EP1445477A1 - Metering device with flow calibrator and method for setting a flow rate of a metering device - Google Patents
Metering device with flow calibrator and method for setting a flow rate of a metering device Download PDFInfo
- Publication number
- EP1445477A1 EP1445477A1 EP03001633A EP03001633A EP1445477A1 EP 1445477 A1 EP1445477 A1 EP 1445477A1 EP 03001633 A EP03001633 A EP 03001633A EP 03001633 A EP03001633 A EP 03001633A EP 1445477 A1 EP1445477 A1 EP 1445477A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metering device
- adjustment element
- piezoelectric actuator
- valve needle
- flow rate
- 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
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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
- 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
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/161—Means for adjusting injection-valve lift
-
- 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 a housing having an end part provided with an outlet passage terminating with a metering opening, an axially moveable valve needle passing through the outlet passage and controlling opening and closing of the metering opening, and a piezoelectric actuator in axial alignment with the valve needle and cooperating with the valve needle to control its axial movement.
- the invention further relates to a method for setting a flow rate of such a metering device.
- EP 1 046 809 A2 discloses an injection valve of this type.
- the flow rate delivered by the injector can be set to a defined value at the end of the assembly process in the factory.
- the calibration of such an injector is carried out in a state where the injector is not completely assembled and welded.
- the injector to be calibrated is introduced in an appropriate blocking tool.
- the regulation of the flow rate through the injector is carried out by inserting one or more calibrated spacer rings in the valve spring blockage and repeatedly measuring the flow rate until a desired flow rate is reached.
- the injector proceeds to the final welding of the inlet fitting on the housing.
- the current process is also extremely complex, because several process variables such as the length and the elongation of the piezoelectric stack, the dimensional tolerances of the parts involved, and the chamber height of the thermal compensator have to be taken into account. Further, as the spacer rings have to be changed repeatedly, it is not possible to calibrate the injector during a flow phase of the fluid.
- a major drawback of the current solution arises from the inability to adjust the flow of the injector after the completion of the whole assembly process.
- the current type of flow adjustment is feasible only before the final welding of the housing and the valve body of the injector. Therefore, if it is found in the post calibration run that an injector does not meet the flow requirements, no further corrections are possible, and the injector has to be discarded.
- a plastically deformable adjustment element is arranged axially aligned between a bottom end piece of the piezoelectric actuator and a head of the valve needle, wherein a plastic deformation of the adjustment element regulates the axial spacing between the piezoelectric actuator and the valve needle, thereby setting a flow rate for the metering device.
- the invention is thus based on the idea to provide a deformable adjustment element in the metering device allowing for a flow rate calibration even after the metering device is completely assembled.
- the plastically deformable adjustment element comprises a metal element shaped such that a radial compression of the element causes an axial elongation thereof.
- the flow rate can then be set by driving two or more shaped punches radially inward through the housing of the metering device, thereby radially compressing and axially elongating the adjustment element.
- the relative movement of the upper and lower face of the metal element is based on a controlled deformation of the metal element, the desired lift of the needle and thus the desired flow rate can be achieved.
- the adjustment element has a first contact area for mounting the adjustment element to the bottom end piece of the piezoelectric actuator, a plastically deformable crimping area, the radial compression of which causes an axial elongation of the adjustment element, and a second contact area for contacting the head of the valve needle.
- the first contact area of the adjustment element and the bottom end piece of the piezoelectric actuator comprise corresponding engagement means to mount the adjustment element to the piezoelectric actuator.
- the second contact area of the adjustment element may advantageously comprise a hardened hemispherical head pin to provide good contact with the needle head.
- the adjustment element is formed as a hollow frustroconical and biconical body with a central cylindrical area.
- two or more through holes are provided in the housing of the metering device, which are radially aligned with a crimping area of the adjustment element.
- the through holes provide access to the adjustment element and allowing plastic deformation thereof after the complete assembly of the metering device.
- the flow rate through a completely assembled metering device is repeatedly measured and the adjustment element is gradually radially compressed until a predetermined flow rate through the metering device is achieved.
- one or more punches are inserted in the through holes of the housing and driven inwardly, thereby inducing an axial adjustment of the spacing between the piezoelectric actuator and the valve needle.
- the punch or the punches are driven inwardly by imposed strokes.
- the punch or the punches may be driven inwardly by an imposed load.
- FIG. 1 illustrates an injection valve 10 for direct-injection gasoline engines.
- the injection valve 10 has a housing 12, whose lower part has an outlet passage 14 terminating with a metering opening 16.
- the housing 12 contains a piezoelectric actuator 18.
- An excitation voltage is applied to the piezoelectric actuator 18 to open the injection valve 10 and inject gasoline into the engine cylinder.
- the piezoelectric actuator 18 increases in length in axial direction by a predetermined amount.
- the length extension is transmitted to a valve needle 20 disposed in the outlet passage 14.
- the needle 20 depresses a biasing spring and lifts from its seat to start the injection of pressurized gasoline in the engine cylinder.
- the length of the piezoelectric actuator 18 decreases to its normal value and the valve needle 20 is pushed back in its closing position.
- a plastically deformable adjustment element 22 is arranged axially aligned between a bottom action cap 24 of the piezoelectric actuator 18 and a head 26 of the valve needle 20.
- the adjustment element 22 is formed as a hollow frustroconical and biconical metal body 30 with a central cylindrical area 32.
- the metal body 30 has a shape for which a radial compression of the body 30 causes an axial elongation of the adjustment element 22.
- Fig. 3 shows an exploded view of the adjustment element 22 together with the piezoelectric actuator 18.
- the bottom end piece 24 of the piezoelectric actuator 18 comprises an engagement element 38, which allows the metal body 30 to be easily mounted to the piezoelectric actuator 18 by geometrical interference of the contact area 39 (Fig. 2) of the adjustment element 22 with the corresponding engagement element 38.
- the adjustment element 22 further comprises a hardened hemispherical head pin 34 to optimize the contact with the needle head 26.
- the hemispherical head pin 34 comprises an engagement element 36 allowing the metal body 30 to be easily mounted to the hemispherical head pin 34 by geometrical interference.
- two through holes 28 and 29 are provided in the housing 12 of the injection valve 10 to provide access to the adjustment element 22 and allowing plastic deformation thereof after the complete assembly of the injection valve 10.
- the two through holes 28 and 29 are radially aligned with the central crimping area 32 of the adjustment element and are spaced by 180° along the circumference of the housing 12. While only two through holes are shown in the embodiment of Fig. 1, it will be appreciated that three or more appropriately spaced through holes may be provided in the housing 12 as well.
- the flow rate of the injector valve 10 can then be adjusted after it is completely assembled and welded. In this state the through holes 28 and 29 are initially closed by plastic plugs for packaging purposes.
- the pre-adjusted lift and/or flow rate is measured. If the desired flow rate is not attained, the plastic plugs are removed and one or more punches are inserted in the through holes 28 and 29 and driven inwardly by applying strokes or a constant load. Thereby, the metal body 30 of the adjustment element 22 is gradually deformed.
- the resulting plastic deformation of the metal body caused by the action of the punches induces an axial elongation of the of adjustment element 22 and therefore increases the spacing between the piezoelectric actuator 18 and the needle 20.
- the relative movement of the upper and lower face of the metal body 30 is based on a controlled deformation, the desired lift and the desired flow rate can be achieved.
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
a housing (12) having an end part provided with an outlet
passage (14) terminating with a metering opening (16), an
axially moveable valve needle (20) passing through the outlet
passage (14), and controlling opening and closing of the metering
opening (16), and a piezoelectric actuator (18) in axial
alignment with the valve needle (20) and cooperating with
the valve needle (20) to control its axial movement. A plastically
deformable adjustment element (22) is arranged axially
aligned between a bottom end piece (24) of the piezoelectric
actuator (18) and a head (26) of the valve needle
(20), wherein a plastic deformation of the adjustment element
(22) regulates the axial spacing between the piezoelectric
actuator (18) and the valve needle (20), thereby setting a
flow rate for the metering device.
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 a housing having
an end part provided with an outlet passage terminating
with a metering opening, an axially moveable valve needle
passing through the outlet passage and controlling opening
and closing of the metering opening, and a piezoelectric actuator
in axial alignment with the valve needle and cooperating
with the valve needle to control its axial movement. The
invention further relates to a method for setting a flow rate
of such a metering device.
The European Patent application EP 1 046 809 A2 discloses an
injection valve of this type. For these injection valves it
is essential that the flow rate delivered by the injector
can be set to a defined value at the end of the assembly process
in the factory. Presently, the calibration of such an
injector is carried out in a state where the injector is not
completely assembled and welded.
The injector to be calibrated is introduced in an appropriate
blocking tool. The regulation of the flow rate through the
injector is carried out by inserting one or more calibrated
spacer rings in the valve spring blockage and repeatedly
measuring the flow rate until a desired flow rate is reached.
After the calibration process is completed, the injector proceeds
to the final welding of the inlet fitting on the housing.
Such an iterative operational sequence is time consuming
and expensive and may not be adapted to the mass production
in a factory.
The current process is also extremely complex, because several
process variables such as the length and the elongation
of the piezoelectric stack, the dimensional tolerances of the
parts involved, and the chamber height of the thermal compensator
have to be taken into account. Further, as the spacer
rings have to be changed repeatedly, it is not possible to
calibrate the injector during a flow phase of the fluid.
A major drawback of the current solution arises from the inability
to adjust the flow of the injector after the completion
of the whole assembly process. The current type of flow
adjustment is feasible only before the final welding of the
housing and the valve body of the injector. Therefore, if it
is found in the post calibration run that an injector does
not meet the flow requirements, no further corrections are
possible, and the injector has to be discarded.
In view of the foregoing, it is an object of the present invention
to improve the flow adjustment process for a metering
device of the above mentioned type.
This object is achieved by a metering device with the features
of appended claim 1, and by the method for setting a
flow rate of a metering device of independent claim 8.
Advantageous embodiments of the invention are disclosed in
the dependent claims.
According to the invention, in a metering device of the type
mentioned above, a plastically deformable adjustment element
is arranged axially aligned between a bottom end piece of the
piezoelectric actuator and a head of the valve needle,
wherein a plastic deformation of the adjustment element regulates
the axial spacing between the piezoelectric actuator
and the valve needle, thereby setting a flow rate for the metering
device.
The invention is thus based on the idea to provide a deformable
adjustment element in the metering device allowing for a
flow rate calibration even after the metering device is completely
assembled.
In a preferred embodiment of the invention, the plastically
deformable adjustment element comprises a metal element
shaped such that a radial compression of the element causes
an axial elongation thereof. The flow rate can then be set by
driving two or more shaped punches radially inward through
the housing of the metering device, thereby radially compressing
and axially elongating the adjustment element. As
the relative movement of the upper and lower face of the
metal element is based on a controlled deformation of the
metal element, the desired lift of the needle and thus the
desired flow rate can be achieved.
Advantageously, the adjustment element has a first contact
area for mounting the adjustment element to the bottom end
piece of the piezoelectric actuator, a plastically deformable
crimping area, the radial compression of which causes an axial
elongation of the adjustment element, and a second contact
area for contacting the head of the valve needle.
In a further preferred embodiment of the invention, the first
contact area of the adjustment element and the bottom end
piece of the piezoelectric actuator comprise corresponding
engagement means to mount the adjustment element to the piezoelectric
actuator.
The second contact area of the adjustment element may advantageously
comprise a hardened hemispherical head pin to provide
good contact with the needle head.
In an especially preferred embodiment, the adjustment element
is formed as a hollow frustroconical and biconical body with
a central cylindrical area.
Preferably, two or more through holes are provided in the
housing of the metering device, which are radially aligned
with a crimping area of the adjustment element. The through
holes provide access to the adjustment element and allowing
plastic deformation thereof after the complete assembly of
the metering device.
According to the invention, in a method for setting a flow
rate of any of the metering devices described above, the flow
rate through a completely assembled metering device is repeatedly
measured and the adjustment element is gradually radially
compressed until a predetermined flow rate through the
metering device is achieved.
In order to radially compress the adjustment element, preferably
one or more punches are inserted in the through holes
of the housing and driven inwardly, thereby inducing an axial
adjustment of the spacing between the piezoelectric actuator
and the valve needle.
In a preferred embodiment, the punch or the punches are
driven inwardly by imposed strokes. Alternatively, the punch
or the punches may be driven inwardly by an imposed load.
The advantages gained by the technical features of the invention
include
- an easy method for precisely setting the desired flow rate of an injector;
- the possibility to calibrate the flow rate after the completed assembly of the injector; and
- the possibility to adapt the method in a mass production process for metering devices.
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 a
specific embodiment when read in connection with the accompanying
drawings, wherein
- Figure 1
- is a schematic axial cross section of the lower part of an injector valve according to an embodiment of the invention;
- Figure 2
- is a close-up view of the adjustment element shown in Fig. 1; and
- Figure 3
- is an exploded view of the parts of the adjustment element together with the piezoelectric actuator of Fig. 1.
Figure 1 illustrates an injection valve 10 for direct-injection
gasoline engines. The injection valve 10 has a
housing 12, whose lower part has an outlet passage 14 terminating
with a metering opening 16.
Among other elements that are not pertinent to the present
invention, the housing 12 contains a piezoelectric actuator
18. An excitation voltage is applied to the piezoelectric actuator
18 to open the injection valve 10 and inject gasoline
into the engine cylinder. In response to the excitation voltage,
the piezoelectric actuator 18 increases in length in axial
direction by a predetermined amount. The length extension
is transmitted to a valve needle 20 disposed in the outlet
passage 14. The needle 20 depresses a biasing spring and
lifts from its seat to start the injection of pressurized
gasoline in the engine cylinder. When the excitation voltage
is terminated, the length of the piezoelectric actuator 18
decreases to its normal value and the valve needle 20 is
pushed back in its closing position.
In the embodiment of Fig. 1, a plastically deformable adjustment
element 22 is arranged axially aligned between a bottom
action cap 24 of the piezoelectric actuator 18 and a head 26
of the valve needle 20. As best seen in the close-up view of
Fig. 2, the adjustment element 22 is formed as a hollow frustroconical
and biconical metal body 30 with a central cylindrical
area 32. As evident from Fig. 2, the metal body 30 has
a shape for which a radial compression of the body 30 causes
an axial elongation of the adjustment element 22.
Fig. 3 shows an exploded view of the adjustment element 22
together with the piezoelectric actuator 18. The bottom end
piece 24 of the piezoelectric actuator 18 comprises an engagement
element 38, which allows the metal body 30 to be
easily mounted to the piezoelectric actuator 18 by geometrical
interference of the contact area 39 (Fig. 2) of the adjustment
element 22 with the corresponding engagement element
38.
The adjustment element 22 further comprises a hardened hemispherical
head pin 34 to optimize the contact with the needle
head 26. As the piezoelectric actuator 18, the hemispherical
head pin 34 comprises an engagement element 36 allowing the
metal body 30 to be easily mounted to the hemispherical head
pin 34 by geometrical interference.
Now again with reference to Fig. 1, two through holes 28 and
29 are provided in the housing 12 of the injection valve 10
to provide access to the adjustment element 22 and allowing
plastic deformation thereof after the complete assembly of
the injection valve 10. The two through holes 28 and 29 are
radially aligned with the central crimping area 32 of the adjustment
element and are spaced by 180° along the circumference
of the housing 12. While only two through holes are
shown in the embodiment of Fig. 1, it will be appreciated
that three or more appropriately spaced through holes may be
provided in the housing 12 as well.
The flow rate of the injector valve 10 can then be adjusted
after it is completely assembled and welded. In this state
the through holes 28 and 29 are initially closed by plastic
plugs for packaging purposes.
At first, the pre-adjusted lift and/or flow rate is measured.
If the desired flow rate is not attained, the plastic plugs
are removed and one or more punches are inserted in the
through holes 28 and 29 and driven inwardly by applying
strokes or a constant load. Thereby, the metal body 30 of the
adjustment element 22 is gradually deformed.
The resulting plastic deformation of the metal body caused by
the action of the punches induces an axial elongation of the
of adjustment element 22 and therefore increases the spacing
between the piezoelectric actuator 18 and the needle 20. As
the relative movement of the upper and lower face of the
metal body 30 is based on a controlled deformation, the desired
lift and the desired flow rate can be achieved.
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 (11)
- A metering device for dosing pressurized fluids, particularly an injection valve for a fuel injection system in an internal combustion engine, comprisingcharacterized in thata housing (12) having an end part provided with an outlet passage (14) terminating with a metering opening (16),an axially moveable valve needle (20) passing through the outlet passage (14), and controlling opening and closing of the metering opening (16), anda piezoelectric actuator (18) in axial alignment with the valve needle (20) and cooperating with the valve needle (20) to control its axial movement,
a plastically deformable adjustment element (22) is arranged axially aligned between a bottom end piece (24) of the piezoelectric actuator (18) and a head (26) of the valve needle (20), wherein a plastic deformation of the adjustment element (22) regulates the axial spacing between the piezoelectric actuator (18) and the valve needle (20), thereby setting a flow rate for the metering device. - ' The metering device according to claim 1,
characterized in that
the plastically deformable adjustment element (22) comprises a metal element (30, 32) shaped such that a radial compression of the element causes an axial elongation thereof. - The metering device according to claim 1 or 2,
characterized in that
the adjustment element (22) has a first contact area for mounting the adjustment element to (22) the bottom end piece (24) of the piezoelectric actuator (18), a plastically deformable crimping area (30, 32), the radial compression of which causes an axial elongation of the adjustment element (22), and a second contact area (34) for contacting the head (26) of the valve needle (20). - The metering device according to claim 3,
characterized in that
the first contact area of the adjustment element (22) and the bottom end piece (24) of the piezoelectric actuator (18) comprise corresponding engagement means (38, 39) to mount the adjustment element (22) to the piezoelectric actuator (18). - The metering device according to claim 3,
characterized in that
the second contact area of the adjustment element (22) comprises a hardened hemispherical head pin (34) to provide good contact with the needle head (26). - The metering device according to any of the preceding claims,
characterized in that
the adjustment element (22) is formed as a hollow frustroconical and biconical body (30) with a central cylindrical area (32). - The metering device according to any of the preceding claims,
characterized in that
two or more through holes (28, 29) are provided in the housing (12) of the metering device (10), radially aligned with a crimping area (30, 32) of the adjustment element (22), the through holes (28, 29) providing access to the adjustment element (22) and allowing plastic deformation thereof after the complete assembly of the metering device. - A method for setting a flow rate of a metering device according to any of the preceding claims, wherein
the flow rate through a completely assembled metering device is repeatedly measured and the adjustment element is gradually radially compressed until a predetermined flow rate through the metering device is achieved. - The method according to claim 7 and 8,
characterized in that
in order to radially compress the adjustment element, one or more punches are inserted in the through holes of the housing and driven inwardly, thereby inducing an axial adjustment of the spacing between the piezoelectric actuator and the valve needle. - The method according to claim 9,
