WO2007098985A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
WO2007098985A1
WO2007098985A1 PCT/EP2007/050451 EP2007050451W WO2007098985A1 WO 2007098985 A1 WO2007098985 A1 WO 2007098985A1 EP 2007050451 W EP2007050451 W EP 2007050451W WO 2007098985 A1 WO2007098985 A1 WO 2007098985A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
fuel injection
chamber
ball element
pin
Prior art date
Application number
PCT/EP2007/050451
Other languages
German (de)
English (en)
Inventor
Uwe Bruetsch
Dietmar Uhlmann
Christoph Radsak
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 WO2007098985A1 publication Critical patent/WO2007098985A1/fr

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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way valves
    • 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 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.
  • a fuel injection valve in which an actuator by means of a valve controls the pressure in a control chamber, wherein in response to the pressure in the control chamber actuation of a valve needle for spraying of fuel.
  • the control chamber is connected via an inlet throttle with a high-pressure region and an outlet throttle with a valve chamber of the valve.
  • the valve chamber is connected via a bypass directly to the high pressure area.
  • a valve pin serves to control the passage via the bypass and at the same time controls a passage to a low pressure area. To control the passage from the valve space to the low pressure area, the valve pin cooperates with a seat.
  • the fuel injection valve known from DE 101 45 862 A1 has the disadvantage that, in the unpressurized state, the seat may not be completely closed to the low-pressure region by means of the valve pin. As a result, the pressure build-up in the valve chamber during commissioning of the fuel injection valve can be delayed because part of the fuel to Low pressure area drains off. It is conceivable that a valve spring is used, which adjusts the valve pin in a desired starting position. However, such a valve spring has the disadvantage that lateral forces occur that cause undesirable wear on the seat. In a partial open position of the valve may also damage the seat, in particular by cavitation caused.
  • the fuel injection valve according to the invention with the features of claim 1 has the advantage that the valve pin is at least substantially applied without transverse forces or with vanishing transverse forces in the direction of the starting position, so that wear of a sealing edge or the like is reduced to the low pressure region. Damage to the seat, for example due to cavitation, can also be prevented or reduced.
  • the valve which may be configured in particular as a switching valve, having a valve pin which cooperates to close the connection between the valve chamber and the low-pressure region via the drain opening with the ball element of the valve pin to a sealing seat.
  • the sealing seat between the ball element and the valve seat body is preferably formed on a sealing edge of the control valve seat body, wherein the spring element uniformly urges the ball element by means of the bolt part of the valve pin against the sealing edge. Due to the uniform loading of the sealing edge in particular punctual loads of the sealing edge, as they can occur at shear forces prevented, so that wear of the valve seat body is prevented, especially in the region of the sealing edge.
  • the sealing edge can be designed simply by the configuration of the ball element as at least partially spherical ball element, since in particular a precise compliance with a specific seat geometry due to the ball seat is not required. Furthermore, the diameter of the sealing edge can be easily adapted to the existing requirements.
  • the ball element of the valve pin is pressed into the recess of the bolt part of the valve pin facing the outlet opening. Characterized a phase shift in the movement of the ball member and the bolt member is prevented during the actuation of the valve pin, so that a reliable operation of the control valve is ensured. This is particularly advantageous in combination with a spring element which is also firmly connected to the bolt part.
  • the actuator acts in an advantageous manner via an actuating element on the ball element of the valve pin, wherein a contact surface of the actuating element bears against the ball element.
  • the contact surface of the actuating element and the surface of the ball element facing the contact surface are adapted to each other.
  • a planar configuration of the contact surface and a planar configuration of the ball element adapted thereto on the side of the contact surface of the actuating element by a flat flattening are advantageous.
  • This configuration allows within certain limits a radial degree of freedom between the actuating element and the ball element, wherein a cost-effective design with certain tolerances is possible.
  • the contact surface of the actuating element as a matched to the geometry of the ball element, concave contact surface. It is possible that the ball element is designed as a solid ball, which allows a cost-effective design of the control valve.
  • the spring element has a sleeve-shaped end portion which encloses a peripheral step of the bolt part of the valve pin circumferentially.
  • a fixed connection may be formed by pressing the sleeve-shaped end portion of the spring element on the peripheral step of the bolt part. Due to the peripheral step, a centering of the spring element is ensured with respect to the bolt part, so that the occurrence of transverse forces is prevented.
  • the fixed connection prevents phase shifts in the oscillatory movement of the bolt part and spring element, so that the function of the valve is improved.
  • Fig. 1 shows a first embodiment of an inventive
  • Fuel injection valve in a partial schematic sectional view.
  • Fig. 1 shows an embodiment of a fuel injection valve 1 of the invention in a partial, schematic sectional view.
  • the fuel injection valve 1 can serve, in particular, as an injector for fuel injection systems of mixture-compression, 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.
  • the fuel injection valve 1 according to the invention is also suitable for other applications.
  • the fuel injection valve 1 has a multi-part valve housing 2, which is connected to a nozzle body 3.
  • a nozzle retaining nut 5 is screwed to a holding body 26 of the housing 2 in order to connect the nozzle body 3 to the housing 2.
  • a needle seat 4 formed on the nozzle body 3 interacts with a nozzle needle 6 to form a sealing seat.
  • the nozzle needle 6 closes at a distal end of the sealing seat with a sleeve 7 and a throttle plate 8 a control chamber 9 a.
  • In the operation of the fuel injection valve 1 is located in the control chamber 9 under a certain pressure standing fuel.
  • the fuel injection valve 1 also has a fuel inlet nozzle 12 shown in simplified form, which can be connected to a common rail or the like by means of a suitable fuel line.
  • the fuel passes into a fuel channel 13 provided in the interior of the housing 2 via the fuel inlet connection 12 and into the fuel chamber 10.
  • the fuel channel 13 and the fuel chamber 10 form a high-pressure region 14 in which high-pressure fuel is provided during operation of the fuel injection valve 1 is.
  • the control chamber 9 is connected on the one hand via an inlet throttle 15 to the fuel passage 13 of the high-pressure region 14. On the other hand, the control chamber 9 via an outlet throttle 16 with a valve chamber 17 of a valve
  • the valve 18 is preferably designed as a switching valve 18. Via a bypass channel 19, a connection of the fuel chamber 10 of the high-pressure region 14 with the control valve chamber 17, bypassing the inlet throttle 15, the control chamber 9 and the outlet throttle 16 is possible.
  • the bypass channel 19 is designed as a bypass 19 and in particular as a bypass bore 19. The inlet throttle 15, the outlet throttle 16 and the bypass channel
  • the valve 18 is disposed within a valve plate 20 of the fuel injection valve 1.
  • the valve 18 has a valve pin 21 and a spring element 22.
  • the valve pin 21 comprises a ball element 23 and a pin part 24, wherein the ball element 23 is pressed into the pin part 24.
  • the ball element 23 of the valve pin 21 cooperates with a valve seat body 25, which is formed on the valve plate 20, to form a sealing seat.
  • the fuel injection valve 1 also has a piezoelectric actuator 30 which is arranged in the interior of the housing 2 and which is connected via a hydraulic coupler 31, which in particular acts as a stroke transmission device 31 can be configured, with the valve pin 21 via an actuating element 32 of the hydraulic coupler 31 is in operative connection.
  • the valve pin 21 is adjusted against the force of the spring element 22 by means of the actuating element 32 so that the seal formed between the ball member 23 and the valve seat body 25 is opened, whereby a pressure of the fuel in the valve chamber 17 drops and fuel from the Control chamber 9 flows via the outlet throttle 16 in the valve chamber 17. In this case, the pressure in the control chamber 9 is reduced, whereby it comes to injecting fuel from the fuel chamber 10 via the nozzle opening 11.
  • Fig. 2 shows the designated in Fig. 1 with Il section of the fuel injection valve 1 in more detail.
  • a connection between the valve chamber 17 and a low-pressure region 40 via a drain opening 41 can be opened and closed by means of the valve pin 21, wherein the ball element 23 rests in the closed state against a sealing edge 42 which is provided on the valve seat body 25.
  • a bolt part 24 of the valve pin 21 is arranged within the valve chamber 17 and has a drain opening 41 facing recess 43 into which the ball element 23 is inserted. In this case, the ball element 23 is pressed into the recess 43 of the bolt part 24 in order to achieve a firm connection between the ball element 23 and the bolt part 24.
  • the bolt part 24 also has a peripheral step 44, on the spring element 22 is pressed with a sleeve-shaped end portion 45.
  • a centering of the spring element 22 with respect to an axis 46 of the bolt part 24 of the valve pin 21 is achieved, whereby the uniform application of the sealing edge 42 is improved due to the force of the spring element 22.
  • a phase shift in the oscillatory movement of the bolt part 24 and the spring element 22 is excluded by the connection between the sleeve-shaped end portion 45 of the spring element 22 and the peripheral step 44 of the bolt part 24. As a result, the operation of the valve 18 is further improved.
  • the position of the sealing edge 42 with respect to a predetermined ideal position with respect to a predetermined axis 46 of the valve pin 41 may be both slightly offset radially and slightly inclined. Due to the planar configuration of both the contact surface 51 of the actuating element 32 and the flat flattening 52 of the ball member 23, a certain displacement of the axis 46 of the valve pin 21 in a radial direction is possible.
  • the hydraulic coupler 31 is preferably designed so that when actuated actuator 30 at least largely unpressurized concerns the actuator 32 to the ball member 23, so that due to the flexible design of the spring member 22 has a certain inclination of the pin member 24 with respect to the axis 46 is allowed to close the ball seat formed between the ball member 23 and the sealing edge 42.
  • the described embodiment allows tolerance compensation at least within certain limits. In this case, certain wear and tear, which occur during the life of the fuel injection valve 1, can be compensated.
  • FIG. 3 shows the valve pin 21 of the valve 18 shown in FIG. 2 and the actuating element 32 in an excerpted, partially sectioned illustration according to a second exemplary embodiment of the invention.
  • the contact surface 51 on the fully spherical geometry of the ball member 23 adapted concave contact surface 51.
  • the contact surface 51 bears against the surface 53 of the ball element 23 when the valve pin 21 is actuated.
  • the ball element 23 can thereby be configured as a solid ball and is therefore inexpensive to produce.
  • the Vorstehin 61 and / or the total height 60 can be determined to adjust a valve lift of the valve 18 individually.
  • An initial length HO of the spring element 22 pressed onto the circumferential step 44 is selected to be somewhat greater than an installation length H 1 (FIG. 2) in order to ensure a certain prestressing of the spring element 22.
  • the pin member 24 may also be configured so that it is guided with a side surface 63 on an inner wall 64 of the valve chamber 17, wherein suitable longitudinal grooves are provided in the region of the side surface 63 on the pin member 24 to a flow of fuel in the direction of the discharge opening 41 to allow.
  • the ball element 23 may be cylindrically shaped, in particular in the region of the recess 43, in order to allow a rotation-proof press-fitting of the ball element 23 into the recess 43 of the bolt part 24.

