EP2428672A2 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
EP2428672A2
EP2428672A2 EP11174601A EP11174601A EP2428672A2 EP 2428672 A2 EP2428672 A2 EP 2428672A2 EP 11174601 A EP11174601 A EP 11174601A EP 11174601 A EP11174601 A EP 11174601A EP 2428672 A2 EP2428672 A2 EP 2428672A2
Authority
EP
European Patent Office
Prior art keywords
nozzle needle
fuel injector
injector according
actuator
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.)
Withdrawn
Application number
EP11174601A
Other languages
German (de)
English (en)
Other versions
EP2428672A3 (fr
Inventor
Hans-Christoph Magel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2428672A2 publication Critical patent/EP2428672A2/fr
Publication of EP2428672A3 publication Critical patent/EP2428672A3/fr
Withdrawn legal-status Critical Current

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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • F02M51/0617—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature having two or more electromagnets
    • F02M51/0621—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature having two or more electromagnets acting on one mobile armature
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/042—The valves being provided with fuel passages
    • 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
    • F02M61/1866—Valve seats or member ends having multiple cones
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic

Definitions

  • the invention relates to a fuel injector according to the preamble of claim 1.
  • Such a fuel injector is from the DE 10 2008 001 895 A1 known.
  • the known fuel injector whose nozzle needle is connected to two disk-shaped armature, which are arranged in operative connection with a plurality of magnetic actuators.
  • the arrangement of the armature and the magnetic actuators is in a central region of the housing of the fuel injector, in which the fuel injector simultaneously forms a high pressure chamber for the fuel.
  • the nozzle needle has an extension on the side opposite a valve seat surface of the nozzle needle, which protrudes into a low-pressure chamber of the injector housing.
  • the extension of the nozzle needle forms a pressure compensation surface, which is about half the size of the nozzle seat surface for forming the sealing seat of the nozzle needle on the valve seat surface.
  • the invention has the object, a fuel injector according to the preamble of claim 1 in such a way that the required closing or opening forces for actuating the nozzle needle are further reduced.
  • the nozzle needle has two sealing seats, which are arranged spaced apart in the axial direction of the nozzle needle and that between the two sealing seats, the at least one passage opening is formed. Due to the design of the two sealing seats, a substantially pressure-compensated nozzle needle is formed in which the hydraulic opening force is greatly reduced. Since the nozzle needle is almost balanced in force both in the closed and in the open position, it can therefore be moved with relatively little actuator force.
  • the two seat diameters of the sealing seats have an at least approximately equal diameter. As a result, an almost completely pressure balanced nozzle needle is generated.
  • the end of the nozzle needle facing second seat diameter has a slightly larger diameter than the other seat diameter.
  • the realization of the two sealing seats on the nozzle needle takes place in a structural configuration in that the nozzle needle has a radially encircling notch in the region between the two sealing seats, of which a portion of the notch forms the first sealing seat.
  • the opening or closing movement of the nozzle needle can also be influenced in a relatively simple manner if the nozzle needle is guided on the side facing the at least one passage opening in a guide section of the injector housing and if a throttle is formed in the region of the guide section.
  • actuators for actuating the nozzle needle basically all actuators used in such fuel injectors in question, with a Hubionate can be provided between the actuator and the nozzle needle.
  • a stroke ratio and a tolerance compensation can be achieved by a hydraulic coupling space. If a magnetic actuator is used in which the magnet armature is connected directly to the nozzle needle, a particularly simple and cost-effective design results.
  • the nozzle needle is connected to a magnet armature is that the armature is formed of permanent magnetic material and that the current direction of a cooperating with the armature actuator is reversible.
  • the nozzle needle with several Magnet armature is connected, which interact with a plurality of solenoid coils having actuators.
  • the actuators can either all act together in one direction, in particular an opening direction of the nozzle needle, or alternatively, some actuators can be provided for opening and some actuators for closing the nozzle needle.
  • the at least one actuator is designed as a piezoelectric actuator, which is coupled via a stroke translator with the nozzle needle.
  • the stroke translator has a path ratio of greater than four.
  • a first fuel injector 10 serves to inject fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injector 10 is part of a so-called common-rail system, in which each cylinder of the internal combustion engine is equipped with its own fuel injector 10.
  • the respective fuel injector 10 is connected via a high pressure line 11 to a rail 12.
  • the rail 12 is located under high pressure fuel, for example, has a pressure of more than 2000bar.
