EP1318305A2 - Flügelzellenpumpe - Google Patents
Flügelzellenpumpe Download PDFInfo
- Publication number
- EP1318305A2 EP1318305A2 EP02026053A EP02026053A EP1318305A2 EP 1318305 A2 EP1318305 A2 EP 1318305A2 EP 02026053 A EP02026053 A EP 02026053A EP 02026053 A EP02026053 A EP 02026053A EP 1318305 A2 EP1318305 A2 EP 1318305A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- vane pump
- pump according
- cam ring
- rear wing
- 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.)
- Withdrawn
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
- F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
- F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
- F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C2/3441—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
- F04C2/3442—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
Definitions
- the invention relates to a vane pump for generating of a pressure medium flow to a consumer according to the preamble of claim 1.
- Such vane pumps with variable displacement volume are well known from practice and have a mostly circular curve ring, its eccentricity and thus the displacement volume of the Pump can be changed continuously.
- In Slots of the rotor are slidably guided blades, which divide the working chamber into production chambers. With this pump principle there are pump pressure and Pump suction side opposite. The displacement of the cam ring takes place through the system pressure, whereby the curve ring rolls in the pump housing when adjusting or shifts.
- the eccentricity of the cam ring is changed generally with the help of hydraulic actuating pistons which are arranged perpendicular to the conveying direction.
- the smaller control piston is always with the High pressure is applied and presses the cam ring against the larger control piston, depending on the operating state shut off by a control valve, with Pressure is applied or relieved. Accordingly the cam ring is held or moves in one direction or another.
- the provision in a starting position is made by a spring, the supports smaller actuating pistons.
- the pressure applied to the actuating pistons is made directly from the pump pressure side High pressure duct or the main pressure line removed. This pressure is also applied to the rear wing oil duct, so that those guided in the slots of the rotor The wing is pressurized on the inside and pressed against the curve ring.
- Vane pumps with one are also practical Power control known in those with an orifice the pumped fluid flow is accumulated.
- the differential pressure then acts on an actuating piston on the pressure side of the cam ring and on one Adjusting piston on the opposite side. Becomes a certain differential pressure at a certain Speed is reached, the cam ring is shifted and consequently the volume of the delivery chambers is reduced.
- the present invention is based on the object to solve the disadvantages of the prior art, in particular a simple and inexpensive to manufacture Vane pump with an advantageous Control the eccentricity of the cam ring to create at, even at low and medium speeds, optimal efficiency and low power consumption is feasible.
- the pressure medium can be accumulated on an orifice plate, so that the differential pressure on the actuators acts.
- the orifice plate can be designed in this way or be arranged that on an actuating device the higher, increasing with increasing speed increasing pressure of the rear wing oil chamber and on the other control device the smaller by the aperture Pressure is present.
- the lower pressure can correspond to the pressure on the pump pressure side.
- the orifice plate can advantageously in a bypass line be arranged by the rear wing oil passage or the one with the higher pressure Actuator leading into the main pressure line. Before the bypass line into the main pressure line opens, the bypass line leads from the with the lower pressure side of the orifice plate by means of a branch line directly to that for the lesser Pressure trained actuator.
- the solution according to the invention enables control the vane pump by the speed proportional increasing pressure in the rear wing oil passage without complex, constructive measures are necessary or Power loss at low or medium speed ranges have to be accepted.
- bypass line As an additional measure to the displacement of the cam ring or the reduction of the stroke in the delivery chambers, the course of the Pressure medium flow to the consumer in an advantageous manner Way to be influenced. It can be an excess Pressure medium flow through the bypass line in energetic advantageously to the suction port or Pump suction side returned and a pressure medium flow be fed from an oil tank.
- bypass valve and moving the cam ring can a defined course of the pressure medium flow to the consumer.
- there can also be a falling course of the pressure medium flow can be realized with increasing pump speed. This is particularly beneficial when it comes to the consumer to power steering of a motor vehicle acts because at higher pump speeds also Driving speed of the motor vehicle accordingly is higher, so that a higher steering resistance the driving dynamics and improves the driving experience.
