EP0218061A1 - Einspritzventil - Google Patents

Einspritzventil Download PDF

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Publication number
EP0218061A1
EP0218061A1 EP86111482A EP86111482A EP0218061A1 EP 0218061 A1 EP0218061 A1 EP 0218061A1 EP 86111482 A EP86111482 A EP 86111482A EP 86111482 A EP86111482 A EP 86111482A EP 0218061 A1 EP0218061 A1 EP 0218061A1
Authority
EP
European Patent Office
Prior art keywords
valve
section
fuel
metering
guide
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Withdrawn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
EP86111482A
Other languages
German (de)
English (en)
French (fr)
Inventor
Waldemar Hans
Mathias Linssen
Rudolf Dr.-Ing. Sauer
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 EP0218061A1 publication Critical patent/EP0218061A1/de
Withdrawn legal-status Critical Current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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/042—The valves being provided with fuel passages
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • F02M51/0678—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages all portions having fuel passages, e.g. flats, grooves, diameter reductions
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • 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
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices

Definitions

  • the invention is based on an injection valve according to the preamble of the main claim.
  • An injection valve is already known in which swirl grooves are located above the valve seat in order to improve the sprayed fuel jet and serve to swirl the fuel before the valve seat flows through it.
  • the metering of the amount of fuel sprayed per time cycle is determined by the size of the flow cross section of the spray opening downstream of the valve seat when the valve is open.
  • the deposits which are inevitable in practice, can lead to cross-sectional reductions there and thus to reduced flow rates during prolonged operation.
  • Such a phenomenon is known and feared under the name "emaciation”. It also occurs in other designs of the metering zone, as long as it is located downstream of the valve seat and is therefore exposed to the intake manifold atmosphere.
  • the injection valve according to the invention with the characterizing features of the main claim has the advantage that the formation of deposits in the area of the injection opening has no influence on the fuel metering of the injection valve. Because there is a very high pressure drop at the swirl-generating metering openings, the swirl movement can start up very quickly and produce a fully developed spray pattern after a short time, with the result of very good fuel conditioning.
  • Figure 1 shows a section through a fuel injector
  • Figure 2 shows a section along the line II-II in Figure 1
  • Figure 3 shows a section in the same plane as in Figure 2 in a further embodiment of the magnetic injector.
  • a magnet coil 2 applied to a coil carrier 3.
  • a ferromagnetic core 4 within the magnet coil 2, facing an end face of the core 4, also partly within the coil carrier 3, there is an armature 5, which is connected to a valve needle 6, which in turn is fitted at one end 7 into a recess 8 of the armature 5.
  • the valve needle 6 is slidably mounted in a nozzle body 15 which is connected to the valve housing 1 in a manner not shown.
  • the nozzle body 15 has a coaxial guide bore 16, which merges in the direction facing away from the magnet coil 2 into a tapered valve seat surface 17, which in turn ends in a spray opening 18.
  • the valve needle 6 penetrates the guide bore 16 in the nozzle body 15 with radial play and runs out in the direction facing away from the magnet coil 2 in a conical sealing section 20 which, in cooperation with the conical valve seat surface 17, causes the valve to open or close.
  • the conical sealing section 20 can both run out in the form of a cone described and also have a needle pin which, forming a coaxial extension of the valve needle 6, protrudes from the spray opening 18 of the nozzle body 15.
  • the conical sealing section 20 of the valve needle 6 does not lie directly on the conical valve seat surface 17 of the nozzle body 15, but is located in the area of the conical sealing section 20 as part of the same preferably in the form of a truncated cone slightly raised shaped sealing seat 21.
  • the injection valve is closed, it lies directly on the conical valve seat surface 17 of the nozzle body 15.
  • the valve needle 6 has two guide sections 25 and 26 at an axial distance from one another, which guide the valve needle 6 in the guide bore 16 and which have passages for the fuel.
  • the guide section 25 located upstream of the guide section 26 is designed, for example, as a square.
  • metering openings 27 are incorporated, which are inclined relative to the valve axis in such a way that a swirling movement is forced on the fuel emerging from the metering openings 27 in the direction of the spray opening 18.
  • the shape of the metering openings 27 results from the point of view of flow technology and production technology.
  • the metering openings 27, as shown in FIG. 2 as a section along the line II-II in FIG. 1, have a circular cross section and can be designed as bores.
  • a rectangular flow cross-section has been found to be particularly advantageous, which, as shown in FIG. 3, can be used for metering openings 27 'which are formed as grooves in the outer jacket of the guide section 26 and whose outer boundary is formed by the guide bore 16 of the nozzle body 15 .
  • other than rectangular flow cross sections can also be used for the metering openings 27 'which are designed as grooves.
  • the flow cross-section released through the metering openings 27, 27 ' is significantly smaller than the flow cross-section which becomes free when the valve is open in the region of the conical valve seat surface 17 and the flow cross-section of the spray opening 18.
  • the metered amount of fuel is thus metered almost exclusively through the metering openings 27 and here the majority of the fuel pressure drop.
  • the remaining low pressure drop is then found in the area of the conical valve seat surface and here in particular on the sealing seat 21.
  • the conical gap 30 lies between the second guide section 26 and the sealing seat 21, on the one hand delimited by the conical valve seat surface 17 and on the other hand by the conical sealing section 20. Because from a fluidic point of view, the conical gap 30 represents a dead space; the speed losses occurring there reduce the rapid start of the fuel swirl.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
EP86111482A 1985-09-25 1986-08-19 Einspritzventil Withdrawn EP0218061A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3534125 1985-09-25
DE19853534125 DE3534125A1 (de) 1985-09-25 1985-09-25 Einspritzventil

Publications (1)

Publication Number Publication Date
EP0218061A1 true EP0218061A1 (de) 1987-04-15

Family

ID=6281867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86111482A Withdrawn EP0218061A1 (de) 1985-09-25 1986-08-19 Einspritzventil

Country Status (3)

Country Link
EP (1) EP0218061A1 (ja)
JP (1) JPS6275066A (ja)
DE (1) DE3534125A1 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215398A (en) * 1988-03-09 1989-09-20 Chinese Petroleum Co Low pressure fuel injection into two-stroke engines
CN101560935B (zh) * 2008-04-18 2013-03-20 马涅蒂-马瑞利公司 阀门片直接致动的、用于内燃发动机的燃料喷射器
WO2017200516A1 (en) * 2016-05-16 2017-11-23 Cummins Inc. Swirl injector plunger
EP3550118A1 (en) * 2018-04-04 2019-10-09 Delavan, Inc. Swirling pintle injectors

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161743A (en) * 1986-10-24 1992-11-10 Nippondenso Co., Ltd. Electromagnetic fuel injection valve for internal combustion engine
US5080287A (en) * 1986-10-24 1992-01-14 Nippondenso Co., Ltd. Electromagnetic fuel injection valve for internal combustion engine
JP2508686B2 (ja) * 1987-02-27 1996-06-19 日本電装株式会社 電磁式燃料噴射弁
US5156342A (en) * 1986-10-24 1992-10-20 Nippondenso Co. Ltd. Electromagnetic fuel injection valve for internal combustion engine
DE19813020A1 (de) 1998-03-25 1999-09-30 Bosch Gmbh Robert Brennstoffeinspritzventil

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2407915A (en) * 1942-08-20 1946-09-17 Chrysler Corp Injection nozzle
FR1048735A (fr) * 1950-11-13 1953-12-23 Gicleur à aiguille pour moteurs à combustion interne
US4192466A (en) * 1977-02-21 1980-03-11 Kabushiki Kaisha Toyota Chuo Kenkyusho Swirl injection valve
GB2050504A (en) * 1979-04-24 1981-01-07 Mikuni Kogyo Kk Electromagnetic Fuel Injector for an Internal Combustion Engine Carburation System
GB2123085A (en) * 1982-07-06 1984-01-25 Bosch Gmbh Robert I c engine fuel injection valve
DE3418762A1 (de) * 1984-05-19 1985-11-21 Robert Bosch Gmbh, 7000 Stuttgart Einspritzventil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2407915A (en) * 1942-08-20 1946-09-17 Chrysler Corp Injection nozzle
FR1048735A (fr) * 1950-11-13 1953-12-23 Gicleur à aiguille pour moteurs à combustion interne
US4192466A (en) * 1977-02-21 1980-03-11 Kabushiki Kaisha Toyota Chuo Kenkyusho Swirl injection valve
GB2050504A (en) * 1979-04-24 1981-01-07 Mikuni Kogyo Kk Electromagnetic Fuel Injector for an Internal Combustion Engine Carburation System
GB2123085A (en) * 1982-07-06 1984-01-25 Bosch Gmbh Robert I c engine fuel injection valve
DE3418762A1 (de) * 1984-05-19 1985-11-21 Robert Bosch Gmbh, 7000 Stuttgart Einspritzventil

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215398A (en) * 1988-03-09 1989-09-20 Chinese Petroleum Co Low pressure fuel injection into two-stroke engines
CN101560935B (zh) * 2008-04-18 2013-03-20 马涅蒂-马瑞利公司 阀门片直接致动的、用于内燃发动机的燃料喷射器
WO2017200516A1 (en) * 2016-05-16 2017-11-23 Cummins Inc. Swirl injector plunger
US10920727B2 (en) 2016-05-16 2021-02-16 Cummins Inc. Swirl injector plunger
EP3550118A1 (en) * 2018-04-04 2019-10-09 Delavan, Inc. Swirling pintle injectors

Also Published As

Publication number Publication date
JPS6275066A (ja) 1987-04-06
DE3534125A1 (de) 1987-04-02

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18D Application deemed to be withdrawn

Effective date: 19871016

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SAUER, RUDOLF, DR.-ING.

Inventor name: LINSSEN, MATHIAS

Inventor name: HANS, WALDEMAR