US20110099995A1 - Piston pump of a hydraulic vehicle brake system - Google Patents

Piston pump of a hydraulic vehicle brake system Download PDF

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Publication number
US20110099995A1
US20110099995A1 US13/000,690 US200913000690A US2011099995A1 US 20110099995 A1 US20110099995 A1 US 20110099995A1 US 200913000690 A US200913000690 A US 200913000690A US 2011099995 A1 US2011099995 A1 US 2011099995A1
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US
United States
Prior art keywords
piston pump
valve cap
conduit
conduit portions
annular shoulder
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.)
Abandoned
Application number
US13/000,690
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English (en)
Inventor
Wolfgang Schuller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHULLER, WOLFGANG
Publication of US20110099995A1 publication Critical patent/US20110099995A1/en
Abandoned legal-status Critical Current

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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
    • 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 is based on a piston pump, in particular for generating brake pressure in a hydraulic vehicle brake system, as generically defined by the characteristics of the preamble to claim 1 .
  • piston pumps Various designs of such piston pumps are known, for instance from German Patent Disclosure DE 101 12 618 A1. These known piston pumps have a pump housing with a receiving bore embodied on it. A bushing of the piston pump is inserted into this receiving bore. The bushing guides a piston, which can be driven into a reciprocating stroke motion by an eccentric element and which defines a pressure chamber of variable volume. A flow of pressure fluid through the piston pump is controlled by valves. The pressure fluid delivered flows to a pressure fluid conduit in the pump housing via an outflow conduit of the pump.
  • FIGS. 5 , 8 and 9 have piston pumps in which one of the valves, for controlling the flow of pressure fluid through the piston pump, is disposed separately from the piston in an installation chamber of a valve cap.
  • the valve cap closes off the receiving bore of the pump housing in pressure fluid-tight fashion from the environment.
  • a pressure fluid conduit of the pump housing in the versions of FIGS. 5 , 8 and 9 , discharges into the receiving bore on the far side of the inner end of the valve cap.
  • this produces a relatively great axial spacing of this pressure fluid conduit from an outside of the pump housing. This great spacing has an adverse effect on the structural volume of the pump housing.
  • a piston pump as defined by the characteristics of claim 1 has the advantage over the prior art that the spacing of a pressure fluid conduit toward the pump housing from an outside of this pump housing is reduced.
  • the pressure fluid conduit is located closer to one of the outsides of the pump housing and as a result makes better utilization of the structural space of the pump housing possible, for instance for the disposition of further pressure fluid conduits, not shown, or the like.
  • Overall, a more compactly designed pump housing can be attained as a result.
  • the structural volume, material requirements, and weight are a major competitive criterion.
  • first and second conduit portions of the outflow conduit can be advantageously disposed in view of maximizing the available cross-sectional.
  • the goal is the largest possible cross-sectional areas, so that no throttling action originates at the outflow conduit.
  • Advantages in this respect are also offered by the annular grooves claimed in claim 5 .
  • FIG. 1 for that purpose shows a piston pump, embodied according to the invention, in longitudinal section;
  • FIG. 2 shows a valve cap of the piston pump in plan view
  • FIG. 3 shows this valve cap again in a three-dimensional view, for the sake of clarity.
  • the piston pump 10 shown in FIG. 1 is disposed in a hydraulic unit of an electronically traction-controllable vehicle brake system and serves to regulate the brake pressure in at least one wheel brake, which is connected to this hydraulic unit via brake lines.
  • the hydraulic unit includes a pump housing 12 and an electronic control unit, not shown, secured to it.
  • the pump housing 12 is provided, among other things, with a receiving bore 14 with a piston pump built into it. This receiving bore 14 is reduced multiple times from the outside inward in its inside diameter and discharges toward an outside 16 of the pump housing 12 . Transversely extending pressure fluid conduits 18 , 20 discharge into the receiving bore 14 .
