WO2013033737A1 - VERSCHLEIßOPTIMIERTE HERSTELLUNG VON KONISCHEN SPRITZLÖCHERN - Google Patents
VERSCHLEIßOPTIMIERTE HERSTELLUNG VON KONISCHEN SPRITZLÖCHERN Download PDFInfo
- Publication number
- WO2013033737A1 WO2013033737A1 PCT/AT2012/000223 AT2012000223W WO2013033737A1 WO 2013033737 A1 WO2013033737 A1 WO 2013033737A1 AT 2012000223 W AT2012000223 W AT 2012000223W WO 2013033737 A1 WO2013033737 A1 WO 2013033737A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- injection
- hole
- injection nozzle
- spray
- injection hole
- Prior art date
Links
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
- 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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent
-
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
-
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8076—Fuel injection apparatus manufacture, repair or assembly involving threaded members
-
- 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
- F02M2200/9053—Metals
- F02M2200/9061—Special treatments for modifying the properties of metals used for fuel injection apparatus, e.g. modifying mechanical or electromagnetic properties
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49405—Valve or choke making
- Y10T29/49426—Valve or choke making including metal shaping and diverse operation
Definitions
- the invention relates to a method for producing spray holes in fuel injection nozzles for internal combustion engines, in which at least one production step for forming the spray hole and at least one curing step are performed.
- the invention further relates to a fuel injection nozzle for internal combustion engines, which has at least one injection hole.
- Fuel injectors consist of the nozzle body and the nozzle needle, both made of high quality steel.
- the nozzle needle is arranged axially displaceable in the nozzle body and has at its combustion-chamber-side end a conical valve sealing surface. With this conical valve sealing surface, the nozzle needle cooperates with a conical valve seat surface arranged at a closed end of a bore in the nozzle body, wherein a sealing cross section is formed at the contact line between valve sealing surface and valve seat surface.
- injection holes arranged downstream of the nozzle body are arranged, which, starting from the bore in the nozzle body, open at its outer circumferential surface and protrude into the combustion chamber of the internal combustion engine to be supplied.
- these spray holes may be formed, for example, conical, with the cross section of the injection holes from a relatively large diameter at the fuel inlet to a relatively small diameter at the fuel outlet uniformly reduced conically.
- the hole nozzles described above are used in directly injecting diesel engines, especially in common-rail systems. Where they atomize the fuel under very high pressure in a sharp injection jet on the walls of the opposite piston recess.
- the nozzle body usually has a plurality of injection holes, which form a uniform hole circle on the jacket of a cone inside the nozzle. Depending on the engine, the number of spray holes is between 5 (for cars) and 14 (for large diesel engines). The hole diameter varies between 0.15 mm (for cars) and 0.4 mm (for trucks).
- the number of spray holes, the spray hole angle and the spray hole size and the flow conditions at the nozzle holes affect the injection jet and its atomization.
- the respective spray pattern together with other factors such as the injection quantity, the injection pressure, the pressure profile, the combustion chamber geometry, the compression pressure and the compression temperature determines the combustion quality during the combustion of the diesel fuel.
- the spray holes are exposed to very high mechanical loads.
- wear mechanisms such as e.g. Cavitation or particle erosion can lead to rapid wear progress and thus to changes in the injection beam shape, the beam propagation or the mass flow rate.
- these changes can well lead to engine damage and thus to failure.
- the injection holes can be made by drilling or punching.
- the shape of injection ports made in this way is almost cylindrical according to the design of the drilling or punching tool.
- These production methods offer the possibility of giving the injection ports different geometries, such as, for example, conically executed injection holes, which usually decrease in diameter in the flow direction. But there are many more geometries known.
- the injection hole is formed using at least one abrasive manufacturing process and that the injection nozzle is then subjected at least in the spray hole of a curing treatment, so that the Spray hole surface is cured over its entire axial length.
- the invention thus relates to the production process in the production of specifically shaped spray holes, So those who by ablative manufacturing processes, such as eroding, lasers or similar. be made.
- the essence of the invention is now to make the order of the steps of introducing the hole and the curing so as to apply the shaping injection-hole production methods such as erosion or laser each before the responsible for the wear protection heat treatment.
- the injection holes are thus brought into the so-called soft state and can produce different spray-hole geometries, primarily conical geometries, with the ablation-producing production methods known per se, and nevertheless achieve wear resistance, strength and corrosion resistance in the spray-hole surface. Namely, the hardening treatment is performed only after the molding of the injection hole, so that the spray hole surface can be cured over its entire axial length.
- the curing treatment is carried out so that the spray hole surface is hardened uniformly over its entire axial length.
- the injection hole is conical or comprises a conical region.
- the diameter of the injection hole in the direction of flow decreases steadily.
- the injection hole is produced by erosion or laser machining.
- a method for eroding spray holes is described for example in DE 10360080 AI.
- the curing treatment comprises surface hardening.
- the hardening treatment comprises in particular a nitriding step or a heat treatment step, in particular case hardening.
