DE102006030141A1 - Pressure supply unit for hydraulic systems comprises electric motor which feeds fluid to two cylinders via pipes fitted with non-return valves, cylinders also being fitted with return flow pipes each of which also has non-return valve - Google Patents
Pressure supply unit for hydraulic systems comprises electric motor which feeds fluid to two cylinders via pipes fitted with non-return valves, cylinders also being fitted with return flow pipes each of which also has non-return valve Download PDFInfo
- Publication number
- DE102006030141A1 DE102006030141A1 DE200610030141 DE102006030141A DE102006030141A1 DE 102006030141 A1 DE102006030141 A1 DE 102006030141A1 DE 200610030141 DE200610030141 DE 200610030141 DE 102006030141 A DE102006030141 A DE 102006030141A DE 102006030141 A1 DE102006030141 A1 DE 102006030141A1
- Authority
- DE
- Germany
- Prior art keywords
- valve
- return
- flow
- actuator
- piston
- 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.)
- Ceased
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
- 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
- B60T13/58—Combined or convertible systems
- B60T13/588—Combined or convertible systems both fluid and mechanical assistance or drive
-
- 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
- B60T13/12—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 the fluid being liquid
- B60T13/16—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 the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
- B60T13/168—Arrangements for pressure supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B5/00—Machines or pumps with differential-surface pistons
- F04B5/02—Machines or pumps with differential-surface pistons with double-acting pistons
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
Description
Die Erfindung betrifft ein Druckerzeugungsaggregat zum Bereitstellen eines Volumenstroms zum Antrieb mindestens eines Aktuators.The The invention relates to a pressure generating unit for providing a volume flow for driving at least one actuator.
Derartige Druckerzeugungsaggregate sind aus der Praxis bekannt. Sie finden beispielsweise im Zusammenhang mit einer hydraulischen Bremsanlage oder der Druckversorgung bei automatischen Getrieben von Kraftfahrzeugen Verwendung. Der vom Druckerzeugungsaggregat bereitgestellte Volumenstrom (Volumen pro Zeiteinheit) dient dem Antreiben von Aktuatoren, beispielsweise zwecks Schalten, Wählen, Kuppeln.such Pressure generating units are known from practice. you find For example, in connection with a hydraulic brake system or the pressure supply in automatic transmissions of motor vehicles Use. The volumetric flow provided by the pressure generator (Volume per unit time) is used to drive actuators, for example for switching, selecting, Couple.
Aus der Praxis ist es bekannt, zur Bereitstellung eines hydraulischen Volumenstroms einen Elektromotor zu verwenden, der mit einer Außenzahnradpumpe verbunden ist. Diese ist wiederum mit einem Tank und einem Hydraulikspeicher verbunden. Durch den Speicher lässt sich hydraulische Energie bevorraten, die dann in kurzer Zeit abrufbar ist. Der Motor muss nicht bei jeder Systemanforderung getätigt werden, da er über den Speicher vom System entkoppelt ist.Out In practice, it is known to provide a hydraulic Volumetric flow to use an electric motor with an external gear pump connected is. This is in turn with a tank and a hydraulic accumulator connected. Leaves through the store stockpile hydraulic energy, which can then be retrieved in a short time is. The engine does not have to be made on every system request, since he over the memory is decoupled from the system.
Aus
der
Bei diesem Druckerzeugungsaggregat weist der den Volumenstrom bereitstellende Hydraulikzylinder zwei beim Betätigen des Bremspedals verstellbare Kolben auf. Nur bei einer Bewegung der Kolben in eine Richtung wird ein Volumen für die Anwendung im System, d. h. für die Betätigung der Aktuatoren, bereitgestellt.at this pressure generating unit has the volume flow providing Hydraulic cylinder two when pressed the brake pedal adjustable piston on. Only with one movement the piston in one direction becomes a volume for use in the system, d. H. For the operation the actuators, provided.
Eine
hydraulische Stellvorrichtung zur Betätigung einer Kupplung, insbesondere
für Kraftfahrzeuge,
ist ferner aus der
Aufgabe der vorliegenden Erfindung ist es, ein Druckerzeugungsaggregat zum Bereitstellen eines Volumenstroms zum Antrieb mindestens eines Aktuators zu schaffen, bei dem in beiden Bewegungsrichtungen des Kolbens ein Volumenstrom dem System bereitgestellt werden kann.task The present invention is a pressure generating unit for Providing a volume flow to drive at least one actuator to create, in which in both directions of movement of the piston Volume flow can be provided to the system.
