EP1391607A1 - Metering device - Google Patents
Metering device Download PDFInfo
- Publication number
- EP1391607A1 EP1391607A1 EP02018663A EP02018663A EP1391607A1 EP 1391607 A1 EP1391607 A1 EP 1391607A1 EP 02018663 A EP02018663 A EP 02018663A EP 02018663 A EP02018663 A EP 02018663A EP 1391607 A1 EP1391607 A1 EP 1391607A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- outlet passage
- housing
- metering device
- supply duct
- 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- Withdrawn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 claims abstract description 42
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims abstract description 6
- 239000000446 fuel Substances 0.000 claims abstract description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000037361 pathway Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
-
- 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
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
-
- 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
Definitions
- the present invention relates to a metering device for dosing pressurized fluids, particularly an injection valve for a fuel injection system in an internal combustion engine.
- the metering device is of the type which comprises an axially extending housing having an end part provided with an outlet passage terminating with a metering opening and a fluid inlet for supplying the fluid under pressure arranged at the end part of the housing opposite to the end part provided with the outlet passage, an axially moveable valve needle passing through the outlet passage and controlling opening and closing of the metering opening by its axial movement, a piezoelectric actuator assembly in axial alignment with the valve needle and cooperating with the valve needle to control its axial movement, and a fluid supply duct communicating with the fluid inlet and the outlet passage for transmitting the pressurized fluid to be dosed to the outlet passage.
- the housing includes a fluid chamber containing the pressurized gasoline which communicates via a line borehole with a fluid inlet.
- the pressure of the gasoline in such injector valves is of the order of 200 bar. Because of the axial movements of the injector needle as it opens and closes the gap to allow the gasoline into the engine cylinder, the gasoline contained inside the injector is subjected to pressure peaks of between 20% and 50% compared with the above mentioned nominal value. These pressure fluctuations can overload elastic sealings of the valve body, separating the high pressure gasoline chamber from an actuator chamber at a lower pressure.
- the fluid supply duct forms an axially extended annular supply duct within the housing that extends down to the outlet passage (20).
- the volume of gasoline proximate to the valve body can be greatly increased, thus damping the pressure peaks arising form the opening/closing actions of the valve needle.
- Furthermore conducts connecting the supply duct with the outlet passage can easily be made in the outlet passage, e. g. by simply drilling holes in the outlet passage. This enables a cheap and reliable manufacturing process of the metering device.
- the housing comprises an inner tubular member containing the piezoelectric actuator assembly and an outer tubular member surrounding the inner tubular member and forming the outer jacket of the housing, wherein the fluid supply duct is formed between the inner tubular member and the outer tubular member.
- annular fluid supply duct extends axially from the fluid inlet of the injector through fluid admission holes to the outlet passage.
- the annular fluid supply duct extends axially over more than 20%, preferably over more than 30%, more preferably over more than 40% of the axial extension of the housing. This measure ensures a gasoline space of a large volume near the valve body.
- the fluid inlet is formed by a fluid entry duct, arranged as a separate element at the end part of the housing opposite to the end part provided with the outlet passage.
- the fluid inlet may be formed by a fluid entry duct integral with the inner tubular member. Thereby the number of parts is reduced and the assembly of the parts is simplified.
- the housing comprises an outer flange for installing the metering device to a cylinder head of an internal combustion engine.
- the metering device advantageously comprises spring means for urging the valve needle in the closing position and means for transmitting an axial extension of the piezoelectric actuator assembly to the valve needle to displace the needle from the closing position when activated.
- Figure 1 shows an injection valve for direct-injection gasoline engines, generally designated by 10.
- the injection valve has a housing 12, which comprises an outer tubular member 121 and an inner tubular member 123.
- the outer tubular member 121 forms the outer jacket of the injection valve 10, and the inner tubular member 123 contains the piezoelectric actuator assembly 30.
- the passage 14 formed between the outer tubular member 121 and the inner tubular member 123 provides a large annular pathway which transports the gasoline supplied by the gasoline entry duct 16 to the gasoline admission holes 28 and into the outlet passage 20 described below.
- the valve body has an axial outlet passage 20 projecting through the lower part of the housing 12 and terminating in a metering opening 22.
- the metering opening 22 is surrounded by a valve seat 26 which is opened or closed by the axial movement of the valve needle 24 passing through the outlet passage 20.
- the closed state of the injection valve 10, where the needle 24 is pressed against the valve seat 26 is provided by the biased pressure of a helical spring 34 which rests on a snap ring 32.
- a piezoelectric actuator which forms part of the piezoelectric actuator assembly 30 is activated. If an excitation voltage is applied to the piezoelectric actuator, it increases in length in axial direction by a predetermined amount, typically about several tens of micrometers. This extension in length is transmitted to the valve needle 24 which depresses the biasing spring 34 and lifts from the valve seat 26. In this position, the injection of pressurized gasoline in the cylinder starts.
- a thermal compensator 36 is provided to fix the position of the piezoelectric actuator assembly 30 during fast changes of its length, but compensates for slow changes in the position of the piezoelectric actuator assembly 30 due to, for example, thermal changes.
- the passage 14 forms a large annular pathway for the gasoline. Because of its large axial and annular extent, the passage 14 has a large volume compared to conventional gasoline supply ducts. The large volume of passage 14 limits the value of the peaks of pressure fluctuations arising from the opening and closing of the metering opening 22. Thus, the provision of the passage 14 leads to a stabilizing effect on the gasoline pressure.
- FIG. 2 shows another embodiment of an injector 40 according to the invention. Elements which are similar to elements of Fig. 1 are designated by the same reference numerals and their discussion is omitted. While the embodiment of Fig. 1 shows the gasoline entry duct 16 to be a separate element, Fig. 2 shows an embodiment where the gasoline entry duct 161 is integral with the inner tubular member 123. As the inner tubular member 123 and the gasoline entry duct 161 are formed in one piece the number of mechanical parts is reduced. Also, in this embodiment, the thermal compensator 36 is arranged in the lower part of the housing 12, just above the snap ring 32.
- FIG. 3 A further improvement of the embodiment of Fig. 2 is shown in Fig. 3.
- the injector 50 has an outer flange 42 for fixing the injector 50 to a cylinder head of an internal combustion engine.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a metering device for dosing pressurized
fluids, particularly an injection valve for a fuel
injection system in an internal combustion engine, comprising
an axially extending housing (12) having an end part provided
with an outlet passage (20) terminating with a metering opening
(22) and a fluid inlet (16; 161) for supplying the fluid
under pressure, arranged at the end part of the housing (12)
opposite to the end part provided with the outlet passage
(20), an axially moveable valve needle (24) passing through
the outlet passage (20) and controlling opening and closing
of the metering opening (22) by its axial movement, a piezoelectric
actuator assembly (30) in axial alignment with the
valve needle (24) and cooperating with the valve needle (24)
to control its axial movement, and a fluid supply duct (14)
communicating with the fluid inlet (16; 161) and the outlet
passage (20) for transmitting the pressurized fluid to be
dosed to the outlet passage (20). According to the invention
the fluid supply duct forms an axially extended annular supply
duct (14) within the housing (12).
Description
The present invention relates to a metering device for dosing
pressurized fluids, particularly an injection valve for a
fuel injection system in an internal combustion engine. The
metering device is of the type which comprises an axially extending
housing having an end part provided with an outlet
passage terminating with a metering opening and a fluid inlet
for supplying the fluid under pressure arranged at the end
part of the housing opposite to the end part provided with
the outlet passage, an axially moveable valve needle passing
through the outlet passage and controlling opening and closing
of the metering opening by its axial movement, a piezoelectric
actuator assembly in axial alignment with the valve
needle and cooperating with the valve needle to control its
axial movement, and a fluid supply duct communicating with
the fluid inlet and the outlet passage for transmitting the
pressurized fluid to be dosed to the outlet passage.
Such an injection valve is disclosed for example in the European
Patent application EP 1 046 809 A2. In this known type
of injection valve, the housing includes a fluid chamber containing
the pressurized gasoline which communicates via a
line borehole with a fluid inlet.
The pressure of the gasoline in such injector valves is of
the order of 200 bar. Because of the axial movements of the
injector needle as it opens and closes the gap to allow the
gasoline into the engine cylinder, the gasoline contained inside
the injector is subjected to pressure peaks of between
20% and 50% compared with the above mentioned nominal value.
These pressure fluctuations can overload elastic sealings of
the valve body, separating the high pressure gasoline chamber
from an actuator chamber at a lower pressure.
In view of the foregoing, it is an object of the present invention
to improve known metering devices in such a way that
the sensibility of the metering device to pressure fluctuations
and the risk of gasoline leakage is reduced.
This object is achieved by a metering device with the features
of appended claim 1. Advantageous embodiments of the
invention are disclosed in the dependent claims.
According to the invention, in a metering device of the type
mentioned above, the fluid supply duct forms an axially extended
annular supply duct within the housing that extends
down to the outlet passage (20). Thereby the volume of gasoline
proximate to the valve body can be greatly increased,
thus damping the pressure peaks arising form the opening/closing
actions of the valve needle. Furthermore conducts
connecting the supply duct with the outlet passage can easily
be made in the outlet passage, e. g. by simply drilling holes
in the outlet passage. This enables a cheap and reliable
manufacturing process of the metering device.
In a preferred embodiment of the invention the housing comprises
an inner tubular member containing the piezoelectric
actuator assembly and an outer tubular member surrounding the
inner tubular member and forming the outer jacket of the
housing, wherein the fluid supply duct is formed between the
inner tubular member and the outer tubular member.
Advantageously the annular fluid supply duct extends axially
from the fluid inlet of the injector through fluid admission
holes to the outlet passage.
In a further preferred embodiment of the invention,
the annular fluid supply duct extends axially over more than 20%, preferably over more than 30%, more preferably over more than 40% of the axial extension of the housing. This measure ensures a gasoline space of a large volume near the valve body.
the annular fluid supply duct extends axially over more than 20%, preferably over more than 30%, more preferably over more than 40% of the axial extension of the housing. This measure ensures a gasoline space of a large volume near the valve body.
In an advantageous embodiment of the invention, the fluid inlet
is formed by a fluid entry duct, arranged as a separate
element at the end part of the housing opposite to the end
part provided with the outlet passage.
Alternatively, the fluid inlet may be formed by a fluid entry
duct integral with the inner tubular member. Thereby the number
of parts is reduced and the assembly of the parts is simplified.
In a further preferred embodiment of the invention the housing
comprises an outer flange for installing the metering device
to a cylinder head of an internal combustion engine.
In any of the above mentioned designs, the metering device
according to the invention advantageously comprises
spring means for urging the valve needle in the closing position
and means for transmitting an axial extension of the
piezoelectric actuator assembly to the valve needle to displace
the needle from the closing position when activated.
The advantages gained by the technical features of the invention
include
- a reduction of internal pressure pulsations in the gasoline spaces of the injector,
- a reduction of the number of parts and an attendant simplification of assembly,
- a reduced risk of hydraulic losses, since no internal O-ring sealings are required,
- a simplified design and simplified machining of the fluid inlet fitting,
- different calibration methods such as via a screw on top of the housing are feasible,
- an improved deburring operation,
- the possibility of packaging reduction,
- a simplified package body design,
- the possibility of implementing a modular electrical connector to provide a power supple to the piezoelectric actuator, and
- the availability of a robust flange for the installation of the injector on the cylinder head.
The invention, both its construction an its method of operation
together with additional objects and advantages thereof,
will best be understood from the following description of
specific embodiments when read in connection with the accompanying
drawings, wherein
- Figure 1
- is a schematic axial cross section of an injector valve according to an embodiment of the invention;
- Figure 2
- is a schematic axial cross section of an injector valve according to another embodiment of the invention, in which the entry duct and the inner tubular member are a single part; and
- Figure 3
- is a schematic axial cross section of an injector valve with an outer flange according to a further embodiment of the invention.
