EP2529101A1 - Einspritzvorrichtung mit reduzierten druckschwingungen - Google Patents
Einspritzvorrichtung mit reduzierten druckschwingungenInfo
- Publication number
- EP2529101A1 EP2529101A1 EP10793202A EP10793202A EP2529101A1 EP 2529101 A1 EP2529101 A1 EP 2529101A1 EP 10793202 A EP10793202 A EP 10793202A EP 10793202 A EP10793202 A EP 10793202A EP 2529101 A1 EP2529101 A1 EP 2529101A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- throttle
- injection device
- injection
- medium
- fuel
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 56
- 239000007924 injection Substances 0.000 title claims abstract description 56
- 230000010355 oscillation Effects 0.000 title description 7
- 239000000446 fuel Substances 0.000 claims abstract description 22
- 239000007921 spray Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000013016 damping Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 2
- 206010067482 No adverse event Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
-
- 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
- F02M2200/28—Details of throttles in fuel-injection apparatus
-
- 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
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
- F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
Definitions
- the present invention relates to an injector with reduced pressure oscillations during the injection process. Injectors are different from the prior art
- the known injectors comprise an actuator operable valve member, e.g. a valve needle, which releases an injection hole for injection and reseals after injection. Due to this occurring pressure oscillations in the fuel can result inaccuracies in the metering of fuel and also undesirable noise may occur.
- the fuel starts to flow out, so that the pressure drops in the area of the valve seat. Since the rest, located in the injector amount of fuel is initially still at a higher pressure level at rest, this pressure drop is in the form of a pressure wave upstream through the
- Fuel supply path continues.
- This pressure wave is reflected at cross-sectional changes or projections and it forms a pressure wave system within the valve. Because of these pressure oscillations, therefore, a pressure gradient between the valve seat and the environment, for example the intake manifold or combustion chamber, as a function of time also changes. This results in a fully open valve to a non-constant injection rate, whereby the metering accuracy is deteriorated.
- the pressure oscillations can also adversely affect the geometry of the fuel spray and the droplet diameter of the spray.
- due to the pressure fluctuations in the fuel spray greasy and leaner zones may occur, which may degrade combustion as well as exhaust gas performance.
- the pressure oscillations also lead to unwanted noise and can cause permanent damage to the components. Therefore, it would be desirable to have an injector which has the highest requirements for metering accuracy and noise performance.
- the injection device according to the invention for the injection of a medium with the features of claim 1 has the advantage that unwanted pressure waves are highly damped in the system, so that no adverse effects on the Zumessgenautechnik occur and no unwanted noise occurs. Thus, you can
- Injection device comprises a throttle, wherein a distance of the throttle from a spray hole of the injection device along a medium path has a length which corresponds to a wavelength of a natural frequency of
- Injection device corresponds.
- a natural frequency of the injection device is determined and then the throttle is positioned in the medium path such that the distance of the throttle to the spray hole corresponds to the wavelength of the natural frequency. In this way, an excellent damping can be achieved, so that the resulting when opening the injector
- the throttle is arranged in the injection device.
- the structure of the injection device is such that the injection device has a natural frequency such that the throttle can be arranged in the injection device.
- the throttle can be arranged in the injection device.
- Throttle provided as a separate component.
- the throttle is integrated in a component of the medium path, for example a housing component. As a result, the number of components can be reduced.
- the throttle is designed such that the throttle
- Ratio of length to passage diameter L / D of preferably 0.01 to 100, preferably 1 to 5 and particularly preferably 2 to 3.
- the passage diameter is the minimum passage cross section of the throttle. In particular, when the ratio of length to passage diameter is between 2 and 3, excellent damping can be achieved.
- the throttle is formed symmetrically to a central axis and / or symmetrical to a plane perpendicular to the central axis. This geometric shape also provides high damping.
- the throttle on the inlet side and the outlet side on a wide chamfer is more preferably, the throttle on the inlet side and the outlet side on a wide chamfer. This allows a streamlined flow through the throttle can be achieved.
- the chamfers on the inlet side and the outlet side are conical and more preferably the same
- the medium supply path is preferably formed between the injection hole and the throttle substantially rectilinear.
- substantially rectilinear here means a medium path whose
- the medium path thus has no large flow deflections. In this as straight as possible form of the medium supply path between the injection hole and the throttle excellent damping can be achieved.
- the injector according to the invention can in various applications, such as a direct injection or a
- Injector also independent of the medium and can be used for both diesel and gasoline or in the exhaust aftertreatment z.
