EP1108137A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1108137A1
EP1108137A1 EP00945543A EP00945543A EP1108137A1 EP 1108137 A1 EP1108137 A1 EP 1108137A1 EP 00945543 A EP00945543 A EP 00945543A EP 00945543 A EP00945543 A EP 00945543A EP 1108137 A1 EP1108137 A1 EP 1108137A1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel injection
actuator
injection valve
valve needle
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.)
Granted
Application number
EP00945543A
Other languages
German (de)
English (en)
Other versions
EP1108137B1 (fr
Inventor
Hubert Stier
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 EP1108137A1 publication Critical patent/EP1108137A1/fr
Application granted granted Critical
Publication of EP1108137B1 publication Critical patent/EP1108137B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • the fuel injector resulting from this document has a valve closing body which can be actuated by an actuator by means of a valve needle and which cooperates with a valve seat surface to form a sealing seat.
  • the fuel injector has a connection part and a functional part. An electrical connection and a fuel connection are provided on the connecting part.
  • the functional part has the actuator, a compression spring and a valve seat body on which the valve seat surface is formed. The entire actuating device required to actuate the fuel injection valve is thus accommodated in the functional part.
  • an electrical contact pin of the functional part is inserted into a socket of the connecting part, whereby the actuator is connected to the electrical connection of the connecting part.
  • a fuel channel of the functional part is sealingly connected to a fuel channel of the connecting part.
  • the fuel injector known from DE 197 12 591 AI has the following disadvantages. Since the actuating device is completely accommodated in the functional part which is pivoted relative to the connecting part, the valve housing of the fuel injector has a kink. This makes it more difficult to insert the fuel injection valve into a connection piece of the internal combustion engine, the fuel injection valve in particular not being able to be inserted into a cylindrical connection piece. In particular, this fuel injection valve cannot be inserted into a cylindrical receiving bore in a cylinder head, as is necessary in the case of fuel injection valves that directly inject into the combustion chamber of an internal combustion engine. Due to the arrangement of the electrical plug connection, the swivel angle of the fuel injector can already be specified during the manufacture of the connecting part.
  • a change in the swivel angle ⁇ can therefore only be achieved by changing the manufacturing process. Since the fuel injection valve is divided into a connection part and a functional part, the entire actuating device being accommodated in the functional part, the invention described in this publication is only suitable for this special fuel injection valve.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the pivoting angle can be adjusted independently of the special shape of the valve housing, so that the fuel injector can be used universally.
  • the actuating device can be arranged in the fuel injector regardless of the angular position of the valve needle be, so that the invention is suitable for any fuel injection valves.
  • valve seat surface is advantageously formed on a valve seat body, which rests on a spherical connecting surface on a valve housing of the fuel injector.
  • valve seat body and the valve housing are coordinated with one another in a particularly favorable manner, so that the pivot angle only has to be determined when the valve seat body is attached to the valve housing. It is particularly advantageous if the valve seat body is concave on the connecting surface.
  • valve housing has a recess through which the valve needle protrudes, it being particularly advantageous if the cross section of the recess for steplessly adjusting the pivoting angle is larger than the cross section of the valve needle.
  • the valve housing and the valve seat body can be manufactured independently of the swivel angle to be set, the desired swivel angle being able to be defined individually.
  • the valve seat body can also be fastened to the valve housing with a union nut.
  • the actuator is advantageously designed to be piezoelectric or agnetostrictive, which results in a variable
  • Valve needle stroke of the valve needle and a large actuation force result. It is advantageous that the actuator acts on the valve needle via an actuating element. As a result, the valve-side valve region of the fuel injection valve can be made slim. This is particularly useful when the fuel injection valve is used as an injection valve for injecting fuel directly into an internal combustion engine, since there is generally only a small installation space available in the area of the attachment piece on the combustion chamber of the internal combustion engine.
  • An end face of the actuating element advantageously bears against a valve needle head of the valve needle. It is advantageous that the actuating side of the actuating element and / or the valve needle head is partially spherical or lenticular. This ensures the fit between valve needle and actuating element regardless of the set swivel angle.
  • the actuator acts on the valve needle via an actuator pot that seals the actuator. This results in a compact structure of the fuel injector.
  • An end face of the actuator pot advantageously bears against a valve needle head of the valve needle. It is advantageous that the end face of the actuator pot and / or the valve needle head is partially spherical or lenticular. As a result, the accuracy of fit between the actuator and the actuating element is ensured regardless of the set swivel angle.
  • Figure 1 is an axial section through an embodiment of a fuel injector according to the invention.
  • Fig. 2 shows the detail designated II in Fig. 1;
  • Fig. 3 shows an alternative embodiment of the detail designated II in Fig. 1.
  • the fuel injection valve 1 shows a partial axial sectional view of a fuel injection valve 1 according to the invention.
  • the fuel injection valve 1 is used in particular for the direct injection of fuel, in particular gasoline, into a combustion chamber of a mixture-compressing, spark-ignited internal combustion engine as a so-called gasoline direct injection valve.
  • the fuel injection valve 1 according to the invention is also suitable for other applications.
  • the fuel injection valve 1 has a front part 2, a middle part 3 and a rear part 4, which together form a valve housing 5 of the fuel injection valve 1.
  • a fuel connection 6 is formed on the rear part 4 of the fuel injection valve 1.
  • the rear part 4 of the fuel injection valve 1 is partially surrounded by a plastic element 7, on which an e- ⁇ electrical connection 8 is formed, via which an electrical cable can be connected to the fuel injection valve 1.
  • An actuator 10, which is arranged in the middle part 3 of the fuel injection valve 1, can be controlled by a control signal conducted via the electrical cable.
  • the actuator 10 is enclosed by an actuator pot 11, which has an elastic, wavy region 12, so that the actuator pot 11 can be elastically deformed, in particular in the direction of a valve longitudinal axis 13. Besides, will the actuator 10 is biased by the elastic, wavy region 12.
  • the actuator pot 11 is connected to a sealing plate 14 on a mounting surface 15.
  • an actuator chamber 16, in which the actuator 10 is located is hermetically sealed against an interior 17 of the fuel injection valve 1.
  • the actuator 10 When the actuator 10 is actuated, it expands, the elastic, wavy region 12 of the actuator cup 11 being elastically deformed, so that the actuator chamber 16 remains sealed against the interior 17.
  • the sealing plate 14 has at least one recess 18, which is part of a fuel line 19a to 19d, 18 leading into the interior 17.
  • the actuator 10 acts on an actuating element 25 via the actuator pot 11.
  • the actuating element 25 has a pressure plate 26 which has an enlarged cross section.
  • the actuating element 25 has a section 27 which has a reduced diameter.
  • the actuating element 25 is guided by guide elements 28, 29 which have slot-shaped recesses 30a, 30b, 31a, 31b, through which the fuel flows from the interior 17 into a fuel chamber 32.
  • FIG. 2. 1 and 2 An enlarged view of this section is shown in FIG. 2. 1 and 2, the same reference numerals are used for matching elements.
  • valve seat body 40 On the valve housing 5 of the fuel injection valve 1, a valve seat body 40 is fastened, which has a spherical connecting surface 41 on a part-spherical End 42 of the valve housing 5 abuts.
  • the valve seat body 40 is connected to the valve housing 5 by means of a weld seam 43 which runs around a concavely curved collar 34 of the valve seat body 40.
  • the valve seat body 40 has a valve seat surface 44 which cooperates with a valve closing body 46 which can be actuated by means of a valve needle 45 to form a sealing seat.
  • the valve needle 45 is integrally connected to the valve closing body 46 and a valve needle head 47 in the exemplary embodiment.
  • valve closing body 46 is pressed with a closing force generated by a compression spring 48, which acts on the valve needle 45 via the valve needle head 47, against the valve seat surface 44, the compression spring 48 being on the one hand on a collar 49 of the valve seat body 40 and on the other hand on a support surface 50, which is formed on the valve needle head 47.
  • a compression spring 48 which acts on the valve needle 45 via the valve needle head 47, against the valve seat surface 44, the compression spring 48 being on the one hand on a collar 49 of the valve seat body 40 and on the other hand on a support surface 50, which is formed on the valve needle head 47.
  • the fuel injector 1 is actuated via the actuator 10, which is piezoelectric, magnetostri__tiv or
  • Actuation of the actuator 10 becomes a stroke of the actuator
  • Actuating element 25 generates, whereby the valve needle 45 is actuated and the valve closing body 46 lifts off the valve seat surface 44, as a result of which fuel is sprayed out of the fuel injection valve 1 which opens outwards here.
  • the supply of fuel takes place z. B. via a swirl groove 51 formed on the valve needle 45
  • a valve needle axis 54 of the valve needle 45 includes a pivot angle ⁇ with an axis of the actuating element 25, which in this exemplary embodiment corresponds with an axis 55 of the actuator 10, the pivot angle ⁇ being predeterminable by pivoting the valve seat body 40 relative to the valve housing 5 S is.
  • the axis of the actuating element 25 also coincides with the longitudinal valve axis 13 of the fuel injector 1. So that the swivel angle ⁇ can be set as desired, the valve housing 5 has a recess 56 through which the valve needle 45 projects. The cross section of the recess 56 is larger than the cross section of the valve needle 45.
  • valve seat body 40 Before the valve seat body 40 is connected to the front part 2 of the valve housing 5 by the weld 43, the valve seat body 40 can be moved as desired on the connecting surface 41 at the end of the valve housing 5, so that the pivoting angle can be adjusted continuously. Since the valve seat body 40 is concave on the connecting surface 41, the fulcrum is located inside the fuel injector 1, as a result of which the valve needle head 47 essentially remains in its place, the surface 53 of the part-spherical valve needle head 47 on the flat end face 52 of the actuating element 25 rolls and by the partially spherical design of the valve needle head 47 at any pivot angle there is a functional concern of the valve needle head 47 on the end face 52 of the actuating element 25.
  • valve seat body 40 can be fastened to the valve housing 25 by the weld 43.
  • This attachment can also be different, e.g. B. can be achieved with a union nut.
  • Fig. 3 shows an alternative embodiment of the detail designated II in Fig. 1. Elements already described are provided with the same reference numerals, so that a repetitive description is unnecessary.
  • the actuator 10 acts directly via an end face 52 of the actuator pot 11 on the curved surface 53 of the valve needle head 47 of the valve needle 45.
  • the end face 52 of the actuator pot 11 is in this Embodiment just formed, so that the partially spherical valve needle head 47 rolls on actuation of the actuator 10 on the end face 52 and thereby an advantageous contact of the valve needle head 47 on the end face 52 of the actuator pot 11 is given.
  • the invention is not restricted to the exemplary embodiments described.
  • the invention is also suitable for an internally opening fuel injection valve 1.

Landscapes

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

Abstract

Soupape (1) d'injection de carburant, en particulier pour systèmes d'injection de carburant de moteurs à combustion interne, qui comporte un obturateur (46) pouvant être actionné par un actionneur (10) par l'intermédiaire d'un pointeau (45) de soupape. L'obturateur coopère avec une surface (44) de siège de soupape pour former un siège étanche. L'axe (54) du pointeau (45) de soupape forme avec un axe (55) de l'actionneur (10) un angle de pivotement (α) prédéfini.
EP00945543A 1999-06-19 2000-05-20 Soupape d'injection de carburant Expired - Lifetime EP1108137B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19928204 1999-06-19
DE19928204A DE19928204A1 (de) 1999-06-19 1999-06-19 Brennstoffeinspritzventil
PCT/DE2000/001625 WO2000079124A1 (fr) 1999-06-19 2000-05-20 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1108137A1 true EP1108137A1 (fr) 2001-06-20
EP1108137B1 EP1108137B1 (fr) 2004-12-22

Family

ID=7911903

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00945543A Expired - Lifetime EP1108137B1 (fr) 1999-06-19 2000-05-20 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6543702B1 (fr)
EP (1) EP1108137B1 (fr)
JP (1) JP2003502577A (fr)
KR (1) KR20010072698A (fr)
DE (2) DE19928204A1 (fr)
WO (1) WO2000079124A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19963568A1 (de) * 1999-12-29 2001-07-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10007733A1 (de) * 2000-02-19 2001-08-23 Daimler Chrysler Ag Einspritzventil
JP4427323B2 (ja) * 2001-08-08 2010-03-03 シーメンス アクチエンゲゼルシヤフト 配量装置
DE10147669A1 (de) * 2001-09-27 2003-04-10 Bosch Gmbh Robert Piezoaktor zur Betätigung eines mechanischen Bauteils
DE10153630A1 (de) * 2001-10-31 2003-07-10 Bosch Gmbh Robert Brennstoffeinspritzventil
US20070246224A1 (en) * 2006-04-24 2007-10-25 Christiaan Krauss Offset valve system for downhole drillable equipment
WO2008084502A1 (fr) * 2007-01-09 2008-07-17 Ucal Fuel Systems Limited Moteur à combustion interne présentant un moyen pour le doter d'un injecteur
DE102009000184A1 (de) 2009-01-13 2010-07-15 Robert Bosch Gmbh Brennstoffeinspritzventil
US9546633B2 (en) 2012-03-30 2017-01-17 Electro-Motive Diesel, Inc. Nozzle for skewed fuel injection
CN104984876B (zh) * 2015-07-21 2017-08-25 惠州市德赛自动化技术有限公司 一种斜插式点胶装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB611620A (en) * 1945-11-13 1948-11-02 Texaco Development Corp Improvements in or relating to the operation of internal combustion engines having airless injection of fuel
US3995813A (en) * 1974-09-13 1976-12-07 Bart Hans U Piezoelectric fuel injector valve
DE2501283A1 (de) * 1975-01-15 1976-07-22 Bosch Gmbh Robert Einspritzventil
DE19703836C2 (de) * 1997-02-01 1999-09-09 Bertsch Elektromagnetisches Einspritzventil für Brennkraftmaschinen
DE19712591A1 (de) * 1997-03-26 1998-10-01 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zur Herstellung sowie Verwendung eines Brennstoffeinspritzventils
DE59811027D1 (de) * 1997-04-04 2004-04-29 Siemens Ag Einspritzventil mit Mitteln zur Kompensation der thermischen Längenänderung eines Piezoaktors
JP3771361B2 (ja) * 1997-11-26 2006-04-26 株式会社日立製作所 燃料噴射弁
US6308901B1 (en) * 2000-02-08 2001-10-30 Siemens Automotive Corporation Fuel injector with a cone shaped bent spray

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0079124A1 *

Also Published As

Publication number Publication date
KR20010072698A (ko) 2001-07-31
WO2000079124A1 (fr) 2000-12-28
JP2003502577A (ja) 2003-01-21
EP1108137B1 (fr) 2004-12-22
DE50009025D1 (de) 2005-01-27
US6543702B1 (en) 2003-04-08
DE19928204A1 (de) 2000-12-21

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