CN206592181U - Device for improving exhaust temperature of diesel engine - Google Patents
Device for improving exhaust temperature of diesel engine Download PDFInfo
- Publication number
- CN206592181U CN206592181U CN201720092075.6U CN201720092075U CN206592181U CN 206592181 U CN206592181 U CN 206592181U CN 201720092075 U CN201720092075 U CN 201720092075U CN 206592181 U CN206592181 U CN 206592181U
- Authority
- CN
- China
- Prior art keywords
- exhaust gas
- scr catalyst
- engine
- turbocharger
- gas bypass
- 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.)
- Active
Links
- 239000003054 catalyst Substances 0.000 claims abstract description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002912 waste gas Substances 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 36
- 230000004087 circulation Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 206010044565 Tremor Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
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
- 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
-
- 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
- Y02T10/40—Engine management systems
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The device for improving the exhaust temperature of the diesel engine comprises an engine, a turbocharger and a waste gas bypass pipeline with a waste gas bypass valve, wherein an air inlet throttle valve is arranged on an air inlet main pipe of the engine, an air outlet end of the engine is communicated with an air inlet end of the turbocharger through a first exhaust pipe, an air outlet end of the turbocharger is communicated with an air inlet end of an SCR catalyst through a second exhaust pipe, the waste gas bypass pipeline is connected with the turbocharger in parallel, the air inlet end of the waste gas bypass pipeline is communicated with the first exhaust pipe, the air outlet end of the waste gas bypass pipeline is communicated with the second exhaust pipe, a temperature sensor is arranged at the SCR catalyst, and the air inlet throttle valve, the waste gas bypass valve and the temperature sensor are in signal. The design can effectively improve the exhaust temperature of the engine under the low-load working condition, and the SCR catalyst is ensured to have high-efficiency conversion efficiency under all working conditions.
Description
Technical field
The utility model belongs to automobile engine post-processing technology field, and in particular to one kind improves diesel exhaust gas temperature
Device, it is adaptable to improve the control accuracy and stability of device.
Background technology
With the gradually increase of car ownership, vehicle exhaust is increasing to the degree of atmosphere environment impact, for reduction
The environmental of vehicle exhaust, automobile emission regulation constantly upgrading adds tight.It will be used in following Abgasgesetz of state six
The ESC/ETC Emission test cycles of WHSC/WHTC Emission test cycles surrogate four/five, new Abgasgesetz not only discharges limit
Value adds sternly, and state of cyclic operation is also changed.Compared with ESC is circulated, the operating mode of WHSC circulations is close to low-speed low-load region,
And WHTC circulations are then divided to hot and cold two kinds of test cycles, the delivery temperature that the change of test loop causes state six to be circulated is reduced, and bavin
The transformation efficiency of SCR catalyst is very sensitive to temperature in oil machine SCR aftertreatment system, and low exhaust temperature can cause SCR conversion effects
Rate declines, therefore, to reach the harsh NOx emission limit value requirement of state six, need to ensure SCR aftertreatment system in low- load conditions
Transformation efficiency, therefore improve diesel engine running on the lower load under delivery temperature it is significant.
Chinese patent：Application publication number is CN104775881A, and data of publication of application is the patent of invention on July 15th, 2015
Disclose a kind of engine SCR catalyst system, the system is additionally arranged intake-air throttle valve on engine charge pipeline, and
The entrance front end of SCR catalyst one section of bypass line in parallel, and in bypass line entrance one Bidirectional bypass valve is installed, to control
The different circulation paths of engine exhaust processed.Although the structure can reduce SCR catalyst thermal loss to greatest extent, improve
Or the temperature of SCR catalyst is kept, the conversion efficiency of SCR catalyst is lifted, but it uses opened loop control, does not simply fail to basis
The temperature requirements of SCR catalyst realize the accurate control to intake-air throttle valve and bypass valve opening, and may also occur because
Caused by engine breathing fluctuation unstable situation is operated under engine idling or running on the lower load.
The content of the invention
The purpose of this utility model be overcome prior art exist can not accurately control the temperature and hair of SCR catalyst
The problem of motivation operates unstable under idling or running on the lower load can effectively improve the row under running on the lower load there is provided a kind of
The device of temperature degree.
To realize object above, the technical solution of the utility model is as follows：
A kind of device for improving diesel exhaust gas temperature, including engine, turbocharger, giving up with exhaust gas by-pass valve
Intake-air throttle valve is provided with gas bypass line, the inlet manifold of the engine, the exhaust end of engine passes through an exhaust
Pipe is communicated with the inlet end of turbocharger, the air inlet that the exhaust end of turbocharger passes through No. two blast pipes and SCR catalyst
End is communicated, and temperature sensor is provided with SCR catalyst；
The exhaust gas bypass pipeline is arranged in parallel with turbocharger, the inlet end of exhaust gas bypass pipeline and a blast pipe
Communicate, the exhaust end of exhaust gas bypass pipeline is communicated with No. two blast pipes, and intake-air throttle valve, exhaust gas by-pass valve, temperature sensor
It is connected with ECU signal.
The intake-air throttle valve is located between the exhaust end of charge air cooler and the inlet end of engine.
The SCR catalyst is vanadium base SCR catalyst, copper-based SCR catalyst or copper and iron composite base SCR catalyst.
Compared with prior art, the beneficial effects of the utility model are：
1st, exhaust gas bypass pipeline and turbocharger be simultaneously in a kind of device for improving diesel exhaust gas temperature of the utility model
Connection is set, and its inlet end is communicated with a blast pipe, and exhaust end is communicated with No. two blast pipes, and intake-air throttle valve, exhaust gas bypass
Valve, temperature sensor are connected with ECU signal, during operation, and ECU is by the observed temperature of temperature sensor and setting
Outlet air temperature be compared, if delivery temperature of the observed temperature higher than setting, ECU will control nearly gas choke valve complete
Open, and exhaust gas by-pass valve is fully closed, if observed temperature, less than the delivery temperature of setting, ECU is then according to their mathematic interpolation
The aperture of intake-air throttle valve and exhaust gas by-pass valve, so that intake-air throttle valve and the aperture size of exhaust gas by-pass valve are controlled to adjust, it is real
Effective lifting of delivery temperature under existing running on the lower load, the design controls air inlet restriction for the temperature requirements of SCR catalyst
The aperture of valve and by-passing valve, is not only controlled accurately, and be not in that engine operates shakiness under idling or running on the lower load
The problem of determining, device has good stability.Therefore, the utility model is not only controlled accurately, and is had good stability.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure：Engine 1, inlet manifold 11, blast pipe 12, No. two blast pipes 13, turbocharger 2, enter moral
Flow valve 3, exhaust gas bypass pipeline 4, exhaust gas by-pass valve 41, temperature sensor 5, SCR catalyst 6, charge air cooler 7, ECU 8.
Embodiment
Explanation and embodiment are described in further detail to the utility model below in conjunction with the accompanying drawings.
Referring to Fig. 1, a kind of device of raising diesel exhaust gas temperature, including engine 1, turbocharger 2, with waste gas
Intake-air throttle valve 3 is provided with the exhaust gas bypass pipeline 4 of by-passing valve 41, the inlet manifold 11 of the engine 1, engine 1
Exhaust end is communicated by a blast pipe 12 with the inlet end of turbocharger 1, and the exhaust end of turbocharger 1 passes through No. two rows
Tracheae 13 is communicated with the inlet end of SCR catalyst 6, and temperature sensor 5 is provided with SCR catalyst 6；
The exhaust gas bypass pipeline 4 is arranged in parallel with turbocharger 2, the inlet end of exhaust gas bypass pipeline 4 and a row
Tracheae 12 is communicated, and the exhaust end of exhaust gas bypass pipeline 4 is communicated with No. two blast pipes 13, and intake-air throttle valve 3, exhaust gas by-pass valve
41st, temperature sensor 5 is connected with the signal of ECU 8.
