EP1602825A1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
EP1602825A1
EP1602825A1 EP04256547A EP04256547A EP1602825A1 EP 1602825 A1 EP1602825 A1 EP 1602825A1 EP 04256547 A EP04256547 A EP 04256547A EP 04256547 A EP04256547 A EP 04256547A EP 1602825 A1 EP1602825 A1 EP 1602825A1
Authority
EP
European Patent Office
Prior art keywords
fuel
valve member
seal
fuel injector
spring
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Withdrawn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
EP04256547A
Other languages
German (de)
English (en)
Inventor
Franciscus Clerx
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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
Priority claimed from EP04253311A external-priority patent/EP1602824A1/fr
Application filed by Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP04256547A priority Critical patent/EP1602825A1/fr
Publication of EP1602825A1 publication Critical patent/EP1602825A1/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Withdrawn legal-status Critical Current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
    • F02M61/04—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
    • F02M61/08—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 the valves opening in direction of fuel flow
    • 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
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
    • F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • 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
    • F02M63/0057—Means for avoiding fuel contact with valve actuator, e.g. isolating actuators by using bellows or diaphragms
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for

Definitions

  • This invention relates to fuel injectors for internal combustion engines.
  • Figure 1 is a schematic depiction of a pintle-type, solenoid actuated fuel injector.
  • a body 10 is formed with a fuel inlet 12 at one end and a seat 14 at the other.
  • a pintle 16 cooperates with the seat 14 to form an outlet valve and nozzle.
  • the pintle 16 is normally biased closed in the direction Y by a spring 18, and is opened for fuel injection by a solenoid actuator 20 acting on an armature 22 to move the pintle in the -Y direction.
  • Hydraulic forces produced by the fuel pressure within the body 10 produce a net force on the pintle in the -Y direction on a surface enclosed by diameter D.
  • the hydraulic forces assist in opening of the pintle but resist closing. Therefore for opening the actuator must overcome the spring force plus some friction force minus the net hydraulic force. This means that, for the same spring force, as fuel pressure is reduced the actuator has to overcome more force and opening becomes more difficult or even impossible. Also, reducing the fuel pressure reduces the speed of opening and increases the speed of closing.
  • the present invention seeks to meet this problem by the fuel injector structure defined in claim 1.
  • an O-ring forms a seal between the body 10 and an enlarged area 16a of the pintle 16, this seal being on the diameter D.
  • the body 10 is formed with a bypass passage 26 which conducts fuel from the fuel inlet 12 to the area beneath the O-ring 24.
  • the actuator 20 is opposed by the spring force alone (plus any frictional forces) under all circumstances.
  • the actuator 20 and armature 22 are now dry which increases freedom of material choice.
  • Figure 3 is similar, but a metal bellow seal 28 is used instead of the O-ring 24.
  • a bypass passage is not used.
  • An auxiliary spring/seal 30 bears on the top of the pintle 16.
  • the spring/seal 30 is forms a closed partition with respect to the interior of the injector body 10 while being open to ambient pressure via an aperture 32, and may for example by pressed from spring steel.
  • the function of the spring/seal 30 is to apply a load to the pintle on the -Y direction, which load varies with hydraulic pressure within the injector body 10.
  • the spring/seal 31 applies a -Y force governed by its shape and material. As hydraulic pressure rises, this tends to displace the spring/seal 30 in the +Y direction, lessening its force on the pintle 16.
  • the invention may be applied to a fuel injector with an inwardly-opening valve member rather than an outwardly-opening pintle, and to a fuel injector actuated hydraulically or mechanically rather than by a solenoid.
  • the actuator can be dry, allowing a wider choice of materials; this could improve performance and reduce cost.
  • the invention allows the actuator to be optimised only for speed, which permits the package size to be reduced.
EP04256547A 2004-06-03 2004-10-22 Injecteur de carburant Withdrawn EP1602825A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04256547A EP1602825A1 (fr) 2004-06-03 2004-10-22 Injecteur de carburant

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04253311 2004-06-03
EP04253311A EP1602824A1 (fr) 2004-06-03 2004-06-03 Injecteur de carburant
EP04256547A EP1602825A1 (fr) 2004-06-03 2004-10-22 Injecteur de carburant

Publications (1)

Publication Number Publication Date
EP1602825A1 true EP1602825A1 (fr) 2005-12-07

Family

ID=35456038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04256547A Withdrawn EP1602825A1 (fr) 2004-06-03 2004-10-22 Injecteur de carburant

Country Status (1)

Country Link
EP (1) EP1602825A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1783358A1 (fr) * 2005-11-02 2007-05-09 Delphi Technologies, Inc. Soupape d'injection de carburant

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404345A1 (fr) * 1989-06-21 1990-12-27 General Motors Corporation Dispositif d'injection de combustible
US5203538A (en) * 1990-10-31 1993-04-20 Yamaha Hatsudoki Kabushiki Kaisha Solenoid valve device
US6311950B1 (en) * 1999-04-20 2001-11-06 Siemens Aktiengesellschaft Fluid metering device
WO2002038948A1 (fr) * 2000-11-13 2002-05-16 Siemens Vdo Automotive Corporation Compensateur magnetique-hydraulique pour injecteur de carburant
US6431472B1 (en) * 2000-12-21 2002-08-13 Caterpillar Inc. Fuel injector nozzle with outwardly opening check valve
US20040004139A1 (en) * 2000-11-02 2004-01-08 Bernhard Fischer Fluid dosing device with a throttle point

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404345A1 (fr) * 1989-06-21 1990-12-27 General Motors Corporation Dispositif d'injection de combustible
US5203538A (en) * 1990-10-31 1993-04-20 Yamaha Hatsudoki Kabushiki Kaisha Solenoid valve device
US6311950B1 (en) * 1999-04-20 2001-11-06 Siemens Aktiengesellschaft Fluid metering device
US20040004139A1 (en) * 2000-11-02 2004-01-08 Bernhard Fischer Fluid dosing device with a throttle point
WO2002038948A1 (fr) * 2000-11-13 2002-05-16 Siemens Vdo Automotive Corporation Compensateur magnetique-hydraulique pour injecteur de carburant
US6431472B1 (en) * 2000-12-21 2002-08-13 Caterpillar Inc. Fuel injector nozzle with outwardly opening check valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1783358A1 (fr) * 2005-11-02 2007-05-09 Delphi Technologies, Inc. Soupape d'injection de carburant

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