EP0347914A1 - Elektromagnetisches Kraftstoffdosier- und Kraftstoffzerstäubungsventil - Google Patents

Elektromagnetisches Kraftstoffdosier- und Kraftstoffzerstäubungsventil Download PDF

Info

Publication number
EP0347914A1
EP0347914A1 EP89111393A EP89111393A EP0347914A1 EP 0347914 A1 EP0347914 A1 EP 0347914A1 EP 89111393 A EP89111393 A EP 89111393A EP 89111393 A EP89111393 A EP 89111393A EP 0347914 A1 EP0347914 A1 EP 0347914A1
Authority
EP
European Patent Office
Prior art keywords
valve
nozzle
supporting body
fuel
axial
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
EP89111393A
Other languages
English (en)
French (fr)
Other versions
EP0347914B1 (de
Inventor
Francesco Morini
Massimo Lolli
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.)
Weber SRL
Original Assignee
Weber SRL
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 Weber SRL filed Critical Weber SRL
Publication of EP0347914A1 publication Critical patent/EP0347914A1/de
Application granted granted Critical
Publication of EP0347914B1 publication Critical patent/EP0347914B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • 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

Definitions

  • the present invention relates to an electromagnetic fuel metering and atomizing valve for an internal com­bustion engine fuel supply device.
  • valves of the aforementioned type substantially comprise a cylindrical supporting body having a first axial cavity housing an electromagnet, and an axial hole communicating with said cavity and housing an axially-sliding anchor integral with a mobile plugging member.
  • Said valves also comprise a nozzle secured to and projecting axially from the supporting body, and in which is formed a fuel outlet hole communicating with said axial cavity and controlled by said plugging member. This is designed to move, by virtue of said electromagnet, between a first closed position wherein it is pushed by a spring against a seat on the nozzle, thus closing the fuel outlet hole, and an open position wherein the fuel outlet hole is opened.
  • Said valves present a duct for feeding the fuel (piped to the valve) into a chamber communicating with said fuel outlet hole.
  • Said fuel duct usually comprises an axial hole through the core and anchor on the valve, and further passages formed between further members and said supporting body and nozzle. On said valves, therefore, fuel is fed into said chamber along a duct orignating at the top end and extending along the entire axial length of the valve.
  • a major drawback of known valves of the aforementioned type is the formation of fuel vapours inside the fuel duct, which results in impaired operation of the valve in terms of metering and atomizing performance. This is particularly noticeable when operating with high-­temperature fuel, as when the vehicle is left in the sun for prolonged periods of time.
  • the pressure at which the fuel is fed into the chamber communicating with the fuel supply hole is not strictly constant, and rarely corresponds to the set pressure.
  • the fuel supply circuit to the valve presents a pressure regulator for maintaining substantially constant fuel supply pressure.
  • the pressure inside the chamber differs from that of said upstream portion due to the resistance encountered by the fuel in the duct portion formed inside the valve.
  • valves failure of such valves to provide for strictly constant fuel pressure, corresponding to the set pressure, immediately upstream from the fuel outlet hole, invariably results, as already state, in impaired metering and atomizing performance.
  • the chamber formed inside the valve, immediately upstream from the fuel outlet hole is supplied with fuel through holes formed inside a portion of the nozzle close to the chamber itself.
  • valves of the aforementioned type fail to provide a solution to the drawbacks caused by the formation of fuel vapours.
  • valves of this sort featuring fuel outlet holes on the nozzle involve fairly complex machining operations, thus resulting in high manufacturing cost of the valve as a whole.
  • the aim of the present invention is to provide an electro­magnetic fuel metering and atomizing valve designed to overcome the drawbacks typically associated with known valves of the aforementioned type, i.e. a valve providing for efficient metering and atomizing perform­ance under all operating conditions; which is of straight-­forward design, and may be produced cheaply by virtue of involving no complex mechanical machining.
  • an electromagnetic fuel metering and atomizing valve for an internal combustion engine fuel supply device substantially comprising: . a substantially cylindrical supporting body having a first axial cavity housing an electromagnet and a core, and an axial hole communicating with said first cavity and housing an anchor integral with a mobile plugging member; .
  • a nozzle secured to and projecting axially from said supporting body, and in which is formed an outlet hole communicating with said axial cavity and controlled by said plugging member; said plugging member being moved, by virtue of said electromagnet, between a first closed position, wherein it is pushed by a spring against a seat on said nozzle, thus closing said outlet hole, and an open position wherein said outlet hole is opened; characterised by the fact that said body presents a series of holes designed to enable external communication, through the lateral surface of said supporting body, of said axial hole formed inside said body.
  • valve according to the present invention will be described by way of example with reference to the accompanying drawing showing an axial section of the same.
  • the valve according to the present invention comprises a supporting body 1 defined by a substantially cylin­drical lateral surface 2, and having a first axial cavity 3 housing an electromagnet 4, and an axial hole communicating with said cavity 3.
  • Axial hole 6 on electromagnet 4 houses a core 7, while axial hole 5 houses an axially-sliding anchor 8 integral with a mobile plugging member 9.
  • Supporting body 1 is fitted with a nozzle 12 in which is formed a fuel outlet hole 13 controlled by plugging member 9.
  • plugging member 9 is conveniently integral with a rod 14 sliding axially inside a cylindrical seat 15 on nozzle 12, and guided by a pair of annular pro­jections 16 on which are formed flat portions 17, each defining a fuel passage together with the cylindrical surface of seat 15.
  • a spacer 18 is fitted between nozzle 12 and body 1, and nozzle 12 is secured to body 1 by permanently deforming the annular end edge 19 of body 1.
  • Anchor 8 is substantially tubular and secured to rod 14, e.g. by permanently deforming the end of anchor 8.
  • a helical spring 20 having one end resting on a push rod 22 force-­fitted inside an axial hole 23 on core 7, and designed to normally maintain plugging member 9 against a seat 24 upstream from fuel outlet hole 13.
  • supporting body 1 presents a series of holes 25 designed to enable external communication of axial hole 5 through lateral surface 2 of body 1. As shown in the drawing, said holes 25 consist of radial holes coming out inside cavity 3 of body 1.
  • Spacer 18 presents a slot 30 for connecting axial hole 5 to seat 15 inside nozzle 12 and, consequently, to fuel outlet hole 13.
  • the end of rod 14 presents at least one hole 31 for connecting the hole in anchor 8 to seat 15 of nozzle 12.
  • body 1 and part of nozzle 12 are conveniently covered by a plastic casing 35 having holes corresponding with holes 25. Between cover and body 1, there is provided a mesh filter 36.
  • the valve also comprises known electrical connecting members 38 for supplying electromagnet 4, a cap 39 for nozzle 12, and a sealing ring 40.
  • the valve according to the present invention operates as follows.
  • the valve according to the present invention When connected to a fuel circuit of the type shown in the drawing, the valve according to the present invention is housed inside a substantially cylindrical seat 45 having a hole 46 communicating with the manifold supplying the mixture to the engine.
  • a substantially cylindrical seat 45 having a hole 46 communicating with the manifold supplying the mixture to the engine.
  • pressure is exerted on the surface of hole 46 by sealing ring 40 which, together with a further sealing ring 48 between the valve and seat 45, seals the fuel inside seat 45.
  • Fuel is fed into seat 45 along a duct 49 preferably located in line with holes 25, and is drained from seat 45 by a further duct 50.
  • the fuel supplied by duct 49 is maintained at a pre-­determined pressure by a pressure regulator (not shown) on the fuel circuit upstream from duct 49.
  • the incoming fuel from duct 49 therefore fills seat 45 and enters the valve through holes 25, as shown by the black and white arrows in the drawing.
  • a first stream of fuel through holes 25 flows into cavity 3 and, through the hole in anchor 8 and the openings formed between anchor 8, core 7, body 1, spacer 18 and slot 30, into seat 15 on nozzle 12, and from there through the cavities formed between the flat portions of annular projections 16 and the surface of seat 15 to outlet hole 13.
  • a second stream of fuel through holes 25 flows into cavity 3 and, via the openings between core 7, anchor 8 and the surfaces of hole 5 in body 1 and hole 6 in electromagnet 4, flows over the outer surfaces of all the members inside cavity 3 and axial hole 5, and out along duct 50.
  • the presence of radial hole 32 in core 7 facilitates said passage.
  • Said first stream of fuel therefore substantially supplies outlet hole 13 along said route inside the valve, the reduced length and, consequently, reduced resistance of which provide for minimal load losses, so that the fuel at outlet hole 13 presents substantially the same pressure as inside supply duct 49.
  • said second stream of fuel flows through all the openings and holes inside body 1, particularly those at the top of the valve, thus providing for effective scavenging of any vapours formed inside the same.
  • valve according to the present invention has been found to overcome the drawbacks typically associated with known substantially axial fuel feed type valves, wherein the metering and atomizing efficiency of the valve is seriously impaired by the formation of vapours particularly at the top of the valve. Moreover, metering and atomizing performance is improved by virtue of the high, substantially constant fuel pressure maintained immediately upstream from outlet hole 13.

