CN205941425U - Oxygen sensor dew point detection device - Google Patents
Oxygen sensor dew point detection device Download PDFInfo
- Publication number
- CN205941425U CN205941425U CN201620888862.7U CN201620888862U CN205941425U CN 205941425 U CN205941425 U CN 205941425U CN 201620888862 U CN201620888862 U CN 201620888862U CN 205941425 U CN205941425 U CN 205941425U
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- Prior art keywords
- oxygen sensor
- sensor
- temperature
- temperature sensor
- dew
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses an oxygen sensor dew point detection device, including installing on the blast pipe and responding to the end and stretch into the inside oxygen sensor of blast pipe closes on oxygen sensor it stretches into to install the response end on the blast pipe the inside temperature sensor of blast pipe, oxygen sensor is connected with the controller, temperature sensor's data output end with the controller is connected, according to temperature sensor's detection, after near the temperature of oxygen sensor exceedes certain numerical value, make oxygen sensor normally work again. The utility model discloses can accurately confirm whether to pass through the dew point fast and detect, whether oxygen sensor can normally work, does not receive engine configuration and operational environment's influence, can reduce natural gas engine and start the open loop control time between the normal work of late arrival oxygen sensor, improve natural gas engine's economic nature and emission nature.
Description
Technical field
This utility model is related to technical field of engines, more particularly, to a kind of oxygen sensor dew-point detecting device and method.
Background technology
Natural gas engine is usually used the oxygen content that oxygen sensor measures in tailpipe, thus carrying out closed loop control.
The core parts of oxygen sensor are the zirconia ceramicss pipe of porous.Oxygen sensor operationally needs to heat zirconia ceramicss pipe
To 750～780 DEG C about.Because containing substantial amounts of vapor in natural gas engine emission.When natural gas engine is firm
During startup, vapor in tail gas can condense into aqueous water because of the exhaustor under contact now low temperature state.If there are aqueous water
Splash on earthenware, will result in earthenware and burst, and then damage oxygen sensor.So when oxygen sensor exhaustor temperature nearby
Degree just can make oxygen sensor normal work after exceeding uniform temperature (it is generally acknowledged that this temperature is dew point temperature).Oxygen sensor can not
During normal work, electromotor can only operate under open loop situations, and the economy of electromotor, emission performance all can deteriorate.
It is protection oxygen sensor at this stage, typically postpone after the engine started to make oxygen more for a period of time using scaling method
Normal operation of sensor.Cause calibration process extremely complex very long because engine configuration, working environment are very various, and demarcate
Result is also inaccurate.
Natural gas engine is usually used the oxygen content that oxygen sensor measures in tailpipe, thus carrying out closed loop control.
In order to protect oxygen sensor, need to start again after confirming there is no aqueous water around oxygen sensor after natural gas engine starts
Work.Judge that the method whether oxygen sensor starts working is oxygen sensor and crosses dew point detection method, typically now using combustion
The method of gas energy integral determines from engine start to the time delay of oxygen sensor normal work.This method is passed through to calculate
Whether the heat estimation oxygen sensor sending that burns crosses dew point.Cause calibrated because engine configuration, working environment are very various
Journey is extremely complex very long, and calibration result is also inaccurate.
Utility model content
A technical problem to be solved in the utility model is to provide a kind of structure simple and detect accurate oxygen sensing
Device dew-point detecting device.
For solving above-mentioned technical problem, the technical solution of the utility model is：A kind of oxygen sensor dew-point detecting device, bag
Include and be arranged on exhaustor and induction end extend into oxygen sensor within described exhaustor, close on the described of described oxygen sensor
Induction end is provided with exhaustor and extend into temperature sensor within described exhaustor, described oxygen sensor is connected with control
Device, the data output end of described temperature sensor is connected with described controller.
As a kind of preferred technical scheme, described exhaustor is installed oxygen sensor seat, described oxygen sensor is installed
On described oxygen sensor seat.
As a kind of preferred technical scheme, described exhaustor is provided with block temperature sensor, described temperature sensor
On seat, temperature sensor is installed, described block temperature sensor is provided with the compression being fixed described temperature sensor and fills
Put.
As a kind of preferred technical scheme, described hold down gag include being sleeved in described temperature sensor and with described
The threaded T-shaped briquetting of block temperature sensor.
As a kind of preferred technical scheme, the length that described temperature sensor senses end extend in described exhaustor will
It extend into the length in described exhaustor less than described oxygen sensor induction end.
As a kind of preferred technical scheme, described controller includes single-chip microcomputer.
As a kind of preferred technical scheme, described controller includes engine start detector unit, temperature sensor event
Barrier detector unit, oxygen sensor cross dew point temperature calculating unit and oxygen sensor crosses dew point time calculating unit.
Due to employing technique scheme, a kind of oxygen sensor dew-point detecting device, including being arranged on exhaustor and
Induction end extend into the oxygen sensor within described exhaustor, closes on and is provided with sensing on the described exhaustor of described oxygen sensor
End extend into the temperature sensor within described exhaustor, and described oxygen sensor is connected with controller, described temperature sensor
Data output end is connected with described controller；According to the detection of temperature sensor, near oxygen sensor, temperature is more than a fixed number
After value, then make oxygen sensor normal work.This utility model can spend the dew point moment with accurate detection oxygen sensor, is not subject to electromotor
Configuration and the impact of working environment.
Brief description
The following drawings is only intended to, in this utility model is done with schematic illustration and explanation, not limit model of the present utility model
Enclose.Wherein：
Fig. 1 is the structural representation of this utility model embodiment；
In figure：1- exhaustor；21- oxygen sensor；22- oxygen sensor seat；31- temperature sensor；32- temperature sensor
Seat；33-T type briquetting.
Specific embodiment
With reference to the accompanying drawings and examples, this utility model is expanded on further.In the following detailed description, only pass through to say
Bright mode describes some one exemplary embodiment of the present utility model.Undoubtedly, those of ordinary skill in the art is permissible
Recognize, in the case of without departing from spirit and scope of the present utility model, can by with various different in the way of to described
Embodiment is modified.Therefore, accompanying drawing and description are inherently illustrative, rather than for limiting the protection of claim
Scope.
As shown in figure 1, a kind of oxygen sensor dew-point detecting device, including being arranged on exhaustor 1 and induction end extend into
Oxygen sensor 21 within described exhaustor 1, described exhaustor 1 is installed oxygen sensor seat 22, and described oxygen sensor 21 is pacified
It is contained on described oxygen sensor seat 22, the described exhaustor 1 closing on described oxygen sensor 21 is provided with induction end and extend into institute
State the temperature sensor 31 within exhaustor 1, described exhaustor 1 is provided with block temperature sensor 32, described temperature sensor
On seat 32, temperature sensor 31 is installed, described block temperature sensor 32 is provided with described temperature sensor 31 is fixed
Hold down gag, described hold down gag include being sleeved in described temperature sensor 31 and with described block temperature sensor 32 screw thread
The T-shaped briquetting 33 connecting, the length that described temperature sensor 31 induction end extend in described exhaustor 1 is less than described oxygen and passes
Sensor 21 induction end extend into the length in described exhaustor 1.Described oxygen sensor 21 is connected with controller (not shown),
Described controller includes single-chip microcomputer, and the data output end of described temperature sensor 31 is connected with described controller, described controller
Cross dew point temperature and calculate unit and oxygen including engine start detector unit, temperature sensor fault detector unit, oxygen sensor
Dew point time calculating unit crossed by sensor.
Oxygen sensor seat 22 and block temperature sensor 32 are separately mounted on exhaustor 1.Generally according to exhaustor 1
Middle tail gas direction, in upstream, oxygen sensor seat 22 in downstream, and block temperature sensor 32 need to pass block temperature sensor 32 apart from oxygen
Sensor seat 22 is as far as possible near.Oxygen sensor 21 leans on threaded being installed on oxygen sensor seat 22.Temperature sensor 31 relies on T-shaped pressure
Block 33 is installed on block temperature sensor 32, and temperature sensor 31 probe into exhaustor 1 depth will short as much as possible it is impossible to super
Cross oxygen sensor 21 and probe into depth.After natural gas engine starts, rich steam-laden tail gas flows through cryopumping pipe 1, and oxygen passes
Sensor 21, temperature sensor 31 nearby all can have the aqueous water of condensation, and this situation is more significantly in cold district.Temperature sensing
Temperature near device 31 real-time detection oxygen sensor 21, temperature typically occurs first rapid increase, then slowly rises, more quickly
The process rising, thus form two temperature flex points.Then it is assumed that passing through dew point temperature, oxygen after temperature is more than second flex point
Sensor 21 can start normal work.According to the detection of temperature sensor 31, when oxygen sensor 21, nearby temperature exceedes necessarily
After numerical value, then make oxygen sensor 21 normal work.This utility model can spend the dew point moment with accurate detection oxygen sensor 21, is not subject to
Engine configuration and the impact of working environment.
Operation principle of the present utility model：Controller includes engine start detector unit, temperature sensor fault detection
Unit, oxygen sensor cross dew point temperature calculating unit and oxygen sensor crosses dew point time calculating unit composition.Electromotor opens first
Dynamic detector unit real-time detection engine start state, enters temperature sensor fault detection single after engine start success
Unit, detection temperature sensor 31 whether there is short-circuit or breaking fault, if temperature sensor 31 does not have fault, enters
Oxygen sensor is crossed dew point temperature and is calculated unit；If temperature sensor 31 is faulty, enters oxygen sensor and cross dew point Time Calculation
Unit.Cross dew point temperature in oxygen sensor and calculate in unit, obtain near the oxygen sensor 21 that temperature sensor 31 gathers first
Temperature and ambient temperature.During due to ambient temperature difference, in exhaustor 1, the amount of condensed water is inconsistent, so needing basis
Ambient temperature demarcates different mistake dew point temperatures.When electromotor is again started up electromotor in the near future in parking, temperature sensor
Oxygen sensor 21 temperature that 31 record can be higher than ambient temperature, according to the difference mark of temperature and ambient temperature near oxygen sensor 21
Determine temperature correction coefficient.Then temperature correction coefficient is multiplied by dew point temperature and obtains revised oxygen sensor 21 dew point temperature excessively
Degree, whether last real-time detection Current Temperatures reached dew point temperature.Cross in dew point time calculating unit in oxygen sensor, first
Report and submit the DTC of temperature sensor 31, light corresponding malfunction indicator lamp.User's temperature sensor 31 is reminded to have occurred that
Fault, needs repairing.Then the time delay that oxygen sensor 21 crosses dew point is obtained according to ambient temperature.Last real-time detection starts
Whether the time spends the dew point time more than oxygen sensor 21.Current Temperatures reached dew point temperature or starting time is more than oxygen and senses
After the dew point time spent by device 21, enter oxygen sensor 21 working cell.Control the rapid heating ceramic pipe normal work of oxygen sensor 21.
This utility model can rapidly and accurately determine whether to detect by dew point, and whether oxygen sensor 21 can normal work
Make；The opened loop control time to oxygen sensor 21 normal work after natural gas engine starts can be reduced, improve natural
The economy of gas electromotor and emission performance.
Of the present utility model ultimate principle, principal character and of the present utility model advantage have been shown and described above.One's own profession
The technical staff of industry it should be appreciated that this utility model is not restricted to the described embodiments, described in above-described embodiment and description
Principle of the present utility model is simply described, on the premise of without departing from this utility model spirit and scope, this utility model is also
Have various changes and modifications, these changes and improvements both fall within the range of claimed this utility model.This utility model
Claimed scope is by appending claims and its equivalent thereof.
Claims (7)
1. a kind of oxygen sensor dew-point detecting device, including being arranged on exhaustor and induction end extend into inside described exhaustor
Oxygen sensor it is characterised in that：Close on and induction end is provided with the described exhaustor of described oxygen sensor extend into described row
The temperature sensor of pipe, described oxygen sensor is connected with controller, the data output end of described temperature sensor and institute
State controller to connect.
2. oxygen sensor dew-point detecting device as claimed in claim 1 it is characterised in that：Aerobic is installed on described exhaustor pass
Sensor seat, described oxygen sensor is arranged on described oxygen sensor seat.
3. oxygen sensor dew-point detecting device as claimed in claim 1 it is characterised in that：On described exhaustor, temperature is installed
Sensor holder, described block temperature sensor is provided with temperature sensor, described block temperature sensor is provided with by described temperature
The hold down gag that degree sensor is fixed.
4. oxygen sensor dew-point detecting device as claimed in claim 3 it is characterised in that：Described hold down gag includes being sleeved on
The T-shaped briquetting threadeded in described temperature sensor and with described block temperature sensor.
5. oxygen sensor dew-point detecting device as claimed in claim 1 it is characterised in that：Described temperature sensor senses end is stretched
The length entering in described exhaustor is less than described oxygen sensor induction end and extend into the length in described exhaustor.
6. oxygen sensor dew-point detecting device as claimed in claim 1 it is characterised in that：Described controller includes single-chip microcomputer.
7. oxygen sensor dew-point detecting device as claimed in claim 1 it is characterised in that：Described controller includes electromotor and opens
Dynamic detector unit, temperature sensor fault detector unit, oxygen sensor cross dew point temperature calculating unit and oxygen sensor crosses dew point
Time calculating unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620888862.7U CN205941425U (en) | 2016-08-15 | 2016-08-15 | Oxygen sensor dew point detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620888862.7U CN205941425U (en) | 2016-08-15 | 2016-08-15 | Oxygen sensor dew point detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205941425U true CN205941425U (en) | 2017-02-08 |
Family
ID=57918672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620888862.7U Withdrawn - After Issue CN205941425U (en) | 2016-08-15 | 2016-08-15 | Oxygen sensor dew point detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205941425U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198622A (en) * | 2016-08-15 | 2016-12-07 | 潍柴西港新能源动力有限公司 | A kind of oxygen sensor dew-point detecting device and detection method |
| CN111706424A (en) * | 2020-06-29 | 2020-09-25 | 东风商用车有限公司 | Method for diagnosing faults of post-processing structure and post-processing structure |
| CN115981394A (en) * | 2023-03-21 | 2023-04-18 | 中国第一汽车股份有限公司 | Oxygen sensor heating control method and control device |
-
2016
- 2016-08-15 CN CN201620888862.7U patent/CN205941425U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198622A (en) * | 2016-08-15 | 2016-12-07 | 潍柴西港新能源动力有限公司 | A kind of oxygen sensor dew-point detecting device and detection method |
| CN111706424A (en) * | 2020-06-29 | 2020-09-25 | 东风商用车有限公司 | Method for diagnosing faults of post-processing structure and post-processing structure |
| CN111706424B (en) * | 2020-06-29 | 2021-06-08 | 东风商用车有限公司 | Method for diagnosing faults of post-processing structure and post-processing structure |
| CN115981394A (en) * | 2023-03-21 | 2023-04-18 | 中国第一汽车股份有限公司 | Oxygen sensor heating control method and control device |
| CN115981394B (en) * | 2023-03-21 | 2023-06-09 | 中国第一汽车股份有限公司 | Oxygen sensor heating control method and control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170208 Effective date of abandoning: 20181113 |
|
| AV01 | Patent right actively abandoned |