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

L'invention concerne une soupape d'injection de carburant (1) servant en particulier d'injecteur dans des systèmes d'injection de carburant de moteurs à combustion interne à autoallumage par compression, lequel injecteur comprend un actionneur (30) qui régule la pression régnant dans une chambre de commande (9) par l'intermédiaire d'un dispositif de multiplication de course (31) et d'une soupape (18). Cette soupape (18) présente une goupille (21) et un élément élastique (22), la goupille (21) de la soupape présentant une partie goupille (24) et un élément sphérique (23) enfoncé dans un évidement (43) de la partie goupille (24). L'élément sphérique (23) est pressé contre une arête d'étanchéité (42) de la soupape (18) par l'élément élastique (22) au moyen de la partie goupille (24). Cet élément sphérique (23) permet ainsi un fonctionnement fiable de la soupape (18).
PCT/EP2007/050451 2006-02-28 2007-01-17 Soupape d'injection de carburant WO2007098985A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610009069 DE102006009069A1 (de) 2006-02-28 2006-02-28 Brennstoffeinspritzventil
DE102006009069.1 2006-02-28

Publications (1)

Publication Number Publication Date
WO2007098985A1 true WO2007098985A1 (fr) 2007-09-07

Family

ID=37776580

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/050451 WO2007098985A1 (fr) 2006-02-28 2007-01-17 Soupape d'injection de carburant

Country Status (2)

Country Link
DE (1) DE102006009069A1 (fr)
WO (1) WO2007098985A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1892407A1 (fr) * 2006-08-09 2008-02-27 Robert Bosch Gmbh Injecteur de carburant doté d'un mouvement de levé conduit amélioré de l'organe de fermeture
CN111577498A (zh) * 2020-05-18 2020-08-25 上海工程技术大学 一种两位三通原理的共轨喷油器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112943499B (zh) * 2021-02-25 2022-05-03 山东菏泽华星油泵油嘴有限公司 一种喷油嘴的新型喷孔机构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999061779A1 (fr) * 1998-05-28 1999-12-02 Siemens Aktiengesellschaft Soupape d'injection de carburant pour moteurs a combustion interne
EP1186773A2 (fr) * 2000-09-06 2002-03-13 Toyota Jidosha Kabushiki Kaisha Injecteur de combustible
WO2003027491A1 (fr) * 2001-09-18 2003-04-03 Robert Bosch Gmbh Procede pour l'injection de carburant ainsi que soupape pour la commande de liquides
WO2003069151A1 (fr) * 2002-02-14 2003-08-21 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs a combustion interne
DE10326260A1 (de) * 2003-06-11 2005-01-05 Robert Bosch Gmbh Kraftstoffeinspritzventil und Verfahren zu dessen Steuerung
DE10335211A1 (de) * 2003-08-01 2005-02-17 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung für eine Brennkraftmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999061779A1 (fr) * 1998-05-28 1999-12-02 Siemens Aktiengesellschaft Soupape d'injection de carburant pour moteurs a combustion interne
EP1186773A2 (fr) * 2000-09-06 2002-03-13 Toyota Jidosha Kabushiki Kaisha Injecteur de combustible
WO2003027491A1 (fr) * 2001-09-18 2003-04-03 Robert Bosch Gmbh Procede pour l'injection de carburant ainsi que soupape pour la commande de liquides
WO2003069151A1 (fr) * 2002-02-14 2003-08-21 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs a combustion interne
DE10326260A1 (de) * 2003-06-11 2005-01-05 Robert Bosch Gmbh Kraftstoffeinspritzventil und Verfahren zu dessen Steuerung
DE10335211A1 (de) * 2003-08-01 2005-02-17 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung für eine Brennkraftmaschine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1892407A1 (fr) * 2006-08-09 2008-02-27 Robert Bosch Gmbh Injecteur de carburant doté d'un mouvement de levé conduit amélioré de l'organe de fermeture
CN111577498A (zh) * 2020-05-18 2020-08-25 上海工程技术大学 一种两位三通原理的共轨喷油器
CN111577498B (zh) * 2020-05-18 2021-12-14 上海工程技术大学 一种两位三通原理的共轨喷油器

Also Published As

Publication number Publication date
DE102006009069A1 (de) 2007-08-30

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