WO2008058799A1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

Info

Publication number
WO2008058799A1
WO2008058799A1 PCT/EP2007/060107 EP2007060107W WO2008058799A1 WO 2008058799 A1 WO2008058799 A1 WO 2008058799A1 EP 2007060107 W EP2007060107 W EP 2007060107W WO 2008058799 A1 WO2008058799 A1 WO 2008058799A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
fuel injector
nozzle body
extension
combustion chamber
Prior art date
Application number
PCT/EP2007/060107
Other languages
German (de)
English (en)
Inventor
Friedrich Boecking
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 WO2008058799A1 publication Critical patent/WO2008058799A1/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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/001—Control chambers formed by movable sleeves
    • 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
    • F02M63/0028—Valves characterised by the valve actuating means hydraulic
    • F02M63/0029—Valves characterised by the valve actuating means hydraulic using a pilot valve controlling a hydraulic chamber
    • 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

Definitions

  • the invention relates to a fuel injector with a holding body to which a nozzle body is fastened by means of a nozzle retaining nut, in which a nozzle needle is guided from a closed position to an open position to and fro, in which high-pressure fuel is injected into a combustion chamber of an internal combustion engine ,
  • Conventional fuel injectors have an outer diameter of 19 millimeters.
  • the object of the invention is to provide a fuel injector according to the preamble of claim 1, which is versatile and inexpensive to produce.
  • the object is in a fuel injector with a holding body to which a nozzle body is fixed by means of a nozzle retaining nut, in which a nozzle needle is guided from a closed position to an open position movable back and forth, injected in the high-pressure fuel into a combustion chamber of an internal combustion engine is achieved by the fact that the nozzle body at its end remote from the combustion chamber a Has nozzle body extension.
  • the artificial nozzle body extension makes it possible to narrow the fuel injector at its end close to the combustion chamber, in particular to an outside diameter of 17 millimeters. This provides the advantage that the fuel injector according to the invention can also be used in smaller engines.
  • the hydraulic volume in the nozzle body is increased by the artificial nozzle body extension. As a result, occurring during operation of the fuel injector hydraulic vibrations can be reduced.
  • a preferred embodiment of the fuel injector is characterized in that the nozzle body extension is integrally connected to the nozzle body.
  • the nozzle body with the nozzle body extension is longer than conventional nozzle body.
  • a further preferred embodiment of the fuel injector is characterized in that the nozzle body extension comprises an extension sleeve which has a combustion chamber near end face, which bears against a combustion chamber remote end face of the nozzle body.
  • the extension sleeve is an additional component.
  • a further preferred embodiment of the fuel injector is characterized in that the extension sleeve has the shape of a straight circular cylinder jacket.
  • the shape of the extension sleeve is adapted to the shape of the combustion chamber distal end of the nozzle body.
  • a further preferred embodiment of the fuel injector is characterized in that the extension sleeve has the same inner diameter and / or the same outer diameter as the nozzle body.
  • the thickness of the extension sleeve is adapted to the thickness of the combustion chamber distal end of the nozzle body.
  • a further preferred embodiment of the fuel injector is characterized in that in the extension sleeve a control raumbegrenzungshülse is arranged, in which the combustion chamber remote end of the nozzle needle defines a control room.
  • the control chamber limiting sleeve preferably has a biting edge at its end remote from the combustion chamber.
  • a further preferred embodiment of the fuel injector is characterized in that between the extension of the nozzle body and the holding body, a throttle plate and / or a valve plate are arranged / is.
  • the valve plate and / or the throttle plate are / is part of a control valve device which is integrated in the fuel injector.
  • the nozzle needle has a nozzle needle extension.
  • the nozzle needle extension is the same size as the nozzle body extension.
  • a further preferred exemplary embodiment of the fuel injector is characterized in that the nozzle retaining nut, at least at its end remote from the combustion chamber, has an outer diameter of 17 millimeters.
  • the fuel injector according to the invention in particular at its end remote from the combustion chamber, has an outer diameter that is two millimeters smaller than conventional fuel injectors.
  • the invention further relates to a construction kit for a previously described fuel injector, with nozzle needles, nozzle bodies and nozzle clamping nuts, which are of different lengths and / or of different sizes
  • the nozzle body can be made in one or more parts, that is with at least one extension sleeve.
  • the modular system according to the invention allows with only three new components an embodiment of the fuel injector with an outer diameter of 17 millimeters in the lower region of the fuel injector.