  • a first pressure fluid conduit 18 facing away from the outside 16 , forms an inlet and carries pressure fluid to the piston pump 10 , while a second pressure fluid conduit 20 , oriented toward the outside 16 of the hydraulic unit, functions as an outlet and carries pressure fluid, which is at elevated pressure, away from the piston pump 10 .
  • a bushing 22 of the piston pump 10 is inserted into the receiving bore 14 .
  • This bushing 22 is embodied in cup form and has a flat bushing bottom 24 , provided with a through bore, and a hollow-cylindrical bushing shaft 26 joined to the bushing bottom in one piece.
  • the bushing bottom 24 is oriented toward the outside 16 of the pump housing 12 .
  • a sleevelike filter element 28 is mounted on the bushing shaft 26 .
  • the filter element extends past the end of the bushing 22 , and the portion of the filter element 28 protruding past the bushing 22 is constricted in its outer and inner diameters and as a result partly covers an opening cross section of the bushing shaft 26 .
  • the filter element 28 simultaneously acts as an axial stop for a piston 30 received movably in the bushing.
  • the piston 30 is constructed of two piston parts 32 , 34 .
  • the first piston part 32 protrudes past the filter element 28 and forms the drive end of the piston 30 . It is embodied cylindrically, and on its end toward the bushing it is provided with a centrally disposed, blind-borelike recess.
  • the second, sleevelike piston part 34 protrudes in some portions into this recess.
  • An encompassing sealing and guide region 36 is integrally formed onto the outer circumference of the second piston part 34 and rests on the inside of the bushing 22 .
  • This sealing and guide region 36 guides the piston 30 and simultaneously seals off a pressure chamber 38 of the piston pump 10 that is located between the piston 30 and the bushing bottom 24 . By means of the pressure prevailing in the pressure chamber 38 , the sealing and guide region 36 is pressed to an increased extent against the inside of the bushing 22 .
  • a restoring spring 40 is accommodated in the pressure chamber 38 ; it is braced by one end on the bushing bottom 24 , and by the other end it urges the piston 30 in the direction of a drive element (not shown) that brings about the piston motion.
  • the end toward the piston of the restoring spring 40 is braced indirectly on the piston 30 , via a cup-shaped inlet valve housing 42 of an inlet valve 44 .
  • the inlet valve housing 42 is provided with perforations on its circumference, and in its interior it receives an inlet valve spring 46 .
  • This spring presses an inlet valve member 48 , which in the exemplary embodiment is embodied in the form of a valve plate, against an inlet valve seat 50 . The latter is embodied on the open end of the second piston part 34 .
  • a valve cap 52 seals off the receiving bore 14 from the surroundings. To that end, the valve cap 52 is pressed into the receiving bore 14 and is retained in it in form-locking fashion by means of a wedging of material of the pump housing.
  • the valve cap 52 on its inner face end, has an encompassing annular shoulder 54 and a collar 56 of narrow cross section protruding axially past the annular shoulder 54 .
  • the bushing 22 and the annular shoulder 54 are adapted in their diameters to one another, and as a result the collar 56 of the valve cap 52 surrounds the bushing 22 on the outer circumference. With its bushing bottom 24 , the bushing 22 is braced on the annular shoulder 54 of the valve cap 52 .
  • a shallow countersunk feature 58 embodied centrally on the valve cap 52 defines the inside diameter of the annular shoulder 54 and forms a hollow space between the bushing 22 and the valve cap 52 .
  • This shallow countersunk feature 58 merges with a blind-borelike central recess 60 in the valve cap 52 .
  • An outlet valve spring 62 is built into this central recess 60 and acts on an outlet valve body 64 .
  • a ball serves as the outlet valve body 64 and cooperates with an outlet valve seat 66 embodied on the bushing bottom 24 .
  • FIG. 2 in a plan view, shows the face end of the valve cap 52 located in the interior of the receiving bore.
  • the central recess 60 which as explained later receives the outlet valve spring 62 , is located in this center.
  • the central recess 60 merges with the shallow countersunk feature 58 .
  • the annular shoulder 54 adjoining it toward the outside is provided with a radially extending groove 70 , which hydraulically contacts a first recess 72 embodied on the inside of the collar 56 .
  • This first recess 72 extends parallel to the longitudinal axis of the valve cap 52 over the entire length of the collar 56 and forms a first conduit portion 74 of an outflow conduit of the piston pump 10 .
  • a plurality of such first recesses 72 are embodied along the inner circumference of the collar 56 .
  • annular groove 76 also present on the annular shoulder 54 establishes a hydraulic communication between the radially extending groove 70 and a second first recess 72 on the inside of the collar 56 .
  • this further recess 72 is located facing the first recess 72 .
  • second recesses 78 extending in the direction of the longitudinal axis of the valve cap 52 , are embodied on the outside and create second conduit portions 80 of the outflow conduit of the piston pump 10 .
  • the outer, second recesses 78 have a greater axial length than the inner, first recesses 72 .
  • the outer and inner recesses 72 , 78 are offset from one another in the circumferential direction of the collar 56 , so that the collar 56 , viewed from above, has an undulating contour. Such a contour can be made for instance by metal-cutting machining of the valve cap 52 or more economically by non-cutting shaping techniques.
  • the outer and inner recesses 72 , 78 discharge from the end of the valve cap 52 to the receiving bore 14 of the pump housing 12 and as a result communicate hydraulically with one another toward the outflow conduit of the piston pump.
  • a pressure fluid conduit 20 which carries the pressure fluid delivered by the piston pump 10 away.
  • This pressure fluid conduit 20 extends transversely to the receiving bore 14 and discharges into it.
  • the discharge point of the pressure fluid conduit 20 is disposed at the level of the valve cap 52 , because of the outer recesses 78 .
  • the axial spacing A of this outflow conduit 20 from the outside 16 of the pump housing 12 can thus be reduced. Because of this reduction in spacing, space is gained for disposing other necessary recesses in the interior of the pump housing 12 , as a result of which the pump housing 12 can be made overall more compactly.
  • FIG. 3 shows the valve cap 52 , already described above, again in perspective and therefore requires no additional explanation.
  • the reference numerals used were kept for FIG. 3 .
  • the piston 30 of the piston pump 10 is driven into a reciprocating stroke motion by a drive element, not shown, such as an eccentric element or a cam. Because of this reciprocating motion, the volume of the pressure chamber 38 defined by the bushing 22 and the piston 30 varies. If the piston 30 is moved by the drive element to the left in FIG. 1 counter to the force of the restoring spring 40 , the volume of the pressure chamber 38 decreases, and in the pressure fluid contained in it a pressure increase takes place. Together with the force of the inlet valve spring 46 , this pressure increase means that the inlet valve member 48 is pressed against the inlet valve seat 50 and seals it off.
  • a drive element not shown, such as an eccentric element or a cam.
  • the outlet valve member 64 lifts from the outlet valve seat 66 , and the outlet valve opens.
  • the pressure fluid of the pressure chamber 38 then flows into the interstice, formed by the shallow countersunk feature 58 in the valve cap 52 , between the bushing 22 and the valve cap 52 , and from there, via the radially extending groove 60 of the annular shoulder 54 , it reaches the first conduit portions 72 on the inside of the collar 56 on the valve cap 52 .
  • the pressure fluid flows into the receiving bore 14 of the conduit portion 10 and is diverted there by 180° and flows via the second conduit portions 78 of the outflow conduit, which are embodied on the outside of the valve cap 52 , to the pressure fluid conduit 20 in the pump housing 12 .
  • the 180° deflection of the pressure fluid flow in the receiving bores 14 has a damping effect on pressure pulsations that can occur because of the cyclical drive of a piston pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
US13/000,690 2008-06-27 2009-04-28 Piston pump of a hydraulic vehicle brake system Abandoned US20110099995A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1002008002740.5 2008-06-27
DE102008002740A DE102008002740A1 (de) 2008-06-27 2008-06-27 Kolbenpumpe
PCT/EP2009/055104 WO2009156215A1 (de) 2008-06-27 2009-04-28 Kolbenpumpe einer hydraulischen fahrzeugbremsanlage

Publications (1)

Publication Number Publication Date
US20110099995A1 true US20110099995A1 (en) 2011-05-05

Family

ID=40935776

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/000,690 Abandoned US20110099995A1 (en) 2008-06-27 2009-04-28 Piston pump of a hydraulic vehicle brake system

Country Status (8)

Country Link
US (1) US20110099995A1 (de)
EP (1) EP2294316B1 (de)
JP (1) JP5456033B2 (de)
KR (1) KR101556892B1 (de)
CN (1) CN102066751B (de)
AT (1) ATE528507T1 (de)
DE (1) DE102008002740A1 (de)
WO (1) WO2009156215A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130240773A1 (en) * 2010-08-19 2013-09-19 Robert Bosch Gmbh Valve of a piston pump with a closing body
US20140147314A1 (en) * 2011-07-27 2014-05-29 Robert Bosch Gmbh Piston pump for delivering fluids, and corresponding assembly process for a piston pump
US11111914B2 (en) * 2018-10-11 2021-09-07 Hyundai Mobis Co., Ltd. Piston pump for brake

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010040170A1 (de) 2010-09-02 2012-03-08 Robert Bosch Gmbh Kolbenpumpe zur Förderung von Fluiden und zugehörige Fahrzeugbremsanlage
DE102010040169A1 (de) 2010-09-02 2012-03-08 Robert Bosch Gmbh Vorrichtung zur Drosselung einer Fluidströmung und korrespondierende Kolbenpumpe zur Förderung von Fluiden
DE102010040157A1 (de) 2010-09-02 2012-03-08 Robert Bosch Gmbh Kolbenpumpe zur Förderung von Fluiden und zugehörige Fahrzeugbremsanlage
DE102011075518A1 (de) 2010-09-02 2012-04-26 Robert Bosch Gmbh Anordnung zur Drosselung einer Fluidströmung und korrespondierende Kolbenpumpe zur Förderung von Fluiden
DE102011004131A1 (de) * 2011-02-15 2012-08-16 Robert Bosch Gmbh Pumpe, insbesondere eines Fahrzeugbremssystems
WO2012152472A1 (de) 2011-05-09 2012-11-15 Robert Bosch Gmbh Anordnung zur drosselung einer fluidströmung und korrespondierende kolbenpumpe zur förderung von fluiden
DE102012213022A1 (de) * 2012-07-25 2014-01-30 Robert Bosch Gmbh Vorrichtung zur Drosselung einer Fluidströmung und korrespondierende Kolbenpumpe zur Förderung von Fluiden
DE102013226817A1 (de) * 2013-12-20 2015-06-25 Robert Bosch Gmbh Hydraulikaggregat
DE102015204317A1 (de) 2014-04-10 2015-10-15 Robert Bosch Gmbh Hydraulikaggregat
WO2015154901A1 (de) 2014-04-10 2015-10-15 Robert Bosch Gmbh Hydraulikaggregat
DE102014212292A1 (de) * 2014-06-26 2015-12-31 Robert Bosch Gmbh Auslassventil mit einem Aufnahmeelement
DE102014212496A1 (de) * 2014-06-27 2016-01-14 Robert Bosch Gmbh Auslassventilanordnung eines Pumpenelements einer Fahrzeugbremsanlage
DE102014225595A1 (de) 2014-12-11 2016-06-16 Robert Bosch Gmbh Druckerzeugungsvorrichtung für ein Bremssystem eines Kraftfahrzeuges, Hydraulikaggregat zum Zusammenwirken mit der Druckerzeugungsvorrichtung, Bremssystem und Verfahren zur Montage eines Bremssystems für ein Kraftfahrzeug
DE102014225590A1 (de) 2014-12-11 2016-06-16 Robert Bosch Gmbh Kolbenbaugruppe für eine Druckerzeugungsvorrichtung, Druckerzeugungsvorrichtung, Hydraulikaggregat zum Zusammenwirken mit der Druckerzeugungsvorrichtung, Bremssystem und Verfahren zur Montage der Kolbenbaugruppe für die Druckerzeugungsvorrichtung
US11203330B2 (en) 2015-10-13 2021-12-21 Robert Bosch Gmbh Hydraulic unit
CN109681421A (zh) * 2019-01-18 2019-04-26 万向钱潮股份有限公司 一种汽车esc用柱塞泵的上盖

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6334762B1 (en) * 1997-07-30 2002-01-01 Robert Bosch Gmbh Piston pump including an easily produced flow conduit
US20030047993A1 (en) * 2001-06-27 2003-03-13 Unisia Jecs Corporation Hydraulic pump unit for vehicle brake control system
US7278835B2 (en) * 2001-03-14 2007-10-09 Robert Bosch Gmbh Piston pump

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50207312D1 (de) * 2001-06-30 2006-08-03 Bosch Gmbh Robert Kolbenpumpe
DE10314979B3 (de) * 2003-04-02 2004-12-02 Robert Bosch Gmbh Kolbenpumpe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6334762B1 (en) * 1997-07-30 2002-01-01 Robert Bosch Gmbh Piston pump including an easily produced flow conduit
US7278835B2 (en) * 2001-03-14 2007-10-09 Robert Bosch Gmbh Piston pump
US20030047993A1 (en) * 2001-06-27 2003-03-13 Unisia Jecs Corporation Hydraulic pump unit for vehicle brake control system
US6837694B2 (en) * 2001-06-27 2005-01-04 Unisia Jecs Corporation Hydraulic pump unit with orifice plate for vehicle brake control system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130240773A1 (en) * 2010-08-19 2013-09-19 Robert Bosch Gmbh Valve of a piston pump with a closing body
US9982671B2 (en) * 2010-08-19 2018-05-29 Robert Bosch Gmbh Valve of a piston pump with a closing body
US20140147314A1 (en) * 2011-07-27 2014-05-29 Robert Bosch Gmbh Piston pump for delivering fluids, and corresponding assembly process for a piston pump
US9556859B2 (en) * 2011-07-27 2017-01-31 Robert Bosch Gmbh Piston pump for delivering fluids, and corresponding assembly process for a piston pump
US11111914B2 (en) * 2018-10-11 2021-09-07 Hyundai Mobis Co., Ltd. Piston pump for brake

Also Published As

Publication number Publication date
JP5456033B2 (ja) 2014-03-26
CN102066751B (zh) 2014-05-28
WO2009156215A1 (de) 2009-12-30
ATE528507T1 (de) 2011-10-15
JP2011525584A (ja) 2011-09-22
KR101556892B1 (ko) 2015-10-05
KR20110028299A (ko) 2011-03-17
CN102066751A (zh) 2011-05-18
DE102008002740A1 (de) 2009-12-31
EP2294316A1 (de) 2011-03-16
EP2294316B1 (de) 2011-10-12

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHULLER, WOLFGANG;REEL/FRAME:025747/0382

Effective date: 20100815

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION