EP1519035A1 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

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Publication number
EP1519035A1
EP1519035A1 EP04104467A EP04104467A EP1519035A1 EP 1519035 A1 EP1519035 A1 EP 1519035A1 EP 04104467 A EP04104467 A EP 04104467A EP 04104467 A EP04104467 A EP 04104467A EP 1519035 A1 EP1519035 A1 EP 1519035A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
coupler
injection valve
duct
valve according
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
EP04104467A
Other languages
German (de)
English (en)
Other versions
EP1519035B1 (fr
Inventor
Guenther Hohl
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 EP1519035A1 publication Critical patent/EP1519035A1/fr
Application granted granted Critical
Publication of EP1519035B1 publication Critical patent/EP1519035B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • 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
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • F02M2200/705—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for filling or emptying hydraulic chamber, e.g. for compensating clearance or thermal expansion
    • F02M2200/706—Valves for filling or emptying hydraulic chamber

Definitions

  • the invention is based on a fuel injection valve according to the preamble of the main claim.
  • a Fuel injector with a piezoelectric or magnetostrictive actuator known, which in operative connection with a valve needle is.
  • the valve needle points to her discharge end on a valve closing body, which with a valve seat surface cooperates with a sealing seat.
  • One Coupler which compensates for changes in length of Components of the fuel injection valve, in particular of temperature-related changes in length of the actuator, serves, is arranged upstream of the actuator module.
  • the coupler points two mutually axially movable sections, the mesh with each other while doing an annular gap and a Form hydraulic volume.
  • the annular gap connects the Hydraulic volume with one under a pre-pressure Compensation space.
  • To compensate for changes in length of the Actuator becomes the hydraulic medium between the hydraulic volume and the compensation space exchanged, wherein the Annular gap serves as a throttle point.
  • a disadvantage of the above-mentioned document known fuel injection valve is in particular that the flow resistance and the hydraulic behavior of the From the annular gap formed throttle very strong Temperature fluctuations depends. This leads, for example at very long injection times, in which by the Coupler is lost a lot of stroke that, especially at low temperatures and correspondingly high viscosity of the Hydraulic medium, the stroke loss in the injection breaks by refilling the hydraulic volume is not complete can be compensated, or that at high Temperatures of the stroke loss is unfavorably fast, even with only a short load due to the actuation of the actuator, wherein the stroke loss in only short operating breaks not can be fully compensated again.
  • the fuel injection valve according to the invention with the Features of the main claim has the advantage over that hydraulic medium, except through the annular gap, in addition through the duct between hydraulic volume and Compensation space can be replaced.
  • the hydraulic Behavior of the coupler can be so, especially for different temperature conditions, easier to adjust.
  • the size or the cross section, through which or which Hydraulic medium between the hydraulic volume and the Compensating space can be exchanged over a large Temperature band are kept constant.
  • the coupler is in its hydraulic behavior more independent of Temperature fluctuations.
  • Fuel injector is in the duct one Throttle opening arranged, which in cross section clearly smaller than the duct.
  • the hydraulic Behavior of the coupler can thereby be further advantageous to be influenced.
  • Fuel injection valve has the at least one Duct a check valve.
  • the refilling the hydraulic volume from the expansion chamber can thereby be completed in less time.
  • the hydraulic Behavior of the coupler becomes even more independent of Temperature fluctuations.
  • first coupler section a unilaterally closed hollow cylindrical shape forms in the cylindrically shaped second coupler section at least partially engages while forming the gap.
  • the coupler can thereby in a particularly simple manner being constructed.
