CN109826694A - The control method of exhaust gas purification system and vehicle and exhaust gas purification system - Google Patents
The control method of exhaust gas purification system and vehicle and exhaust gas purification system Download PDFInfo
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- CN109826694A CN109826694A CN201910001735.9A CN201910001735A CN109826694A CN 109826694 A CN109826694 A CN 109826694A CN 201910001735 A CN201910001735 A CN 201910001735A CN 109826694 A CN109826694 A CN 109826694A
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Abstract
The invention discloses the control methods of a kind of exhaust gas purification system and vehicle and exhaust gas purification system, and wherein exhaust gas purification system includes: air inlet pipe, the first intermediate connection pipe, the second intermediate connection pipe and control valve.Flow sensor and the first temperature sensor are provided in the air inlet pipe；The first intermediate connection pipe is connected to air inlet pipe described in the second intermediate connection Guan Junyu, and has catalyst converter in the first intermediate connection pipe or the second intermediate connection pipe；The control valve is arranged between the air inlet pipe and the first intermediate connection pipe and the second intermediate connection pipe, and the control valve is arranged for that the air inlet pipe is selectively connected to the first intermediate connection pipe or the second intermediate connection pipe.The exhaust gas purification system can make tail gas flow through different pipelines according to the case where flow sensor and the first temperature sensor detection tail gas, to reach better vent gas treatment effect.
Description
Technical field
The present invention relates to technical field of vehicle, net in particular to a kind of exhaust gas purification system and vehicle and tail gas
The control method of change system.
Background technique
The exhaust temperature of conventional gasoline vehicle is higher, and the aging speed of catalyst converter is made to become faster, and after certain durable mileage, tail gas is net
Change ability declines to a great extent, and it is exceeded that vehicle is easy discharge.And the meeting dissipated heat of the pipeline due to connecting catalyst converter and grain catcher,
The exhaust temperature for reaching grain catcher is insufficient, will lead to soot bulk deposition in grain catcher, makes vent gas treatment effect
It reduces, there are rooms for improvement.
Summary of the invention
The present invention is directed to solve one of above-mentioned technical problem in the prior art at least to a certain extent.For this purpose, this hair
Bright to propose a kind of exhaust gas purification system, which can detect tail gas according to flow sensor and the first temperature sensor
The case where so that tail gas is flowed through different pipelines, to reach better vent gas treatment effect.
The invention also provides a kind of vehicles with above-mentioned exhaust gas purification system.
The exhaust gas purification system of embodiment according to the present invention, comprising: air inlet pipe is provided with flow biography in the air inlet pipe
Sensor and the first temperature sensor；First intermediate connection pipe and the second intermediate connection pipe, the first intermediate connection pipe and described
The connection of air inlet pipe described in second intermediate connection Guan Junyu, and tool in the first intermediate connection pipe or the second intermediate connection pipe
There is catalyst converter；Control valve, the control valve are arranged in the air inlet pipe and the first intermediate connection pipe and described second
Between intermediate connection pipe, the control valve, which is arranged for that selectively the air inlet pipe being connected among described first, to be connected
Siphunculus or the second intermediate connection pipe.
The exhaust gas purification system of embodiment according to the present invention, the exhaust gas purification system can be according to flow sensors and first
Temperature sensor detects the case where tail gas to make tail gas flow through different pipelines, to reach better vent gas treatment effect.
In addition, can also have following additional technical feature according to the exhaust gas purification system of inventive embodiments:
According to some embodiments of the present invention, the control valve has air inlet, the first gas outlet and the second gas outlet,
The air inlet is connected with the end of the air inlet pipe, the front end phase of first air inlet and the first intermediate connection pipe
Even, second gas outlet is connected with the front end of the second intermediate connection pipe.
According to some embodiments of the present invention, the control valve is control panel.
According to some embodiments of the present invention, the exhaust gas purification system further include: escape pipe, the escape pipe with it is described
The end of first intermediate connection pipe is connected with the end of the second intermediate connection pipe, the escape pipe setting having heaters and the second temperature
Sensor is spent, the second temperature sensor and the heater communicate.
According to some embodiments of the present invention, the end of the escape pipe is additionally provided with grain catcher.
According to some embodiments of the present invention, the heater grain catcher is closer to the air inlet pipe.
According to some embodiments of the present invention, the first intermediate connection pipe is opened up with the second intermediate connection pipe interval
It sets, and the first heat insulation structural is provided therebetween.
Vehicle according to a further aspect of the invention, including above-mentioned exhaust gas purification system.
The present invention also proposes a kind of control method of exhaust gas purification system, and it is net which can preferably control tail gas
Change system carries out vent gas treatment.
The control method of the exhaust gas purification system of embodiment according to the present invention, the exhaust gas purification system include air inlet
It manages, is provided with flow sensor and the first temperature sensor in the air inlet pipe；First intermediate connection pipe and the second intermediate connection
Pipe, the first intermediate connection pipe is connected to air inlet pipe described in the second intermediate connection Guan Junyu, and is connected among described first
There is catalyst converter in siphunculus or the second intermediate connection pipe；Control valve, control valve setting the air inlet pipe with
Between the first intermediate connection pipe and the second intermediate connection pipe, the control valve is arranged for institute selectively
It states air inlet pipe and is connected to the first intermediate connection pipe or the second intermediate connection pipe, the control method includes following step
It is rapid: the exhaust flow Q in the air inlet pipe is detected using the flow sensor；Institute is detected using first temperature sensor
State the exhaust temperature T1 in air inlet pipe；If Q and T1 meets relational expression simultaneously: Q >=200kg/h, T1 >=750 DEG C, the then control
The air inlet pipe is separated with the first intermediate connection pipe and is connected to the second intermediate connection pipe by valve；If Q and T1 is discontented
The above-mentioned any relationship of foot, then the air inlet pipe and the second intermediate connection pipe are separated and are connected to described the by the control valve
One intermediate connection pipe.
According to some embodiments of the present invention, the exhaust gas purification system further include: escape pipe, the escape pipe with it is described
The end of first intermediate connection pipe is connected with the end of the second intermediate connection pipe, the escape pipe setting having heaters and the second temperature
Sensor is spent, the second temperature sensor and the heater communicate；The control method further include: utilize second temperature
Degree sensor detects the exhaust temperature T2 in the escape pipe, if T2 meets relational expression: the heating is closed in T2 >=550 DEG C
Device；If T2 meets relational expression: T2≤550 DEG C start the heater.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of exhaust gas purification system according to an embodiment of the present invention；
Fig. 2 is the flow chart of the control method of exhaust gas purification system according to an embodiment of the present invention.
Appended drawing reference:
Exhaust gas purification system 100, air inlet pipe 1, flow sensor 11, the first temperature sensor 12, the first intermediate connection pipe
2, the second intermediate connection pipe 3, catalyst converter 21, control valve 4, escape pipe 5, heater 51, second temperature sensor 52, particle is caught
Storage 53.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is at least two, such as two
It is a, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected or can communicate with each other；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the interaction relationship of connection or two elements inside two elements.For the ordinary skill in the art,
The specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
Exhaust gas purification system 100 according to an embodiment of the present invention is described below with reference to Fig. 1.
Exhaust gas purification system 100 according to an embodiment of the present invention may include: air inlet pipe 1, the first intermediate connection pipe 2,
Two intermediate connection pipes 3 and control valve 4.
As shown in Figure 1, being provided with flow sensor 11 and the first temperature sensor 12 in air inlet pipe 1.Flow sensor 11
For acquiring the flow signal of 1 inner exhaust gas of air inlet pipe, the first temperature sensor 12 is then for acquiring the temperature of 1 inlet of air inlet pipe
Degree.
The present invention is so that catalyst converter 21 is played better catalyzed conversion effect to tail gas, and can preferably protect
Catalyst converter 21, the embodiment of the present invention is provided with two intermediate connection pipelines, among respectively the first intermediate connection pipe 2 and second
Communicating pipe 3, the two are connected to air inlet pipe 1, and have catalyst converter 21 in the first intermediate connection pipe 2 or the second intermediate connection pipe 3,
It is illustrated so that catalyst converter 21 is arranged in the first intermediate connection pipe 2 as an example below.
Since the excessively high tail gas of temperature will cause the damage of catalyst converter 21, the service life of catalyst converter 21 is reduced, therefore, when
When exhaust temperature is higher than certain numerical value, it may be selected to allow tail gas individually to flow through the second intermediate connection pipe 3, and remaining situation, then it selects
Tail gas is allowed individually to flow through the first intermediate connection pipe 2.
Referring to Fig.1, control valve 4 is arranged between air inlet pipe 1 and the first intermediate connection pipe 2 and the second intermediate connection pipe 3,
Control valve 4 is arranged for that air inlet pipe 1 is selectively connected to the first intermediate connection pipe 2 or the second intermediate connection pipe 3.
