JP6488134B2 - 燃料噴射弁 - Google Patents
燃料噴射弁 Download PDFInfo
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- JP6488134B2 JP6488134B2 JP2015011929A JP2015011929A JP6488134B2 JP 6488134 B2 JP6488134 B2 JP 6488134B2 JP 2015011929 A JP2015011929 A JP 2015011929A JP 2015011929 A JP2015011929 A JP 2015011929A JP 6488134 B2 JP6488134 B2 JP 6488134B2
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- Prior art keywords
- valve body
- valve
- rigidity
- fuel injection
- seat
- Prior art date
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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
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
-
- 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
-
- 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
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
- F02M51/066—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
-
- 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
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0685—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
-
- 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
-
- 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
- F02M61/166—Selection of particular materials
-
- 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
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
- F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
-
- 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
-
- 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
- F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs
-
- 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
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical 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
- F02M2200/90—Selection of particular materials
- F02M2200/9015—Elastomeric or plastic materials
Description
図1は、本発明にかかる燃料噴射弁の例として、電磁式燃料噴射弁の例を示す断面図である。図1に示した電磁式燃料噴射弁は、筒内直接噴射式のガソリンエンジン向けの電磁式燃料噴射弁の例であるが、ポート噴射式のガソリンエンジン向けの電磁式燃料噴射弁や、ピエゾ素子や磁歪素子で駆動される燃料噴射弁においても有効である。
(燃料噴射弁の基本動作)
図1において、燃料は燃料供給口112から供給され、燃料噴射弁の内部に供給される。電磁式燃料噴射弁100は、内部に弁体101を有し、弁体101の対向する位置には、弁座102が設けられている。弁座102には、図示しない燃料噴射孔を有している。また弁体101は、上流側につば部113を有し、つば部113に接するようにスプリング110が設けられ、弁体101はつば部113に設けられた付勢力の伝達面114を介して、閉弁方向に付勢されている。さらに弁体101は、弁座102と接触してシール座を形成するシート部115を有しており、コイル108に通電がないときには、弁体101はスプリング110によって弁座102に押し付けられ、燃料をシールする構造となっている。
(課題およびバウンド現象の説明)
しかし、このようにコイル108への通電と非通電を切り替えて、弁体101を開閉する燃料噴射弁において、閉弁時、弁体101と弁座102の衝突による弾性変形によって、弁体101のバウンドが生ずる場合がある。図2、図3を用いて、本発明を用いない場合の一般的な燃料噴射弁における弁体のバウンドが生ずる現象について説明する。図2におけるD1は弁体101のつば部113の変位を示しており、D2は弁体のシート部115の変位を示している。
(本発明の構成)
本発明では、弁体200のバウンシングを低減するために、弁体200の形状を図4に示すような形状にする。弁体200のバウンドが低減可能な構成は、弁体200に付勢されるばね力を弁体に伝える付勢力の伝達面202と、弁体200と弁座102が接触することで燃料をシールするシート部205の間に、シート部より軸方向の単位長さ当たりの軸方向の剛性が柔となる低剛性部206を有する構成とする。また、弁体200の中心点210より上流側と下流側に分けた場合、弁体200の重心点201を有する方の剛性値K1をもう一方の剛性値K2よりも小さい。このような構成とすることにより、低剛性部206を有した弁体200の重心201から上流側の剛性値K3と、重心からシート部までの剛性値K4の差を、小さくすることができる。また望ましくは、K3、K4を同程度の剛性値になるようにするために、例えば低剛性部の長さや幅を設定することで達成される。また弁体200における質量の関係は、低剛性部206よりも上流側に位置する振動吸収部208の質量M1は、上記低剛性部206を含む下流側の質量M2よりも小さいことが望ましい。
(作用・効果)
このように、付勢力の伝達面202とシート部205との間に、外径を減じることで実現する低剛性部206を設けることで、弁体200が弁座102に衝突した際、振動吸収部208での変形量を大きくすることができる。振動吸収部208の変形量が大きくなると、閉弁の過程で弁体に蓄えられた運動エネルギは、振動吸収部208の変形量に変換されやすくなるため、シート部205と弁座部102の衝突位置での変形量を小さくすることができる。この変形を小さくすると、弁体200が弁座102から離間しようとする方向に発生するシート部205での慣性による力が小さくなり、弁体のバウンドを抑制することが可能となる。さらに、弁体200の重心201から付勢力の伝達面202までの剛性値K3と、重心201からシート部205までの剛性値K4は、同程度の剛性値すなわち、剛性値の差が20%以内となるように、低剛性部206の長さや幅を設定すると、衝突時に励起される固有振動モードの寄与率を変え、バウンドを抑制する振動モードを励起しやすくすることができる。
また、低剛性部206の上流側および下流側を連ねる連結部207a、207bは滑らかに接続されていることから、衝突によって発生する応力が集中するのを抑制することができる。
弁座・・・102、
可動鉄心・・・106、
固定鉄心・・・107、
コイル・・・108、
ヨーク・・・109、
スプリング・・・110、
燃料供給口・・・112、
つば部・・・113、
付勢力の伝達面・・・114、202、302、402、
シート部・・・115、205、305、405、
重心点・・・201、301、401、
低剛性部・・・206、207a・・・
連結部・・・207a、207b
振動吸収部・・・208、308、408
中心点・・・210、310、410
Claims (5)
- 弁座に接離して噴射孔を開閉する弁体と、前記弁体を前記弁座の方向に付勢する弾性部材と、前記弁体から接離した可動鉄心と、前記可動鉄心に対向する固定鉄心と、前記可動鉄心を移動させるために電磁力を発生するコイルとを有する燃料噴射弁において、
前記弁体に弾性部材の付勢力を伝達する付勢力の伝達面と、前記弁体と前記弁座が接離するシート部との間に、軸方向の単位長さ当たりの剛性が減じられた低剛性部を少なくとも一つ有し、
前記弁体の軸方向の中心点より上流側の軸方向の剛性値と前記中心点より下流側の剛性値は、前記弁体の重心を有する側の剛性値の方が小さいことを特徴とする燃料噴射弁。 - 請求項1記載の燃料噴射弁において、前記低剛性部よりも上流側に位置する弁体の質量は、前記低剛性部を含む下流側の弁体の質量に比べて軽いことを特徴とする燃料噴射弁。
- 請求項2記載の燃料噴射弁において、前記弁体の重心より上流側の軸方向の剛性値と前記重心より下流側の剛性値は、同じ程度の剛性値であることを特徴とする燃料噴射弁。
- 請求項3記載の燃料噴射弁において、前記弁体の重心より上流側の軸方向の剛性値と前記重心より下流側の剛性値との差は、20%以内であることを特徴とする燃料噴射弁。
- 請求項1記載の燃料噴射弁において、前記弁体の低剛性部の外径は、前記シート部に現れる最初の極大値よりも径が小さいことを特徴とする燃料噴射弁。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015011929A JP6488134B2 (ja) | 2015-01-26 | 2015-01-26 | 燃料噴射弁 |
EP16743048.7A EP3263885B1 (en) | 2015-01-26 | 2016-01-08 | Fuel injection valve |
PCT/JP2016/050411 WO2016121444A1 (ja) | 2015-01-26 | 2016-01-08 | 燃料噴射弁 |
CN201680006167.6A CN107208592B (zh) | 2015-01-26 | 2016-01-08 | 燃料喷射阀 |
US15/545,930 US10378496B2 (en) | 2015-01-26 | 2016-01-08 | Fuel injection valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015011929A JP6488134B2 (ja) | 2015-01-26 | 2015-01-26 | 燃料噴射弁 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2016138450A JP2016138450A (ja) | 2016-08-04 |
JP6488134B2 true JP6488134B2 (ja) | 2019-03-20 |
Family
ID=56543064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2015011929A Active JP6488134B2 (ja) | 2015-01-26 | 2015-01-26 | 燃料噴射弁 |
Country Status (5)
Country | Link |
---|---|
US (1) | US10378496B2 (ja) |
EP (1) | EP3263885B1 (ja) |
JP (1) | JP6488134B2 (ja) |
CN (1) | CN107208592B (ja) |
WO (1) | WO2016121444A1 (ja) |
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GB0919645D0 (en) * | 2009-11-10 | 2009-12-23 | Sentec Ltd | Flux switched fuel injector |
EP2354530B1 (en) * | 2010-02-04 | 2013-04-10 | Delphi Technologies Holding S.à.r.l. | Needle for needle valve |
US9133954B2 (en) * | 2010-09-06 | 2015-09-15 | Toyota Jidosha Kabushiki Kaisha | Electromagnetic linear valve |
DE102011078732A1 (de) | 2011-07-06 | 2013-01-10 | Robert Bosch Gmbh | Vorrichtung zur Einspritzung von Kraftstoff |
JP2013072298A (ja) | 2011-09-27 | 2013-04-22 | Hitachi Automotive Systems Ltd | 燃料噴射弁 |
US9506429B2 (en) * | 2013-06-11 | 2016-11-29 | Cummins Inc. | System and method for control of fuel injector spray using ultrasonics |
JP6347444B2 (ja) * | 2014-09-12 | 2018-06-27 | 日立オートモティブシステムズ株式会社 | 電磁弁 |
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EP3263885A1 (en) | 2018-01-03 |
US20170370337A1 (en) | 2017-12-28 |
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EP3263885B1 (en) | 2020-07-01 |
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