WO2007057255A1 - Clapet antiretour et injecteur dote d'un transducteur hydraulique - Google Patents

Clapet antiretour et injecteur dote d'un transducteur hydraulique Download PDF

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Publication number
WO2007057255A1
WO2007057255A1 PCT/EP2006/067175 EP2006067175W WO2007057255A1 WO 2007057255 A1 WO2007057255 A1 WO 2007057255A1 EP 2006067175 W EP2006067175 W EP 2006067175W WO 2007057255 A1 WO2007057255 A1 WO 2007057255A1
Authority
WO
WIPO (PCT)
Prior art keywords
check valve
bore
valve according
sleeve
stroke stop
Prior art date
Application number
PCT/EP2006/067175
Other languages
German (de)
English (en)
Inventor
Juergen Frasch
Christoph Butscher
Stephan Wehr
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 WO2007057255A1 publication Critical patent/WO2007057255A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
    • F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/04—Check valves with guided rigid valve members shaped as balls

Definitions

  • the invention relates to a check valve with a valve member, with a valve seat and with a
  • Valve spring wherein the valve spring at one end bears against the valve member and the other end against an abutment.
  • check valves are suitable for many applications, however, there are in particular in use in injectors with hydraulic pressure booster, as in modern fuel injection systems for
  • the object of the invention is to provide non-return valves which can be used even at extremely high pressures and whose service life is high even at high switching frequencies.
  • valve member is formed as a sleeve, that the sleeve is guided axially displaceably in a bore, and that the sleeve has a cooperating with the valve seat tip.
  • Valve member axially slidably guided in a bore, so that the valve member can not escape laterally and always impinges on the same position of the valve seat on this, when it moves into the closed position. This achieves a very good seal and at the same time reduces wear.
  • valve member on the valve seat the valve member is centered by the valve seat again. This leads to a relative movement between the valve member and the valve seat. This relative movement causes wear and significantly shortens the life of the valve seat and valve member.
  • a dome of the valve member is formed dome-shaped and / or conical. Due to the dome-shaped design of the dome, the advantages of a spherical valve member can also be used in the check valve according to the invention.
  • a blind hole is provided, which serves to receive the valve spring.
  • the valve spring is fixed in the radial direction and can not move laterally. This measure significantly increases the service life of the valve spring in the non-return valve according to the invention.
  • blind hole receives one end of the valve spring in the radial direction without play. This can not be
  • At least one connecting bore arranged in the direction of flow downstream of the crest is provided which connects a reduced-diameter portion of the sleeve to the blind hole.
  • the sleeve has at least one longitudinal groove which extends over the entire length of the sleeve.
  • fuel can flow past the sleeve past the check valve according to the invention when the non-return valve is open.
  • an abutment of the valve spring has a recess, and that the recess receives one end of the valve spring in the radial direction without play.
  • the above-mentioned advantages of a play-free recording of the valve spring can also be realized on the abutment.
  • the abutment is fixed in the bore in the axial direction.
  • This can for example take place in that a circumferential groove is formed in the bore, and in that a snap ring or a snap ring is provided in the circumferential groove, which fixes the abutment in the axial direction.
  • the object mentioned is inventively solved even with a check valve with a spherical valve member and with a stroke stop that the stroke stop is designed as a sleeve, that the stroke stop has a long bore, and that a diameter of the longitudinal bore of the stroke stop is smaller than a diameter of the valve member is.
  • valve member in the open state of the elongated bore of the stroke stop which can be chamfered of course, is centered
  • the valve member of the inventive non-return valve meets exactly centered on the valve seat when the check valve closes again, so that a significant wear between the valve seat and valve member is not detectable.
  • a valve spring which significantly reduces the manufacturing cost and space requirements of the check valve according to the invention. Due to the reduced masses, this check valve responds very quickly.
  • the stroke stop is advantageously fixed in the bore in the axial direction.
  • a connecting bore is provided on the stroke stop, which connects at least one diameter-reduced portion of the stroke stop to the longitudinal bore.
  • longitudinal grooves are provided which extend over the entire length of the sleeve.
  • the check valve according to the invention can be used particularly advantageously in an injector with a hydraulic pressure booster for an internal combustion engine.
  • Show it Figure 1 is a longitudinal section through a first
  • FIG. 3 shows a third exemplary embodiment of a check valve according to the invention
  • Figure 4 shows a fourth embodiment of a check valve according to the invention.
  • Figure 5 shows an injector according to the invention with hydraulic pressure booster and check valve according to the invention.
  • a component which can be, for example, a pressure booster piston of a hydraulic pressure booster, is designated by the reference numeral 1.
