JP2008531927A - Fuel injector for internal combustion engines - Google Patents

Fuel injector for internal combustion engines Download PDF

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JP2008531927A
JP2008531927A JP2008500684A JP2008500684A JP2008531927A JP 2008531927 A JP2008531927 A JP 2008531927A JP 2008500684 A JP2008500684 A JP 2008500684A JP 2008500684 A JP2008500684 A JP 2008500684A JP 2008531927 A JP2008531927 A JP 2008531927A
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valve seat
fuel injector
sealing member
longitudinal axis
fuel
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ヴィッチ、ゲータン
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シーメンス ヴィディーオー オートモティヴ コーポレイション
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Priority claimed from US11/072,459 external-priority patent/US7334746B2/en
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    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • 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
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1826—Discharge orifices having different sizes
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1853—Orifice plates
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
    • 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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector

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

Abstract

ハウジングと、弁座部分及びガイド部分を備える連続壁を形成する均一化部材と、密閉部材と、調量ディスクを含む、内燃機関用燃料噴射器に関する。ハウジングは、縦軸に沿って配置された入口と出口を含み、均一化部材は、出口に近接して配置されている。弁座部分は、密封面と弁座オリフィスを含んでいる。密閉部材は、ハウジング内に配置され、密閉部材が弁座から移動して、燃料流が密閉部材を通過できるようにする第１の位置と、密閉部材が弁座と接触して、燃料流が密閉部材を通過できないようにする第２の位置との間で、縦軸に沿って往復運動を行えるようにガイド部分により位置決めされる。調量ディスクは、弁座オリフィスに近接している。  The present invention relates to a fuel injector for an internal combustion engine including a housing, a uniformizing member forming a continuous wall including a valve seat portion and a guide portion, a sealing member, and a metering disk. The housing includes an inlet and an outlet disposed along the longitudinal axis, and the homogenizing member is disposed proximate to the outlet. The valve seat portion includes a sealing surface and a valve seat orifice. The sealing member is disposed within the housing, wherein the sealing member moves from the valve seat so that the fuel flow can pass through the sealing member; the sealing member contacts the valve seat; It is positioned by the guide portion so as to be able to reciprocate along the longitudinal axis between the second position which prevents passage through the sealing member. The metering disc is close to the valve seat orifice.

Description

同時係属出願の相互参照
本出願は、本明細書にそっくりそのまま援用している、２００４年３月８日付けの出願に係る米国仮出願第６０／５５１，３０４号の先の提出日の特典を主張するものである。 CROSS-REFERENCE OF CO-PENDING APPLICATIONS This application is a benefit of the earlier filing date of US Provisional Application No. 60 / 551,304, filed March 8, 2004, which is hereby incorporated by reference in its entirety. It is what I insist.

本発明は、一般に内燃機関用の燃料噴射器に関し、特に燃料の霧化及び正確な照準に修正を加えて、様々なエンジン構成の特定の要件を満たし得る燃料噴射器に関する。   The present invention relates generally to fuel injectors for internal combustion engines, and more particularly to fuel injectors that can be modified to meet specific requirements of various engine configurations with modifications to fuel atomization and precise aiming.

最新の自動車用燃料装置は、燃料噴射器を利用して、内燃機関の各燃焼室に送り込む燃料の正確な調量を行う。燃料噴射器は、噴射中に燃料を霧化し、燃料を多数の極小微粒子に分解し、噴射される燃料の表面積を拡大し、燃焼前に、一般には、周囲空気である酸化剤と燃料との完全な混合を可能にする。燃料の調量及び霧化によって、燃焼排出物が減少し、エンジンの燃料効率が向上する。従って、概して、燃料の調量及び照準の精度が高くなる程、また、燃料の霧化が増す程排出物が減少し、燃料効率が良くなる。   The latest automotive fuel systems use fuel injectors to accurately meter the fuel delivered to each combustion chamber of an internal combustion engine. A fuel injector atomizes the fuel during injection, breaks the fuel into a number of tiny particles, enlarges the surface area of the injected fuel, and before combustion, typically between the oxidant and fuel, which is ambient air. Allows complete mixing. Fuel metering and atomization reduce combustion emissions and improve engine fuel efficiency. Therefore, in general, the higher the fuel metering and aiming accuracy, and the greater the fuel atomization, the lower the emissions and the better the fuel efficiency.

