CN105114200B - Device and method for connecting valve cover cap and oil injector - Google Patents
Device and method for connecting valve cover cap and oil injector Download PDFInfo
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- CN105114200B CN105114200B CN201510453764.0A CN201510453764A CN105114200B CN 105114200 B CN105114200 B CN 105114200B CN 201510453764 A CN201510453764 A CN 201510453764A CN 105114200 B CN105114200 B CN 105114200B
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- pressing plate
- fuel injector
- erecting bed
- valve cover
- mounting hole
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Abstract
The invention discloses a connecting device of a valve cover and an oil sprayer, which comprises a support ring, a pressing plate, a mounting hole, a thrust surface, a positioning boss, a mounting boss, a first pressing plate mounting step surface and a second pressing plate mounting step surface. The invention also discloses a method for connecting the valve cover cap and the oil injector, which comprises the following steps: 001. determining the diameter D0 of an oil seal on a valve cover according to the size of an electric connector and a high-pressure connector of an oil injector, and setting the diameter D1 of the outer edge of a cylindrical surface on a support ring to meet the requirements that D1 is larger than D0; 002. according to the diameter D of the matching part of the oil sprayer and the mounting hole, the inner hole diameter D2 of the mounting hole is determined, D2> D is met, and the gap between the oil sprayer and the mounting hole is guaranteed to be 0.05mm-2 mm. The connection method is effective and practical, the practicability is strong, the adopted connection device has simple structure, compact arrangement, convenient operation and good sealing performance.
Description
Technical field
The present invention relates to valve cover lid and fuel injector connection technique field, specially a kind of valve cover lid couples with fuel injector
Device and its coupling method.
Background technology
With the development of engine technology, the application of the technology such as Four valve, Dual Over Head Camshaft and electric controlled direct spray technology is got over
Come more extensive, injector body is complicated in addition, it is in irregular shape so that the arrangement of fuel injector becomes increasingly complex, right
In Four valve, the engine of Dual Over Head Camshaft, fuel injector, which is installed, is not present biasing tilt problem, be all it is vertical in be placed in cylinder
Center, its key arranged is to select rational fuel injector to install supporting way and bulge quantity, the arranged type of current fuel injector
Formula is divided into two kinds：Built-in and external.For built-in fuel injector, the oil inlet and oil return duct of fuel injector is arranged on valve cover lid
Interior, injector plate is arranged in valve cover outer side of lid, and the oil inlet and oil return hole of the fuel injector of this structure must be realized on cylinder cap,
Cylinder cap design can be more complicated.Now frequently with external fuel injector, i.e., the oil inlet and oil return mouthful of fuel injector is arranged on valve cover lid
Outside, injector plate can be according to arrangement space choice arrangement inside valve cover lid or outside, but Four valve position and Double Tops
Put spatial joint clearance between camshaft and oil injector body too small, valve cover lid can not be arranged with seal ring of fuel injector, cause external spray
Oily device can not be sealed directly with valve cover lid.
The content of the invention
The invention aims to overcome a kind of above-mentioned not enough valve cover lid of offer and fuel injector coupling arrangement and its connection
Connect method.
A kind of valve cover lid and fuel injector coupling arrangement, including support ring, pressing plate and bolt, the support ring are provided with
For providing the mounting hole of radial positioning to fuel injector and for the thrust surface to fuel injector offer axially position, the installation
The lower section in hole, which is provided with, to be used to realize on the inside of coupling arrangement and the circumferentially positioned positioning boss of fuel injector, the support ring provided with two
The individual installation base for installation bolt, the installation base is provided with the first pressing plate erecting bed terrace and the second pressing plate erecting bed
Terrace, the first pressing plate erecting bed terrace is located at the outside of installation base, and the second pressing plate erecting bed terrace, which is located at, to be installed
The inner side of boss, the height of the second pressing plate erecting bed terrace is less than the first pressing plate erecting bed terrace, the support ring appearance
Face is enclosed in seal groove, the seal groove circumferentially arranged with face of cylinder outer rim, the inwall of the mounting hole circumferentially arranged with one
Provided with sealing ring, one end of the pressing plate is located on the first pressing plate erecting bed terrace, and one end of the bolt passes through pressing plate and pacified
In installation base.The material of the sealing ring uses AEM rubber, and the compression ratio of the sealing ring is 10%-18%.