- a shape of the valve element of the injection device can be freely selected and is, for example, a valve needle or a valve ball.
- Figure 1 is a schematic representation of an injection device
- FIG. 2 is a schematic sectional view of a throttle of
- Injection device 1 for fuel injection according to a preferred embodiment of the invention described in detail.
- the injection device 1 comprises an injector 5 (injection valve), which is connected to a pump 7 via a rail 6. From the pump to a spray hole 3 on the injector 5, a continuous fuel path 2 is provided. When the valve is open, a spray 8 exits the spray hole 3. Furthermore, the injection device 1 comprises a throttle 4, which is arranged in the fuel path 2.
- the throttle 4 is arranged at a position in the fuel path in this way, which corresponds to a wavelength of a natural frequency of the injection device 1.
- a distance from the injection hole 3 to the throttle 4 is indicated in Figure 1 by the reference numeral 9.
- the throttle 4 is arranged in the fuel path at a position corresponding to the wavelength of the natural frequency.
- the throttle 4 is arranged in the injector 5.
- the throttle 4 could also be arranged at a position outside the injector, for example in the rail 6.
- the determination of the natural frequency of the injector 1 is a
- the throttle is preferably arranged in the injector so that its position can be easily changed and then fixed at the correct position. This can for example be realized by providing a sleeve in which the throttle is slidably disposed.
- FIG. 2 shows a sectional view of the throttle 4.
- the throttle 4 is formed both symmetrically to a central axis X-X and symmetrical to a plane E, which is perpendicular to the central axis X-X.
- the arrows in Figure 2 indicate the direction of flow.
- a wide chamfer 10 or 1 1 are formed, which allow a flow-favorable flow through the throttle 4.
- the chamfers 10, 1 1 are conical and formed with the same geometry.
- the idea is thus taken up for the first time to carry out the positioning of the throttle as a function of the natural frequency of the system. This results in surprisingly excellent Damping properties, so that the inventive
- Injectors achieve excellent operating results in terms of metering accuracy and noise performance with only a small additional cost.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010001170A DE102010001170A1 (de) | 2010-01-25 | 2010-01-25 | Einspritzvorrichtung mit reduzierten Druckschwingungen |
PCT/EP2010/069030 WO2011088928A1 (de) | 2010-01-25 | 2010-12-07 | Einspritzvorrichtung mit reduzierten druckschwingungen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2529101A1 true EP2529101A1 (de) | 2012-12-05 |
EP2529101B1 EP2529101B1 (de) | 2021-09-29 |
Family
ID=43648717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10793202.2A Active EP2529101B1 (de) | 2010-01-25 | 2010-12-07 | Einspritzvorrichtung mit reduzierten druckschwingungen |
Country Status (8)
Country | Link |
---|---|
US (1) | US9279401B2 (de) |
EP (1) | EP2529101B1 (de) |
JP (1) | JP5409934B2 (de) |
KR (1) | KR101844747B1 (de) |
CN (1) | CN102725507B (de) |
BR (1) | BR112012017945A2 (de) |
DE (1) | DE102010001170A1 (de) |
WO (1) | WO2011088928A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103867367B (zh) * | 2013-11-07 | 2016-08-17 | 北京理工大学 | 一种阻容式高压共轨系统液力滤波器 |
JP7143715B2 (ja) | 2018-10-05 | 2022-09-29 | 株式会社デンソー | 燃料噴射弁およびエンジンシステム |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1403510A1 (de) * | 2002-09-30 | 2004-03-31 | Delphi Technologies, Inc. | Hochdruckkraftstoffeinspritzsystem mit Mitteln zur Dämpfung von Druckwellen |
WO2007012092A1 (de) * | 2005-07-28 | 2007-02-01 | Avl List Gmbh | Hydraulische vorrichtung mit zumindest einem druckspeicher |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3395371B2 (ja) * | 1994-07-06 | 2003-04-14 | 株式会社デンソー | 燃料噴射装置 |