Figure 1 shows an injection valve for direct-injection gasoline
engines, generally designated by 10. The injection valve
has a housing 12, which comprises an outer tubular member 121
and an inner tubular member 123.
The outer tubular member 121 forms the outer jacket of the
injection valve 10, and the inner tubular member 123 contains
the piezoelectric actuator assembly 30. The passage 14 formed
between the outer tubular member 121 and the inner tubular
member 123 provides a large annular pathway which transports
the gasoline supplied by the gasoline entry duct 16 to the
gasoline admission holes 28 and into the outlet passage 20
described below.
The valve body has an axial outlet passage 20 projecting
through the lower part of the housing 12 and terminating in a
metering opening 22. The metering opening 22 is surrounded by
a valve seat 26 which is opened or closed by the axial movement
of the valve needle 24 passing through the outlet passage
20.
The closed state of the injection valve 10, where the needle
24 is pressed against the valve seat 26 is provided by the
biased pressure of a helical spring 34 which rests on a snap
ring 32.
To open the injection valve to inject gasoline into the engine
cylinder, a piezoelectric actuator which forms part of
the piezoelectric actuator assembly 30 is activated. If an
excitation voltage is applied to the piezoelectric actuator,
it increases in length in axial direction by a predetermined
amount, typically about several tens of micrometers. This extension
in length is transmitted to the valve needle 24 which
depresses the biasing spring 34 and lifts from the valve seat
26. In this position, the injection of pressurized gasoline
in the cylinder starts.
When the excitation voltage is switched off, the length of
the piezoelectric actuator in axial direction decreases to
its normal value, whereby the biasing pressure of the helical
spring 34 forces the valve needle 24 back to its closing position
on the valve seat 26.
A thermal compensator 36 is provided to fix the position of
the piezoelectric actuator assembly 30 during fast changes of
its length, but compensates for slow changes in the position
of the piezoelectric actuator assembly 30 due to, for example,
thermal changes.
The passage 14 forms a large annular pathway for the gasoline.
Because of its large axial and annular extent, the passage
14 has a large volume compared to conventional gasoline
supply ducts. The large volume of passage 14 limits the value
of the peaks of pressure fluctuations arising from the opening
and closing of the metering opening 22. Thus, the provision
of the passage 14 leads to a stabilizing effect on the
gasoline pressure.
Figure 2 shows another embodiment of an injector 40 according
to the invention. Elements which are similar to elements of
Fig. 1 are designated by the same reference numerals and
their discussion is omitted. While the embodiment of Fig. 1
shows the gasoline entry duct 16 to be a separate element,
Fig. 2 shows an embodiment where the gasoline entry duct 161
is integral with the inner tubular member 123. As the inner
tubular member 123 and the gasoline entry duct 161 are formed
in one piece the number of mechanical parts is reduced. Also,
in this embodiment, the thermal compensator 36 is arranged in
the lower part of the housing 12, just above the snap ring
32.
A further improvement of the embodiment of Fig. 2 is shown in
Fig. 3. In addition to the integral gasoline entry duct 161,
the injector 50 has an outer flange 42 for fixing the injector
50 to a cylinder head of an internal combustion engine.
It has further a modular electrical connector 44 for providing
the power supply to the piezoelectric actuator assembly
30.
In all embodiments the risk of hydraulic losses is reduced by
replacing any O-rings with hermetic welds.
The features disclosed in the foregoing description, in the
drawings, and in the claims may alone as well as in any possible
combination be important for the realization of the invention.