燃料噴射器は、一般に、シリンダヘッドに近接した吸気マニホルドにおける吸気弁の上流に取り付けられる。吸気弁がシリンダの吸気ポートで開くと、燃料が、吸気ポートに向かって噴霧される。ある状況では、吸気弁のヘッド又はステムを燃料噴霧の標的とするのが望ましいが、別の状況では、吸気弁ではなく、吸気ポートを燃料噴霧の標的とするのが望ましい場合もある。両方の場合とも、燃料噴霧の照準が、噴霧パターンによって影響を受ける可能性がある。噴霧パターンが、広く発散する円錐形状を持つ場合、噴霧燃料は、その対象とする標的に向かわず、吸気ポートの表面にぶつかる可能性がある。逆に、噴霧パターンが、狭く発散する円錐形状を備える場合、燃料が霧化せず、再結合して、液流になる可能性さえある。何れの場合にも、不完全燃焼が生じ、望ましくない排気物質を増加させることになり得る。   The fuel injector is generally mounted upstream of the intake valve in the intake manifold proximate to the cylinder head. When the intake valve opens at the intake port of the cylinder, fuel is sprayed toward the intake port. In some situations, it may be desirable to target the fuel spray to the intake valve head or stem, while in other situations it may be desirable to target the fuel spray to the intake port rather than the intake valve. In both cases, the aim of the fuel spray can be affected by the spray pattern. If the spray pattern has a widely diverging conical shape, the atomized fuel may not be directed to its intended target and hit the surface of the intake port. Conversely, if the spray pattern comprises a narrowly diverging conical shape, the fuel will not atomize and may recombine into a liquid flow. In either case, incomplete combustion can occur, leading to an increase in undesirable exhaust emissions.

照準及び噴霧パターンに関する要件を複雑にするのは、様々なエンジン設計に固有のシリンダヘッド構成及び吸気部の幾何学形状である。結果として、燃料噴霧の特定の円錐パターン及び照準に合わせて設計された燃料噴射器は、あるタイプのエンジン構成では極めてうまく機能するが、異なるタイプのエンジン構成では、搭載に際し排出物の問題を生じる可能性がある。   Complicating the requirements for aiming and spray patterns are the cylinder head configuration and intake geometry inherent in various engine designs. As a result, fuel injectors designed for a particular cone pattern and aim of fuel spray work very well with certain types of engine configurations, but with different types of engine configurations, there are emissions issues when installed there is a possibility.

電磁燃料噴射器は、一般に、ソレノイドアセンブリを利用して、燃料調量アセンブリに作動力を供給する。一般に、燃料調量アセンブリは、密閉部材が弁座に納まって、燃料が調量オリフィスを介して燃焼室に漏入するのを阻止する閉位置と、密閉部材が弁座から持ち上げられて、調量オリフィスを介して燃料を放出し、燃焼室内に送り込むことが可能になる開位置との間で往復運動するプランジャ型密閉部材である。開位置と閉位置との間の往復運動時、密閉部材は、弁座との適正な接触を容易にする下降ガイド部材によって位置決めされる。既知の燃料噴射器の場合、下降ガイド部材と弁座は、燃料噴射器の組立て中に適正な位置決めを要する２つの個別部品である。２つの部品の相互位置が狂うと、燃料噴射器の漏れを生じ、燃料の正確な調量及び照準に悪影響を及ぼす可能性がある。こうした位置決めのミスを防ぐため、下降ガイド部材と弁座は、１つの均一な部材として形成されてきた。しかし、既知の均一な下降ガイド及び弁座部材の場合、燃料の霧化及び正確な照準を修正して、様々なエンジン構成の特定要件を満たすことはできない。   An electromagnetic fuel injector typically utilizes a solenoid assembly to provide actuation force to the fuel metering assembly. In general, the fuel metering assembly has a closed position in which the sealing member is contained in the valve seat and prevents fuel from leaking into the combustion chamber via the metering orifice, and the sealing member is lifted from the valve seat to adjust the fuel metering assembly. A plunger-type sealing member that reciprocates between an open position where fuel can be discharged through a quantity orifice and fed into the combustion chamber. During reciprocation between the open and closed positions, the sealing member is positioned by a lowering guide member that facilitates proper contact with the valve seat. In the known fuel injector, the lowering guide member and the valve seat are two separate parts that require proper positioning during assembly of the fuel injector. A misalignment of the two parts can cause fuel injector leakage and adversely affect the precise metering and aiming of the fuel. In order to prevent such positioning errors, the lowering guide member and the valve seat have been formed as one uniform member. However, with known uniform lowering guides and valve seat members, fuel atomization and precise aiming cannot be modified to meet the specific requirements of various engine configurations.

正確に位置決めした下降ガイド部材と弁座部材を備え、燃料の霧化と正確な照準を修正して、様々なエンジン構成の特定要件を満たし得る燃料噴射器を提供することにある。   It is an object of the present invention to provide a fuel injector that includes precisely positioned lowering guide members and valve seat members that can correct fuel atomization and precise aiming to meet the specific requirements of various engine configurations.

望ましい実施形態の１つでは、ハウジングと、弁座部分及びガイド部分を備えた連続壁を形成する均一な部材と、密閉部材と、調量ディスクとを含む、内燃機関用の燃料噴射器を提供する。ハウジングは、縦軸に沿って配置された入口と出口を含む。均一化部材は出口に近接して配置する。弁座部分は、密封面と弁座オリフィスを含む。密閉部材をハウジング内に配置し、密閉部材が弁座から移動して、燃料流が密閉部材を通過できるようにする第１の位置と、密閉部材が弁座と接触して、燃料流が密閉部材を通過できないようにする第２の位置との間で、縦軸に沿って往復運動を行えるようにガイド部分によって位置決めする。調量ディスクは弁座オリフィスに近接して設ける。   In one preferred embodiment, a fuel injector for an internal combustion engine is provided that includes a housing, a uniform member forming a continuous wall with a valve seat portion and a guide portion, a sealing member, and a metering disk. To do. The housing includes an inlet and an outlet disposed along the longitudinal axis. The homogenizing member is placed close to the outlet. The valve seat portion includes a sealing surface and a valve seat orifice. A sealing member is disposed in the housing, the sealing member moves from the valve seat, a first position that allows the fuel flow to pass through the sealing member, and the sealing member contacts the valve seat to seal the fuel flow. Positioning is performed by the guide portion so as to allow reciprocation along the longitudinal axis between the second position where the member cannot pass. The metering disc is provided close to the valve seat orifice.

もう１つの望ましい実施形態は、内燃機関用の燃料噴射器の製造方法を提供する。燃料噴射器は、縦軸に沿って入口と出口が配置されたハウジングと、ハウジング内に配置された密閉部材を含む。この方法は、出口に近接して配置され、弁座部分とガイド部分を備える連続壁を形成する均一化部材を設ける工程を含む。弁座部分は、密封面と弁座オリフィスを含む。密閉部材は、ガイド部材によって位置決めされ、弁座部分と接触する。この方法は、弁座オリフィスに近接して、内燃機関に対する特有の噴霧パターンを形成するように構成した複数の調量オリフィスを持つ調量ディスクを設ける工程を含む。   Another desirable embodiment provides a method of manufacturing a fuel injector for an internal combustion engine. The fuel injector includes a housing having an inlet and an outlet disposed along a longitudinal axis, and a sealing member disposed in the housing. The method includes the step of providing a homogenizing member disposed proximate to the outlet and forming a continuous wall comprising a valve seat portion and a guide portion. The valve seat portion includes a sealing surface and a valve seat orifice. The sealing member is positioned by the guide member and contacts the valve seat portion. The method includes providing a metering disk having a plurality of metering orifices configured to form a unique spray pattern for an internal combustion engine proximate to the valve seat orifice.

本明細書に組み込まれ、本明細書の一部を構成する添付図面は、本発明の望ましい実施形態を例示しており、上述の概略説明及び後述の詳細な説明と共に、本発明の特徴を明らかにする働きをする。   The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate preferred embodiments of the invention, and together with the general description given above and the detailed description given below, characterize the invention. To work.

図１は、弁座下降ガイド結合体１１０を備えた燃料噴射器の望ましい実施形態の１つを例示する。図２は、燃料噴射器の出口に固定された弁座下降ガイド結合体１１０の拡大図である。燃料噴射器は、燃料入口管５０、ステータ５２、非磁性外被５４、弁本体５６、調量ディスク１１２、調整管５８、フィルタ組立て体６０、コイルばね６２、アーマチュア６４、密閉部材６６、オーバモールド６８、コイル組立て体７０及びコイル組立て体ハウジング７２を含んでいる。   FIG. 1 illustrates one preferred embodiment of a fuel injector with a valve seat lowering guide assembly 110. FIG. 2 is an enlarged view of the valve seat lowering guide assembly 110 fixed to the outlet of the fuel injector. The fuel injector includes a fuel inlet pipe 50, a stator 52, a nonmagnetic jacket 54, a valve body 56, a metering disk 112, a regulating pipe 58, a filter assembly 60, a coil spring 62, an armature 64, a sealing member 66, an overmold. 68, a coil assembly 70 and a coil assembly housing 72.

燃料入口管５０、ステータ５２、非磁性外被５４及び弁本体５６は、できれば、ハーメチックレーザ溶接部によって接合されて、燃料噴射器入口と燃料噴射器出口の間に流体密封流路を形成する。弁座下降ガイド１１０は、圧着、溶接、接着又はリベット締めのような適合する結合技法によって、弁本体５６の出口端に結合される。   The fuel inlet tube 50, the stator 52, the non-magnetic jacket 54 and the valve body 56 are preferably joined by a hermetic laser weld to form a fluid tight flow path between the fuel injector inlet and the fuel injector outlet. The valve seat lowering guide 110 is coupled to the outlet end of the valve body 56 by a suitable coupling technique such as crimping, welding, gluing or riveting.

較正された燃料噴射器では、調整管５８は、アーマチュア６４及び密閉部材６６を押しやって、密閉部材６６の丸い先端が弁座下降ガイド１１０の弁座部分１１４に納まり、オリフィス１１８を閉じ得る所望のバイアス力になる迄コイルばね６２を圧縮すべく、ステータ５２内の縦軸Ａ−Ａに沿って配置される。フィルタ組立て体６０は、燃料噴射器を通る燃料から粒状物質を濾過するため、調整管５８の開放上端に近接して取り付け得る。   In a calibrated fuel injector, the adjustment tube 58 pushes the armature 64 and the sealing member 66 so that the rounded tip of the sealing member 66 fits into the valve seat portion 114 of the valve seat lowering guide 110 and closes the orifice 118. The coil spring 62 is arranged along the longitudinal axis A-A in the stator 52 to compress the coil spring 62 until a bias force is reached. Filter assembly 60 may be mounted proximate the open top end of conditioning tube 58 to filter particulate matter from the fuel passing through the fuel injector.

調整管５８の通過後、燃料は、調整管５８、ステータ５２及びアーマチュア６４によって形成され、コイルばね６２を含む空間７３内に流入する。アーマチュア６４は、弁本体５６内の通路７５と空間７３をつなぐ通路７４を含む。従って、燃料は、空間７３から、通路７４、７５、更に弁座下降ガイド１１０の通路１２０を通り、深絞り弁座下降ガイド１１０の弁座部分１１４迄流れる。   After passing through the adjusting pipe 58, the fuel is formed by the adjusting pipe 58, the stator 52 and the armature 64, and flows into the space 73 including the coil spring 62. The armature 64 includes a passage 74 that connects the passage 75 and the space 73 in the valve body 56. Therefore, the fuel flows from the space 73 through the passages 74 and 75 and the passage 120 of the valve seat lowering guide 110 to the valve seat portion 114 of the deep throttle valve seat lowering guide 110.

コイル組立て体７０は、電磁コイル７８が巻かれたプラスチック製ボビン７６を含む。コイル７８の各末端は、成形されて、オーバモールド６８の一体化部分として形成された周囲８２と共に、燃料噴射器を操作する電子制御回路（不図示）に燃料噴射器を接続するための電気コネクタを形成する各端子８０に接続されている。   The coil assembly 70 includes a plastic bobbin 76 around which an electromagnetic coil 78 is wound. Each end of the coil 78 is molded and, together with a perimeter 82 formed as an integral part of the overmold 68, an electrical connector for connecting the fuel injector to an electronic control circuit (not shown) that operates the fuel injector. Are connected to the respective terminals 80 forming.

動作時、燃料噴射器は、当初、図１に示す非噴射位置にある。この位置で、ステータ５２の環状端面とアーマチュア６４の直面する環状端面との間に有効空隙８４が存在する。電磁コイル７８に通電すると、非磁性外被５４によって、磁束が確実にアーマチュア６４を含む経路を辿る。磁気回路は、ハウジング７２の軸方向の下端から始まり、弁本体５６を通ってアーマチュア６４迄延び、アーマチュア６４から有効空隙８４を横切ってステータ５２に達し、ハウジング７２に戻る。電磁コイル７８に通電すると、アーマチュア６４にかかるばね力が負けて、アーマチュア６４がステータ５２に引き寄せられ、有効空隙８４が縮小する。この結果、密閉部材６６が弁座部分１１４から離れ、燃料噴射器が開き、弁本体５６の加圧燃料が、弁座下降ガイド１１０の通路１２０を通り、オリフィス１１８を通って、チャンバ１２６に流入し、調量ディスク１１２にパターン化されたオリフィス１２８を通る。コイル７８の通電を停止すると、コイルばね６２によって、アーマチュア／密閉部材が押され、弁座部分１１４が閉じた状態になる。   In operation, the fuel injector is initially in the non-injection position shown in FIG. In this position, an effective air gap 84 exists between the annular end surface of the stator 52 and the annular end surface facing the armature 64. When the electromagnetic coil 78 is energized, the magnetic flux surely follows the path including the armature 64 by the nonmagnetic jacket 54. The magnetic circuit begins at the axial lower end of the housing 72, extends through the valve body 56 to the armature 64, crosses the effective air gap 84 from the armature 64, reaches the stator 52, and returns to the housing 72. When the electromagnetic coil 78 is energized, the spring force applied to the armature 64 is lost, the armature 64 is attracted to the stator 52, and the effective air gap 84 is reduced. As a result, the sealing member 66 is separated from the valve seat portion 114, the fuel injector is opened, and the pressurized fuel in the valve body 56 flows into the chamber 126 through the passage 120 of the valve seat lowering guide 110, through the orifice 118. Through the orifice 128 patterned on the metering disc 112. When the energization of the coil 78 is stopped, the armature / sealing member is pushed by the coil spring 62 and the valve seat portion 114 is closed.

