EP1304476A2 - Hochdruckfester Injektorkörper - Google Patents
Hochdruckfester Injektorkörper Download PDFInfo
- Publication number
- EP1304476A2 EP1304476A2 EP02015756A EP02015756A EP1304476A2 EP 1304476 A2 EP1304476 A2 EP 1304476A2 EP 02015756 A EP02015756 A EP 02015756A EP 02015756 A EP02015756 A EP 02015756A EP 1304476 A2 EP1304476 A2 EP 1304476A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve chamber
- injector body
- inlet opening
- bulges
- inlet
- 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.)
- Granted
Links
- 239000000446 fuel Substances 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
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
- F02M61/16—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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/008—Arrangement of fuel passages inside of injectors
-
- 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
- F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations
-
- 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
Definitions
- the invention relates to an injector body for a Fuel injection system, wherein the injector body one essentially cylindrical valve chamber has in the via an inlet bore in a Inlet opening in the valve compartment opens, fuel under High pressure can be introduced.
- Such injector bodies for fuel injection systems have a substantially cylindrical shape Valve chamber, in the wall of which an inlet opening Inlet bore comes to rest.
- the inlet bore is in place for its part in connection with a pressure connection at which the supply line for fuel under high pressure flows out of a high-pressure collecting space.
- the High pressure resistance of the injector body depends on the The geometry of the inlet area is crucial.
- the Intersection of the inlet bore with the valve chamber is the most stressed part.
- One of the parameters is here the inlet angle of the inlet bore from High pressure manifold (common rail) in the injector body. Is this angle between the central axis of the Inlet bore and longitudinal axis of the valve chamber about 90 °, the stresses in the intersection area can be low being held.
- the installation conditions on the cylinder head However, an internal combustion engine does not always allow Entry angle of 90 °.
- the Valve space at least in the area of the inlet opening of the Inlet bore to the valve chamber in the circumferential direction adjacent to this inlet opening, a bulge of the Cross section on. So it comes from both sides of the Inlet opening in the valve chamber for an increase in volume.
- Is the entry angle (angle between the central axis the inlet bore and the longitudinal axis of the valve chamber) 90 ° are the bulges proposed according to the invention of the valve chamber cross section advantageously in one Plane perpendicular to the longitudinal axis of the valve space.
- the longitudinal direction of the valve chamber extends Bulge at least over the area of the inlet opening.
- the plane in which the bulges lie in orientate in the same way as the inlet bore so that the center line of the inlet bore through this plane runs.
- the bulges in the Cross section perpendicular to the longitudinal axis of the valve chamber to install.
- valve chambers are cylindrical in shape accordingly have a circular cross section (perpendicular to the longitudinal axis of the valve chamber).
- the Bulges according to the invention run in the area of Inlet opening of the inlet hole in each case in the circumferential direction of the valve chamber adjacent to the inlet opening, so that the Bulges to deviate from the circular Cross section. It has been shown that a large Strength increases when there is a bulge extends at least to a level defined by the Inlet opening and parallel to the longitudinal axis of the valve chamber runs. Again, it is particularly advantageous if the bulges are arranged symmetrically to the inlet opening are. Extend the bulges over the above Level out, so that arise under internal pressure Bending compressive stresses in the area of the inlet opening Even better compensate for notch tension stresses that occur.
- the invention proposed bulges up to the above Plane parallel to the longitudinal axis of the valve space and extends through the inlet opening, is it is advantageous if the valve chamber cross-section is even is continued up to the named level, the Diameter then the maximum diameter of the valve space can correspond. With such a configuration showed that a further increase in strength can be achieved if the inlet bore is eccentric in with respect to the valve chamber.
- FIG. 1 The essential structure of an injector body 1 is shown in FIG. 1 in a section through the longitudinal axis of the injector body 1.
