CN108150296A - Binary channels SCR catalytic convention designs and its control method - Google Patents
Binary channels SCR catalytic convention designs and its control method Download PDFInfo
- Publication number
- CN108150296A CN108150296A CN201711445875.2A CN201711445875A CN108150296A CN 108150296 A CN108150296 A CN 108150296A CN 201711445875 A CN201711445875 A CN 201711445875A CN 108150296 A CN108150296 A CN 108150296A
- Authority
- CN
- China
- Prior art keywords
- binary channels
- scr catalytic
- reversal valve
- catalytic convention
- vehicle
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention provides a kind of binary channels SCR catalytic convention designs and its control methods, binary channels SCR catalytic convention designs include first exhaust passage and second exhaust channel, the inlet of the first exhaust passage is equipped with the first reversal valve, the inlet of the second exhaust channel is equipped with the second reversal valve, first reversal valve is communicated to connect with second reversal valve with the controller of engine, the controller can control first reversal valve to open or close the first exhaust passage, the controller can control second reversal valve to open or close the second exhaust channel.When the present invention can ensure vehicle lower long slope or slide for a long time at a high speed, the temperature of catalyst and carrier is not cooled, and will not cause environmental pollution in SCR catalytic convention designs.
Description
Technical field
The present invention relates to engine SCR post-processing technology fields, more particularly to a kind of binary channels SCR catalytic convention designs
And its control method.
Background technology
The after-treatment system of heavy goods vehicles is mainly SCR system at present, and the temperature of catalyst is to influence SCR to NOXProcessing effect
One key factor of rate.Heavy goods vehicles are essentially electric-control system at present, when vehicle band shelves lower long slope or over long distances slide when, only
Wanting engine speed, then the distributive value of engine is zero, is not had in cylinder higher than the calibration value in control unit of engine ECU data
There is combustion reaction, the delivery temperature that can lead to engine is relatively low, and is generated at this time without pollutant, but exhaust gas still goes through SCR
Catalytic convention design.Existing SCR catalytic convention designs are only there are one channel, when relatively low delivery temperature turns by SCR catalysis
When makeup is put, cooling effect is played to the catalyst and carrier of SCR catalytic convention designs and inside, engine is again introduced into
During normal operating conditions, since the temperature inside SCR catalytic convention designs reduces, SCR catalytic convention designs can be reduced to NOX's
Transfer efficiency or even the stop-spraying for causing urea, it is exceeded so as to cause discharging, pollute environment.
The exhausting control of heavy-duty engine gradually turns to vehicle by engine pedestal at present, even if engine energy on rack
Enough meet the requirement of regulation, since the change of environmental condition, pipeline arrangement etc. also results in the super of discharge after being applied on vehicle
Mark, causes the pollution of environment.
Invention content
The purpose of the present invention is at least solving one of drawbacks described above and deficiency, which is to be achieved through the following technical solutions
's.
The present invention provides a kind of binary channels SCR catalytic convention designs, including first exhaust passage and second exhaust channel,
The inlet of the first exhaust passage is equipped with the first reversal valve, and the inlet of the second exhaust channel is equipped with the second commutation
Valve, first reversal valve are communicated to connect with second reversal valve with the controller of engine, and the controller can be controlled
It makes first reversal valve to open or close the first exhaust passage, the controller can control second reversal valve
The second exhaust channel is opened or closed.
Further, the noise elimination mechanism being arranged in the first exhaust passage is further included.
Further, carrier and catalysis of the first exhaust passage without the binary channels SCR catalytic convention designs
Agent, carrier and catalyst of the second exhaust channel Jing Guo the binary channels SCR catalytic convention designs.
Further, first reversal valve and second reversal valve are butterfly valve.
The present invention also provides a kind of control method of binary channels SCR catalytic convention designs, the binary channels SCR catalysis turns
Disguise the control method put according to above-mentioned binary channels SCR catalytic convention designs to be implemented, which is characterized in that including：
S1：Controller carries out logical operation according to the whole vehicle information and road information of reception, to the operating status of vehicle into
Row judges.
S2：According to the operating status of vehicle, controller controls first reversal valve or the second commutation Vavle switching institute
It states first exhaust passage or the second exhaust channel is exhausted.
Further, S2 steps include：
If vehicle is in band shelves sliding state, controller controls first reversal valve to open, controls second commutation
Valve is closed, and Vehicular exhaust is made to be vented by the first exhaust passage；
If vehicle is not at band shelves sliding state, controller controls first reversal valve to close, control described second to change
It is opened to valve, Vehicular exhaust is made to pass through the second exhaust channel vent.
Further, the vehicle is in and is in the state of downhill running including vehicle with shelves sliding state or vehicle is in
The state slided over long distances at a high speed.
Further, the Rule of judgment that the vehicle is in the state of downhill running is：Speed is set not less than the first speed
It definite value and keeps not declining in the speed certain time, engine speed is not less than the first speed setting value, gas pedal
Aperture is less than the first aperture setting value.
Further, the Rule of judgment that the vehicle is in the state of downhill running is：The engine speed is not less than
Second speed setting value, grade signal are not less than gradient setting value for descending and gradient size.
Further, the Rule of judgment of state that the high speed slides over long distances is：The speed is not less than the second speed
Setting value, the engine speed are not less than third speed setting value, and the gas pedal aperture is less than the second aperture setting value.
Advantages of the present invention is as follows：
(1) when binary channels SCR catalytic convention designs of the invention can ensure vehicle lower long slope or slide for a long time at a high speed,
The temperature of catalyst and carrier in SCR catalytic convention designs is not cooled.
(2) control logic of butterfly valve being capable of accurate judgement vehicle-state, guarantee lower long slope or high speed long-time in the present invention
When sliding, switching exhaust passage accurately and timely.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this field
Technical staff will become clear.Attached drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.
Fig. 1 is the structure diagram of binary channels SCR catalytic convention designs provided in an embodiment of the present invention.
Fig. 2 is the reversal valve control schematic diagram of binary channels SCR catalytic convention designs provided in an embodiment of the present invention.
Fig. 3 is the flow chart of the control method of binary channels SCR catalytic convention designs provided in an embodiment of the present invention.
Reference numeral is as follows in figure：
100- binary channels SCR catalytic convention designs
101- air inlet 102- exhaust outlets
103- carriers and catalyst
11- first exhaust passage 12- second exhaust channels
21- first butterfly valve 22- second butterfly valves
3- pair noise eliminations mechanism
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although this public affairs is shown in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to be best understood from the disclosure, and can be by this public affairs on the contrary, providing these embodiments
The range opened completely is communicated to those skilled in the art.
Fig. 1 shows the structure diagram of binary channels SCR catalytic convention designs provided according to the embodiment of the present invention.
As shown in Figure 1, motor exhaust by air inlet 101 enter in binary channels SCR catalytic convention designs 100 after discharge duct by
Exhaust outlet 102 is discharged.Binary channels SCR catalytic convention designs 100 are set there are two exhaust passage, and the convenient distributive value in engine is
Tail gas is discharged by another channel when zero.
Binary channels SCR catalytic convention designs provided in an embodiment of the present invention include first exhaust passage 11 and second exhaust is led to
Road 12, the inlet of first exhaust passage 11 are equipped with first butterfly valve 21, and the inlet of second exhaust channel 12 is equipped with second butterfly valve
22, first butterfly valve 21 is communicated to connect with second butterfly valve 22 with the controller of engine, and controller can control first butterfly valve 21
First exhaust passage 11 is opened or closed, controller can control second butterfly valve 22 that second exhaust channel 12 is beaten on or off
It closes.
Secondary noise elimination mechanism 3 is equipped in first exhaust passage 11, noise reduction processing is carried out to the tail gas of process.And work as first row
When gas channel 11 is opened, i.e., tail gas when Engine Injection Mass is zero without binary channels SCR catalytic convention designs 100 carrier
And catalyst, SCR catalytic convention designs are not influenced to NOXTransfer efficiency.When second exhaust channel 12 is opened, engine is normal
Oil spout, carrier and catalyst of the tail gas Jing Guo binary channels SCR catalytic convention designs 100.
The switching of first exhaust passage 11 and second exhaust channel 12 controls 21 He of first butterfly valve by the controller of engine
Second butterfly valve 22 is turned on and off realizing.
Fig. 3 shows the flow chart of the control method of binary channels SCR catalytic convention designs provided in an embodiment of the present invention, should
Control method specifically includes：
First, controller carries out logical operation according to the whole vehicle information and road information of reception, to the operating status of vehicle into
Row judges.
