EP3472018B1 - Rail vehicle and method for operating a rail vehicle - Google Patents

Rail vehicle and method for operating a rail vehicle Download PDF

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Publication number
EP3472018B1
EP3472018B1 EP17726541.0A EP17726541A EP3472018B1 EP 3472018 B1 EP3472018 B1 EP 3472018B1 EP 17726541 A EP17726541 A EP 17726541A EP 3472018 B1 EP3472018 B1 EP 3472018B1
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EP
European Patent Office
Prior art keywords
drive
motor
rail vehicle
hydrodynamic
pump
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EP17726541.0A
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German (de)
French (fr)
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EP3472018A1 (en
Inventor
Christian WEITERSBERGER
Christoph Kaiser
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Plasser und Theurer Export Von Bahnbaumaschinen GmbH
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Plasser und Theurer Export Von Bahnbaumaschinen GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C9/00—Locomotives or motor railcars characterised by the type of transmission system used; Transmission systems specially adapted for locomotives or motor railcars
    • B61C9/08—Transmission systems in or for locomotives or motor railcars with IC reciprocating piston engines
    • B61C9/14—Transmission systems in or for locomotives or motor railcars with IC reciprocating piston engines hydraulic, including combinations with mechanical gearing
    • 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
    • B61C15/14—Maintaining or augmenting the starting or braking power by auxiliary devices and measures; Preventing wheel slippage; Controlling distribution of tractive effort between driving wheels controlling distribution of tractive effort between driving wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C9/00—Locomotives or motor railcars characterised by the type of transmission system used; Transmission systems specially adapted for locomotives or motor railcars
    • B61C9/08—Transmission systems in or for locomotives or motor railcars with IC reciprocating piston engines
    • B61C9/14—Transmission systems in or for locomotives or motor railcars with IC reciprocating piston engines hydraulic, including combinations with mechanical gearing
    • B61C9/16—Transmission systems in or for locomotives or motor railcars with IC reciprocating piston engines hydraulic, including combinations with mechanical gearing using gearing of the hydrostatic type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C9/00—Locomotives or motor railcars characterised by the type of transmission system used; Transmission systems specially adapted for locomotives or motor railcars
    • B61C9/08—Transmission systems in or for locomotives or motor railcars with IC reciprocating piston engines
    • B61C9/14—Transmission systems in or for locomotives or motor railcars with IC reciprocating piston engines hydraulic, including combinations with mechanical gearing
    • B61C9/18—Transmission systems in or for locomotives or motor railcars with IC reciprocating piston engines hydraulic, including combinations with mechanical gearing using gearing of the hydrokinetic type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C9/00—Locomotives or motor railcars characterised by the type of transmission system used; Transmission systems specially adapted for locomotives or motor railcars
    • B61C9/38—Transmission systems in or for locomotives or motor railcars with electric motor propulsion
    • B61C9/42—Transmission systems in or for locomotives or motor railcars with electric motor propulsion hydraulic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D15/00—Other railway vehicles, e.g. scaffold cars; Adaptations of vehicles for use on railways

