CN101749156B - Fuel injection valve for internal combustion engine - Google Patents

Fuel injection valve for internal combustion engine Download PDF

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Publication number
CN101749156B
CN101749156B CN2009102582400A CN200910258240A CN101749156B CN 101749156 B CN101749156 B CN 101749156B CN 2009102582400 A CN2009102582400 A CN 2009102582400A CN 200910258240 A CN200910258240 A CN 200910258240A CN 101749156 B CN101749156 B CN 101749156B
Authority
CN
China
Prior art keywords
nozzle
hole
nozzle body
pin guide
guide body
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
Application number
CN2009102582400A
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Chinese (zh)
Other versions
CN101749156A (en
Inventor
A·斯蒂克诺思
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.)
MAN Energy Solutions SE
Original Assignee
MAN Diesel SE
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 MAN Diesel SE filed Critical MAN Diesel SE
Publication of CN101749156A publication Critical patent/CN101749156A/en
Application granted granted Critical
Publication of CN101749156B publication Critical patent/CN101749156B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M47/06—Other fuel injectors peculiar thereto
    • 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
    • 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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/03—Reducing weight

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  • 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)

Abstract

The invention relates to a fuel injection valve for an internal combustion engine, comprising a nozzle body (1) with a bore (2); a nozzle needle (3) which is arranged in the bore (2) of the nozzle body (1) so as to be axially displaceable, wherein the radially outer diameter of the nozzle needle (3) is smaller than the radially inner diameter of the bore (2) of the nozzle body (1); a needle guide body (4) which is arranged in the bore (2) of the nozzle body (1) and has a bore (5), in which bore (5) the nozzle needle (3) is guided axially movably, wherein the radially outer diameter of the nozzle needle (3) substantially corresponds to the radially inner diameter of the bore (5) of the needle guide body (4); and a fuel supply line (6) which is formed in the needle guide body (4) and opens into a chamber between the nozzle needle (3) and the nozzle body (1).