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)
EP89111393A 1988-06-23 1989-06-22 Elektromagnetisches Kraftstoffdosier- und Kraftstoffzerstäubungsventil Expired - Lifetime EP0347914B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT67589/88A IT1219396B (it) 1988-06-23 1988-06-23 Valvola per la dosatura e la polverizzazione di carburante ad azionamento elettromagnetico provvista di fori laterali di ingresso del carburante
IT6758988 1988-06-23

Publications (2)

Publication Number Publication Date
EP0347914A1 true EP0347914A1 (de) 1989-12-27
EP0347914B1 EP0347914B1 (de) 1994-03-02

Family

ID=11303672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89111393A Expired - Lifetime EP0347914B1 (de) 1988-06-23 1989-06-22 Elektromagnetisches Kraftstoffdosier- und Kraftstoffzerstäubungsventil

Country Status (4)

Country Link
EP (1) EP0347914B1 (de)
DE (1) DE68913368T2 (de)
ES (1) ES2051932T3 (de)
IT (1) IT1219396B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168857A (en) * 1990-11-19 1992-12-08 Ford Motor Company Integrally formed fuel rail/injectors and method for producing
US8434457B2 (en) 2010-06-29 2013-05-07 Caterpillar Inc. System and method for cooling fuel injectors

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2553834A1 (fr) * 1983-10-20 1985-04-26 Sibe Soupape d'injection pour moteur a combustion interne
EP0232475A1 (de) * 1986-01-31 1987-08-19 VDO Adolf Schindling AG Elektromagnetisch betätigbares Kraftstoffeinspritzventil
GB2187332A (en) * 1986-02-19 1987-09-03 Weber Srl Electromagnetic fuel metering and atomizing valve
GB2196181A (en) * 1984-03-05 1988-04-20 Gerhard Mesenich Electromagnetic injection valve
GB2198589A (en) * 1986-11-15 1988-06-15 Hitachi Ltd Electromagnetic fuel injectors
FR2616485A1 (fr) * 1987-06-09 1988-12-16 Weber Srl Valve d'atomisation et dosage de carburant pour un dispositif d'injection de carburant d'un moteur a combustion interne

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2553834A1 (fr) * 1983-10-20 1985-04-26 Sibe Soupape d'injection pour moteur a combustion interne
GB2196181A (en) * 1984-03-05 1988-04-20 Gerhard Mesenich Electromagnetic injection valve
EP0232475A1 (de) * 1986-01-31 1987-08-19 VDO Adolf Schindling AG Elektromagnetisch betätigbares Kraftstoffeinspritzventil
GB2187332A (en) * 1986-02-19 1987-09-03 Weber Srl Electromagnetic fuel metering and atomizing valve
GB2198589A (en) * 1986-11-15 1988-06-15 Hitachi Ltd Electromagnetic fuel injectors
FR2616485A1 (fr) * 1987-06-09 1988-12-16 Weber Srl Valve d'atomisation et dosage de carburant pour un dispositif d'injection de carburant d'un moteur a combustion interne

