CN204163811U - A kind of varying vehicle exhaust emissions processing system - Google Patents
A kind of varying vehicle exhaust emissions processing system Download PDFInfo
- Publication number
- CN204163811U CN204163811U CN201420200480.1U CN201420200480U CN204163811U CN 204163811 U CN204163811 U CN 204163811U CN 201420200480 U CN201420200480 U CN 201420200480U CN 204163811 U CN204163811 U CN 204163811U
- Authority
- CN
- China
- Prior art keywords
- processing system
- catalytic converter
- exhaust emissions
- motor
- switching valve
- 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
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 provides a kind of varying vehicle exhaust emissions processing system, and described varying vehicle exhaust emissions processing system at least comprises structure: vehicle body; Outlet pipe, is connected with described vehicle body; Described outlet pipe is connected with oxidation catalytic converter and is connected to the selective catalytic reduction reaction unit in described oxidation catalytic converter downstream; Exhaust bypass pipe, between the outlet pipe being communicated in described oxidation catalytic converter two ends; Switching valve, is arranged on described exhaust bypass pipe; Described switching valve controls it by the control system of motor and opens or closes; Described vehicle body is diesel engine.By arranging exhaust bypass pipe and switching valve in discharge treating system, make motor under different rotating speeds, the path that tail gas passes through can be switched, both can ensure that diesel engine reaches the standard of discharge, the impact on engine power performance and Economy can be reduced again as far as possible.
Description
Technical field
The utility model relates to varying vehicle exhaust emissions processing system, particularly relates to a kind of variable exhaust emissions of diesel engine processing system.
Background technique
Along with social progress, the application scale of motor expands rapidly, and the pollutant of its discharge is recognized to the harm that environment and human body cause.In order to Environmental security, the space that the protection mankind depend on for existence, the emission control technique of motor is developed.Develop various exhaust gas post-treatment device at present, effectively to limit the exhaust emissions from explosive motor.To compression ignition engine, mainly take measures to reduce its NO under not affecting the prerequisite of engine power performance and Economy as far as possible
xwith the discharge of PM.
As shown in Figure 1, described system at least comprises the emission from vehicles system of prior art: vehicle body; Outlet pipe, is connected with described vehicle body; Described outlet pipe is connected with oxidation catalytic converter (DOC) and is connected to selective catalytic reduction reaction (SCR) unit in described oxidation catalytic converter downstream.
Oxidation catalytic converter (DOC) comprises precious metal usually, such as platinum and/or palladium, and catalyzer is wherein to be oxidized the carbon hydride that is present in exhaust stream and carbon monoxide becomes carbon dioxide and water.DOC can be used for converting the nitrous oxide discharged in engine air flow (NO) to nitrogen dioxide (NO2).
Selective catalytic reduction reaction unit usually for diesel engine, to reduce NO
xdischarge.In SCR, nitrogen oxide (NO
x) react with reducing agent, it is injected into by dosing system and needs to be adsorbed in the tail gas stream on SCR catalyst, and the dosage reagent (such as urea) of injection decomposes and forms ammonia (NH
3), NH
3reducing agent, its for NO
xreact, with by NO
xbe reduced into nitrogen (N
2) and water (H
2o).
But when the running of the large load of high engine speeds, because the extraction flow of diesel engine is comparatively large, the air speed of SCR is too high, so just greatly reduces NO
xconversion ratio.
Therefore, a kind of novel emission from vehicles processing system is provided to be necessary.
Model utility content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of varying vehicle exhaust emissions processing system, making tail gas conversion ratio when engine speed is different higher by switching switching valve, reducing the impact on engine fuel economy and power character simultaneously as far as possible.
For achieving the above object and other relevant objects, the utility model provides a kind of varying vehicle exhaust emissions processing system, and described varying vehicle exhaust emissions processing system at least comprises:
Vehicle body;
Outlet pipe, is connected with described vehicle body; Described outlet pipe is connected with oxidation catalytic converter and is connected to the selective catalytic reduction reaction unit in described oxidation catalytic converter downstream;
Exhaust bypass pipe, between the outlet pipe being communicated in described oxidation catalytic converter two ends;
Switching valve, is arranged on described exhaust bypass pipe; Control described switching valve by the control system of motor to open or close.
One as varying vehicle exhaust emissions processing system of the present utility model is optimized structure, and described switching valve is arranged on the joint of described exhaust bypass pipe and described outlet pipe.
One as varying vehicle exhaust emissions processing system of the present utility model is optimized structure, described motor is when medium speed or the slow-speed of revolution, described exhaust bypass pipe opened by described switching valve under the control of the control system of motor, and motor exhaust directly arrives selective catalytic reduction reaction unit through described by-pass line.
One as varying vehicle exhaust emissions processing system of the present utility model is optimized structure, during described motor height rotating speed, described switching valve cuts out described exhaust bypass pipe under the control of the control system of motor, and motor exhaust arrives described selective catalytic reduction reaction unit after described oxidation catalytic converter.
One as varying vehicle exhaust emissions processing system of the present utility model is optimized structure, and described vehicle body is diesel engine.
One as varying vehicle exhaust emissions processing system of the present utility model is optimized structure, and described motor is alcohol engine.
One as varying vehicle exhaust emissions processing system of the present utility model is optimized structure, and described emission from vehicles processing system also comprises the particulate filter being connected to described selective catalytic reduction reaction unit downstream.
One as varying vehicle exhaust emissions processing system of the present utility model is optimized structure, and described emission from vehicles processing system also comprises the NO be arranged near the outlet of described oxidation catalytic converter
xadsorber.
One as varying vehicle exhaust emissions processing system of the present utility model is optimized structure, described NO
xadsorber comprises the coating be coated on described oxidation catalytic converter.
As mentioned above, varying vehicle exhaust emissions processing system of the present utility model, described varying vehicle exhaust emissions processing system at least comprises structure: vehicle body; Outlet pipe, is connected with described vehicle body; Described outlet pipe is connected with oxidation catalytic converter and is connected to the selective catalytic reduction reaction unit in described oxidation catalytic converter downstream; Exhaust bypass pipe, between the outlet pipe being communicated in described oxidation catalytic converter two ends; Switching valve, is arranged on described exhaust bypass pipe; Described switching valve controls it by the control system of motor and opens or closes; Described vehicle body is diesel engine.The utility model by arranging exhaust bypass pipe and switching valve in discharge treating system, make motor under different rotating speeds, the path that tail gas passes through can be switched, both can ensure that diesel engine reaches the standard of discharge, the impact on engine power performance and Economy can be reduced again as far as possible.
Accompanying drawing explanation
Fig. 1 is the structural representation of varying vehicle exhaust emissions processing system of the present utility model.
Element numbers explanation
1 outlet pipe
2 oxidation catalytic converters
3 selective catalytic reduction reactions
4 tailpipes
5 exhaust bypass pipes
6 switching valves
The control system of 7 motors
Embodiment
By particular specific embodiment, mode of execution of the present utility model is described below, person skilled in the art scholar the content disclosed by this specification can understand other advantages of the present utility model and effect easily.
Refer to accompanying drawing.Notice, structure, ratio, size etc. that this specification institute accompanying drawings illustrates, content all only in order to coordinate specification to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, still all should drop on technology contents that the utility model discloses and obtain in the scope that can contain.Simultaneously, quote in this specification as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the utility model.
As shown in Figure 1, the utility model provides a kind of varying vehicle exhaust emissions processing system, and described varying vehicle exhaust emissions processing system at least comprises: vehicle body, outlet pipe 1, oxidation catalytic converter (DOC) 2, selective catalytic reduction reaction unit (SCR) 3, exhaust bypass pipe 5 and switching valve 6.
Described vehicle body is diesel engine.The motor of described diesel engine can be alcohol engine, and described alcohol engine comprises the motor of pure burning ethanol fuel, the motor of blend-burning ethanol fuel, or adopts the motor using alcohol ate as part or all of fuel of exhaust gas recirculation.Described alcohol engine is connected with control system 7 signal of motor.
