EP1291519A2 - Injektorkörper mit tangentialem Druckanschluss - Google Patents
Injektorkörper mit tangentialem Druckanschluss Download PDFInfo
- Publication number
- EP1291519A2 EP1291519A2 EP02017582A EP02017582A EP1291519A2 EP 1291519 A2 EP1291519 A2 EP 1291519A2 EP 02017582 A EP02017582 A EP 02017582A EP 02017582 A EP02017582 A EP 02017582A EP 1291519 A2 EP1291519 A2 EP 1291519A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- injector body
- pipe socket
- inlet bore
- pressure pipe
- pressure
- 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.)
- Withdrawn
Links
- 239000000446 fuel Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 12
- 238000005553 drilling Methods 0.000 abstract 2
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 230000001154 acute effect Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 2
- 241000792859 Enema Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007920 enema Substances 0.000 description 1
- 229940095399 enema Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000003068 static effect Effects 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
- DE 196 50 865 A1 relates to a solenoid valve for controlling a fuel injection valve.
- a solenoid valve is proposed, the armature of which consists of several parts is formed and has an armature disk and an anchor bolt, which in one Slider is guided.
- a damping device is provided on the magnet armature. With such a device, the required short switching times of the solenoid valve are exactly observable and can be reproduced in operation.
- the solenoid valve is determined for use in injection systems with a high-pressure manifold (common rail).
- the strength eliminate the weak point in the injector body that determines the injector body.
- the intersection of the inlet bore and the ring channel is due to that in the injector body prevailing internal pressure and static installation / assembly forces, highest mechanical Exposed to stresses due to an inclined positioning of the inlet bore or their eccentric entry into the ring channel within the injector body considerably can be reduced.
- the internal pressure in the ring channel is the inlet bore in the pipe connection mechanical stress due to the introduction of force at the screwing point of the High pressure supply line exposed from the high pressure manifold.
- the pivoting of the pressure connection geometry or its offset relative to the axis of symmetry of the ring channel in an inflow position in the center relative to the axis of symmetry of the injector body can be achieved by a simple modification of the forged blank of the injector body can be implemented without additional manufacturing technology performing measures are necessary.
- Can according to one of the variants of the present invention particularly obtuse inlet angle of the inlet bore into the annular space achieved in the injector body, the strength gain is considerable. The duller the inlet angle of the inlet bore can be formed, the higher the gain in strength results on the injector body.
- FIG. 1 shows a series-produced injector body known from the prior art of a fuel injector in longitudinal section.
- FIG. 1 shows an injector body 1, in the upper one Area an external thread 2 is added.
- an external thread 2 On the external thread 2 is one here Magnetic sleeve, not shown, attached, which surrounds an electromagnet, which with which an actuating element, not shown here, also relieves pressure Control room, not shown, can be actuated.
- an installation space 4 is provided below the installation space 3 for recording of the solenoid valve, which is also not shown accommodates anchor arrangement configured in one or more parts.
- Below the installation space 4 shows an annular space 5, which is under extremely high pressure Fuel is applied.
- a guide section 6 for one in the illustration according to FIG. 1 likewise Tappet / nozzle needle arrangement, not shown.
- a Pressure pipe socket 7 added, which can be provided with an internal thread 8. In this can be screwed into a connector of a high pressure line, via which the injector body 1 of the fuel injector for injecting fuel into the Combustion chamber of an internal combustion engine with a feed line from the high-pressure collection chamber (Common Rail) is connected.
- Common Rail high-pressure collection chamber
- the fuel stored in the high-pressure manifold (common rail) is fed through a High pressure pump kept at a constant high pressure level, from the high pressure plenum (Common rail) the individual fuel injectors in injection sequence the internal combustion engine can be pressurized with fuel under high pressure are. Due to the high prevailing in the common rail Pressure, pressure pulsations in pressure fluctuations in the fuel are compensated for, so that on the individual, the combustion chambers of the internal combustion engine assigned A constant injection pressure is permanently present.
- An inlet bore 10 runs from the sealing surface 9 in the pressure pipe socket 7 in the direction on the annular space 5 in the injector body 1, which in the annular space 5 at an outlet point 12 flows.
- 1 shows that the inlet bore 10 at an angle 13, in the present case an acute angle 13, from the sealing surface 9 branches off and at an also acute angle 14 with respect to the axis of symmetry of the annular space 5 opens into the annular space 5.