  • the duct in at least to arrange one of the coupler sections.
  • the coupler can thus be made more compact and easier.
  • the first flexible Section the first compensation space at least partially limited. This makes the coupler very easy build up.
  • the flexible section hole-shaped form.
  • the coupler can thereby better in the actuation strand of the Fuel injector to be integrated, since for example, the flexible section slightly so at the coupler can be arranged that the flexible section is not in the actuation axis of the actuation strand is located.
  • the flexible section can be made very easy and assemble.
  • the movements of the Actuator module transferred directly to the coupler sections and the dynamic properties of the Fuel injector are only minimally negative affected.
  • Fuel injection valve according to the invention are the gap, the hydraulic volume, the compensation chamber and the The duct completely with, ideally from an oil or a gel existing hydraulic medium filled.
  • Inventive fuel injection valve 1 is used in particular for the direct injection of fuel into a combustion chamber of a mixture-compressing, spark-ignited Internal combustion engine.
  • an interlocking housing upper part 4 and a coaxially arranged housing lower part 5 are a Valve needle 8, an actuator 2, whose internal bias is not is shown, a nozzle body 6 and a hydraulic Coupler 3 each coaxially arranged.
  • a Valve needle 8 which in turn the Nozzle body 6 at the downstream end from the inside by a Spray opening 12 passes through, points at her downstream end of a valve closing body 7, which with a at the discharge end of the nozzle body 6 formed valve seat surface 13 to a sealing seat interacts.
  • Actuator 2 communicates with the valve needle 8 via an actuator head 10 and an intermediate piece 9, which the upper housing part 4 in Area of the discharge end of the housing upper part. 4 engages, in operative connection.
  • first Spring element 21 biases the valve needle 6 against the Abspritzides before.
  • the first spring element 21 is here between a shoulder 40 formed in the nozzle body 6 and an upstream side thereof arranged at the Valve needle 8 fixed flange 26 clamped.
  • the Spring force of the first spring element 21 pulls the Valve-closing body 7 in which in this embodiment outwardly opening fuel injection valve 1 in the Sealing seat.
  • the hydraulic coupler 3 has a substantially first coupler section 23 and a cylindrical one second coupler section 24.
  • first coupler section 23rd a one-sided, introduced in the upper housing part 4, closed opening 41 into which the second coupler section 24 downstream influences.
  • One between the reason of Opening 41 and the opening 41 facing the end of the second portion 24 located hydraulic volume 36 is by the axial displaceability of the second coupler section 24 opposite the first coupler section 23 variable.
  • the second coupler section 24 is in the first coupler section 23, or in the opening 41, with a game 32, which is for example between 2 and 10 microns and generated by a gap 25, guided.
  • the Ratio of the minimum engagement depth of the second Section 24 to its diameter is chosen so that the second portion 24 in the opening 41 does not tilt can.
  • the actuator 2 On the upstream side of the actuator 2, the actuator 2 is above a plate-shaped, on the inflow side by a second stage 43 upwardly tapering Aktorfuß 11 with the downstream end of the second coupler section 24 in FIG Operative connection, wherein the Aktorfuß 11 and the second Coupler section 24 fixed, for example cohesively, are connected.
  • the diameter of the actuator base 11 is larger as that of the second coupler section 24, both Components are arranged coaxially with each other.
  • One in this Embodiment designed as a spiral spring second Spring element 20 rotates around the second coupler section 24 in Area of its downstream end.
  • the second Spring element 20 presses the actuator foot 11 with a bias on the actuator 2, wherein the second spring element 20th on the inflow side at a first around the opening 41 Level 42 and downstream on the second stage 43 is supported.
  • a wellrohrförmiger in this embodiment, from Steel is existing and elastic flexible section 27 disposed within the second spring element 20.
  • the inflow-side end of the flexible portion 27 is in Area of the first stage 42 hermetically sealed, for example by welding, joined.
  • the downstream end of the flexible portion 27 is in the vicinity of the Aktorfußes 11th laterally hermetically sealed at the second coupler section 24, for example, joined by welding.
  • the flexible one Section 27 closes the gap 25 and limits together with the area of the discharge end of the second Coupler section 24 a compensation chamber 14.
  • the Compensation space 14 is through the gap 25 with the hydraulic volume 36 connected.
  • a duct 15 arranged, which in this embodiment of a centered, along the longitudinal axis of the second coupler section 24 extending first bore 37, one for first bore 37 with a radial direction component extending second bore 38 and a check valve 16 exists.
  • the second bore 38 opens into the first Bore 37.
  • the Check valve 16 is arranged, which has a return from Hydraulic fluid from the hydraulic volume 36 in the Compensation space 14 prevented by the conduit 15.
  • the Check valve 16 consists of a in this Embodiment, the first bore 37 in the direction Compensation chamber 14 conically tapered cross-sectional constriction 17, one in the closed state on the Cross-sectional constriction 17 resting ball body 18 and a the ball body 18 with a bias against the Cross-sectional constriction 17 pressing third spring element 19th
  • the spherical body 18 is characterized by at the bottom of the opening 41 supporting third spring element 19 so on the Cross-sectional constriction 17 pressed that the spherical body 18th the cross-sectional constriction 17 in the closed state hermetically sealed.
  • the bias and the Spring characteristic of the third spring element 19, and the geometric dimensions of spherical body 18 and the Cross-sectional narrowing 17 can be the opening and Set closing conditions of the check valve 16.
  • the compensation space 14, the gap 25, the duct 15 and the hydraulic volume 36 completely with an oily, gas-free and filled with incompressible hydraulic fluid.
  • the flexible one Section 27 is through the selection of materials and / or by a coating diffusion-tight and acts on the Hydraulic medium by its elasticity with a pressure.
  • Fig. 2 shows a fragmentary schematic representation a second embodiment of an inventive Fuel injection valve 1 in the region of the coupler 3, similar to the embodiment of FIG. 1.
  • the Conduit 15 one the first bore 37 and the second Bore 38 connecting throttle opening 39, while the from Fig. 1 known check valve 16 is missing.
  • the throttle bore 39 can the Behavior of the coupler 3 can be influenced, the temperature-related influences are much lower than at the gap formed as an annular gap 25.
  • the gap 25 is in this, as well as in the first embodiment chosen as low as possible to the hydraulic behavior of Coupler 3 as possible exclusively via the duct 15, the throttle opening 39, and the check valve 16 to influence.
  • the actuator 2 is supported on the hydraulic volume 36.
  • the Hydraulic volume 36 is chambered as possible unloaded. Over the gap 25 can be slow, over a long time Hydraulic medium flow in and out to temperature-related Compensate for changes in length, in particular of the actuator 2, wherein at short-term actuation of the actuator 2 it by the Coupler 3 comes to an unwanted stroke loss, the must be minimized.
  • the leakage through the relatively narrow Gap 25 is strongly dependent on the viscosity of the hydraulic medium depends and these in turn strongly temperature dependent.
  • the Leakage occurs through the gap 25 in the elastic chambered compensation chamber 14, through the flexible section 27, which may for example be designed as bellows can.
  • the second spring element 20 ensures that the Hydraulic volume 36 after the end of the injection, or after corresponding temperature-induced changes in length of Components, refilled.
  • the coupler 3 is a closed system, the hydraulic volume 36 slow Temperature-related changes in length follows and at short-term load changes as little as possible, or fast refills again.
  • the invention is not limited to those shown Embodiments limited and z. B. also for internal opening fuel injectors are used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP20040104467 2003-09-17 2004-09-15 Soupape d'injection de combustible Expired - Lifetime EP1519035B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10343017 2003-09-17
DE2003143017 DE10343017A1 (de) 2003-09-17 2003-09-17 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1519035A1 true EP1519035A1 (fr) 2005-03-30
EP1519035B1 EP1519035B1 (fr) 2007-02-14