図３は、弁座下降ガイド結合体１１０の望ましい実施形態の１つを例示する。図４は、弁座下降ガイド結合体１１０の部分断面図である。この望ましい実施形態の場合、弁座下降ガイド結合体１１０は、連続壁として形成した均一化部材である。連続壁は、深絞り製造工程で金属から形成するのが望ましい。しかし、弁座下降ガイド結合体１１０の弁座部分１１４とガイド部分１１６との互いに適正な位置決めが可能なら、連続壁は、他の材料及び他の方法で形成することもできる。ガイド部分１１６によって、縦軸Ａ−Ａに沿って配置されたシリンダが形成される。弁座部分１１４は、縦軸Ａ−Ａに沿って配置された円錐台を形成し、その底面はガイド部分１１６の一方の端部と一体に形成され、その頂部はオリフィス１１８をなす。縦軸Ａ−Ａ周りに等間隔をあけて放射状に配置した通路１２０が、ガイド部分と弁座部分の中間の壁部分で、弁座下降ガイド結合体を貫通している。図２に例示のように、ガイド部分１１６によって、密閉部材６６が弁座部分１１４上において適正に位置決めされ、密閉部材６６と弁座部分１１４との間の流体密封シールが形成される。均一化部材として形成したガイド部分１１６及び弁座部分１１４によって、それらの部分が、燃料噴射器の組立て中に互いの位置合わせが必要になる個別部品であれば生じる可能性のある、これら部分間の位置合わせの誤差を排除する。   FIG. 3 illustrates one preferred embodiment of the valve seat lowering guide combination 110. FIG. 4 is a partial cross-sectional view of the valve seat lowering guide combined body 110. In this preferred embodiment, the valve seat lowering guide assembly 110 is a homogenizing member formed as a continuous wall. The continuous wall is preferably formed from metal in a deep drawing manufacturing process. However, the continuous wall may be formed of other materials and in other ways, as long as the valve seat portion 114 and the guide portion 116 of the valve seat lowering guide assembly 110 can be properly positioned. The guide portion 116 forms a cylinder arranged along the longitudinal axis AA. The valve seat portion 114 forms a truncated cone disposed along the longitudinal axis AA, the bottom surface thereof is formed integrally with one end of the guide portion 116, and the top portion forms an orifice 118. The passages 120 arranged radially at equal intervals around the longitudinal axis A-A penetrate the valve seat lowering guide coupling body at the intermediate wall portion between the guide portion and the valve seat portion. As illustrated in FIG. 2, the guide portion 116 properly positions the sealing member 66 on the valve seat portion 114 and forms a fluid tight seal between the sealing member 66 and the valve seat portion 114. The guide portion 116 and the valve seat portion 114 formed as a homogenizing member cause these portions to occur if they are separate parts that need to be aligned with each other during assembly of the fuel injector. Eliminating alignment errors.

この望ましい実施形態では、弁座下降ガイド結合体１１０の連続壁に、更に両方共、ガイド部分及び弁座部分と一体に形成した調量ディスク支持部分１２２及び保持部分１２４を設け得る。保持部分１２４により、図２に例示の如く、燃料噴射器の出口に近接した弁本体５６の外面との流体密封接合部を形成できる。部分１２２により、弁座部分１１４の頂部と保持部分１２４の間に延びる環状部を形成し、調量ディスク１１２を支持し得る。図２及び図４に示す如く、部分１２２は、縦軸Ａ−Ａから斜角をなして放射状に外側に延び、調量ディスク１１２と共にチャンバ１２６を形成する。調量ディスク１１２は、燃料噴射器からの燃料放出を可能にする複数のオリフィス１２８を含む。燃料の霧化と正確な照準を修正し、様々なエンジン構成の特定要件を満たし得るように、様々な寸法、形状、数及びパターンのオリフィス１２８を備えた様々な調量ディスク１１２を調量ディスク支持部分１２２に固定することができる。例えば弁座下降ガイド１１０は、参考迄に本明細書においてそっくりそのまま援用する、２００２年６月２８日に提出した出願第１０／１８３，４０６号、２００２年６月２８日に提出した出願第１０／１８３，３９２号、２００４年１月９日に提出した出願第１０／７５３，３７８号、２００４年１月９日に提出した出願第１０／７５３，４８１号、及び、２００４年１月９日に提出した出願第１０／７５３，３７７号に開示の燃料噴射器／調量ディスク構成に利用できる。   In this preferred embodiment, the continuous wall of the valve seat lowering guide assembly 110 may further be provided with a metering disc support portion 122 and a holding portion 124 that are both formed integrally with the guide portion and the valve seat portion. The retaining portion 124 can form a fluid-tight joint with the outer surface of the valve body 56 proximate the fuel injector outlet, as illustrated in FIG. Portion 122 may form an annulus extending between the top of valve seat portion 114 and retaining portion 124 to support metering disc 112. As shown in FIGS. 2 and 4, the portion 122 extends radially outward at an oblique angle from the longitudinal axis AA and forms a chamber 126 with the metering disc 112. The metering disc 112 includes a plurality of orifices 128 that allow fuel discharge from the fuel injector. Various metering discs 112 with various sizes, shapes, numbers and patterns of orifices 128 can be adjusted to modify fuel atomization and precise aiming to meet the specific requirements of various engine configurations It can be fixed to the support portion 122. For example, the valve seat lowering guide 110 is incorporated by reference in its entirety herein for reference, application 10 / 183,406 filed Jun. 28, 2002, application No. 10 filed Jun. 28, 2002. Application No. 10 / 753,378, filed Jan. 9, 2004, application No. 10 / 753,481, filed Jan. 9, 2004, and January 9, 2004. Can be used in the fuel injector / metering disc configuration disclosed in application Ser. No. 10 / 753,377.

幾つかの望ましい実施形態に関連して、本発明を開示してきたが、付属の請求項及びその同等物に規定の本発明の領域及び範囲を逸脱することなく、解説の実施形態に対して多様な修正、改変、及び、変更を加えることが可能である。従って、本発明は、前記の実施形態に制限されるものではなく、付属の請求項の言語によって規定する全範囲を含むように意図されたものである。   Although the invention has been disclosed in connection with some preferred embodiments, it will be appreciated that various changes may be made to the described embodiments without departing from the scope and scope of the invention as defined in the appended claims and their equivalents. Various modifications, alterations, and changes can be made. Accordingly, the present invention is not intended to be limited to the above-described embodiments, but is intended to include the full scope defined by the language of the appended claims.

本発明の実施形態の１つによる弁座下降ガイド結合体を含む燃料噴射器の断面図である。1 is a cross-sectional view of a fuel injector including a valve seat lowering guide assembly according to one embodiment of the present invention. 図１の弁座下降ガイド結合体の拡大図である。It is an enlarged view of the valve seat lowering guide coupling body of FIG. 本発明の実施形態の１つによる弁座下降ガイド結合体の透視図である。FIG. 6 is a perspective view of a valve seat lowering guide combination according to one embodiment of the present invention. 図３の弁座下降ガイド結合体の部分断面図である。It is a fragmentary sectional view of the valve-seat lowering guide coupling body of FIG.

符号の説明Explanation of symbols

５０ 燃料入口管、５２ ステータ、５４ 非磁性外被、５６ 弁本体、５８ 調整器、６０ フィルタ組立て体、６２ コイルばね、６４ アーマチュア、６６ 密閉部材、６８ オーバモールド、７０ コイル組立て体、７２ コイル組立て体・ハウジング、７３ 空間、７４ 通路、７５ 通路、７６ プラスチック製ボビン、７８ 電磁コイル、８０ 端子、８２ 周囲、１１０ 弁座下降ガイド結合体、１１２ 調量ディスク、１１４ 弁座部分、１２０ 通路、１２２ 調量ディスク支持部分、１２４ 保持部分、１２６ チャンバ、１２８ オリフィス 50 Fuel inlet pipe, 52 Stator, 54 Non-magnetic sheath, 56 Valve body, 58 Regulator, 60 Filter assembly, 62 Coil spring, 64 Armature, 66 Sealing member, 68 Overmold, 70 Coil assembly, 72 Coil assembly Body / housing, 73 space, 74 passage, 75 passage, 76 plastic bobbin, 78 electromagnetic coil, 80 terminal, 82 circumference, 110 valve seat lowering guide assembly, 112 metering disc, 114 valve seat portion, 120 passage, 122 Metering disc support part, 124 holding part, 126 chamber, 128 orifice

Claims (11)

内燃機関用の燃料噴射器であって、
縦軸に沿って入口と出口が配置されたハウジングと、
前記出口に近接して配置され、密封面及び弁座オリフィスを含む弁座部分と、ガイド部分を備えた連続壁を形成する均一化部材と、
前記ハウジング内にある密閉部材と、
前記弁座オリフィスに近接した調量ディスクとを含み、
前記密閉部材が前記弁座から移動して、燃料流が前記密閉部材を通過できるようにする第１の位置と、前記密閉部材が前記弁座と接触して、燃料流が前記密閉部材を通過できないようにする第２の位置との間で、前記縦軸に沿って往復運動を行えるように前記ガイド部分によって位置決めされる
ことを特徴とする燃料噴射器。 A fuel injector for an internal combustion engine,
A housing with an inlet and an outlet disposed along the longitudinal axis;
A valve seat portion disposed proximate to the outlet and including a sealing surface and a valve seat orifice; and a homogenizing member forming a continuous wall with a guide portion;
A sealing member in the housing;
A metering disc proximate to the valve seat orifice,
A first position that allows the sealing member to move from the valve seat to allow fuel flow through the sealing member; and the sealing member contacts the valve seat so that the fuel flow passes through the sealing member. The fuel injector is positioned by the guide portion so as to be able to reciprocate along the longitudinal axis with respect to a second position to be disabled. 前記連続壁に、前記弁座部分と一体形成された支持部分が含まれ、前記調量ディスクが前記支持部分に固定されたことを特徴とする請求項１記載の燃料噴射器。   The fuel injector according to claim 1, wherein the continuous wall includes a support portion integrally formed with the valve seat portion, and the metering disk is fixed to the support portion. 前記連続壁に、前記支持部分と一体に形成された保持部分が含まれ、前記保持部分が前記ハウジングの出口に固定されたことを特徴とする請求項２記載の燃料噴射器。   The fuel injector according to claim 2, wherein the continuous wall includes a holding portion formed integrally with the support portion, and the holding portion is fixed to an outlet of the housing. 前記ガイド部分が、前記縦軸に沿って配置されたシリンダを形成し、
前記弁座部分が、前記縦軸に沿って配置された円錐台を形成し、
前記円錐台が、底面と頂部を備えており、前記底面が、前記シリンダの一方の端部と一体に形成され、前記頂部が前記弁座オリフィスを形成する
ことを特徴とする請求項１記載の燃料噴射器。 The guide portion forms a cylinder disposed along the longitudinal axis;
The valve seat portion forms a truncated cone disposed along the longitudinal axis;
The said truncated cone is provided with the bottom face and the top part, The said bottom face is integrally formed with one end part of the said cylinder, The said top part forms the said valve seat orifice, The valve seat orifice is characterized by the above-mentioned. Fuel injector. 前記縦軸まわりに放射状に間隔をあけて配置され、前記ガイド部分と前記弁座部分との中間において、前記連続壁に形成された複数の通路が含まれることを特徴とする請求項４記載の燃料噴射器。   5. A plurality of passages formed in the continuous wall are included in the middle of the guide portion and the valve seat portion, being radially spaced around the longitudinal axis. Fuel injector. 前記支持部分により、前記縦軸から斜角をなして、前記弁座部分の頂部と前記保持部分の間に放射状に延びる環状部が形成されたことを特徴とする請求項２記載の燃料噴射器。   3. The fuel injector according to claim 2, wherein the support portion forms an annular portion that is inclined from the longitudinal axis and extends radially between the top of the valve seat portion and the holding portion. . 前記支持部分及び前記調量ディスクによってチャンバが形成されたことを特徴とする請求項６記載の燃料噴射器。   The fuel injector according to claim 6, wherein a chamber is formed by the support portion and the metering disk. 前記調量ディスクに、前記内燃機関に特有の噴霧パターンを形成するように構成された複数の調量オリフィスが含まれることを特徴とする請求項６記載の燃料噴射器。   The fuel injector according to claim 6, wherein the metering disk includes a plurality of metering orifices configured to form a spray pattern unique to the internal combustion engine. 前記均一化部材に、深絞り製造工程により形成された金属が含まれることを特徴とする請求項１記載の燃料噴射器。   The fuel injector according to claim 1, wherein the uniformizing member includes a metal formed by a deep drawing manufacturing process. 内燃機関用燃料噴射器であって、
Ａ．縦軸に沿って入口と出口が配置されたハウジングと、
Ｂ．前記出口に近接して配置され、深絞り製造工程によって金属から形成された連続壁を形成する均一化部材とを含み、
前記連続壁は、
Ｂ１．前記縦軸に沿って配置されたシリンダを形成するガイド部分、
Ｂ２．密封面及び弁座オリフィスを備え、前記縦軸に沿って配置された円錐台を形成し、前記円錐台が底面及び頂部を有しており、前記底面が前記シリンダの一方の端部と一体に形成され、前記頂部が弁座オリフィスを形成している弁座部分、
Ｂ３．前記ハウジング出口に前記均一化部材を固定する保持部分、
Ｂ４．調量ディスクがそれに取り付けられる、前記縦軸から斜角をなして、前記弁座部分の頂部と前記保持部分の間で放射状に延びる環状部を形成する支持部分及び、
Ｂ５．前記縦軸まわりにおいて間隔をあけて放射状に配置され、前記ガイド部分と前記弁座部分の中間において前記連続壁に形成された複数の通路を含み、更に、
前記内燃機関用燃料噴射器は、
Ｃ．前記ハウジング内にある密閉部材と、
Ｄ．前記弁座オリフィスに近接して前記支持部分に固定され、前記内燃機関に特有の噴霧パターンを形成すべく構成された複数の調量オリフィスを備える調量ディスクと
を含み、
前記密閉部材は、弁座から移動して、燃料流が前記密閉部材を通過できるようにする第１の位置と、前記密閉部材が前記弁座と接触して、燃料流が前記密閉部材を通過できないようにする第２の位置との間で、前記縦軸に沿って往復運動を行えるように前記ガイド部分によって位置決めされる
ことを特徴とする内燃機関用燃料噴射器。 A fuel injector for an internal combustion engine,
A. A housing with an inlet and an outlet disposed along the longitudinal axis;
B. Including a homogenizing member disposed in proximity to the outlet and forming a continuous wall formed from metal by a deep drawing manufacturing process;
The continuous wall is
B1. A guide portion forming a cylinder arranged along the longitudinal axis;
B2. A frustum disposed along the longitudinal axis, the frustum having a bottom and a top, the bottom being integrated with one end of the cylinder; A valve seat portion formed and said top forming a valve seat orifice;
B3. A holding portion for fixing the equalizing member to the housing outlet;
B4. A support portion to which a metering disc is attached, forming an annular portion extending obliquely between the top of the valve seat portion and the holding portion at an oblique angle from the longitudinal axis; and
B5. A plurality of passages formed in the continuous wall in the middle of the guide portion and the valve seat portion;
The fuel injector for the internal combustion engine is:
C. A sealing member in the housing;
D. A metering disc comprising a plurality of metering orifices secured to the support portion proximate to the valve seat orifice and configured to form a spray pattern characteristic of the internal combustion engine;
The sealing member moves from the valve seat to allow a fuel flow to pass through the sealing member; and the sealing member contacts the valve seat so that the fuel flow passes through the sealing member. A fuel injector for an internal combustion engine, which is positioned by the guide portion so as to perform reciprocating motion along the longitudinal axis with respect to a second position to be disabled. 縦軸に沿って入口と出口が配置されたハウジングと、該ハウジング内に配置された密閉部材とを含む内燃機関用燃料噴射器の製造方法であって、以下の工程を含む方法。
前記出口に近接して配置されて、弁座部分及びガイド部分を備えた連続壁を形成し、前記弁座部分に密封面及び弁座オリフィスが含まれ、前記密閉部材が前記ガイド部分により位置決めされ、前記弁座部分と接触している均一化部材を準備する工程、および
前記内燃機関に特有の噴霧パターンを形成するように構成された複数の調量オリフィスを備える調量ディスクを前記弁座オリフィスに近接して配置する工程。 A method for manufacturing a fuel injector for an internal combustion engine, including a housing having an inlet and an outlet disposed along a longitudinal axis, and a sealing member disposed in the housing, the method including the following steps.
Located adjacent to the outlet, forms a continuous wall with a valve seat portion and a guide portion, the valve seat portion includes a sealing surface and a valve seat orifice, and the sealing member is positioned by the guide portion. Providing a leveling member in contact with the valve seat portion; and a metering disc comprising a plurality of metering orifices configured to form a spray pattern specific to the internal combustion engine. Placing in close proximity to.
JP2008500684A 2005-03-07 2005-03-08 Fuel injector for internal combustion engines Pending JP2008531927A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/072,459 US7334746B2 (en) 2004-03-08 2005-03-07 Seat-lower guide combination
PCT/US2005/007470 WO2006096174A1 (en) 2005-03-07 2005-03-08 Seat-lower guide combination

