WO2014090478A1 - Cylindre d'une pompe à piston d'un système de freinage de véhicule - Google Patents

Cylindre d'une pompe à piston d'un système de freinage de véhicule Download PDF

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Publication number
WO2014090478A1
WO2014090478A1 PCT/EP2013/072673 EP2013072673W WO2014090478A1 WO 2014090478 A1 WO2014090478 A1 WO 2014090478A1 EP 2013072673 W EP2013072673 W EP 2013072673W WO 2014090478 A1 WO2014090478 A1 WO 2014090478A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
closing body
return spring
piston pump
designed
Prior art date
Application number
PCT/EP2013/072673
Other languages
German (de)
English (en)
Inventor
Oliver Gaertner
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2014090478A1 publication Critical patent/WO2014090478A1/fr

Links

Classifications

    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0421—Cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4031—Pump units characterised by their construction or mounting
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0452—Distribution members, e.g. valves

Definitions

  • the invention relates to a cylinder of a piston pump for a vehicle brake system. Furthermore, the invention relates to the use of such a cylinder on a piston pump for a vehicle brake system.
  • Modern vehicle brake systems have a hydraulic unit, which is used in motor vehicles, such as passenger cars or trucks, to provide the brake system regulated braking pressures.
  • the hydraulic unit usually has a piston pump in the form of an axial piston pump, in which a piston in a cup-shaped cylinder is displaceable.
  • the cylinder is located in a pump housing, which is closed there with a pump cover or housing cover.
  • the piston is driven at one of its ends by an eccentric and protrudes with its other end in the cup-shaped cylinder.
  • the piston delimits a pressure chamber whose volume is reduced or increased during retraction and extension of the piston.
  • fluid in particular brake fluid
  • an outlet valve is arranged on the cylinder, which is formed with a valve seat, a closing body can be applied thereto and a return spring.
  • the return spring is supported on the pump cover.
  • a piston pump is known for example from DE 10 2005 017 131 A1.
  • a cylinder of a piston pump for a vehicle brake system which extends along a cylinder axis and with a Cylinder bottom is designed, on which a valve seat of an exhaust valve is arranged, which further comprises a closing body and a return spring.
  • a closing body guide is also provided for guiding the closing body in the axial direction of the cylinder, which is formed integrally with the cylinder bottom. Since the closing body guide according to the invention is designed in one piece or in one piece with the associated component forming the valve seat, a coaxial error between the axis of the valve seat and the axis of the closing body is avoided, which can result from piston pumps in conventional cylinders.
  • the closure member according to the invention can be performed very accurately position with the formation of a closure body guide during its closing and opening movement and find very well in or on the valve seat. This leads to a very good NVH behavior of the exhaust valve.
  • NVH stands for "Noise, Vibration, Harshness” and is synonymous with unpleasant noises or vibrations in the associated motor vehicle
  • the exhaust valve according to the invention has a particularly good pressure build-up dynamics and is comparatively cost-effective because the closing body guide according to the invention is largely cost-neutral on the cylinder bottom can be integrated.
  • the closing body guide according to the invention is preferably configured projecting from the cylinder base.
  • the cylinder bottom can thus be made comparatively thin and lightweight.
  • the closing body guide is further designed with a hollow cylindrical sleeve extending in the axial direction.
  • the sleeve forms a largely Vollumflindliche leadership for doing particularly preferred spherical closure body.
  • a cylinder of a piston pump for a vehicle brake system in particular the above-mentioned inventive type, created, which also extends along a cylinder axis and is designed with a cylinder bottom, on which a valve seat of an exhaust valve is arranged, which further comprises a closing body and comprises a return spring.
  • a return spring support for supporting the return spring in the axial direction of the cylinder is provided, which is formed integrally with the cylinder bottom.
  • the return spring support is also preferably designed with an axially extending hollow cylindrical sleeve.
  • the sleeve is preferably formed with at least one radially directed outflow opening.
  • the inventive sleeve on the cylinder bottom of a piston pump is preferably provided with a radially extending closure lid.
  • the closure lid serves as a support in front of the return spring in the axial direction.
  • a largely closed space can be formed in the flow direction of the fluid emerging through the opening of the valve seat.
  • This space can be used as a damper chamber for the movement of the closing body.
  • the closure lid can be designed with appropriate flexibility or flexibility. Thus, it can be deflected as a damper in the axial direction at least slightly out of its otherwise largely flat extent.
  • the restoring spring support can be designed with at least two latching hooks extending in the axial direction.
  • exactly three such latching hooks are provided for a static determination of the arrangement of return spring and closing body.
  • the components closing body and return spring can be particularly easily mounted by snapping in the axial direction.
  • the closing body and return spring components are captively secured to the cylinder bottom.
  • further assembly steps can be additionally simplified.
  • a precise guidance of the closing body is ensured at the valve seat during operation of the associated piston pump.
  • the invention is further directed to a use of such a cylinder on a piston pump of a vehicle brake system.
  • FIG. 1 shows a longitudinal section of a piston pump for a vehicle brake system according to the prior art with an associated cylinder
  • FIG. 2 is an enlarged view of the detail II of FIG. 1,
  • FIG. 3 shows the view of FIG. 2 of a first embodiment of a cylinder according to the invention with associated exhaust valve and
  • Fig. 4 is a longitudinal section of a second embodiment of a cylinder according to the invention.
  • a piston pump 10 which comprises a cup-shaped cylinder 12, the cylinder wall 14 extends along a cylinder axis 16.
  • a filter sleeve 18 At the open end of the cylinder wall 14 is a filter sleeve 18 and to this then a low-pressure sealing ring 20 and a support ring 22nd
  • a piston rod 24 of a piston is guided, to which further belongs to the piston rod 24 in the axial direction subsequent valve seat member 26.
  • three inlet openings 28 are formed for supplying brake fluid radially inwardly to a valve seat 30 of an inlet valve 32.
  • the valve cage 34 is integrally formed with a high-pressure sealing ring 40 which seals on the inside of the cylinder wall 14 and thus delimits in the cylinder 12 a cylinder chamber 42 as a pressure chamber for the fluid to be delivered.
  • the circular valve seat opening 50 is closed with a spherical closing body 52.
  • the closing body 52 is thereby urged by means of a helical return spring 54 against the valve seat 46, which is supported on a pump cover 56.
  • Channels for discharging brake fluid from the cylinder chamber 42 under pressure are formed in the pump cover 56 as an outlet 58.
  • the pressure buildup takes place by means of the piston formed from the piston rod 24, the valve seat part 26 and the high-pressure sealing ring 40, wherein this piston movement is counteracted by means of a cylinder space 42 located in the return spring 60 for returning the piston.
  • FIGS. 3 and 4 Illustrated in FIGS. 3 and 4 are exemplary embodiments of a hollow-cylindrical sleeve 66 which protrudes in the direction of the cylinder axis 16 on the cylinder base 44 of the cylinder 12 at its end face 68 facing away from the cylinder space 42.
  • the sleeve 66 is designed as a hollow cylinder and acts on its substantially circular cylindrical inner side 70 as a closing body guide.
  • This inside 70 and inner wall surface of the sleeve 66 may be designed as shown completely smooth or alternatively in particular longitudinal guide webs, on which the spherical closure member 52 can slide along.
  • the sleeve 66 of FIG. 3 has at the transition from the cylinder bottom 44 outside a draft 22, by means of which the sleeve 66 is additionally supported.
  • the illustrated in Fig. 4 sleeve 66 is from the end face 68, however, stepped or at right angles.
  • end portion 74 is formed as a return spring, by means of which the return spring 54 is precisely coaxial with the valve seat 46 is placed and supported.
  • the sleeve 66 is closed by means of a radially extending closure lid 77, which is pressed into the sleeve 66 at the end region 74 therein and likewise forms a component of the restoring spring support.
  • an outflow opening 78 is provided immediately adjacent to the cylinder bottom 44. This discharge opening 78 passes through the wall of the sleeve 66 and according to FIG. 3 in particular also the local draft 72 completely in the radial direction.
  • the restoring spring support is designed with three locking hooks extending in the axial direction, which are distributed around the circumference of the valve seat opening 50 at equal intervals of 120 ° around it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