Described outlet pipe 1 is connected with described vehicle body, for discharging the tail gas that vehicle body produces.Described outlet pipe 1 can be steel, iron material or titanium alloy material.
Described oxidation catalytic converter 2 is arranged on described outlet pipe 1, and the tail gas of discharging from vehicle body can directly through oxidation catalytic converter 2.Catalyzer in described oxidation catalytic converter 2 is to be oxidized the carbon hydride that is present in exhaust stream and carbon monoxide becomes carbon dioxide and water.Oxidation catalytic converter 2 also can be used for converting the nitrous oxide discharged in engine air flow (NO) to nitrogen dioxide (NO
2).
Described selective catalytic reduction reaction unit 3 is arranged at the downstream of the oxidation catalytic converter 2 on outlet pipe 1, in SCR, and nitrogen oxide (NO
x) react with reducing agent, it is injected into by dosing system and needs to be adsorbed in the tail gas stream on SCR catalyst, and the dosage reagent (such as urea) of injection decomposes and forms ammonia (NH
3), NH
3reducing agent, its for NO
xreact, with by NO
xbe reduced into nitrogen (N
2) and water (H
2o).
Described exhaust bypass pipe 5 is communicated with between the outlet pipe at described oxidation catalytic converter 2 two ends; Namely described exhaust bypass pipe 5 is arranged side by side being connected on outlet pipe 1 with oxidation catalytic converter 2.
Described exhaust bypass pipe 5 is also provided with switching valve 6.Preferably, described switching valve 6 is arranged on the joint of described exhaust bypass pipe 5 and outlet pipe 1.As shown in Figure 1, switching valve 6 is arranged on the upstream line joint of described oxidation catalytic converter 2.Described switching valve 6 controlled by engine control system (ECU) 7, thus realizes opening or closing of described switching valve 6, changes the trend of exhaust passageway.
When high engine speeds high-load operation, diesel exhaust gas flow is comparatively large, causes selective catalytic reduction reaction unit (SCR) 3 air speeds too high, makes NO
xconversion ratio greatly reduce, in this case, control switching valve 6 by engine control system 7 and close exhaust bypass pipe 5, make diesel engine vent gas air-flow all through oxidation catalytic converter 2, utilize oxidation catalytic converter 2 first NO to be converted into NO
2, improve the NO entering selecting property catalytic reduction reaction unit 3
2with the ratio of NO, accelerate the catalytic reduction reaction speed of selecting property catalytic reduction reaction unit 3 inside, thus improve NO
xconversion ratio, compensate for the NO that causes because air speed increases
xconversion ratio reduces, and reaches the requirement of diesel emission.
And when motor moderate rotation or the slow-speed of revolution run, selective catalytic reduction reaction 3 unit air speed is not high, just can make NO by the redox reaction in selective catalytic reduction reaction unit 3
xdischarge reaches emission request.Control switching valve 6 by engine control system 7 and open exhaust bypass pipe 5, due to the resistance of oxidation catalytic converter 2, major part tail gas directly enters selective catalytic reduction reaction unit 3 by exhaust bypass pipe 5, decreases the impact on engine power performance and Economy.
In a word, described motor is when running up, and described switching valve cuts out exhaust bypass pipe 5 under the control of the engine control system, makes tail gas almost all flow through DOC, arrives SCR afterwards.
Described motor is when moderate rotation or the slow-speed of revolution, and exhaust bypass pipe 5 opened under the control of the engine control system by described switching valve, directly arrives SCR after making tail gas major part flow through described exhaust bypass pipe 5.
Further, described varying vehicle exhaust emissions processing system can also comprise the particulate filter (diagram) being connected to described selective catalytic reduction reaction unit 3 downstream, the particulate matter be used in acquisition and processing tail gas.