As shown in Fig. 2, can be according to speed information, engine speed information, accelerator pedal position information, gear information
Controller provides vehicle operation information.The road letter that vehicle is run can be provided according to grade information, altitude information by device in order to control
Breath.
Neutral position switch transmits neutral signal to engine controller；Vehicle speed sensor is believed to engine controller transmission speed
Number；Engine speed sensor transmits engine rotational speed signal to engine controller；Accelerator pedal switch is controlled to engine
Device transmits throttle signal；Engine controller controls first butterfly valve 21 and second butterfly valve 22 to perform accordingly after obtaining each signal
Action.
2nd, according to the operating status of vehicle, controller control first butterfly valve 21 and second butterfly valve 22 are operated accordingly,
Switch different exhaust passages, specific control logic is as follows:
(1) if vehicle is in band shelves sliding state, controller control first butterfly valve 21 is opened, and control second butterfly valve 22 is closed
It closes, Vehicular exhaust is made to pass through first exhaust passage 11 and is vented.
In including with shelves sliding state, vehicle is in the state of downhill running to vehicle or vehicle is in and slides over long distances at a high speed
Capable state.
In one embodiment, judge whether vehicle is in down according to speed, engine speed and accelerator pedal position
The state of hill wash row：When speed not less than the first speed setting value and keeps not declining, and start in speed certain time
Machine rotating speed be not less than the first speed setting value, and gas pedal aperture be less than the first aperture setting value when, show that vehicle is in
The state of downhill running；Otherwise, vehicle is not at the state of downhill running.
In another embodiment, judge whether vehicle is in the shape of downhill running according to engine speed and grade signal
State, when engine speed is not less than the second speed setting value, and grade signal source is the slope that descending and gradiometer measure
When spending size not less than gradient setting value, show that vehicle is in the state of downhill running；Otherwise, vehicle is not at downhill running
State.
In one embodiment, judge vehicle whether at a high speed according to speed, engine speed and accelerator pedal position
The state slided over long distances：When speed is not less than the second speed setting value, engine speed is not less than third speed setting value, oil
When door pedal aperture is less than the second aperture setting value, show that vehicle is in the state slided over long distances at a high speed；Otherwise, vehicle is not located
In the state slided over long distances at a high speed.
Setting value numerical value in above-mentioned condition can be demarcated, and whole vehicle information according to different vehicle service conditions
And road information is not limited to above- mentioned information, the present invention does not limit specifically.
(2) if vehicle is not at band shelves sliding state, controller control first butterfly valve 21 is closed, and control second butterfly valve 22 is beaten
It opens, Vehicular exhaust is made to pass through second exhaust channel 12 and is vented.
The present invention is by increasing the exhaust passage of SCR catalytic convention designs and commutation butterfly valve, it is ensured that vehicle lower long slope
Or allow engine exhaust without the carrier and catalyst of SCR catalytic convention designs so as to reduce its temperature when sliding over long distances at a high speed
Drop, so as to which after-treatment system can be made when engine is again introduced into normal operating conditions as soon as possible to NOXAt pollutant
Reason, reduces the discharge of pollutant.
It should be pointed out that in the description of the present invention, term " first ", " second ", " third " are only used for a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any this practical relationship or sequence.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (10)
1. a kind of binary channels SCR catalytic convention designs, which is characterized in that including first exhaust passage and second exhaust channel, institute
The inlet for stating first exhaust passage is equipped with the first reversal valve, and the inlet of the second exhaust channel is equipped with the second reversal valve,
First reversal valve is communicated to connect with second reversal valve with the controller of engine, and the controller can control institute
It states the first reversal valve to open or close the first exhaust passage, the controller can control second reversal valve by institute
Second exhaust channel is stated to open or close.
2. binary channels SCR catalytic convention designs according to claim 1, which is characterized in that further include and be arranged on described
Noise elimination mechanism in one exhaust passage.
3. binary channels SCR catalytic convention designs according to claim 1, which is characterized in that the first exhaust passage is not
By the carrier and catalyst of the binary channels SCR catalytic convention designs, the second exhaust channel passes through the binary channels SCR
The carrier and catalyst of catalytic convention design.
4. binary channels SCR catalytic convention designs according to claim 1, which is characterized in that first reversal valve and institute
It is butterfly valve to state the second reversal valve.
5. a kind of control method of binary channels SCR catalytic convention designs, the control method of the binary channels SCR catalytic convention designs
Binary channels SCR catalytic convention designs according to any one of claim 1 to 4 are implemented, which is characterized in that packet
It includes：
S1：Controller carries out logical operation according to the whole vehicle information and road information of reception, and the operating status of vehicle is sentenced
It is disconnected.
S2：According to the operating status of vehicle, controller controls described in first reversal valve or the second commutation Vavle switching the
One exhaust passage or the second exhaust channel are exhausted.
6. the control method of binary channels SCR catalytic convention designs according to claim 5, which is characterized in that S2 step packets
It includes：
If vehicle is in band shelves sliding state, controller controls first reversal valve to open, second reversal valve is controlled to close
It closes, Vehicular exhaust is made to be vented by the first exhaust passage；
If vehicle is not at band shelves sliding state, controller controls first reversal valve to close, control second reversal valve
It opens, Vehicular exhaust is made to pass through the second exhaust channel vent.
7. the control method of binary channels SCR catalytic convention designs according to claim 6, which is characterized in that the vehicle
In the state for being in the state of downhill running including vehicle with shelves sliding state or vehicle slides over long distances in high speed.
8. the control method of binary channels SCR catalytic convention designs according to claim 7, which is characterized in that the vehicle
The Rule of judgment of state in downhill running is：Speed is not less than the first speed setting value and keeps one timing of speed
Interior not decline, engine speed is not less than the first speed setting value, and gas pedal aperture is less than the first aperture setting value.
9. the control method of binary channels SCR catalytic convention designs according to claim 8, which is characterized in that the vehicle
The Rule of judgment of state in downhill running is：The engine speed is not less than the second speed setting value, and grade signal is
Descending and gradient size are not less than gradient setting value.
10. the control method of binary channels SCR catalytic convention designs according to claim 9, which is characterized in that the high speed
The Rule of judgment of state that slides over long distances is：The speed is not less than the second speed setting value, and the engine speed is not low
In third speed setting value, the gas pedal aperture is less than the second aperture setting value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445875.2A CN108150296A (en) | 2017-12-27 | 2017-12-27 | Binary channels SCR catalytic convention designs and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445875.2A CN108150296A (en) | 2017-12-27 | 2017-12-27 | Binary channels SCR catalytic convention designs and its control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108150296A true CN108150296A (en) | 2018-06-12 |
Family
ID=62463424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711445875.2A Pending CN108150296A (en) | 2017-12-27 | 2017-12-27 | Binary channels SCR catalytic convention designs and its control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608286A (en) * | 2019-09-30 | 2019-12-24 | 潍柴动力股份有限公司 | Vehicle gear shifting control method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101169060A (en) * | 2006-10-27 | 2008-04-30 | 日产自动车株式会社 | Exhaust cleaning device and catalyst regeneration control method for the same |
| CN102562233A (en) * | 2010-12-24 | 2012-07-11 | 广西玉柴机器股份有限公司 | Engine waste gas aftertreatment system |
| CN203925755U (en) * | 2014-01-13 | 2014-11-05 | 东风汽车公司 | A kind of for the throttled-wide exhaust structure of hybrid vehicle |
| JP2016169650A (en) * | 2015-03-12 | 2016-09-23 | マツダ株式会社 | Control device for engine |
| CN207554162U (en) * | 2017-10-31 | 2018-06-29 | 潍柴动力股份有限公司 | A kind of vehicle maintenance service system |
-
2017
- 2017-12-27 CN CN201711445875.2A patent/CN108150296A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101169060A (en) * | 2006-10-27 | 2008-04-30 | 日产自动车株式会社 | Exhaust cleaning device and catalyst regeneration control method for the same |
| CN102562233A (en) * | 2010-12-24 | 2012-07-11 | 广西玉柴机器股份有限公司 | Engine waste gas aftertreatment system |
| CN203925755U (en) * | 2014-01-13 | 2014-11-05 | 东风汽车公司 | A kind of for the throttled-wide exhaust structure of hybrid vehicle |
| JP2016169650A (en) * | 2015-03-12 | 2016-09-23 | マツダ株式会社 | Control device for engine |
| CN207554162U (en) * | 2017-10-31 | 2018-06-29 | 潍柴动力股份有限公司 | A kind of vehicle maintenance service system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608286A (en) * | 2019-09-30 | 2019-12-24 | 潍柴动力股份有限公司 | Vehicle gear shifting control method and device |
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