- a particularly efficient procedure provides that the injection hole is formed in the uncured material of the injection nozzle.
- the inventive method is suitable for the processing of various materials, especially steels.
- the injection hole is preferably formed in an injection nozzle produced by hot isostatic pressing.
- a fuel injection nozzle for internal combustion engines which has at least one injection hole, wherein the injection hole has a shape deviating from a cylinder and the area of the spray hole and the spray hole surface is cured over its entire axial length.
- the spray hole surface is cured uniformly over its entire axial length.
- the injection hole may advantageously be conical or comprise a conical region.
- the diameter of the injection hole in the flow direction preferably increases steadily.
- FIG. 2 a and FIG. 2 b show a detailed view of the region II of FIG. 1, FIG. 2 a showing an embodiment produced according to the invention and FIG. 2 b showing a state of the art Technology produced execution shows.
- FIG. 1 schematically shows the structure of a common rail injector consisting of a high pressure accumulator 1, a servo valve 2, a throttle plate 3, and an injection nozzle 4.
- the Ser- voventil 2 closes in the idle state existing in the throttle plate 3 outlet throttle 5. This is in the control chamber 8, which is connected via the high-pressure bore 7 and the inlet throttle 6 to the memory 1, the system pressure, so that the nozzle needle 10 against the nozzle body 9 finished nozzle seat 11 is pressed and the injection holes 12 are closed.
- the outlet throttle 5 Upon actuation of the servo valve 2, the outlet throttle 5 is released, and the fuel located in the control chamber reduces its pressure in the low-pressure system (not shown) from. At the same time, high-pressure fuel flows via the inlet throttle 6.
- outlet throttle 5 and inlet throttle 6 are matched to one another such that upon actuation of the servo valve 2, the pressure in the control chamber 8 drops so far that the force acting on the lower part of the nozzle needle 10 pressure in the nozzle chamber 13, the nozzle needle 10 against the pressure in the control chamber 8 and against the force of the nozzle spring 14 presses out of the nozzle seat 11 and the injection holes 12 are released, so that fuel is injected into the combustion chamber 15. After closing the servo valve 2, fuel can no longer flow out of the control chamber 8 via the outlet throttle 5, so that the pressure built up here presses the nozzle needle 10 back into the nozzle seat 11.
- the injection holes 12 can be seen better.
- the nozzle needle is not shown for clarity.
- Denoted at 16 is a near-surface region that has been cured by a curing treatment.
- the result of a prior art procedure is shown in Fig. 2b.
- the injection nozzle 4 was first hardened, and only after that the injection holes 12 were inserted so that the injection hole surface 17 was not hardened.
- the injection holes were first produced. and then made the curing treatment, so that the spray hole surface 17 was also cured.
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
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014527433A JP2014525535A (ja) | 2011-09-06 | 2012-08-28 | 摩耗を最適化した円錐形噴射孔の製造 |
CN201280043096.9A CN103764999A (zh) | 2011-09-06 | 2012-08-28 | 锥形喷孔的磨损优化的制造 |
RU2014113166/06A RU2014113166A (ru) | 2011-09-06 | 2012-08-28 | Изготовление оптимизированных по износу конических распылительных отверстий |
US14/342,934 US20150083829A1 (en) | 2011-09-06 | 2012-08-28 | Wear-Optimised Production of Conical Injection Holes |
EP12756065.4A EP2753821A1 (de) | 2011-09-06 | 2012-08-28 | VERSCHLEIßOPTIMIERTE HERSTELLUNG VON KONISCHEN SPRITZLÖCHERN |
KR1020147005937A KR20140062482A (ko) | 2011-09-06 | 2012-08-28 | 원추형 분사 홀의 마모 최적화된 제조 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA1269/2011 | 2011-09-06 | ||
ATA1269/2011A AT511880B1 (de) | 2011-09-06 | 2011-09-06 | Verschleissoptimierte herstellung von konischen spritzlöchern |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013033737A1 true WO2013033737A1 (de) | 2013-03-14 |
Family
ID=46801254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2012/000223 WO2013033737A1 (de) | 2011-09-06 | 2012-08-28 | VERSCHLEIßOPTIMIERTE HERSTELLUNG VON KONISCHEN SPRITZLÖCHERN |
Country Status (8)
Country | Link |
---|---|
US (1) | US20150083829A1 (de) |
EP (1) | EP2753821A1 (de) |
JP (1) | JP2014525535A (de) |
KR (1) | KR20140062482A (de) |