Specifically, when the first temperature sensor 12 detects that the temperature of the tail gas in air inlet pipe 1 is higher than certain numerical value and stream
When quantity sensor 11 detects that the flow velocity of tail gas is higher than certain numerical value, control valve 4 is selected air inlet pipe 1 and the second intermediate connection
Pipe 3 is connected to, and remaining situation, control valve 4 then select for air inlet pipe 1 to be connected to the first intermediate connection pipe 2.
Exhaust gas purification system 100 according to an embodiment of the present invention, the exhaust gas purification system 100 can be according to flow sensors 11
The case where detecting tail gas with first temperature sensor 12 makes tail gas flow through different pipelines, to reach better vent gas treatment effect
Fruit.
Embodiment as one preferred, control valve 4 have air inlet, the first gas outlet and the second gas outlet, air inlet
Mouth is connected with the end of air inlet pipe 1, and the first air inlet is connected with the front end of the first intermediate connection pipe 2, the second gas outlet and second
The front end of intermediate connection pipe 3 is connected.
Specifically, when the first temperature sensor 12 detects that the temperature of the tail gas in air inlet pipe 1 is higher than certain numerical value and stream
When quantity sensor 11 detects that the flow velocity of tail gas is higher than certain numerical value, control valve 4 opens air inlet and the second gas outlet simultaneously
And close the first gas outlet makes tail gas be merely able to flow through the second intermediate connection to be connected to air inlet pipe 1 and the second intermediate connection pipe 3
Pipe 3.And when remaining situation, the second gas outlet is opened and closed to air inlet and the first gas outlet then by control valve 4, with even
Logical air inlet pipe 1 and the first intermediate connection pipe 2, make tail gas be merely able to flow through the first intermediate connection pipe 2.
As another preferred embodiment, control valve 4 is control panel.Air inlet pipe 1, the first intermediate connection pipe 2 and
The pipe structure that two intermediate connection pipes 3 can be integrated, control panel are arranged between three to block the first intermediate connection pipe 2 or the second
Intermediate connection pipe 3.
Specifically, when the first temperature sensor 12 detects that the temperature of the tail gas in air inlet pipe 1 is higher than certain numerical value and stream
When quantity sensor 11 detects that the flow velocity of tail gas is higher than certain numerical value, control panel will be flapped toward the first intermediate connection pipe 2 and block
First intermediate connection pipe 2 makes tail gas be merely able to flow through the second intermediate connection pipe to be connected to air inlet pipe 1 and the second intermediate connection pipe 3
3.And when remaining situation, control panel will be flapped toward the second intermediate connection pipe 3 and block the second intermediate connection pipe 3, be connected into
Tracheae 1 and the first intermediate connection pipe 2 make tail gas be merely able to flow through the first intermediate connection pipe 2.
According to some embodiments of the present invention, exhaust gas purification system 100 further include: escape pipe 5, in escape pipe 5 and first
Between the end of communicating pipe 2 be connected with the end of the second intermediate connection pipe 3, having heaters 51 is arranged in escape pipe 5 and second temperature passes
Sensor 52, second temperature sensor 52 and heater 51 communicate.
Wherein, second temperature sensor 52 is used to detect the temperature of tail gas in escape pipe 5, if the temperature of escape pipe 5 is higher than
Certain numerical value then needs to close heater 51.Remaining situation then needs to start heater 51.
As shown in Figure 1, the end of escape pipe 5 is additionally provided with grain catcher 53.Grain catcher 53 is for capturing tail gas
In particle, avoid it from being discharged into atmosphere and pollute environment.Wherein, the exhaust temperature in escape pipe 5 is passed lower than second temperature
When numerical value determined by sensor 52 (soot regeneration temperature), heater 51 is opened, and so that exhaust gas flow is heated up, is caught particle to reach
The purpose of soot regeneration in storage 53.And (the soot when the temperature of tail gas is higher than numerical value determined by second temperature sensor 52
Regeneration temperature), then it does not need to open heater 51, to save the energy.
Further, heater 51 is compared with grain catcher 53 closer to air inlet pipe 1.Thus, it is ensured that flow into escape pipe 5
The heating that tail gas can receive heater 51 at the first time again passes through grain catcher 53, in order to which grain catcher 53 absorbs tail
Particulate matter in gas.
