GB2033004A - Fluid injection valve - Google Patents
Fluid injection valve Download PDFInfo
- Publication number
- GB2033004A GB2033004A GB7933058A GB7933058A GB2033004A GB 2033004 A GB2033004 A GB 2033004A GB 7933058 A GB7933058 A GB 7933058A GB 7933058 A GB7933058 A GB 7933058A GB 2033004 A GB2033004 A GB 2033004A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fluid injection
- valve
- fluid
- valve element
- seating surface
- 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- Withdrawn
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 122
- 238000002347 injection Methods 0.000 title claims abstract description 85
- 239000007924 injection Substances 0.000 title claims abstract description 85
- 230000004043 responsiveness Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003019 stabilising effect Effects 0.000 description 1
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
- F02M61/188—Spherical or partly spherical shaped valve member ends
-
- 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
- F02M51/0632—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a spherically or partly spherically shaped armature, e.g. acting as valve body
-
- 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
- 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
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
-
- 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
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)
- Lift Valve (AREA)
- Nozzles (AREA)
Abstract
The valve seat has a substantially semi-spherical seating surface 26b and a spherical valve element 20 is seatable on the seating surface. A plurality of fluid injection nozzles 40 are formed to extend through the valve seat. <IMAGE>
Description
SPECIFICATION
Fluid injection valve
This invention relates to improvements in a ball type fluid injection valve including a ball or spherical valve element.
Ball type fluid injection valves including a ball or spherical valve element are advantageous, as compared with other type fluid injection valves including a valve element adapted to slide in a valve guide or body, in that they are operable at higher speed and with greater responsiveness. In such conventional ball type fluid injection valves, any attempt to meet requirements for greater responsiveness causes a corresponding reduction in the stability and the linearity of the flow characteristics of the fluid discharged therethrough. This arises mainly from the conventional valve structure wherein there is formed only one fluid injection nozzle.
It is therefore one object of the present invention to provide an improved fluid injection valve which can inject a controlled amount of fluid with great accuracy and great responsiveness.
According to the present invention, a fluid injection valve includes a valve seat having its upper portion contoured to form a substantially semi-spherical seating surface and a spherical valve element seatable on the seating surface, characterised in that a plurality of fluid injection nozzles is formed to extend through the valve seat.
The following explanation of a preferred embodiment of the present invention will help in the understanding thereof, when taken in conjunction with the accompanying drawings, which, however, should not be taken as limiting the present invention in any way, but which are given for purposes of illustration only and of which::
Figure 1 is a sectional view of a conventional fluid injection valve of the type including a ball valve element,
Figure 2 is an enlarged sectional view of a portion of the fluid injection valve of Fig. 1,
Figure 3 is an enlarged sectional view showng the significant portion of the fluid injection valve of the present invention,
Figure 4 is a bottom view of the valve seat of the fluid injection valve of Fig. 3, and
Figure 5 is a graph of drive pulse width versus injected fluid amount showing comparative performance of two fluid injection valves, one formed with a single fluid injection nozzle and the other formed with a plurality of fluid injection nozzles made in accordance with the present invention.
Prior to the description of the preferred embodiment of the present invention, the prior art fluid injection valve shown in Figs. 1 and 2 will be described briefly in order specifically to point out the difficulties attendant thereon.
The fluid injection valve shown in Figs. 1 and 2 is suitable for use in a fuel injection system and comprises a main pole 10 surrounded by a magnetising coil 12. The main pole 10 is formed with a fluid conduit 14 axially extending therethrough and opening into a fluid chamber 1 6 which is formed in the lower portion of the main pole 1 0. A plurality of fluid passages 1 8 extend transversely through the side wall of the fluid chamber 1 6.
The fluid injection valve also comprises a ball or spherical valve element 20 formed of magnetic material. The valve element 20 is located in the space defined by the main pole 10, a side pole 22, and a valve seat 24. The valve seat 24 has its upper portion contoured to form a semi-spherical or conically-tapered seating surface 26 and the main pole 10 has its lower portion shaped to form a partially spherical or conically-tapered seating surface 28 facing the seating surface 26. The valve seat 24 is formed centrally with a single fluid injection nozzle 30 extending therethrough in alignment with the axis of the valve.
When the magnetising coil 1 2 is energised, the valve element 20 is lifted from the seating surface 26 of the valve seat 24 and seated on the seating surface 28 of the main pole 10 and this allows flow of fluid through the fluid conduit 14 to the fluid chamber 1 6 and hence through the fluid passage 1 8 and the annular gap defined by the valve element 20 and the side pole 22 and injection of fluid through the fluid injection nozzle 30. The side pole 22 serves to centre the magnetic forces exerted on the valve element 20.
The amount of the fluid introduced into the fluid injection nozzle 30 varies depending on the lift H of the valve element 20 i.e. the distance of vertical movement of the valve element 30 lifted from the seating surface 26 and seated on the seating surface 28 when the magnetising coil 1 2 is energised. Thus, the lift H of the valve element 20 should be so selected as to permit a required amount of fluid to be injected through the fluid injection nozzle 30.Assuming now that D is the diameter of the fluid injection nozzle 30, the area of the peripheral surface of the cylinder existing between the opening of the fluid injection nozzle 30 and the valve element 20 seated on the seating surface 28 (hereinafter referred to as the fluid introduction area) is sTDH and the area of the opening of the fluid injection nozzle 30 (hereinafter referred to as the nozzle opening area) is 1sTD2. If the fluid introduction area DH is not sufficiently larger than the nozzle opening area 4sTD2, the amount of the fluid injected theough the fluid injection nozzle 30 will vary widely with variations on tolerance in the lift H of the valve element 30.
Moreover, since the valve element 20 is spherical and the seating surfaces 26 and 28 are of partially spherical or conically tapered shape, variations in the lift H of the valve element 20 are usually larger than variations occurring upon formation of the fluid injection nozzle 30. Accordingly, in order to stabilise the amount of the fluid injected through the fluid injection nozzle 30, the fluid introduction area 7TDH should be much larger than the nozzle opening area i7rD2; that is srDH i7rD2.
Solving this inequality for H gives
H D/4 (1)
This means that the lift H of the valve element 20 should be sufficiently larger than one fourth the diameter of the fluid injection nozzle 30. However, any attempt to increase the lift H of the valve element 20 will cause a corresponding reduction in the responsiveness, stability and durability of the fluid injection valve. Accordingly, it has been necessary to limit the fluid introduction area srDH to a small value so as to meet requirements for responsiveness at the sacriface of the stability of the amount of the fluid discharged through the valve.
Referring now to Figs. 3 and 4, there is illustrated one embodiment of a fluid injection nozzle made in accordance with the present invention which is generally the same as shown in Figs. 1 and 2 except that a plurality of fluid injection nozzles are formed in the valve seat 24. Accordingly, parts in Figs. 3 and 4 which are the same as parts in Figs. 1 and 2 have been given the same reference character. In the embodiment, a plurality of fluid injection nozzles 40 (8 nozzles in the illustrated case) is formed to extend through the valve seat 24.
Assuming that the number of the formed fluid injection nozzles 40 is n and the diameter of each of the openings of the fluid injection nozzles 40 is d, the total of the nozzle opening area is n/4sTd2 Since the total nozzle opening area corresponds to the nozzle opening area i7rD2 described in connection with the Figs. 1 and 2 fluid injection valve having a single fluid injection nozzle, n/4a7d2 = anD2.