  • a stepped bore 3 is provided. Between two sections of the bore 3 with different diameters, a valve seat 5 is formed.
  • a valve member in the form of a cylindrical sleeve 7 is guided axially displaceable.
  • a dome 9 is formed, whose outer contour is dome-shaped.
  • the dome-shaped outer contour of the dome 9 cooperates with the valve seat 5 in the component 1 and closes the check valve as soon as the sleeve 7 rests on the valve seat 5.
  • a blind hole 11 is provided, which is designed as a stepped bore.
  • a valve spring 15 is supported at one shoulder 13 of the blind bore 11 at one end. Where the valve spring 15 is supported on the shoulder 13, the diameter of the blind hole 11 is dimensioned so that the valve spring 15 is fixed without play in the blind hole 11. As a result, relative movements between the valve spring 15 and the sleeve 7 are prevented.
  • the blind bore 11 has a slightly larger diameter than the valve spring 15, so that the valve spring 15 does not bear against the wall of the blind bore 11 in the opened state of the check valve.
  • a connecting bore 17 is shown, which connects a diameter-reduced region 19, which lies downstream of the tip 9 in the flow direction, with the blind hole 11. If necessary, a plurality of connecting bores 17 can be provided over the circumference of the sleeve 7.
  • Longitudinal grooves 21 are uniformly distributed over the circumference provided in the sleeve 7.
  • valve spring 15 The right in Figure 1 end of the valve spring 15 is supported in an abutment 23.
  • a recess 25 is provided, whose diameter is matched to the diameter of the valve spring 15, that this end of the valve spring 15 is fixed without play in the radial direction.
  • a bore 27 is provided through which the fuel can flow when the check valve is open.
  • the diameter of the bore 27 may, if desired, be chosen so that the movements of the valve member 7 are damped.
  • the abutment 23 is fixed in the first embodiment shown in Figure 1 by means of a snap ring 29 which is inserted into a circumferential groove 31 in the axial direction in the bore 3. If, as shown in Figure 1, the contact surface between the abutment 23 and the snap ring 29 is frustoconical, the force exerted by the valve spring 15 on the abutment 23 force causes the snap ring 29 is pressed into the circumferential groove 31 and thus the snap ring 29 is secured in the circumferential groove 31.
  • the abutment 23 is also designed as a stroke stop for the sleeve 7 at the same time.
  • the maximum possible stroke is shown in Figure 1 by the reference numeral 33. As soon as the tip 9 facing away from the end of the sleeve 7 comes to rest on the abutment 23, the maximum stroke is reached. As a result, the mechanical stress of the valve spring 15 is limited.
  • FIG. 2 shows a second exemplary embodiment of a check valve according to the invention.
  • the same components are provided with the same reference numerals, and the same applies with regard to FIG. 1.
  • Embodiment and the second embodiment is that in the embodiment of Figure 2, the abutment 23 is fixed by means of a pin 35 in the bore 3 in the axial direction.
  • a longitudinal groove 37 is provided instead of the bore 27.
  • the abutment 23 is fixed in the axial direction in the bore 3 in that a welding ring 39 against which the
  • Abutment 23 is supported welded to the housing 1.
  • the weld is provided in Figure 3 by the reference numeral 41.
  • FIG. 4 shows a further exemplary embodiment of a check valve according to the invention. Again, it is true that the same components provided with the same reference numerals and reference is made to the above.
  • the valve member is formed as a ball 43.
  • a valve spring is not provided and not required.
  • Stroke stop 45 is fixed with a longitudinal bore 47 in the bore 3 in the axial direction by means of a snap ring 31.
  • the diameter of the longitudinal bore 47 is smaller than the diameter of the spherical valve member 43.
  • the maximum stroke is also indicated in this embodiment by the reference numeral 33.
  • the stroke stop 45 has a diameter-reduced region 51. From the diameter-reduced portions 51 go from a plurality of connecting holes 53, which open into the longitudinal bore 47. As a result, the fuel can flow past the valve member 43, which in the open state (not shown) bears against the stroke stop 45.
  • FIG. 5 shows an application example of the check valve according to the invention is shown schematically.
  • An injector is designated in its entirety by the reference numeral 55.
  • the injector 55 is supplied via a high-pressure line (without reference numeral) from a common rail 57 with high-pressure fuel.
  • a hydraulic pressure booster 59th intended.
  • the hydraulic pressure booster 59 comprises a converter piston 61, which separates a low-pressure space 63 from a high-pressure space 65.
  • a stylized return check valve 67 is arranged, which prevents fuel from the high-pressure chamber 65 can flow into the low-pressure chamber 63.
  • This non-return valve 67 is preferably a non-return valve according to the exemplary embodiments according to FIGS. 1 to 4.
  • the high-pressure chamber 65 is hydraulically connected to a pressure chamber 69 in which a nozzle needle 71 is arranged. Via a first solenoid valve 73, which is designed as a 3/2-way valve and controls the hydraulic pressure booster 59, and a second solenoid valve 75, which controls the pressure in the pressure chamber 69, the nozzle needle 71 is opened and closed.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Abstract

