CN105424886B - Oxygen sensor for internal combustion engine - Google Patents
Oxygen sensor for internal combustion engine Download PDFInfo
- Publication number
- CN105424886B CN105424886B CN201510898335.4A CN201510898335A CN105424886B CN 105424886 B CN105424886 B CN 105424886B CN 201510898335 A CN201510898335 A CN 201510898335A CN 105424886 B CN105424886 B CN 105424886B
- Authority
- CN
- China
- Prior art keywords
- contact spring
- contact
- heating rod
- fixed structure
- chamber lining
- Prior art date
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 239000001301 oxygen Substances 0.000 title claims abstract description 22
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 22
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 239000000919 ceramic Substances 0.000 claims abstract description 35
- 238000005452 bending Methods 0.000 claims abstract description 28
- 238000010276 construction Methods 0.000 claims abstract description 11
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 230000004888 barrier function Effects 0.000 claims description 6
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
The present invention relates to oxygen sensor for internal combustion engine, two contact springs are symmetrically assembled in ceramic chamber lining, the both sides of ceramic chamber lining inwall symmetrically set upper fixed structure and lower fixed structure respectively, the cooperation side of contact spring and ceramic chamber lining is provided with upper fixed structure and lower elastic construction, the upper fixed structure of contact spring and the upper fixed structure of ceramic chamber lining are fitted to each other, and the lower elastic construction of contact spring and the lower fixed structure of ceramic chamber lining are fitted to each other；The upper end of the contact spring sidepiece relative with heating rod is provided with R shape bending parts, and heating rod is when being pressed into contact spring, two R shapes bending parts formation guide channel；The bending end of contact spring is provided with deformation position limiting structure, the contact forces of increase contact spring and heating rod.By the ingehious design to contact spring and ceramic chamber lining, realize and smoothly assembled between heating rod and contact spring, enough contact forces are provided after the completion of assembling, it is ensured that the reliable electric connection of heating rod and contact spring under high temperature and vibration condition.
Description
Technical field
The present invention relates to a kind of lambda sensor, more particularly to the internal combustion that a kind of heating rod is connected with contact spring reliable electric
Machine lambda sensor.
Background technology
Lambda sensor is the important component in engine management system, is installed on gas extraction system, for perceiving oxygen concentration,
Realize closed-loop control.The installation site of lambda sensor determines the vibration that lambda sensor born in lifetime and temperature stress all
Compare high.To finger-type lambda sensor, its heater is individual devices, it is necessary to heating rod is reliably connected with heating power supply, otherwise
It cannot power, heating rod can not just be heated to sensor.
In traditional oxygen sensor in use for car, contact spring contacts silk using metal, and contact silk diameter than larger,
Oxygen sensor in use for car also provides enough spaces and gives contact silk, so as to realize that reliable electric is connected using the program.So
And, for the lambda sensor of miniaturization, in particular for the lambda sensor of motorcycle, used without enough spaces traditional
Electrical connection schemes.The oxygen sensor in use for car for how providing a kind of miniaturization electrical connection schemes of high reliability is to need solution
Technical problem certainly.
The content of the invention
The purpose of the present invention be overcome the shortcomings of prior art exist there is provided a kind of heating rod and contact spring reliable electric
The oxygen sensor for internal combustion engine of connection, meets the requirement of assembling and provides enough contact forces, it is ensured that in high temperature and vibration condition
Under, electrical connection is reliable.
The purpose of the present invention is achieved through the following technical solutions：
Oxygen sensor for internal combustion engine, feature is：Including two contact springs, ceramic chamber lining and heating rod, two contact springs pair
Title is assembled in ceramic chamber lining, and heating rod is pressed between two contact springs, and the both sides of the ceramic chamber lining inwall are symmetrically divided
Fixed structure and lower fixed structure She Zhi not be gone up, accordingly, the cooperation side of contact spring and ceramic chamber lining is provided with upper solid
Determine structure and lower elastic construction, the upper fixed structure of contact spring and the upper fixed structure of ceramic chamber lining are fitted to each other, contact bullet
The lower elastic construction of spring and the lower fixed structure of ceramic chamber lining are fitted to each other；The upper end of the contact spring sidepiece relative with heating rod
Provided with R shape bending parts, the bending end of the contact spring sidepiece relative with heating rod is provided with deformation position limiting structure, contact spring
Bottom be convexly equipped with barrier structure, during heating rod press-in contact spring, the R shapes bending part formation of two contact springs is oriented to logical
Road, during contact spring compressive deformation, deformation position limiting structure can be slided first, spacing when it is moved to barrier structure.
Further, above-mentioned oxygen sensor for internal combustion engine, wherein, the position that the contact spring is contacted with heating rod is set
There is salient point.
Further, above-mentioned oxygen sensor for internal combustion engine, wherein, lower elastic construction and the ceramics of the contact spring
The lower fixed structure of bushing is fitted to each other to form back-off structure.
Further, above-mentioned oxygen sensor for internal combustion engine, wherein, the circular arc of the R shape bending parts of the contact spring
Radius is that the angle between r, the medial surface of contact spring two of R shapes bending part is Φ, is mutually connected with R shapes bending part arc section
Changeover portion axial height be h, then：h>0.5r, -15 °≤Φ≤8 °.
Yet further, above-mentioned oxygen sensor for internal combustion engine, wherein, the R shape bending parts of the contact spring, preferred value
For h=r, 10 ° of Φ=﹣.
The substantive distinguishing features and significant progress that technical solution of the present invention is protruded are mainly reflected in：
1. contact spring is assembled to ceramic chamber lining, is fixed on by the upper fixed structure on contact spring and lower elastic construction
In ceramic chamber lining, it is difficult to take apart, it is ensured that in assembling process out of ceramic chamber lining will not deviate from；
Heating rod smoothly can be imported between two contact springs by 2. contact spring R shapes bending part design, convenient to install；
R shapes bending part design simultaneously can reduce the plastic deformation of big bending part to greatest extent there is provided enough elasticity, when heating rod is inserted
After entering, the movement of contact spring bending end is limited, and is improved elastic contact force, is met design requirement；
3. the insertion end of heating rod is provided with symmetric contact disk, the depth of press-in can be set by frock, it is ensured that connect
Tactile disk is in contact with contact spring；
4. by the ingehious design to contact spring in oxygen sensor for internal combustion engine and ceramic chamber lining, on the one hand it can realize
Smoothly assembled between heating rod and contact spring, on the other hand after the completion of assembling, enough contact forces can be provided, so as to protect
Demonstrate,prove the reliable electric connection of heating rod and contact spring under high temperature and vibration condition.
Brief description of the drawings
Fig. 1：Structural representation before the heating rod press-in of oxygen sensor for internal combustion engine；
Fig. 2：Structural representation after the heating rod press-in of oxygen sensor for internal combustion engine；
Fig. 3：The structural representation of ceramic chamber lining；
Fig. 4：The schematic front view of contact spring；
Fig. 5：The schematic side view of contact spring.
Embodiment
Technical solution of the present invention is described further below in conjunction with the accompanying drawings：
As shown in Fig. 1~5, oxygen sensor for internal combustion engine, including two contact springs 2, ceramic chamber lining 3 and heating rod 1, two connect
Touch spring 2 to be symmetrically assembled in ceramic chamber lining 3, heating rod 1 is pressed between two contact springs, the two of the inwall of ceramic chamber lining 3
Side symmetrically sets upper fixed structure 301 and lower fixed structure 302, accordingly, contact spring 2 to match somebody with somebody with ceramic chamber lining 3 respectively
Close side and be provided with upper fixed structure 201 and lower elastic construction 202, upper fixed structure 201 and the ceramic chamber lining 3 of contact spring 2
Upper fixed structure 301 be fitted to each other, the lower elastic construction 202 of contact spring 2 is filled with the lower fixed structure 302 of ceramic chamber lining 3
With combining and forming back-off structure 205, back-off structure 205 has the characteristics of easily assembling is not easily-disassembled.