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 10, No. 138 (M-480)(2195) 21 May 1986; & JP,A,60 261 972 (MITSUBISHI JIDOSHA KOGYO) 25 December 1985, the whole document. *
PATENT ABSTRACTS OF JAPAN, Vol. 11, No. 397 (M-655)(2844) 25 December 1987; & JP,A,62 162 769 (HITACHI) 25 December 1985, the whole document. *
PATENT ABSTRACTS OF JAPAN, Vol. 9, No. 121 (M-382)(1844) 25 May 1985; & JP,A,60 006 065 (JIDOSHA KOGAI ANZEN KIKI GIJUTSU KENKYU KUMIAI) 12 January 1985, the whole document. *
PATENT ABSTRACTS OF JAPAN, Vol. 9, No. 220 (E-341)(1943) 06 September 1985; & JP,A,60 079 154 (NIPPON DENSO) 04 May 1985, the whole document. *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168857A (en) * 1990-11-19 1992-12-08 Ford Motor Company Integrally formed fuel rail/injectors and method for producing
US8434457B2 (en) 2010-06-29 2013-05-07 Caterpillar Inc. System and method for cooling fuel injectors
DE112011102211B4 (de) 2010-06-29 2019-01-03 Caterpillar Inc. System und Verfahren zum Kühlen von Brennstoffeinspritzvorrichtungen

Also Published As

Publication number Publication date
ES2051932T3 (es) 1994-07-01
EP0347914B1 (de) 1994-03-02
DE68913368D1 (de) 1994-04-07
IT1219396B (it) 1990-05-11
DE68913368T2 (de) 1994-06-01
IT8867589A0 (it) 1988-06-23

Similar Documents

Publication Publication Date Title
US4395988A (en) Fuel injection system
US5060868A (en) Electromagnetically actuatable valve
US4763635A (en) Discharge system for introducing volatilized fuel into an internal combustion engine
US5758865A (en) Fuel injection valve and engine including the same
US5884850A (en) Fuel injection valve
CZ20022963A3 (en) Fuel injection valve with a filter bush
US5018501A (en) Electromagnetic fuel injection valve apparatus
US5348233A (en) High volume gaseous fuel injector
US5934252A (en) Fuel injection system
EP0571418A1 (de) Magnetventilgesteuerte Tankreinigungsvorrichtung mit einer Verbesserung für langsame Motordrehzahl.
GB1076184A (en) Fuel injectors for internal combustion engines
US4678124A (en) Electromagnetically actuatable valve in particular a fuel injection valve
US3247833A (en) Fuel injection valves
EP0347916A1 (de) Elektromagnetisches Kraftstoffdosier- und Kraftstoffzerstäubungsventil
US4455982A (en) Electromagnetically actuatable valve
JPS5884281A (ja) 電磁操作弁
US5673853A (en) Electromagnetic fuel injector control valve
CZ20023456A3 (en) Fuel injection valve
US5641126A (en) Fuel injection systems with compact filter mountings
US4648559A (en) Electromagnetically actuatable fluid valve
US6764031B2 (en) Fuel injection valve
US5676345A (en) Electromagnetic valve
US4317542A (en) Fuel injector
EP0347914A1 (de) Elektromagnetisches Kraftstoffdosier- und Kraftstoffzerstäubungsventil
US20040026541A1 (en) Fuel injection valve

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB SE

17P Request for examination filed

Effective date: 19900529

17Q First examination report despatched

Effective date: 19910513

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19940302

REF Corresponds to:

Ref document number: 68913368

Country of ref document: DE

Date of ref document: 19940407

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940617

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940629

Year of fee payment: 6

Ref country code: ES

Payment date: 19940629

Year of fee payment: 6

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2051932

Country of ref document: ES

Kind code of ref document: T3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940830

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950622

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 19950623

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950622

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960301

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19991007

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19950630