CN (1) | CN103764999A (de) |
AT (1) | AT511880B1 (de) |
RU (1) | RU2014113166A (de) |
WO (1) | WO2013033737A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10935366B2 (en) | 2014-12-12 | 2021-03-02 | Werth Messtechnik Gmbh | Method and device for measuring features on workpieces |
DE102015121582A1 (de) | 2014-12-12 | 2016-06-16 | Werth Messtechnik Gmbh | Verfahren und Vorrichtung zur Messung von Merkmalen an Werkstücken |
DK178427B1 (en) * | 2015-04-29 | 2016-02-22 | Hans Jensen Lubricators As | Lubricant injector for large slow-running two-stroke engine and production method |
DK179113B1 (en) | 2015-04-29 | 2017-11-06 | Hans Jensen Lubricators As | Lubricant injector for large slow-running two-stroke engine and production method |
GB2545195A (en) * | 2015-12-08 | 2017-06-14 | Delphi Int Operations Luxembourg Sarl | Fuel injection nozzle |
DE102016203261A1 (de) * | 2016-02-29 | 2017-08-31 | Robert Bosch Gmbh | Verfahren zum Herstellen einer Bohrung, Bauteil und Kraftstoffinjektor |
US20200025060A1 (en) * | 2018-07-19 | 2020-01-23 | GM Global Technology Operations LLC | Fuel Injector and Nozzle Passages Therefor |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0404407A1 (de) * | 1989-06-23 | 1990-12-27 | Lucas Industries Public Limited Company | Kraftstoffeinspritzdüse |
EP0982493A1 (de) * | 1998-08-27 | 2000-03-01 | Wärtsilä NSD Schweiz AG | Verfahren zum Herstellen einer Brennstoffeinspritzdüse und Brennstoffeinspritzdüse |
DE19925380A1 (de) * | 1999-06-02 | 2000-12-07 | Volkswagen Ag | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE10360080A1 (de) | 2003-12-20 | 2005-07-21 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Abtragen von metallischem Material eines Werkstücks |
DE102004018937A1 (de) * | 2004-04-20 | 2005-11-17 | Robert Bosch Gmbh | Brennstoffeinspritzventil und Verfahren zu dessen Herstellung |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4801095A (en) * | 1985-08-10 | 1989-01-31 | Robert Bosch Gmbh | Fuel injection nozzle for internal combustion engines |
DE29713628U1 (de) * | 1997-07-31 | 1998-11-26 | Robert Bosch Gmbh, 70469 Stuttgart | Kraftstoffeinspritzdüse |
DE19847460A1 (de) * | 1998-10-15 | 2000-04-20 | Bosch Gmbh Robert | Kraftstoffeinspritzdüse für selbstzündende Brennkraftmaschinen |
ATE388322T1 (de) * | 2002-04-11 | 2008-03-15 | Waertsilae Nsd Schweiz Ag | Düsenkopf für eine brennstoffeinspritzdüse |
KR100810437B1 (ko) * | 2007-10-23 | 2008-03-04 | 이명배 | Hip 공법을 이용한 연료 분사 노즐용 소재의 제조방법 |
US20090294416A1 (en) * | 2008-05-28 | 2009-12-03 | Caterpillar Inc. | Laser manufacturing system having real-time feedback |
US8322004B2 (en) * | 2009-04-29 | 2012-12-04 | Caterpilar Inc. | Indirect laser induced residual stress in a fuel system component and fuel system using same |
-
2011
- 2011-09-06 AT ATA1269/2011A patent/AT511880B1/de not_active IP Right Cessation
-
2012
- 2012-08-28 EP EP12756065.4A patent/EP2753821A1/de not_active Withdrawn
- 2012-08-28 CN CN201280043096.9A patent/CN103764999A/zh active Pending
- 2012-08-28 RU RU2014113166/06A patent/RU2014113166A/ru not_active Application Discontinuation
- 2012-08-28 JP JP2014527433A patent/JP2014525535A/ja active Pending
- 2012-08-28 US US14/342,934 patent/US20150083829A1/en not_active Abandoned
- 2012-08-28 WO PCT/AT2012/000223 patent/WO2013033737A1/de active Application Filing
- 2012-08-28 KR KR1020147005937A patent/KR20140062482A/ko not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0404407A1 (de) * | 1989-06-23 | 1990-12-27 | Lucas Industries Public Limited Company | Kraftstoffeinspritzdüse |
EP0982493A1 (de) * | 1998-08-27 | 2000-03-01 | Wärtsilä NSD Schweiz AG | Verfahren zum Herstellen einer Brennstoffeinspritzdüse und Brennstoffeinspritzdüse |
DE19925380A1 (de) * | 1999-06-02 | 2000-12-07 | Volkswagen Ag | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE10360080A1 (de) | 2003-12-20 | 2005-07-21 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Abtragen von metallischem Material eines Werkstücks |
DE102004018937A1 (de) * | 2004-04-20 | 2005-11-17 | Robert Bosch Gmbh | Brennstoffeinspritzventil und Verfahren zu dessen Herstellung |
Also Published As
Publication number | Publication date |
---|---|
AT511880A1 (de) | 2013-03-15 |
KR20140062482A (ko) | 2014-05-23 |
US20150083829A1 (en) | 2015-03-26 |
EP2753821A1 (de) | 2014-07-16 |
AT511880B1 (de) | 2013-12-15 |
CN103764999A (zh) | 2014-04-30 |
RU2014113166A (ru) | 2015-10-20 |
JP2014525535A (ja) | 2014-09-29 |
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