- the injector body 1 essentially comprises one cylindrical valve chamber 3, in the wall of which one Inlet opening 7 for the supply of high pressure standing fuel. This inlet opening 7 forms the mouth of the inlet bore 2 in the valve chamber 3. Die Inlet bore 2 leads to the pressure connection 5 to which the High pressure manifold (common rail) connects.
- the injector body in turn has an internal thread 4 Connection to the injection system.
- the entry angle i.e. the angle between Longitudinal axis of the valve chamber 3 and central axis of the Inlet bore 2, in the illustration according to FIG. 1 Although less than 90 °, it is still in the area above 75 °, i.e. in an area in which one tension-reducing effect through the entry angle given is.
- FIG. 2A is a highly schematized one according to the invention Injector body 1 in the same way as from Fig. 1 shown. The same elements are the same Provide reference numerals.
- the inlet hole 2 leads here in the right angle to the valve chamber 3 of the injector body 1.
- FIG. 2A are those in the plane Bulges 8 of the perpendicular to the plane of the drawing Valve chamber cross section hardly due to the type of representation recognizable.
- FIG. 2B shows Section along the line A-A of Fig. 2A in a clear manner the bulges 8 according to the invention on both sides of the Inlet opening 7 of the inlet hole 2.
- the bulges 8 of the valve chamber cross section are in this example symmetrical to the inlet opening 7 and are wide led back towards the inlet hole.
- the bulges 8 change the Cross section of the valve chamber 3 at least in the area of Inlet opening 7 such that the original circular cross section only in the inlet opening 7 opposite half of the valve chamber 3 maintained while in the other half with the valve compartment maximum diameter up to a plane 9 that is parallel to the longitudinal axis 10 of the valve chamber 3 and through the Inlet opening 7 runs, is continued and above in addition two symmetrical to the center line of the inlet bore 2 and has indentations lying behind level 9.
- the bulges 8 shown lead to a Deformation of the valve chamber 3 under internal pressure with a Training of bending pressure and circumferential tensile stresses in Area of the bulges 8, the notch tension in the Reduce intersection area 6. So overall it comes for a partial compensation of the occurring Voltages so that the maximum voltage in Intersection area 6 is reduced.
- FIG. 2C shows a section along the line B-B from FIG. 2 B. This results in the course of the bulges 8 in Longitudinal direction of the valve chamber 3.
- the bulges 8 focus on the area of the inlet opening 7 and take on both sides in the longitudinal direction of the valve chamber 3 off again, so that the valve chamber 3 there its original takes cylindrical shape again.
- FIG. 3 Another embodiment of the invention is shown in FIG. 3 shown schematically.
- the eccentric The arrangement of the inlet bore 2 has this Embodiment as a further strength-increasing Measure proven.
- the invention can be different Geometries of valve chamber cross sections in the area of Inlet opening to be specified, leading to a reduction the stresses occurring in the intersection area and thus to an increase in the high pressure resistance of the Guide injector body. Especially at High-pressure fuel injectors can be used with it Achieve success.
Landscapes
- 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
Description
- Fig. 1
- den Schnitt durch die Längsachse eines Injektorkörpers für ein Kraftstoff-Hochdruckeinspritzsystem,
- Fig. 2 A
- einen erfindungsgemäßen Injektorkörper in stark schematisierter Form im Längsschnitt,
- Fig. 2 B
- den Schnitt durch die Linie A-A aus Fig. 2 A,
- Fig. 2 C
- den Schnitt durch die Linie B-B aus Fig. 2 B und
- Fig. 3
- eine weitere Ausführungsform des erfindungsgemäßen Injektorkörpers in der gleichen Darstellung wie Fig. 3.
Claims (6)
- Injektorkörper für ein Kraftstoffeinspritzsystem, wobei der Injektorkörper (1) einen im wesentlichen zylindrisch geformten Ventilraum (3) aufweist, in den über eine Zulaufbohrung (2), die in einer Zulauföffnung (7) im Ventilraum (3) mündet, Kraftstoff unter Hochdruck einleitbar ist,
dadurch gekennzeichnet, daß der Ventilraum (3) zumindest im Bereich der Zulauföffnung (7) jeweils in Umfangsrichtung benachbart zur Zulauföffnung (7) eine Ausbuchtung (8) seines Querschnitts aufweist. - Injektorkörper nach Anspruch 1, dadurch gekennzeichnet, daß die Ausbuchtungen (8) symmetrisch zur Mittellinie der Zulaufbohrung (2) liegen.
- Injektorkörper nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sich die Ausbuchtung (8) bis zu einer Ebene (9), die parallel zur Längsachse (10) des Ventilraums (3) und durch die Zulauföffnung (7) hindurch verläuft, oder über diese Ebene (9) hinaus erstreckt.
- Injektorkörper nach Anspruch 3, dadurch gekennzeichnet, daß beide Ausbuchtungen (8) sich symmetrisch und gleichmäßig bis zur Ebene (9) erstrecken, so daß die Breite des Ventilraumquerschnitts im Bereich der Ausbuchtungen (8) dem Innendurchmesser des zylindrischen Ventilraums (3) entspricht.
- Injektorkörper nach Anspruch 4, dadurch gekennzeichnet, daß die Zulaufbohrung (2) exzentrisch zum Ventilraum (3) angeordnet ist.
- Injektorkörper nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß in Längsrichtung des Ventilraums (3) über den Bereich der Zulauföffnung (7) die Ausbuchtungen (8) zu einer konstanten Querschnitterweiterung des Ventilraums (3) führen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10152230 | 2001-10-20 | ||
DE10152230A DE10152230A1 (de) | 2001-10-20 | 2001-10-20 | Hochdruckfester Injektorkörper |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1304476A2 true EP1304476A2 (de) | 2003-04-23 |
EP1304476A3 EP1304476A3 (de) | 2004-05-19 |
EP1304476B1 EP1304476B1 (de) | 2011-09-14 |
Family
ID=7703405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02015756A Expired - Lifetime EP1304476B1 (de) | 2001-10-20 | 2002-07-13 | Hochdruckfester Injektorkörper |
Country Status (4)
Country | Link |
---|---|
US (1) | US6796512B2 (de) |
EP (1) | EP1304476B1 (de) |
JP (1) | JP4227393B2 (de) |
DE (1) | DE10152230A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010012393A1 (de) * | 2008-07-29 | 2010-02-04 | Robert Bosch Gmbh | Ventilgehäuse |
WO2012103899A1 (de) * | 2011-02-01 | 2012-08-09 | Robert Bosch Gmbh | Gehäuse eines druckbelasteten bauteils |
EP2960486A1 (de) * | 2014-06-25 | 2015-12-30 | Robert Bosch Gmbh | Verfahren zur reduzierung der spannung an einer verschneidung zweier ineinander einmündenden kanäle |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007018471A1 (de) | 2007-04-19 | 2008-10-23 | Robert Bosch Gmbh | Verschneidungsbereich zwischen einer Hochdruckkammer und einem Hochdruckkanal |
DE102008040383A1 (de) | 2008-07-14 | 2010-01-21 | Robert Bosch Gmbh | Hochdruckfester Kraftstoffinjektor |
DE102011101770A1 (de) * | 2011-05-17 | 2012-08-02 | L'orange Gmbh | Anordnung mit einem Festkörper sowie einer darin gebildeten Verschneidung zweier Hochdruck-Fluidkanäle |
AT512893B1 (de) * | 2013-02-05 | 2013-12-15 | Bosch Gmbh Robert | Bauelement mit ineinandermündenden Hochdruckbohrungen |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0449662A1 (de) * | 1990-03-29 | 1991-10-02 | Cummins Engine Company, Inc. | Kraftstoffeinspritzdüse und Verfahren zum Entlasten von Spannungskonzentration in einer Einspritzdüsenbohrung |
EP0717227A2 (de) * | 1994-12-16 | 1996-06-19 | Perkins Limited | Verfahren zur Verminderung der Spannung in Abzweigungen in einem Hochdruckströmungskanalsystem, und dadurch gebildete Abzweigung |
DE19826719A1 (de) * | 1998-06-16 | 1999-12-23 | Bosch Gmbh Robert | Ventilsteuereinheit für ein Kraftstoffeinspritzventil |
DE10022378A1 (de) * | 2000-05-08 | 2001-11-22 | Bosch Gmbh Robert | Hochdruckfester Injektorkörper |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4709679A (en) * | 1985-03-25 | 1987-12-01 | Stanadyne, Inc. | Modular accumulator injector |
KR880005354A (ko) * | 1986-10-08 | 1988-06-28 | 나까무라 겐조 | 전자 작동기 |
JP3750126B2 (ja) * | 1996-03-26 | 2006-03-01 | 株式会社デンソー | 燃料噴射弁 |
US5755190A (en) * | 1996-11-18 | 1998-05-26 | Ronen; Avner | Reciprocating machine with cooling jacket |
JP3939864B2 (ja) * | 1998-08-27 | 2007-07-04 | ヤマハ発動機株式会社 | 筒内噴射式エンジン |
US6598592B2 (en) * | 2000-10-04 | 2003-07-29 | Seimens Automotive Corporation | Fuel system including a fuel injector internally mounted to a fuel rail |
-
2001
- 2001-10-20 DE DE10152230A patent/DE10152230A1/de not_active Withdrawn
-
2002
- 2002-07-13 EP EP02015756A patent/EP1304476B1/de not_active Expired - Lifetime
- 2002-10-21 US US10/274,106 patent/US6796512B2/en not_active Expired - Fee Related
- 2002-10-21 JP JP2002306325A patent/JP4227393B2/ja not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0449662A1 (de) * | 1990-03-29 | 1991-10-02 | Cummins Engine Company, Inc. | Kraftstoffeinspritzdüse und Verfahren zum Entlasten von Spannungskonzentration in einer Einspritzdüsenbohrung |
EP0717227A2 (de) * | 1994-12-16 | 1996-06-19 | Perkins Limited | Verfahren zur Verminderung der Spannung in Abzweigungen in einem Hochdruckströmungskanalsystem, und dadurch gebildete Abzweigung |
DE19826719A1 (de) * | 1998-06-16 | 1999-12-23 | Bosch Gmbh Robert | Ventilsteuereinheit für ein Kraftstoffeinspritzventil |
DE10022378A1 (de) * | 2000-05-08 | 2001-11-22 | Bosch Gmbh Robert | Hochdruckfester Injektorkörper |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010012393A1 (de) * | 2008-07-29 | 2010-02-04 | Robert Bosch Gmbh | Ventilgehäuse |
US8844902B2 (en) | 2008-07-29 | 2014-09-30 | Robert Bosch Gmbh | Valve housing |
WO2012103899A1 (de) * | 2011-02-01 | 2012-08-09 | Robert Bosch Gmbh | Gehäuse eines druckbelasteten bauteils |
US20140026983A1 (en) * | 2011-02-01 | 2014-01-30 | Robert Bosch Gmbh | Housing for a pressure-loaded component |
US9291278B2 (en) | 2011-02-01 | 2016-03-22 | Robert Bosch Gmbh | Housing for a pressure-loaded component |
EP2960486A1 (de) * | 2014-06-25 | 2015-12-30 | Robert Bosch Gmbh | Verfahren zur reduzierung der spannung an einer verschneidung zweier ineinander einmündenden kanäle |
Also Published As
Publication number | Publication date |
---|---|
JP2003139013A (ja) | 2003-05-14 |
US20030089793A1 (en) | 2003-05-15 |
DE10152230A1 (de) | 2003-04-30 |
EP1304476B1 (de) | 2011-09-14 |
US6796512B2 (en) | 2004-09-28 |
JP4227393B2 (ja) | 2009-02-18 |
EP1304476A3 (de) | 2004-05-19 |
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