DE19919432C2 (de) | 1999-04-29 | 2002-07-04 | Bosch Gmbh Robert | Common Rail Injektor |
JP3661555B2 (ja) * | 2000-03-16 | 2005-06-15 | 日産自動車株式会社 | 排気ガス浄化システム |
DE10023952A1 (de) * | 2000-05-16 | 2001-11-29 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
JP2002070695A (ja) * | 2000-08-31 | 2002-03-08 | Nissan Motor Co Ltd | 内燃機関のインジェクタ取付構造 |
US6499677B2 (en) * | 2000-12-29 | 2002-12-31 | Siemens Automotive Corporation | Modular fuel injector having a low mass, high efficiency electromagnetic actuator and having an integral filter and dynamic adjustment assembly |
DE10127932A1 (de) * | 2001-06-08 | 2002-12-19 | Bosch Gmbh Robert | Ventil zum Steuern von Fluiden sowie Verfahren zur Bestimmung von Drücken |
DE10333787A1 (de) * | 2003-07-24 | 2005-02-24 | Volkswagen Mechatronic Gmbh & Co. Kg | Pumpe-Düse-Vorrichtung |
JP2005155418A (ja) * | 2003-11-25 | 2005-06-16 | Honda Motor Co Ltd | 燃料噴射弁装置 |
DE102004024527A1 (de) * | 2004-05-18 | 2005-12-15 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung |
DE102005022698B4 (de) * | 2005-05-18 | 2017-08-10 | Schaeffler Technologies AG & Co. KG | Rückströmdrosselventil für eine Kraftstoffeinspritzvorrichtung einer Brennkraftmaschine |
FR2886350B1 (fr) * | 2005-05-26 | 2007-08-03 | Renault Sas | Procede d'amortissement d'ondes de pression et dispositif d'injection |
DE102005059169A1 (de) | 2005-12-12 | 2007-06-14 | Robert Bosch Gmbh | Kraftstoffinjektor mit direkt betätigbarem Einspritzventilglied |
JP4737013B2 (ja) * | 2006-02-20 | 2011-07-27 | 株式会社デンソー | コモンレール |
ATE416308T1 (de) * | 2006-03-23 | 2008-12-15 | Delphi Tech Inc | Befestigungsanordnung für einen injektor |
DE102006046898A1 (de) | 2006-10-04 | 2008-04-10 | Robert Bosch Gmbh | Drosselplatte für Magnetventil |
DE102007011789A1 (de) * | 2007-03-12 | 2008-09-18 | Robert Bosch Gmbh | Kraftstoffinjektor |
DE102007023384A1 (de) * | 2007-05-18 | 2008-11-20 | Robert Bosch Gmbh | Injektor für eine Kraftstoffeinspritzanlage |
DE102007043538A1 (de) | 2007-09-12 | 2009-03-19 | Robert Bosch Gmbh | Injektor mit hydraulischem Dämpfer |
JP5251266B2 (ja) * | 2008-06-03 | 2013-07-31 | いすゞ自動車株式会社 | 排気ガス浄化装置及び排気ガス浄化システム |
-
2010
- 2010-01-25 DE DE102010001170A patent/DE102010001170A1/de not_active Ceased
- 2010-12-07 WO PCT/EP2010/069030 patent/WO2011088928A1/de active Application Filing
- 2010-12-07 US US13/574,433 patent/US9279401B2/en not_active Expired - Fee Related
- 2010-12-07 EP EP10793202.2A patent/EP2529101B1/de active Active
- 2010-12-07 KR KR1020127019553A patent/KR101844747B1/ko active IP Right Grant
- 2010-12-07 JP JP2012550341A patent/JP5409934B2/ja active Active
- 2010-12-07 BR BR112012017945A patent/BR112012017945A2/pt not_active IP Right Cessation
- 2010-12-07 CN CN201080062317.8A patent/CN102725507B/zh active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1403510A1 (de) * | 2002-09-30 | 2004-03-31 | Delphi Technologies, Inc. | Hochdruckkraftstoffeinspritzsystem mit Mitteln zur Dämpfung von Druckwellen |
WO2007012092A1 (de) * | 2005-07-28 | 2007-02-01 | Avl List Gmbh | Hydraulische vorrichtung mit zumindest einem druckspeicher |
Non-Patent Citations (1)
Title |
---|
See also references of WO2011088928A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20130037631A1 (en) | 2013-02-14 |
BR112012017945A2 (pt) | 2016-05-03 |
EP2529101B1 (de) | 2021-09-29 |
DE102010001170A1 (de) | 2011-07-28 |
JP5409934B2 (ja) | 2014-02-05 |
CN102725507A (zh) | 2012-10-10 |
JP2013518208A (ja) | 2013-05-20 |
US9279401B2 (en) | 2016-03-08 |
WO2011088928A1 (de) | 2011-07-28 |
KR20120116447A (ko) | 2012-10-22 |
CN102725507B (zh) | 2015-09-23 |
KR101844747B1 (ko) | 2018-04-03 |
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