EP4676785A1 - Hydrodynamischer retarder mit arbeitsmediumtank - Google Patents
Hydrodynamischer retarder mit arbeitsmediumtankInfo
- Publication number
- EP4676785A1 EP4676785A1 EP24710689.1A EP24710689A EP4676785A1 EP 4676785 A1 EP4676785 A1 EP 4676785A1 EP 24710689 A EP24710689 A EP 24710689A EP 4676785 A1 EP4676785 A1 EP 4676785A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- working medium
- channel
- tank
- retarder
- hydrodynamic retarder
- 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.)
- Pending
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
- B60T10/00—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope
- B60T10/02—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope with hydrodynamic brake
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
-
- 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
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/08—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels using fluid or powdered medium
- B60T1/087—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels using fluid or powdered medium in hydrodynamic, i.e. non-positive displacement, retarders
-
- 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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/06—Applications or arrangements of reservoirs
-
- 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
- B60T5/00—Vehicle modifications to facilitate cooling of brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/005—Filling or draining of fluid systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D57/00—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders
- F16D57/04—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders with blades causing a directed flow, e.g. Föttinger type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
Definitions
- the invention relates to the structure of a hydrodynamic retarder for a motor vehicle, in particular the structure of the working medium tank of the retarder.
- Hydrodynamic retarders have a working chamber that can be filled with a working medium and then emptied from it. With the help of the working medium, a torque is transferred from a bladed rotor to a bladed stator.
- the working chamber When the working chamber is filled, the rotor and thus a shaft that is particularly designed to be non-rotatable with the rotor, for example a universal joint shaft or transmission output shaft indirectly connected to the wheels of a vehicle, are decelerated.
- a retarder and its working medium circuit are known from DE 10 2013 006 611A1.
- the rotor and stator of the retarder form a toroidal working chamber that is connected to a working medium circuit with a working medium tank via a duct system.
- the working chamber is ventilated via a ventilation system, through which air can escape into the environment through a connection between the working chamber and the environment.
- the working medium tank can be connected to a compressed air connection or the environment via a valve, the MRCU.
- the working medium tank In order to switch the retarder to braking mode, the working medium tank must be pressurized with compressed air via the MRCU so that the working medium is conveyed from the working medium tank into the working chamber via the filling channel.
- the filling channel is arranged in the working medium tank in such a way that its inlet opening ends in the lower area of the working medium tank, so that the inlet opening of the filling channel is always located below the working medium level and no air can get into the filling channel.
- the working medium tank When switching the retarder to non-braking mode, the working medium tank must be vented and the working chamber must be ventilated. The working medium is pumped from the retarder via the heat exchanger back into the working medium tank.
- the object of the invention is to propose a retarder with reduced manufacturing and assembly costs.
- a retarder comprising a retarder chamber in which a rotatably mounted rotor and a stator are arranged, which together form a working chamber that can be filled with and emptied from working medium.
- the retarder also comprises a working medium tank that has an area for receiving working medium that is not currently in the working chamber and an expansion area, at least one filling channel for supplying working medium into the working chamber and a return channel for discharging working medium from the working chamber, as well as a rotor housing, a stator housing and a tank housing.
- the working medium tank comprises a storage area and a sump area and that a coupling plane is arranged on the tank housing below the sump area, through which at least one second channel leads, which is suitable for direct or indirect coupling to the outlet of the primary side of a heat exchanger.
- a first channel can be arranged in the tank housing, via which a direct or indirect connection with the inlet of the primary side of the heat exchanger can be established.
- the first channel can be arranged above the second channel.
- This arrangement enables the sealing planes to be decoupled.
- the sealing plane between the tank housing and the intermediate part can thus be axial and radial, which simplifies production.
- the filling pipe extends into the sump area, with the inlet opening in the filling pipe being covered by at least 20mm to 50mm of working medium in every operating state. The inlet opening of the filling pipe is thus sufficiently immersed in the working medium in all operating states so that no air can be sucked in via the filling pipe. It is also advantageous if the inlet opening of the filling pipe is arranged centrally above the second channel.
- an intermediate component can be provided between the tank housing and the heat exchanger, wherein channels are integrated in the intermediate component, via which the first channel is connected to the inlet and the second channel is connected to the outlet of the primary side of the heat exchanger.
