EP2027385A1 - Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine - Google Patents
Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschineInfo
- Publication number
- EP2027385A1 EP2027385A1 EP07718497A EP07718497A EP2027385A1 EP 2027385 A1 EP2027385 A1 EP 2027385A1 EP 07718497 A EP07718497 A EP 07718497A EP 07718497 A EP07718497 A EP 07718497A EP 2027385 A1 EP2027385 A1 EP 2027385A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- resonator
- injector
- line
- pressure line
- 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
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
- F02M47/02—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
-
- 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
-
- 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
- F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
- F02M2547/001—Control chambers formed by movable sleeves
Definitions
- the invention relates to a device for injecting fuel into the combustion chamber of an internal combustion engine with at least one high-pressure accumulator, an injector, at least one high-pressure accumulator and the injector connecting high-pressure line and a parallel to the high-pressure line between the injector and high-pressure accumulator resonator connected line, the high-pressure accumulator side has a resonator ,
- EP 1 217 202 A1 it is known from EP 1 217 202 A1 to arrange a check valve and a dissipation element in a parallel circuit in a high pressure bore (common rail) leading to an injector, whereby pressure oscillations cease to act more rapidly can be brought.
- a throttle reducing the cross-section of the injection line is known from DE 160 785 A1 at the connection point to the high-pressure line.
- Valves are self-oscillating systems and thus have a pronounced time behavior, which is undesirable in injection systems as an additional source of interference.
- As a mechanically moving elements valves are subject to tolerances and suffer in view of the high operating frequency under high signs of wear.
- the common rail itself is already the largest existing in the system damping volume. Although a substantial reduction of the pressure oscillations could be achieved by increasing the rail volume. The disadvantage, however, is that the system then becomes very sluggish and rapid pressure changes are no longer easily possible.
- a resonator line is connected in parallel to the high-pressure line between the injector and the high-pressure accumulator and has a resonator throttle on the high-pressure accumulator side.
- the present invention aims to improve a device for injecting fuel into the combustion chamber of an internal combustion engine by simple, constructive means, wherein the harmful for the individual components pressure oscillations are avoided or can be reduced as quickly as possible.
- the resonator is formed by a pressed-in in the high-pressure line bore insert, in particular in this formed. In this case, no separate hole for the resonator is required, so the production cost is significantly reduced. In addition, it is ensured in such a construction that the corresponding portions of the high-pressure line and the resonator line are the same length, so that after a reflection of the pressure waves at the point of connection to an extinction of the waves.
- the resonator line is preferably designed as a central bore in the insert.
- the cross sections of the insert and the high pressure line bore may have mutually different contours, so that between the insert and the wall of the high pressure line bore flow cross sections of the high pressure line are formed.
- preferably at least two, more preferably three circular segment flow cross-sections are provided.
- the flow cross section of the high pressure line should preferably correspond substantially to the flow cross section of the resonator line.
- the invention thus provides that the high-pressure line is divided by pressing an insert into two independent areas, one of which is equipped with a throttle, so that the pressure oscillations that occur at the nozzle seat, in both areas differently reflective and the reflected oscillations due to their phase offset almost cancel each other out.
- the function of the hydraulic system is mapped exactly like those without a throttle, since only the line vibrations are extinguished.
- the extinguishing mechanism is symmetrical to the formation mechanism, whereby all external influences, such as temperature, pressure, etc. are compensated.
- the length of the resonator line between the injector and the resonator throttle preferably corresponds substantially to the length of the high-pressure line between the injector and the inlet of the high-pressure line into the high-pressure accumulator.
- a further preferred development provides that the length of the resonator line between the injector and the resonator throttle and the length of the high-pressure line between the injector and the inlet of the high-pressure line into the pressure accumulator is in each case an integer multiple of the wavelength of the pressure oscillation induced by the injector.
- FIG. 1 schematically shows the structure of a common rail injector with a pressure oscillation damping according to a first 2 shows an enlarged view of the lower injector region
- FIG. 3 shows a modified embodiment of the pressure oscillation damping
- FIG. 4 shows a section along the line IV-IV of FIG. 3
- FIG. 5 shows the pressure curve in an injector according to the invention.
- FIG. 1 and 2 schematically show 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 servo valve 2 closes in the rest state existing in the throttle plate 3 outlet throttle. 5
- the system pressure is present in the control chamber 8, which is connected to the reservoir 1 via the high-pressure bore 7 and the inlet throttle 6, so that the nozzle needle 10 is pressed against the nozzle seat 11 produced in the nozzle body 9 and the spray holes 12 are closed .
- 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.
- a resonator is used. This consists of a resonator bore 16, which has the same length and the same diameter as the high-pressure bore 7, and a resonator throttle 17 which is attached to the memory-side end of the resonator bore 16 and connects it to the memory 1.
- the pressure pulse produced at the nozzle seat propagates via the nozzle chamber 13 into the high-pressure bore 7 and the resonator bore 16.
- FIGS. 3 and 4 show the embodiment of an injector according to the invention.
- the high-pressure line 7 which leads from the memory 1 via valve group 2 and throttle plate 3 to the injection nozzle 4
- an insert 18 is pressed. 4
- the cross section of the insert 18 is shown.
- the high-pressure bore itself is designed in the form of several identical circular segment sections 19.
- the resonator bore 16 In the axis of the insert 18 is the resonator bore 16, in which the resonator choke 17 is located at the memory end.
- the entire cross-sectional area of the circular segment sections 19 is the same size as the cross-sectional area of the resonator bore 16 and the diameter of the resonator bore 16 is four times as large as the diameter of the resonator throttle 17.
- FIG. 5 shows the course of the pressure 20 as a function of the time 21 in the nozzle chamber 13.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT10082006A AT501573B1 (de) | 2006-06-13 | 2006-06-13 | Hydraulische vorrichtung mit zumindest einem druckspeicher |
| AT0006507A AT503660B1 (de) | 2006-06-13 | 2007-01-12 | Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine |
| PCT/AT2007/000286 WO2007143768A1 (de) | 2006-06-13 | 2007-06-13 | Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2027385A1 true EP2027385A1 (de) | 2009-02-25 |
| EP2027385B1 EP2027385B1 (de) | 2010-03-31 |
Family
ID=38476151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07718497A Active EP2027385B1 (de) | 2006-06-13 | 2007-06-13 | Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7866300B2 (de) |
| EP (1) | EP2027385B1 (de) |
| JP (1) | JP4884529B2 (de) |
| AT (2) | AT503660B1 (de) |
| DE (1) | DE502007003315D1 (de) |
| WO (1) | WO2007143768A1 (de) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH702496B1 (de) | 2010-05-07 | 2011-07-15 | Liebherr Machines Bulle Sa | Hochdruckinjektor. |
| DE102010039051A1 (de) * | 2010-08-09 | 2012-02-09 | Robert Bosch Gmbh | Einspritzvorrichtung |
| AT509877B1 (de) * | 2010-11-02 | 2011-12-15 | Bosch Gmbh Robert | Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine |
| AT512439B1 (de) | 2012-01-26 | 2013-12-15 | Bosch Gmbh Robert | Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine |
| AT512437B1 (de) * | 2012-01-26 | 2014-03-15 | Bosch Gmbh Robert | Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine |
| DE102012204659A1 (de) * | 2012-03-22 | 2013-09-26 | Man Diesel & Turbo Se | Injektor für eine Kraftstoffversorgungsanlage einer Brennkraftmaschine sowie Kraftstoffversorgungsanlage |
| AT512960B1 (de) * | 2012-05-22 | 2014-03-15 | Bosch Gmbh Robert | Injektor eines modularen Common-Rail-Kraftstoffeinspritzsystems |
| GB2504315A (en) * | 2012-07-25 | 2014-01-29 | Gm Global Tech Operations Inc | I.c. engine common rail system with each fuel injector connected to the rail by two fuel delivery channels to reduce transient pressure wave propagation |
| US9644590B2 (en) | 2014-01-31 | 2017-05-09 | Cummins Inc. | Fuel injection pressure pulsation dampening system |
| DE102021200154A1 (de) | 2021-01-11 | 2022-07-14 | Robert Bosch Gesellschaft mit beschränkter Haftung | Kraftstoffeinspritzvorrichtung |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB925937A (en) * | 1959-06-05 | 1963-05-15 | Tatra Np | Improvements in and relating to fuel injection arrangements for compression-ignitionengines |
