EP2049795A1 - Piston de pompe à piston pour systèmes de freinage de véhicules - Google Patents

Piston de pompe à piston pour systèmes de freinage de véhicules

Info

Publication number
EP2049795A1
EP2049795A1 EP07787021A EP07787021A EP2049795A1 EP 2049795 A1 EP2049795 A1 EP 2049795A1 EP 07787021 A EP07787021 A EP 07787021A EP 07787021 A EP07787021 A EP 07787021A EP 2049795 A1 EP2049795 A1 EP 2049795A1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
cross
brake system
vehicle brake
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Withdrawn
Application number
EP07787021A
Other languages
German (de)
English (en)
Inventor
Reiner Fellmeth
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
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 EP2049795A1 publication Critical patent/EP2049795A1/fr
Withdrawn legal-status Critical Current

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
    • F04B5/00—Machines or pumps with differential-surface pistons
    • 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
    • F04B1/0408—Pistons
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • 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

Definitions

  • the invention relates to a piston of a vehicle brake system piston pump which is displaceably mounted in a cylinder of the vehicle brake system piston pump in a cylinder opening.
  • Vehicle brake piston pumps of the type mentioned above are installed in motor vehicles in the associated brake systems, there to promote brake fluid to wheel brake cylinder or to suck them off.
  • the piston pumps are usually provided with two pistons, which can be reciprocated by means of an eccentric drive disposed therebetween in a respective cylinder opening.
  • the pistons each have a Wirk Ltd. Cross-sectional area, which is directed to a formed in the cylinder and the cylinder opening forming pressure chamber. When reciprocating the piston this promotes brake fluid out of this pressure chamber.
  • the piston pump has a predefined effective or cross-sectional area on each of its pistons, so that a predefined delivery rate is generated for each stroke of the piston.
  • the object is erf ⁇ ndungsmul with a piston of a vehicle brake system piston pump according to claim 1. Furthermore, the object is achieved with affybremsanlagen- piston pump according to claim 3 and a group of vehicle brake system piston pumps according to claim 5.
  • a piston of aggybremsanlagen- piston pump is created, which is slidably mounted in a cylinder of the vehicle brake system piston pump in a cylinder opening.
  • the piston has a first and a second end region, which are designed with different sized cross-sectional area. Both end regions are further adapted to produce a tight coupling with one of two cylinders, the cylinder openings of which have differently sized cross-sectional areas adapted to the size of the cross-sectional areas of the piston.
  • the inventive piston is designed such that it can not only be used with one end region in the cylinder opening of a cylinder, but that its two end regions can be inserted into correspondingly designed cylinder openings of two different cylinders.
  • the end portions of the piston according to the invention are designed with different sized cross-sectional areas, so that the piston depending on the installation situation on a cylinder with a correspondingly small designed Zylinderöffhung has a different capacity than in a mounting situation on a
  • this sealing element must be designed differently sized, usually with different large diameter, depending on the desired diameter of the piston or the cylinder opening.
  • the cylinder of the Anlagenbremsanlagen- piston pump according to the invention is advantageously designed according to each with a Zylinderöffhung whose cross-sectional area is adapted to one of the two cross-sectional areas of the end portions of the piston.
  • Said sealing elements are preferably adjusted in size according to the size of the cross-sectional area of the Zylinderöffhung and the associated end portion of the piston.
  • a group of vehicle brake system piston pumps each having a cylinder and a respective piston, is also provided according to the invention, which is displaceably mounted in a cylinder opening of the associated cylinder.
  • Each piston has a first and a second end portion, which are designed with different sized cross-sectional areas.
  • both end regions are adapted to produce a fluid-tight coupling with an associated cylinder.
  • At least two cylinders are designed with Zylinderöffhungen of different sized cross-sectional area, wherein the size of the cross-sectional area of the cylinder opening is ever adapted to one of the different sized cross-sectional areas of the end portions of the piston.
  • Fig. 1 is a longitudinal section of affybremsanlagen- piston pump according to the prior art.
  • Fig. 2 shows the detail II of Fig. 1 in a first vehicle brake system according to the invention piston pump and
  • Fig. 3 shows the detail II of Fig. 1 in a second vehicle brake system according to the invention piston pump. - A -
  • a vehicle brake system piston pump 10 which comprises a pump housing 12 having a stepped bore 14 and an eccentric 16 formed therein.
  • a cylinder 18 is received with a Zylinderöffhung 28, in which a piston 20 is slidably mounted.
  • One of the end faces 22 of the piston 20 abuts on the eccentric 16, so that the piston 20 is displaced in the Zylinderöffhung 28 when turning the eccentric 16.
  • the piston 20 is biased by a coil spring 24 against a bottom 26 of the Zylinderöffhung 28 resiliently. The coil spring 24 is thus in the cylinder chamber 28, to which the piston 20 faces with its second end face 30.
  • an inlet valve 32 is further formed to the brake fluid can flow through an inlet conduit 34.
  • an outlet valve 36 is formed through which can flow that brake fluid, which was conveyed from the piston 20 from the pressure chamber 28 out. The required brake fluid enters an outlet line 38.
  • the thus formed and mounted piston 20 and the cylinder 18 each have a single cross-sectional area 40 in the region of the cylinder opening 28, which defines the delivery rate when the piston 20 is moved.
  • FIG. 2 the detail II of FIG. 1 is simplified in a vehicle brake system piston pump 42 according to the invention, which with respect to the component 12, 14, 16, 24, 32, 34, 36 and 38 as the vehicle brake system piston pump 10 Fig. 1 is designed.
  • the vehicle brake system piston pump 42 is designed differently.
  • the piston 46 is stepped, designed with two different sized cross-sectional areas 48 and 50, which each form an end portion of the piston 46, are circular and correspondingly have different diameters.
  • a receptacle 52 or 54 is formed, which serves for receiving a sealing element.
  • a sealing element 56 in the form of a high-pressure seal in annular form is provided, which is inserted into the receptacle 52.
  • the receptacle 54 on the piston 46 is empty.
  • the sealing element 56 is in this way designed a seal against a diameter comparatively small Zylinderöffhung 58, which is formed in the cylinder 44.
  • Fig. 3 is also the detail II, this time illustrated in another inventive vehicle brake system piston pump 60, which in turn with respect to the components 12, 14, 16, 24, 32, 34, 36 and 38 as the vehicle brake system piston pump 10 according to Fig. 1 is designed.
  • piston 46 in this embodiment is the same as the piston 46 in the embodiment of FIG. 2nd
  • the piston 46 is now not inserted with the end portion of the cross-sectional area 48, but with the end portion of the cross-sectional area 50 in a cylinder opening 62 of a cylinder 64.
  • the cylinder opening 62 is correspondingly made larger in diameter, so that a correspondingly larger pressure chamber with respect to the cross-sectional area is created.
  • a correspondingly large sealing element 66 is inserted on the receptacle 54 of the piston 46, while the receptacle 52 is left empty.