L'invention propose un clapet antiretour dont la durée de vie et la fiabilité de fonctionnement sont nettement améliorées par rapport aux clapets antiretour habituels dont l'organe de soupape présente la forme d'une bille. L'organe de soupape est configuré comme douille (7) guidée axialement dans un alésage (3). Dans une variante de réalisation (figure 4), l'organe de soupape (43) a une forme sphérique et la butée (45) de fin de course a la forme d'une douille.
PCT/EP2006/067175 2005-11-21 2006-10-09 Clapet antiretour et injecteur dote d'un transducteur hydraulique WO2007057255A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510055360 DE102005055360A1 (de) 2005-11-21 2005-11-21 Rückschlagventil und Injektor mit hydraulischem Übersetzer
DE102005055360.5 2005-11-21

Publications (1)

Publication Number Publication Date
WO2007057255A1 true WO2007057255A1 (fr) 2007-05-24

Family

ID=37603461

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/067175 WO2007057255A1 (fr) 2005-11-21 2006-10-09 Clapet antiretour et injecteur dote d'un transducteur hydraulique

Country Status (2)

Country Link
DE (1) DE102005055360A1 (fr)
WO (1) WO2007057255A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008087051A1 (fr) * 2007-01-17 2008-07-24 Robert Bosch Gmbh Clapet anti-retour et injecteur muni d'un convertisseur hydraulique et d'un clapet anti-retour
US20230008417A1 (en) * 2021-07-09 2023-01-12 Goodrich Corporation Valve

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008001572A1 (de) 2008-05-06 2009-11-12 Robert Bosch Gmbh Federhaltehülse
DE102008047386A1 (de) * 2008-09-16 2010-04-15 Continental Mechanical Components Germany Gmbh Vorrichtung zur Steuerung eines Fluidflusses
DE102009054064A1 (de) 2009-11-20 2011-07-21 Bauer Kompressoren GmbH, 81477 Kondensatablasssystem und Kondensatventil
DE102014223262A1 (de) 2014-11-14 2016-05-19 Volkswagen Aktiengesellschaft Kältemittelverdichter
DE102017219004A1 (de) * 2017-10-24 2019-04-25 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Elektromotorische Ölpumpe mit Rückschlagventil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4025488A1 (de) * 1989-08-10 1991-02-21 Guenter Stein Rueckschlagventil
DE19501725A1 (de) * 1994-02-15 1995-08-17 Barmag Barmer Maschf Rückschlagventil insbesondere für Kunststoffschmelzen
GB2287085A (en) * 1994-03-05 1995-09-06 Actis Non-return valve
WO2004083696A1 (fr) * 2003-03-20 2004-09-30 Bosch Rexroth Ag Clapet anti-retour
US20050067024A1 (en) * 2003-09-25 2005-03-31 Herbert Strahberger Reverse-flow throttle valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4025488A1 (de) * 1989-08-10 1991-02-21 Guenter Stein Rueckschlagventil
DE19501725A1 (de) * 1994-02-15 1995-08-17 Barmag Barmer Maschf Rückschlagventil insbesondere für Kunststoffschmelzen
GB2287085A (en) * 1994-03-05 1995-09-06 Actis Non-return valve
WO2004083696A1 (fr) * 2003-03-20 2004-09-30 Bosch Rexroth Ag Clapet anti-retour
US20050067024A1 (en) * 2003-09-25 2005-03-31 Herbert Strahberger Reverse-flow throttle valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008087051A1 (fr) * 2007-01-17 2008-07-24 Robert Bosch Gmbh Clapet anti-retour et injecteur muni d'un convertisseur hydraulique et d'un clapet anti-retour
US7789069B2 (en) 2007-01-17 2010-09-07 Robert Bosch Gmbh Check valve, and injector with hydraulic booster and check valve
US20230008417A1 (en) * 2021-07-09 2023-01-12 Goodrich Corporation Valve

Also Published As

Publication number Publication date
DE102005055360A1 (de) 2007-05-24

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