Cylindre (12) d'une pompe à piston (10) d'un système de freinage de véhicule, s'étendant le long d'un axe de cylindre (16) et comportant un fond de cylindre (44) dans lequel est disposé un siège de soupape (46) d'une soupape d'échappement (48). La soupape d'échappement (48) comporte en outre un élément de fermeture (52) et un ressort de rappel (54). Selon l'invention, un guide d'élément de fermeture (70) sert à guider l'élément de fermeture (52) dans la direction axiale du cylindre (12), ce guide formant un seul tenant avec le fond de cylindre (44).
PCT/EP2013/072673 2012-12-13 2013-10-30 Cylindre d'une pompe à piston d'un système de freinage de véhicule WO2014090478A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012223119.6A DE102012223119A1 (de) 2012-12-13 2012-12-13 Zylinder einer Kolbenpumpe einer Fahrzeugbremsanlage
DE102012223119.6 2012-12-13

Publications (1)

Publication Number Publication Date
WO2014090478A1 true WO2014090478A1 (fr) 2014-06-19

Family

ID=49578266

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/072673 WO2014090478A1 (fr) 2012-12-13 2013-10-30 Cylindre d'une pompe à piston d'un système de freinage de véhicule

Country Status (2)

Country Link
DE (1) DE102012223119A1 (fr)
WO (1) WO2014090478A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014222480A1 (de) 2014-11-04 2016-05-04 Robert Bosch Gmbh Kolbenbaugruppe, insbesondere für eine Kolbenpumpe eines Hydraulikaggregats eines Kraftfahrzeugs bzw. Kolbenpumpe
DE102017216900A1 (de) * 2017-09-25 2019-03-28 Robert Bosch Gmbh Druckmittelsteuerventil, insbesondere zur Steuerung einer Durchströmungsrichtung in einem Druckmittelkreis und Kolbenpumpe, insbesondere zur Förderung eines Druckmittels in einer elektronisch schlupfregelbaren Fahrzeugbremsanlage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0928894A2 (fr) * 1998-01-09 1999-07-14 Robert Bosch Gmbh Piston en matériau plastique d' une pompe à piston pour un système de freinage hydraulique dans un véhicule
DE102005017131A1 (de) 2005-04-14 2006-10-19 Robert Bosch Gmbh Kolbenpumpe
DE102007018235A1 (de) * 2007-04-18 2008-10-23 Robert Bosch Gmbh Pumpenvorrichtung zur Erzeugung hoher Drücke
DE102008001856A1 (de) * 2008-05-19 2009-11-26 Robert Bosch Gmbh Steckpumpe
DE102008040090A1 (de) * 2008-07-02 2010-01-07 Robert Bosch Gmbh Hochdruckpumpe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0928894A2 (fr) * 1998-01-09 1999-07-14 Robert Bosch Gmbh Piston en matériau plastique d' une pompe à piston pour un système de freinage hydraulique dans un véhicule
DE102005017131A1 (de) 2005-04-14 2006-10-19 Robert Bosch Gmbh Kolbenpumpe
DE102007018235A1 (de) * 2007-04-18 2008-10-23 Robert Bosch Gmbh Pumpenvorrichtung zur Erzeugung hoher Drücke
DE102008001856A1 (de) * 2008-05-19 2009-11-26 Robert Bosch Gmbh Steckpumpe
DE102008040090A1 (de) * 2008-07-02 2010-01-07 Robert Bosch Gmbh Hochdruckpumpe

Also Published As

Publication number Publication date
DE102012223119A1 (de) 2014-06-18

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