Diese Aufgabe wird durch ein Druckerzeugungsaggregat mit den Merkmalen des Anspruches 1 gelöst. Somit wird in beiden Kolbenbewegungsrichtungen ein Volumenstrom für das System, demnach für den bzw. für die Aktuatoren bereitgestellt. In der einen Bewegungsrichtung des Kolbens wird Hydraulikflüssigkeit aus der einen ersten Zylinderkammer in die dieser Kammer zugeordnete Druckleitung gefördert, bei gleichzeitigem Nachströmen von Hydraulikflüssigkeit in die andere zweite Zylinderkammer durch die dieser Kammer zugeordnete Rückflussleitung. Beim Bewegen des Kolbens in die entgegengesetzte Richtung strömt Hydraulikflüssigkeit von der zweiten Kammer in die Druckleitung und es fließt Hydraulikflüssigkeit in die erste Kammer über die dieser zugeordnete Rückflussleitung nach.These Task is by a pressure generating unit with the features of claim 1 solved. Thus, in both piston movement directions, a volume flow for the System, therefore, for the or for provided the actuators. In the one direction of movement of Piston becomes hydraulic fluid from a first cylinder chamber in the associated with this chamber Delivery line, with simultaneous afterflow of hydraulic fluid in the other second cylinder chamber through which this chamber associated Return line. As the piston moves in the opposite direction, hydraulic fluid flows from the second chamber into the pressure line and hydraulic fluid is flowing into the first chamber over the associated return line to.
Das erfindungsgemäße Druckerzeugungsaggregat findet im Zusammenhang mit einem oder mehreren Aktuatoren für die unterschiedlichsten Anwendungszwecke Verwendung: So beispielsweise für die bereits angesprochene Druckversorgung bei der Automatisierung von KfZ-Getrieben unter dem Aspekt des Schaltens, Wählens, Kuppelns. Weitere Anwendungen sind beispielsweise Doppelkupplungsgetriebe, Servolenkung, Fahrwerksysteme, Bremssysteme, z. B. ABS, ferner Nockenwellenverstellung, Kühlung, Schmierung, sonstige hydraulische Nebenaggregate im Fahrzeug, ferner Anwendungen bei x-y-Wire, z. B. clutch-, brake-, shift-by-wire.The Pressure generating unit according to the invention takes place in connection with one or more actuators for the most diverse Applications Use: For example, for the already mentioned Pressure supply in the automation of automotive gearboxes under the aspect of switching, choosing, Coupling. Other applications include dual-clutch transmissions, Power steering, suspension systems, brake systems, z. B. ABS, also camshaft adjustment, Cooling, Lubrication, other hydraulic ancillaries in the vehicle, further Applications with x-y-wire, z. B. clutch, brake, shift-by-wire.
Aufgrund der erfindungsgemäßen Gestaltung des Druckerzeugungsaggregats ist eine permanente Volumenförderung durch Doppelhub gewährleistet, womit die zeitliche Verfügbarkeit des Systems hoch ist. Es ergibt sich ein Bauraumvorteil durch kleinere Motor- und somit Aggregatbauweise. Auch lässt sich die Dynamik durch eine kleinere Motorbauweise verbessern.by virtue of the design of the invention the pressure generating unit is a permanent volume promotion ensured by double stroke, with which the temporal availability of the system is high. This results in a space advantage by smaller Motor and thus aggregate construction. Also, the dynamics can be through to improve a smaller engine design.
Vorzugsweise sind mehrere Aktuatoren, insbesondere zwei Aktuatoren vorgesehen. Der jeweilige Aktuator ist vorteilhaft als Stellzylinder ausgebildet, insbesondere mit beidseitig hydraulisch beaufschlagbarem Stellkolben oder einseitig, entgegen Federkraft, hydraulisch beaufschlagbarem Stellkolben. Zum Ansteuern des jeweiligen Aktuators ist ein Ventil vorgesehen, das beispielsweise, je nach Ausbildung des Aktuators als 4/3-Wegeventil oder 3/2-Wegeventil ausgebildet ist. Das jeweilige Ventil ist insbesondere als Magnetventil gestaltet.Preferably a plurality of actuators, in particular two actuators are provided. The respective actuator is advantageously designed as a positioning cylinder, in particular with hydraulically actuated on both sides actuating piston or on one side, against spring force, hydraulically acted upon Adjusting piston. To control the respective actuator is a valve provided, for example, depending on the design of the actuator is designed as a 4/3-way valve or 3/2-way valve. The respective Valve is designed in particular as a solenoid valve.
