WO2016150602A1 - Corps de soupape de commande - Google Patents

Corps de soupape de commande Download PDF

Info

Publication number
WO2016150602A1
WO2016150602A1 PCT/EP2016/052300 EP2016052300W WO2016150602A1 WO 2016150602 A1 WO2016150602 A1 WO 2016150602A1 EP 2016052300 W EP2016052300 W EP 2016052300W WO 2016150602 A1 WO2016150602 A1 WO 2016150602A1
Authority
WO
WIPO (PCT)
Prior art keywords
restricted
conduit
transverse face
outlet conduit
main
Prior art date
Application number
PCT/EP2016/052300
Other languages
English (en)
Inventor
David MENU
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 EP16703504.7A priority Critical patent/EP3271568A1/fr
Priority to CN201680016872.4A priority patent/CN107429645A/zh
Publication of WO2016150602A1 publication Critical patent/WO2016150602A1/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
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/008—Arrangement of fuel passages inside of injectors
    • 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 fuel injector comprises the stack-up of a nozzle assembly, a control valve and an actuator assembly.
  • the control valve indirectly controls the motions of a valve member, arranged in the nozzle assembly, by retaining or releasing fuel at high pressure in a control chamber also arranged in the nozzle assembly. This is done by opening and closing a fluid communication between the control chamber and a low pressure reservoir.
  • the control valve has a cylindrical body extending between a first transverse face adapted to be in sealing surface contact against a face of the actuator assembly and, a second transverse face adapted to be in sealing surface contact against an upper face of the nozzle assembly.
  • In the valve body extend an inlet line and an outlet line, the inlet line having a main inlet conduit and a restricted inlet conduit and, the outlet line having a restricted outlet conduit, a main outlet conduit and a valve as such.
  • the main inlet conduit extends between the two transverse faces and, in use, fuel at high pressure flows from an upper inlet conduit extending in the actuator assembly, then through said main inlet conduit, then in a nozzle conduit extending in the nozzle assembly.
  • the restricted inlet conduit extends from a first T-junction, where it joins the main inlet conduit, to the second transverse face where it opens in a location that, in use, is in fluid communication with the control chamber.
  • the restricted outlet conduit opens in the second transverse face, in a location that in use is also in fluid communication with the control chamber, and then it extends to a second T-junction where it joins the main outlet conduit.
  • Said main outlet conduit also opens in the second transverse face, but in a location that in use is sealingly closed by the upper face of the nozzle assembly, then it extends to a valve bore, in which is slidably arranged a valve spool controlling a valve seat, that is said fluid communication between the control chamber and a low pressure reservoir.
  • the main outlet conduit has a large cross section while the restricted outlet conduit has a much smaller cross section creating a restrictor through which only a restricted flow of fuel may flow to exit the control chamber.
  • the restricted inlet conduit and the restricted outlet conduit have small calibrated cross section creating flow restrictors through which only a limited flow of fuel may enter or exit the control chamber.
  • the restricted conduits are difficult to manufacture, difficult to clean and, as the maximum operational pressure of the fuel injectors regularly increases, said restricted conduits are areas of stress concentration where cracks may occur and propagate in the valve body.
  • the body extends along a main axis from a first transverse face, adapted to be in surface contact against an actuator assembly and, a second transverse face, adapted to be in 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.
  • the valve body is provided with:
  • the inlet line wherein, in use, flows high pressure fuel
  • the inlet line comprising a main inlet conduit extending between said two transverse faces, and also with a restricted inlet conduit extending between an opening in the second transverse face, that in use is in fluid communication with the control chamber, and the main inlet conduit and with,
  • 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 the main outlet conduit in the second transverse face is sealed in use by the upper face of the nozzle assembly, and also with 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 extends and opens on the main outlet conduit.
  • At least one of the restricted inlet conduit or the restricted outlet conduit is a groove formed on the surface of the second transverse face so that, in use, said groove is sealingly covered and closed by the upper face of the nozzle assembly.
  • both the restricted inlet conduit and the restricted outlet conduit are grooves formed on the surface of the second transverse face.
  • the invention further extends to a control valve assembly having a control valve body as described in the preceding paragraphs.
  • the invention further extends to a fuel injector having a control valve assembly as described in the preceding paragraph.
  • FIG. 1 is a axial section of a fuel injector.
  • FIG. 2 is a semitransparent isometric view of a valve body enabling to visualize the various internal channels therein made.
  • FIG. 3 is another semitransparent isometric view of the valve body focusing on the lower face of the body.
  • 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 16.
  • the nozzle assembly 12 comprises the complementary arrangement of an elongated cylindrical nozzle body 18 extending from a transverse upper face 20 of to a pointy tip 22.
  • the nozzle body 18 is also provided with an internal axial bore 24 in which a needle valve 26 is slidably arranged and guided between an upper guide 28 and a lower guide 30.
  • the upper guide 28 comprises the top end 32 of the needle 26 adjusted in a guiding bore 34, the volume of said bore 34 that is above the top end 32 of the needle 26 forming a needle valve control chamber 36.
  • the lower guide 30 comprises a cylindrical face of the needle 26 adjusted in a lower portion of the bore 24.
  • the control valve assembly 14 comprises a cylindrical valve body 38 axially XI extending between a first transverse face 40, drawn on the top of the figure, and, a second transverse face 42 that is in surface sealing contact against the upper face 20 of the nozzle body 18.
  • valve body 38 is now detailed in reference to figures 2 and 3.
  • inlet line 44 and an outlet line 46 in which, in use, fuel may flow to enter or exit the control chamber 36.
  • the inlet line 44 comprises a main inlet conduit 48 and a restricted inlet conduit 50.
  • the main inlet conduit 48 extends between an upper opening 52 in the first transverse face 40 and a lower opening 54 in the second transverse face 42 and, the restricted inlet conduit 50 is indeed a groove formed on the surface of the second transverse face 42 and extending between the lower opening 54 and an inlet semi-spherical recess 56 also formed in the second transverse face 42.
  • the outlet line 46 comprises a restricted outlet conduit 58, a main outlet conduit 60 and a valve 62, itself having a hydraulic bore 64 adapted to receive in a slidable arrangement an armature-and- spool-assembly 66.
  • the hydraulic bore 64 axially extends along a valve axis X2 that is parallel and offset from the main axis XI . This offset was introduced in EP0740068 and it presents many advantageous characteristics benefitting the injector. 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.
  • the hydraulic bore 64 opens in the bottom face of a large recess 68, itself opening in the first transverse face 40 of the valve body.
  • the opening of the hydraulic bore 64 at the bottom of the recess 68 forms a valve seat 70 that may, as a function of the valve spool 66 position, open or close a fluid communication between the hydraulic bore 64 and a drain or low pressure reservoir.
  • the main outlet conduit 60 extends in straight direction from an opening 72 in the second transverse face 42, said opening being in use sealingly closed by the upper face of the nozzle body, to an opposite end opening in the hydraulic bore 64.
  • the restricted outlet conduit 58 is indeed also a groove formed on the surface of the second transverse face 42 and extending between the opening 72 of the main outlet conduit in the second transverse face and an outlet semi-spherical recess 74 also formed in the second transverse face 42.
  • All the transverse faces have mirror surface finish so, when the injector 10 is fully assembled, the second transverse face 42 is in surface contact against the transverse upper face 20 of the nozzle body and the opening 72 of the main outlet conduit in the second transverse face and the restricted conduits 50, 58, are sealingly covered and closed.
  • the opening 54 of the main inlet conduit in the second transverse face is in fluid continuity with another portion of the inlet line, said another portion extending in the nozzle assembly and, the inlet and outlet recesses 56, 74, are in fluid communication with the control chamber 36.
  • fuel at high pressure flows in the main inlet conduit 48 and, a limited quantity of fuel flows through the restricted inlet conduit 50 to enter the control chamber 36.
  • valve seat 70 When the valve seat 70 is closed, the pressure in the control chamber 36 increases and the needle valve 26 is pushed in a closed position.
  • valve seat 70 When the valve seat 70 is open, the fuel pressurized in the control chamber 36 is enabled to exit and it flows through the restricted outlet conduit 58 until it joins the main outlet conduit 60 then the hydraulic bore 64.
  • This arrangement of restricted conduits 50, 58, as grooves in the second transverse face 42 of the valve body is easier to manufacture that the standard drilling through the body; it is easier to clean the groove after manufacturing.
  • the standard drillings have circular cross sections while the grooves enable other shapes such as a rectangular or triangular cross sections.

