WO2016150603A1 - Agencement de soupape de commande - Google Patents

Agencement de soupape de commande Download PDF

Info

Publication number
WO2016150603A1
WO2016150603A1 PCT/EP2016/052301 EP2016052301W WO2016150603A1 WO 2016150603 A1 WO2016150603 A1 WO 2016150603A1 EP 2016052301 W EP2016052301 W EP 2016052301W WO 2016150603 A1 WO2016150603 A1 WO 2016150603A1
Authority
WO
WIPO (PCT)
Prior art keywords
outlet conduit
valve body
section
junction
main
Prior art date
Application number
PCT/EP2016/052301
Other languages
English (en)
Inventor
David Bonneau
Peter Voigt
Richard Denis Jacques Alain ENTERS
Original Assignee
Delphi International Operations Luxembourg S.À R.L.
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 Delphi International Operations Luxembourg S.À R.L. filed Critical Delphi International Operations Luxembourg S.À R.L.
Priority to CN201680017088.5A priority Critical patent/CN107429651B/zh
Priority to EP16702576.6A priority patent/EP3274582B1/fr
Publication of WO2016150603A1 publication Critical patent/WO2016150603A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0043—Two-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/28—Details of throttles in fuel-injection apparatus

Definitions

  • the present invention relates generally to a fuel injector and more particularly to a control valve arrangement.
  • a control valve indirectly controls the motions of a valve member, also identified as a needle in reference to its elongated shape, by opening and closing an outlet conduit enabling fuel at high pressure to exit a control chamber which internal pressure solicits the needle.
  • the control valve comprises a cylindrical body extending between a first transverse face and a second transverse face.
  • the body is further provided with a hydraulic bore opening in a recess, itself largely opening in the first transverse face.
  • a valve spool integral within a magnetic armature-and-spool-assembly. While the spool slides in the bore, the disc-shape armature displaces in the recess as a function of a magnetic field generated by a controlled solenoid.
  • the spool and body further define a valve seat which opens or closes when said assembly translates.
  • the outlet conduit is usually made of two distinct straight portions.
  • a long portion extends from the second face to the hydraulic bore.
  • the transverse faces are in sealing surface contact with complementary faces of other injector bodies so, the long straight portion is then sealed at its extremity opening on the second face.
  • the outlet conduit also comprises a short portion opening in the second face in a location that is in fluid communication with the control chamber and, said short portion extends toward the long portion and opens into it in a T-junction.
  • the valve seat opens, the fuel at high pressure exits the control chamber by flowing in the short portion up to the T-junction where it deviates and follows the long portion of the outlet channel until reaching the hydraulic bore.
  • the short and long portions are typically cylindrical of relatively similar diameter.
  • a valve body of the control valve of a fuel injector said body extending along a main axis from a first transverse face, adapted to be in sealing surface contact against an actuator assembly and, a second transverse face adapted to be in sealing surface contact against an upper face of a nozzle assembly.
  • the nozzle assembly is provided with a valve member moveable between a closed position and an open position under the influence of fuel pressure in a control chamber, and, the valve body is provided with an inlet line, wherein in use flows high pressure fuel toward an opening that in use is in fluid communication with the control chamber and with, an outlet line in which, in use, fuel exits the control chamber and flows to a drain or low pressure reservoir.
  • the outlet line comprises a valve having a valve spool slidably arranged in a hydraulic bore, a main outlet conduit extending in the valve body from the second transverse face to the hydraulic bore.
  • the opening of said main outlet conduit in the second transverse face is sealingly closed in use, by the upper face of the nozzle assembly.
  • the outlet line also comprises a restricted outlet conduit opening in the second transverse face in a place that, in use, is in fluid communication with the control chamber, the restricted outlet conduit extending to a T-junction where it joins the main outlet conduit.
  • the main outlet conduit has a specific non- circular cross section having a curvature bigger than the curvature of the restricted outlet conduit.
  • the main outlet conduit has a specific non-circular cross section that is at least four times the curvature of the restricted outlet conduit.
  • the main outlet conduit has a flat face in which opens the restricted outlet conduit.
  • the main outlet conduit has an oblong cross section, the restricted outlet conduit opening in a flat face of the oblong section.
  • a portion of the main outlet conduit in the area of the T-junction, has an enlarged radius curvature in which opens the restricted outlet conduit.
  • the main outlet conduit has an elliptical cross section, the restricted outlet conduit opening in the larger radius of the ellipsis, so that the axis along which extends the restricted outlet conduit perpendicularly intersects the main axis of the ellipsis.
  • the main outlet conduit may have a constant cross section all along its length.
  • the specific cross section of the main outlet conduit is limited to a portion of the length, said portion comprising the T- junction.
  • the restricted outlet conduit may have a circular cross section.
  • the invention further extends to a control valve assembly having a control valve body as set in any one of the preceding paragraphs.
  • the invention further extends to a fuel injector comprising an actuator, a nozzle assembly, and a control valve assembly as set in the preceding paragraphs.
  • FIG. 1 is a partial axial section of a fuel injector provided with a control valve arrangement as per a first embodiment of the invention.
  • FIG. 1 is an axial section of the control valve of figure 1.
  • FIG. 3 is a translucid isometric view of the body of the valve.
  • FIG. 4 is a magnified detail of figure 3 viewed from the opposite direction as in figure 3.
  • a fuel injector 10 extending along a main axis XI and which comprises the stack-up of nozzle assembly 12 over which are a control valve assembly 14 then an actuator assembly.
