EP2711536A1 - Module de buse et soupape d'injection - Google Patents

Module de buse et soupape d'injection Download PDF

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Publication number
EP2711536A1
EP2711536A1 EP12185581.1A EP12185581A EP2711536A1 EP 2711536 A1 EP2711536 A1 EP 2711536A1 EP 12185581 A EP12185581 A EP 12185581A EP 2711536 A1 EP2711536 A1 EP 2711536A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
injection
module
injection nozzle
cross
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Withdrawn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
EP12185581.1A
Other languages
German (de)
English (en)
Inventor
Marco Maragliulo
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
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Priority to EP12185581.1A priority Critical patent/EP2711536A1/fr
Publication of EP2711536A1 publication Critical patent/EP2711536A1/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Withdrawn legal-status Critical Current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
    • 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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1826—Discharge orifices having different sizes
    • 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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/184—Discharge orifices having non circular sections

Definitions

  • the invention relates to a nozzle module for an injection valve and the injection valve.
  • Fuel injectors are well-known devices for injecting fuel into engines, either into an intake manifold upstream of a combustion chamber, or directly into the combustion chamber. A correspondingly improved mixture preparation can be achieved if the fuel is metered at a very high pressure. A fuel spray of the fuel injector influences not only the combustion and power generation but also the generation of undesirable byproducts of combustion.
  • the object of the invention is to create a nozzle module of an injection valve and an injection valve which facilitate an effective and precise injection of the injection valve and/or a cost-effective manufacturing of the nozzle module respectively of the injection valve.
  • the invention is distinguished by a nozzle module for an injection valve.
  • the nozzle module comprises a nozzle body, which has a seal seat, a nozzle body recess and at least one first injection nozzle and at least one second injection nozzle which are hydraulically coupled with the nozzle body recess.
  • the nozzle body recess can be hydraulically coupled to a high pressure circuit of a fluid.
  • the first injection nozzle is embodied as a through-hole with a circular cross-sectional shape and the at least second injection nozzle is embodied as a through-hole with a cross-sectional shape differing from the cross-sectional shape of the at least one first injection nozzle.
  • the nozzle module comprises at least one nozzle needle arranged in an axially moveable fashion in the nozzle body recess with a central axis, wherein the nozzle needle comprises a seat area with a sealing surface and the sealing surface interacts with the seal seat such that in a closed position the nozzle needle prevents fluid from flowing through the at least one first and second injection nozzle and in an open position releases a fluid flow through the at least one first and second injection nozzle.
  • the drilling of the at least first and second injection nozzles may be done in one production step, respectively.
  • EDM electrical discharge machining
  • the nozzle module with at least more than one injection nozzle may ensure firstly as widespread as possible a distribution of the fuel in the combustion chamber, with which wide regions of the combustion chamber are covered by the injection jets, which is advantageous in particular with regard to the homogenization of the air/fuel mixture.
  • the at least one first injection nozzle may comprise a through-hole with an outlet and inlet opening having different diameters.
  • the first and/or second injection nozzle may taper down from the inlet opening to the outlet opening.
  • the first and/or second injection nozzles may comprise different lengths, respectively.
  • the at least one second injection nozzle is embodied as a through-hole with a cross-sectional shape suitable to generate a flat injection jet. This may allow generating a thin, film-shaped, jet with low penetration and good atomization close to the spark plug for stratified operations.
  • the at least second injection nozzle is embodied as a through-hole with a mainly elliptical and/or mainly rectangular and/or mainly groove-shaped and/or sickle-shaped cross-section. This may allow generating a thin, film-shaped, jet with low penetration and good atomization close to a spark plug for stratified operations.
  • the nozzle module comprises at least two first injection nozzles comprising different hole cross-sections.
  • the variation of the diameter and/or size of the first or second injector nozzles can be coordinated with the angle of inclination of the injection valve mounted on a cylinder.
  • the invention is distinguished by an injection valve comprising a nozzle module according to the first aspect and an injector module, with the injector module being operable to act on the nozzle module.
  • FIG. 1 shows an injection valve 1 with a nozzle module 10 and an injector module 11.
  • the injector module 11 functionally interacts with the nozzle module 10.
  • the nozzle module 10 has a nozzle body 12 and the injector module 11 has an injector body 13.
  • the nozzle body 12 and the injector body 13 are formed integrally and are embodied as a fuel tube.
  • the nozzle body 12 and injector body 13 may be firmly bonded, e. g. by welding.
  • the nozzle body 12 may be permanently fastened to the injector body 13 by means of an acorn nut.
  • the nozzle body 12 and the injector body 13 thus form a common housing of the injection valve 1.
  • a nozzle needle 18 with a central axis Z is arranged in a nozzle body recess 14, the latter forming the nozzle module 10 together with the nozzle body 12.
  • the injection valve 1 comprises an actuator.
  • the actuator is an electro-magnetic actuator in the present embodiment.
  • the electro-magnetic actuator comprises an armature 16 and a solenoid 17.
  • the solenoid 17 is arranged radially around the injector body 1313.
  • the actuator is designed to actuate the nozzle needle 18.
  • the actuator unit is activated according to a predetermined activation signal within a given activation period for effecting a fluid flow out of at least one first and at least one second injection nozzle 24, 25.
  • the actuator can, however, also be embodied as another actuator which is known to the person skilled in the art for this purpose and is known to be suitable.
  • the actuator may also be a piezoelectric actuator.
  • the armature 16 is axially movable in the nozzle body recess 14.
  • the armature 16 is coupled to the nozzle needle 18 to enable an axial movement of the nozzle needle 18.
  • a nozzle spring 22 is arranged in a recess 26 provided in the injector body. Furthermore a filter element is arranged in the recess 26 of the injector body 13 and forms a further seat for the nozzle spring 22.
  • the nozzle needle 18 is guided in an area of the nozzle body recess 14. It is also pre-stressed by means of the nozzle spring 22, such that it prevents fluid from flowing through the at least one first injection nozzle 24 and the at least one second injection nozzle 25 arranged in a nozzle cone 23 of the nozzle body 12, if no additional forces act on the nozzle needle 18.
  • the nozzle needle 18 When actuating the actuator the nozzle needle 18 is firstly moved from its closed position into its open position, in which the nozzle needle 18 releases the fluid flow through the at least one first and the at least one second injection nozzle 24, 25.
  • Figure 2 exemplarily illustrates a schematic three-dimensional view of a fluid outlet part of the nozzle module 10, in particular the nozzle cone 23.
  • Figure 2 shows an exemplary arrangement of at least one first injection nozzle 24 and at least one second injection nozzle 25 in the nozzle body 12.
  • the nozzle body 12 comprises six first injection nozzles 24, which are arranged in the nozzle cone 23 and embodied as through-holes with a circular cross-sectional shape. These first injection nozzles 24 may comprise different cross-section diameters.
  • the nozzle cone 23 of the nozzle body 12 shown in Figure 2 comprises one second injection nozzle 25, which is embodied as a through-hole with a cross-sectional shape differing from the cross-sectional shape of the at least one first injection nozzle.
  • This second injection nozzle 25 may be embodied as a through-hole with a cross-sectional shape suitable to generate a flat injection jet.
  • Such second injection nozzles 25 may be respectively embodied as a through-hole with a mainly elliptical and/or mainly rectangular and/or mainly groove-shaped and/or sickle-shaped cross-section.
  • the nozzle body 12 may comprise more than the one second injection nozzle 25.
  • the nozzle body 12 may comprise more than the one second injection nozzles 25, which have different cross-sectional shapes.
  • the different cross-sectional shapes may differ in size and/or type.
  • the at least one first injection nozzle 24 may comprise a through-hole with an inlet opening 56 and outlet opening 57 having different diameters.
  • the first and/or second injection nozzle 24, 25 may taper down from the inlet opening 56 to the outlet opening 57.
  • Figure 3 shows a first exemplary fuel spray pattern 60 of the nozzle module 10 of the injection valve 1.
  • the nozzle body 12 comprises six of the first injection nozzles 24 and one of the second injection nozzles 25.
  • Each of the first injection nozzles 24 generates the first injection jet 61 with a mainly conical shape.
  • the second injection nozzle 25 generates the second injection jet 62 with a mainly sickle-shaped cross-section.
  • a combustion chamber 75 of a combustion engine for example of a spark ignition engine with direct fuel injection (SIDI engine), is partially illustrated in a longitudinal-section view.
  • a piston 71 is moveable in a closed end cylinder 73 and defines with the cylinder 73 a variable volume combustion chamber 75.
  • the cylinder 73 comprises a longitudinal axis L.
  • the combustion chamber 75 is configured with a spark plug 77 and an injection valve 1 cooperatively arranged such that the fuel spray pattern 60 from the injection vale will go very close to the spark plug gap.
  • the exemplary combustion engine comprises at least one gas inlet valve 79 and at least one gas outlet valve (not shown).
  • the spark plug 77 and the injection valve 1 are located offset in the cylinder head with respect to the longitudinal axis L of the cylinder 73.
  • the nozzle module 10 of the injection valve 1 may comprise at least three, preferably at least four injection nozzles 24, 25, in particular seven or eight injection nozzles 24, 25.
  • a typical total number of injection nozzles 24, 25 is four to eight.
  • a certain number of injection nozzles 24, 25 ensures firstly as widespread as possible a distribution of the fuel in the combustion chamber 75, with which wide regions of the combustion chamber 75 are covered by the injection jets 61, 62, which is advantageous in particular with regard to the homogenization of the air/fuel mixture.
  • the variation of the diameter and/or size and/or length of the injector nozzles may preferably be coordinated with the angle of inclination of the injection valve 1, that is to say the greater the degree to which the installation position of the injection valve 1 is inclined, the more pronounced the variation of the diameters and/or sizes and/or lengths may be. This corresponds to the fact that the impetuses of the injection jets 61, 62 differ to a greater extent with increasing angle of inclination.
  • two of the at least one first injection nozzles 24 may be designed to generate long and thin jets to fill the combustion chamber 75 along the bigger dimension.
  • one of the at least one first injection nozzles 24 may be designed and arranged to generate a short and thick jet to fill the combustion chamber 75 and/or to avoid impingement.
  • One of the second injection nozzles 25 may be designed and arranged to generate a thin, film-shaped, jet with low penetration and good atomization close to the spark plug 75 for stratified operations.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP12185581.1A 2012-09-24 2012-09-24 Module de buse et soupape d'injection Withdrawn EP2711536A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12185581.1A EP2711536A1 (fr) 2012-09-24 2012-09-24 Module de buse et soupape d'injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12185581.1A EP2711536A1 (fr) 2012-09-24 2012-09-24 Module de buse et soupape d'injection

Publications (1)

Publication Number Publication Date
EP2711536A1 true EP2711536A1 (fr) 2014-03-26

Family

ID=46970064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12185581.1A Withdrawn EP2711536A1 (fr) 2012-09-24 2012-09-24 Module de buse et soupape d'injection

Country Status (1)

Country Link
EP (1) EP2711536A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2829720A1 (fr) * 2013-07-22 2015-01-28 Delphi Technologies, Inc. Injecteur de carburant
US9551311B2 (en) 2014-07-17 2017-01-24 Continental Automotive Gmbh Nozzle body, the valve assembly and fluid injection valve

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2229868A1 (en) * 1973-05-15 1974-12-13 Cav Ltd Plunger type fuel injector nozzle - has length of hole through nozzle end adjustable to vary spray angle
US4857696A (en) * 1987-06-12 1989-08-15 Raycon Textron Inc. Laser/EDM drilling manufacturing cell
WO2001090571A2 (fr) * 2000-05-26 2001-11-29 Robert Bosch Gmbh Systeme d'injection de carburant
FR2860558A1 (fr) * 2003-10-06 2005-04-08 Renault Sas Injecteur de moteur a combustion interne pour vehicule comprenant une buse munie d'un orifice externe
FR2860557A1 (fr) * 2003-10-06 2005-04-08 Renault Sa Injecteur de carburant de moteur a combustion interne pour vehicule comprenant une buse presentant au moins un orifice
DE102009047704A1 (de) * 2009-12-09 2011-06-16 Robert Bosch Gmbh Kraftstoffeinspritzventil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2229868A1 (en) * 1973-05-15 1974-12-13 Cav Ltd Plunger type fuel injector nozzle - has length of hole through nozzle end adjustable to vary spray angle
US4857696A (en) * 1987-06-12 1989-08-15 Raycon Textron Inc. Laser/EDM drilling manufacturing cell
WO2001090571A2 (fr) * 2000-05-26 2001-11-29 Robert Bosch Gmbh Systeme d'injection de carburant
FR2860558A1 (fr) * 2003-10-06 2005-04-08 Renault Sas Injecteur de moteur a combustion interne pour vehicule comprenant une buse munie d'un orifice externe
FR2860557A1 (fr) * 2003-10-06 2005-04-08 Renault Sa Injecteur de carburant de moteur a combustion interne pour vehicule comprenant une buse presentant au moins un orifice
DE102009047704A1 (de) * 2009-12-09 2011-06-16 Robert Bosch Gmbh Kraftstoffeinspritzventil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2829720A1 (fr) * 2013-07-22 2015-01-28 Delphi Technologies, Inc. Injecteur de carburant
US9850869B2 (en) 2013-07-22 2017-12-26 Delphi Technologies, Inc. Fuel injector
US9551311B2 (en) 2014-07-17 2017-01-24 Continental Automotive Gmbh Nozzle body, the valve assembly and fluid injection valve

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