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 la soupape de commande (38) d'un injecteur de carburant, ledit corps comprenant : une canalisation d'admission (44) comprenant un conduit d'admission principal (48) s'étendant entre deux faces transversales (40, 42) ; et un conduit d'admission restreint (50) s'étendant entre une ouverture (54) dans la seconde face transversale (42), qui, lors de l'utilisation, est en communication fluidique avec une chambre de commande (36), et le conduit d'admission principal (48) ; et une canalisation de sortie (46) comprenant un conduit de sortie principal (60) s'étendant dans le corps de soupape (38) à partir de la seconde face transversale (42) jusqu'à un trou hydraulique (64), l'ouverture (72) dudit conduit de sortie principal (60) dans la seconde face transversale (42) étant scellée lors de l'utilisation par la face supérieure (20) d'un ensemble buse ; et également un conduit de sortie restreint (58) s'ouvrant dans la seconde face transversale (42) à un endroit qui, lors de l'utilisation, est en communication fluidique avec la chambre de commande (36), le conduit de sortie restreint (58) s'étendant et s'ouvrant sur le conduit de sortie principal (60). Le conduit d'admission restreint (50) et/ou le conduit de sortie restreint (58) est une rainure formée sur la surface de la seconde face transversale (42) de telle sorte que, lors de l'utilisation, ladite rainure soit recouverte et fermée hermétiquement par la face supérieure (20) de l'ensemble buse.
PCT/EP2016/052300 2015-03-20 2016-02-03 Corps de soupape de commande WO2016150602A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16703504.7A EP3271568A1 (fr) 2015-03-20 2016-02-03 Corps de soupape de commande
CN201680016872.4A CN107429645A (zh) 2015-03-20 2016-02-03 控制阀本体

