EP1936180A2 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

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Publication number
EP1936180A2
EP1936180A2 EP07119028A EP07119028A EP1936180A2 EP 1936180 A2 EP1936180 A2 EP 1936180A2 EP 07119028 A EP07119028 A EP 07119028A EP 07119028 A EP07119028 A EP 07119028A EP 1936180 A2 EP1936180 A2 EP 1936180A2
Authority
EP
European Patent Office
Prior art keywords
storage
volume
fuel
fuel injection
injection valve
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
Application number
EP07119028A
Other languages
German (de)
English (en)
Other versions
EP1936180A3 (fr
EP1936180B1 (fr
Inventor
Matthias Burger
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 EP1936180A2 publication Critical patent/EP1936180A2/fr
Publication of EP1936180A3 publication Critical patent/EP1936180A3/fr
Application granted granted Critical
Publication of EP1936180B1 publication Critical patent/EP1936180B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
    • 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 injection valve for fuel injection systems of internal combustion engines. Specifically, the invention relates to an injector for fuel injection systems of air-compressing, self-igniting internal combustion engines.
  • the known injection valve has a multi-part valve housing which comprises a nozzle body, wherein within the nozzle body an onion-shaped nozzle volume is provided, in which there is high pressure fuel in operation, which is hosed when opening the valve needle via at least one nozzle opening. The filling of the nozzle volume takes place via a leading through the valve housing fuel channel.
  • the fuel injection valve according to the invention with the features of claim 1 has the advantage that possible hydraulic vibrations are advantageously damped.
  • the fuel injector of the invention may have a relatively large storage volume, with adverse side effects associated with such a large storage volume being prevented or at least reduced.
  • a nozzle volume is formed within the valve housing, which is connected to the second storage volume, wherein upon actuation of the valve closing body fuel from the nozzle volume on the opened sealing seat is sprayed off.
  • the nozzle volume can be configured onion-shaped.
  • the inflow of fuel can be made directly into the second storage sub-volume.
  • at least one further throttle is provided between the nozzle volume and the second storage partial volume, in order to enable a faster closing of a nozzle needle.
  • the supply of fuel may also be done directly into the first storage sub-volume connected to the second storage sub-volume via the throttle.
  • the connection between the second storage partial volume and the nozzle volume can also be at least substantially unthrottled.
  • the actuating device actuates the valve closing body by means of a hydraulic coupler having a control rod which limits the storage volume, and that the throttle, which connects the first storage part volume with the second storage part volume, through a throttle gap between the control rod and a in the Valve housing inserted annular disc is formed.
  • This has the advantage that the spatial division of the storage volume into the first storage subvolume and the second storage subvolume can be done by the annular disc, whereby a cost-effective and easy to implement design of the fuel injector is possible.
  • the annular disc can be pressed into the valve housing.
  • the actuating device actuates the valve closing body by means of a hydraulic coupler having a control chamber, that the control chamber is connected by means of a drain throttle with a return, the connection of the drain throttle is controlled with the return by the actuator, and that an inlet throttle is provided, which connects the first storage part volume with the control room.
  • the hydraulic coupler has a further control chamber, that an end face of the control rod limits the control chamber, that a further end face of the control rod limits the further control chamber and that the valve closing body in dependence on a pressure difference between the pressure of a fuel in the further Control chamber and a pressure of a fuel in a nozzle chamber is actuated.
  • the first storage part volume is formed by a first storage space
  • the second storage part volume is formed by a second storage space and that the second storage space is connected to a limited by the valve seat surface nozzle space.
  • Fig. 1 shows a first embodiment of a fuel injection valve 1 of the invention in a schematic, partial sectional view.
  • the fuel injection valve 1 can serve in particular as an injector for fuel injection systems of air-compressing, self-igniting internal combustion engines.
  • the fuel injection valve 1 is suitable for commercial vehicles or passenger cars.
  • a preferred use of the fuel injection valve 1 is for a fuel injection system with a common rail, the diesel fuel under high pressure leads to a plurality of fuel injection valves 1.
  • a mini-rail may be formed by the fuel injection valve 1, wherein the fuel injection valve 1 by a floating in the high pressure control rod 21, which may be designed needle-shaped, distinguished.
  • fuel injector 1 according to the invention is also suitable for other applications.
  • the fuel injection valve 1 has a valve housing 3, which is generally designed in several parts and, for example, may have a nozzle body.
  • the valve housing 3 has a valve seat body 4, on which a valve seat surface 5 is formed.
  • the valve seat surface 5 cooperates with a valve closing body 6 to form a sealing seat.
  • the valve closing body 6 is actuated by a nozzle needle 7, wherein the valve closing body 6 is formed in one piece with the nozzle needle 7 in the illustrated embodiment.
  • the nozzle needle 7 is guided by a valve needle guide 8 of the valve housing 3 in the axial direction.
  • the nozzle needle 7 may additionally be acted upon by a valve spring in the direction of the sealing seat formed by the valve closing body 6 and the valve seat surface 5 with a spring force.
  • valve housing 3 has a fuel inlet nozzle 10, shown in simplified form, in order to lead fuel from a high-pressure pump 11 into the fuel injection valve 1.
  • the connection of the fuel injection valve 1 with the high-pressure pump 11 can take place via a common rail.
  • the fuel is conducted to the fuel inlet port 10 in a fuel channel 12, which opens into a first storage space 13.
  • the first storage space 13 is formed inside the valve housing 3.
  • a second storage space 14 is provided, which is also provided within the valve housing 3.
  • the first storage space 13 forms a first storage partial volume and the second storage space 14 forms second storage partial volume, wherein the two storage partial volumes formed by the storage spaces 13, 14 define a storage volume 15. Due to the storage volume 15, the fuel injection valve 1 can act as a mini-rail.
  • the storage spaces 13, 14 are connected to each other via a throttle 16. Further, an unthrottled fuel passage 17 is provided, which connects the second storage part volume defined by the second storage space 14 to a nozzle volume formed by a nozzle space 18.
  • the nozzle needle 7 has a piston portion 20, on which the nozzle needle 7 is guided in the valve needle guide 8.
  • the fuel injection valve 1 also has a control rod 21 arranged in the valve housing 3, which is arranged partly in the first storage space 13 and partly in the second storage space 14, so that the control rod 21, the first storage part volume and the second storage part volume and thus also the limited storage volume composed of the storage volume.
  • a control chamber 23 is provided, which is connected via a throttle 24 to the first storage volume of the first storage space 13.
  • a further control chamber 26 is formed, which is limited by the control rod 21, a control chamber sleeve 27 and the piston portion 20.
  • the control chamber sleeve 27 is arranged within the second storage space 14. Due to the pressure difference between a pressure of the fuel in the further control chamber 26 and a pressure of the fuel in the nozzle chamber 18, a control of the nozzle needle 7 is possible, wherein the pressure in the other control chamber 26 via the pressure in the control chamber 23 is controllable.
  • the control chamber 23 is limited by the control rod 21, a control chamber sleeve 28 and the valve housing 3. Further, valve springs 29, 30 are provided, which act on the control chamber sleeves 27, 28 each with a certain spring force.
  • the control rod 21, the control chamber sleeves 27, 28, the valve springs 29, 30 and the control chambers 23, 26 are part of a hydraulic coupler 31, which may be configured as a force or displacement amplifier.
  • an outlet throttle 32 is provided which defines a certain A / Z ratio with the throttle 24 acting as inlet throttle.
  • the flow through the outlet throttle 32 is controllable via an actuating device 33, wherein the actuating device 33 connects the outlet throttle 32 via a return 34 with a tank 35 or interrupts this connection.
  • valve closing body 6 can be operated by means of the hydraulic coupler 31 to control the opening and closing of the fuel injection valve 1.
  • the control rod 21 floats in the fuel under high pressure, wherein the control rod 21 limits both the first storage part volume of the first storage space 13 and the second storage partial volume of the second storage space 14.
  • the storage volume Due to the storage volume formed by the storage partial volume, vibrations between the high-pressure pump 11 or the common rail and the fuel injection valve 1 can be damped.
  • the storage volume form a substantially tubular storage volume 15, so that there is a risk that hydraulic pressure oscillations occur within the fuel injection valve, which are characterized by a particularly high frequency.
  • pressure oscillations with high frequency and respectable amplitude damage especially in the region of the sealing seat between the valve closing body 6 and the valve seat surface 5 during opening and closing of the fuel injection valve 1 are possible.
  • the storage volume 15 is divided by the storage spaces 13, 14 into two storage sub-volume, which are throttled connected to each other via the throttle 16.
  • the storage volume 15 it is also possible for the storage volume 15 to be subdivided into more than two storage sub-volumes, which are preferably connected to each other in a throttled manner. The advantages of the storage volume 15, in particular with respect to the vibration damping between the high pressure pump 11 and the common rail and the fuel injection valve 1, can be at least substantially obtained.
  • the throttle 16 is taken into account that the fuel channel 17, which connects the second storage space 14 with the nozzle chamber 18, is configured as an unthrottled fuel channel 17.
  • Fig. 2 shows a second embodiment of a fuel injection valve 1.
  • the supply of fuel from the high-pressure pump 11 via the fuel passage 12 takes place directly in the storage volume of the storage volume 15 formed by the second storage space 14.
  • the fuel passage 12 opens into the second storage space 14.
  • This embodiment is suitable, for example, for fuel injection valves 1, in which the fuel inlet nozzle 10 is to be arranged laterally on the valve housing 3. This is usually the case for medium or high load engines.
  • the division of the storage volume 15 into the storage sub-volume is made such that a direct introduction into the second storage space 14, which is arranged closer to the nozzle chamber 18 than the first storage space 13, takes place.
  • This has the further advantage that the throttle effect of the throttle 16 has a smaller influence on the function of the fuel injection valve 1.
  • This may for example relate to the injection pressure or the needle closing speed. This allows an optimization of the throttle 16 with regard to the damping of the pressure oscillations within the valve housing 13, in particular the storage space 15. In addition, there is a great insensitivity with respect to the tolerance of the throttle effect of the throttle 16.
  • the throttle 16 is formed in this embodiment by an annular gap 40 between an annular disc 41 and the control rod 21.
  • the annular disc 41 is in a recess 42 of the valve housing 3 is inserted.
  • the annular disk 41 can also be pressed into the valve housing 3.
  • the embodiment by means of the annular disc 41 allows a cost-effective production of the fuel injection valve 1, which can be easily implemented. Due to the low sensitivity of the equivalent throttle cross-section of the throttle 16 to the damping of the pressure oscillations within the fuel injection valve 1, it is not necessary that special tolerance ranges in the gap dimension of the annular gap 40 are maintained.
  • the size of the storage volume 15 is selected so that a certain amount of fuel can be absorbed, which allows effective damping of the high-frequency vibration components within the valve housing 3 below a certain threshold, so that wear especially in the region of the sealing seat between the valve closing body 6 and the valve seat surface 5 is prevented or at least reduced.
  • the fuel channel 17 is throttled by a throttle 43 in order to allow a faster closing of the nozzle needle 7.

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)
EP20070119028 2006-12-21 2007-10-23 Injecteur de combustible Active EP1936180B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610060657 DE102006060657A1 (de) 2006-12-21 2006-12-21 Brennstoffeinspritzventil

Publications (3)

Publication Number Publication Date
EP1936180A2 true EP1936180A2 (fr) 2008-06-25
EP1936180A3 EP1936180A3 (fr) 2009-09-16
EP1936180B1 EP1936180B1 (fr) 2013-09-11

Family

ID=39166409

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070119028 Active EP1936180B1 (fr) 2006-12-21 2007-10-23 Injecteur de combustible

Country Status (2)

Country Link
EP (1) EP1936180B1 (fr)
DE (1) DE102006060657A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2187034A1 (fr) * 2008-11-14 2010-05-19 Robert Bosch Gmbh Un injecteur de combustible avec élément d'étanchéité axial
WO2011160900A1 (fr) * 2010-06-23 2011-12-29 Robert Bosch Gmbh Dispositif d'injection de carburant à coupleur hydraulique
WO2012085186A1 (fr) * 2010-12-23 2012-06-28 Robert Bosch Gmbh Injecteur de carburant pour moteurs à combustion interne
CN114135430A (zh) * 2021-12-08 2022-03-04 一汽解放汽车有限公司 一种燃料喷射阀

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10155413A1 (de) 2001-11-10 2003-05-22 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10060812A1 (de) * 2000-12-07 2002-06-13 Bosch Gmbh Robert Kraftstoffeinspritzsystem für Brennkraftmaschinen
DE10121892A1 (de) * 2001-05-05 2002-11-07 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10348929A1 (de) * 2003-10-18 2005-05-12 Bosch Gmbh Robert Einspritzventil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10155413A1 (de) 2001-11-10 2003-05-22 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2187034A1 (fr) * 2008-11-14 2010-05-19 Robert Bosch Gmbh Un injecteur de combustible avec élément d'étanchéité axial
WO2011160900A1 (fr) * 2010-06-23 2011-12-29 Robert Bosch Gmbh Dispositif d'injection de carburant à coupleur hydraulique
WO2012085186A1 (fr) * 2010-12-23 2012-06-28 Robert Bosch Gmbh Injecteur de carburant pour moteurs à combustion interne
CN103261660A (zh) * 2010-12-23 2013-08-21 罗伯特·博世有限公司 用于内燃机的燃料喷射阀
CN103261660B (zh) * 2010-12-23 2016-01-13 罗伯特·博世有限公司 用于内燃机的燃料喷射阀
CN114135430A (zh) * 2021-12-08 2022-03-04 一汽解放汽车有限公司 一种燃料喷射阀

Also Published As

Publication number Publication date
EP1936180A3 (fr) 2009-09-16
EP1936180B1 (fr) 2013-09-11
DE102006060657A1 (de) 2008-07-03

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