Claims (8)
- A metering device for dosing pressurized fluids, particularly an injection valve for a fuel injection system in an internal combustion engine, comprisingan axially extending housing (12) having an end part provided with an outlet passage (20) terminating with a metering opening (22) and a fluid inlet (16; 161) for supplying the fluid under pressure, arranged at the end part of the housing (12) opposite to the end part provided with the outlet passage (20),an axially moveable valve needle (24) passing through the outlet passage (20) and controlling opening and closing of the metering opening (22) by its axial movement,a piezoelectric actuator assembly (30) in axial alignment with the valve needle (24) and cooperating with the valve needle (24) to control its axial movement, anda fluid supply duct (14) communicating with the fluid inlet (16; 161) and the outlet passage (20) for transmitting the pressurized fluid to be dosed to the outlet passage (20),
the fluid supply duct forms an axially extended annular supply duct (14) within the housing (12), that extends down to the outletpassage (20). - The metering device according to claim 1,
characterized in that
the housing (12) comprises an inner tubular member (123) containing the piezoelectric actuator assembly (30) and an outer tubular member (121) surrounding the inner tubular member (123) and forming the outer jacket of the housing (12), wherein the fluid supply duct (14) is formed between the inner tubular member (123) and the outer tubular member (121). - The metering device according to claim 1 or 2,
characterized in that
the annular fluid supply duct (14) extends axially from the fluid inlet (16; 161) of the injector through fluid admission holes (28) to the outlet passage (20). - The metering device according to any of the preceding claims,
characterized in that
the annular fluid supply duct (14) extends axially over more than 20%, preferably over more than 30%, more preferably over more than 40% of the axial extension of the housing (12). - The metering device according to any of the preceding claims,
characterized in that
the fluid inlet is formed by a fluid entry duct (16), arranged as a separate element at the end part of the housing (12) opposite to the end part provided with the outlet passage (20). - The metering device according to any of claims 1 to 4,
characterized in that
the fluid inlet (161) is formed by a fluid entry duct integral with the inner tubular member (123). - The metering device according to any of the preceding claims,
characterized in that
the housing (12) comprises an outer flange (42) for installing the metering device to a cylinder head of an internal combustion engine. - The metering device according to any of the preceding claims,
characterized in that
the metering device further includesspring means (34) for urging the valve needle (24) in the closing position andmeans for transmitting an axial extension of the piezoelectric actuator assembly (30) to the valve needle (24) to displace the needle (24) from the closing position when activated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02018663A EP1391607A1 (en) | 2002-08-20 | 2002-08-20 | Metering device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02018663A EP1391607A1 (en) | 2002-08-20 | 2002-08-20 | Metering device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1391607A1 true EP1391607A1 (en) | 2004-02-25 |
Family
ID=30775823
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02018663A Withdrawn EP1391607A1 (en) | 2002-08-20 | 2002-08-20 | Metering device |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1391607A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1724464A1 (en) * | 2005-05-09 | 2006-11-22 | Siemens Aktiengesellschaft | Injector and valve group for the injector |
EP1734253A1 (en) * | 2005-06-17 | 2006-12-20 | Siemens Aktiengesellschaft | Injection valve with housing and method for producing said housing |
WO2012048999A3 (en) * | 2010-10-14 | 2012-08-16 | Robert Bosch Gmbh | Fuel injection device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1046809A2 (en) | 1999-04-20 | 2000-10-25 | Siemens Aktiengesellschaft | Fluid metering device |
WO2001006115A1 (en) * | 1999-07-14 | 2001-01-25 | Robert Bosch Gmbh | Fuel injection valve |
US6302333B1 (en) * | 1998-04-18 | 2001-10-16 | Daimlerchrysler Ag | Injector for fuel injector systems |
-
2002
- 2002-08-20 EP EP02018663A patent/EP1391607A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6302333B1 (en) * | 1998-04-18 | 2001-10-16 | Daimlerchrysler Ag | Injector for fuel injector systems |
EP1046809A2 (en) | 1999-04-20 | 2000-10-25 | Siemens Aktiengesellschaft | Fluid metering device |
WO2001006115A1 (en) * | 1999-07-14 | 2001-01-25 | Robert Bosch Gmbh | Fuel injection valve |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1724464A1 (en) * | 2005-05-09 | 2006-11-22 | Siemens Aktiengesellschaft | Injector and valve group for the injector |
EP1734253A1 (en) * | 2005-06-17 | 2006-12-20 | Siemens Aktiengesellschaft | Injection valve with housing and method for producing said housing |
WO2012048999A3 (en) * | 2010-10-14 | 2012-08-16 | Robert Bosch Gmbh | Fuel injection device |
JP2013539838A (en) * | 2010-10-14 | 2013-10-28 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Fuel injection device |
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