EP1115970B1 - Brennstoffeinspritzventil - Google Patents

Brennstoffeinspritzventil Download PDF

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Publication number
EP1115970B1
EP1115970B1 EP99923380A EP99923380A EP1115970B1 EP 1115970 B1 EP1115970 B1 EP 1115970B1 EP 99923380 A EP99923380 A EP 99923380A EP 99923380 A EP99923380 A EP 99923380A EP 1115970 B1 EP1115970 B1 EP 1115970B1
Authority
EP
European Patent Office
Prior art keywords
valve
actuator
needle
fuel injection
fuel
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.)
Expired - Lifetime
Application number
EP99923380A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1115970A1 (de
Inventor
Friedrich Boecking
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 EP1115970A1 publication Critical patent/EP1115970A1/de
Application granted granted Critical
Publication of EP1115970B1 publication Critical patent/EP1115970B1/de
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
    • F02M61/04—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
    • 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
    • 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

Definitions

  • the invention is based on a fuel injection valve according to the preamble of claim 1.
  • fuel injector forms a valve closing body together with a valve seat a sealing seat.
  • the fuel injector is alternatively either as outward opening fuel injector or as inside opening fuel injection valve formed.
  • the valve closing body is integrally connected to a valve needle, which is actuated by means of a piezoelectric actuator. Piezoelectric actuators have only a relatively small Operating stroke. Therefore, in this document proposed between the piezoelectric actuator and the Valve needle to arrange a hydraulic translation device, the actuation stroke exerted by the actuator increased.
  • a fuel injector with a piezoelectric Actuator in another design is known from DE 43 06 073 C1 known. But even this design is not very compact and requires a relatively large volume of construction.
  • fuel injection valve also provided a hydraulic translation device, around the relatively small stroke of the piezoelectric Actuator to transform to a larger stroke of the valve needle.
  • a hydraulic translation device for compression of the hydraulic medium of Translation device and to compensate for leakage losses serves a special accumulator, for example in the form of an externally provided pressure reservoir. This requires an additional connection for this Pressure reservoir or other measures for the realization of Pressure accumulator.
  • a Fuel injection valve for fuel injection systems of Internal combustion engine is known that with a piezoelectric Actuator is executed.
  • the valve has one of the actuator actuated by means of a one-piece valve needle Valve closing body, with a valve seat to a Tight fit together.
  • a Fuel line leads to the sealing seat.
  • the actor is tubular, and the valve needle extends through the tubular actuator.
  • the valve needle has an axial Llindso réelle, so that the valve needle a Section of the fuel line forms, thus at least is partially enclosed by the actuator.
  • the previously known fuel injection valves with piezoelectric Actuators are mainly used for injection fuel into a self-igniting internal combustion engine, in particular for injecting diesel fuel.
  • the case occurring operating pressures are relatively high and prevented so far a more compact, space-saving design.
  • the fuel injection valve according to the invention with the Features of claim 1 has the advantage that due to the leadership of the fuel line through the tubular shaped actuator through an extremely compact design results. While the fuel at the known fuel injection valves on the side of the actuator is passed, resulting in a wider design, or downstream of the actuator, which is for the Connection of the fuel line is usually unfavorable results from the inventive training a Centrally operated fuel line with the possibility of the Fuel inlet on the valve closing body to provide opposite end of the fuel injection valve.
  • the housing can with relatively small wall thickness be formed, since the fuel line is not like the State of the art in the housing laterally on the actuator must be passed.
  • the compact design also results in short Intake routes for the fuel, so that cavitation problems be avoided.
  • valve needle extends through the tubular actuator, wherein an axial longitudinal opening the valve needle a section of the fuel line forms.
  • the valve needle takes over both the Function of actuation of the valve closing body as well the function of the fuel line.
  • a hydraulic transmission device to be provided on which the actuator acts via a booster piston.
  • a hydraulic medium for the translation device in the fuel line it is particularly advantageous as a hydraulic medium for the translation device in the fuel line to use guided fuel.
  • a special, hydraulic Medium, such as oil, is for the Translation device then not required. Any Leakage losses are caused by an automatic Refilling process balanced. Moreover, there is not the Danger of contamination of the fuel with a different hydraulic medium, for example Hydraulic oil.
  • valve needle in two parts form and by means of a weld or a Coupling piece to connect. This way you can discharge side valve needle section spray side in the Fuel injection valve and a supply-side valve needle section inlet side into the fuel injection valve be used, the two valve needle sections then be connected together. It can be a Flange, which serves to support a return spring, pre-assembled at the inlet-side valve needle section become.
  • the actuator of a biasing element radially surround. Compared to the usual in the prior art axial arrangement of the biasing element results from this measure a more compact design.
  • Fig. 1 shows in an axial sectional view Inventive fuel injection valve 1.
  • the Fuel injector 1 is used in particular for direct Injecting fuel, especially gasoline, in a combustion chamber of a mixture-compressing, spark-ignited Internal combustion engine as so-called gasoline direct injection valve.
  • the fuel injection valve according to the invention Of course, 1 is also suitable for other applications.
  • the fuel injection valve 1 has one by means of a Valve needle 2 operable valve closing body 3.
  • the Valve needle 2 is divided into an inlet side Valve needle section 2a and a discharge-side valve needle section 2 B.
  • the valve closing body 3 is in Embodiment with the discharge-side valve needle section 2b formed in one piece. That in FIG. 1 shown fuel injection valve is an outward opening fuel injector 1.
  • the valve closing body 3 has a frustoconical, in Abspritzcardi extending section 4 on.
  • the valve closing body 3 acts with a on a first housing body 5 trained valve seat 27 to a Tight fit together.
  • the fuel flows over one in the second Housing body 6 for receiving a return spring. 9 provided chamber 8 in the tubular design inlet side valve needle section 2a.
  • the inlet side Valve needle section 2a and the discharge-side valve needle section 2b have a longitudinal opening 10, wherein the Longitudinal opening 10 over the entire axial length of the inlet-side valve needle section 2a and only partially axially in the discharge side Valve needle section 2b extends.
  • a radial bore 11 which is the longitudinal opening 10 with a recess 12 in the first housing body. 5 combines.
  • the valve needle 2 therefore forms a section one of the fuel inlet port 7 to that of the Valve closing body 3 and the valve seat surface 27 formed Sealing seat leading fuel line.
  • the fuel flows in the recess 12 of the radial bore 11 of the Valve needle 2 to that of the valve closing body 3 and the valve seat surface 27 formed sealing seat and is there hosed on actuation of the fuel injection valve 1.
  • tubular actuator 13 For actuating the fuel injection valve 1 is used according to the invention tubular actuator 13.
  • the actuator 13 encloses the inlet-side valve needle section 2a and Thus, a guided in the valve needle 2 section of Fuel line.
  • the tubular actuator 13 consists of a plurality of stacked arranged piezoelectric Ceramic plates, each provided with electrodes, to the individual ceramic plate of the actuator 13 with a to apply electrical voltage. Upon admission with an electrical voltage, the actuator 13 expands.
  • the actuator 13 abuts a first flange 14 on the second housing body 6 and acts on a second flange 15 on a booster piston 16 a.
  • the inlet side valve needle section 2a and the discharge-side valve needle section 2b are in Embodiment by a weld 17 with each other connected. So that the weld 17 during assembly for a Welding tool is accessible, has the booster piston 16 several circumferentially distributed radial bores 18 on.
  • the actuator 13 is radially by a biasing element 19th surrounded, in the embodiment as a corrugated Switzerlandfederband is formed.
  • the biasing element 19 is between the first flange 14 and the second flange 15 clamped and generates an axial preload for the Actuator 13.
  • the Translation device 20 consists of one with a hydraulic medium filled translator chamber 21, to which of the booster piston 16 with a first surface A1 and the valve needle 2 with a second surface A2 adjacent.