  • the nozzle assembly 12 comprises the complementary arrangement of an elongated cylindrical nozzle body 16 over which is positioned an upper guide body 18.
  • This arrangement 16, 18, axially XI extends from a transverse upper face 20 of the upper guide body 18 to a pointy tip 22 of the nozzle body 16.
  • This arrangement 16, 18, is also provided with an internal axial bore 24 in which a needle 26 is slidably arranged and guided between an upper guiding means 28 and a lower guiding means 30.
  • the upper guiding means 28 comprises the top end 32 of the needle 26 adjusted in a guiding bore 34 axially arranged in the upper guide body 18 and, the lower guiding means 30 comprises a cylindrical face 36 of the needle 26 adjusted in a lower portion 38 of the bore 24.
  • the control valve assembly 14 comprises a cylindrical valve body 36 axially XI extending between a first transverse face 38, drawn on the top of the figure, and, a second transverse face 40 that is in surface sealing contact against the upper face 20 of the upper guide body 18.
  • Said valve body 36 is also provided with a hydraulic bore 42 that extends along a second axis X2 parallel and offset relative to the main axis XI .
  • This offset introduced in EP0740068, presents many advantageous characteristics.
  • Such an injector is used for the purpose of the present description but, the invention could also benefit other injectors were the two axis are aligned.
  • Said hydraulic bore 42 opens in the bottom face 44 of a large recess 46, itself opening in the first transverse face 38 of the valve body.
  • the valve body 36 is further provided with an outlet line 48 comprising a main outlet conduit 50 and a restricted outlet conduit 52.
  • the main outlet conduit 50 extends from the second transverse face 40 of the valve body to the hydraulic bore 42 while, the restricted outlet conduit 52 also extends from the from the second transverse face 40 of the valve body but joins and interconnects with the main outlet conduit 50 into a T-junction 54.
  • the main outlet conduit 50 and restricted outlet conduit 52 interconnect forming an angle A that is substantially a right angle and, the restricted outlet conduit 52 is of a smaller cross section SI than the cross section S2 of the main outlet conduit 50, the restricted outlet conduit forming a fluid restriction.
  • the main outlet conduit 50 When arranged in surface sealing contact with the nozzle assembly 12, the main outlet conduit 50 is sealingly closed by the transverse upper face 20 of the upper guide and, the restricted outlet conduit 52 opens over a control chamber 56 arranged in the guiding bore 34 above the needle 26.
  • the restricted outlet conduit 52 opens in a semi spherical outlet recess provided the ceiling face of said control chamber 56 and, therefore the outlet line 48 has an entry in the control chamber 56 and an exit in the hydraulic bore 42.
  • an armature-and-valve-spool assembly 58 that comprises a magnetic armature 62 having the shape of a thick disc at the centre of which is inserted and crimped a spool shaft 60.
  • the spool shaft 60 is slidable in the hydraulic bore 24 and the armature 62 moves inside the recess 46.
  • the opening on the hydraulic bore 42 in the bottom face of the recess 46 is surrounded by a valve seat 64 that opens or closes depending on the displacements of the armature-and-valve-spool assembly 58.
  • the armature-and- spool assembly 58 may commute between the closed position and an open position at a frequency of several hundred Hertz meaning that fuel pressurised at 2000 bars, or more, flows through the T-junction 54 at the same frequency generating picks of mechanical stresses in the area.
  • the section S2 of the main outlet conduit 50 of the outlet line 48 is made oblong, the restricted outlet conduit 52 opening in a flat side of the oblong shape.
  • the main outlet conduit 50 of the line 48 has an oblong section S2 from its opening on the second transverse face 40 of the valve body to a point situated just upstream the T-junction 54. After that point, the section S2 changes into a circular section up to the other end opening in the hydraulic bore 42.
  • the main outlet conduit 50 has an oblong section all along its length from the second transverse face 40 to the hydraulic bore 42.
  • the restricted outlet conduit 52 joins the main outlet conduit 50 in an area where the radius R2 of curvature of the main outlet conduit 50 is much larger than the radius Rl of the restricted outlet conduit 52.
  • the expression "much larger” is to be interpreted in that the radius R2 of the section S2 of the main outlet conduit 50 is "at least four time larger" than the radius Rl of the section SI of the restricted outlet conduit 52, measured in the area where the two conduits merge. This is mathematically given by — > 4
  • the restricted outlet conduit 52 opens in a flat face 66 such as in an oblong section as previously described, which by definition has an infinite radius of curvature R2.
  • Other possible choices are sketched on figures 6 or 7 where, on figure 6 the main outlet conduit 50 has an elliptic section S2, the restricted outlet conduit opening in the area of greatest radius R2. On figure 7, the main outlet conduit 50 has a semi-circular section S2, the restricted outlet conduit 52 opening in the flat side.
  • Many other choices of sections being possible, those presented being just example.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un corps de soupape de la soupape de commande d'un injecteur de carburant, ledit corps étant doté d'une canalisation d'admission et d'une canalisation d'évacuation dans laquelle, lors de l'utilisation, du carburant s'écoule vers un tuyau d'écoulement. La canalisation d'évacuation comprend un conduit d'évacuation principal (50) s'étendant dans le corps de soupape et un conduit d'évacuation restreint (52) raccordant le conduit d'évacuation principal (50). Le conduit d'évacuation principal (50) présente une section transversale spécifique qui est non-circulaire, ladite section transversale présentant une courbure supérieure à la courbure du conduit d'évacuation restreint (52).
PCT/EP2016/052301 2015-03-26 2016-02-03 Agencement de soupape de commande WO2016150603A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201680017088.5A CN107429651B (zh) 2015-03-26 2016-02-03 控制阀装置
EP16702576.6A EP3274582B1 (fr) 2015-03-26 2016-02-03 Agencement de soupape de commande