Definitions

  • the invention relates to a rail vehicle with a vehicle frame supported on rail bogies and a hydraulic drive system driven by a motor, which comprises a hydrodynamic drive assigned to a first rail bogie and a hydrostatic drive assigned to a second rail bogie, to which a traction pump connected to a drive motor is assigned .
  • the invention also relates to a method for operating this rail vehicle.
  • Rail vehicles and track construction machines with hydrodynamic and / or hydrostatic drive are already well known.
  • the power required to operate such vehicles is the product of traction and speed.
  • the tractive force depends on the mass of the rail vehicle, the number of axles (total or driven) and the coefficient of friction between the rail and the wheel.
  • the invention has for its object to provide a rail vehicle and a method for its operation, with which an optimal power distribution of the drives can be achieved with changing coefficients of friction between wheel / rail.
  • this object is achieved in that the motor is designed for a higher power output than is required for the operation of the hydrodynamic drive, and in that a pump distribution gear is interposed between the motor and the hydrodynamic drive, via which the drive pump of the hydrostatic drive can be activated .
  • This training ensures a very good transmission of the drive power to the rail.
  • a constant power transmission is achieved especially under often changing external, weather and season-dependent conditions and the resulting changes in the coefficient of friction.
  • Rain, snow and ice, but also dirt from mud or autumn leaves change the coefficient of friction extremely unfavorably.
  • At least one further hydraulic pump for operating at least one further hydraulic drive for a working unit is assigned to the pump distribution gear.
  • various work units such as a crane, lifting platform, plow or even a snow blower
  • a hydraulic drive that is optimally designed for operation for the respective unit.
  • the drive consisting of pump and motor can be dimensioned according to the special requirements, so that an economical and performance-adjusted operation is guaranteed.
  • the object of the invention is also achieved by the use of a method in a rail vehicle according to the invention, in that Dependency of a friction value ⁇ between rail and wheel - the hydrostatic drive is switched on or off.
  • a particularly advantageous embodiment of the method is achieved by the following steps: a) determining a decreasing coefficient of friction ⁇ when operating with a hydrodynamic drive, b) switching on the hydrostatic drive by engaging the drive pump and the second drive motor, c) increasing the power of the motor, d) Operation of the rail vehicle with hydrodynamic and hydrostatic drive, e) reduction of engine power when a critical speed is exceeded, f) switching off the hydrostatic drive by disengaging the drive pump and the drive motor and g) operation of the rail vehicle with hydrodynamic drive.
  • Such method steps enable reliable and safe operation of the rail vehicle, which can be carried out almost independently of the difficult conditions already mentioned. Simultaneously increasing the engine power and dividing this power between the hydrodynamic and hydrostatic drive enables the rail vehicle to be operated largely unaffected by the unfavorable coefficient of friction, while the required adhesion between the rail and the wheel is always maintained. In the higher speed range, an increased engine power or a drive on several axles is no longer necessary, which is why the rail vehicle can be driven again by the hydrodynamic drive to save energy.
  • FIG. 1 A rail vehicle 1 designed as a track construction machine is shown. This essentially consists of a vehicle frame 4 supported on a first and a second rail undercarriage 2, 3.
  • the rail vehicle 1 has a hydraulic drive system 6 which is driven by a motor 5 which is preferably designed as an internal combustion engine.
  • This comprises a hydrodynamic drive 7 assigned to the first rail running gear 2 and a hydrostatic drive 8 assigned to the second rail running gear 3.
  • the latter is - as in FIG Fig. 2 can be seen - assigned a drive pump 10 connected to a drive motor 9.
  • the motor 5 is designed for a higher power output than is required for the operation of the hydrodynamic drive 7.
  • a pump distribution gear 11 is interposed between the motor 5 and the hydrodynamic drive 7.
  • the drive pump 10 of the hydrostatic drive 8 can be activated via this.
  • At least one further hydraulic pump 12 for operating at least one further hydraulic drive 13 for a working unit 14 is assigned to the pump distribution gear 11.
  • work units 14 would be crane 15, lifting platform 16 or snow blower 17.
  • the number of further hydraulic pumps 12 can vary in that either each work unit 14 is assigned its own hydraulic pump 12, or that a hydraulic pump 12 alternately drives one of the work units 14 .
  • the operation of the rail vehicle 1 is briefly described below. The operation takes place as a function of a coefficient of friction ⁇ between a rail 18 and a wheel 19, the hydrostatic drive 8 being switched on or off.
  • the rail vehicle 1 is mainly moved with the hydrodynamic drive 7.
  • the falling coefficient of friction ⁇ is determined with the aid of a measuring device 20.
  • the hydrostatic drive 8 is then switched on manually or automatically by engaging the drive pump 10 and the drive motor 9 Power of the motor 5, the rail vehicle 1 is now operated with hydrodynamic and hydrostatic drive 7, 8. If a critical speed v K is exceeded, the power of the motor 5 is reduced again and the hydrostatic drive 8 is switched off. This is done by disengaging the drive pump 10 and the drive motor 9.
  • the rail vehicle 1 is then driven again only by the hydrodynamic drive 7.

