900914175 patent/EP0445261A1/en not_active Withdrawn
- 1990-09-21 JP JP51326590A patent/JPH04501842A/en active Pending
- 1990-09-21 WO PCT/EP1990/001605 patent/WO1991004178A1/en not_active Application Discontinuation
- 1990-09-21 CA CA 2042378 patent/CA2042378A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3038283A1 (en) * | 2015-07-03 | 2017-01-06 | Metrolab | RAILWAY VEHICLE WITH ADJUSTABLE COMPENSATION BRAKES, AND ASSOCIATED BRAKING METHOD |
| WO2017005650A1 (en) * | 2015-07-03 | 2017-01-12 | Metrolab | Rail vehicle fitted with adjustable compensation brakes, and associated braking method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1991004178A1 (en) | 1991-04-04 |
| EP0445261A1 (en) | 1991-09-11 |
| JPH04501842A (en) | 1992-04-02 |
| DE3931795A1 (en) | 1991-04-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |