EP1712776A1 - Valve body and fluid injector with a valve body - Google Patents
Valve body and fluid injector with a valve body Download PDFInfo
- Publication number
- EP1712776A1 EP1712776A1 EP05008192A EP05008192A EP1712776A1 EP 1712776 A1 EP1712776 A1 EP 1712776A1 EP 05008192 A EP05008192 A EP 05008192A EP 05008192 A EP05008192 A EP 05008192A EP 1712776 A1 EP1712776 A1 EP 1712776A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sack
- disc
- needle
- valve body
- seat
- 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
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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
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1853—Orifice plates
-
- 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
- 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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- 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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/188—Spherical or partly spherical shaped valve member ends
Definitions
- the invention relates to a valve body and a fluid injector.
- the valve body comprises a needle and a cartridge with a recess, which takes in the needle and which comprises on one of its ends a seat plate, that comprises a needle seat for the inward-opening needle.
- Fluid injectors in particular fuel injectors for diesel or gasoline internal combustion engines, comprise a housing, an actuator unit and a valve body. In the case of an inward-opening needle the needle controls the flow of the fluid into a sack volume, which leads to a nozzle.
- fluid injectors in particular fuel injectors for internal combustion engines, are arranged in a cylinder head of the internal combustion engine in a way, that they inject the fuel directly into a combustion chamber of the engine.
- fluid pressure may reach up to 200 bars
- fluid pressure may reach up to 2000 bars.
- the object of the invention is to create a valve body and a fluid injector, which enabables simply an intended fluid atomization.
- the object concerning the valve body is achieved by the features of claim 1.
- the object concerning the fluid injector is achieved by the features of claim 6.
- Advantageous embodiments of the invention are given in the subclaims.
- the invention is distinguished by a valve body with a needle and a cartridge.
- the recess takes in the needle and comprises on one of its ends a seat plate.
- the seat plate comprises a needle seat for the inward opening needle, with the needle further comprising a seat part with a sealing area that is designed to rest on the needle seat.
- At least one sack disc is fixed to the seat plate and restricts a sack volume in conjunction with the seat plate and the seat part of the needle.
- Each sack disc comprises a sack disc recess in order to modify the sack volume.
- An orifice disc is arranged facing away from the sack volume related to the sack disc, and the orifice disc comprises a nozzle.
- the invention concerning the fluid injector is distinguished by a fluid injector with a housing, an actuator unit and the valve body.
- the sack disc recess forms a spherical free volume. While operating the injector the spherical free volume produces vortices in fluid which enables an intended atomization of the fluid.
- the sack disc recess forms a cylindrical free volume.
- a cylindrical free volume in the sack disc easily increases the sack volume.
- the sack disc comprises a dowel pin hole.
- the dowel pin hole enables easy assembling of the sack disc, further sack discs and/or the orifice disc.
- the sack disc, further sack discs and/or the orifice disc are laser-welded. This enables easy assembling of the sack disc.
- a fluid injector that is used as a fuel injector for an internal combustion engine, comprises a housing 1, a valve body 2, an actuator unit and a fuel connector ( Figure 1).
- the fuel connector is designed to be connected to a high pressure fuel chamber of the internal combustion engine, where fuel is stored under high pressure, for example under the pressure of about 200 bar.
- the housing 1 is preferably formed in a way, that there is a space to lead the fuel from the fuel connector to a fuel inlet of the valve body.
- the actuator unit is preferably arranged in the housing.
- the actuator unit may be of a type known to a person skilled in the art, that is suitable for that purpose. It may, for example, contain a piezoelectric actuator. However, it may alternatively contain an electromagnetic actuator, that comprises an armature 31, a solenoid 32 and a pole element 33. A return spring 25 is arranged and pre-loaded in such a way, that it pushes the armature 31 away from the pole element 33 unless an electromagnetic force created by the solenoid 32 is larger than the pre-loading force of the return spring 25.
- the valve body 2 comprises a cartridge 21, which is fixed to the housing 1 at one of its free ends, preferably by welding, especially by laser-welding.
- the cartridge 21 comprises a recess 23, which takes in a needle 22 and also serves as a fluid duct.
- the recess 23 of the cartridge 21 takes in on one of its ends a seat plate 27, which comprises in a conically-shaped area a needle seat 29 for the inward-opening needle 22.
- the needle 22 comprises a seat part 24 with a sealing area, that is destined to rest on the needle seat 29, if the seat part 24 is pushed against the needle seat 29.
