EP1979605A1 - Injecteur de carburant - Google Patents
Injecteur de carburantInfo
- Publication number
- EP1979605A1 EP1979605A1 EP06830145A EP06830145A EP1979605A1 EP 1979605 A1 EP1979605 A1 EP 1979605A1 EP 06830145 A EP06830145 A EP 06830145A EP 06830145 A EP06830145 A EP 06830145A EP 1979605 A1 EP1979605 A1 EP 1979605A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- leakage oil
- valve
- return line
- oil return
- fuel injector
- 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 title claims abstract description 23
- 238000002347 injection Methods 0.000 claims abstract description 10
- 239000007924 injection Substances 0.000 claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process 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
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/002—Arrangement of leakage or drain conduits in or from 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
- F02M2200/28—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
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means
-
- 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
- F02M2547/003—Valve inserts containing control chamber and valve piston
Definitions
- the invention relates to a fuel injector according to the preamble of patent claim 1.
- Diesel common rail systems including fuel injectors or their components are subject to high pressure loads during operation.
- the amount of pressure corresponds approximately to the injection pressures to be achieved in the engine.
- these pressures should be increased as much as possible.
- previous designs have reached their limits in their geometry design.
- leakage is discharged from the holding body via a leakage oil return line which extends in the holding body and opens into a separate low-pressure side space of the holding body.
- the fuel injector according to the invention for internal combustion engines with the characterizing features of claim 1 is used to increase pressure, cost reduction and quality improvement. It can be eliminated by the invention strength-reducing manufacturing process on the holding body.
- the burr formation due to the current construction in the region of the intersection of the leak oil pocket / leak oil groove is eliminated. This eliminates the operation of deburring, and eliminates several operations. Wall thickness problems are solved so that e.g. a longer and more robust valve tightening screw (more carrying aisles) can be used to tighten the holding body, which in turn allows for pressure increases.
- the construction of the invention simplifies the structure of the fuel injector and reduces the number of processing steps.
- an increase in the strength of the holding body and a pressure increase of the fuel injector are possible.
- FIG. 1 is an overall view of the fuel injector according to the invention
- FIG. 2 is a detailed view in the region of the valve piece of FIG. 1;
- FIG. 3 shows a second embodiment of the fuel injector according to the invention in a representation analogous to FIG. 2.
- the fuel injector 1 shown in Fig. 1 is arranged in a pressurized with high pressure injection line 2 of the fuel and protrudes into the combustion chamber of the engine to be supplied.
- a piston-shaped valve member (nozzle needle) 5 is slidably mounted with a conical valve sealing surface 6, which is pressed by a closing spring 7 against a conical valve seat 8 of the nozzle body 4 and closes the injection holes 9 provided there.
- the injection line 2 opens into the nozzle body 4 in an annular pressure chamber 10, from which an annular gap extending between the guide bore 3 and the nozzle needle 5 leads to the valve seat surface 8.
- the nozzle needle 5 has in the region of the pressure chamber 10 designed as a pressure shoulder control surface 11 to which the supplied via the injection line 2 fuel attacks in the opening direction of the nozzle needle 5.
- Valve piston 12 controlled which is axially displaceably guided in a guide bore 13 of a holding body 14 and with its one end to the valve sealing surface 6 facing away from the end face of the nozzle needle 5 acts axially.
- the valve piston 12 with a control surface 15 acting in the closing direction, limits in a valve piece 16 a control chamber 17, which is connected via a Z-axis.
- Throttle 18 is connected to the injection line 2. From the control chamber 17 is an A-throttle 19, which is connected via a trained example as a 2/2-way solenoid valve control valve 20 (valve closure member 21) with a low-pressure side Abêtraum 22. To remove leakage oil from the region of the holding body 13 is provided in the valve piece 16 a leakage oil return line 23 in the form of an axial through hole, which goes off from the low-pressure loaded guide bore 13 of the holding body 14 and extends into the discharge chamber 22.
- the holding body 14 can be made with a greater wall thickness, so that, for example, a longer and more robust valve clamping screw 24 (more carrying gears) can be used for clamping the valve member 16, which in turn allows pressure increases.
- the control surfaces 11, 14 and the closing spring 7 are designed so that when the control valve 20 is closed, i. at the same pressure in the pressure chamber 10 and the control chamber 17, the nozzle needle 5, the spray holes 9 closes.
- the Z-throttle 18 is smaller than the A-throttle 19, so that by opening the control valve 20 of the pressure prevailing in the control chamber 17 pressure is reduced via the Abêtraum 22 and the pressure prevailing in the pressure chamber 10 pressure is sufficient, the nozzle needle 5 against the effect of Aufzu juryn closing spring 7.
- the embodiment shown in Fig. 3 differs only in that here the leak oil return line 23 'not directly into the Abberichtraum 22, but - at the same hydraulic operation - laterally into an outer surface 25 of the valve member 16 opens and from there up to the low pressure side is performed.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006003040A DE102006003040A1 (de) | 2006-01-23 | 2006-01-23 | Kraftstoffinjektor |
PCT/EP2006/068952 WO2007082598A1 (fr) | 2006-01-23 | 2006-11-27 | Injecteur de carburant |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1979605A1 true EP1979605A1 (fr) | 2008-10-15 |
EP1979605B1 EP1979605B1 (fr) | 2009-06-24 |
Family
ID=37890906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06830145A Expired - Fee Related EP1979605B1 (fr) | 2006-01-23 | 2006-11-27 | Injecteur de carburant |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080283627A1 (fr) |
EP (1) | EP1979605B1 (fr) |
CN (1) | CN101360909B (fr) |
AT (1) | ATE434721T1 (fr) |
DE (2) | DE102006003040A1 (fr) |
WO (1) | WO2007082598A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009103080A (ja) * | 2007-10-24 | 2009-05-14 | Denso Corp | 燃料噴射弁 |
DE102014200581A1 (de) * | 2014-01-15 | 2015-07-16 | Robert Bosch Gmbh | Brennstoffeinspritzanlage mit einer Brennstoff führenden Komponente, einem Brennstoffeinspritzventil und einer Verbindungseinrichtung |
CN107035586B (zh) * | 2017-01-18 | 2023-01-03 | 哈尔滨工程大学 | 一种带液力反馈的微动态回油谐振式电控喷油器 |
CN108412653B (zh) * | 2018-03-30 | 2023-11-03 | 重油高科电控燃油喷射***(重庆)有限公司 | 一种共轨喷油器 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH495504A (de) * | 1968-08-28 | 1970-08-31 | Sopromi Soc Proc Modern Inject | Brennstoff-Einspritzventil mit elektromagnetischer Betätigung |
US6012644A (en) * | 1997-04-15 | 2000-01-11 | Sturman Industries, Inc. | Fuel injector and method using two, two-way valve control valves |
US5826802A (en) * | 1995-11-17 | 1998-10-27 | Caterpillar Inc. | Damped check valve for fluid injector system |
DE19641824A1 (de) * | 1996-10-10 | 1998-04-16 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE19947772A1 (de) * | 1999-10-05 | 2001-04-19 | Hermann Golle | Einspritzventil, insb. für Common-Rail-Einspritzsysteme |
DE10052604A1 (de) * | 2000-10-24 | 2002-05-02 | Bosch Gmbh Robert | Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine |
ITTO20010814A1 (it) * | 2001-08-14 | 2003-02-14 | Fiat Ricerche | Iniettore di combustibile per un motore endotermico e relativo metododi fabbricazione. |
DE10312913A1 (de) * | 2003-03-22 | 2004-10-07 | Robert Bosch Gmbh | Hubgesteuertes Kraftstoffeinspritzventil |
-
2006
- 2006-01-23 DE DE102006003040A patent/DE102006003040A1/de not_active Withdrawn
- 2006-11-27 WO PCT/EP2006/068952 patent/WO2007082598A1/fr active Application Filing
- 2006-11-27 DE DE502006004092T patent/DE502006004092D1/de active Active
- 2006-11-27 CN CN2006800516254A patent/CN101360909B/zh not_active Expired - Fee Related
- 2006-11-27 EP EP06830145A patent/EP1979605B1/fr not_active Expired - Fee Related
- 2006-11-27 US US12/096,501 patent/US20080283627A1/en not_active Abandoned
- 2006-11-27 AT AT06830145T patent/ATE434721T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2007082598A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE502006004092D1 (de) | 2009-08-06 |
WO2007082598A1 (fr) | 2007-07-26 |
EP1979605B1 (fr) | 2009-06-24 |
DE102006003040A1 (de) | 2007-07-26 |
CN101360909B (zh) | 2011-02-09 |
US20080283627A1 (en) | 2008-11-20 |
CN101360909A (zh) | 2009-02-04 |
ATE434721T1 (de) | 2009-07-15 |
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