Publications (1)

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JP2008531927A true JP2008531927A (en) 2008-08-14

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Application Number Title Priority Date Filing Date
JP2008500684A Pending JP2008531927A (en) 2005-03-07 2005-03-08 Fuel injector for internal combustion engines

Country Status (4)

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EP (1) EP1856404B8 (en)
JP (1) JP2008531927A (en)
DE (1) DE602005010911D1 (en)
WO (1) WO2006096174A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08218982A (en) * 1994-12-23 1996-08-27 Robert Bosch Gmbh Fuel injection valve
JPH10274129A (en) * 1997-03-27 1998-10-13 Robert Bosch Gmbh Fuel injection valve
JPH10299605A (en) * 1997-04-18 1998-11-10 Unisia Jecs Corp Fuel injector
JP2001500213A (en) * 1997-06-25 2001-01-09 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 Method of manufacturing valve and valve seat used for valve
JP2001507097A (en) * 1996-12-21 2001-05-29 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 Valve with a combined valve seat and perforated disc

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10319694A1 (en) * 2003-05-02 2004-12-02 Robert Bosch Gmbh Fuel injector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08218982A (en) * 1994-12-23 1996-08-27 Robert Bosch Gmbh Fuel injection valve
JP2001507097A (en) * 1996-12-21 2001-05-29 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 Valve with a combined valve seat and perforated disc
JPH10274129A (en) * 1997-03-27 1998-10-13 Robert Bosch Gmbh Fuel injection valve
JPH10299605A (en) * 1997-04-18 1998-11-10 Unisia Jecs Corp Fuel injector
JP2001500213A (en) * 1997-06-25 2001-01-09 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 Method of manufacturing valve and valve seat used for valve

Also Published As

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EP1856404B1 (en) 2008-11-05
WO2006096174A1 (en) 2006-09-14
EP1856404B8 (en) 2009-01-14
DE602005010911D1 (en) 2008-12-18
EP1856404A1 (en) 2007-11-21

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