A kind of valve cover lid comprises the following steps with fuel injector coupling method：001st, according to the electric connection and height of fuel injector
Crimp head physical dimension determines that valve cover covers the diameter D0 of oil sealing, and the diameter D1 of face of cylinder outer rim is set in support ring, full
Sufficient D1>D0, it is ensured that coordinate with the oil sealing of valve cover lid, realize the sealing with valve cover lid；002nd, according to fuel injector and mounting hole
Diameter D at cooperation, determines the diameter of bore D2 of mounting hole, meets D2>D, it is ensured that the gap between fuel injector and mounting hole is
0.05mm-2mm, sealing ring is loaded in seal groove, installation base is set in support ring, first is set on installation base
Pressing plate erecting bed terrace and the second pressing plate erecting bed terrace, the height of the second pressing plate erecting bed terrace are less than the first pressing plate erecting bed
Terrace, after coupling arrangement is arranged on fuel injector using mounting hole as guiding, utilizes the adaptivity of sealing ring to realize connection dress
Put the radial positioning on fuel injector；003rd, due to valve cover cover oil sealing diameter D0 and fuel injector cooperation at diameter
D is not coaxial, there is eccentric distance e, sets positioning boss in support ring bottom, and the width of positioning boss and fuel injector cut flat face
With wide, when coupling arrangement is arranged on fuel injector, support ring is rotated, adjusts to positioning boss and fuel injector and cuts flat face
Together, the circumferentially positioned of coupling arrangement and fuel injector is realized；004th, the shaft shoulder of fuel injector is fitted with thrust surface, realizes coupling arrangement
Axially position on fuel injector；005th, one end of pressing plate is placed on the first pressing plate erecting bed terrace, passed through with bolt
In the middle of pressing plate and in installation base, the first pressing plate erecting bed terrace provides a supporting role for pressing plate, after bolt is fastened,
It is pressed on using the other end of lever principle pressing plate on fuel injector；006th, the fuel injector that will be equipped with coupling arrangement is assemblied in engine
On cylinder cap, load valve cover lid along the face of cylinder outer rim of coupling arrangement, be achieved that the sealed attachment of valve cover lid and fuel injector.
Coupling method of the present invention is effectively practical, and exploitativeness is strong, uses connecting device structure simple, characteristics of compact layout, behaviour
Facilitate, favorable sealing property.
Brief description of the drawings
Fig. 1 is mounting structure schematic diagram of the present invention；
Fig. 2 is valve cover lid and fuel injector connecting device structure schematic diagram；
Embodiment
Below in conjunction with the accompanying drawings and embodiment further illustrates the present invention.
Embodiment：A kind of valve cover lid of the present invention and fuel injector coupling arrangement, including support ring 1, pressing plate 3 and bolt 4,
The support ring 1, which is provided with, to be used to provide the mounting hole 5 of radial positioning and for providing axially fixed to fuel injector to fuel injector
The thrust surface 6 of position, the lower section of the mounting hole 5, which is provided with, to be used to realize coupling arrangement and the circumferentially positioned positioning boss 7 of fuel injector,
The inner side of support ring 1 is used for the installation base 9 of installation bolt provided with two, and the installation base 9 is pacified provided with the first pressing plate
The pressing plate erecting bed terrace 11 of step surface 10 and second is filled, the first pressing plate erecting bed terrace 10 is located at the outer of installation base 9
Side, the second pressing plate erecting bed terrace 11 is located at the inner side of installation base 9, the height of the second pressing plate erecting bed terrace 11
Less than the first pressing plate erecting bed terrace 10, the outer surface of support ring 1 is circumferentially arranged with face of cylinder outer rim 12, the mounting hole 5
Inwall circumferentially arranged with a circle seal groove 8, sealing ring 2 is provided with the seal groove 8, one end of the pressing plate 3 is located at
On first pressing plate erecting bed terrace 10, one end of the bolt 4 is through pressing plate 3 and in installation base 9.It is empty to save
Between, from minimum sealing ring sectional area under the premise of seal request is met, according to environment such as sealing medium, internal pressure and temperature
It is required that, the material of the sealing ring 2 can use AEM rubber, and the compression ratio of the sealing ring 2 is 10%-18%.
Valve cover lid comprises the following steps with fuel injector coupling method：
001st, determine that valve cover covers the diameter D0 of oil sealing according to the electric connection of fuel injector 13 and high pressure connection physical dimension,
The diameter D1 of face of cylinder outer rim 12 is set in support ring 1, D1 is met>D0, it is ensured that coordinate with the oil sealing of valve cover lid 14, realize
With the sealing of valve cover lid 14；
002nd, according to the diameter D at fuel injector 13 and the cooperation of mounting hole 5, the diameter of bore D2 of mounting hole 5 is determined, D2 is met
>D, it is ensured that the gap between fuel injector 13 and mounting hole 5 is 0.05mm-2mm, and sealing ring 2 is loaded in seal groove 8, in branch
Installation base 9 is set on pushing out ring 1, the first pressing plate erecting bed terrace 10 and the second pressing plate installation step are set on installation base 9
Face 11, the height of the second pressing plate erecting bed terrace 11 is less than the first pressing plate erecting bed terrace 10, by coupling arrangement with mounting hole 5
After being oriented on fuel injector 13, realize that coupling arrangement is arranged on fuel injector 13 using the adaptivity of sealing ring 2
Radial positioning；
003rd, due to valve cover, to cover the diameter D0 of oil sealing and diameter D at the cooperation of fuel injector 13 not coaxial, there is bias
Away from e, positioning boss 7 is set in the bottom of support ring 1, the width of positioning boss 7 cuts flat face with wide with fuel injector 13, will couple
When device is arranged on fuel injector 13, support ring 1 is rotated, adjusts flat in face of neat to positioning boss 7 and cutting for fuel injector 13, realizes
Coupling arrangement is circumferentially positioned with fuel injector 13；
004th, the shaft shoulder of fuel injector 13 is fitted with thrust surface 6, realizes the axial direction that coupling arrangement is arranged on fuel injector 13
Positioning；
005th, one end of pressing plate 3 is placed on the first pressing plate erecting bed terrace 10, with bolt 4 is through the centre of pressing plate 3 and pacifies
In installation base 9, the first pressing plate erecting bed terrace 10 is that pressing plate 3 is provided a supporting role, and after bolt 4 is fastened, utilizes thick stick
The other end of rod principle pressing plate 3 is pressed on fuel injector 13；
006th, the fuel injector 13 that will be equipped with coupling arrangement is assemblied in engine cylinder and covered, along outside the face of cylinder of coupling arrangement
Edge 12 loads valve cover lid 14, is achieved that the sealed attachment of valve cover lid 14 and fuel injector 13.
This coupling arrangement uses thin-walled design, occupies little space, and shape is according to the space between fuel injector 13 and camshaft
Gap set, by control shape and size precision by the clearance control of coupling arrangement and camshaft 2mm minimum clearance, entirely
Structure space-consuming is minimum, optimal with peripheral component gap.The coupling method is effectively practical, the connecting device structure letter used
It is single, lightweight, it is easy to operate, and sealed reliable.
High-temperature vibrating long duration test is verified
1. test objective：Evaluate under high-temperature vibrating environment, the reliability of coupling method, coupling arrangement and fuel injector 13
Sealing and the reliability of fastening, and coupling arrangement and valve cover lid 14 sealing.
2. experimental condition
Tested parts：4 sets of coupling arrangements, fuel injector 13 and valve cover lid 14
Experimental condition：Temperature：100℃
Testing equipment：Vibration rig
Acceleration（Above-below direction）Frequency number of times
5g 130Hz 10e7
15g 450Hz 10e7
2g 1490Hz 10e7
15g 2820Hz 10e7
3. assessment item
1) injecting kerosene into coupling arrangement after testing, standing 24h, observation kerosene whether seepage；
2) loose moment of the bolt 4 of measurement coupling arrangement.
By above-mentioned verification experimental verification, coupling arrangement and fuel injector 13 and the sealing of valve cover lid 14 are good, do not occur kerosene
Seepage is bad, and the loose moment of the bolt 4 of coupling arrangement is suitable with screw-down torque, and tightening state is good.
Claims (1)
1. a kind of valve cover lid and fuel injector coupling arrangement, including support ring (1), pressing plate (3) and bolt (4), the support
Ring (1), which is provided with, to be used to provide the mounting hole (5) of radial positioning and for providing axially position to fuel injector to fuel injector
Thrust surface (6), the lower section of the mounting hole (5), which is provided with, to be used to realize coupling arrangement and the circumferentially positioned positioning boss of fuel injector
(7), it is used for the installation base (9) of installation bolt provided with two on the inside of the support ring (1), the installation base (9) is provided with
First pressing plate erecting bed terrace (10) and the second pressing plate erecting bed terrace (11), the first pressing plate erecting bed terrace (10) are located at
The outside of installation base (9), the second pressing plate erecting bed terrace (11) is located at the inner side of installation base (9), second pressure
The height of plate erecting bed terrace (11) is less than the first pressing plate erecting bed terrace (10), and support ring (1) outer surface is circumferentially set
There is face of cylinder outer rim (12), the inwall of the mounting hole (5) is circumferentially arranged with a circle seal groove (8), the seal groove (8)
Interior to be provided with sealing ring (2), one end of the pressing plate (3) is located on the first pressing plate erecting bed terrace (10), and the one of the bolt (4)
End is through pressing plate (3) and in installation base (9)；The material of the sealing ring (2) uses AEM rubber；The sealing ring
(2) compression ratio is 10%-18%；It is characterized in that：Its coupling method comprises the following steps：
001st, determine that valve cover covers the diameter D0 of oil sealing according to the electric connection and high pressure connection physical dimension of fuel injector (13),
The diameter D1 of face of cylinder outer rim (12) is set in support ring (1), D1 is met>D0, ensures that the oil sealing with valve cover lid (14) is matched somebody with somebody
Close, realize the sealing with valve cover lid (14)；
002nd, according to the diameter D at fuel injector (13) and mounting hole (5) cooperation, the diameter of bore D2 of mounting hole (5) is determined, it is full
Sufficient D2>D, it is ensured that the gap between fuel injector (13) and mounting hole (5) is 0.05mm-2mm, and sealing ring (2) is loaded into sealing ring
In groove (8), in support ring（1）Upper setting installation base (9), sets the first pressing plate erecting bed terrace on installation base (9)
(10) with the second pressing plate erecting bed terrace (11), the height of the second pressing plate erecting bed terrace (11) is less than the first pressing plate erecting bed
Terrace (10), after coupling arrangement is arranged on fuel injector (13) with mounting hole (5) for guiding, utilizes the adaptive of sealing ring (2)
Answering property realizes the radial positioning that coupling arrangement is arranged on fuel injector (13)；