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1504729.3A GB201504729D0 (en) 2015-03-20 2015-03-20 Control valve body
GB1504729.3 2015-03-20

Publications (1)

Publication Number Publication Date
WO2016150602A1 true WO2016150602A1 (fr) 2016-09-29

Family

ID=53052123

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/052300 WO2016150602A1 (fr) 2015-03-20 2016-02-03 Corps de soupape de commande

Country Status (4)

Country Link
EP (1) EP3271568A1 (fr)
CN (1) CN107429645A (fr)
GB (1) GB201504729D0 (fr)
WO (1) WO2016150602A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009001176A1 (de) * 2009-02-26 2010-09-02 Robert Bosch Gmbh Kraftstoffeinspritzventil
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 (4)

* 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.
FR2953268B1 (fr) * 2009-12-02 2012-04-06 Bosch Gmbh Robert Soupape electromagnetique de commande d'un injecteur ou de regulation de pression d'un accumulateur de carburant a haute pression
DE102010029907A1 (de) * 2010-06-10 2011-12-15 Robert Bosch Gmbh Kraftstoffinjektor mit einem Piezoinjektor und seitlichem Hochdruckanschluss und seitlichem Leckölanschluss
AT512960B1 (de) * 2012-05-22 2014-03-15 Bosch Gmbh Robert Injektor eines modularen Common-Rail-Kraftstoffeinspritzsystems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009001176A1 (de) * 2009-02-26 2010-09-02 Robert Bosch Gmbh Kraftstoffeinspritzventil
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

Also Published As

Publication number Publication date
CN107429645A (zh) 2017-12-01
EP3271568A1 (fr) 2018-01-24
GB201504729D0 (en) 2015-05-06

Similar Documents

Publication Publication Date Title
RU2459107C2 (ru) Топливный инжектор (варианты)
CA2590017A1 (fr) Dispositif de vanne de regulation de fluide
US10077748B2 (en) Fuel injector for common rail
JP2017519938A (ja) 内燃エンジンのための燃料噴射器
US20120012681A1 (en) Fuel injector having balanced and guided plunger
US9879644B2 (en) Fuel injector with variable area pintle nozzle
EP3183450B1 (fr) Agencement de vanne de commande
EP3274582B1 (fr) Agencement de soupape de commande
EP2354530B1 (fr) Aiguille pour vanne aiguille
WO2016150602A1 (fr) Corps de soupape de commande
KR20140022457A (ko) 밸브 조립체 및 이를 포함하는 연료 펌프
CN202769012U (zh) 先导式二位二通电磁截止阀
CN106460750B (zh) 用于喷射流体的喷射器
CN203703240U (zh) 电磁阀
US20190056036A1 (en) Spool valve
CN100402834C (zh) 用于内燃机的燃料喷射阀
CN107002620B (zh) 控制阀组件
US9399975B2 (en) Solenoid fluid injector with corrosion prevention structure
CN104653536B (zh) 一种负载敏感阀
US9631738B2 (en) Guiding deformation in seated hydraulic metering devices
KR20070113950A (ko) 연료 제어 서보 밸브 및 이를 구비한 연료 인젝터
JP2010174823A (ja) 燃料噴射弁
DE102007062792A1 (de) Kraftstoffeinspritzventil
EP2422070B1 (fr) Injecteur de carburant
JP2008151042A (ja) 燃料噴射弁

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16703504

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2016703504

Country of ref document: EP