  • the accompanying figure shows a partial view of a fuel injector according to the invention in longitudinal section.
  • the accompanying figure shows a fuel injector, which is also referred to as a fuel injection valve, and is intended for installation in an internal combustion engine, not shown, of a motor vehicle.
  • the fuel injector is designed as a common rail injector for injecting preferably diesel fuel.
  • the fuel injector comprises an injector housing 1 with a nozzle module 2 and a valve control module 3.
  • the nozzle module 2 comprises a nozzle needle 8 arranged and guided in a nozzle body 5.
  • the nozzle needle 8 has at one end a nozzle needle tip 9 which is located in the free end of the nozzle needle Nozzle body 5 provided injection holes 11, 12 closes.
  • the nozzle needle tip 9 is also referred to as the combustion chamber near the end of the nozzle needle 8.
  • the end of the nozzle body 5 with the spray holes 11, 12 referred to as the combustion chamber near the end of the nozzle body 5.
  • the valve control module 3 comprises a throttle plate 15 and a valve plate 16.
  • the throttle plate 15 and the valve plate 16 are clamped with the interposition of an extension sleeve 20 by means of a nozzle lock nut 22 against a holding body 18.
  • the extension sleeve 20 is in Extension of the nozzle body in the axial direction between the nozzle body 5 and the throttle plate 15 is arranged.
  • the valve plate 16 is arranged in the axial direction between the throttle plate 15 and the holding body 18.
  • the holding body 18 is provided with an external thread 23, in particular a metric external thread M15, onto which a complementarily formed internal thread of the nozzle clamping nut 22 is screwed.
  • the nozzle body 5 has at its combustion chamber remote end the shape of a straight circular cylinder jacket.
  • the extension sleeve 20 also has the
  • Shape of a straight circular cylinder jacket whose shape is adapted to the shape of the combustion chamber remote end of the nozzle body 5.
  • the combustion chamber remote end of the nozzle body 5 and the extension sleeve 20 define radially inwardly a substantially circular cylindrical hydraulic volume 24, which is filled via a fuel inlet 26 with highly pressurized fuel.
  • the hydraulic volume 24 communicates with a pressure chamber 32 via a connecting channel, which is recessed between a flat 31 and the nozzle body 5.
  • the high-pressure passage 30 includes a first high-pressure passage portion 27 passing through the throttle plate 15, a second high-pressure passage portion 28 passing through the valve plate 16, and a third high-pressure passage portion 29 passing through the holding body 18.
  • the nozzle needle tip 9 opposite end of the nozzle needle 8 is also referred to as the combustion chamber distal end of the nozzle needle 8 and limited in the axial direction of a control chamber 34 which is bounded in the radial direction by a control chamber limiting sleeve 36.
  • the control chamber limiting sleeve 36 At its end remote from the combustion chamber, the control chamber limiting sleeve 36 has a biting edge which digs into the throttle plate 15.
  • a nozzle spring 38 is clamped between the combustion chamber near the end of the control chamber limiting sleeve 36 and a spring plate 39.
  • the fe- derteller 39 is supported on a shoulder 40 which is provided on the nozzle needle 8.
  • the control chamber limiting sleeve 36 is held with its biting edge in abutment against the throttle plate 15.
  • the nozzle needle tip 9 of the nozzle needle 8 is held by the biasing force of the nozzle spring 38 in abutment with its associated sealing seat.
  • the control chamber 34 is filled with high-pressure fuel via a feed channel 42 equipped with an inlet throttle 41 from the fuel inlet 26.
  • the control chamber 34 communicates with a valve chamber 48 via a drain channel 45 equipped with an outlet throttle 44.
  • a control valve body 50 is arranged in the valve chamber 48.
  • the control valve body 50 can be actuated with the interposition of a booster piston 52 by an actuator (not shown), in particular a piezoactuator.
  • control valve body 50 When the control valve body 50 is actuated via the actuator, it releases a pressure relief connection between the valve chamber 48 and a pressure relief space. Then, the pressure in the control chamber 34 is reduced via the drainage channel 45, so that the nozzle needle 8 lifts with its tip 9 from the associated sealing seat.
  • the valve chamber 48 communicates via a connecting channel 54 with the hydraulic volume 24 in connection.
  • the connecting passage 54 is closable by the control valve body 50 when it is actuated.
  • the nozzle body 5 is extended by the extension sleeve 20.
  • the outer diameter of the extension sleeve 20 is exactly as large as the outer diameter of the combustion chamber distal end of the nozzle body 5.
  • the nozzle needle 8 is extended by the same length by which the nozzle body 5 is extended by the extension sleeve 20.
  • the nozzle retaining nut 22 is extended by the length of the extension sleeve 20.
  • a kit is provided in a simple manner, with three new components, namely with the extension sleeve 20, the elongated nozzle needle 8 and the extended nozzle lock nut 22, the creation of a fuel injector with an outer diameter 60 of 17 millimeters in the lower part of the injector, that is, at the combustion chamber end of the nozzle retaining nut 22.