- reference numeral 11 is the angle of inclination the sealing surface 9 formed in the pressure pipe socket 7 with respect to the axis of symmetry of the annulus 5 identified.
- FIG. 2 shows a cross section through the injector body as shown in FIG. 1 according to the section line II-II.
- the Inlet bore 10 extends in a length 23 from the sealing surface 9 of the pressure pipe socket 7 to extends to the wall of the annular space 5.
- the inlet bore 10 runs Sealing surface 9 inclined by an angle of inclination 21 in the direction of the annular space 5.
- Im Annulus 5 essentially opens the inlet bore 10 at an outlet point 12 one in the running angle 22, which, as shown in FIG. 2, is referred to as the right angle is.
- the inlet bore 10 thus opens approximately centrally in the annular space 5, which in the Area of the mouth 12 an area of reduced high pressure resistance due to selected mouth location results.
- the sharp-edged corners of the Inlet bore 10 in the area of the mouth 12 are due to the occurring Pressure loads exposed to the highest mechanical stresses.
- the line of symmetry 24 of the pressure port 7 runs the inlet bore 10 as shown 2 in an inclined position 25 with respect to the line of symmetry 24.
- Fig. 3 shows a in the pressure pipe socket of an injector body in relation to the one to be acted upon Annulus tangentially extending inlet bore 10.
- the inlet bore 10 is no longer in the middle (cf. illustration according to FIG. 2) opens into the annular space 5, but rather that the opening point 12 of the inlet bore 10 opens tangentially into the annular space 5.
- the slant the inlet bore 10 in the injector body 1 is characterized by the angle 25. According to the illustration in FIG. 3, there is a point in the area of the sealing surface 9 Angle 21 between the orientation of the sealing surface 9 in the pressure pipe socket 7 and the channel cross section of the inlet bore 10, which indicates a potential weak or Leak can represent.
- Fig. 4 shows an offset on the injector body to its axis of symmetry An inlet connector.
- the inlet bore 10 runs parallel to the axis of symmetry in the representation of the injector body 1 according to FIG. 4 of the pressure pipe socket and opens into the wall of the annular space 5 at the mouth 12 in a first obtuse entry angle 31.
- the mechanical load significantly reduced at the mouth 12 of the inlet bore in the annular space 5.
- the acute angle 21 shown in FIG. 3 is at which the angle shown there Inlet bore 10 branches off from the sealing surface 9, omitted.
- Another embodiment variant of the solution proposed according to the invention is the 5, the one on the injector body in a pivoted position arranged pressure pipe socket shows.
- the pivoted arrangement of the pressure pipe socket 7 in relation to the injector body 1 is designated by reference numeral 34.
- the inlet bore also runs according to this arrangement 10 with respect to the sealing surface 9 of the pressure pipe socket 7 perpendicular to this in Direction to the annular space 5 of the injector body 1.
- the inlet angle at the mouth 12 is designated by reference numeral 35, with the embodiment variant according to FIG Fig. 5 is a second obtuse inlet angle 35.
- the length of the inlet bore 10 between the sealing surface 9 and the mouth 12 much shorter.
- the axis of symmetry 33 of the inlet bore 10 and that of the pressure pipe socket fall 7 together.
- the inclination to the pressure pipe socket 7 or inlet bore 10 is in the second embodiment variant according to FIG. 5 due to the inclination angle 36, which is the angular offset between the line of symmetry 33 of inlet bore 10 and pressure pipe socket 7 and the horizontal with respect to the Annulus 5 of the injector body 1 denotes.
- the pressure pipe socket 7, which in the second 5 is pivoted relative to the injector body 1, can also take up an internal thread 8, on which a not shown here from High-pressure plenum screwed from the high-pressure line leading to the injector body 1 can be.
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
- Figur 1, 2
- eine aus dem Stand der Technik bekannte Injektorausführung in Längsund Querschnittdarstellung,
- Figur 3
- eine im Druckrohrstutzen eines Injektorkörpers verschwenkt aufgenommene Zulaufbohrung,
- Figur 4
- einen am Injektorkörper zu dessen Symmetrieachse versetzt angeordneten Druckrohrstutzen und
- Figur 5
- einen am Injektorkörper in geschwenkter Lage angeordneten Druckrohrstutzen.