Description

The Fuelinjection nozzle that is used for internal-combustion engine
Technical field
The present invention relates to a kind of Fuelinjection nozzle (Kraftstoff-Einspritzventil) that is used for internal-combustion engine of preamble according to claim 1.
Background technique
The Fuelinjection nozzle that is used for internal-combustion engine generally comprises with porose nozzle body (Duesenkoerper) and axially movably is arranged in the valve needle (Duesennadel) of nozzle body.At its place, end towards combustion chambers of internal combustion engines, nozzle body is configured to at least one for the nozzle bore (Duesenloch) that injects fuel into the firing chamber.Usually be configured with pressure chamber (Druckraum) in the zone of valve needle in nozzle body, fuel is transported to wherein and then by fuel inlet pipe (Kraftstoffzuleitung) and is ejected in the firing chamber by nozzle bore.
In a kind of form of implementation of known injection valve, valve needle is configured to hollow needle, that is to say, is configured with fuel channel (Kraftstoffkanal) in valve needle.This type of Fuelinjection nozzle is for example shown in the file DE 102005060655A1.
Yet, in the Fuelinjection nozzle of most routine, be arranged in the nozzle body to the fuel inlet pipe of pressure chamber.Only by way of example, need mention file DE 19808660A1 at this, DE 102004002286A1, WO 2003/031807A1 and WO 2004/111430A1, therein, be configured in the hole that fuel inlet pipe in the nozzle body respectively leads to nozzle body, expand in the pressure chamber of (aufgeweiteten) around valve needle annularly.
Summary of the invention
The object of the invention is to, provide the Fuelinjection nozzle that is used for internal-combustion engine through improving for use.
This purpose realizes by the Fuelinjection nozzle that is used for internal-combustion engine with the feature of claim 1.
The Fuelinjection nozzle that is used for internal-combustion engine comprises with porose nozzle body; Valve needle, it axially movably is arranged in the hole of nozzle body, and wherein, the radially outer diameter (radialeAussendurchmesser) of valve needle is less than the radially inner diameter (radialeInnendurchmesser) in the hole of nozzle body; The pin guide body, it is arranged in the hole of nozzle body and has the hole that valve needle therein axially movably is directed, wherein, the radially outer diameter of valve needle conform to the radially inner diameter in the hole of pin guide body haply (entsprechen); And, fuel feed pipe road (Kraftstoffzufuhrleitung), it is configured in the pin guide body and leads in the chamber (Raum) between valve needle and nozzle body.
The pin guide body is the member that separates with nozzle body.According to the present invention, the fuel feed pipe road is not to be configured in the nozzle body, but is configured in this pin guide body.Simplified significantly the manufacturing of nozzle body by this measure.This has advantage in particular for this reason, because by chance this nozzle body is the wear-out part of injection valve.
The setting in the fuel feed pipe road by penetrating the pin guide body, can cancel the annularly pressure chamber of expansion in the hole of nozzle body, and there is not the fuel channel (wedge (Spickels)) in leading to obliquely each other, just as in the Fuelinjection nozzle (therein, the fuel feed pipe road is configured in the nozzle body) of routine, be exactly this situation.
In addition, reduced the member load by pin guide body inserting between nozzle body and valve needle.As a result of, for Fuelinjection nozzle and the jet pressure of Yan Genggao allows.
The use of the pin guide body of placed in the middle being guided through of the valve needle in the hole of nozzle body in the middle of being placed in and obviously obtained and guaranteed more simply better.Need not the heating process (Temperiervorgaenge) of member in assembling, this simplification has also been shortened assembling.
In a kind of design proposal of the present invention, the fuel feed pipe road penetrated the pin guide body in roughly axial direction extension.Like this, not forming the fuel channel in leading to obliquely each other, but, can realize to the fuel supply of the nozzle bore of injection valve almost unblockedly.
In another design proposal of the present invention, the pin guide body utilizes press fit (Presspassung) to be placed in the hole of nozzle body.Guaranteed the gratifying fixing and sealing effect of pin guide body by press fit.
In another design proposal of the present invention, the hole of pin guide body is orientated (ausgerichtet) coaxially with the hole of nozzle body haply.This structure has been simplified the manufacturing of each member and their assembling.
Description of drawings
The present invention above-mentioned and other feature and advantage from the description of following preferred implementing form according to appended drawing, can be understood better.
Fig. 1 has shown the schematic cut-away section view according to a kind of preferred form of implementation of Fuelinjection nozzle of the present invention.
List of reference characters
1 nozzle body
2 holes
3 valve needles
4 pin guide body
5 holes
6 fuel feed pipe roads
Embodiment
The part that in Fig. 1, has only shown Fuelinjection nozzle.Shown in intercept above link in particular the operating mechanism that this injection valve is arranged, and, thereunder also have in particular the jet nozzles (Einspritzduese) that protrudes in the combustion chambers of internal combustion engines.Because aspect these other Fuelinjection nozzle part, the present invention also is not confined on the special form of implementation, so can save further specifying of they in the scope of this application.
Fuelinjection nozzle has nozzle body 1, its with arrange in middle heart haply, haply in the hole 2 of axial direction (the up/down direction among Fig. 1) stretch (verlaufen).As represented in Fig. 1, this hole 2 in the nozzle body 1 also nonessentially has constant shape of cross section or a constant diameter.
In the hole 2 of nozzle body 1, axially be furnished with movably valve needle 3.By the movement of valve needle 3, in known manner, lower end, namely be opened and closed at least one nozzle bore towards the jet nozzles at the place, end of the firing chamber of internal-combustion engine.At this, valve needle 3 usually biased (vorgespannt) in the closed position of injection valve.
As shown in FIG. 1, valve needle 3 is not to be directed by nozzle body 1, but is directed in the corresponding hole 5 of independent pin guide body 4.For this reason, pin guide body 4 preferably is fixed in the hole 2 of nozzle body 1 by means of press fit.In addition, even preferably orientation---this functional speech for Fuelinjection nozzle is not necessarily essential coaxially with each other in two holes 2 of nozzle body 1 and/or pin guide body 4 and 5.
For the structure of described injection valve with extra pin guide body 4, the radially outer diameter of valve needle 3 must be less than the radially inner diameter in the hole 2 of nozzle body 1.For the accurately guiding of valve needle 3, its radially outer diameter conform to the radially inner diameter in the hole 5 of pin guide body 4 haply further.
In addition, in pin guide body 4, be configured with at least one fuel feed pipe road 6.Its extension penetrated pin guide body 4 and stretched in the roughly axial direction of Fuelinjection nozzle.The top in fuel feed pipe road, namely be in away from the end of (abgewandte) combustion chambers of internal combustion engines and other fuel supply channel and be connected, and, its underpart, namely finally lead to chamber between valve needle 3 and the nozzle body 1 towards the end of firing chamber.According to the form of implementation of pin guide body 4, fuel feed pipe road 6 also at first leads in the chamber between pin guide body 3 and the nozzle body 1, as shown in FIG. 1.
By fuel feed pipe road 6 be not in nozzle body 1 but structure in pin guide body 4, the manufacturing of nozzle body that forms the wear-out part of Fuelinjection nozzle is simplified significantly.Similarly, can save the annularly pressure chamber of expansion in the hole 2 of nozzle body 1.
The accurate guiding of the valve needle 3 in the hole 2 of nozzle body 1 is simplified and improved to pin guide body 4.In addition, the simple press fit between pin guide body 4 and nozzle body 1 enough is used for locking pin guide body 4.Each member stand under load slightly only in assembling, thus Fuelinjection nozzle according to the present invention is suitable for higher jet pressure.

Claims (3)

1. Fuelinjection nozzle that is used for internal-combustion engine, with:
Nozzle body (1) with porose (2);
Valve needle (3), it axially movably is arranged in the hole (2) of described nozzle body (1), and wherein, the radially outer diameter of described valve needle (3) is less than the radially inner diameter in the hole (2) of described nozzle body (1);
Pin guide body (4), it is arranged in the hole (2) of described nozzle body (1) and has hole (5), in described hole (5), described valve needle (3) axially movably is directed, wherein, the radially outer diameter of described valve needle (3) conforms to the radially inner diameter in the hole (5) of described pin guide body (4) haply; And,
Fuel feed pipe road (6), its be configured in the described pin guide body (4) and lead to described valve needle (3) and described nozzle body (1) between chamber in,
Wherein, the fuel feed pipe road is not configured in the nozzle body,
And wherein,
Described pin guide body (4) utilizes press fit to be placed in the hole (2) of described nozzle body (1).
2. Fuelinjection nozzle according to claim 1 is characterized in that, described fuel feed pipe road (6) extends through described pin guide body (4) in roughly axial direction.
3. according to each described Fuelinjection nozzle in the aforementioned claim, it is characterized in that, the hole (5) of described pin guide body (4) is orientated coaxially with the hole (2) of described nozzle body (1) haply.
CN2009102582400A 2008-12-10 2009-12-10 Fuel injection valve for internal combustion engine Expired - Fee Related CN101749156B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008061400.9 2008-12-10
DE102008061400A DE102008061400A1 (en) 2008-12-10 2008-12-10 Fuel injection valve for an internal combustion engine

Publications (2)

Publication Number Publication Date
CN101749156A CN101749156A (en) 2010-06-23
CN101749156B true CN101749156B (en) 2013-03-27

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CN2009102582400A Expired - Fee Related CN101749156B (en) 2008-12-10 2009-12-10 Fuel injection valve for internal combustion engine

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JP (1) JP5027194B2 (en)
KR (1) KR20100067034A (en)
CN (1) CN101749156B (en)
DE (1) DE102008061400A1 (en)
FI (1) FI20096088A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5838107B2 (en) * 2012-03-21 2015-12-24 日立オートモティブシステムズ株式会社 Fuel injection valve
CN104533679B (en) * 2014-12-30 2016-09-07 南岳电控（衡阳）工业技术股份有限公司 A kind of injector control valve and use the high pressure common rail fuel injection system of this injector control valve

