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GB2150978A - Electromagnetic fuel injection valve - Google Patents

Electromagnetic fuel injection valve Download PDF

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Publication number
GB2150978A
GB2150978A GB08430593A GB8430593A GB2150978A GB 2150978 A GB2150978 A GB 2150978A GB 08430593 A GB08430593 A GB 08430593A GB 8430593 A GB8430593 A GB 8430593A GB 2150978 A GB2150978 A GB 2150978A
Authority
GB
United Kingdom
Prior art keywords
fuel
valve
closure member
magnet
fuel injection
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
GB08430593A
Other versions
GB2150978B (en
GB8430593D0 (en
Inventor
Heinrich Hutten
Gerhard Wissler
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.)
Pierburg GmbH
Original Assignee
Pierburg 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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of GB8430593D0 publication Critical patent/GB8430593D0/en
Publication of GB2150978A publication Critical patent/GB2150978A/en
Application granted granted Critical
Publication of GB2150978B publication Critical patent/GB2150978B/en
Expired 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
    • 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
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • 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
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • F02M51/0617—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature having two or more electromagnets
    • 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

A fuel injection valve has two fuel-flow apertures 10,5 controlled by respective valve members 9,4 actuated by respective electomagnet coils 8,6. One or the other or both coils may be energised by electrical pulses of variable length. <IMAGE>

Description

SPECIFICATION Electromagnetic fuel injection valve The invention relates to an electromagnetic fuel injection valve with a magnet-coil system for controlling the opening and closing of a fuel-flow aperture by a valve closure member.
A valve of this general kind is known from the German Offenlegungsschrift 22 37 746.
The known valve has two electromagnetic coils for producing a greater actuating force on the valve, A fuel-injection system, for an interval combustion engine, which has only one valve closure member controlling a single fuel-flow aperture through which fuel is injected into the induction manifold of the engine, must nevertheless be capable of metering injection correctly over the whole range of operating conditions. What this means is that the valve must meter the injection of fuel with sufficient accuracy not only during idling at low engine speeds, but also when the engine is delivering full torque at high engine speeds.
In the known fuel-injection valves difficulties are encountered in finding a satisfactory constructional solution which allows for the very wide range of injection quantities required, the constructional variables available being the cross section of the fuel-flow aperture and the pulse-length of the electromagnet system, which is limited by the highest engine speed. The dynamic behaviour of the moving armature of the magnet-coil also influences the behaviour of the valve.
From the German Offeniegungsschrift 26 11 311 a carburettor system is known which has several fuel-flow apertures of different cross-sectional areas, to allow for different operating conditions. The different fuel-flow apertures are selectively engaged by selective actuation of several electromagnetic valves.
The intention in the present invention is to provide a fuel injection valve which is compact in construction and yet capable of accurately metering the quantities of fuel injected during each suction stroke of the engine under all operating conditions.
The problem is solved by the invention defined in claim 1. Broadly, separate from the first magnet-coil system there is a second magnet-coil system which actuates a second valve situated internally coaxial with the first valve, the second valve controlling a second fuel-flow aperture situated internally coaxial with the first fuel-flow aperture.
One embodiment of the invention will be described by way of example with reference to the accompanying drawing, referring to which, the second, inner valve closure member 1 comprises a moving armature 2 of a magnet-coil 6, a needle valve-stem 3 and a valve-head in the form of a ball 4 which obturates an inner fuel-flow aperture 5 for metering small flows of fuel to the engine.
The moving armature 2 is thrust downwards, towards the closed position, by an inner spring 7.
When the required injection of fuel exceeds what can be delivered during the greatest permissible injection period, which is determined by the highest engine speed, a first, outer valve closure member 9 is opened by an outer magnet-coil 8. The outer valve closure member 9 comprises a hollow-cylindrical valve stem which acts as the moving armature for the outer magnet-coil 8. The outer valve closure member 9 has an annular valve head 1 2 which obturates an outer, annular fuel4low aperture 1 0. The hollow-cylindrical valve stem of the outer valve closure member 9 is thrust downwards, towards the closed position, by an outer spring 11. When the first, outer valve closure member 9 opens, the second, inner valve closure member 1 at first closes.
Under these circumstances the valve closure member 9 is held open against the combined thrust of the two springs 11 and 8. During its shortest open period the outer valve closure member 9 delivers the same quantity of fuel as is delivered by the inner valve closure member 1 during its longest open period.
If the quantity of fuel delivered by the outer valve closure member 9 during its longest open period is insufficient, the quantity can be increased by additionally opening the inner valve closure member 1, both the magnetcoils 8 and 6 being energised together for this purpose, fuel now flowing in parallel through both the fuel4low apertures 10 and 5. By this method one can easily vary the quantity of fuel delivered to the engine during each injection period by a factor of say twelve, between the minimal and maximal quantities, this factor depending on the dimensions of the two fuel-flow aperatures.
The fuel-flow aperture 10 of the outer valve closure member 9 is closed, under the influence of spring 11, by contact between the annular valve head 1 2 and the floor of the valve housing 1 3. The inner fuel-flow aperture 5 is centric to the outer fuel-flow aperture 1 0.
The stroke of the outer valve closure member 9 is limited by contact between a bush 14, which is fixed to the hollow-cylindrical outer valve closure member 9, and a sleeve 1 5 inserted into the outer magnet-coil 8.
Fuel is supplied under pressure to the two injection valves through an inlet 1 6 situated upstream of both the fuel-flow apertures 10 and 15.
During operation of the engine the two concentric fuel-flow apertures 10 and 5 are opened and closed independently, the one or the other or both, by periodic pulses of the two magnet coils 8 and 6, which can, for example, be nested together the one within the other, the pulses being synchronised with the intake strokes of the engine.