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1505094.1A GB201505094D0 (en) 2015-03-26 2015-03-26 Control valve arrangement
GB1505094.1 2015-03-26

Publications (1)

Publication Number Publication Date
WO2016150603A1 true WO2016150603A1 (fr) 2016-09-29

Family

ID=53052422

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/052301 WO2016150603A1 (fr) 2015-03-26 2016-02-03 Agencement de soupape de commande

Country Status (4)

Country Link
EP (1) EP3274582B1 (fr)
CN (1) CN107429651B (fr)
GB (1) GB201505094D0 (fr)
WO (1) WO2016150603A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3722590A4 (fr) * 2017-12-07 2021-07-28 Tianjin Shengoumei Engine Technology Consulting Co Injecteur de carburant à rail commun pour moteur diesel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114464842B (zh) * 2022-02-09 2023-01-31 擎能动力科技(苏州)有限公司 燃料电池系统流体循环系统前端构造、系统、新能源汽车

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1657435A1 (fr) * 2004-11-12 2006-05-17 C.R.F. Società Consortile per Azioni Injecteur de combustible pour moteur à combustion interne
EP2778386A1 (fr) * 2013-03-13 2014-09-17 Delphi International Operations Luxembourg S.à r.l. Ensemble soupape de commande et injecteur de carburant comprenant un ensemble soupape de commande

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2936025A1 (fr) * 2008-09-16 2010-03-19 Renault Sas Dispositif d'injection de fuide.
DE102010003202A1 (de) * 2010-03-24 2011-09-29 Robert Bosch Gmbh Common-Rail-Injektor mit druckausgeglichenem Schaltventil und zusätzlichem Speichervolumen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1657435A1 (fr) * 2004-11-12 2006-05-17 C.R.F. Società Consortile per Azioni Injecteur de combustible pour moteur à combustion interne
EP2778386A1 (fr) * 2013-03-13 2014-09-17 Delphi International Operations Luxembourg S.à r.l. Ensemble soupape de commande et injecteur de carburant comprenant un ensemble soupape de commande

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3722590A4 (fr) * 2017-12-07 2021-07-28 Tianjin Shengoumei Engine Technology Consulting Co Injecteur de carburant à rail commun pour moteur diesel

Also Published As

Publication number Publication date
CN107429651A (zh) 2017-12-01
EP3274582A1 (fr) 2018-01-31
GB201505094D0 (en) 2015-05-06
EP3274582B1 (fr) 2019-06-05
CN107429651B (zh) 2019-08-30

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