- a particularly advantageous overlaid bypass control is described in WO 99/19629 A1. It is the cross-sectional area of the diaphragm with increasing, on the aperture pressure can be enlarged.
- the piston is in contact with the orifice Pressure can only be moved against the force of a spring, so that the cross-sectional area of the aperture is changeable depending on the pressure.
- the piston can therefore fast and depending on the delivery pressure to adjust.
- the piston is in a position in of the cross-sectional area of the panel partially closed is. With increasing pressure the begins To move the piston against the spring.
- the open cross-sectional area of the panel enlarged.
- bypass pressure medium flow through an intersection or an injector Pressure medium flow can be supplied to the suction zone of the working chamber is.
- the vane pump has a pump suction side 1 a suction port 2 and a pump pressure side 3.
- the pump pressure side 3 is by means of a main pressure line 4 with a consumer, not shown connectable.
- The is particularly suitable Vane pump to supply power steering of a motor vehicle.
- a pump housing 5 of the vane pump is one Drive shaft, not shown, mounted with a rotor 6 located on it is connected.
- the Radial force of the rotor 6 is known and not shown controlled by suitable bearings.
- the rotor 6 has radially arranged slots 7, in which wings 8 are guided.
- the pump housing 1 there is also a circular one Cam ring 9 used, its eccentricity and thus the displacement volume of the vane pump is infinitely variable can be changed.
- a working chamber 10 Between the cylindrical peripheral surface of the rotor 6 and the bore of the cam ring 9 there is a working chamber 10 through the displacement of the cam ring 9 can be changed can.
- the working chamber 10 has a suction zone 11 and a pressure zone 12 and is through the wing 8 divided into feed chambers 13. From the pressure zone 12 becomes the pressure medium flow in the direction of the pump pressure side 3 in the main pressure channel 4 or one known, not shown, pressure collection chamber drained.
- the vane pump has a rear wing oil channel 14 on the Bores 19 and grooves not shown in the usual Way with the pump pressure side 3 or with the Pressure accumulator is connected.
- the exemplary embodiment is the rear wing oil channel 14 via the pressure line 20 to the main pressure line 4 connected.
- the eccentricity is two pressurized Actuators 15, 16 used.
- the actuators are an embodiment 15, 16 through the outer sides of the cam ring 9 formed or the outer sides are from behind Pressurized. The two outsides are against each other by a sealing element 17 sealed.
- the working chamber 10 of the cam ring adjacent first Actuating device 15 (or the space behind it), with the pressure of the rear wing oil passage 14 and the opposite arranged second adjusting device 16 applied with the pressure of the pump pressure side 3.
- the second actuating device 16 has a spring 18 on, the spring force of the pressure of the first actuator 15 counteracts.
- the first actuator 15 is with the rear wing oil duct 14 through a rear wing oil duct line 19 connected and thus with that in the rear wing oil duct 14 prevailing pressure (operating pressure + dynamic pressure).
- a secondary flow line leads from the first actuating device 15 20, in which an aperture 21 is arranged, to the second actuating device 16 or branches to the main pressure channel 4. Due to the aperture 21 arises a differential pressure between the first actuating device 15 and the second actuator 16.
- the pressure applied to the second adjusting device 16 largely corresponds in the present exemplary embodiment the pressure present in the main pressure channel 4.
- the pressure medium flows from the first actuating device 15 in the bypass line 20, the Aperture 21 pent up and then flows into the second actuating device 16 or the main pressure channel 4.
- the higher at the first actuating device 15 Pressure is essentially dependent on the speed or volume flow. At higher speeds, can of course also be influenced by the aperture 21, the differential pressure between the two actuators 15, 16 higher, so that from a certain Point overcome the spring force of the spring 18 and the Cam ring 9 is deflected accordingly. A provision with decreasing engine speeds the spring 18.
- the aperture 21 can be used as a measuring aperture, as a pressure-dependent valve or as an electrical one Proportional valve be formed.
- the selection can be based on the various known Properties.
- the rear wing oil channel 14 throttling points to increase the pressure at have increasing pump speed For this you can For example, four throttling points can be provided.
- the vane pump is operated in such a way that by a rotation of the rotor 6 (in the direction of the arrow) from an oil tank 22 through the suction port 2 Pressure medium in the suction zone 11 and thus in the delivery chamber 13 is funded. This pressure medium will then from the pressure zone 12 of the working chamber 10 drained into the main pressure line 4.
- the main pressure line 4 is with the rear wing oil channel 14 connected, which in turn by means of the rear wing oil duct 19 connected to the first actuating device 15 is. With increasing speed, this increases the pressure in the rear wing oil channel 14 so that the pressure medium is accumulated at the aperture 21. this leads to a differential pressure between the first actuating device 15 and the second actuating device 16.
- the first actuator 15 begins Curve ring 9 in the direction of the second adjusting device 16 deflect. This reduces the Available work space or the volume of the Delivery chamber 13, so that a lower pressure medium flow is promoted.
- the control of the control devices 15 and 16 takes place thus by the pressure medium flow, the rear wing oil area 14 and then the bypass line 20 flows through.
- the pressure medium flow in the main pressure line 4 remains unaffected, so that optimal efficiency and low power consumption the vane pump is possible.
- FIG. 2 The embodiment of the vane pump shown in Fig. 2 already differs from that in FIG. 1 Vane pump described only by a bypass control.
- a bypass control In the leading to the consumer Main pressure line 4 there is a control orifice 23, to control a bypass line 24 with corresponds to a bypass valve 25.
- the bypass line 24 should be an excess pressure medium flow Return to pump suction side 1. So is ensures that a constant, regulated pressure medium flow reached the consumer.
- the bypass valve 25 is designed such that the Bypass valve 25 the bypass line 24 only from a certain predetermined pressure opens.
- the pressure that the bypass valve is kept closed by a Valve spring 26 and a control line 27 constructed.
- the Control line 27 is with the pressure of the pressure medium charged to the consumer.
- the pressure of that Bypass valve 25 opens, is through the main pressure line 4 applied.
- bypass valve 25 is, as can be seen, for one overlaid bypass control trained.
- overlaid bypass control is from other areas well known and also results from the Drawing so that it is not discussed in detail becomes.
- superimposed Bypass control is referred to WO 99/19629 A1.
- the bypass line 24 forms at one end with the Suction port 2 a bypass injector, not shown.
- the bypass line 24 can, for example introduced as a blend in the suction port 2 become.
- the actuators 15 and 16 also with actuating pistons be provided.
- the first actuating device points 15 the larger actuating piston and the second actuating device 16 the smaller control piston.
- Control pistons to each other from 2 to 1.
- the smaller control piston is supported by a spring.
- the previous ones also apply analogously to the configurations the actuators 15 and 16 with actuating pistons.
- the larger control piston with the pressure of the rear wing oil duct 14.
- the actuating pistons are opposite, essentially vertical arranged to the conveying direction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
- Fig. 1
- ein hydraulisches Schaubild der erfindungsgemäßen Flügelzellenpumpe; und
- Fig. 2
- ein hydraulisches Schaubild der erfindungsgemäßen Flügelzellenpumpe gemäß Fig. 1 mit einer Bypassregelung.
- 1
- Pumpensaugseite
- 2
- Sauganschluß
- 3
- Pumpendruckseite
- 4
- Hauptdruckleitung
- 5
- Pumpengehäuse
- 6
- Rotor
- 7
- Schlitze
- 8
- Flügel
- 9
- Kurvenring
- 10
- Arbeitskammern
- 11
- Saugzone
- 12
- Druckzone
- 13
- Hauptdruckleitung
- 14
- Hinterflügelölkanal
- 15
- erste Stelleinrichtung
- 16
- zweite Stelleinrichtung
- 17
- Dichtelement
- 18
- Feder
- 19
- Hinterflügelölkanalleitung
- 20
- Nebenstromleitung
- 21
- Blende
- 22
- Ölbehälter
- 23
- Regelblende
- 24
- Bypassleitung
- 25
- Bypassventil
- 26
- Ventilfeder
- 27
- Regelleitung
Claims (14)
- Flügelzellenpumpe zum Erzeugen eines Druckmittelstromes zu einem Verbraucher, insbesondere einer Hilfskraftlenkung für Kraftfahrzeuge, mit folgenden Merkmalen:einer Pumpensaugseite, die von einem Sauganschluß mit einem Druckmittel versorgbar ist und einer Pumpendruckseite, die mittels einer Hauptdruckleitung mit dem Verbraucher verbindbar ist;einem Pumpengehäuse, in dem ein Kurvenring eingesetzt und eine Antriebswelle mit einem Rotor gelagert ist, wobei der Rotor Schlitze aufweist, in denen Flügel verschiebbar geführt sind;zwei druckbeaufschlagte Stelleinrichtungen zur Veränderung der Exzentrität des Kurvenrings;einem Hinterflügelölkanal, der über Bohrungen und Nuten mit der Pumpendruckseite verbunden ist; undeiner durch den Kurvenring und den Rotor gebildeten Arbeitskammer, die in axialer Richtung durch Steuerplatten begrenzt ist, wobei die Arbeitskammer eine Saugzone und eine Druckzone aufweist und durch die Flügel unterteilte Förderkammern gebildet sind,
eine Stelleinrichtung (15 bzw. 16) mit dem Druck des Hinterflügelölkanals (14) beaufschlagt ist. - Flügelzellenpumpe nach Anspruch 1,
dadurch gekennzeichnet, daß
die der Arbeitskammer (10) des Kurvenrings (9) benachbarte erste Stelleinrichtung (15) mit dem Druck des Hinterflügelölkanals (14) und die entgegengesetzt angeordnete zweite Stelleinrichtung (16) mit dem Druck der Pumpendruckseite (3) beaufschlagt ist. - Flügelzellenpumpe nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß
die zweite Stelleinrichtung (16) eine Feder (18) aufweist, deren Federkraft dem Druck der ersten Stelleinrichtung (15) entgegenwirkt. - Flügelzellenpumpe nach Anspruch 1, 2 oder 3,
dadurch gekennzeichnet, daß
die erste Stelleinrichtung (15) mittels einer Blende (21) mit der Pumpendruckseite (3) bzw. der Hauptdruckleitung (4) verbunden ist und die zweite Stelleinrichtung (16) an der von der ersten Stelleinrichtung (15) abgewandten Seite der Blende (21) angeschlossen ist. - Flügelzellenpumpe nach Anspruch 4,
dadurch gekennzeichnet, daß
sich das Druckmittel an der Blende (21) anstaut und der Kurvenring (9) durch den Differenzdruck verschiebbar ist. - Flügelzellenpumpe nach Anspruch 4 oder 5,
dadurch gekennzeichnet, daß
die Blende (21) als Meßblende oder als druckabhängiges Ventil oder als elektrisches Proportional-Ventil ausgebildet ist. - Flügelzellenpumpe nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß
der Hinterflügelölkanal (14) derart ausgebildet ist, daß sich durch die Bewegung der Flügel (8) in den Schlitzen (7) des Rotors (6) eine Hinterflügelpumpe bildet, die einen drehzahlabhängigen Staudruck im Hinterflügelölkanal (14) erzeugt. - Flügelzellenpumpe nach Anspruch 7,
dadurch gekennzeichnet, daß
der Hinterflügelölkanal (14) Drosselstellen zur Erhöhung des Drucks bei steigender Pumpendrehzahl aufweist. - Flügelzellenpumpe nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, daß