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5088467A (en) * 1984-03-05 1992-02-18 Coltec Industries Inc Electromagnetic injection valve
CN1198507A (en) * 1997-05-05 1998-11-11 贵州红林机械厂 Needle valve injector
DE19929881A1 (en) * 1999-06-29 2001-01-04 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
DE19950223A1 (en) * 1999-10-19 2001-04-26 Bosch Gmbh Robert Injector for common rail injection system for IC engines has end face of valve piston larger than hole, this being larger than sealing line between needle and needle seat
CN1460151A (en) * 2001-03-28 2003-12-03 罗伯特·博施有限公司 Fuel-injection valve for IC engine
CN1977106A (en) * 2004-07-02 2007-06-06 罗伯特·博世有限公司 Fuel injection valve
CN101080568A (en) * 2004-12-16 2007-11-28 罗伯特·博世有限公司 Fuel injection valve for an internal combustion engine

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE442765C (en) * 1924-02-28 1927-04-11 Fried Krupp Akt Ges Fuel injection device for internal combustion engines with direct injection of fuel by fuel pump and fuel valve
GB1334939A (en) * 1971-04-13 1973-10-24 Barkas Werke Ifa Kom Fuer Kraf Fuel injection nozzles for internal combustion engines
GB8318635D0 (en) * 1983-07-09 1983-08-10 Lucas Ind Plc Fuel injection nozzles
DE3408012A1 (en) * 1984-03-05 1985-09-05 Gerhard Dipl.-Ing. Warren Mich. Mesenich ELECTROMAGNETIC INJECTION VALVE
GB8628600D0 (en) * 1986-11-29 1987-01-07 Lucas Ind Plc Fuel injection nozzles
JPH0476267A (en) * 1990-07-17 1992-03-11 Toyota Motor Corp Fuel injector
JP3182057B2 (en) * 1995-04-28 2001-07-03 株式会社デンソー Fuel injection valve
DE19808660A1 (en) 1998-03-02 1999-10-07 Siemens Ag Fuel injection valve for internal combustion (IC) engines
DE10149277A1 (en) 2001-10-05 2003-04-24 Siemens Ag Fuel injection valve, for an IC motor, has grooves at the conical tip of the valve needle matching the injection openings in the valve body
DE10241360A1 (en) * 2002-09-06 2004-03-18 Siemens Ag Injection device for injecting of fuel under pressure has nozzle needle guided in guide sleeve which has openings to enable pressure compensation in region of guide sleeve
DE10326043A1 (en) 2003-06-10 2004-12-30 Robert Bosch Gmbh Injection nozzle for internal combustion engines
DE10346222A1 (en) * 2003-09-23 2005-04-14 Robert Bosch Gmbh Fuel injection device, especially for internal combustion engine with direct injection, has alignment arrangement that aligns sleeve part radially relative to housing recess and valve element is guided in sleeve part
DE102004002286A1 (en) 2004-01-16 2005-08-11 Man B & W Diesel Ag fuel Injector
DE102005060655A1 (en) 2005-12-19 2007-06-21 Robert Bosch Gmbh Fuel injection valve for internal combustion engines has valve needle axially displaceable in valve guide bore with pressure chamber on end face on valve seat side

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5088467A (en) * 1984-03-05 1992-02-18 Coltec Industries Inc Electromagnetic injection valve
CN1198507A (en) * 1997-05-05 1998-11-11 贵州红林机械厂 Needle valve injector
DE19929881A1 (en) * 1999-06-29 2001-01-04 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
DE19950223A1 (en) * 1999-10-19 2001-04-26 Bosch Gmbh Robert Injector for common rail injection system for IC engines has end face of valve piston larger than hole, this being larger than sealing line between needle and needle seat
CN1460151A (en) * 2001-03-28 2003-12-03 罗伯特·博施有限公司 Fuel-injection valve for IC engine
CN1977106A (en) * 2004-07-02 2007-06-06 罗伯特·博世有限公司 Fuel injection valve
CN101080568A (en) * 2004-12-16 2007-11-28 罗伯特·博世有限公司 Fuel injection valve for an internal combustion engine

Also Published As

Publication number Publication date
DE102008061400A1 (en) 2010-06-17
FI20096088A0 (en) 2009-10-22
KR20100067034A (en) 2010-06-18
JP5027194B2 (en) 2012-09-19
CN101749156A (en) 2010-06-23
JP2010138894A (en) 2010-06-24
FI20096088A (en) 2010-06-11

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