The upper end of the sidepiece relative with heating rod 1 of contact spring 2 is provided with R shapes bending part 203, contact spring 2 and heating rod 1
The bending end of relative sidepiece is provided with deformation position limiting structure 204, and the bottom of contact spring 2 is convexly equipped with barrier structure 207, plus
When hot pin 1 is pressed into contact spring, on the one hand the formation guide channel of R shapes bending part 203 of two contact springs facilitates heating rod 1
Press-in, on the other hand contact spring 2 will not be damaged by pressure；During 2 compressive deformation of contact spring, deformation position limiting structure 204 can be slided first
It is dynamic, it is limited when it is moved to barrier structure 207, so as to increase the contact force between contact spring 2 and heating rod 1.Contact
The position that spring 2 is contacted with heating rod 1 is provided with salient point 206.
Contact spring 2 is assembled in ceramic chamber lining 3 from top, and the lower elastic construction 202 of contact spring is deformed, can be smooth
Load；After assembling in place, lower elastic construction 202 recovers deformation, and is formed to fall together with the lower fixed structure 302 of ceramic chamber lining
Buckle structure 205, such contact spring 2 cannot be split out out of ceramic chamber lining 3 easily, so as to ensure to contact bullet in assembling process
The position of spring is fixed.Heating rod 1 smoothly can be imported between two contact springs by the R shapes bending part design of contact spring,
Convenient to install, while the design of R shapes bending part can reduce the plastic deformation of big bending part to greatest extent, there is provided enough bullets
Property.As shown in figure 4, the design parameter of R shapes bending part 203 is：h>0.5r, -15 °≤Φ≤8 °.It is preferred that, h=r, 10 ° of Φ=﹣.
After heating rod 1 is inserted, the movement of the deformation position limiting structure 204 of contact spring bending end is blocked structure 207 and limited, so that
Elastic contact force F can be further improved, the requirement of design is met.The insertion end of heating rod is provided with symmetric contact disk, passes through
Frock can set the depth of press-in, so ensure that contact disc is in contact with contact spring, realize heating rod with contacting bullet
The reliable electric connection of spring.The contact area of contact spring is provided with salient point 206, further the reliability of increase contact.
By the ingehious design to contact spring in lambda sensor and ceramic chamber lining, heating rod on the one hand can be realized with connecing
Touch and smoothly assemble between spring, on the other hand after the completion of assembling, enough contact forces can be provided, thus ensure in high temperature and
The reliable electric connection of heating rod and contact spring under vibration condition.
It is emphasized that：It the above is only presently preferred embodiments of the present invention, not make any formal to the present invention
Limitation, any simple modification, equivalent variations and modification that every technical spirit according to the present invention is made to above example,
In the range of still falling within technical solution of the present invention.
Claims (5)
1. oxygen sensor for internal combustion engine, it is characterised in that：Including two contact springs (2), ceramic chamber lining (3) and heating rod (1), two
Contact spring (2) is symmetrically assembled in ceramic chamber lining (3), and heating rod (1) press-in is between two contact springs, the ceramic liner
The both sides for covering (3) inwall symmetrically set upper fixed structure (301) and lower fixed structure (302), accordingly, contact spring respectively
(2) the cooperation side with ceramic chamber lining (3) is provided with upper fixed structure (201) and lower elastic construction (202), contact spring (2)
The upper fixed structure (301) of upper fixed structure (201) and ceramic chamber lining (3) be fitted to each other, the lower elasticity knot of contact spring (2)
The lower fixed structure (302) of structure (202) and ceramic chamber lining (3) is fitted to each other；The contact spring (2) is relative with heating rod (1)
Sidepiece upper end be provided with R shapes bending part (203), contact spring (2) sidepiece relative with heating rod (1) bending end setting
There is deformation position limiting structure (204), the bottom of contact spring (2) is convexly equipped with barrier structure (207), heating rod (1) press-in contact bullet
During spring, R shapes bending part (203) the formation guide channel of two contact springs during contact spring (2) compressive deformation, is deformed spacing
Structure (204) can be slided first, spacing when it is moved to barrier structure (207).
2. oxygen sensor for internal combustion engine according to claim 1, it is characterised in that：The contact spring (2) and heating rod
(1) position of contact is provided with salient point (206).
3. oxygen sensor for internal combustion engine according to claim 1, it is characterised in that：The lower elasticity of the contact spring (2)
Structure (202) and the lower fixed structure (302) of ceramic chamber lining (3) are fitted to each other to form back-off structure (205).
4. oxygen sensor for internal combustion engine according to claim 1, it is characterised in that：The R shape bending parts of the contact spring
(203) arc radius is that the angle between r, the medial surface of contact spring (2) two of R shapes bending part is Φ, with R shape bending parts
The axial height for the changeover portion that circle of position segmental arc is mutually connected is h, then：h>0.5r, -15 °≤Φ≤8 °.
5. oxygen sensor for internal combustion engine according to claim 4, it is characterised in that：10 ° of the h=r, Φ=﹣.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510898335.4A CN105424886B (en) | 2015-12-09 | 2015-12-09 | Oxygen sensor for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510898335.4A CN105424886B (en) | 2015-12-09 | 2015-12-09 | Oxygen sensor for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105424886A CN105424886A (en) | 2016-03-23 |
| CN105424886B true CN105424886B (en) | 2017-10-13 |
Family
ID=55503228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510898335.4A Active CN105424886B (en) | 2015-12-09 | 2015-12-09 | Oxygen sensor for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105424886B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201207043Y (en) * | 2008-05-16 | 2009-03-11 | 联合汽车电子有限公司 | Gas sensor |
| CN102095767A (en) * | 2009-12-15 | 2011-06-15 | 上海航天汽车机电股份有限公司 | Electrode connecting device for oxygen sensor |
| CN202041500U (en) * | 2011-01-26 | 2011-11-16 | 北京埃尔贝勒汽车电子科技有限公司 | Oxygen sensor of motorcycle |
| CN204594968U (en) * | 2015-05-26 | 2015-08-26 | 苏州工业园区传世汽车电子有限公司 | Engine gas sensor |
| CN205246629U (en) * | 2015-12-09 | 2016-05-18 | 苏州工业园区传世汽车电子有限公司 | Oxygen sensor for internal combustion engine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19605290C2 (en) * | 1996-02-14 | 1998-02-26 | Bosch Gmbh Robert | Sensor |
| JP2004198360A (en) * | 2002-12-20 | 2004-07-15 | Denso Corp | Gas sensor |
-
2015
- 2015-12-09 CN CN201510898335.4A patent/CN105424886B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201207043Y (en) * | 2008-05-16 | 2009-03-11 | 联合汽车电子有限公司 | Gas sensor |
| CN102095767A (en) * | 2009-12-15 | 2011-06-15 | 上海航天汽车机电股份有限公司 | Electrode connecting device for oxygen sensor |
| CN202041500U (en) * | 2011-01-26 | 2011-11-16 | 北京埃尔贝勒汽车电子科技有限公司 | Oxygen sensor of motorcycle |
| CN204594968U (en) * | 2015-05-26 | 2015-08-26 | 苏州工业园区传世汽车电子有限公司 | Engine gas sensor |
| CN205246629U (en) * | 2015-12-09 | 2016-05-18 | 苏州工业园区传世汽车电子有限公司 | Oxygen sensor for internal combustion engine |
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| Publication number | Publication date |
|---|---|
| CN105424886A (en) | 2016-03-23 |
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