Claims (2)

1. An electromagnetic fuel injection valve, with a magnet-coil system for controlling a first fuel-flow aperture (10), and wherein separate from the first magnet-coil system (8), there is a second magnet-coil system (6) which actuates a second valve (1), situated internally coaxial with the first valve (9), the second valve (1) controlling a second fuel-flow aperture (5) situated internally coaxial with the first fuel-flow aperture (10).
2. A valve as claimed in Claim 1, and wherein fuel is supplied under pressure through an inlet (16) situated upstream of the two fuel-flow apertures (10) and (5), the same supply-pressure being common to both the fuel-flow apertures.
GB08430593A 1983-12-07 1984-12-04 Electromagnetic fuel injection valve Expired GB2150978B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833344229 DE3344229A1 (en) 1983-12-07 1983-12-07 ELECTROMAGNETIC FUEL INJECTION VALVE

Publications (3)

Publication Number Publication Date
GB8430593D0 GB8430593D0 (en) 1985-01-09
GB2150978A true GB2150978A (en) 1985-07-10
GB2150978B GB2150978B (en) 1987-09-03

Family

ID=6216262

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08430593A Expired GB2150978B (en) 1983-12-07 1984-12-04 Electromagnetic fuel injection valve

Country Status (3)

Country Link
DE (1) DE3344229A1 (en)
FR (1) FR2556440B1 (en)
GB (1) GB2150978B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227281A (en) * 1989-01-19 1990-07-25 Ilmor Engineering Limited I.c. engine fuel injection solenoid valve assembly
EP0404330A1 (en) * 1989-06-21 1990-12-27 General Motors Corporation Solenoid-actuated valve assembly
US5141164A (en) * 1989-12-08 1992-08-25 Nippondenso Co., Ltd. Fuel injector
US5199641A (en) * 1988-09-29 1993-04-06 Siemens Aktiengesellschaft Fuel injection nozzle with controllable fuel jet characteristic
US5383607A (en) * 1991-12-19 1995-01-24 Robert Bosch Gmbh Electromagnetically actuated injection valve
EP0692624A1 (en) * 1994-07-12 1996-01-17 Magneti Marelli France Dual jet fuel injection nozzle with parallel cores and air gaps for internal combustion injection engines
US5988532A (en) * 1995-03-23 1999-11-23 Fev Motorentechnik Gmbh & Co. Valve nozzle
WO2002006663A1 (en) * 2000-07-15 2002-01-24 Robert Bosch Gmbh Fuel injection valve
EP2103802A1 (en) * 2008-03-17 2009-09-23 Robert Bosch GmbH Injector

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4925112A (en) * 1989-06-21 1990-05-15 General Motors Corporation Fuel injection
US4972996A (en) * 1989-10-30 1990-11-27 Siemens-Bendix Automotive Electronics L.P. Dual lift electromagnetic fuel injector
DE4403148C2 (en) * 1994-02-03 1999-01-28 Iav Motor Gmbh Electromagnetically controlled multi-jet injection valve, especially for internal combustion engines with two intake channels per cylinder
US5872312A (en) * 1995-07-21 1999-02-16 Mercedes-Benz Ag Method for recognizing defective ignition or injection system in internal combustion engines
DE19526644C1 (en) * 1995-07-21 1996-07-04 Daimler Benz Ag Defective ignition or fuel injection device detection system for i.c. engine
DE19709795A1 (en) * 1997-03-10 1998-09-17 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
FR2921109B1 (en) * 2007-09-17 2009-11-20 Peugeot Citroen Automobiles Sa METHOD AND DEVICE FOR SUPPLYING THE AIR / FUEL MIXTURE OF A CYLINDER OF AN INTERNAL COMBUSTION ENGINE

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE415417C (en) * 1924-04-05 1925-06-29 Acro A G Fluid-controlled injection valve for internal combustion engines
US1882392A (en) * 1930-03-07 1932-10-11 Musgrave Joseph Leslie Electromagnetic double control valve
DE2237746A1 (en) * 1972-08-01 1974-02-07 Bosch Gmbh Robert INJECTION VALVE FOR DIESEL COMBUSTION ENGINES
DE2261278C2 (en) * 1972-12-14 1983-12-15 Karl Dungs Gmbh & Co, 7067 Urbach Double valve
JPS51106829A (en) * 1975-03-18 1976-09-22 Nissan Motor KUNENPISEIGYOSOCHI
US4020803A (en) * 1975-10-30 1977-05-03 The Bendix Corporation Combined fuel injection and intake valve for electronic fuel injection engine systems
US4342443A (en) * 1979-10-26 1982-08-03 Colt Industries Operating Corp Multi-stage fuel metering valve assembly
DE3113475A1 (en) * 1981-04-03 1982-10-21 Robert Bosch Gmbh, 7000 Stuttgart Fuel injection nozzle

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5199641A (en) * 1988-09-29 1993-04-06 Siemens Aktiengesellschaft Fuel injection nozzle with controllable fuel jet characteristic
GB2227281A (en) * 1989-01-19 1990-07-25 Ilmor Engineering Limited I.c. engine fuel injection solenoid valve assembly
GB2227281B (en) * 1989-01-19 1993-03-10 Ilmor Engineering Limited Fuel injection assembly for internal combustion engine
EP0404330A1 (en) * 1989-06-21 1990-12-27 General Motors Corporation Solenoid-actuated valve assembly
US5141164A (en) * 1989-12-08 1992-08-25 Nippondenso Co., Ltd. Fuel injector
US5383607A (en) * 1991-12-19 1995-01-24 Robert Bosch Gmbh Electromagnetically actuated injection valve
EP0692624A1 (en) * 1994-07-12 1996-01-17 Magneti Marelli France Dual jet fuel injection nozzle with parallel cores and air gaps for internal combustion injection engines
FR2722538A1 (en) * 1994-07-12 1996-01-19 Magneti Marelli France "BI-JET" FUEL INJECTOR WITH PARALLEL GAPS FOR INTERNAL COMBUSTION ENGINE SUPPLIED BY INJECTION
US5988532A (en) * 1995-03-23 1999-11-23 Fev Motorentechnik Gmbh & Co. Valve nozzle
WO2002006663A1 (en) * 2000-07-15 2002-01-24 Robert Bosch Gmbh Fuel injection valve
US6698674B2 (en) 2000-07-15 2004-03-02 Robert Bosch Gmbh Fuel injector valve
EP2103802A1 (en) * 2008-03-17 2009-09-23 Robert Bosch GmbH Injector

Also Published As

Publication number Publication date
GB2150978B (en) 1987-09-03
FR2556440B1 (en) 1988-03-04
FR2556440A1 (en) 1985-06-14
GB8430593D0 (en) 1985-01-09
DE3344229A1 (en) 1985-06-20

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee