JP4131251B2 - 燃料噴射装置 - Google Patents
燃料噴射装置 Download PDFInfo
- Publication number
- JP4131251B2 JP4131251B2 JP2004143125A JP2004143125A JP4131251B2 JP 4131251 B2 JP4131251 B2 JP 4131251B2 JP 2004143125 A JP2004143125 A JP 2004143125A JP 2004143125 A JP2004143125 A JP 2004143125A JP 4131251 B2 JP4131251 B2 JP 4131251B2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- valve
- pressure
- oil
- chamber
- 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 - Fee Related
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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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
- F02M63/0035—Poppet valves, i.e. having a mushroom-shaped valve member that moves perpendicularly to the plane of the valve seat
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0045—Three-way valves
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Description
101 ノズル部
102 制御弁部
103 ピエゾ駆動部
1 バルブニードル
11 弁部
12 摺動部
13 細径部
14 ハウジング
15 高圧通路
16 低圧通路
21 バルブ室
22 3方弁第1シート
23 3方弁第2シート
24 オリフィス
26 低圧部
3 ノズルニードル
32 油溜まり室
34 噴孔
4 制御室
41 サブオリフィス
5 シリンダ
51 筒状部
52 フランジ
53 バルブピストンプリセットスプリング
54 連通孔
55 低圧室
61 ピエゾスタック(アクチュエータ)
62 ピエゾピストン(第1ピストン)
621 筒状部
622 フランジ部
63 油密室
64 バルブピストン(第2ピストン)
641 下端部
642 フランジ部
65 ピエゾスプリング
66 ピストン部材
7 連通路
71 連通孔
72 連通孔
73 ボール弁
Claims (5)
- 通電により変位を発生するアクチュエータと、上記アクチュエータと一体に変位する第1ピストンと、上記第1ピストンと油密室を挟んで対向する第2ピストンを有し、上記アクチュエータの変位を油圧を介して上記第2ピストンに伝達する油圧伝達装置をノズルニードルの開閉を制御する制御弁の駆動部として内蔵し、上記ノズルニードルに閉弁方向の圧力を作用させる制御室を設けて、上記駆動部の上記第2ピストンによって上記制御弁を開閉駆動することにより、上記制御室の圧力を増減させて上記ノズルニードルを昇降させる燃料噴射装置において、上記第1および第2ピストンの一方を一端閉鎖の筒状として、その筒状部をハウジングに固定される筒状シリンダに外挿する一方、上記筒状シリンダに上記第1および上記第2ピストンのもう一方を内挿して、上記第1および第2ピストンを上記筒状シリンダの内外周面に対して摺動自在とし、かつ上記第2ピストンをスプリングの付勢力によって上記制御弁方向に付勢して、上記筒状部と上記筒状シリンダと上記第1および上記第2ピストンのもう一方とで囲まれる空間に作動油を充填して上記油密室としたことを特徴とする燃料噴射装置。
- 通電により変位を発生するアクチュエータと、上記アクチュエータと一体に変位する大径ピストンと、上記大径ピストンと油密室を挟んで対向する小径ピストンを有し、上記アクチュエータの変位を油圧を介して上記小径ピストンに拡大して伝達する油圧伝達装置をノズルニードルの開閉を制御する制御弁の駆動部として内蔵し、上記ノズルニードルに閉弁方向の圧力を作用させる制御室を設けて、上記駆動部の上記小径ピストンによって上記制御弁を開閉駆動することにより、上記制御室の圧力を増減させて上記ノズルニードルを昇降させる燃料噴射装置において、上記大径ピストンを一端閉鎖の筒状として、その筒状部をハウジングに固定される筒状シリンダに外挿する一方、上記筒状シリンダに上記小径ピストンを内挿して、上記大径および小径ピストンを上記筒状シリンダの外周面および内周面に対してそれぞれ摺動自在とし、かつ上記小径ピストンをスプリングの付勢力によって上記制御弁方向に付勢して、上記大径ピストンの筒状部と上記筒状シリンダと上記小径ピストンとで囲まれる空間に作動油を充填して上記油密室としたことを特徴とする燃料噴射装置。
- 上記一端閉鎖の筒状としたピストンの、閉鎖端部と筒状部とを別部材にて構成した請求項1または2に記載の燃料噴射装置。
- 上記油密室と低圧部とを連通する連通路を設け、該連通路に、上記油密室の圧力が所定圧を下回った時に上記油密室に作動油を流入させるチェック弁を設けた請求項1から3のいずれか記載の燃料噴射装置。
- 上記アクチュエータがピエゾアクチュエータである請求項1から4のいずれか記載の燃料噴射装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004143125A JP4131251B2 (ja) | 2004-05-13 | 2004-05-13 | 燃料噴射装置 |
DE200510022137 DE102005022137A1 (de) | 2004-05-13 | 2005-05-12 | Hydraulische Übertragungsvorrichtung und Kraftstoffeinspritzvorrichtung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004143125A JP4131251B2 (ja) | 2004-05-13 | 2004-05-13 | 燃料噴射装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005325725A JP2005325725A (ja) | 2005-11-24 |
JP4131251B2 true JP4131251B2 (ja) | 2008-08-13 |
Family
ID=35472257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004143125A Expired - Fee Related JP4131251B2 (ja) | 2004-05-13 | 2004-05-13 | 燃料噴射装置 |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP4131251B2 (ja) |
DE (1) | DE102005022137A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005031882B4 (de) * | 2004-07-08 | 2016-12-01 | Denso Corporation | Antriebskraftübertragungsvorrichtung und Einspritzvorrichtung, die selbige verwendet |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7506825B2 (en) * | 2006-05-31 | 2009-03-24 | Caterpillar Inc. | Fuel injector control system |
DE102007047426A1 (de) * | 2007-05-15 | 2008-11-20 | Robert Bosch Gmbh | Injektor mit Piezoaktor |
DE102007050578B4 (de) | 2007-10-20 | 2016-02-18 | Hofer Forschungs- Und Entwicklungs Gmbh | Getriebeaktuator und Getriebe |
JP2010019147A (ja) | 2008-07-09 | 2010-01-28 | Nippon Soken Inc | 燃料噴射弁 |
DE102009000830A1 (de) * | 2009-02-13 | 2010-08-19 | Robert Bosch Gmbh | Kraftstoffinjektor mit längeneinstellbarem Kopplerkonzept |
DE102010031497A1 (de) * | 2010-07-19 | 2012-01-19 | Robert Bosch Gmbh | Kraftstoffinjektor mit hydraulischer Kopplereinheit |
-
2004
- 2004-05-13 JP JP2004143125A patent/JP4131251B2/ja not_active Expired - Fee Related
-
2005
- 2005-05-12 DE DE200510022137 patent/DE102005022137A1/de not_active Ceased
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005031882B4 (de) * | 2004-07-08 | 2016-12-01 | Denso Corporation | Antriebskraftübertragungsvorrichtung und Einspritzvorrichtung, die selbige verwendet |
Also Published As
Publication number | Publication date |
---|---|
JP2005325725A (ja) | 2005-11-24 |
DE102005022137A1 (de) | 2006-02-09 |
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