| DE2749589A1 (de) * | 1977-11-05 | 1979-05-10 | Schwarze Rigobert | Kaltbiege- verfahren und -vorrichtung zur herstellung von gekruemmten mantelrohrleitungen |
| DE3739937A1 (de) * | 1987-11-25 | 1989-06-08 | Man B & W Diesel Gmbh | Kraftstoffdruckleitung |
| DE4105168A1 (de) * | 1990-12-10 | 1992-06-11 | Man Nutzfahrzeuge Ag | Einspritzsystem fuer luftverdichtende brennkraftmaschinen |
| JPH0658223A (ja) * | 1992-08-06 | 1994-03-01 | Yanmar Diesel Engine Co Ltd | 内燃機関の燃料噴射ポンプ |
| US5896843A (en) * | 1997-11-24 | 1999-04-27 | Siemens Automotive Corporation | Fuel rail damper |
| JPH11200987A (ja) * | 1998-01-07 | 1999-07-27 | Toyota Autom Loom Works Ltd | 内燃機関の蓄圧式燃料噴射系の慣性過給システム |
| JP3365386B2 (ja) * | 2000-02-04 | 2003-01-08 | 日本電気株式会社 | ディスク装置の騒音低減機構 |
| US20020043249A1 (en) * | 2000-10-16 | 2002-04-18 | Ki-Ho Lee | Fuel rail with intergal dampening features |
| FR2818732B1 (fr) * | 2000-12-22 | 2004-05-28 | Renault | Procede d'amortissement des ondes de pression dans une ligne hydraulique, et dispositif d'injection a rampe commune mettant en oeuvre ce procede |
| JP2002235522A (ja) * | 2001-02-09 | 2002-08-23 | Komatsu Ltd | 排気消音装置 |
| US6601564B2 (en) * | 2001-09-26 | 2003-08-05 | Senior Investments Ag | Flexible fuel rail |
| DE10157135B4 (de) * | 2001-11-21 | 2004-03-11 | Man B & W Diesel Ag | Kraftstoffversorgungsanlage in Form eines Common-Rail-Systems einer Brennkraftmaschine mit mehreren Zylindern |
| DE10209527A1 (de) * | 2002-03-04 | 2003-09-25 | Bosch Gmbh Robert | Einrichtung zur druckmodulierten Formung des Einspritzverlaufes |
| JP3991756B2 (ja) * | 2002-04-17 | 2007-10-17 | トヨタ自動車株式会社 | 燃料噴射装置 |
| US6761150B2 (en) * | 2002-11-05 | 2004-07-13 | Millennium Industries Corp. | Fuel rail flow-feed pulse damper |
| DE10307871A1 (de) * | 2003-02-25 | 2004-09-02 | Robert Bosch Gmbh | Hochdruckleitung für eine Kraftstoffeinspritzanlage |
| US6827065B2 (en) | 2003-04-08 | 2004-12-07 | General Motors Corporation | Diesel injection system with dual flow fuel line |
| JP4392592B2 (ja) * | 2003-12-12 | 2010-01-06 | トヨタ自動車株式会社 | 排気消音装置 |
| JP4641387B2 (ja) * | 2004-06-01 | 2011-03-02 | 日産自動車株式会社 | 流体継手 |
| JP2006017090A (ja) * | 2004-07-05 | 2006-01-19 | Yamaha Motor Co Ltd | エンジン |
| JP4532222B2 (ja) * | 2004-09-22 | 2010-08-25 | 本田技研工業株式会社 | 小型艇の排気装置 |
| US7497202B2 (en) * | 2004-10-15 | 2009-03-03 | Robert Bosch Gmbh | Hydraulic damper element |
| US7681553B2 (en) * | 2007-08-10 | 2010-03-23 | Pulsco, Inc. | Nested three chambers, fluid pulsation dampener |
-
2007
- 2007-01-12 AT AT0006507A patent/AT503660B1/de active
- 2007-06-13 DE DE502007003315T patent/DE502007003315D1/de active Active
- 2007-06-13 AT AT07718497T patent/ATE462884T1/de active
- 2007-06-13 EP EP07718497A patent/EP2027385B1/de active Active
- 2007-06-13 WO PCT/AT2007/000286 patent/WO2007143768A1/de not_active Ceased
- 2007-06-13 JP JP2009514590A patent/JP4884529B2/ja not_active Expired - Fee Related
- 2007-06-13 US US12/308,403 patent/US7866300B2/en active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007143768A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US7866300B2 (en) | 2011-01-11 |
| JP4884529B2 (ja) | 2012-02-29 |
| US20100263626A1 (en) | 2010-10-21 |
| WO2007143768A1 (de) | 2007-12-21 |
| JP2009540196A (ja) | 2009-11-19 |
| EP2027385B1 (de) | 2010-03-31 |
| ATE462884T1 (de) | 2010-04-15 |
| AT503660A4 (de) | 2007-12-15 |
| AT503660B1 (de) | 2007-12-15 |
| DE502007003315D1 (de) | 2010-05-12 |
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