Nach einer vorteilhaften Weiterbildung der Erfindung ist vorgesehen, dass die jeweilige Rückflussleitung, zwischen der Ventilanordnung und der Einrichtung, die den Fluss des Hydraulikmediums von der dieser Rückflussleitung zugeordneten Kammer zum Aktuator sperrt, mit einem Hydraulikmedium aufnehmenden Behälter verbunden ist. Der derart vom Hydraulikzylinder getrennte Behälter, der die Funktion eines Vorratsbehälters erfüllt, ermöglicht bei eventuell vorhandener Leckage oder Veränderung des Arbeitspunktes nachgeschalteter Aktuatoren, das Hydraulikmedium nachfließen zu lassen.According to an advantageous embodiment of The invention provides that the respective return flow line, between the valve arrangement and the device which blocks the flow of the hydraulic medium from the chamber associated with this return line to the actuator, is connected to a container receiving hydraulic medium. The container thus separated from the hydraulic cylinder, which fulfills the function of a storage container, makes it possible for any existing leakage or change in the operating point of downstream actuators to allow the hydraulic medium to flow.
Zweckmäßig sind die beiden Druckleitungen zwischen den Einrichtungen, die den Fluss des Hydraulikmediums zu den Kammern sperren, und der Ventilanordnung zusammengeführt. Auch die beiden Rückflussleitungen sind vorzugsweise zwischen den Einrichtungen, die den Fluss des Hydraulikmediums von den Kammern zu mindestens einem Aktuator sperren, und der Ventilanordnung zusammengeführt. Hierdurch wird erreicht, dass die Druckleitungen und/oder die Rückflussleitungen nur im Bereich der diesen zugeordneten Sperreinrichtungen separat geführt sind und dort die Druckleitungen einerseits und die Rückflussleitungen andererseits zusammengefasst werden können. Dies reduziert den Bauaufwand bei dem erfindungsgemäßen Erzeugungsaggregat signifikant.Are useful the two pressure lines between the facilities, the river lock the hydraulic medium to the chambers, and the valve assembly merged. Also the two return lines are preferably between the facilities that control the flow of Lock hydraulic fluid from the chambers to at least one actuator, and the valve assembly merged. This will achieve that the pressure lines and / or the return lines only in the area the associated locking devices are performed separately and there the pressure lines on the one hand and the return lines on the other can be summarized. This reduces the construction costs in the generating unit according to the invention significant.
Die Einrichtungen zum Sperren des Flusses durch die Druckleitungen und Rückflussleitungen können auf unterschiedlichste Art und Weise gestaltet sein. Die Sperrfunktion lässt sich einfach und kostengünstig durch Rückschlagventile bewerkstelligen. Vorteilhaft sind gleichfalls Membranventile oder elektrisch ansteuerbare Sperrventile.The Devices for blocking the flow through the pressure pipes and Return lines can open be designed in a variety of ways. The lock function let yourself easy and inexpensive through check valves accomplish. Also advantageous are diaphragm valves or electrically controllable shut-off valves.
Der Antrieb zum Verstellen des Kolbens kann unterschiedlich gestaltet sein. Bevorzugt, da ein solcher Antrieb baulich sehr einfach gestaltet sein kann, wird es angesehen, wenn der Antrieb als Elektromotor ausgebildet ist, insbesondere als Elektromotor, der über eine Spindel den Kolben des Hydraulikzylinders bewegt.Of the Drive for adjusting the piston can be designed differently be. Preferably, since such a drive structurally very simple can be, it is viewed when the drive as an electric motor is formed, in particular as an electric motor, via a Spindle moves the piston of the hydraulic cylinder.
Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ein Ausführungsbeispiel der Erfindung ist, ohne hierauf beschränkt zu sein, anhand der Zeichnung näher erläutert.preferred Further developments of the invention will become apparent from the dependent claims and the following description. An embodiment of the invention is without limitation to be closer to the drawing explained.