Family

ID=34177796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040104467 Expired - Lifetime EP1519035B1 (fr) 2003-09-17 2004-09-15 Soupape d'injection de combustible

Country Status (2)

Country Link
EP (1) EP1519035B1 (fr)
DE (2) DE10343017A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1591656A3 (fr) * 2004-04-26 2005-11-23 Isuzu Motors Limited Méchanisme d'absortion de l'expansion différentielle et une soupape d'injection de combustible comprenant celui-ci
EP1813805A1 (fr) * 2006-01-27 2007-08-01 Siemens VDO Automotive S.p.A. Ensemble de compensation pour un injecteur
WO2007141094A1 (fr) * 2006-06-09 2007-12-13 Robert Bosch Gmbh Dispositif d'injection de carburant pour un moteur à combustion interne
EP1887216A1 (fr) * 2006-08-02 2008-02-13 Siemens Aktiengesellschaft Arrangement thermique de compensation dans une valve d'injection
EP2141346A1 (fr) * 2008-07-03 2010-01-06 Continental Automotive GmbH Agencement de compensation thermique et soupape d'injection
WO2013135460A1 (fr) * 2012-03-16 2013-09-19 Robert Bosch Gmbh Groupe composé
JP2014202155A (ja) * 2013-04-08 2014-10-27 株式会社 Ａｃｒ コモンレール用燃料噴射ノズル

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1079099A2 (fr) * 1999-08-24 2001-02-28 Siemens Aktiengesellschaft Soupape de dosage
US20020047100A1 (en) * 2000-10-11 2002-04-25 Jack Lorraine Pressure responsive valve for a compensator in a solid state actuator
WO2003018993A1 (fr) * 2001-08-20 2003-03-06 Robert Bosch Gmbh Soupape d'injection de carburant
US20030042325A1 (en) * 2001-08-31 2003-03-06 Siemens Automotive Corporation Twin tube hydraulic compesator for a fuel injector

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19839125C1 (de) * 1998-08-27 2000-04-20 Siemens Ag Vorrichtung und Verfahren zur Dosierung von Fluid
DE19940055C1 (de) * 1999-08-24 2001-04-05 Siemens Ag Dosierventil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1079099A2 (fr) * 1999-08-24 2001-02-28 Siemens Aktiengesellschaft Soupape de dosage
US20020047100A1 (en) * 2000-10-11 2002-04-25 Jack Lorraine Pressure responsive valve for a compensator in a solid state actuator
US20020139863A1 (en) * 2000-10-11 2002-10-03 Jack Lorraine Compensator assembly having a flexible diaphragm and an internal filling tube for a fuel injector and method
WO2003018993A1 (fr) * 2001-08-20 2003-03-06 Robert Bosch Gmbh Soupape d'injection de carburant
US20030042325A1 (en) * 2001-08-31 2003-03-06 Siemens Automotive Corporation Twin tube hydraulic compesator for a fuel injector

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1591656A3 (fr) * 2004-04-26 2005-11-23 Isuzu Motors Limited Méchanisme d'absortion de l'expansion différentielle et une soupape d'injection de combustible comprenant celui-ci
US7198202B2 (en) 2004-04-26 2007-04-03 Isuzu Motors Limited Differential expansion absorption mechanism and fuel injection valve comprising same
EP1813805A1 (fr) * 2006-01-27 2007-08-01 Siemens VDO Automotive S.p.A. Ensemble de compensation pour un injecteur
WO2007141094A1 (fr) * 2006-06-09 2007-12-13 Robert Bosch Gmbh Dispositif d'injection de carburant pour un moteur à combustion interne
EP1887216A1 (fr) * 2006-08-02 2008-02-13 Siemens Aktiengesellschaft Arrangement thermique de compensation dans une valve d'injection
EP2141346A1 (fr) * 2008-07-03 2010-01-06 Continental Automotive GmbH Agencement de compensation thermique et soupape d'injection
WO2013135460A1 (fr) * 2012-03-16 2013-09-19 Robert Bosch Gmbh Groupe composé
CN104169566A (zh) * 2012-03-16 2014-11-26 罗伯特·博世有限公司 组件
JP2015517059A (ja) * 2012-03-16 2015-06-18 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ 構成アッセンブリ
US9709181B2 (en) 2012-03-16 2017-07-18 Robert Bosch Gmbh Assembly
JP2014202155A (ja) * 2013-04-08 2014-10-27 株式会社 Ａｃｒ コモンレール用燃料噴射ノズル

Also Published As

Publication number Publication date
DE10343017A1 (de) 2005-04-14
EP1519035B1 (fr) 2007-02-14
DE502004002886D1 (de) 2007-03-29

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