003rd, due to valve cover, to cover the diameter D0 of oil sealing and diameter D at fuel injector (13) cooperation not coaxial, there is eccentric throw
E, sets positioning boss (7) in support ring (1) bottom, and the width of positioning boss (7) and fuel injector (13) cut flat face with wide, will
When coupling arrangement is arranged on fuel injector (13), support ring (1) is rotated, cutting to positioning boss (7) and fuel injector (13) is adjusted
It is flat in face of neat, realize the circumferentially positioned of coupling arrangement and fuel injector (13)；
004th, the shaft shoulder of fuel injector (13) is fitted with thrust surface (6), realizes the axle that coupling arrangement is arranged on fuel injector (13)
To positioning；
005th, one end of pressing plate (3) is placed on the first pressing plate erecting bed terrace (10), it is middle through pressing plate (3) with bolt (4)
And in installation base (9), the first pressing plate erecting bed terrace (10) is that pressing plate (3) is provided a supporting role, and bolt (4) is tight
Gu after, it is pressed on using the other end of lever principle pressing plate (3) on fuel injector (13)；
006th, the fuel injector (13) that will be equipped with coupling arrangement is assemblied in engine cylinder and covered, along the face of cylinder outer rim of coupling arrangement
(12) load valve cover lid (14), be achieved that the sealed attachment of valve cover lid (14) and fuel injector (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510453764.0A CN105114200B (en) | 2015-07-29 | 2015-07-29 | Device and method for connecting valve cover cap and oil injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510453764.0A CN105114200B (en) | 2015-07-29 | 2015-07-29 | Device and method for connecting valve cover cap and oil injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105114200A CN105114200A (en) | 2015-12-02 |
| CN105114200B true CN105114200B (en) | 2017-10-10 |
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ID=54662279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510453764.0A Active CN105114200B (en) | 2015-07-29 | 2015-07-29 | Device and method for connecting valve cover cap and oil injector |
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| Country | Link |
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| CN (1) | CN105114200B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756803B (en) * | 2016-04-27 | 2018-07-31 | 江苏四达动力机械集团有限公司 | Fuel injector installs sealing device |
| CN109268183A (en) * | 2018-11-20 | 2019-01-25 | 宁波裕隆汽车制泵有限公司 | A kind of fuel injector installation latch closure and its processing method |
| CN112901389A (en) * | 2020-10-30 | 2021-06-04 | 重庆长安汽车股份有限公司 | Fuel injector support ring mounting structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546855A (en) * | 2003-12-12 | 2004-11-17 | 上海交通大学 | Sealing device for common rail Injector of diesel engine |
| JP2005233251A (en) * | 2004-02-18 | 2005-09-02 | Eagle Engineering Aerospace Co Ltd | Seal device |
| US7281521B2 (en) * | 2000-11-10 | 2007-10-16 | Siemens Aktiengesellschaft | Sealing element for placing between an injector casing and a cylinder head and an injector casing and a cylinder head provided with a sealing element of this type |
| CN201891520U (en) * | 2010-12-10 | 2011-07-06 | 中国重汽集团济南动力有限公司 | Fuel oil return structure for air cylinder cover |
-
2015
- 2015-07-29 CN CN201510453764.0A patent/CN105114200B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7281521B2 (en) * | 2000-11-10 | 2007-10-16 | Siemens Aktiengesellschaft | Sealing element for placing between an injector casing and a cylinder head and an injector casing and a cylinder head provided with a sealing element of this type |
| CN1546855A (en) * | 2003-12-12 | 2004-11-17 | 上海交通大学 | Sealing device for common rail Injector of diesel engine |
| JP2005233251A (en) * | 2004-02-18 | 2005-09-02 | Eagle Engineering Aerospace Co Ltd | Seal device |
| CN201891520U (en) * | 2010-12-10 | 2011-07-06 | 中国重汽集团济南动力有限公司 | Fuel oil return structure for air cylinder cover |
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| Publication number | Publication date |
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| CN105114200A (en) | 2015-12-02 |
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