- 1
- Injektorkörper
- 2
- Anschlussgewinde
- 3
- Bauraum für Magnetventil
- 4
- Einbauraum Ankeranordnung
- 5
- Ringkanal
- 6
- Düsennadel/Stößelführung
- 7
- Druckrohrstutzen
- 8
- Innengewinde
- 9
- Dichtfläche
- 10
- Zulaufbohrung
- 11
- Neigungswinkel Dichtfläche
- 12
- Mündungsstelle Zulaufbohrung Ringraum
- 13
- spitzer Winkeleinlauf Zulaufbohrung
- 14
- Mündungsstellenwinkel
- 20
- Umfangslage Mündung
- 21
- Neigungswinkel Dichtfläche
- 22
- rechter Winkel Mündung
- 23
- Länge Zulaufbohrung
- 24
- Symmetrielinie Druckrohrstutzen
- 25
- Schräglage
- 30
- Versatz Druckrohrstutzen-Injektorkörper
- 31
- erster stumpfer Einlaufwinkel
- 32
- Lage Zulaufbohrung
- 33
- Symmetrieachse Zulaufbohrung
- 34
- verschwenkter Druckrohrstutzen
- 35
- zweiter stumpfer Einlaufwinkel
- 36
- Schrägstellung
- 37
- Wandung Injektorkörper
- 38
- rechter Winkel
Claims (6)
- Kraftstoffinjektor zum Einspritzen von Kraftstoff in den Brennraum einer Verbrennungskraftmaschine, der einen Injektorkörper (1) umfasst, in welchem ein Ringraum (5) ausgebildet ist, in den eine Zulaufbohrung (10) an einer Mündungsstelle (12) mündet und am Injektorkörper (1) ein Druckrohrstutzen (7) mit einer Dichtfläche (9) ausgebildet ist, dadurch gekennzeichnet, dass der Druckrohrstutzen (7) zur Symmetrielinie des Ringraumes (5) versetzt angeordnet ist und die im Druckrohrstutzen (7) ausgeführte Zulaufbohrung (10) tangential in einem stumpfen Einlaufwinkel (31, 35) im Ringraum (5) an der Mündungsstelle (12) ausläuft.
- Kraftstoffinjektor gemäß Anspruch 1, dadurch gekennzeichnet, dass die Zulaufbohrung (10) im Druckrohrstutzen (7) senkrecht von der Dichtfläche (9) ausgehend zum Ringraum (5) verläuft.
- Kraftstoffinjektor gemäß Anspruch 1, dadurch gekennzeichnet, dass der Druckrohrstutzen (7) in einem seitlichen Versatz (30) zur Symmetrieachse des Ringraumes (5) angeordnet ist.
- Kraftstoffinjektor gemäß Anspruch 3, dadurch gekennzeichnet, dass die Symmetrieachse (33) der Zulaufbohrung (10) mit der Symmetrieachse des Druckrohrstutzens (7) zusammenfällt und die Zulaufbohrung (10) in einem ersten stumpfen Einlaufwinkel (31) im Ringraum (5) mündet.
- Kraftstoffinjektor gemäß Anspruch 1, dadurch gekennzeichnet, dass der Druckrohrstutzen (7) am Injektorkörper (1) um einen Schrägstellungswinkel (36) verschwenkt aufgenommen ist.
- Kraftstoffinjektor gemäß Anspruch 5, dadurch gekennzeichnet, dass die Zulaufbohrung (10) im verschwenkt angeordneten Druckrohrstutzen (7) in einem zweiten stumpfen Einlaufwinkel (35) im Ringraum (5) des Injektorkörpers (1) tangential mündet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10143947A DE10143947A1 (de) | 2001-09-07 | 2001-09-07 | Injektorkörper mit tangentialem Druckanschluss |
| DE10143947 | 2001-09-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1291519A2 true EP1291519A2 (de) | 2003-03-12 |
| EP1291519A3 EP1291519A3 (de) | 2004-02-25 |
Family
ID=7698090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02017582A Withdrawn EP1291519A3 (de) | 2001-09-07 | 2002-08-07 | Injektorkörper mit tangentialem Druckanschluss |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20030141386A1 (de) |
| EP (1) | EP1291519A3 (de) |
| JP (1) | JP2003106243A (de) |
| DE (1) | DE10143947A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1529954A1 (de) * | 2003-11-07 | 2005-05-11 | Denso Corporation | Druckspeicher mit schrägen Anschlussöffnungen |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5218583B2 (ja) * | 2011-03-09 | 2013-06-26 | 株式会社デンソー | インジェクタ |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19650865A1 (de) | 1996-12-07 | 1998-06-10 | Bosch Gmbh Robert | Magnetventil |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR760243A (fr) * | 1933-09-01 | 1934-02-19 | Dispositif d'injection de liquides pour moteurs à combustion ou à explosion | |
| US4565320A (en) * | 1982-03-15 | 1986-01-21 | Yanmar Diesel Engine Co. Ltd. | Unit injector of internal combustion engine |
| US4649887A (en) * | 1984-01-12 | 1987-03-17 | Nippon Soken, Inc. | Pump for supplying pressurized fuel to fuel injector of internal combustion engine |
| US4674462A (en) * | 1984-07-25 | 1987-06-23 | Orbital Engine Co. Proprietary, Ltd. | Air supply system for fuel injection system |
| DE3521428A1 (de) * | 1985-06-14 | 1986-12-18 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzvorrichtung fuer brennkraftmaschinen |
| DE3843879A1 (de) * | 1988-12-24 | 1990-06-28 | Bosch Gmbh Robert | Kraftstoff-einspritzduese fuer brennkraftmaschinen |
| US4987878A (en) * | 1989-06-21 | 1991-01-29 | Johnson Jerome V | Fuel injection system |
| DE4239173C1 (en) * | 1992-11-21 | 1993-09-02 | Mercedes-Benz Aktiengesellschaft, 70327 Stuttgart, De | Cylinder-head for fuel-injection engine - has pressure pipe passing through clamping screw and with union at protruding end for injection pipe |
| US5775303A (en) * | 1995-06-30 | 1998-07-07 | Cummins Engine Company, Inc. | High Pressure Fuel Line Connection |
| US6062497A (en) * | 1996-01-19 | 2000-05-16 | Caterpillar Inc. | Fuel injector nozzle assembly with improved needle check valve stop mechanism |
| DE19640480B4 (de) * | 1996-09-30 | 2004-04-22 | Robert Bosch Gmbh | Kraftstoffhochdruckspeicher |
| JPH10176783A (ja) * | 1996-10-18 | 1998-06-30 | Usui Internatl Ind Co Ltd | コモンレール |
| US5752487A (en) * | 1997-06-11 | 1998-05-19 | Caterpillar Inc. | Injector combustion gas seal |
| DE19736191A1 (de) * | 1997-08-20 | 1999-02-25 | Siemens Ag | Druckbehälter mit Anschlußbohrung |
| DE19832826C2 (de) * | 1998-07-21 | 2000-08-17 | Bosch Gmbh Robert | Montageverfahren für Kraftstoff-Einspritzventil und Vorsteuerventil sowie Kraftstoff-Einspritzventil |
| DE19949963A1 (de) * | 1999-10-16 | 2001-04-26 | Bosch Gmbh Robert | Verfahren zum Herstellen eines Kraftstoffhochdruckspeichers |
| LU90498B1 (fr) * | 1999-12-30 | 2001-07-02 | Art & S Automotie Technology & | Dispositif d'injection d'un carburant - l'int-rieur d'une chambre de combustion d'un cylindre d'un moteur - combustion interne |
| DE10022378A1 (de) * | 2000-05-08 | 2001-11-22 | Bosch Gmbh Robert | Hochdruckfester Injektorkörper |
| DE10132246A1 (de) * | 2001-07-04 | 2003-01-23 | Bosch Gmbh Robert | Kraftstoffinjektor mit hochdruckfestem Zulauf |
-
2001
- 2001-09-07 DE DE10143947A patent/DE10143947A1/de not_active Ceased
-
2002
- 2002-08-07 EP EP02017582A patent/EP1291519A3/de not_active Withdrawn
- 2002-09-04 JP JP2002259053A patent/JP2003106243A/ja active Pending
- 2002-09-09 US US10/236,925 patent/US20030141386A1/en not_active Abandoned
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19650865A1 (de) | 1996-12-07 | 1998-06-10 | Bosch Gmbh Robert | Magnetventil |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1529954A1 (de) * | 2003-11-07 | 2005-05-11 | Denso Corporation | Druckspeicher mit schrägen Anschlussöffnungen |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003106243A (ja) | 2003-04-09 |
| DE10143947A1 (de) | 2003-04-03 |
| US20030141386A1 (en) | 2003-07-31 |
| EP1291519A3 (de) | 2004-02-25 |
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Effective date: 20040826 |