EP0649983A1 - Elektromagnetisch betätigbares Kraftstoffdosier- und Zerstäubungsventil - Google Patents
Elektromagnetisch betätigbares Kraftstoffdosier- und Zerstäubungsventil Download PDFInfo
- Publication number
- EP0649983A1 EP0649983A1 EP94116845A EP94116845A EP0649983A1 EP 0649983 A1 EP0649983 A1 EP 0649983A1 EP 94116845 A EP94116845 A EP 94116845A EP 94116845 A EP94116845 A EP 94116845A EP 0649983 A1 EP0649983 A1 EP 0649983A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- former
- casing
- annular
- tubular
- 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
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
- 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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M51/0667—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 acting as a valve or having a short valve body attached thereto
Definitions
- the present invention relates to an electromagnetically actuated fuel metering and atomising valve, intended to be fitted to the fuel supply device of an internal combustion engine.
- valves of the above type include a man body internally housing an annular electromagnet, a core and a movable valve shutter element.
- the electromagnet consists of a support former and an electrical winding.
- a main disadvantage lies in the fact that the former and the main body are not directly fixed to each other, but are fixed indirectly by connection between the various fixed components of the valve. It is clear that clearances may exist between the former and the main body, which clearances could increase over time making the position of the electrical winding unstable relative to the axial air gap of the magnetic circuit defined in the valve. It is clear that this instability affects the axial component of the magnetic force controlling the stroke of the valve shutter element, meaning that for each similar command to the electromagnet the time taken for the valve shutter member to complete its stroke could be different. In addition, this clearance could compromise the fluid-tight seal of the valve as the seals would age prematurely as a result of the extra stress (vibration of the various elements) to which they were subjected.
- the object of the present invention is to provide an electromagnetically operated fuel metering and atomising valve free from the above disadvantages, that is to say one provided with a system which prevents clearances from forming and at the same time provides a reliable fluid-tight seal.
- An electromagnetically operated fuel metering and atomising valve manufactured according to the present invention and intended to be fitted in the fuel supply device of an internal combustion engine, includes: a tubular casing housing the lower portion of the said valve; an electromagnet consisting of a tubular forger and an electrical winding mounted in an annular seat formed within the interior of the said former; a tubular body with a lower portion made of ferromagnetic material to form the core of a magnetic circuit defined in the said valve; a movable valve shutter member operable to control the passage of fuel through an injection orifice; a movable tubular armature attracted by the said lower portion of the said body when the electromagnet is excited and supporting the said valve shutter member; a plate in which the injection orifice is formed; and a fuel inlet opening defined in the said body; characterised in that it includes an axial interlock between the said casing and the said former, this interlock having at least of a tongue formed in the said casing and a cavity formed in the said former and engaged by the said
- a magnetically actuated fuel metering and atomising valve is intended to be fitted in the fuel supply device of an internal combustion engine.
- the valve 1 comprises: a main body 2 forming a tubular casing for the lower part of the valve; an electromagnet 3 defined by a tubular former 4 and an electrical winding 5 mounted in an annular seat within the former 4; a tubular body 6 a lower portion of which is made of ferromagnetic material so as to form the core of a magnetic circuit defined in the valve 1; a movable valve shutter member 8 operable to control the passage of fuel through an injection orifice 11; a movable tubular armature 12 attracted by the portion 7 when the electromagnet 3 is excited and supporting the valve shutter member 8; a plate 13 with the injection orifice 11 formed therein; a fuel inlet 14 formed in an upper portion 15 of the body 6; and a filter 16 fitted in the inlet 14.
- the former 4 is constituted by two tubular parts 4a and 4b, securely fixed one within the other and made of plastics material, defining within them the seat for the winding 5.
- a body 17 extends obliquely upwards from an upper area of the outermost section 4b and constitutes an electrical connector as it houses blade-like pins 18 through which the winding 5 is supplied.
- a wall 19 extends upwardly from an upper area of the section 4b, in a position diametrically opposite the body 17.
- An annular recess 21 is formed in the inner surface of the upper end of the inner part 4a of the former 4 to house an annular seal 22 which is compressed radially by the portion 7 of the body 6.
- the seat for the seal 22 is closed at the top by an annular shoulder 23 formed in the body 6.
- the part 4a of the former 4 has an annular base wall from which an annular pressure foot 24 extends downwardly.
- two small part-annular grooves 25 are formed in the outer surface of the part 4b.
- one groove 25 is formed just beneath the lower end of the wall 19 and the other groove 25 is formed just beneath the lower end of the body 17.