- Additional channels can also be integrated into the intermediate component, via which the secondary side of the heat exchanger can be connected to a cooling circuit.
- the intermediate component can be designed as a cast part with cast-in channels.
- a drain can be provided in the intermediate component, via which the working medium can be drained from the working medium tank and the primary circuit of the heat exchanger.
- a second drain is provided on the intermediate component, via which cooling medium can be drained from the secondary circuit of the heat exchanger.
- Figure 1 shows a sketch showing the basic structure of the retarder 1.
- the outer shell of the retarder 1 consists essentially of 2 parts, the rotor housing 2 and the stator housing 3, each of which forms a half shell of the housing.
- the housing parts 2 and 3 enclose a cavity, whereby the Cavity is divided into three areas.
- a cavity area 27, a storage area 26 and a retarder area 29 are provided.
- the cavity region 27, the storage region 26 and the sump region 25 together form the working medium tank 15, wherein the working medium 9 collects in the storage region 26 and sump region 25 when the retarder is switched to non-braking mode.
- the cavity area 27 is a space that is essentially designed to ensure that no working medium can enter the compressed air control unit, also known as MRCU, via the connection 17.
- a working medium separator or oil separator 28 is provided between the connection 17 and the working medium tank 15. Separating oil can return to the working medium tank 15 via the drain 30.
- the compressed air control regulates the braking torque of the retarder 1 .
- the area between the rotor housing 2 and the stator housing 3 is referred to as the retarder area 29.
- the rotor 6, the stator 7, the mounted rotor shaft 8 and channels for guiding the working medium are arranged in the retarder area 29.
- the rotor 6 can be arranged axially displaceably on the rotor shaft 8, as is known from the prior art.
- a coupling plane 18 is provided on the tank housing 4 to which a heat exchanger 11 can be attached directly or indirectly, with a first channel 19 and a second channel 20 being provided in the coupling plane 18.
- the working chamber 14, between the rotor 6 and stator 7, is connected to the flow connection of the heat exchanger 11 via the first channel 19, and the outlet of the heat exchanger 11 is connected to the working medium tank 15 via the second channel 20.
- the cooled working medium 9 enters the working medium tank 15 via the second channel 20 when switching to non-braking mode, i.e. when the pressure in the expansion region 27 drops.
- a filling channel 12 is provided, which establishes a connection from the lower sump area 25 into the inlet chamber 23, which in turn is connected to the working chamber 14 via channels in the stator 7, not shown.
- the air pressure in the expansion area 27 is increased via the connection 17, whereby the working medium 9 reaches the working chamber 14 via the filling channel 12, the inlet chamber 23 and the channels in the stator 7.
- the known pumping effect of the retarder 1 causes the working medium 9 to be pumped back out of the working chamber via the return channel 13, the first channel 19, the heat exchanger 11 and the second channel 20 into the working medium tank 15.
- the filling channel 12 is arranged opposite the second channel 20 in such a way that working medium 9 flowing out of the second channel 20 can flow into the filling channel 12 via the inlet opening 21.
- a circulating flow is created, with the working medium 9 flowing through the working medium tank 15 over a short section.
- the distance between the outlet from the second channel 20 and the inlet opening 21 can be selected between 1 mm and 15 mm, with the mixing of working medium 9 from the tank and working medium 9 from the circuit depending on the distance.
- the minimum working medium level in the working medium tank 15 must be above the inlet opening 21 to ensure that no air gets into the filling channel 12.
- the pressure of the control air in the expansion area 27 regulates the volume of the working medium in the circuit, which in turn determines the braking torque of the retarder.
- This control of the braking torque is standard and is therefore not described in more detail.
- Figure 2 shows an alternative design of the lower part of the oil tank with sump and intermediate component 33. This design differs essentially from the representation in Figure 1 in that the first channel 19 is arranged higher than the second channel 20.
- the working medium 9 enters the retarder circuit via the filling pipe 12 and, during braking, a working medium flow exits from the second channel 20 after passing through the heat exchanger 11, briefly flows through the working medium tank 15 and enters the filling pipe 12 via the inlet opening 21.
- the position of the first channel 19 can be chosen arbitrarily, since the return channel 13 is connected here, which creates a direct connection to the working chamber 14.
- the return channel 13 can be a channel that is cast in one or more of the following parts, the rotor housing 2, the stator housing 3 and/or the tank housing 4.