Description

Gebiet der TechnikTechnical field

Die Erfindung betrifft ein Schienenfahrzeug mit einem auf Schienenfahrwerken abgestützten Fahrzeugrahmen und einem von einem Motor angetriebenen, hydraulischen Antriebssystem, das einen einem ersten Schienenfahrwerk zugeordneten hydrodynamischen Antrieb, sowie einen einem zweiten Schienenfahrwerk zugeordneten hydrostatischen Antrieb, dem eine mit einem Fahrmotor verbundene Fahrpumpe zugeordnet ist, umfasst. Die Erfindung betrifft auch ein Verfahren zum Betrieb dieses Schienenfahrzeuges.The invention relates to a rail vehicle with a vehicle frame supported on rail bogies and a hydraulic drive system driven by a motor, which comprises a hydrodynamic drive assigned to a first rail bogie and a hydrostatic drive assigned to a second rail bogie, to which a traction pump connected to a drive motor is assigned . The invention also relates to a method for operating this rail vehicle.

Stand der TechnikState of the art

Schienenfahrzeuge und Gleisbaumaschinen mit hydrodynamischem und / oder hydrostatischem Antrieb sind bereits hinlänglich bekannt. Die zum Betrieb derartiger Fahrzeuge notwendige Leistung ist das Produkt aus Zugkraft und Geschwindigkeit. Die Zugkraft ist wiederum von der Masse des Schienenfahrzeuges, der Anzahl der Achsen (gesamt bzw. angetrieben) sowie vom Reibwert zwischen Schiene und Rad abhängig.Rail vehicles and track construction machines with hydrodynamic and / or hydrostatic drive are already well known. The power required to operate such vehicles is the product of traction and speed. The tractive force depends on the mass of the rail vehicle, the number of axles (total or driven) and the coefficient of friction between the rail and the wheel.

So beschreibt WO 2015/128770 A1 ein Verfahren zum Betrieb eines Schienenfahrzeuges und ein Schienenfahrzeug bei denen - wahlweise oder gemeinsam - sowohl ein hydrodynamisches als auch ein hydrostatisches, vom selben Motor angetriebenes Getriebe zum Einsatz kommen. Die Anwendung der Getriebe erfolgt in Abhängigkeit von der Fahrgeschwindigkeit und der Reibung Schiene / Rad.So describes WO 2015/128770 A1 a method for operating a rail vehicle and a rail vehicle in which - either optionally or together - both a hydrodynamic and a hydrostatic transmission driven by the same motor are used. The gearbox is used depending on the driving speed and the rail / wheel friction.

Aus DE 24 09 333 A1 ist eine Rangierlokomotive bekannt, die wahlweise über ein hydrodynamisches oder ein hydrostatisches Getriebe betrieben werden kann.Out DE 24 09 333 A1 a shunting locomotive is known which can be operated either via a hydrodynamic or a hydrostatic transmission.

Zusammenfassung der ErfindungSummary of the invention

Der Erfindung liegt die Aufgabe zugrunde, ein Schienenfahrzeug und ein Verfahren zu dessen Betrieb zu schaffen, mit denen eine optimale Leistungsverteilung der Antriebe unter wechselnden Reibwerten zwischen Rad / Schiene erzielt werden kann.The invention has for its object to provide a rail vehicle and a method for its operation, with which an optimal power distribution of the drives can be achieved with changing coefficients of friction between wheel / rail.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass der Motor für eine höhere Leistungsabgabe - als für den Betrieb des hydrodynamischen Antriebes erforderlich ist - ausgebildet ist, und dass dem Motor und dem hydrodynamischen Antrieb ein Pumpenverteilgetriebe zwischengeschalten ist, über welches die Fahrpumpe des hydrostatischen Antriebes zuschaltbar ist.According to the invention, this object is achieved in that the motor is designed for a higher power output than is required for the operation of the hydrodynamic drive, and in that a pump distribution gear is interposed between the motor and the hydrodynamic drive, via which the drive pump of the hydrostatic drive can be activated .

Diese Ausbildung gewährleistet eine sehr gute Übertragung der Antriebsleistung auf die Schiene. Dabei wird besonders unter oft wechselnden äußeren, wetter- und jahreszeitabhängigen Bedingungen und daraus resultierenden Änderungen des Reibwertes eine konstante Leistungsübertragung erzielt. Regen, Schnee und Eis aber auch Verschmutzung durch Schlamm oder Herbstlaub verändern den Reibwert denkbar ungünstig. Durch das erfindungsgemäße Zuschalten des hydrostatischen Antriebes und Antrieb mehrerer Achsen wird ein Durchdrehen aber auch ein Gleiten der Räder zuverlässig vermieden.This training ensures a very good transmission of the drive power to the rail. A constant power transmission is achieved especially under often changing external, weather and season-dependent conditions and the resulting changes in the coefficient of friction. Rain, snow and ice, but also dirt from mud or autumn leaves change the coefficient of friction extremely unfavorably. By connecting the hydrostatic drive and driving several axles according to the invention, spinning but also sliding of the wheels is reliably avoided.

Eine sinnvolle Weiterbildung ist dadurch verwirklicht, dass dem Pumpenverteilgetriebe mindestens eine weitere Hydraulikpumpe zum Betrieb mindestens eines weiteren Hydraulikantriebes für ein Arbeitsaggregat zugeordnet ist.A useful further development is realized in that at least one further hydraulic pump for operating at least one further hydraulic drive for a working unit is assigned to the pump distribution gear.

Mit einer derartigen Ausbildung können verschiedene Arbeitsaggregate, wie Kran, Hebebühne, Pflug oder auch eine Schneefräse mit einem optimal für den Betrieb für das jeweilige Aggregat ausgelegten, hydraulischen Antrieb angetrieben werden. Der aus Pumpe und Motor bestehende Antrieb kann den speziellen Erfordernissen gemäß dimensioniert werden, sodass ein wirtschaftlicher und leistungsangepasster Betrieb gewährleistet ist.With such a design, various work units, such as a crane, lifting platform, plow or even a snow blower, can be driven with a hydraulic drive that is optimally designed for operation for the respective unit. The drive consisting of pump and motor can be dimensioned according to the special requirements, so that an economical and performance-adjusted operation is guaranteed.

Die Aufgabe der Erfindung wird auch durch die Anwendung eines Verfahrens bei einem erfindungsgemäßen Schienenfahrzeug gelöst, indem - in Abhängigkeit eines Reibungswertes µ zwischen Schiene und Rad - der hydrostatische Antrieb zugeschaltet bzw. weggeschaltet wird.The object of the invention is also achieved by the use of a method in a rail vehicle according to the invention, in that Dependency of a friction value µ between rail and wheel - the hydrostatic drive is switched on or off.

Eine besonders vorteilhafte Ausbildung des Verfahrens wird durch folgende Schritte erzielt: a) Feststellen eines sinkenden Reibwertes µ bei Betrieb mit hydrodynamischem Antrieb, b) Einschalten des hydrostatischen Antriebes durch Einkuppeln der Fahrpumpe und des zweiten Fahrmotors, c) Erhöhen der Leistung des Motors, d) Betrieb des Schienenfahrzeuges mit hydrodynamischem und hydrostatischem Antrieb, e) bei Überschreiten einer kritischen Geschwindigkeit Reduzierung der Leistung des Motors, f) Ausschalten des hydrostatischen Antriebes durch Auskuppeln der Fahrpumpe und des Fahrmotors und g) Betrieb des Schienenfahrzeuges mit hydrodynamischem Antrieb.A particularly advantageous embodiment of the method is achieved by the following steps: a) determining a decreasing coefficient of friction µ when operating with a hydrodynamic drive, b) switching on the hydrostatic drive by engaging the drive pump and the second drive motor, c) increasing the power of the motor, d) Operation of the rail vehicle with hydrodynamic and hydrostatic drive, e) reduction of engine power when a critical speed is exceeded, f) switching off the hydrostatic drive by disengaging the drive pump and the drive motor and g) operation of the rail vehicle with hydrodynamic drive.

Derartige Verfahrensschritte ermöglichen einen zuverlässigen und sicheren Betrieb des Schienenfahrzeuges, welcher nahezu unabhängig von den bereits genannten, erschwerten Bedingungen durchgeführt werden kann. Ein gleichzeitiges Erhöhen der Motorleistung und Aufteilung dieser Leistung auf den hydrodynamischen und den hydrostatischen Antrieb ermöglicht einen vom ungünstigen Reibwert weitgehend unbeeinflussten Betrieb des Schienenfahrzeuges, wobei stets die erforderliche Adhäsion zwischen Schiene und Rad aufrechterhalten wird. Im höheren Geschwindigkeitsbereich ist eine erhöhte Motorleistung bzw. ein Antrieb auf mehrere Achsen nicht mehr erforderlich, deswegen kann das Schienenfahrzeug energiesparend wieder ausschließlich durch den hydrodynamischen Antrieb angetrieben werden.Such method steps enable reliable and safe operation of the rail vehicle, which can be carried out almost independently of the difficult conditions already mentioned. Simultaneously increasing the engine power and dividing this power between the hydrodynamic and hydrostatic drive enables the rail vehicle to be operated largely unaffected by the unfavorable coefficient of friction, while the required adhesion between the rail and the wheel is always maintained. In the higher speed range, an increased engine power or a drive on several axles is no longer necessary, which is why the rail vehicle can be driven again by the hydrodynamic drive to save energy.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die Erfindung wird nachfolgend in beispielhafter Weise unter Bezugnahme auf die beigefügten Figuren erläutert. Es zeigen:

  • Fig. 1 eine schematische Seitenansicht eines Schienenfahrzeuges,
  • Fig. 2 ein Antriebsschema des Schienenfahrzeuges und
  • Fig. 3 ein Geschwindigkeit / Zugkraftdiagramm.
The invention is explained below by way of example with reference to the accompanying figures. Show it:
  • Fig. 1 a schematic side view of a rail vehicle,
  • Fig. 2 a drive diagram of the rail vehicle and
  • Fig. 3 a speed / traction diagram.

Beschreibung der AusführungsformenDescription of the embodiments

In Fig. 1 ist ein als Gleisbaumaschine ausgebildetes Schienenfahrzeug 1 dargestellt. Dieses besteht im Wesentlichen aus einem auf einem ersten und einem zweiten Schienenfahrwerk 2, 3 abgestützten Fahrzeugrahmen 4. Das Schienenfahrzeug 1 weist ein von einem vorzugsweise als Verbrennungskraftmaschine ausgebildeten Motor 5 angetriebenes hydraulisches Antriebssystem 6 auf. Dieses umfasst einen dem ersten Schienenfahrwerk 2 zugeordneten hydrodynamischen Antrieb 7 und einen dem zweiten Schienenfahrwerk 3 zugeordneten hydrostatischen Antrieb 8. Letzterem ist - wie in Fig. 2 ersichtlich - eine mit einem Fahrmotor 9 verbundene Fahrpumpe 10 zugeordnet.In Fig. 1 A rail vehicle 1 designed as a track construction machine is shown. This essentially consists of a vehicle frame 4 supported on a first and a second rail undercarriage 2, 3. The rail vehicle 1 has a hydraulic drive system 6 which is driven by a motor 5 which is preferably designed as an internal combustion engine. This comprises a hydrodynamic drive 7 assigned to the first rail running gear 2 and a hydrostatic drive 8 assigned to the second rail running gear 3. The latter is - as in FIG Fig. 2 can be seen - assigned a drive pump 10 connected to a drive motor 9.