- the portion 7 of the body 6 is installed within the former 4 and contains an annular pin 26 the function of which is to engage against a coil spring 27 arranged fitted betwen the pin 26 and the valve shutter member 8 which is defined by a small plate.
- the body 2 comprises: a lower portion 28 housing the plate 13; a central portion 31 having a smaller internal diameter than the portion 28 and within which the armature 12 and the valve shutter member 8 are slidable; and an upper portion 32 having a larger internal diameter than the portion 31 so as to define an annular wall 33 between the two.
- the former 4 is housed in the portion 32, and the annular base wall of the part 4a of the former 4 and the wall 33 define between them an annular seat in which is fitted an annular seal 29 which is compressed axially by the part 4a.
- the seat for the seal 29 is closed on the inside by the annular foot 24.
- the seal 29 is first placed on the wall 33 then the former 4 is fitted into the portion 32 of the body 2, taking care to orientate the former 4 in such a way that the wall 19 and the body 17 are in correspondence with a respective notch 34.
- the former 4 is then pressed against the wall 33 so as to compress the seal 29 in such a way that the tongues 36 are moved into correspondence with respective grooves 25.
- the invention provides a valve which is simple to manufacture and easy to assemble; it can be assembled with the use of automated machinery.
- the main advantage of the valve according to the present invention lies in having provided axial interlock between the valve casing and the electromagnet. This interlock enables the position of the electrical winding to be kept stable relative to the wall 33 and thus relative to the airgap of the magnetic circuit, this airgap being defined between the portion 7 of the body 6 and the armature 2.
- the seal 29 in addition to its role in providing an axial, and therefore particularly effective, fluid-tight seal, the seal 29 also acts as an axial spring, maintaining constant the pressure of the bottom of the grooves 25 against the lower edge of the tongues 36.
- the locking system between the casing and the electromagnet enables the size of the valve 1 to be kept compact.
- valve 1 as described and illustrated here without thereby departing from the protective scope of the present invention.
- interlocking system between the casing and the electromagnet may also be applied to valves which provide for the fuel to enter a central area.
- this locking system may be made differently from the way described above.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
- Magnetically Actuated Valves (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITBO930424 | 1993-10-26 | ||
IT93BO000424A IT1264720B1 (it) | 1993-10-26 | 1993-10-26 | Valvola dosatrice e polverizzatrice di carburante ad azionamento elettromagnetico. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0649983A1 true EP0649983A1 (de) | 1995-04-26 |
EP0649983B1 EP0649983B1 (de) | 1998-01-21 |
Family
ID=11339281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94116845A Expired - Lifetime EP0649983B1 (de) | 1993-10-26 | 1994-10-25 | Elektromagnetisch betätigbares Kraftstoffdosier- und Zerstäubungsventil |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0649983B1 (de) |
DE (1) | DE69408084T2 (de) |
ES (1) | ES2113029T3 (de) |
IT (1) | IT1264720B1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998005861A1 (de) * | 1996-08-02 | 1998-02-12 | Robert Bosch Gmbh | Brennstoffeinspritzventil und verfahren zur herstellung |
WO1999040315A1 (en) * | 1998-02-05 | 1999-08-12 | Siemens Automotive Corporation | Non-magnetic shell for welded fuel injector |
WO2002038942A1 (de) * | 2000-11-10 | 2002-05-16 | Siemens Aktiengesellschaft | Injektor zum einspritzen von kraftstoff in einen brennraum |
EP3301293A1 (de) * | 2016-09-30 | 2018-04-04 | Continental Automotive GmbH | Langer injektor für einen verbrennungsmotor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6939178B2 (en) * | 2003-12-31 | 2005-09-06 | Amphenol Corporation | Fuel injector connector |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB804116A (en) * | 1955-10-12 | 1958-11-05 | Cav Ltd | Liquid fuel injection nozzles for internal combustion engines |
JPS59203866A (ja) * | 1983-05-04 | 1984-11-19 | Nippon Denso Co Ltd | 電磁式燃料噴射弁 |
EP0536774A1 (de) * | 1991-10-11 | 1993-04-14 | WEBER S.r.l. | Elektromagnetisch betätigbares Kraftstoff-Zerstäubung- und Dosierventil mit sehr kleinen Ausmassen |
-
1993
- 1993-10-26 IT IT93BO000424A patent/IT1264720B1/it active IP Right Grant
-
1994
- 1994-10-25 DE DE69408084T patent/DE69408084T2/de not_active Expired - Lifetime
- 1994-10-25 ES ES94116845T patent/ES2113029T3/es not_active Expired - Lifetime
- 1994-10-25 EP EP94116845A patent/EP0649983B1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB804116A (en) * | 1955-10-12 | 1958-11-05 | Cav Ltd | Liquid fuel injection nozzles for internal combustion engines |
JPS59203866A (ja) * | 1983-05-04 | 1984-11-19 | Nippon Denso Co Ltd | 電磁式燃料噴射弁 |
EP0536774A1 (de) * | 1991-10-11 | 1993-04-14 | WEBER S.r.l. | Elektromagnetisch betätigbares Kraftstoff-Zerstäubung- und Dosierventil mit sehr kleinen Ausmassen |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 9, no. 73 (M - 368) 3 April 1985 (1985-04-03) * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998005861A1 (de) * | 1996-08-02 | 1998-02-12 | Robert Bosch Gmbh | Brennstoffeinspritzventil und verfahren zur herstellung |
WO1999040315A1 (en) * | 1998-02-05 | 1999-08-12 | Siemens Automotive Corporation | Non-magnetic shell for welded fuel injector |
WO2002038942A1 (de) * | 2000-11-10 | 2002-05-16 | Siemens Aktiengesellschaft | Injektor zum einspritzen von kraftstoff in einen brennraum |
EP3301293A1 (de) * | 2016-09-30 | 2018-04-04 | Continental Automotive GmbH | Langer injektor für einen verbrennungsmotor |
Also Published As
Publication number | Publication date |
---|---|
ITBO930424A0 (it) | 1993-10-26 |
EP0649983B1 (de) | 1998-01-21 |
DE69408084T2 (de) | 1998-06-10 |
DE69408084D1 (de) | 1998-02-26 |
IT1264720B1 (it) | 1996-10-04 |
ES2113029T3 (es) | 1998-04-16 |
ITBO930424A1 (it) | 1995-04-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5238224A (en) | Dry coil | |
US6501359B2 (en) | Electromagnetic actuator | |
US6119966A (en) | Fuel injection valve, pilot control valve therefor, and method for its assembly | |
US5244180A (en) | Solenoid pre-loader | |
CA1299038C (en) | Electromagnetic fuel injector and method of producing the same | |
RU2561355C2 (ru) | Дозатор топлива для системы впрыскивания топлива | |
US20020007549A1 (en) | Method for manufacturing electromagnetic operating apparatus | |
JP3508832B2 (ja) | ソレノイド弁 | |
JPS60256552A (ja) | 噴射弁 | |
US5427319A (en) | Fuel injector armature assembly | |
US5927614A (en) | Modular control valve for a fuel injector having magnetic isolation features | |
DE4443004A1 (de) | Elektromagnetisches Ventil zum Öffnen oder Schließen eines Fluidkanals | |
JPH0152587B2 (de) | ||
EP1001200B1 (de) | Elektromagnetventil | |
GB2173345A (en) | Electromagnetically actuable valve and method for its manufacture | |
US6955337B2 (en) | Pneumatic module | |
EP0616664B1 (de) | Dynamisches kalibrieren des durchflusses einer kraftstoffeinspritzdüse durch selektives ablenken des magnetischen flusses vom arbeitsspalt | |
US5465911A (en) | Angled terminal/coil design for small diameter fuel injector | |
EP0649983B1 (de) | Elektromagnetisch betätigbares Kraftstoffdosier- und Zerstäubungsventil | |
CN1292064A (zh) | 可电磁操纵的阀以及制造用于一个阀的磁壳的方法 | |
US5651530A (en) | Electromagnetically operated pressure switching valve | |
JP2007107652A (ja) | 電磁弁及びこの電磁弁の製造方法 | |
JPH04266674A (ja) | 電磁弁 | |
US6715509B2 (en) | Electromagnetic valve and assembling method | |
EP3667140A1 (de) | Magnetventil |
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 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: MAGNETI MARELLI S.P.A. |
|
17P | Request for examination filed |
Effective date: 19950512 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: CRISTIANI, MARCELLO Inventor name: VIGNOLI, MIRCO |
|
17Q | First examination report despatched |
Effective date: 19960731 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
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 |
|
REF | Corresponds to: |
Ref document number: 69408084 Country of ref document: DE Date of ref document: 19980226 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2113029 Country of ref document: ES Kind code of ref document: T3 |
|
ET | Fr: translation filed | ||
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 | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20090924 Year of fee payment: 16 Ref country code: GB Payment date: 20090928 Year of fee payment: 16 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20091006 Year of fee payment: 16 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20101025 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101025 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101026 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20111118 |
|
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 NON-PAYMENT OF DUE FEES Effective date: 20101026 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20131028 Year of fee payment: 20 Ref country code: DE Payment date: 20130920 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 69408084 Country of ref document: DE |