- the needle 22 is mechanically coupled to the armature 31.
- the seat part 24 of the needle 22 may be spherically-shaped, which improves the sealing quality between the seat part 24 and the sealing area of the needle seat 29.
- the spherical shape can be easily obtained by forming the seat part 24 out of a ball with a hole, where the needle 22 is taken in.
- the ball is preferably fixed to the needle 22 by welding.
- a sack volume 35 which is limited by respective walls of the seat plate 27 and by a sack disc 39, which has a recess 40.
- the sack disc 39 comprises a sack disc recess 40.
- the sack disc recess 40 increases the sack volume 35. This offers the possibility to form different sack volume 35 shapes just by changing the sack disc 39.
- the fluid atomization is strongly dependent on the shape and size of the sack volume 35.
- the orifice disc 37 and/or the sack disc 39 comprise at least one hole 43 for a dowel pin.
- the dowel pin is arranged in the dowel pin hole 43.
- the orifice disc 37 and the sack disc 39 preferably are laser-welded. They may be also fixed in a different way.
- the multiple sack discs 39a,b,c,d comprise multiple sack disc recesses 40a,b,c,d. This easily increases the possibility of influencing the sack volume 35. Also a plurality of different sack volume 35 shapes and dependent on this different spray atomizations are feasible.
- the sack disc recesses 40a,b,c,d for example can form a spherical free volume ( Figure 2). This embodiment will create turbulences in the fluid, which increases atiomzaion of the fluid.
- the sack disc recesses 40a,b,c,d form a conical shaped free Volume ( Figure 3) preferably with steps from one sack disc 39a,b,c,d to the other.
- the corners of the steps create areas of fast fluid flow and also areas of slow fluid flow. At the borders of those areas evolve turbulences in the fluid, which increases fluid atomization.
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)
Abstract
Description
- The invention relates to a valve body and a fluid injector. The valve body comprises a needle and a cartridge with a recess, which takes in the needle and which comprises on one of its ends a seat plate, that comprises a needle seat for the inward-opening needle. Fluid injectors, in particular fuel injectors for diesel or gasoline internal combustion engines, comprise a housing, an actuator unit and a valve body. In the case of an inward-opening needle the needle controls the flow of the fluid into a sack volume, which leads to a nozzle.
- In order to meet the requirements of strict emission legislation and in order to save fuel consumption fluid injectors, in particular fuel injectors for internal combustion engines, are arranged in a cylinder head of the internal combustion engine in a way, that they inject the fuel directly into a combustion chamber of the engine. In order to get a very fine atomization of the fluid in such applications it is necessary to provide the fluid under high pressure. In gasoline internal combustion engines the fluid pressure may reach up to 200 bars, in diesel engines fluid pressure may reach up to 2000 bars.
- The object of the invention is to create a valve body and a fluid injector, which enabables simply an intended fluid atomization.
- The object concerning the valve body is achieved by the features of claim 1. The object concerning the fluid injector is achieved by the features of claim 6. Advantageous embodiments of the invention are given in the subclaims.
- The invention is distinguished by a valve body with a needle and a cartridge. The recess takes in the needle and comprises on one of its ends a seat plate. The seat plate comprises a needle seat for the inward opening needle, with the needle further comprising a seat part with a sealing area that is designed to rest on the needle seat. At least one sack disc is fixed to the seat plate and restricts a sack volume in conjunction with the seat plate and the seat part of the needle. Each sack disc comprises a sack disc recess in order to modify the sack volume. An orifice disc is arranged facing away from the sack volume related to the sack disc, and the orifice disc comprises a nozzle.
- The invention concerning the fluid injector is distinguished by a fluid injector with a housing, an actuator unit and the valve body.
- In an advantageous embodiment of the valve body the sack disc recess forms a spherical free volume. While operating the injector the spherical free volume produces vortices in fluid which enables an intended atomization of the fluid.
- In a further advantageous embodiment of the valve body the sack disc recess forms a cylindrical free volume. A cylindrical free volume in the sack disc easily increases the sack volume.
- In a further advantageous embodiment of the valve body the sack disc comprises a dowel pin hole. The dowel pin hole enables easy assembling of the sack disc, further sack discs and/or the orifice disc.
- In a further advantageous embodiment of the valve body the sack disc, further sack discs and/or the orifice disc are laser-welded. This enables easy assembling of the sack disc.
- Exemplary embodiments of the invention are explained in the following with the aid of schematic drawings. These are as follows:
- Figure 1
- a first embodiment of a fluid injector with a valve body,
- Figure 2
- an enlargement of the valve body according to Figure 1 with a first embodiment of sack discs,
- Figure 3
- an enlargement of the valve body according to Figure 1 with a second embodiment of the sack discs.
- Elements of the same design and function that occur in the different illustrations are identified by the same reference character.
- A fluid injector, that is used as a fuel injector for an internal combustion engine, comprises a housing 1, a valve body 2, an actuator unit and a fuel connector (Figure 1). The fuel connector is designed to be connected to a high pressure fuel chamber of the internal combustion engine, where fuel is stored under high pressure, for example under the pressure of about 200 bar.
- The housing 1 is preferably formed in a way, that there is a space to lead the fuel from the fuel connector to a fuel inlet of the valve body.
- The actuator unit is preferably arranged in the housing. The actuator unit may be of a type known to a person skilled in the art, that is suitable for that purpose. It may, for example, contain a piezoelectric actuator. However, it may alternatively contain an electromagnetic actuator, that comprises an
armature 31, asolenoid 32 and apole element 33. Areturn spring 25 is arranged and pre-loaded in such a way, that it pushes thearmature 31 away from thepole element 33 unless an electromagnetic force created by thesolenoid 32 is larger than the pre-loading force of thereturn spring 25. - The valve body 2 comprises a
cartridge 21, which is fixed to the housing 1 at one of its free ends, preferably by welding, especially by laser-welding. Thecartridge 21 comprises arecess 23, which takes in aneedle 22 and also serves as a fluid duct. Therecess 23 of thecartridge 21 takes in on one of its ends aseat plate 27, which comprises in a conically-shaped area aneedle seat 29 for the inward-opening needle 22. Theneedle 22 comprises aseat part 24 with a sealing area, that is destined to rest on theneedle seat 29, if theseat part 24 is pushed against theneedle seat 29. Theneedle 22 is mechanically coupled to thearmature 31. - The
seat part 24 of theneedle 22 may be spherically-shaped, which improves the sealing quality between theseat part 24 and the sealing area of theneedle seat 29. The spherical shape can be easily obtained by forming theseat part 24 out of a ball with a hole, where theneedle 22 is taken in. The ball is preferably fixed to theneedle 22 by welding. - If the
needle 22 rests with the sealing area of itsseat part 24 in theneedle seat 27, fluid is prevented from flowing into asack volume 35, which is limited by respective walls of theseat plate 27 and by asack disc 39, which has arecess 40. On that side of thesack disc 39, which is facing away from thesack volume 35, there is anorifice disc 37, which comprises at least onenozzle 41 through which the fluid can flow out of the valve body 2 from thesack volume 35. Thesack disc 39 comprises asack disc recess 40. The sack disc recess 40 increases thesack volume 35. This offers the possibility to formdifferent sack volume 35 shapes just by changing thesack disc 39. The fluid atomization is strongly dependent on the shape and size of thesack volume 35. - It is advantegous for the assembling of the
orifice disc 37 and/or thesack disc 39, if theorifice disc 37 and/or thesack disc 39 comprise at least onehole 43 for a dowel pin. To adjust theorifice disc 37 and thesack disc 39, the dowel pin is arranged in thedowel pin hole 43. Theorifice disc 37 and thesack disc 39 preferably are laser-welded. They may be also fixed in a different way. - It is possible to put
multiple sack discs 39a,b,c,d between theorifice disc 37 and theseat plate 27. Themultiple sack discs 39a,b,c,d comprise multiplesack disc recesses 40a,b,c,d. This easily increases the possibility of influencing thesack volume 35. Also a plurality ofdifferent sack volume 35 shapes and dependent on this different spray atomizations are feasible. Thesack disc recesses 40a,b,c,d for example can form a spherical free volume (Figure 2). This embodiment will create turbulences in the fluid, which increases atiomzaion of the fluid. In an other embodiment thesack disc recesses 40a,b,c,d form a conical shaped free Volume (Figure 3) preferably with steps from onesack disc 39a,b,c,d to the other. The corners of the steps create areas of fast fluid flow and also areas of slow fluid flow. At the borders of those areas evolve turbulences in the fluid, which increases fluid atomization.