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

L'invention concerne un piston (46) de pompe à piston pour système de freinage de véhicules (42, 60), qui est logé coulissant dans une ouverture de cylindre (44, 64) de la pompe à piston pour systèmes de freinage de véhicules (42, 60). Selon l'invention, ledit piston (46) se caractérise en ce qu'il présente une première et une seconde zone terminale, conçues avec une surface de section transversale (48, 50) de dimensions différentes. Les deux zones terminales sont adaptées de manière à former un accouplement étanche, conjointement avec un des cylindres (44, 64), dont les ouvertures (58, 62) présentent des surfaces de section transversale de différentes dimensions, adaptées aux surfaces de section transversale (48, 50) du piston (46).
EP07787021A 2006-08-01 2007-07-03 Piston de pompe à piston pour systèmes de freinage de véhicules Withdrawn EP2049795A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610035705 DE102006035705A1 (de) 2006-08-01 2006-08-01 Kolben einer Fahrzeugbremsanlagen-Kolbenpumpe
PCT/EP2007/056698 WO2008015068A1 (fr) 2006-08-01 2007-07-03 Piston de pompe à piston pour systèmes de freinage de véhicules

Publications (1)

Publication Number Publication Date
EP2049795A1 true EP2049795A1 (fr) 2009-04-22

Family

ID=38458284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07787021A Withdrawn EP2049795A1 (fr) 2006-08-01 2007-07-03 Piston de pompe à piston pour systèmes de freinage de véhicules

Country Status (4)

Country Link
EP (1) EP2049795A1 (fr)
CN (1) CN101495749A (fr)
DE (1) DE102006035705A1 (fr)
WO (1) WO2008015068A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014226316A1 (de) * 2014-12-17 2016-06-23 Robert Bosch Gmbh Kolben-Kraftstoffpumpe für eine Brennkraftmaschine
JP6406195B2 (ja) * 2015-09-18 2018-10-17 株式会社デンソー ポンプ
DE102016224835A1 (de) * 2016-12-13 2018-06-14 Robert Bosch Gmbh Pumpe, insbesondere Hochdruckpumpe eines Kraftstoffeinspritzsystems
KR20230092906A (ko) * 2020-10-21 2023-06-26 프로빈셜 헬스 서비시즈 오쏘리티 신규한 cxcr4 표적화 화합물

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4435133A (en) * 1977-10-17 1984-03-06 Pneumo Corporation Free piston engine pump with energy rate smoothing
AT367916B (de) * 1980-07-14 1982-08-10 Arcana Chem Pharm Produktpumpe fuer eine dosiervorrichtung
DE4439545A1 (de) * 1994-11-05 1996-05-09 Gerhard Hestermann Vorrichtung zur teilweisen Trennung flüssiger Lösungen nach dem Prinzip der Querfiltration
WO1999044873A1 (fr) * 1998-03-05 1999-09-10 Kelsey-Hayes Company Unite de commande hydraulique pour systeme de freinage antiblocage muni d'une pompe assurant la baisse de pression
DE102004061810A1 (de) * 2004-12-22 2006-07-06 Robert Bosch Gmbh Kolbenpumpe mit wenigstens einem Stufenkolbenelement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008015068A1 *

Also Published As

Publication number Publication date
DE102006035705A1 (de) 2008-02-07
WO2008015068A1 (fr) 2008-02-07
CN101495749A (zh) 2009-07-29

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