Der Motor 5 ist für eine höhere Leistungsabgabe - als für den Betrieb des hydrodynamischen Antriebes 7 erforderlich ist - ausgebildet. Dem Motor 5 und dem hydrodynamischen Antrieb 7 ist ein Pumpenverteilgetriebe 11 zwischengeschalten. Über dieses ist die Fahrpumpe 10 des hydrostatischen Antriebes 8 zuschaltbar.The motor 5 is designed for a higher power output than is required for the operation of the hydrodynamic drive 7. A pump distribution gear 11 is interposed between the motor 5 and the hydrodynamic drive 7. The drive pump 10 of the hydrostatic drive 8 can be activated via this.

Dem Pumpenverteilgetriebe 11 ist mindestens eine weitere Hydraulikpumpe 12 zum Betrieb mindestens eines weiteren Hydraulikantriebes 13 für ein Arbeitsaggregat 14 zugeordnet. Beispiele für solche Arbeitsaggregate 14 wären Kran 15, Hebebühne 16 oder Schneefräse 17. Dabei kann die Anzahl der weiteren Hydraulikpumpen 12 insofern variieren, als dass entweder jedem Arbeitsaggregat 14 eine eigene Hydraulikpumpe 12 zugeordnet ist, oder dass eine Hydraulikpumpe 12 abwechselnd eines der Arbeitsaggregate 14 antreibt.At least one further hydraulic pump 12 for operating at least one further hydraulic drive 13 for a working unit 14 is assigned to the pump distribution gear 11. Examples of such work units 14 would be crane 15, lifting platform 16 or snow blower 17. The number of further hydraulic pumps 12 can vary in that either each work unit 14 is assigned its own hydraulic pump 12, or that a hydraulic pump 12 alternately drives one of the work units 14 .

Im Folgenden wird der Betrieb des Schienenfahrzeugs 1 kurz beschrieben. Der Betrieb erfolgt in Abhängigkeit eines Reibwertes µ zwischen einer Schiene 18 und einem Rad 19, wobei der hydrostatische Antrieb 8 zugeschaltet oder weggeschaltet wird.The operation of the rail vehicle 1 is briefly described below. The operation takes place as a function of a coefficient of friction μ between a rail 18 and a wheel 19, the hydrostatic drive 8 being switched on or off.

Im Allgemeinen wird das Schienenfahrzeug 1 hauptsächlich mit dem hydrodynamischen Antrieb 7 bewegt. Mit Hilfe einer Messvorrichtung 20 wird der sinkende Reibwert µ festgestellt. Daraufhin erfolgt ein manuelles oder automatisches Einschalten des hydrostatischen Antriebes 8 durch Einkuppeln der Fahrpumpe 10 und des Fahrmotors 9. Bei Erhöhung der Leistung des Motors 5 wird das Schienenfahrzeug 1 jetzt mit hydrodynamischen und hydrostatischen Antrieb 7, 8 betrieben. Bei Überschreiten einer kritischen Geschwindigkeit vK wird die Leistung des Motors 5 wieder reduziert und der hydrostatische Antrieb 8 ausgeschaltet. Dies geschieht durch Auskuppeln der Fahrpumpe 10 und des Fahrmotors 9. Danach wird das Schienenfahrzeug 1 wieder nur mit dem hydrodynamischen Antrieb 7 angetrieben.In general, the rail vehicle 1 is mainly moved with the hydrodynamic drive 7. The falling coefficient of friction μ is determined with the aid of a measuring device 20. The hydrostatic drive 8 is then switched on manually or automatically by engaging the drive pump 10 and the drive motor 9 Power of the motor 5, the rail vehicle 1 is now operated with hydrodynamic and hydrostatic drive 7, 8. If a critical speed v K is exceeded, the power of the motor 5 is reduced again and the hydrostatic drive 8 is switched off. This is done by disengaging the drive pump 10 and the drive motor 9. The rail vehicle 1 is then driven again only by the hydrodynamic drive 7.