Embodiment as one preferred, the first intermediate connection pipe 2 are spaced apart setting, and two with the second intermediate connection pipe 3
The first heat insulation structural is provided between person.Since the variation of temperature can affect to catalyst converter 21, in order to keep away
Exempt from the high-temperature tail gas flowed through in the second intermediate connection pipe 3 to impact the catalyst converter 21 on the first intermediate connection pipe 2, makes first
Intermediate connection pipe 2 is spaced apart setting with the second intermediate connection pipe 3 to achieve the purpose that prevent heat transfer, and between
It is further heat-insulated to carry out that the first heat insulation structural is arranged.
The vehicle of embodiment according to a further aspect of the invention, including exhaust gas purification system 100 described in above-described embodiment.
Other constructions such as speed changer, braking system, steering system etc. for vehicle be the prior art and be this field skill
Known to art personnel, therefore do not elaborate for other constructions of vehicle here.
The control method of exhaust gas purification system 100 according to an embodiment of the present invention is described below with reference to Fig. 2.
As shown in Fig. 2, control method the following steps are included:
The exhaust flow Q in air inlet pipe 1 is detected first with flow sensor 11, and utilizes the first temperature sensor 12
The exhaust temperature T1 in air inlet pipe 1 is detected, and the Q and T1 that will test feed back to the control system of vehicle, are done by control system
Judge out.
If Q and T1 meets relational expression simultaneously: Q >=200kg/h, T1 >=750 DEG C, then control valve 4 is by air inlet pipe 1 and first
Intermediate connection pipe 2 separates and is connected to the second intermediate connection pipe 3, and tail gas can only be by the second intermediate connection pipe 3, to protect catalyst converter
21。
If Q and T1 are unsatisfactory for above-mentioned any relationship, control valve 4 by air inlet pipe 1 and the partition of the second intermediate connection pipe 3 and
It is connected to the first intermediate connection pipe 2, then tail gas can only pass through the first intermediate connection pipe 2.
According to some embodiments of the present invention, exhaust gas purification system 100 further include: escape pipe 5, in escape pipe 5 and first
Between the end of communicating pipe 2 be connected with the end of the second intermediate connection pipe 3, having heaters 51 is arranged in escape pipe 5 and second temperature passes
Sensor 52, second temperature sensor 52 and heater 51 communicate.
Wherein, second temperature sensor 52 is used to detect the temperature of tail gas in escape pipe 5, if the tail gas in escape pipe 5
Temperature is higher than certain numerical value, then needs to close heater 51.Remaining situation then needs to start heater 51.
As shown in Fig. 2, control method further include:
When tail gas flows into escape pipe 5, the exhaust temperature T2 in escape pipe 5 is detected using second temperature sensor 52,
And the T2 that will test feeds back to the control system of vehicle, is judged by control system.
If T2 meets relational expression: heater 51 is closed in T2 >=550 DEG C.
If T2 meets relational expression: T2≤550 DEG C start heater 51, and heater 51 carries out the tail gas in escape pipe 5
Heating, to achieve the purpose that make soot regeneration in grain catcher 53.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
What can be combined in any suitable manner in one or more embodiment or examples.In addition, those skilled in the art can say this
Different embodiments or examples described in bright book are engaged and are combined.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of exhaust gas purification system characterized by comprising
Air inlet pipe is provided with flow sensor and the first temperature sensor in the air inlet pipe；
First intermediate connection pipe and the second intermediate connection pipe, the first intermediate connection pipe and the second intermediate connection Guan Junyu
The air inlet pipe connection, and there is catalyst converter in the first intermediate connection pipe or the second intermediate connection pipe；
Control valve, the control valve setting connect among the air inlet pipe and the first intermediate connection pipe and described second
Between siphunculus, the control valve be arranged for selectively by the air inlet pipe be connected to the first intermediate connection pipe or
The second intermediate connection pipe.
2. exhaust gas purification system according to claim 1, which is characterized in that the control valve has air inlet, first
Gas outlet and the second gas outlet, the air inlet are connected with the end of the air inlet pipe, first air inlet and described first
The front end of intermediate connection pipe is connected, and second gas outlet is connected with the front end of the second intermediate connection pipe.
3. exhaust gas purification system according to claim 1, which is characterized in that the control valve is control panel.
4. exhaust gas purification system according to claim 1, which is characterized in that further include: escape pipe, the escape pipe and institute
The end for stating the first intermediate connection pipe is connected with the end of the second intermediate connection pipe, and having heaters and second is arranged in the escape pipe
Temperature sensor, the second temperature sensor and the heater communicate.
5. exhaust gas purification system according to claim 4, which is characterized in that the end of the escape pipe is additionally provided with particle
Trap.
6. exhaust gas purification system according to claim 5, which is characterized in that the heater grain catcher is more
Close to the air inlet pipe.