Described varying vehicle exhaust emissions processing system also comprises and is arranged on described oxidation catalytic converter 2 and exports neighbouring NO
xadsorber (diagram), Absorbable rod also stores through the NO in the tail gas of described oxidation catalytic converter 2
x.Described NO
xadsorber can be coated in the coating on described oxidation catalytic converter 2.
Finally, the tail gas reaching emission request is discharged via tailpipe 4.
In sum, the varying vehicle exhaust emissions processing system that the utility model provides, at least comprises structure: vehicle body; Outlet pipe, is connected with described vehicle body; Described outlet pipe is connected with oxidation catalytic converter and is connected to the selective catalytic reduction reaction unit in described oxidation catalytic converter downstream; Exhaust bypass pipe, between the outlet pipe being communicated in described oxidation catalytic converter two ends; Switching valve, is arranged on described exhaust bypass pipe; Described switching valve controls it by the control system of motor and opens or closes; Described vehicle body is diesel engine.By arranging exhaust bypass pipe and switching valve in discharge treating system, make motor under different rotating speeds, the path that tail gas passes through can be switched, both can ensure that diesel engine reaches the standard of discharge, the impact on engine power performance and Economy can be reduced again as far as possible.
So the utility model effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or changes.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses, must be contained by claim of the present utility model.
Claims (9)
1. a varying vehicle exhaust emissions processing system, described emission from vehicles processing system at least comprises:
Vehicle body;
Outlet pipe, is connected with described vehicle body; Described outlet pipe is connected with oxidation catalytic converter and is connected to the selective catalytic reduction reaction unit in described oxidation catalytic converter downstream;
Exhaust bypass pipe, between the outlet pipe being communicated in described oxidation catalytic converter two ends;
Switching valve, is arranged on described exhaust bypass pipe; Described switching valve is connected with the control system of motor.
2. varying vehicle exhaust emissions processing system according to claim 1, is characterized in that: described switching valve is arranged on the joint of described exhaust bypass pipe and described outlet pipe.
3. varying vehicle exhaust emissions processing system according to claim 1, it is characterized in that: described motor is when moderate rotation or the slow-speed of revolution, described exhaust bypass pipe opened by described switching valve under the control of the control system of motor, and motor exhaust directly arrives described selective catalytic reduction reaction unit through described exhaust bypass pipe.
4. varying vehicle exhaust emissions processing system according to claim 1, it is characterized in that: the rotating speed of described motor is when high rotating speed, described switching valve cuts out described exhaust bypass pipe under the control of the control system of motor, and motor exhaust arrives described selective catalytic reduction reaction unit after described oxidation catalytic converter.
5. varying vehicle exhaust emissions processing system according to claim 1, is characterized in that: described vehicle body is diesel engine.
6. varying vehicle exhaust emissions processing system according to claim 1, is characterized in that: described motor is alcohol engine.
7. varying vehicle exhaust emissions processing system according to claim 1, is characterized in that: described emission from vehicles processing system also comprises the particulate filter being connected to described selective catalytic reduction reaction unit downstream.
8. varying vehicle exhaust emissions processing system according to claim 1, is characterized in that: described emission from vehicles processing system also comprises the NO be arranged near the outlet of described oxidation catalytic converter
xadsorber.