  • the fuel injector 10 in known and Therefore, not shown manner, a return line, can be returned to the not required by the fuel injector 10 fuel or leakage amount of fuel, for example to the tank of the motor vehicle.
  • the fuel injector 10 has a multi-part injector housing 15. On the combustion chamber of the internal combustion engine facing the end of the injector 15 has a particular multi-stepped blind hole 16, in the peripheral wall a plurality, preferably at equal angular intervals mutually arranged passage openings 17 are formed for metering or dispensing fuel.
  • the passage openings 17 within the injector 15 have connection with a high-pressure chamber 18 in which fuel under system pressure is stored.
  • the opening or closing of the passage openings 17 takes place by means of a pin-shaped nozzle needle 20.
  • the nozzle needle 20 is arranged in its longitudinal direction in the direction of the double arrow 21 up and down movable.
  • the nozzle needle 20 in the region of the passage openings 17 a radially encircling notch 26.
  • the notch 26 forms two obliquely arranged, each preferably flat conical surfaces 27, 28 from.
  • the notch 26 merges after the conical surface 28 into a conical tip 29.
  • a high pressure storage volume 31 is formed in the closed position of the nozzle needle 20.
  • the high-pressure storage volume 31 has a respective longitudinal bore 32 formed in the nozzle needle 20 and transverse bore 33 communicating with the high-pressure space 18.
  • the conical surface 27 forms in the closed position of the nozzle needle 20 with the conically encircling inner wall 34 of the injector 15 a first sealing seat 22 with the diameter d 1 .
  • a second sealing seat 36 between the nozzle needle 20 and the injector 15 is formed by the nozzle needle 20 in the transition region from the conical surface 27 to the tip 29 at a wall portion 37 below the plane of the passage openings 17.
  • the second sealing seat 36 has a diameter d 2 which corresponds at least approximately to the diameter d 1 of the first sealing seat 22.
  • the diameter d 1 of the first sealing seat 22 is slightly larger than the diameter d 2 of the second sealing seat 36.
  • both sealing seats 22 and 36 are formed simultaneously. It is also essential that the passage openings 17 viewed in the axial direction of the nozzle needle 20 between the two sealing seats 22 and 36 are located.
  • the nozzle needle 20 is guided in a guide section 38 of the injector housing 15.
  • the nozzle needle 20 has an enlarged diameter portion 39, which is guided in the guide portion 38.
  • the region 39 may be formed with a passage opening 40 through which fuel from the high-pressure chamber 18 reaches the area of the two sealing seats 22 and 36, wherein the passage bore 40 can be designed as a throttle.
  • the nozzle needle 20 is connected to two magnet armatures 42, 43, which are axially spaced from one another and, in the exemplary embodiment, are disk-shaped. These two magnet armatures 42, 43 cooperate with three actuators 45 to 47 which, in addition to a respective annular magnetic core 48 to 50, also have a magnetic coil 51 to 53.
  • the magnetic coils 51 to 53 are driven via electrical lines 54.
  • the three actuators 45 to 47 can be driven synchronously, for example, to increase the opening force on the nozzle needle 20, so that Of all three magnetic coils 51 to 53 on the two armature 42 and 43, a force in the opening direction of the nozzle needle 20 is generated.
  • a modified fuel injector 10a is shown.
  • the fuel injector 10a is different from that in the Fig. 1 shown fuel injector 10 substantially in that in the high-pressure chamber 18, only a single armature 56 is arranged, which cooperates with an actuator 57.
  • the actuator 57 is used in particular for generating the opening force on the nozzle needle 20a.
  • the armature 56 is made of permanent magnetic material, and that the current flow through the actuator 57 is reversible. In this case, both a closing force and an opening force on the nozzle needle 20 a is generated by means of the actuator 57 via the armature 56.
  • Fig. 4 is another, modified fuel injector 10b shown.
  • the fuel injector 10b differs from the fuel injectors 10 and 10a in that its nozzle needle 20b is not driven by magnetic actuators but by a piezoactuator 60.
  • the piezoactuator 60 shown only symbolically acts on the nozzle needle 20b preferably via a hydraulic stroke translator 61, wherein the stroke translator 61 has a stroke ratio of greater than four, ie that a stroke of the piezoactuator 60 is amplified by a factor of four and at the same time correspondingly reversed change in the lifting force . is increased.
  • the fuel injectors 10, 10a and 10b described so far can be modified or modified in many ways without departing from the spirit of the invention.
  • This consists in the use of a nozzle needle 20, 20a, 20b with two sealing seats 22, 36, between which the passage openings 17 for the fuel.
  • the two sealing seats 22 and 36 in this case cause an almost complete formation of the nozzle needle 20, 20a, 20b as a pressure-balanced nozzle needle 20, 20a, 20c.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
EP11174601A 2010-09-08 2011-07-20 Injecteur de carburant Withdrawn EP2428672A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010040401 DE102010040401A1 (de) 2010-09-08 2010-09-08 Kraftstoffinjektor

Publications (2)

Publication Number Publication Date
EP2428672A2 true EP2428672A2 (fr) 2012-03-14
EP2428672A3 EP2428672A3 (fr) 2013-03-06

Family

ID=45218142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11174601A Withdrawn EP2428672A3 (fr) 2010-09-08 2011-07-20 Injecteur de carburant

Country Status (2)