7. exhaust gas purification system according to claim 1, which is characterized in that the first intermediate connection pipe and described second
Intermediate connection pipe is spaced apart setting, and the first heat insulation structural is provided therebetween.
8. a kind of vehicle, which is characterized in that including exhaust gas purification system described according to claim 1 any one of -7.
9. a kind of control method of exhaust gas purification system, which is characterized in that the exhaust gas purification system includes air inlet pipe, it is described into
Flow sensor and the first temperature sensor are provided on tracheae；First intermediate connection pipe and the second intermediate connection pipe, described
One intermediate connection pipe is connected to air inlet pipe described in the second intermediate connection Guan Junyu, and the first intermediate connection pipe or described
There is catalyst converter in second intermediate connection pipe；Control valve, the control valve are arranged in the air inlet pipe and described first
Between between communicating pipe and the second intermediate connection pipe, the control valve is arranged for selectively connecting the air inlet pipe
Pass to the first intermediate connection pipe or the second intermediate connection pipe, the control method the following steps are included:
The exhaust flow Q in the air inlet pipe is detected using the flow sensor；
The exhaust temperature T1 in the air inlet pipe is detected using first temperature sensor；
If Q and T1 meets relational expression simultaneously: Q >=200kg/h, T1 >=750 DEG C, then the control valve is by the air inlet pipe and institute
It states the partition of the first intermediate connection pipe and is connected to the second intermediate connection pipe；
If Q and T1 are unsatisfactory for above-mentioned any relationship, the control valve is by the air inlet pipe and the second intermediate connection pipe
Separate and is connected to the first intermediate connection pipe.
10. the control method of exhaust gas purification system according to claim 9, which is characterized in that the exhaust gas purification system
Further include: escape pipe, the escape pipe are connected with the end of the end of the first intermediate connection pipe and the second intermediate connection pipe,
The escape pipe setting having heaters and second temperature sensor, the second temperature sensor and the heater communicate；
The control method further include:
The exhaust temperature T2 in the escape pipe is detected using the second temperature sensor,
If T2 meets relational expression: the heater is closed in T2 >=550 DEG C；
If T2 meets relational expression: T2≤550 DEG C start the heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910001735.9A CN109826694A (en) | 2019-01-02 | 2019-01-02 | The control method of exhaust gas purification system and vehicle and exhaust gas purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910001735.9A CN109826694A (en) | 2019-01-02 | 2019-01-02 | The control method of exhaust gas purification system and vehicle and exhaust gas purification system |
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| CN109826694A true CN109826694A (en) | 2019-05-31 |
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ID=66860203
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| JPH08319820A (en) * | 1995-05-24 | 1996-12-03 | Hino Motors Ltd | Exhaust emission control device |
| CN101158302A (en) * | 2007-11-07 | 2008-04-09 | 奇瑞汽车有限公司 | Diesel engine post-processing system |
| JP2008121493A (en) * | 2006-11-10 | 2008-05-29 | Hino Motors Ltd | Exhaust emission control device |
| CN101981281A (en) * | 2008-04-02 | 2011-02-23 | 马克卡车公司 | System and method for treating diesel exhaust gases |
| JP2013124610A (en) * | 2011-12-15 | 2013-06-24 | Mitsubishi Motors Corp | Exhaust emission control device of internal combustion engine |
| CN106460611A (en) * | 2014-05-23 | 2017-02-22 | 天纳克汽车经营有限公司 | Exhaust aftertreatment system with low-temperature SCR |
-
2019
- 2019-01-02 CN CN201910001735.9A patent/CN109826694A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08319820A (en) * | 1995-05-24 | 1996-12-03 | Hino Motors Ltd | Exhaust emission control device |
| JP2008121493A (en) * | 2006-11-10 | 2008-05-29 | Hino Motors Ltd | Exhaust emission control device |
| CN101158302A (en) * | 2007-11-07 | 2008-04-09 | 奇瑞汽车有限公司 | Diesel engine post-processing system |
| CN101981281A (en) * | 2008-04-02 | 2011-02-23 | 马克卡车公司 | System and method for treating diesel exhaust gases |
| JP2013124610A (en) * | 2011-12-15 | 2013-06-24 | Mitsubishi Motors Corp | Exhaust emission control device of internal combustion engine |
| CN106460611A (en) * | 2014-05-23 | 2017-02-22 | 天纳克汽车经营有限公司 | Exhaust aftertreatment system with low-temperature SCR |
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Application publication date: 20190531 |