Solving this equation for dives d = D/n (2) Assuming also that h is the lift of the valve element 20, the total of the fluid introduction area is nlTdh. Since the total fluid introduction area should be sufficiently larger than the total nozzle opening area in order to stabilize the amount of the fluid injection through the fluid injection nozzles 40, n7rdh n/47rd2 (3)
Substituting equation (2) into inequality (3), there is obtained n.h D/4 (4) Furthermore, between the limiting values required for stabilising the amount of the fluid discharged through the valves, the following relationship is given from inequalities (1) and (4):: H=g.h (5)
This equation shows that as compared with the lift H of the valve element 20 described in connection with the Figs. 1 and 2 fluid injection valve having a single fluid injection nozzle 30, the limiting value of the lift h of the valve element 20 can be reduced to H/V in a fluid injection valve having 8 fluid injection nozzles 40 as shown in Fig. 4, to H/'Y4 in a fluid injection valve having 4 fluid injection nozzles 40, and to H/ < 2 in a fluid injection valve having 1 2 fluid injection nozzles 40.
Accordingly, a fluid injection valve embodying the present invention has a valve element that is given a very smaller lift so as to provide increased responsive and durability with the same stability in the amount of the fluid discharged therethrough as compared with conventional fluid injection valves. Furthermore, if the importance of the responsive of the fluid injection valve and the lift h of the valve element is the same as one has been, the total fluid introduction area n7rdh is n times the fluid introduction area smDH to provide much higher stability as compared with conventional fluid injection valves.This is given by substituting equation (2) as nsTdh/7rDH = n.d/r.d = (6)
It is therefore apparent from equations (5) and (6) that a fluid injection valve embodying the present invention is remarkably improved both in responsive and stability as compared to conventional fluid injection valves if the lift h of the valve element is suitably selected to meet a condition of H/Vn < h < H.
In order to illustrate the effects obtainable by the present invention, reference is made to
Fig. 5. Here, the relative response of the fluid injection valves is compared by plotting the pulse width of the drive signal applied thereto against the amount of the petrol discharged therethrough. Curve X indicated by the broken line relates to a conventional fluid injection valve having a 5mm diameter ball valve element given a lift of 0.18mm and a 0.72mm diameter fluid injection nozzle. Curve Y indicated by the solid line relates to a fluid injection valve embodying the present invention and which has a 5mm diameter ball valve element given a lift of 0.088mm and four 0.36mm diameter fluid injection nozzles.As can be seen in Fig. 5, curve X becomes linear at a pulse width of 2.18meet and higher (or at a pulse frequency of 459 Hz and lower) and curve Y becomes linear at a pulse width of 1.60meet or higher (or at a pulse frequency of 625Hz or lower). Thus, the response of the fluid injection valve of the present invention is improved more than 30% as compared with the conventional fluid injection valve. A fluid injection valve having 8 fluid injection nozzles of 0.255mm in diameter and a valve element given a lift of 0.255mm had a response improved more than 50%. It is preferable that the ratio of the diameter of the valve element to the diameter of the fluid injection valves is selected to be less than 10% when considering the sealing property of the valve.
Since the fluid injection valve of the present invention has a plurality of fluid injection nozzles, the injected fluid (normally fuel) can be fully mixed with air, finely divided and fully distributed. Although the fluid injection nozzles 40 may extend through the valve seat 24 in parallel with the axis of the valve, they are preferably orientated to converge toward a point lying on the axis of the valve so as to enhance these effects.
Although the seating surface 26 of the valve seat 24 may have a radius of curvature equal to the radius of the valve element 20 in order to provide a good sealing property and stabilise the direction of movement of the valve element, fine dust passing a fluid filter (not shown) would adhere to the seating surface 26 to float the valve element 20 off the seating surface 26 thereby spoiling the sealing property and the stability in the direction of movement of the valve element.In order to eliminate such an undesirable possibility, the seating surface 26 is formed with a centre portion 26a having a radius Rs of curvature slightly smaller than the radius of curvature of the outside portion 26 b of the seating surface 26 surrounding the centre portion 26a so that a fluid pit 42 is formed between the seating surface 26b and the valve element 20 seated thereon and the fluid injection nozzles open into the fluid pit 42. The difference between the radii of curvature Rs and Rb is determined by the mesh of the fluid filter. For example, the depth of the fluid pit 42 is more than 20 microns if the fluid filter is adapted to pass dust less than 20 microns in size. Since the depth of the fluid pit 42 is very small, there is no possibility of fluid dropping when the valve is closed.
It is therefore apparent from the foregoing that there has been provided, in accordance with the present invention, a fluid injection having a plurality of fluid injection nozzles for injecting a controlled amount of fluid with
greater accuracy and greater responsive to a
drive signal having a wider range of frequen
cies. With the fluid injection valve of the
present invention, the fluid injected through the fuel injection nozzles can be fully mixed
with air, finely divided, and fully distributed.
While the present invention has been de
scribed in conjunction with a specific embodi
ment thereof, it is evident that many alterna
tives, modifications and variations will be ap
parent to those skilled in the art. Accordingly,
it is intended to embrace all alternatives,
modifications and variations that fall within
the spirit and broad scope of the appended
Claims (5)
1. A fluid injection valve including a valve
seat having its upper portion contoured to
form a substantially semispherical seating sur
face and a spherical valve element seatable on
said seating surface, characterised in that
there is a plurality of fluid injection nozzles
extending through said valve seat.
2. A fluid injection valve according to
claim 1, in which said fluid injection nozzles
extend in parallel with the axis of said valve.
3. A fluid injection valve according to
Claim 1, in which said fluid injection nozzles
converge towards a point lying on the axis of
said valve.
4. A fluid injection valve according to
claim 1, in which said seating surface has a
centre portion with a radius of curvature
slightly smaller than the radius of said valve
element and its outside portion with a radius
of curvature substantially equal to the radius
of said valve element so that a fluid pit is
formed between said seating surface and said
valve element seated thereon and said fluid
injection nozzles open into said fluid pit.
5. A fluid injection valve substantially as
herein described with reference to and as
illustrated by Figs. 3, 4 and 5 of the accom
panying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978130424U JPS5546576U (en) | 1978-09-22 | 1978-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2033004A true GB2033004A (en) | 1980-05-14 |
Family
ID=15033905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7933058A Withdrawn GB2033004A (en) | 1978-09-22 | 1979-09-24 | Fluid injection valve |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5546576U (en) |
| DE (1) | DE2938036A1 (en) |
| FR (1) | FR2436887A1 (en) |
| GB (1) | GB2033004A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4531678A (en) * | 1982-08-18 | 1985-07-30 | Robert Bosch Gmbh | Injection valve |
| US4531679A (en) * | 1981-04-29 | 1985-07-30 | Solex (U.K.) Limited | Electromagnetically-operable fluid injection |
| US4585174A (en) * | 1983-04-02 | 1986-04-29 | Robert Bosch Gmbh | Electro-magnetically operable valve |
| US5820032A (en) * | 1995-10-07 | 1998-10-13 | Robert Bosch Gmbh | Electromagnetically activated valve, particularly a fuel injection valve |
| FR2816992A1 (en) * | 2000-11-23 | 2002-05-24 | Bosch Gmbh Robert | I.c. engine fuel injector has discharge chamber linked to fuel return system and cavity in pintle with sealing ball connected to discharge chamber |
| WO2003033907A1 (en) * | 2001-10-13 | 2003-04-24 | Robert Bosch Gmbh | Fuel-injection valve |
| WO2004065783A1 (en) | 2003-01-17 | 2004-08-05 | Siemens Aktiengesellschaft | Valve and method for production of a valve |
| EP1867869A1 (en) * | 1997-11-26 | 2007-12-19 | Hitachi, Ltd. | Fuel injection valve |
| GB2552673A (en) * | 2016-08-02 | 2018-02-07 | Delphi Int Operations Luxembourg Sarl | SCR doser spray atomization |
| WO2019238329A1 (en) * | 2018-06-12 | 2019-12-19 | Robert Bosch Gmbh | Valve and high-pressure fuel pump and production thereof |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0348786B1 (en) * | 1988-06-28 | 1992-08-26 | Siemens Aktiengesellschaft | Electromagnetic fuel-injection valve |
| JP2518031Y2 (en) * | 1990-12-19 | 1996-11-20 | 株式会社ユニシアジェックス | Fuel injection valve |
| JP2568323B2 (en) * | 1991-06-28 | 1997-01-08 | 株式会社日立製作所 | Nozzle with valve seat, method of manufacturing the same, and solenoid valve |
| DE4141930B4 (en) * | 1991-12-19 | 2007-02-08 | Robert Bosch Gmbh | Electromagnetically actuated injection valve |
| DE4445358A1 (en) * | 1994-12-20 | 1996-06-27 | Bosch Gmbh Robert | Valve and method of making a valve |
| DE102019107836A1 (en) * | 2018-06-12 | 2019-12-12 | Marco Systemanalyse Und Entwicklung Gmbh | Jet valve |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB350731A (en) * | 1930-06-19 | 1931-06-18 | Arthur Robinson Kirkham | Improvements in fuel sprayers for internal combustion engines |
| GB348958A (en) * | 1930-07-18 | 1931-05-21 | Herbert Vincent Senior | Improvements in fuel injection devices for internal combustion engines |
| FR779565A (en) * | 1933-10-12 | 1935-04-09 | Prec Mecanique | Improvements made to injector devices, especially those for internal combustion engines |
| NL53757C (en) * | 1939-01-20 | |||
| FR2166734A5 (en) * | 1972-01-06 | 1973-08-17 | Peugeot & Renault | |
| FR2180753A1 (en) * | 1972-12-01 | 1973-11-30 | Plessey Handel Investment Ag | |
| US4030668A (en) * | 1976-06-17 | 1977-06-21 | The Bendix Corporation | Electromagnetically operated fuel injection valve |
-
1978
- 1978-09-22 JP JP1978130424U patent/JPS5546576U/ja active Pending
-
1979
- 1979-09-20 FR FR7923478A patent/FR2436887A1/en active Pending
- 1979-09-20 DE DE19792938036 patent/DE2938036A1/en active Pending
- 1979-09-24 GB GB7933058A patent/GB2033004A/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4531679A (en) * | 1981-04-29 | 1985-07-30 | Solex (U.K.) Limited | Electromagnetically-operable fluid injection |
| US4531678A (en) * | 1982-08-18 | 1985-07-30 | Robert Bosch Gmbh | Injection valve |
| US4585174A (en) * | 1983-04-02 | 1986-04-29 | Robert Bosch Gmbh | Electro-magnetically operable valve |
| US5820032A (en) * | 1995-10-07 | 1998-10-13 | Robert Bosch Gmbh | Electromagnetically activated valve, particularly a fuel injection valve |
| EP1867869A1 (en) * | 1997-11-26 | 2007-12-19 | Hitachi, Ltd. | Fuel injection valve |
| FR2816992A1 (en) * | 2000-11-23 | 2002-05-24 | Bosch Gmbh Robert | I.c. engine fuel injector has discharge chamber linked to fuel return system and cavity in pintle with sealing ball connected to discharge chamber |
| WO2003033907A1 (en) * | 2001-10-13 | 2003-04-24 | Robert Bosch Gmbh | Fuel-injection valve |
| WO2004065783A1 (en) | 2003-01-17 | 2004-08-05 | Siemens Aktiengesellschaft | Valve and method for production of a valve |
| GB2552673A (en) * | 2016-08-02 | 2018-02-07 | Delphi Int Operations Luxembourg Sarl | SCR doser spray atomization |
| GB2552673B (en) * | 2016-08-02 | 2020-02-19 | Delphi Tech Ip Ltd | SCR doser spray atomization |
| WO2019238329A1 (en) * | 2018-06-12 | 2019-12-19 | Robert Bosch Gmbh | Valve and high-pressure fuel pump and production thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2436887A1 (en) | 1980-04-18 |
| JPS5546576U (en) | 1980-03-26 |
| DE2938036A1 (en) | 1980-03-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |