CN106475739B - The nozzle member and its manufacturing method of fuel injector - Google Patents
The nozzle member and its manufacturing method of fuel injector Download PDFInfo
- Publication number
- CN106475739B CN106475739B CN201510532021.2A CN201510532021A CN106475739B CN 106475739 B CN106475739 B CN 106475739B CN 201510532021 A CN201510532021 A CN 201510532021A CN 106475739 B CN106475739 B CN 106475739B
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- China
- Prior art keywords
- nozzle member
- hole section
- guidance hole
- guidance
- fuel injector
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
This application discloses a kind of methods of nozzle member for manufacturing fuel injector, final structure is made it have including roughing nozzle member, the nozzle member of final structure has first end face and intermediate cascaded surface, the first end face of the nozzle member and intermediate cascaded surface are oppositely directed to, the nozzle member limits the inner hole for being suitable for accommodating the elongated needle valve member of the fuel injector, and the inner hole includes guidance hole section；In the case where applying impressed pressure in the first end face of the nozzle member and intermediate cascaded surface, the guidance hole section machined in above-mentioned steps is further finished, so that the scheduled first guidance hole section cross-sectional shape and the first guidance hole section radial dimension that there is the guidance hole section oil-fuel injector needle-valve for being suitable for be introduced into it to carry out expected sliding in it；After the completion of the finishing operations, the impressed pressure is removed.The application further relates to the nozzle member manufactured in this way and the fuel injector including said nozzle part.
Description
Technical field
This application involves a kind of methods of nozzle member for manufacturing fuel injector, according to the nozzle member that this method manufactures, and packet
Include the fuel injector of this nozzle member.
Background technique
High pressure fuel injector is generally made of the injector body and nozzle member that are secured together by fastening nut, needle-valve
It is placed in nozzle member.
Fig. 1 a-1b shows the schematic diagram in the pilot hole grinding stage of nozzle member 50 in the prior art, Fig. 1 c-1d and figure
1f-1g respectively illustrates the schematic diagram that nozzle member 50 is assembled to before and after injector body.
Nozzle member 50 includes the first end face 12 of telophragma being adapted to abut against after being fixed to fuel injector main body and suitable for supporting
The intermediate cascaded surface 14 of fastener respective surfaces is connect, and limits the inner hole 30 for being suitable for accommodating elongated needle valve member.Inner hole 30 wraps
The guidance hole section 32 for originating in first end face 12 is included, the second hole section 36 being connected to by high-pressure chamber 34 with guidance hole section 32.The
The internal diameter of two hole sections 36 be greater than guidance hole section 32 internal diameter, thus the second hole section 36 inner surface and elongated needle valve member it is corresponding
The gap of high-pressure oil flow warp is formed between outer surface.
The inner surface of guidance hole section 32 is usually formed by grinding, and Fig. 1 a and 1b are respectively illustrated in grinding
The longitudinal sectional view and top view of nozzle member 50 in the process.Grinding wheel 80 is shown in Fig. 1 a, is held to guidance hole section 32
Row grinding action.As shown in Figure 1 b, guidance hole section 32 is ground is processed as having circular cross-sectional shape.
Fig. 1 c and 1d respectively illustrate grinding action after the completion of, nozzle member 50 is assembled fixed to before injector body
Longitudinal sectional view and top view, the cross-sectional shape that can be seen that guidance hole section 32 from Fig. 1 d is still perfectly round.
Fig. 1 e shows nozzle member 50 according to prior art and is assembled to the outer of the fuel injector formed after injector body
View is seen, shows the fastener 60 of fixed nozzle part 50 and the injector body 70 of fuel injector in figure.Fig. 1 f and 1g difference
Show the longitudinal sectional view and top view of the nozzle member 50 after being fixed to injector body 70.
At this point, the nozzle member 50 being fixed to after injector body 70 is held between first end face 12 and intermediate cascaded surface 14
By the pressure F (Fig. 1 f) that other components (such as intermediate disk component and fastener) apply, guide around hole section 32 some or certain
The material deformation at a little positions causes the cross-sectional shape for guiding hole section 32 to become irregular shape.Fig. 1 g shows irregular shape
One illustrative example of the guidance hole section 32 of shape.At this moment, elongated needle valve member is inserted into inner hole 30, in the interior table of guidance hole section 32
Undesirable friction can occur between face and the outer surface of needle valve member.
Want to avoid the generation of above-mentioned phenomenon.
Summary of the invention
The purpose of the application is to overcome drawbacks described above by changing the manufacturing method of nozzle member, and nozzle member is avoided to be consolidated
Determine the inner surface of inner hole and the outer surface for the needle valve member being inserted into after injector body not being inconsistent, or even rubs.
Method according to the nozzle member of the manufacture fuel injector of the application includes:
Roughing nozzle member makes it have final structure, and the nozzle member of final structure, which has, is being fixed to institute by fastener
Towards the first end face of injector body and the intermediate cascaded surface contacted with the fastener when stating the injector body of fuel injector,
The first end face of the nozzle member and intermediate cascaded surface are oppositely directed to, and the nozzle member, which limits, is suitable for accommodating the fuel injector
The inner hole of elongated needle valve member, the inner hole include the guidance hole section between the first end face and intermediate cascaded surface；
In the case where applying impressed pressure relative to each other in the first end face of the nozzle member and intermediate cascaded surface, into
One step finishes the guidance hole section machined in above-mentioned steps, is suitable for be introduced into so that the guidance hole section has
Oil-fuel injector needle-valve in it carries out the scheduled first guidance hole section cross-sectional shape and the first guide hole of expected sliding in it
Section radial dimension；With
After the completion of the finishing operations, the impressed pressure is removed.
According to a possible embodiments, the impressed pressure and the case where nozzle member is fixed to the injector body
Equal, or both the difference of the operating pressure of lower receiving is in an allowed band.
According to a possible embodiments, the cross sectional dimensions of the guidance hole section generated in roughing step is set
It is described pre- to be less than the maximum radial dimension of the deformed nozzle member when the impressed pressure is applied on nozzle member
The first fixed guidance hole section radial dimension.
It is described after the further finishing operations are completed and remove impressed pressure according to a possible embodiments
Guidance hole section shows the second guidance hole section cross-sectional shape and the second guidance hole section radial dimension.
According to a possible embodiments, the second guidance hole section cross-sectional shape and the second guidance hole section radial dimension are not
It is same as the scheduled first guidance hole section cross-sectional shape and the first guidance hole section radial dimension.
According to a possible embodiments, second guidance hole section cross section has non-circular shape, first guidance
Hole section cross section has circular shape.
According to a possible embodiments, the further finishing operations are grinding actions.
According to a possible embodiments, the grinding action is carried out using grinding wheel.
According to a second aspect of the present application, a kind of nozzle member according to made of the above method is provided.
According to the third aspect of the application, a kind of fuel injector, including injector body are provided, is connected to by fastener
Elongated needle valve member in the injector body, as described above nozzle member, and the inner hole of the insertion nozzle member.
According to the nozzle member of the application, the finishing operations of the guidance hole section of the elongated needle valve member for guiding fuel injector are
It is carried out in the case where pre-applied external force, the guidance hole section of such nozzle member is by predeformation, it is ensured that nozzle member is being fixed to
When the external force that works is applied on nozzle member, nozzle member has scheduled guidance hole section cross-sectional shape after in injector body
With guidance hole section radial dimension.
Detailed description of the invention
The aforementioned and other feature of the application will be discussed in detail to obtain and become apparent from geography by what is provided with reference to the accompanying drawings
Solution, in the accompanying drawings:
Fig. 1 a-1g shows the nozzle member of the prior art, and wherein Fig. 1 a and 1b is the nozzle during grinding action
The longitudinal sectional view and top view of part, Fig. 1 c and 1d are the longitudinal sectional view and top view for completing the nozzle member of grinding action, figure
1e be include the prior art nozzle member fuel injector outside drawing, Fig. 1 f and 1g be assemble rear nozzle part longitudinal sectional view and
Top view；
Fig. 2 a-2f shows the nozzle member of one embodiment according to the application, and wherein Fig. 2 a and 2b is in finishing
The longitudinal sectional view and top view of nozzle member in operating process, Fig. 2 c and 2d are the longitudinal directions for completing the nozzle member of finishing operations
Cross-sectional view and top view, Fig. 2 e and 2f are after assembling according to the longitudinal sectional view and top view of the nozzle member of the application.
Specific embodiment
For help those skilled in the art definitely understand this application claims theme, with reference to the accompanying drawing in detail
The specific embodiment of the application is described.Through all attached drawings of the application, the same or similar component phase of structure or function
Same reference marker indicates.
It is suitable for any kind of high pressure fuel injector according to the nozzle member of the application.High pressure fuel injector, which generally comprises, to be passed through
The injector body and nozzle member that fastener is secured together.It is fixed to after injector body, nozzle member subjects oil spout
The pressure that other components of device apply.
According to the principle of the application, the inner hole of nozzle member is caused to become due to the appearance of above-mentioned operating pressure in order to prevent
Shape, so that occurring undesirable friction, the guide hole of the inner hole of nozzle member between elongated needle valve member and the inner hole of nozzle member
Then Duan Shouxian carries out finishing operations under conditions of pre-applied pressure by roughing.The cross of guidance hole section after roughing
Sectional dimension is set so that deformed when the impressed pressure for being substantially equal to operating pressure is applied on nozzle member
The maximum radial dimension of nozzle member is less than scheduled final radial dimension, and the scheduled final radial dimension is configured to be suitable for
It is inserted into the needle valve member in it and carries out expected sliding in it.In this way, the guidance hole section after roughing could be by subsequent
Finishing ensures to obtain the requirement such as the scheduled final radial dimension and surface roughness.Preferably, described deformed
The maximum radial dimension of nozzle member is obtained by experiment.Preferably, which is grinding action.Grinding tool is common
For grinding wheel.
In this way, processing guidance hole section under conditions of pre-applied pressure, is equivalent in the condition for applying predeformation
Under to guidance hole section inner surface finish.In this way, described pre- in the finishing operations and removal for completing guidance hole section
After applying pressure, guidance hole section will be deformed into nature, originally under natural conditions, guide the shape and size of hole section possible
Different from the shape and size before removal pre-applied pressure.After nozzle member is mounted in injector body, nozzle
Part is again by operating pressure, and the guidance hole section of nozzle member is by the trend deformation towards the predeformation.
Compared with not pre-applied pressure processes guidance hole section, nozzle member draws after being mounted in injector body
The shape and size of the inner surface of guide hole section are more controllable.If the pre-applied pressure is equal with operating pressure or their difference
If value is less than a certain specific tolerance limit, nozzle member guides hole section and is inserted into needle-valve after being mounted in injector body
Fitness between part can be also guaranteed in tolerance limit.
As a preferred example, the guidance hole section of the inner hole of nozzle member is in the pre-applied pressure equal with operating pressure
Under the conditions of be finish-machined to scheduled shape and size, that is, be refined to be suitable for needle valve member carry out expected sliding shape and
Size.
As an example, removal is applied to nozzle member after the completion of the process operation of the guidance hole section of the inner hole of nozzle member
On pre-applied pressure, the inner hole of nozzle member deforms, and deformed guidance hole section can have different from described scheduled
The formation and size of shape and size, such as it is deformed into irregular non-circular shape.
After nozzle member is assembled to injector body, the operating pressure equal with pre-applied pressure is applied in it
On, as during process operation, the inner hole of the nozzle member under the operating pressure conditions restores to being suitable for needle again
Valve member carries out the scheduled shape and size of expected sliding, in this way, reliably avoid the elongated needle valve member of fuel injector with
The generation to rub between the inner hole of nozzle member.Alternatively, ensuring nozzle if pre-applied pressure is not stringent equal with operating pressure
The shape and size of part guidance hole section of its inner hole under operating pressure are in allowed limits.
Below with reference to Fig. 2 a-2f detailed description according to the structure and its manufacturing method of the nozzle member of the fuel injector of the application.
Firstly, mechanical roughing nozzle member 50 makes it substantially and has final structure as shown in Figure 2 a.Final structure
Nozzle member 50 has first end face 12, intermediate cascaded surface 14 in the middle part of nozzle member 50, being oppositely directed to first end face 12,
And direction identical as intermediate cascaded surface 14, inclined end face 16 positioned at oil spout end, nozzle member 50 also define inner hole 30.It is interior
Hole 30 includes the second hole section 36 for guiding hole section 32 and being connected by high-pressure chamber 34 with guidance hole section 32.In this stage, slightly
The cross sectional dimensions of guidance hole section 32 after processing is set so that after deforming when impressed pressure is applied on nozzle member
The maximum radial dimension of nozzle member be less than scheduled final radial dimension, the scheduled final radial dimension is configured to suitable
Expected sliding is carried out in it in the needle valve member being inserted into it.In this way, after the guidance hole section 32 after roughing could pass through
Continuous finishing ensures to obtain the requirement such as the scheduled final radial dimension and surface roughness.Preferably, the deformation
The maximum radial dimension of nozzle member afterwards is obtained by experiment.
The step of carrying out finishing guidance hole section 32 later, Fig. 2 a and 2b are in finishing, are specially grinding action
The longitudinal sectional view and top view of nozzle member 50 in journey, it can be seen that operating pressure suffered after being assembled with nozzle member 50
Equivalent or external force F of the difference in a specific tolerance limit between the operating pressure is by pre-applied in the first end of nozzle member 50
On face 12 and intermediate cascaded surface 14, in this case, the guidance hole section 32 of nozzle member 50 is finished to scheduled shape and ruler
It is very little.According to a kind of specific embodiment, as shown, when external force F is equal with operating pressure, with grinding wheel 80 or it is in the art
The other grinding tools known by the guidance hole section 32 of nozzle member 50 be ground to by the outer surface phase for the elongated needle valve member being inserted into
The cross-sectional shape and radial dimension of symbol, as shown in Figure 2 b.According to a kind of feasible embodiment, the processing of other materials removal
Mode, such as laser machine, it can be used for finishing guidance hole section 32.
After the completion of finishing operations, external force F is removed.Fig. 2 c and 2d are to complete finishing operations and remove external force respectively
The longitudinal sectional view and top view of nozzle member 50 after F.Due to the removal of external force F, the guidance hole section 32 of nozzle member 50 becomes
Shape, and show the non-circular shape and cross sectional dimensions of the outer surface shown in Fig. 2 d, different from elongated needle valve member.
When assembly is according to the nozzle member 50 of the application, by means of fastener (fastener 60 in Fig. 1 e) by nozzle member 50
Injector body (injector body 70 in Fig. 1 e) fixed to fuel injector, the first end face 12 of nozzle member 50 are abutted to spray
Other component (not shown) of mouth, such as intermediate disk component；The intermediate cascaded surface 14 of nozzle member 50 is abutted to fastener 60
Respective surfaces.Operating pressure F is reapplied in the first end face 12 and intermediate cascaded surface 14 of nozzle member 50 as a result, such as
Shown in Fig. 2 e.
In the case that external force F in process is equal to operating pressure, the guidance hole section 32 of the inner hole 30 of nozzle member 50
It is substantially deformed into cross-sectional shape shown in Fig. 2 b and cross sectional dimensions again, that is, guidance hole section 32 is hoped to present
, the cross-sectional shape and cross sectional dimensions being consistent with the outer surfaces of elongated needle valve member.In this way, avoid be inserted into it is thin
Undesirable friction occurs between the inner surface of the guidance hole section 32 of the outer surface and nozzle member 50 of long needle valve member.In process
In external force F and the unequal situation of operating pressure under, degree that the guidance hole section 32 of the inner hole 30 of nozzle member 50 deforms again
Also it is able to ensure in allowed limits.
As above-mentioned, by under conditions of or difference operating pressure between equal with operating pressure is in tolerance limit
The guidance hole section of the inner hole of nozzle member is finished, such as grinding action, so that nozzle member is being mounted to fuel injector sheet
The guidance hole section of its inner hole, which can obtain, after body is suitable for scheduled cross-sectional shape and cross that needle valve member carries out expected sliding
Sectional dimension, or can ensure in the range of allowing.Cause this effectively avoids the application due to operating pressure
The cross-sectional deformation of nozzle member inner hole causes needle valve member with nozzle member inner hole in turn, and there is a phenomenon where rub.And in nozzle member
During the process operation of the guidance hole section in hole, the application of external force can be real by any proper method known in the art
It is existing.
Although describing the application based on specific embodiment, the application is not restricted to shown details.Phase
Instead, in the range of claim and its equivalent replacement, the various details of the application can be modified.
Claims (10)
1. a kind of method for the nozzle member (50) for manufacturing fuel injector, comprising:
Roughing nozzle member makes it have final structure, and the nozzle member of final structure, which has, is being fixed to institute by fastener (60)
State injector body (70) the Shi Chaoxiang injector body (70) of fuel injector first end face (12) and with the fastener (60)
The intermediate cascaded surface (14) of contact, the first end face (12) of the nozzle member and intermediate cascaded surface (14) are oppositely directed to, the spray
Mouth limits the inner hole (30) for being suitable for accommodating the elongated needle valve member of the fuel injector, and the inner hole (30) includes being located at described the
Guidance hole section (32) between one end face (12) and intermediate cascaded surface (14)；
Apply the feelings of impressed pressure relative to each other (F) in the first end face (12) of the nozzle member and intermediate cascaded surface (14)
Under condition, the guidance hole section (32) machined in above-mentioned steps is further finished, so that the guidance hole section (32) has
There is the scheduled first guidance hole section cross section for being suitable for carrying out the oil-fuel injector needle-valve being introduced into it in it expected sliding
Shape and the first guidance hole section radial dimension；With
After the completion of the finishing operations, the impressed pressure (F) is removed.
2. according to the method described in claim 1, wherein, the impressed pressure (F) be fixed in nozzle member (50) it is described
Equal, or both the difference of the operating pressure born in the case where injector body (70) is in an allowed band.
3. according to the method described in claim 2, wherein, being applied in time-varying on nozzle member (50) in the impressed pressure (F)
The maximum radial dimension of nozzle member (50) after shape is less than the scheduled first guidance hole section radial dimension.
4. according to the method described in claim 3, wherein, the further finishing operations are completed and remove impressed pressure
(F) after, the guidance hole section (32) shows the second guidance hole section cross-sectional shape and the second guidance hole section radial dimension.
5. according to the method described in claim 4, wherein, the second guidance hole section cross-sectional shape and second guides hole section diameter
It is different from the scheduled first guidance hole section cross-sectional shape and the first guidance hole section radial dimension to size.
6. according to the method described in claim 5, wherein, second guidance hole section cross section has non-circular shape, described
First guidance hole section cross section has circular shape.
7. method according to claim 1 to 6, wherein the further finishing operations are grinding actions.
8. according to the method described in claim 7, wherein, the grinding action is carried out using grinding wheel (80).
9. a kind of nozzle member of fuel injector (50), wherein the nozzle member any method system in -8 according to claim 1
At.
10. a kind of fuel injector, including injector body (70) are connected to the injector body (70) by fastener (60)
, elongated needle valve member in nozzle member (50) according to claim 9, and the inner hole of the insertion nozzle member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510532021.2A CN106475739B (en) | 2015-08-26 | 2015-08-26 | The nozzle member and its manufacturing method of fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510532021.2A CN106475739B (en) | 2015-08-26 | 2015-08-26 | The nozzle member and its manufacturing method of fuel injector |
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| Publication Number | Publication Date |
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| CN106475739A CN106475739A (en) | 2017-03-08 |
| CN106475739B true CN106475739B (en) | 2019-04-23 |
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| CN201510532021.2A Active CN106475739B (en) | 2015-08-26 | 2015-08-26 | The nozzle member and its manufacturing method of fuel injector |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106826138A (en) * | 2017-04-18 | 2017-06-13 | 上海第机床厂有限公司 | Presurized water reactor CRDM blind hole rod stroke housing and processing method |
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| CN103029037A (en) * | 2012-12-03 | 2013-04-10 | 大连理工大学 | Sealing ring machining pre-deformation force loading clamp and loading method |
| CN104084769A (en) * | 2014-06-30 | 2014-10-08 | 成都高普石油工程技术有限公司 | Nozzle machining technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6444259A (en) * | 1987-08-10 | 1989-02-16 | Tokai Trw & Co | Production of ball joint |
| DE4237405A1 (en) * | 1991-12-17 | 1993-06-24 | Mitsubishi Electric Corp | |
| US5947481A (en) * | 1996-08-02 | 1999-09-07 | Flowserve Management Company | Wavy face ring |
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| CN106475739A (en) | 2017-03-08 |
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Address after: 214028 No.17 Xinhua Road, national high tech Industrial Development Zone, Wuxi City, Jiangsu Province Patentee after: Bosch powertrain Co.,Ltd. Address before: 214028 No.17 Xinhua Road, national high tech Industrial Development Zone, Wuxi City, Jiangsu Province Patentee before: Bosch Automotive Diesel Systems Co.,Ltd. |
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