Dabei zeigt:there shows:
Ein
durch die strichlierten Linien veranschaulichtes Hydraulikaggregat
Jede
Kammer
Die
Kammer
The chamber
Die
Kammer
Aufgrund
des Umstandes, dass jede der beiden Kammern
Beim
Betätigen
des Elektromotors
Im
Ausführungsbeispiel
ist die Ansteuerung der beiden Aktuatoren
Der
andere Aktuator
Die
Kammer
- 11
- Hydraulikaggregathydraulic power unit
- 22
- Hydraulikzylinderhydraulic cylinders
- 33
- Kolbenpiston
- 44
- Antriebdrive
- 55
- erste Kammerfirst chamber
- 66
- zweite Kammersecond chamber
- 77
- Spindelspindle
- 88th
- Druckleitungpressure line
- 99
- RückflussleitungReturn line
- 1010
- Magnetventilmagnetic valve
- 1111
- Magnetventilmagnetic valve
- 1212
- Aktuatoractuator
- 1313
- Aktuatoractuator
- 1414
- Vorratsbehälterreservoir
- 1515
- Hydraulikflüssigkeithydraulic fluid
- 1616
- Abschnittsection
- 1717
- Rückschlagventilcheck valve
- 1818
- Abschnittsection
- 1919
- Rückschlagventilcheck valve
- 2020
- Abschnittsection
- 2121
- Abschnittsection
- 2222
- Rückschlagventilcheck valve
- 2323
- Abschnittsection
- 2424
- Rückschlagventilcheck valve
- 2525
- Abschnittsection
- 2626
- Leitungmanagement
- 2727
- Federfeather
- 2828
- Kolbenpiston
- 2929
- Kammerchamber
- 3030
- Leitungmanagement
- 3131
- Abschnittsection
- 3232
- Abschnittsection
- 3333
- Kolbenpiston
- 3434
- erste Kammerfirst chamber
- 3535
- zweite Kammersecond chamber
- 3636
- Leitungmanagement
- 3737
- Leitungmanagement
- 3838
- Abschnittsection
- 3939
- Abschnittsection
- AA
- Bewegungsrichtung des Kolbensmovement direction of the piston
- BB
- Bewegungsrichtung des Kolbensmovement direction of the piston
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610030141 DE102006030141A1 (en) | 2006-06-29 | 2006-06-29 | Pressure supply unit for hydraulic systems comprises electric motor which feeds fluid to two cylinders via pipes fitted with non-return valves, cylinders also being fitted with return flow pipes each of which also has non-return valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610030141 DE102006030141A1 (en) | 2006-06-29 | 2006-06-29 | Pressure supply unit for hydraulic systems comprises electric motor which feeds fluid to two cylinders via pipes fitted with non-return valves, cylinders also being fitted with return flow pipes each of which also has non-return valve |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006030141A1 true DE102006030141A1 (en) | 2008-01-03 |
Family
ID=38776932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200610030141 Ceased DE102006030141A1 (en) | 2006-06-29 | 2006-06-29 | Pressure supply unit for hydraulic systems comprises electric motor which feeds fluid to two cylinders via pipes fitted with non-return valves, cylinders also being fitted with return flow pipes each of which also has non-return valve |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102006030141A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010023865A1 (en) * | 2010-06-15 | 2011-12-15 | Lucas Automotive Gmbh | Hydraulic pressure generator for a vehicle brake system |
DE102013111974A1 (en) * | 2013-10-30 | 2015-04-30 | Ipgate Ag | Actuating device for a vehicle brake |
DE102014111594A1 (en) | 2014-08-13 | 2016-02-18 | Ipgate Ag | Actuation system, in particular for a vehicle brake, and method for operating the actuation system |
CN107709723A (en) * | 2015-06-26 | 2018-02-16 | 斯堪尼亚商用车有限公司 | Retarder device |
US10112592B2 (en) | 2013-09-16 | 2018-10-30 | Ipgate Ag | Braking device and method for operating a breaking device |
US10421447B2 (en) | 2013-09-16 | 2019-09-24 | Ipgate Ag | Electrically-driven pressure regulator and volume-delivery unit |
DE102018122305A1 (en) * | 2018-09-12 | 2020-03-12 | Fte Automotive Gmbh | Pump unit for providing a hydraulic pressure for actuating an actuator in the drive train of a motor vehicle |
CN113147705A (en) * | 2021-06-04 | 2021-07-23 | 吉林大学 | Brake system for unmanned vehicle |
DE102020111492A1 (en) | 2020-04-28 | 2021-10-28 | Schaeffler Technologies AG & Co. KG | Hydraulic arrangement |
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US2398165A (en) * | 1943-06-11 | 1946-04-09 | Stelzer William | Hydraulic booster |
US3012509A (en) * | 1957-03-22 | 1961-12-12 | Mercier Jean | Differential pumps |
DE1653411A1 (en) * | 1967-01-02 | 1971-09-02 | Werner Ditscheid | Double acting piston pump |
DE2155624B2 (en) * | 1971-11-09 | 1976-11-18 | Siemens AG, 1000 Berlin und 8000 München | DOUBLE ACTING PISTON PUMP FOR HELIUM |
DE19618489C2 (en) * | 1995-09-12 | 2000-01-05 | Fte Automotive Gmbh | Hydraulic brake system, in particular for motor vehicles |
EP0984185A2 (en) * | 1998-09-02 | 2000-03-08 | FTE automotive GmbH | Hydraulic actuating device for operating an automotive clutch |
DE19738524C2 (en) * | 1996-09-04 | 2001-10-04 | Aisin Seiki | Piston pump for generating a fluid pressure |
-
2006
- 2006-06-29 DE DE200610030141 patent/DE102006030141A1/en not_active Ceased
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2398165A (en) * | 1943-06-11 | 1946-04-09 | Stelzer William | Hydraulic booster |
US3012509A (en) * | 1957-03-22 | 1961-12-12 | Mercier Jean | Differential pumps |
DE1653411A1 (en) * | 1967-01-02 | 1971-09-02 | Werner Ditscheid | Double acting piston pump |
DE2155624B2 (en) * | 1971-11-09 | 1976-11-18 | Siemens AG, 1000 Berlin und 8000 München | DOUBLE ACTING PISTON PUMP FOR HELIUM |
DE19618489C2 (en) * | 1995-09-12 | 2000-01-05 | Fte Automotive Gmbh | Hydraulic brake system, in particular for motor vehicles |
DE19738524C2 (en) * | 1996-09-04 | 2001-10-04 | Aisin Seiki | Piston pump for generating a fluid pressure |
EP0984185A2 (en) * | 1998-09-02 | 2000-03-08 | FTE automotive GmbH | Hydraulic actuating device for operating an automotive clutch |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9487201B2 (en) | 2010-06-15 | 2016-11-08 | Lucas Automotive Gmbh | Hydraulic pressure generator for a vehicle brake system, vehicle brake system having such a hydraulic pressure generator, and method for operating the hydraulic pressure generator |
DE102010023865A1 (en) * | 2010-06-15 | 2011-12-15 | Lucas Automotive Gmbh | Hydraulic pressure generator for a vehicle brake system |
DE102010023865B4 (en) | 2010-06-15 | 2024-03-28 | Zf Active Safety Gmbh | Hydraulic pressure generator for a vehicle brake system |
US10112592B2 (en) | 2013-09-16 | 2018-10-30 | Ipgate Ag | Braking device and method for operating a breaking device |
US10421447B2 (en) | 2013-09-16 | 2019-09-24 | Ipgate Ag | Electrically-driven pressure regulator and volume-delivery unit |
DE112014004233B4 (en) | 2013-09-16 | 2023-08-03 | Ipgate Ag | Braking device and method for operating a braking device |
US11104317B2 (en) | 2013-09-16 | 2021-08-31 | Ipgate Ag | Brake device and method for operating a brake device |
DE102013111974A1 (en) * | 2013-10-30 | 2015-04-30 | Ipgate Ag | Actuating device for a vehicle brake |
DE112015003240B4 (en) | 2014-08-13 | 2023-02-09 | Ipgate Ag | Actuation system, in particular for a vehicle brake and method for operating the actuation system |
DE102014111594A1 (en) | 2014-08-13 | 2016-02-18 | Ipgate Ag | Actuation system, in particular for a vehicle brake, and method for operating the actuation system |
US10759404B2 (en) | 2014-08-13 | 2020-09-01 | Ipgate Ag | Actuation system, in particular for a vehicle brake, and method for operating the actuation system |
CN107709723A (en) * | 2015-06-26 | 2018-02-16 | 斯堪尼亚商用车有限公司 | Retarder device |
US11242869B2 (en) | 2018-09-12 | 2022-02-08 | Fte Automotive Gmbh | Pump unit for providing a hydraulic pressure for actuating an actuator in the drive train of a motor vehicle |
DE102018122305A1 (en) * | 2018-09-12 | 2020-03-12 | Fte Automotive Gmbh | Pump unit for providing a hydraulic pressure for actuating an actuator in the drive train of a motor vehicle |
DE102020111492A1 (en) | 2020-04-28 | 2021-10-28 | Schaeffler Technologies AG & Co. KG | Hydraulic arrangement |
CN113147705B (en) * | 2021-06-04 | 2022-05-27 | 吉林大学 | Brake system for unmanned vehicle |
CN113147705A (en) * | 2021-06-04 | 2021-07-23 | 吉林大学 | Brake system for unmanned vehicle |
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