Claims (6)
- Valve body (2) with a needle (22) and a cartridge (21) with a recess (23), which takes in the needle (22) and which comprises on one of its ends a seat plate (27), that comprises a needle seat (29) for the inward opening needle (22), with the needle (22) further comprising a seat-part (24) with a sealing area, that is destined to rest on the needle seat (29), and with at least one sack-disc (39a), which is fixed to the seat plate (27) and which restricts a sack volume (35) in conjunction with the seat plate (27) and the seat part (24) of the needle (22), each sack-disc (39a) comprising a sack-disc recess (40a) in order to modify the sack volume (35), and with an orifice disc (37), which is arranged facing away from the sack volume (35) related to the sack-disc (40a), and with the orifice disc (37) comprising a nozzle (41).
- Valve body (2) in accordance with claim 1 with the sack-disc recess (40a) forming a spherical free volume.
- Valve body (2) in accordance with one of the preceding claims with the sack-disc recess (40a) forming a conical free volume.
- Valve body (2) in accordance with one of the preceding claims with the sack-disc (39a) comprising a dowel pin hole (43).
- Valve body (2) in accordance with one of the preceding claims with the sack-disc (39a) and/or the orifice disc (37) being laser welded.
- Fluid injector with a housing (1), an actuator unit and a valve body (2) in accordance with one of the preceding claims.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20050008192 EP1712776B1 (en) | 2005-04-14 | 2005-04-14 | Valve body and fluid injector with a valve body |
DE200560007856 DE602005007856D1 (en) | 2005-04-14 | 2005-04-14 | Valve body and liquid injector with valve body |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20050008192 EP1712776B1 (en) | 2005-04-14 | 2005-04-14 | Valve body and fluid injector with a valve body |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1712776A1 true EP1712776A1 (en) | 2006-10-18 |
EP1712776B1 EP1712776B1 (en) | 2008-07-02 |
Family
ID=34935181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20050008192 Expired - Fee Related EP1712776B1 (en) | 2005-04-14 | 2005-04-14 | Valve body and fluid injector with a valve body |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1712776B1 (en) |
DE (1) | DE602005007856D1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019199838A (en) * | 2018-05-17 | 2019-11-21 | 愛三工業株式会社 | Fuel injection valve |
WO2022254981A1 (en) * | 2021-06-03 | 2022-12-08 | 日立Astemo株式会社 | Fuel injection valve |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4101074A (en) * | 1976-06-17 | 1978-07-18 | The Bendix Corporation | Fuel inlet assembly for a fuel injection valve |
EP0404407A1 (en) * | 1989-06-23 | 1990-12-27 | Lucas Industries Public Limited Company | Fuel injection nozzle |
US5335864A (en) * | 1991-07-17 | 1994-08-09 | Robert Bosch Gmbh | Fuel-injection valve |
JP2002115628A (en) * | 2000-10-10 | 2002-04-19 | Nippon Soken Inc | Fuel injection valve and internal combustion engine |
US20030164412A1 (en) * | 2002-03-04 | 2003-09-04 | Aisan Kogyo Kabushiki Kaisha | Orifice plate |
-
2005
- 2005-04-14 DE DE200560007856 patent/DE602005007856D1/en not_active Expired - Fee Related
- 2005-04-14 EP EP20050008192 patent/EP1712776B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4101074A (en) * | 1976-06-17 | 1978-07-18 | The Bendix Corporation | Fuel inlet assembly for a fuel injection valve |
EP0404407A1 (en) * | 1989-06-23 | 1990-12-27 | Lucas Industries Public Limited Company | Fuel injection nozzle |
US5335864A (en) * | 1991-07-17 | 1994-08-09 | Robert Bosch Gmbh | Fuel-injection valve |
JP2002115628A (en) * | 2000-10-10 | 2002-04-19 | Nippon Soken Inc | Fuel injection valve and internal combustion engine |
US20030164412A1 (en) * | 2002-03-04 | 2003-09-04 | Aisan Kogyo Kabushiki Kaisha | Orifice plate |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 08 5 August 2002 (2002-08-05) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019199838A (en) * | 2018-05-17 | 2019-11-21 | 愛三工業株式会社 | Fuel injection valve |
WO2022254981A1 (en) * | 2021-06-03 | 2022-12-08 | 日立Astemo株式会社 | Fuel injection valve |
Also Published As
Publication number | Publication date |
---|---|
DE602005007856D1 (en) | 2008-08-14 |
EP1712776B1 (en) | 2008-07-02 |
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