  • the second surface A2 of the valve needle 2 is smaller than the first surface A1 of the booster piston 16.
  • the fuel injection valve 1 records characterized by an extremely compact design.
  • the leadership the fuel line takes place in the region of the actuator 13 concentric with the longitudinal axis 24 through the tubular trained actuator 13 through. It is not required, in the housing bodies 5 and 6, as in the state the technique usual to integrate the fuel line, so that overall a slimmer and more compact design results.
  • the fuel injectors for direct Injecting fuel into the combustion chamber of a mixture-compression, spark-ignited internal combustion engine in particular so-called gasoline direct injection valves, occurring fuel pressures lower than fuel injectors for self-igniting internal combustion engines, For example, diesel injection valves.
  • the required operating force comparatively lower so that the of the tubular actuator 13th exerted actuation force at least for this preferred Use case is completely sufficient.
  • Fig. 2 shows in a longitudinal section a second Embodiment of a fuel injection valve according to the invention 1.
  • Embodiment is in contrast to the in Fig. 1 illustrated embodiment to an inward opening fuel injection valve 1.
  • Already described Elements are provided with matching reference numerals, to facilitate the assignment. On a repetitive Description is omitted in this respect.
  • valve needle is the second in two parts from an inlet-side valve needle section 2a and a discharge-side valve needle portion 2b.
  • the valve closing body 3 has a cylindrical Section 40 on which to the better circumferential distribution of the fuel at least one Swirl groove 41 is provided.
  • the cylindrical Section 40 joins in the flow direction tapered portion 42 of the valve closing body 3, the one formed on a nozzle body 43 Valve seat surface 27 cooperates to a sealing seat.
  • Actuation of the fuel injection valve 1 lifts the Valve closing body 3 of the valve seat surface 27 in Fig. 2nd upwards and releases a spray opening 45.
  • Of the Nozzle body 43 is by means of a clamping nut 46, which over a thread 47 is screwed to the housing body 6, braced against an intermediate disc 48.
  • valve needle 2 has a Longitudinal opening 10, which is a section of the Fuel line forms. About radial bores 60 flows the Fuel in a recess 51 of the nozzle body 43 and on the at least one swirl groove 41 on to the Sealing seat.
  • the actuator 13 is tubular and formed by a Biasing element 19 between a first flange 14 and clamped a second flange 15.
  • a Biasing element 19 When applying the Actuator 13 with an electric voltage expands this and shifts a booster piston 16 in FIG. 2 up towards the fuel inlet port 7.
  • the hydraulic medium in a booster chamber 21 of a hydraulic translator 20 is therefore displaced and moves the flange 23 and thus the valve needle 2 in Fig. 2 upward, so that the valve closing body 3 of the Valve seat surface 27 lifts and the spray opening 45th releases.
  • FIG. 3 shows the detail III in Fig. 2.
  • the upstream side Valve needle section 2a an axial longitudinal opening 10, the via radial bores 60 opens.
  • the each in the adjoining area between the two Valve needle sections 2a and 2b are formed to a to ensure better radial distribution of the fuel.
  • the coupling piece 52 are radial bores 54 passed through, so that the fuel ultimately in the Recess 51 of the nozzle body 43 passes.
  • the inlet-side valve needle section 2a has a first one Groove 55, while the discharge-side valve needle section 2b has a second groove 56, each at the outer Scope are provided.
  • the coupling piece 52 has inwards projecting detents 57 and 58 which in the grooves 55 and 56 engage with rest.
  • the invention is not limited to the illustrated embodiments limited.
  • the concept of central leadership of Fuel line through the tubular actuator 13 through is structurally different even in a variety designed fuel injectors realized.
  • the piezoelectric actuator 13 may also be magnetostrictive actuator can be 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)
EP99923380A 1998-09-23 1999-03-23 Brennstoffeinspritzventil Expired - Lifetime EP1115970B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19843570 1998-09-23
DE19843570A DE19843570A1 (de) 1998-09-23 1998-09-23 Brennstoffeinspritzventil
PCT/DE1999/000839 WO2000017507A1 (de) 1998-09-23 1999-03-23 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1115970A1 EP1115970A1 (de) 2001-07-18
EP1115970B1 true EP1115970B1 (de) 2005-02-23

Family

ID=7881932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99923380A Expired - Lifetime EP1115970B1 (de) 1998-09-23 1999-03-23 Brennstoffeinspritzventil

Country Status (7)

Country Link
US (1) US6585171B1 (ko)
EP (1) EP1115970B1 (ko)
JP (1) JP2002525485A (ko)
KR (1) KR20010075280A (ko)
DE (2) DE19843570A1 (ko)
ES (1) ES2237916T3 (ko)
WO (1) WO2000017507A1 (ko)

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DE10152419A1 (de) * 2001-10-24 2003-06-18 Bosch Gmbh Robert Brennstoffeinspritzventil
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US8561598B2 (en) 2008-01-07 2013-10-22 Mcalister Technologies, Llc Method and system of thermochemical regeneration to provide oxygenated fuel, for example, with fuel-cooled fuel injectors
US8365700B2 (en) 2008-01-07 2013-02-05 Mcalister Technologies, Llc Shaping a fuel charge in a combustion chamber with multiple drivers and/or ionization control
US8387599B2 (en) 2008-01-07 2013-03-05 Mcalister Technologies, Llc Methods and systems for reducing the formation of oxides of nitrogen during combustion in engines
US8074625B2 (en) 2008-01-07 2011-12-13 Mcalister Technologies, Llc Fuel injector actuator assemblies and associated methods of use and manufacture
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US8413634B2 (en) 2008-01-07 2013-04-09 Mcalister Technologies, Llc Integrated fuel injector igniters with conductive cable assemblies
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KR20120086375A (ko) 2009-12-07 2012-08-02 맥알리스터 테크놀로지즈 엘엘씨 연료 인젝터 및 점화기를 위한 적응 제어 시스템
WO2011100717A2 (en) 2010-02-13 2011-08-18 Mcalister Roy E Methods and systems for adaptively cooling combustion chambers in engines
KR101245398B1 (ko) 2010-02-13 2013-03-19 맥알리스터 테크놀로지즈 엘엘씨 음파 변경기를 갖는 연료 분사기 조립체 및 관련 사용 및 제조 방법
US20110297753A1 (en) 2010-12-06 2011-12-08 Mcalister Roy E Integrated fuel injector igniters configured to inject multiple fuels and/or coolants and associated methods of use and manufacture
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US8820275B2 (en) 2011-02-14 2014-09-02 Mcalister Technologies, Llc Torque multiplier engines
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CN103890343B (zh) 2011-08-12 2015-07-15 麦卡利斯特技术有限责任公司 用于改进的发动机冷却及能量产生的系统和方法
US20130068200A1 (en) * 2011-09-15 2013-03-21 Paul Reynolds Injector Valve with Miniscule Actuator Displacement
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US9803555B2 (en) * 2014-04-23 2017-10-31 General Electric Company Fuel delivery system with moveably attached fuel tube
CN104806400B (zh) * 2015-04-09 2018-01-05 中国第一汽车股份有限公司无锡油泵油嘴研究所 一种燃料喷射器
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Also Published As

Publication number Publication date
WO2000017507A1 (de) 2000-03-30
DE19843570A1 (de) 2000-03-30
EP1115970A1 (de) 2001-07-18
ES2237916T3 (es) 2005-08-01
JP2002525485A (ja) 2002-08-13
US6585171B1 (en) 2003-07-01
DE59911662D1 (de) 2005-03-31
KR20010075280A (ko) 2001-08-09

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