CN201206488Y - Catalytic converter of three-stage purifying exhaust for automobile - Google Patents
Catalytic converter of three-stage purifying exhaust for automobile Download PDFInfo
- Publication number
- CN201206488Y CN201206488Y CNU2008200585091U CN200820058509U CN201206488Y CN 201206488 Y CN201206488 Y CN 201206488Y CN U2008200585091 U CNU2008200585091 U CN U2008200585091U CN 200820058509 U CN200820058509 U CN 200820058509U CN 201206488 Y CN201206488 Y CN 201206488Y
- Authority
- CN
- China
- Prior art keywords
- catalytic converter
- catalytic
- converter
- stage
- catalyst
- 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 - Fee Related
Links
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 48
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 238000000746 purification Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 13
- 239000000446 fuel Substances 0.000 abstract description 9
- 229910052763 palladium Inorganic materials 0.000 abstract description 7
- 229910052697 platinum Inorganic materials 0.000 abstract description 7
- 239000003054 catalyst Substances 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 229910052703 rhodium Inorganic materials 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract 3
- 238000010926 purge Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 238000006555 catalytic reaction Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model relates to an automobile exhaust gas catalytic converter mounted on an automobile exhaust pipe. The converter is composed of three single-stage catalytic converters, namely a primary catalytic converter, a secondary catalytic converter and a tertiary catalytic converter. Three single-stage catalytic converters are assembled into a whole by an air inlet pipe, a front cone body cavity, a metal tube shell, a lining pad, catalyst and a rear one body cavity; and the adjacent catalytic converters are connected through an exhaust connecting pipe. According to the purging demands when the air fuel ratio is larger, each catalytic converter adopts the catalyst with different components. According to the original discharge data of CO, HC and NOx in the engine, the blending ratio of the active components Pt, Pd and Rh of the catalyst built in the primary catalytic converter can be adjusted according to the demands; the blending ratio of active components in the secondary catalytic converter is focused on Rh; and the blending ratio of active components in the tertiary catalytic converter is focused on Pt and Pd. When the burning air fuel ratio of the engine is larger, the conversion rate of pollutants like CO and the HC exhausted by a motor vehicle can keep unchanged; and the conversion rate of Ox can be improved by 10 to 20 percent.
Description
Technical field
The utility model belongs to the auto parts machinery technical field, relates in particular to a kind of arrangement for catalytic purification of automobile exhaust contaminant.
Background technique
Along with increasing of automobile quantity causes aggravation to pollution of atmosphere, all states in the world have proposed more and more stricter emission request to automobile exhaust.
Purify and external purification in the general extension set of automobile exhaust gas purifying, emission controls by improving combustion mainly be by engine performance improvement and the measures such as quality that improve fuel oil reduce the pollution exhaust gas discharging.External purification then is by the catalyzed conversion apparatus being installed in automobile exhaust system, being made in the waste gas the very serious CO of pollution of atmosphere, harmful components such as HC, NOx are converted into harmless CO
2, H
2O, N
2Thereby, further reduce the pollution of Motor Vehicle to atmosphere.
In the Subaru Exhaust Emission Control of present stage, generally take single-stage or two-stage catalytic converter.The single-stage catalytic converter mainly applies to state I, the state II emission standard of thermal starting.And the two-stage catalytic converter mainly applies to state III, the state VI emission standard of cold start-up, its prime catalytic converter is near engine export, and the catalyzer that is loaded is less, the automobile exhaust of higher temperature is by this catalytic converter, except that harmful components such as portion C O, HC, NOx are able to effectively transform, and have heat to emit, and can further improve the temperature of exhaust, back level catalytic converter is improved the catalytic reaction of harmful components such as CO, HC, NOx.
The critical piece of catalytic converter is a catalyzer, and its main active component is precious metals such as Pt, Pd, Rh, the reaction of oxygen in the main catalysis CO of Pt and Pd, HC and the exhaust; The reaction of the main catalysis CO of Rh, HC and NOx.Because the rate constant of CO, HC and oxygen is greater than the rate constant of CO, HC and NOx, thus the air fuel ratio during engine combustion than greatly the time, catalytic converter is to the transformation efficiency of NOx ideal not really.
As seen, if can allow NOx and CO, HC reaction earlier, allow remaining CO, HC slowly and the oxygen reaction then, then the air fuel ratio when engine combustion is greatly the time, and CO, HC, NOx can both have very high conversion ratio.
Summary of the invention
The purpose of this utility model provides a kind of catalytic converter that improves automobile exhaust gas purifying efficient under the bigger situation of air fuel ratio.
The utility model is a kind of automotive exharst gas catalytic converter of three grades of purifications, this converter is made up of 3 single-stage catalytic converters, described single-stage catalytic converter is assembled into one by suction tude, front cone cavity, metal cylinder shell, liner, catalyzer and postcentrum cavity, connects by vent connection between the adjacent catalytic converter.
The needs that above-mentioned three grades of catalytic converters purify when big according to air fuel ratio, the catalyzer of employing different components at different levels.The 1st grade of catalytic converter, according to the original emissions data of motor CO, HC, NOx, the proportioning of its built-in catalyst activity component Pt, Pd, Rh can be regulated as required; The 2nd grade of catalytic converter, in the proportioning of active component based on Rh; The 3rd level catalytic converter, in the proportioning of active component based on Pt, Pd.
When the air fuel ratio when engine combustion is big, because NOx and CO, HC fully react earlier in the 2nd grade of catalytic converter; Yu Xia CO, HC further react with oxygen in the 3rd level catalytic converter more then, so CO, HC, NOx can both have very high conversion ratio.
The utility model apparatus structure is simple, does not need existing vent systems is made big change.This device not only can be applied to gasoline car, also can be used for diesel-oil vehicle and natural gas car etc.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1. the 1st grade of catalytic converter, 2. the 2nd grade of catalytic converter, 3. 3rd level catalytic converter, 4, vent connection.
Embodiment
As shown in Figure 1, a kind of automotive exharst gas catalytic converter of novel three grades of purifications, it comprises the catalytic converter of 3 single-stages, two adjacent single-stage catalytic converters are connected by vent connection 4.
Working principle: the waste gas that the motor car engine that air fuel ratio is bigger is discharged, enter the 1st grade of catalytic converter 1 through inlet pipe connection, except that harmful components such as portion C O, HC, NOx are able to effectively transform, and there is heat to emit, can further improve the temperature of exhaust.Exhaust the 2nd grade of catalytic converter 2 of flowing through then under the catalysis of Rh, allows NOx and CO, HC fully reaction earlier.The exhaust 3rd level catalytic converter 3 of flowing through again, under the catalysis of Pt, Pd, remaining CO, HC react with oxygen again.Through catalytic purification so step by step, CO, HC, NOx can both have very high conversion ratio.
I type test with GB 18352.3-2005 " light-duty vehicle pollutant emission limit and method of measurement (Chinese III, IV stage) " is an example, when the engine combustion air fuel ratio is big, after adopting catalytic converter of the present utility model, compare with original device, the conversion ratio of automobile exhausting pollutant CO, HC can remain unchanged, but the conversion ratio of NOx can improve 10-20%.
Claims (1)
1. the automotive exharst gas catalytic converter of three grades of purifications, it is characterized in that: this converter is made up of 3 single-stage catalytic converters, described single-stage catalytic converter is assembled into one by suction tude, front cone cavity, metal cylinder shell, liner, catalyzer and postcentrum cavity, connects by vent connection between the adjacent catalytic converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200585091U CN201206488Y (en) | 2008-05-16 | 2008-05-16 | Catalytic converter of three-stage purifying exhaust for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200585091U CN201206488Y (en) | 2008-05-16 | 2008-05-16 | Catalytic converter of three-stage purifying exhaust for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201206488Y true CN201206488Y (en) | 2009-03-11 |
Family
ID=40465554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200585091U Expired - Fee Related CN201206488Y (en) | 2008-05-16 | 2008-05-16 | Catalytic converter of three-stage purifying exhaust for automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201206488Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103782001A (en) * | 2011-09-05 | 2014-05-07 | 日野自动车株式会社 | Exhaust gas purification apparatus |
| CN106640280A (en) * | 2015-07-15 | 2017-05-10 | 王健 | Motor vehicle exhaust absorption device |
-
2008
- 2008-05-16 CN CNU2008200585091U patent/CN201206488Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103782001A (en) * | 2011-09-05 | 2014-05-07 | 日野自动车株式会社 | Exhaust gas purification apparatus |
| CN103782001B (en) * | 2011-09-05 | 2016-09-14 | 日野自动车株式会社 | Waste gas purification apparatus |
| CN106640280A (en) * | 2015-07-15 | 2017-05-10 | 王健 | Motor vehicle exhaust absorption device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20150914 Granted publication date: 20090311 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20160914 Granted publication date: 20090311 |
|
| PP01 | Preservation of patent right |
Effective date of registration: 20160914 Granted publication date: 20090311 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20170314 Granted publication date: 20090311 |
|
| PP01 | Preservation of patent right |
Effective date of registration: 20170314 Granted publication date: 20090311 |
|
| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20170914 Granted publication date: 20090311 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090311 Termination date: 20170516 |