9. varying vehicle exhaust emissions processing system according to claim 8, is characterized in that: described NO
xadsorber comprises the coating be coated on described oxidation catalytic converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420200480.1U CN204163811U (en) | 2014-04-23 | 2014-04-23 | A kind of varying vehicle exhaust emissions processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420200480.1U CN204163811U (en) | 2014-04-23 | 2014-04-23 | A kind of varying vehicle exhaust emissions processing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204163811U true CN204163811U (en) | 2015-02-18 |
Family
ID=52537510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420200480.1U Expired - Fee Related CN204163811U (en) | 2014-04-23 | 2014-04-23 | A kind of varying vehicle exhaust emissions processing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204163811U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781760A (en) * | 2016-03-24 | 2016-07-20 | 上海海事大学 | System and method for reducing NOx emission of marine diesel engine |
| CN106401703A (en) * | 2016-05-16 | 2017-02-15 | 云南菲尔特环保科技股份有限公司 | Tail gas purification system and tail gas purification method for diesel generator set |
| CN106703944A (en) * | 2015-11-18 | 2017-05-24 | 福特环球技术公司 | System and method for bypassing a particulate filter |
| CN111425286A (en) * | 2020-03-31 | 2020-07-17 | 广西玉柴机器股份有限公司 | Method and system for controlling tail gas emission of gas engine |
-
2014
- 2014-04-23 CN CN201420200480.1U patent/CN204163811U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703944A (en) * | 2015-11-18 | 2017-05-24 | 福特环球技术公司 | System and method for bypassing a particulate filter |
| CN106703944B (en) * | 2015-11-18 | 2020-08-11 | 福特环球技术公司 | System and method for bypassing a particulate filter |
| CN105781760A (en) * | 2016-03-24 | 2016-07-20 | 上海海事大学 | System and method for reducing NOx emission of marine diesel engine |
| CN106401703A (en) * | 2016-05-16 | 2017-02-15 | 云南菲尔特环保科技股份有限公司 | Tail gas purification system and tail gas purification method for diesel generator set |
| CN106401703B (en) * | 2016-05-16 | 2019-11-08 | 云南菲尔特环保科技股份有限公司 | Tail gas from diesel electric generator purification system and purification method |
| CN111425286A (en) * | 2020-03-31 | 2020-07-17 | 广西玉柴机器股份有限公司 | Method and system for controlling tail gas emission of gas engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10557397B2 (en) | Asynchronous reductant insertion in aftertreatment systems | |
| US8491845B2 (en) | Low temperature selective catalytic reduction catalyst and associated systems and methods | |
| Guo et al. | A short review of treatment methods of marine diesel engine exhaust gases | |
| US8245500B2 (en) | Dual catalyst NOx reduction system for exhaust from lean burn internal combustion engines | |
| CN204163811U (en) | A kind of varying vehicle exhaust emissions processing system | |
| CN103386252A (en) | Nitric oxide oxidation over silver-based catalyst | |
| CN103615299B (en) | The method and system of design diesel engine post-processing system | |
| CN102486110B (en) | For predicting the regeneration method of DeNOx catalyst and using the exhaust system of the method | |
| WO2009017598A1 (en) | Scr emissions control system | |
| CN110925070A (en) | Post-processing device for realizing ultralow emission control of gas engine | |
| Dong et al. | Study of NOx selective catalytic reduction by ethanol over Ag/Al2O3 catalyst on a HD diesel engine | |
| Liang et al. | Compact research for maritime selective catalytic reduction reactor based on response surface methodology | |
| CN104614185A (en) | Engine emission test rack | |
| GB2481057A (en) | Exhaust system comprising a catalyst with a downstream filter and SCR catalyst | |
| CN105736161A (en) | Control method of variable geometry turbocharger (VGT) nozzle ring actuator | |
| CN103726912B (en) | The flexible integration devices and methods therefor that a kind of diesel engine vent gas purifies | |
| CN103291427A (en) | Selective catalytic reduction device control methods and systems | |
| Lee | Modeling urea-selective catalyst reduction with vanadium catalyst based on NH3 temperature programming desorption experiment | |
| CN211287857U (en) | Post-processing device for realizing ultralow emission control of gas engine | |
| Prabhakar et al. | Control of emission characteristics by using Selective Catalytic Reduction (SCR) in DI diesel engine | |
| CN204200316U (en) | Urea SCR (Selective catalytic reduction) aftertreatment device of methanol fuel engine | |
| US20190390589A1 (en) | Passive nitric oxide storage catalyst management | |
| CN202001087U (en) | Automobile exhaust after-treatment device through selective catalytic reduction | |
| CN210013737U (en) | Low-temperature adsorption after-treatment device for motor vehicle tail gas | |
| CN110725736A (en) | Method for operating an exhaust gas aftertreatment device, control unit for an internal combustion engine and internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20150218 Termination date: 20180423 |