in der zum Verbraucher führenden Hauptdruckleitung (4) eine Regelblende (23) angeordnet ist, die zur Steuerung einer Bypassleitung (24) mit einem Bypassventil (25) korrespondiert. - Flügelzellenpumpe nach Anspruch 9,
dadurch gekennzeichnet, daß
durch das Bypassventil (25) und/oder das Verschieben des Kurvenrings (9) ein definierter Verlauf des Druckmittelstroms zu dem Verbraucher realisierbar ist. - Flügelzellenpumpe nach Anspruch 9 oder 10,
dadurch gekennzeichnet, daß
der Bypassdruckmittelstrom durch eine Verschneidung dem Druckmittelstrom zu der Saugzone (11) der Arbeitskammer (10) zuführbar ist. - Flügelzellenpumpe nach einem der Ansprüche 1 bis 11,
dadurch gekennzeichnet, daß
die Außenseiten des Kurvenrings (9) als Stelleinrichtungen (15,16) ausgebildet sind bzw. druckbeaufschlagt sind. - Flügelzellenpumpe nach einem der Ansprüche 1 bis 11,
dadurch gekennzeichnet, daß
die Stelleinrichtung (15,16) mit Stellkolben versehen sind. - Flügelzellenpumpe nach Anspruch 13,
dadurch gekennzeichnet, daß
der Stellkolben der ersten Stelleinrichtung (15) größer ist als der Stellkolben der zweiten Stelleinrichtung (16) und die Stellkolben vorzugsweise ein Flächenverhältnis von 2 zu 1 aufweisen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001160200 DE10160200A1 (de) | 2001-12-07 | 2001-12-07 | Flügelzellenpumpe |
DE10160200 | 2001-12-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1318305A2 true EP1318305A2 (de) | 2003-06-11 |
EP1318305A3 EP1318305A3 (de) | 2003-09-17 |
Family
ID=7708407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02026053A Withdrawn EP1318305A3 (de) | 2001-12-07 | 2002-11-22 | Flügelzellenpumpe |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1318305A3 (de) |
DE (1) | DE10160200A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202013000913U1 (de) * | 2013-01-30 | 2014-05-05 | Oerlikon Leybold Vacuum Gmbh | Vakuumpumpe insbesondere Wälzkolbenpumpe |
CN110985254A (zh) * | 2019-12-30 | 2020-04-10 | 江苏湖润泵业科技有限公司 | 高速共轨叶片泵 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999019629A1 (de) | 1997-10-15 | 1999-04-22 | Zf Friedrichshafen Ag | Verdrängerpumpe |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2806965A1 (de) * | 1978-02-18 | 1979-08-23 | Integral Hydraulik Co | Verstellbare hydraulische fluegelzellenpumpe |
JP2915626B2 (ja) * | 1990-07-25 | 1999-07-05 | 株式会社ユニシアジェックス | 可変容量型ベーンポンプ |
JP3739215B2 (ja) * | 1998-09-28 | 2006-01-25 | カヤバ工業株式会社 | 可変容量形ベーンポンプ |
DE19957886A1 (de) * | 1998-12-07 | 2000-07-20 | Bosch Braking Systems Co | Verstellpumpe |
-
2001
- 2001-12-07 DE DE2001160200 patent/DE10160200A1/de not_active Withdrawn
-
2002
- 2002-11-22 EP EP02026053A patent/EP1318305A3/de not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999019629A1 (de) | 1997-10-15 | 1999-04-22 | Zf Friedrichshafen Ag | Verdrängerpumpe |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202013000913U1 (de) * | 2013-01-30 | 2014-05-05 | Oerlikon Leybold Vacuum Gmbh | Vakuumpumpe insbesondere Wälzkolbenpumpe |
CN110985254A (zh) * | 2019-12-30 | 2020-04-10 | 江苏湖润泵业科技有限公司 | 高速共轨叶片泵 |
CN110985254B (zh) * | 2019-12-30 | 2021-08-13 | 江苏湖润泵业科技有限公司 | 一种高速共轨叶片泵 |
Also Published As
Publication number | Publication date |
---|---|
DE10160200A1 (de) | 2003-06-18 |
EP1318305A3 (de) | 2003-09-17 |
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