EP1402170A1 - Module de commande destine a un injecteur d'un systeme d'injection a accumulateur - Google Patents

Module de commande destine a un injecteur d'un systeme d'injection a accumulateur

Info

Publication number
EP1402170A1
EP1402170A1 EP02754296A EP02754296A EP1402170A1 EP 1402170 A1 EP1402170 A1 EP 1402170A1 EP 02754296 A EP02754296 A EP 02754296A EP 02754296 A EP02754296 A EP 02754296A EP 1402170 A1 EP1402170 A1 EP 1402170A1
Authority
EP
European Patent Office
Prior art keywords
control module
control
valve body
injector
module according
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
EP02754296A
Other languages
German (de)
English (en)
Other versions
EP1402170B1 (fr
EP1402170B8 (fr
Inventor
Wolfgang Bloching
Willibald SCHÜRZ
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.)
Continental Automotive GmbH
Original Assignee
Siemens AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7690287&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1402170(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1402170A1 publication Critical patent/EP1402170A1/fr
Publication of EP1402170B1 publication Critical patent/EP1402170B1/fr
Application granted granted Critical
Publication of EP1402170B8 publication Critical patent/EP1402170B8/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • 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
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
    • 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
    • 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

Definitions

  • the present invention relates to a control module for an injector of a storage injection system for controlling and guiding an injector valve body.
  • Injectors for storage injection systems are known in various configurations. Such a known injector is shown for example in Figure 4.
  • fuel is fed into the surrounding area of the nozzle needle 36 via a high-pressure feed line 30.
  • the nozzle needle 36 is in contact with a control piston 31, which is arranged at one end in a control chamber 32.
  • the pressure in the control chamber 32 can be controlled in a known manner via a control valve 33, so that the control chamber 32 can be connected to a tank T.
  • the side of the control piston 31 opposite the control chamber 32 is in contact with a low pressure chamber 34 which is connected to the tank T via a low pressure outlet 35.
  • the nozzle needle 36 can lift off its seat in a known manner and an injection can take place.
  • the control module for an injector according to the invention enables a permanent leak-free injector in that all functional elements for controlling and guiding the valve body of the injector are integrated in one component. A minimum number of high-pressure sealing surfaces is thereby achieved.
  • the high-pressure sealing surfaces are only designed as levels, so that there are no cylindrical guide surfaces, which are necessary as high-pressure sealing surfaces in the prior art. As a result, an injector can be provided without the permanent leakage existing in the prior art.
  • a high-pressure inlet, a guide device for guiding the valve body of the injector, a control chamber, an inlet throttle and an outlet throttle are arranged in the control module according to the invention.
  • a control piston is arranged in the control chamber and is connected directly or indirectly to the valve body.
  • the control piston is connected at its end opposite the control chamber to a high-pressure area on the valve body.
  • the control module according to the invention can thus also be constructed in a very compact manner, so that the overall dimensions of the injector can be further reduced in comparison with the prior art. Furthermore, the control module according to the invention also makes it possible, in particular, to dispense with the long high-pressure line present in the prior art, which is usually led through the entire injector body and, in addition to its complex manufacture, can also lead to strength problems.
  • the control module according to the invention preferably further comprises a bypass throttle, which provides a connection between the high-pressure inlet and the control valve of the injector.
  • a bypass throttle which provides a connection between the high-pressure inlet and the control valve of the injector.
  • annular channel which is arranged between the high-pressure inlet and the bypass throttle, is preferably provided.
  • the ring channel can be formed either in the control module or in the nozzle housing of the injector. It is also possible for the ring channel to be formed by recesses both in the control module and in the nozzle housing.
  • the guide device of the control module is designed as a cylindrical ring-shaped extension.
  • the control chamber is particularly preferably provided in the cylindrical extension and the valve body is guided in a central recess formed in the cylindrical extension.
  • connection area is provided either on the outer circumference of the guide device or on the inner circumference of the nozzle housing.
  • the connection area connects the high pressure inlet to the high pressure area on the valve body of the injector.
  • connection area is particularly preferably formed by a channel-like recess or by a plurality of recesses distributed around the circumference of the guide device and / or the nozzle housing.
  • the connection area then arises automatically when the nozzle housing is mounted on the guide device by combining two recesses formed at a corresponding point.
  • the geometric shape of the connection area can be chosen arbitrarily, it is only necessary to ensure that the recesses provide a sufficiently large cross section for a sufficient amount of fuel.
  • a nozzle spring for resetting the valve body is supported on the one hand on the guide device of the control module and on the other hand on a spring plate arranged on the valve body.
  • one or more centering surfaces are provided on the guide device in order to around the
  • the injection accuracy and the structure of the injector can be further improved by preferably designing the control piston and the valve body as a common component.
  • the valve body is particularly preferably designed as a nozzle needle.
  • the control module for an injector according to the invention is preferably used in storage injection systems such as Common rail injectors used for diesel engines. Since the control module according to the invention combines all elements for controlling and guiding the nozzle needle in one component, the injector can be manufactured particularly compactly and inexpensively. Furthermore, the functional test of this component is significantly simplified and the control module has only a minimal number of high-pressure sealing surfaces. The required high pressure resistance of the injector can be provided in a particularly cost-effective manner.
  • control module according to the invention, which results in significant advantages with regard to the switching dynamics of the injector and thereby also to the achievable small amounts of injected fuel.
  • the invention is described below on the basis of a preferred exemplary embodiment in conjunction with the drawing. In the drawing is:
  • Figure 1 is a schematic sectional view of an injector with a control module according to an embodiment of the present invention
  • FIG 2 is an enlarged schematic sectional view of the control module shown in Figure 1;
  • Figure 3 is a sectional view taken along line A-A of Figure 2.
  • Figure 4 shows an injector for a memory injection system according to the prior art.
  • FIGS. 1 to 3 An exemplary embodiment according to the present invention is described below with reference to FIGS. 1 to 3.
  • control module 1 for an injector of a storage injection system is very compact.
  • the control module 1 comprises a high-pressure inlet 2 in order to supply fuel from a high-pressure pump to the injector.
  • the control module 1 further comprises a guide device 3 for guiding a valve body 8 of the injector, a control chamber 4, an inlet throttle 5 and an outlet throttle 6.
  • the inlet throttle 5 provides a connection between the high-pressure inlet 2 and the control chamber 4.
  • the flow restrictor 6 connects the control chamber 4 to a control valve 15.
  • the control valve 15 comprises a valve seat 16 and a valve ball 17 and is lifted and set by means of an actuator (not shown), such as a piezo, a magnetostrictive actuator or a solenoid, from the valve seat 16 in a known manner a connection of the control room 4 with a low pressure area ready.
  • an actuator not shown
  • WEI Furthermore, a bypass throttle 14 is provided in the control module 1, which connects the control valve 15 to the high-pressure inlet 2 via an annular channel 13 (cf. FIG. 1).
  • the guide device 3 is designed as a cylindrical ring-shaped attachment.
  • the needle guide 18 is formed in the inner, central recess of the guide device 3 and the control chamber 4 is arranged at the end of the recess (cf. FIG. 2).
  • connection areas 19 provide a connection between the high-pressure inlet 2, more precisely the ring channel 13, and a high-pressure area 9, which is located on the nozzle needle 8.
  • the connection areas 19 can be produced, for example, simply by grinding the cylindrical extension 3.
  • a nozzle spring 11 for resetting the nozzle needle 8 is supported on the one hand on the guide device 3 and on the other hand on a spring plate 12 which is provided on the nozzle needle 8 in a known manner (cf. FIG. 1).
  • FIG. 1 shows the open position of the injector, in which fuel is injected.
  • the fuel is thus supplied via the high-pressure inlet 2 and the ring channel 13 through the connection area 19 of the guide device 3 to the high-pressure area 9 at the nozzle needle 8.
  • the control valve 15 is closed again by means of the actuator, so that fuel is supplied to the control chamber 4 on the one hand via the inlet throttle 5 and on the other hand via the bypass throttle 14 and the outlet throttle 6. Thereby, the pressure in the control chamber 4 rises again, so that the control piston 7 is moved downward, so that the 'nozzle needle 8 closes the injection hole again and the injection is completed.
  • the flow direction in the outlet throttle 6 is reversed.
  • the nozzle spring 11 provides the closing force for the injector, since the pressure difference between the control chamber 4 and the high-pressure region 9 at the nozzle needle 8 is only relatively small.
  • the inventive design of the control module 1 can thus provide a permanent leak-free injector, since the high-pressure sealing surfaces 21 and 22 present on the control module 1 (see FIG. 2) are only designed as levels which are relatively easy to seal. Thus, according to the invention, a seal in the area of the control piston or the needle guide is no longer necessary, so that there is no leakage when the injector is not actuated. Since, according to the invention, all elements for controlling and guiding the nozzle needle are arranged in one component, a compact injector which can be produced particularly cost-effectively can also be used. be provided. In addition, the inventive design of the injector enables a minimum volume to be achieved in the control room 4, which leads to improved switching dynamics. Furthermore, even very small amounts of fuel can be injected very precisely. Thus, with the present invention, a permanent leak-free injector can be provided for the first time, which significantly improves the efficiency of the injector compared to the prior art.
  • the present invention thus relates to a control module 1 for an injector of a storage injection system for controlling and guiding a valve body 8.
  • the control module comprises a high-pressure inlet 2 for supplying fuel and a guide device 3 for guiding the valve body 8. Furthermore, there is a control chamber 4, an inlet throttle 5 and an outlet throttle 6 is provided.
  • the inlet throttle 5 connects the high pressure inlet 2 to the control chamber 4 and the outlet throttle 6 connects the control chamber 4 to a control valve 15.
  • a control piston 7 is arranged in the control chamber 4, which at its end opposite the control chamber 4 connects to a high pressure region 9 on the valve body 8 stands.

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)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un module de commande (1) destiné à un injecteur d'un système d'injection à accumulateur et servant à commander et à guider un corps de soupape (8). Le module de commande selon l'invention comprend une conduite d'amenée haute pression (2) servant à amener du carburant, ainsi qu'un dispositif de guidage (3) servant à guider le corps de soupape (8). Il comprend également une chambre de commande (4), un étranglement d'arrivée (5) et un étranglement de sortie (6). L'étranglement d'arrivée (5) relie la conduite d'amenée haute pression (2) à la chambre de commande (4) et l'étranglement de sortie (6) relie la chambre de commande (4) à une soupape de commande (15). Dans la chambre de commande (4) se trouve un piston de commande (7) qui est raccordé, au niveau de son extrémité opposée à la chambre de commande (4), à une zone haute pression (9) sur le corps de soupape (8).
EP02754296A 2001-07-02 2002-07-01 Module de commande destine a un injecteur d'un systeme d'injection a accumulateur Revoked EP1402170B8 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10131953 2001-07-02
DE10131953A DE10131953A1 (de) 2001-07-02 2001-07-02 Steuermodul für einen Injektor eines Speichereinspritzsystems
PCT/DE2002/002383 WO2003004862A1 (fr) 2001-07-02 2002-07-01 Module de commande destine a un injecteur d'un systeme d'injection a accumulateur

Publications (3)

Publication Number Publication Date
EP1402170A1 true EP1402170A1 (fr) 2004-03-31
EP1402170B1 EP1402170B1 (fr) 2008-01-16
EP1402170B8 EP1402170B8 (fr) 2008-03-19

Family

ID=7690287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02754296A Revoked EP1402170B8 (fr) 2001-07-02 2002-07-01 Module de commande destine a un injecteur d'un systeme d'injection a accumulateur

Country Status (5)

Country Link
US (1) US6986474B2 (fr)
EP (1) EP1402170B8 (fr)
JP (1) JP4200096B2 (fr)
DE (2) DE10131953A1 (fr)
WO (1) WO2003004862A1 (fr)

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DE10330257A1 (de) * 2003-07-04 2005-01-20 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102004024926A1 (de) * 2004-05-19 2005-12-15 Volkswagen Mechatronic Gmbh & Co. Kg Pumpe-Düse-Einheit
DE102004042558B4 (de) * 2004-09-02 2007-12-13 Siemens Ag Kraftstoffinjektor mit einer von einer Servoventileinheit gesteuerten Registerdüse
DE102005059172A1 (de) * 2005-12-12 2007-06-14 Robert Bosch Gmbh Kraftstoffinjektor
CN101542103B (zh) * 2006-10-16 2011-12-14 甘瑟-许德罗玛格股份公司 内燃机的燃油喷射阀
DE102007029793A1 (de) * 2007-06-27 2008-07-17 L'orange Gmbh Kraftstoffinjektor
US8505514B2 (en) * 2010-03-09 2013-08-13 Caterpillar Inc. Fluid injector with auxiliary filling orifice
CH702496B1 (de) * 2010-05-07 2011-07-15 Liebherr Machines Bulle Sa Hochdruckinjektor.
US8448878B2 (en) * 2010-11-08 2013-05-28 Caterpillar Inc. Fuel injector with needle control system that includes F, A, Z and E orifices
US8844842B2 (en) * 2011-08-12 2014-09-30 Caterpillar Inc. Three-way needle control valve and dual fuel injection system using same
US8690075B2 (en) * 2011-11-07 2014-04-08 Caterpillar Inc. Fuel injector with needle control system that includes F, A, Z and E orifices
DE102012220025A1 (de) * 2012-06-29 2014-01-02 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
US20150008271A1 (en) 2013-07-02 2015-01-08 Caterpillar Inc. Injector Orifice Plate Filter

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Also Published As

Publication number Publication date
EP1402170B1 (fr) 2008-01-16
JP2004532956A (ja) 2004-10-28
EP1402170B8 (fr) 2008-03-19
DE50211560D1 (de) 2008-03-06
US20040169094A1 (en) 2004-09-02
WO2003004862A1 (fr) 2003-01-16
JP4200096B2 (ja) 2008-12-24
US6986474B2 (en) 2006-01-17
DE10131953A1 (de) 2003-01-23

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