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 un injecteur de carburant comprenant un corps de support (18), auquel est fixé un corps de buse (5) au moyen d'un écrou tendeur de buse (22), corps dans lequel une aiguille d'injecteur (8) est guidée de manière mobile, selon un mouvement alternatif, d'une position de fermeture à une position d'ouverture, dans laquelle du carburant à haute pression est injecté dans une chambre de combustion d'un moteur à combustion interne. L'invention vise à créer un injecteur de carburant qui puisse être utilisé de manière polyvalente et fabriqué de manière économique. À cet effet, le corps de buse (5) présente une extension du corps de buse sur son extrémité opposée à la chambre de combustion.
PCT/EP2007/060107 2006-11-16 2007-09-24 Injecteur de carburant WO2008058799A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610054064 DE102006054064A1 (de) 2006-11-16 2006-11-16 Kraftstoffinjektor
DE102006054064.6 2006-11-16

Publications (1)

Publication Number Publication Date
WO2008058799A1 true WO2008058799A1 (fr) 2008-05-22

Family

ID=38858958

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/060107 WO2008058799A1 (fr) 2006-11-16 2007-09-24 Injecteur de carburant

Country Status (2)

Country Link
DE (1) DE102006054064A1 (fr)
WO (1) WO2008058799A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2134956A1 (fr) * 2007-03-09 2009-12-23 Robert Bosch GmbH Injecteur de carburant à soupape de commande améliorée
CN116181537A (zh) * 2023-02-08 2023-05-30 钧风电控科技(泰州)有限责任公司 一种电磁阀下沉偏置双进油道喷油器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013012525A1 (de) 2013-07-27 2015-01-29 Westfalia-Automotive Gmbh Anhängekupplungssystem für Kraftfahrzeuge

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10000027A1 (de) * 1999-02-10 2000-08-17 Caterpillar Inc Brennstoffeinspritzvorrichtung mit gesteuertem Überlauf, zur Erzeugung einer geteilten Einspritzung
US20010035465A1 (en) * 1998-10-13 2001-11-01 Ronald D. Shinogle Fuel injector with rate shaping control through piezoelectric nozzle lift
EP1164283A2 (fr) * 2000-06-15 2001-12-19 Toyota Jidosha Kabushiki Kaisha Soupape d'injection de combustible
WO2004070192A1 (fr) * 2003-02-05 2004-08-19 Robert Bosch Gmbh Soupape d'injection de carburant pourvue de deux pointeaux coaxiaux

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010035465A1 (en) * 1998-10-13 2001-11-01 Ronald D. Shinogle Fuel injector with rate shaping control through piezoelectric nozzle lift
DE10000027A1 (de) * 1999-02-10 2000-08-17 Caterpillar Inc Brennstoffeinspritzvorrichtung mit gesteuertem Überlauf, zur Erzeugung einer geteilten Einspritzung
EP1164283A2 (fr) * 2000-06-15 2001-12-19 Toyota Jidosha Kabushiki Kaisha Soupape d'injection de combustible
WO2004070192A1 (fr) * 2003-02-05 2004-08-19 Robert Bosch Gmbh Soupape d'injection de carburant pourvue de deux pointeaux coaxiaux

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2134956A1 (fr) * 2007-03-09 2009-12-23 Robert Bosch GmbH Injecteur de carburant à soupape de commande améliorée
CN116181537A (zh) * 2023-02-08 2023-05-30 钧风电控科技(泰州)有限责任公司 一种电磁阀下沉偏置双进油道喷油器
CN116181537B (zh) * 2023-02-08 2024-01-23 钧风电控科技(泰州)有限责任公司 一种电磁阀下沉偏置双进油道喷油器

Also Published As

Publication number Publication date
DE102006054064A1 (de) 2008-05-21

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