- the return channel can also be designed as a pipe.
- the arrangement on a different level enables, among other things, different sealing concepts so that tolerances can be better compensated.
- the sectional view of the intermediate component 33 also shows an example of the course of the channels 34a, 34b for the working medium 9 and the channels 35a, 35b for the cooling water.
- An outlet 30a, 30b is provided for both the working medium circuit and the cooling water circuit.
- the working medium can drain completely from the working medium circuit of the retarder via the outlet 30a for the working medium.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023105956.4A DE102023105956B4 (de) | 2023-03-10 | 2023-03-10 | Hydrodynamischer Retarder mit Arbeitsmediumtank |
| PCT/EP2024/055939 WO2024188778A1 (de) | 2023-03-10 | 2024-03-07 | Hydrodynamischer retarder mit arbeitsmediumtank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4676785A1 true EP4676785A1 (de) | 2026-01-14 |
Family
ID=90364094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP24710689.1A Pending EP4676785A1 (de) | 2023-03-10 | 2024-03-07 | Hydrodynamischer retarder mit arbeitsmediumtank |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20260009410A1 (de) |
| EP (1) | EP4676785A1 (de) |
| CN (1) | CN120769817A (de) |
| DE (1) | DE102023105956B4 (de) |
| WO (1) | WO2024188778A1 (de) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2405740A1 (de) * | 1974-02-07 | 1975-08-21 | Daimler Benz Ag | Dauerbremse fuer kraftfahrzeuge, insbesondere fuer schwere nutzfahrzeuge |
| DE2710870A1 (de) * | 1977-03-12 | 1978-09-14 | Daimler Benz Ag | Hydrodynamischer retarder fuer fahrzeuge, insbesondere fuer kraftfahrzeuge |
| DE4442219A1 (de) * | 1994-11-26 | 1995-06-01 | Voith Turbo Kg | Bremsanlage mit einem hydrodynamischen Retarder, insbesondere für Kraftfahrzeuge |
| DE102009016817B4 (de) * | 2009-04-09 | 2010-11-25 | Voith Patent Gmbh | Verfahren zum Einstellen eines exakten Füllstandes des Kühlmediums in einem Fahrzeugkühlkreislauf |
| DE102010026274A1 (de) * | 2010-07-06 | 2012-01-12 | Voith Patent Gmbh | Bremsanlage und Verfahren zum Einstellen eines Bremsmomentes einer solchen |
| DE102012004332A1 (de) * | 2012-03-07 | 2013-09-12 | Voith Patent Gmbh | Hydrodynamischer Retarder und Verfahren zum Steuern der Leistungsübertragung eines solchen |
| DE102013006611A1 (de) | 2013-04-17 | 2014-10-23 | Voith Patent Gmbh | Hydrodynamischer Retarder |
| CN104595386B (zh) * | 2014-07-08 | 2015-09-30 | 武汉理工大学 | 液力缓速器用减空损装置 |
| DE102015201910A1 (de) * | 2015-02-04 | 2016-08-04 | Voith Patent Gmbh | Arbeitsmediumkreislauf für eine hydrodynamische Maschine |
| TR201714018A2 (tr) * | 2017-09-21 | 2019-04-22 | Ford Otomotiv Sanayi As | Soğutmali retarder si̇stemi̇ |
| SE545818C2 (en) * | 2020-08-31 | 2024-02-13 | Scania Cv Ab | Coolant Circuit, Hydrodynamic Retarder Arrangement, and Vehicle |
-
2023
- 2023-03-10 DE DE102023105956.4A patent/DE102023105956B4/de active Active
-
2024
- 2024-03-07 EP EP24710689.1A patent/EP4676785A1/de active Pending
- 2024-03-07 CN CN202480017439.7A patent/CN120769817A/zh active Pending
- 2024-03-07 WO PCT/EP2024/055939 patent/WO2024188778A1/de not_active Ceased
-
2025
- 2025-09-10 US US19/324,818 patent/US20260009410A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024188778A1 (de) | 2024-09-19 |
| DE102023105956A1 (de) | 2024-09-12 |
| DE102023105956B4 (de) | 2024-09-19 |
| US20260009410A1 (en) | 2026-01-08 |
| CN120769817A (zh) | 2025-10-10 |
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Legal Events
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