characterized in that
the punch or the punches are driven inwardly by imposed strokes. - The method according to claim 9,
characterized in that
the punch or the punches are driven inwardly by an imposed load.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20030001633 EP1445477B1 (en) | 2003-01-24 | 2003-01-24 | Metering device with flow calibrator and method for setting a flow rate of a metering device |
| DE2003604442 DE60304442T2 (en) | 2003-01-24 | 2003-01-24 | Measuring device with flow calibration device and method for adjusting the flow rate of the measuring device |
| JP2003301930A JP2004225687A (en) | 2003-01-24 | 2003-08-26 | Metering device having flow calibrator and method for setting flow of metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20030001633 EP1445477B1 (en) | 2003-01-24 | 2003-01-24 | Metering device with flow calibrator and method for setting a flow rate of a metering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1445477A1 true EP1445477A1 (en) | 2004-08-11 |
| EP1445477B1 EP1445477B1 (en) | 2006-04-05 |
Family
ID=32605241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20030001633 Expired - Lifetime EP1445477B1 (en) | 2003-01-24 | 2003-01-24 | Metering device with flow calibrator and method for setting a flow rate of a metering device |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1445477B1 (en) |
| JP (1) | JP2004225687A (en) |
| DE (1) | DE60304442T2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1865194A1 (en) * | 2006-06-06 | 2007-12-12 | Siemens Aktiengesellschaft | Method for adjusting an injection valve |
| WO2012095384A1 (en) * | 2011-01-13 | 2012-07-19 | Continental Automotive Gmbh | Fuel injector and method for producing a fuel injector |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010042476A1 (en) * | 2010-10-14 | 2012-04-19 | Robert Bosch Gmbh | Device for injecting fuel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3735288A1 (en) * | 1987-10-17 | 1989-04-27 | Pierburg Gmbh | ELECTROMAGNETIC INJECTION VALVE FOR INTERNAL COMBUSTION ENGINES |
| US5232167A (en) * | 1991-11-16 | 1993-08-03 | Robert Bosch Gmbh | Electromagnetically actuatable injection valve |
| DE19932762A1 (en) * | 1999-07-14 | 2001-01-18 | Bosch Gmbh Robert | Procedure for adjusting the valve lift of an injection valve |
| EP1106817A2 (en) * | 1999-12-06 | 2001-06-13 | Siemens Aktiengesellschaft | Valve with improved abutment geometry |
| WO2001090570A1 (en) * | 2000-05-23 | 2001-11-29 | Caterpillar Inc. | Variable check stop for micrometering in a fuel injector |
| US6385848B1 (en) * | 2000-06-29 | 2002-05-14 | Siemens Automotive Corporation | Method of setting armature/needle lift in a fuel injector |
-
2003
- 2003-01-24 DE DE2003604442 patent/DE60304442T2/en not_active Expired - Lifetime
- 2003-01-24 EP EP20030001633 patent/EP1445477B1/en not_active Expired - Lifetime
- 2003-08-26 JP JP2003301930A patent/JP2004225687A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3735288A1 (en) * | 1987-10-17 | 1989-04-27 | Pierburg Gmbh | ELECTROMAGNETIC INJECTION VALVE FOR INTERNAL COMBUSTION ENGINES |
| US5232167A (en) * | 1991-11-16 | 1993-08-03 | Robert Bosch Gmbh | Electromagnetically actuatable injection valve |
| DE19932762A1 (en) * | 1999-07-14 | 2001-01-18 | Bosch Gmbh Robert | Procedure for adjusting the valve lift of an injection valve |
| EP1106817A2 (en) * | 1999-12-06 | 2001-06-13 | Siemens Aktiengesellschaft | Valve with improved abutment geometry |
| WO2001090570A1 (en) * | 2000-05-23 | 2001-11-29 | Caterpillar Inc. | Variable check stop for micrometering in a fuel injector |
| US6385848B1 (en) * | 2000-06-29 | 2002-05-14 | Siemens Automotive Corporation | Method of setting armature/needle lift in a fuel injector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1865194A1 (en) * | 2006-06-06 | 2007-12-12 | Siemens Aktiengesellschaft | Method for adjusting an injection valve |
| WO2012095384A1 (en) * | 2011-01-13 | 2012-07-19 | Continental Automotive Gmbh | Fuel injector and method for producing a fuel injector |
Also Published As
| Publication number | Publication date |
|---|---|
| DE60304442D1 (en) | 2006-05-18 |
| EP1445477B1 (en) | 2006-04-05 |
| DE60304442T2 (en) | 2006-08-24 |
| JP2004225687A (en) | 2004-08-12 |
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