Country Link
EP (1) EP2428672A3 (fr)
DE (1) DE102010040401A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2746564A1 (fr) * 2012-12-21 2014-06-25 Continental Automotive GmbH Ensemble d'actionneur électromagnétique pour une soupape d'injection de fluide et procédé de fonctionnement d'une soupape d'injection de fluide
CN111237108A (zh) * 2020-03-12 2020-06-05 莆田市宏业精密机械有限公司 直接控制喷油嘴开关的高压共轨喷油器
WO2021008961A1 (fr) * 2019-07-17 2021-01-21 Robert Bosch Gmbh Injecteur de carburant
CN114352453A (zh) * 2022-01-24 2022-04-15 一汽解放汽车有限公司 一种共轨系统可变喷射速率喷射器、喷射控制方法和汽车
GB2616436A (en) * 2022-03-08 2023-09-13 Delphi Tech Ip Ltd Fuel injector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112177823B (zh) * 2020-11-26 2024-10-11 江苏海事职业技术学院 一种船舶共轨柴油机的电控喷油器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020079388A1 (en) * 2000-12-21 2002-06-27 Ye Tian Fuel injector nozzle with outwardly opening check valve
DE102005009148A1 (de) * 2005-03-01 2006-09-07 Robert Bosch Gmbh Kraftstoffinjektor mit direktgesteuertem Einspritzventilglied mit Doppelsitz
DE102008001895A1 (de) 2008-05-21 2009-11-26 Robert Bosch Gmbh Brennstoffeinspritzventil
EP2204570A1 (fr) * 2008-12-30 2010-07-07 Robert Bosch GmbH Injecteur de carburant

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602004004056T2 (de) * 2004-01-13 2007-11-15 Delphi Technologies, Inc., Troy Einspritzdüse
EP2239451B1 (fr) * 2009-03-30 2011-09-07 Wärtsilä Switzerland Ltd. Injecteur de carburant pour moteurs à combustion interne
DK2405127T3 (da) * 2010-07-07 2013-04-22 Waertsilae Switzerland Ltd Brændstofindsprøjtningsindretning til motorer med indvendig forbrænding

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020079388A1 (en) * 2000-12-21 2002-06-27 Ye Tian Fuel injector nozzle with outwardly opening check valve
DE102005009148A1 (de) * 2005-03-01 2006-09-07 Robert Bosch Gmbh Kraftstoffinjektor mit direktgesteuertem Einspritzventilglied mit Doppelsitz
DE102008001895A1 (de) 2008-05-21 2009-11-26 Robert Bosch Gmbh Brennstoffeinspritzventil
EP2204570A1 (fr) * 2008-12-30 2010-07-07 Robert Bosch GmbH Injecteur de carburant

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102114516B1 (ko) 2012-12-21 2020-06-18 콘티넨탈 오토모티브 게엠베하 유체 분사 밸브 및 유체 분사 밸브를 동작시키는 방법
WO2014095161A1 (fr) * 2012-12-21 2014-06-26 Continental Automotive Gmbh Ensemble actionneur électromagnétique pour un robinet d'injection de fluide et procédé pour faire fonctionner un robinet d'injection de fluide
KR20150097557A (ko) * 2012-12-21 2015-08-26 콘티넨탈 오토모티브 게엠베하 유체 분사 밸브를 위한 전자기 액추에이터 조립체 및 유체 분사 밸브를 동작시키는 방법
US9777685B2 (en) 2012-12-21 2017-10-03 Continental Automotive Gmbh Electromagnetic actuator assembly for a fluid injection valve and method for operating a fluid injection valve
EP2746564A1 (fr) * 2012-12-21 2014-06-25 Continental Automotive GmbH Ensemble d'actionneur électromagnétique pour une soupape d'injection de fluide et procédé de fonctionnement d'une soupape d'injection de fluide
WO2021008961A1 (fr) * 2019-07-17 2021-01-21 Robert Bosch Gmbh Injecteur de carburant
CN114402134A (zh) * 2019-07-17 2022-04-26 罗伯特·博世有限公司 燃料喷射器
CN114402134B (zh) * 2019-07-17 2023-07-18 罗伯特·博世有限公司 燃料喷射器
US12234795B2 (en) 2019-07-17 2025-02-25 Robert Bosch Gmbh Fuel injector
CN111237108A (zh) * 2020-03-12 2020-06-05 莆田市宏业精密机械有限公司 直接控制喷油嘴开关的高压共轨喷油器
CN114352453A (zh) * 2022-01-24 2022-04-15 一汽解放汽车有限公司 一种共轨系统可变喷射速率喷射器、喷射控制方法和汽车
CN114352453B (zh) * 2022-01-24 2023-01-10 一汽解放汽车有限公司 一种共轨系统可变喷射速率喷射器、喷射控制方法和汽车
GB2616436A (en) * 2022-03-08 2023-09-13 Delphi Tech Ip Ltd Fuel injector
GB2616436B (en) * 2022-03-08 2024-08-14 Phinia Delphi Luxembourg Sarl Fuel injector

Also Published As

Publication number Publication date
DE102010040401A1 (de) 2012-03-08
EP2428672A3 (fr) 2013-03-06

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