Wie aus dem in Fig. 3 dargestellten Diagramm erkennbar ist, liegt die kritische Geschwindigkeit vK bei etwa 50 km/h. Bis zu diesem Wert ist ein kombinierter Antrieb (hydrodynamisch und hydrostatisch) unter ausreichender Zugkraft Fz möglich. Bei höheren Geschwindigkeiten v genügt bereits ein Reibwert µ = 0,107 um die reduzierte Motorleistung über den hydrodynamischen Antrieb 7 einzusetzen.As from the in Fig. 3 the diagram shown can be seen, the critical speed v K is about 50 km / h. Up to this value, a combined drive (hydrodynamic and hydrostatic) is possible with sufficient traction Fz. At higher speeds v, a coefficient of friction µ = 0.107 is already sufficient to use the reduced engine power via the hydrodynamic drive 7.

Claims (4)

  1. A rail vehicle (1) having a vehicle frame (4) supported on on-track undercarriages (2, 3) and a hydraulic drive system (6) powered by a motor (5), the drive system (6) comprising a hydrodynamic drive (7) associated with a first on-track undercarriage (2) as well as a hydrostatic drive (8), associated with a second on-track undercarriage (3), with which is associated a drive pump (10) connected to a drive motor (9), characterized in that the motor (5) is designed for higher power output than necessary for the operation of the hydrodynamic drive (7), and that a pump distribution gear (11) is switched between the motor (5) and the hydrodynamic drive (7), via which the drive pump (10) of the hydrostatic drive (8) can be connected.
  2. A rail vehicle (1) according to claim 1, characterized in that at least one additional hydraulic pump (12) for operation of at least one additional hydraulic drive (13) for a work unit (14) is associated with the pump distribution gear (11).
  3. A method for operation of a rail vehicle (1) with a hydraulic drive system (6) according to claim 1 or 2, characterized in that the hydrostatic drive (8) is added or removed in dependence on a friction value µ between the rail (18) and wheel (19).
  4. A method according to claim 3, characterized by the following steps:
    a) detecting a sinking friction value µ during operation with hydrodynamic drive (7),
    b) switching the hydrostatic drive (7) on by engaging the drive pump (10) and the drive motor (9),
    c) increasing the output of the motor (5),
    d) operating the rail vehicle (1) with hydrodynamic and hydrostatic drive (7, 8),
    e) reducing the output of the motor (5) upon exceeding a critical speed vK,
    f) switching the hydrostatic drive (8) off by disengaging the drive pump (10) and the drive motor (9), and
    g) operating the rail vehicle (1) with hydrodynamic drive (7).
EP17726541.0A 2016-06-21 2017-05-26 Rail vehicle and method for operating a rail vehicle Active EP3472018B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATGM148/2016U AT15564U1 (en) 2016-06-21 2016-06-21 Rail vehicle and method for operating a rail vehicle
PCT/EP2017/000625 WO2017220182A1 (en) 2016-06-21 2017-05-26 Rail vehicle and method for operating a rail vehicle

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EP3472018A1 EP3472018A1 (en) 2019-04-24
EP3472018B1 true EP3472018B1 (en) 2020-07-15

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US (1) US11091177B2 (en)
EP (1) EP3472018B1 (en)
JP (1) JP6877468B2 (en)
CN (1) CN109562766B (en)
AT (1) AT15564U1 (en)
CA (1) CA3022474A1 (en)
EA (1) EA036624B1 (en)
ES (1) ES2813608T3 (en)
WO (1) WO2017220182A1 (en)

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AT17665U1 (en) 2020-12-28 2022-10-15 Plasser & Theurer Export Von Bahnbaumaschinen Gmbh Rail vehicle and method for operating the rail vehicle

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US11091177B2 (en) 2021-08-17
EA036624B1 (en) 2020-12-01
JP6877468B2 (en) 2021-05-26
WO2017220182A1 (en) 2017-12-28
ES2813608T3 (en) 2021-03-24
CA3022474A1 (en) 2017-12-28
CN109562766B (en) 2020-07-07
CN109562766A (en) 2019-04-02
EP3472018A1 (en) 2019-04-24
AT15564U1 (en) 2018-01-15
US20190144008A1 (en) 2019-05-16
EA201800532A1 (en) 2019-05-31
JP2019527161A (en) 2019-09-26

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