CN203594522U - Oxygen sensor installation structure of motorcycle engine - Google Patents
Oxygen sensor installation structure of motorcycle engine Download PDFInfo
- Publication number
- CN203594522U CN203594522U CN201320804624.XU CN201320804624U CN203594522U CN 203594522 U CN203594522 U CN 203594522U CN 201320804624 U CN201320804624 U CN 201320804624U CN 203594522 U CN203594522 U CN 203594522U
- Authority
- CN
- China
- Prior art keywords
- lambda sensor
- exhaust passage
- motorcycle engine
- oxygen sensor
- air inlet
- 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.)
- Expired - Lifetime
Links
- 238000009434 installation Methods 0.000 title claims abstract description 35
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 title abstract description 16
- 239000001301 oxygen Substances 0.000 title abstract description 16
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical group [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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- Exhaust Silencers (AREA)
Abstract
The utility model discloses an oxygen sensor installation structure of a motorcycle engine. The oxygen sensor installation structure comprises a cylinder head, wherein an exhaust channel is formed in the cylinder head provided with an oxygen sensor, the oxygen sensor is arranged in a sensor installation hole formed in the cylinder head, the sensor installation hole is a counter bored hole which does not penetrate through the inner wall of the exhaust channel, the measuring head of the oxygen sensor is located in the sensor installation hole and is not exposed in the exhaust channel, the sensor installation hole is communicated with the exhaust channel through an exhaust branch pipeline, the exhaust branch pipeline comprises an air inlet hole and an air outlet hole, the air inlet hole is located in the upstream side of the exhaust channel, and the air outlet hole is located in the downstream side of the exhaust channel. Temperature of the installation portion of the oxygen sensor is effectively reduced, heat resistance of the oxygen sensor is enhanced, it is avoided that the work condition of the installation portion of the oxygen sensor is severe to cause damage, and service life of the oxygen sensor is prolonged. Meanwhile, space of the exhaust channel can not be occupied, performance of the engine is enhanced, and the oxygen sensor is arranged more flexibly.
Description
Technical field
The utility model relates to motorcycle engine, is the lambda sensor mounting structure of motorcycle engine specifically.
Background technique
Lambda sensor on motorcycle is used for measuring and feeding back the oxygen content in the exhaust after engine combustion, so that its burning reaches optimal air-fuel ratio, effectively reduces the composition of carbon monoxide in exhaust, hydrocarbon and oxynitrides.Lambda sensor is divided into hot type and non-hot type, and heating type oxygen sensors is because its price is high, complex structure, therefore generally adopt non-heating type oxygen sensors, but not heating type oxygen sensors is due to the requirement to engine exhaust temperature, must be arranged near near engine cylinder head relief opening.In conventional art, non-heating type oxygen sensors is generally arranged on the cylinder head of motor, the gauge head portion of sensor extend in the exhaust passage of cylinder head, utilize the high-temp waste gas in exhaust passage to carry out start detection chip, but, because delivery temperature is up to 800 ℃ of left and right, because gauge head portion being extend in exhaust passage, make the assembly department of sensor near exhaust passage, cause the temperature of installation of sensors portion also to approach this temperature, cause the operating mode of installation of sensors portion badly fragile; Secondly, the gauge head portion of sensor is extend in the exhaust passage of cylinder head, can hinder the smooth of exhaust stream in exhaust passage and flow, engine performance is had a negative impact; The 3rd, for improving the testing precision of sensor, as shown in Figure 1, sensor 1 ' must be arranged in the Vertical direction of exhaust passage, to increase the area of being bullied of transducer probe assembly portion, sensor be arranged vertically the more spaces such as the original radiating fin of cylinder head that taken, affected the heat radiation of motor.
Model utility content
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of lambda sensor mounting structure of motorcycle engine, can effectively reduce lambda sensor assembly department regional temperature, improves lambda sensor working life, is conducive to flowing smoothly of exhaust stream.
The utility model solves the technological scheme that its technical problem adopts:
A kind of lambda sensor mounting structure of motorcycle engine, comprise cylinder head, in cylinder head, be formed with exhaust passage, on described cylinder head, be provided with lambda sensor, lambda sensor is arranged in the installation of sensors hole forming on cylinder head, described installation of sensors hole is the counterbore that does not run through exhaust passage inwall, the gauge head portion of described lambda sensor is arranged in described installation of sensors hole and does not expose in described exhaust passage, installation of sensors hole is communicated with described exhaust passage by exhaust discrimination road, described exhaust discrimination road comprises the air inlet duct that is positioned at exhaust passage upstream side and the duct of giving vent to anger that is positioned at downstream side, exhaust passage.
As the improvement of technique scheme, the cross section in described air inlet duct is greater than the cross-section area of lambda sensor gauge head portion.
Preferably the cross section in described air inlet duct is 1.2 ~ 2 times of cross-section area of lambda sensor gauge head portion.
As the further improvement of technique scheme, described air inlet duct is with offside in the mode tilted configuration of upstream, exhaust passage the closer to exhaust passage.
Further, described in, give vent to anger duct with offside in the mode tilted configuration in downstream, exhaust passage the closer to exhaust passage.
Preferably exhaust passage relative to the duct of giving vent to anger, described air inlet duct tilts 30 ° ~ 60 °.
Further, between described air inlet duct and the wall of exhaust passage, cambered surface seamlessly transits.
Further, the relative exhaust passage of described lambda sensor tilts to install.
In the Vertical direction in duct of giving vent to anger described in preferred described lambda sensor is arranged in.
The beneficial effects of the utility model are: the utility model that adopts said structure, be set to not run through the counterbore of exhaust passage inwall by installation of sensors hole, the gauge head portion of lambda sensor is arranged in installation of sensors hole and does not expose in exhaust passage, and be communicated with installation of sensors hole and exhaust passage by exhaust discrimination road, tool has the following advantages: 1, make the assembly department of lambda sensor away from exhaust passage, effectively reduce the temperature of lambda sensor assembly department, improve the heat resistance of lambda sensor, avoid the operating mode that occurs lambda sensor assembly department badly to damage, extend the working life of lambda sensor, 2, avoid the gauge head portion of lambda sensor to stretch in exhaust passage, can not take space, exhaust passage, can not have a negative impact to exhaust, improved engine performance, 3, arranging of exhaust discrimination road changed the exhaust stream direction that flows to lambda sensor gauge head portion, makes the layout of lambda sensor more flexible, and lambda sensor is not limited to the Vertical direction of exhaust passage, the features such as the utility model also has simple and reasonable compactness, easy for installation, and implementation cost is low.
Accompanying drawing explanation
Fig. 1 is structural representation when lambda sensor and exhaust passage at right angle setting in conventional art;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is complete section schematic diagram of the present utility model;
Fig. 4 is the decomposing schematic representation of Fig. 3;
Fig. 5 is fundamental diagram of the present utility model;
Fig. 6 is the decomposing schematic representation of Fig. 5;
Fig. 7 is that lambda sensor is arranged in the structural representation in the Vertical direction in the duct of giving vent to anger.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
With reference to Fig. 2 ~ Fig. 4, the lambda sensor mounting structure of a kind of motorcycle engine of the present utility model, comprise cylinder head 1, in cylinder head 1, be formed with exhaust passage 2, on described cylinder head 1, be provided with lambda sensor 3, lambda sensor 3 is arranged in the installation of sensors hole 4 forming on cylinder head 1, between lambda sensor 3 and installation of sensors hole 4, being generally connected (assembly department that is lambda sensor) realization by known screw thread 33 installs fixing, described installation of sensors hole 4 is not for running through the counterbore of exhaust passage 2 inwalls, the gauge head portion 31 of described lambda sensor 3 is arranged in described installation of sensors hole 4 and does not expose in described exhaust passage 2, installation of sensors hole 4 is communicated with described exhaust passage 2 by exhaust discrimination road 5, the exhaust discrimination road that is wherein positioned at exhaust passage 2 upstream sides is air inlet duct 51, the exhaust discrimination road that is positioned at 2 downstream sides, exhaust passage is the duct 52 of giving vent to anger, in what is called, the side that the exhaust passage that downstream side refers to receives the waste gas of motor discharge is upstream side, the side that waste gas is discharged in atmosphere is downstream side.
The gauge head portion 31 of lambda sensor 3 comprises sensing chip; sensing chip is arranged in the element protection cap with multiple apertures 32; waste gas need be invaded and sensing contact chip inside from those apertures 32 to element protection cap; lambda sensor just can be activated and play the object of detection; in the present embodiment; the cross section in preferred described air inlet duct 51 is greater than the cross-section area of lambda sensor gauge head portion 31, and preferably the cross section in described air inlet duct 51 is 1.2 ~ 2 times of cross-section area of lambda sensor gauge head portion 31.This is conducive to the multiple apertures 32 on waste gas cladding element protective cap as much as possible, to increase the waste gas invading in element protection cap, improves the testing precision of lambda sensor 3; Air inlet duct 51 its cross sections can be non-circles, and when its cross section is that circle is air inlet duct 51 during for circular hole, the radial dimension in air inlet duct 51 is designed to 1.2 ~ 2 times of gauge head portion 31 radial dimensions of lambda sensor.
In the present embodiment, preferred described air inlet duct 51 is with offside in the mode tilted configuration of 2 upstreams, exhaust passage the closer to exhaust passage 2.Be conducive to like this waste gas and enter into smoothly in installation of sensors hole 4 and invade element protection cap inside, further improve the testing precision of lambda sensor 3.
In the present embodiment, the described duct 52 of giving vent to anger is with offside in the mode tilted configuration in 2 downstreams, exhaust passage the closer to exhaust passage 2, the waste gas that this structure is conducive in installation of sensors hole 4 is drained through the duct 52 of giving vent to anger as early as possible, avoid occurring that waste gas accumulates in installation of sensors hole 4, causing waste gas in exhaust passage 2 to be subject to accumulating the impact of waste gas and can not well to enter into installation of sensors hole 4 contacts with gauge head portion 31, improve the renewal frequency of installation of sensors hole 4 interior waste gas, improve testing precision.
Through overtesting, exhaust passage 2 relative to the duct 52 of giving vent to anger, above-mentioned air inlet duct 51 30 ° ~ 60 ° layouts that tilt, can obtain the effect of relative ideal, and wherein air inlet duct 51 is shown in Figure 2 with the tiltangleθ of exhaust passage 52.
In the present embodiment, between described air inlet duct 51 and the wall of exhaust passage 2, cambered surface seamlessly transits, and so can reduce waste gas and enter into from exhaust passage 2 resistance in air inlet duct 51.
As the present embodiment preferably, the installation of relative described lambda sensor 3 exhaust passage 2 can being tilted, as shown in Figure 5, in the Vertical direction in the duct 52 of giving vent to anger described in preferably described lambda sensor 3 being arranged in.This structure decrease lambda sensor 3 to the tying up of radiating fin space, be conducive to the heat radiation of motor.
The utlity model has following advantage: 1, make the assembly department (band of position is threaded) of lambda sensor 3 away from exhaust passage 2, effectively reduce the temperature of lambda sensor assembly department, improve the heat resistance of lambda sensor 3, avoid the operating mode that occurs lambda sensor assembly department badly to damage, extended the working life of lambda sensor; 2, avoid the gauge head portion 31 of lambda sensor 3 to stretch in exhaust passage 2, can not take 2 spaces, exhaust passage, can not have a negative impact to exhaust, improved engine performance; 3, specifically referring to shown in Fig. 3 ~ Fig. 4, exhaust discrimination road 5 the exhaust stream direction that has changed the gauge head portion 31 that flows to lambda sensor is set, wherein arrow A is the exhaust stream flow direction in exhaust passage 2, arrow B is that the exhaust stream that enters into air inlet duct 51 flows to, make the layout of lambda sensor 3 more flexible, lambda sensor 3 is not limited to the Vertical direction of exhaust passage 2, in the time that the relative exhaust passage 2 of lambda sensor 3 tilts to install, can reduce lambda sensor 3 to the tying up of radiating fin space, be conducive to the heat radiation of motor; The features such as the utility model also has simple and reasonable compactness, easy for installation, and implementation cost is low.
The above, be preferred embodiments of the present utility model, but the utility model is not limited to above-described embodiment, as long as it reaches technique effect of the present utility model with any same or similar means, within all should falling into protection domain of the present utility model.
Claims (9)
1. the lambda sensor mounting structure of a motorcycle engine, comprise cylinder head, in cylinder head, be formed with exhaust passage, on described cylinder head, be provided with lambda sensor, lambda sensor is arranged in the installation of sensors hole forming on cylinder head, it is characterized in that: described installation of sensors hole is the counterbore that does not run through exhaust passage inwall, the gauge head portion of described lambda sensor is arranged in described installation of sensors hole and does not expose in described exhaust passage, installation of sensors hole is communicated with described exhaust passage by exhaust discrimination road, described exhaust discrimination road comprises the air inlet duct that is positioned at exhaust passage upstream side and the duct of giving vent to anger that is positioned at downstream side, exhaust passage.
2. the lambda sensor mounting structure of a kind of motorcycle engine according to claim 1, is characterized in that: the cross section in described air inlet duct is greater than the cross-section area of lambda sensor gauge head portion.
3. the lambda sensor mounting structure of a kind of motorcycle engine according to claim 2, is characterized in that: the cross section in described air inlet duct is 1.2 ~ 2 times of cross-section area of lambda sensor gauge head portion.
4. according to the lambda sensor mounting structure of a kind of motorcycle engine described in claim 1 or 2 or 3, it is characterized in that: described air inlet duct is with offside in the mode tilted configuration of upstream, exhaust passage the closer to exhaust passage.
5. the lambda sensor mounting structure of a kind of motorcycle engine according to claim 4, is characterized in that: described in give vent to anger duct with offside in the mode tilted configuration in downstream, exhaust passage the closer to exhaust passage.
6. the lambda sensor mounting structure of a kind of motorcycle engine according to claim 5, is characterized in that: exhaust passage relative to the duct of giving vent to anger, described air inlet duct tilts 30 ° ~ 60 °.
7. the lambda sensor mounting structure of a kind of motorcycle engine according to claim 1, is characterized in that: between described air inlet duct and the wall of exhaust passage, cambered surface seamlessly transits.
8. the lambda sensor mounting structure of a kind of motorcycle engine according to claim 1, is characterized in that: the relative exhaust passage of described lambda sensor tilts to install.
9. the lambda sensor mounting structure of a kind of motorcycle engine according to claim 8, is characterized in that: in the Vertical direction in the duct of giving vent to anger described in described lambda sensor is arranged in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320804624.XU CN203594522U (en) | 2013-12-06 | 2013-12-06 | Oxygen sensor installation structure of motorcycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320804624.XU CN203594522U (en) | 2013-12-06 | 2013-12-06 | Oxygen sensor installation structure of motorcycle engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203594522U true CN203594522U (en) | 2014-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320804624.XU Expired - Lifetime CN203594522U (en) | 2013-12-06 | 2013-12-06 | Oxygen sensor installation structure of motorcycle engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203594522U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726945A (en) * | 2013-12-06 | 2014-04-16 | 江门市大长江集团有限公司 | Oxygen sensor installation structure of motorcycle engine |
-
2013
- 2013-12-06 CN CN201320804624.XU patent/CN203594522U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726945A (en) * | 2013-12-06 | 2014-04-16 | 江门市大长江集团有限公司 | Oxygen sensor installation structure of motorcycle engine |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140514 |
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| CX01 | Expiry of patent term |