The intake-air throttle valve 3 is located between the exhaust end of charge air cooler 7 and the inlet end of engine 1.
The SCR catalyst 6 is vanadium base SCR catalyst, copper-based SCR catalyst or copper and iron composite base SCR catalyst.
Principle of the present utility model is described as follows：
ECU 8 described in the utility model is adjusted using default delivery temperature as desired value and controls intake-air throttle valve 3
With the aperture of exhaust gas by-pass valve 4, the delivery temperature under diesel engine running on the lower load can be effectively improved, it is ensured that SCR aftertreatment system
Transformation efficiency.Its concrete operating principle is as follows：
The delivery temperature of actual measurement is fed back to ECU 8 by temperature sensor 5, ECU 8 again by the observed temperature with
Default delivery temperature is compared, if observed temperature is higher than the delivery temperature of setting, ECU 8 will be directly sent into moral
The fully closed instruction of valve 3 standard-sized sheet, exhaust gas by-pass valve 41 is flowed, if delivery temperature of the observed temperature less than setting, the then basis of ECU 8
Their mathematic interpolation intake-air throttle valve 3 and the aperture of exhaust gas by-pass valve 41, then according to intake-air throttle valve 3 and exhaust gas by-pass valve
The real-time opening value regulation intake-air throttle valve 3 and the aperture of exhaust gas by-pass valve 41 of 41 feedbacks.
The delivery temperature that temperature sensor 5 described in the utility model is measured is the porch of SCR catalyst 6 and SCR catalyst 6
The temperature averages in exit.
Embodiment 1：
Referring to Fig. 1, a kind of device of raising diesel exhaust gas temperature, including engine 1, turbocharger 2, with waste gas
The exhaust gas bypass pipeline 4 of by-passing valve 41, be provided between the inlet manifold 11 of the engine 1 and the exhaust end of charge air cooler 7 into
Gas choke valve 3, the exhaust end of engine 1 is communicated by a blast pipe 12 with the inlet end of turbocharger 1, turbocharger
1 exhaust end is communicated by No. two blast pipes 13 with the inlet end of SCR catalyst 6, the exhaust gas bypass pipeline 4 and turbocharging
Device 2 is arranged in parallel, and the inlet end of exhaust gas bypass pipeline 4 is communicated with a blast pipe 12, the exhaust end of exhaust gas bypass pipeline 4 and two
Number blast pipe 13 is communicated, and the SCR catalyst 6 is vanadium base SCR catalyst, copper-based SCR catalyst or copper and iron composite base SCR catalysis
Device, is provided with temperature sensor 5, and intake-air throttle valve 3, exhaust gas by-pass valve 41, temperature sensor 5 with ECU 8
Signal is connected.
Claims (3)
1. a kind of device for improving diesel exhaust gas temperature, including engine（1）, turbocharger（2）, with exhaust gas by-pass valve
（41）Exhaust gas bypass pipeline（4）, the engine（1）Inlet manifold（11）On be provided with intake-air throttle valve（3）, engine
（1）Exhaust end pass through a blast pipe（12）With turbocharger（2）Inlet end communicate, turbocharger（2）Exhaust
End passes through No. two blast pipes（13）With SCR catalyst（6）Inlet end communicate, and SCR catalyst（6）Place is provided with TEMP
Device（5）, it is characterised in that：
The exhaust gas bypass pipeline（4）With turbocharger（2）It is arranged in parallel, exhaust gas bypass pipeline（4）Inlet end and No. one
Blast pipe（12）Communicate, exhaust gas bypass pipeline（4）Exhaust end and No. two blast pipes（13）Communicate, and intake-air throttle valve（3）, it is useless
Gas by-passing valve（41）, temperature sensor（5）And ECU（8）Signal is connected.
2. a kind of device for improving diesel exhaust gas temperature according to claim 1, it is characterised in that：The air inlet restriction
Valve（3）Positioned at charge air cooler（7）Exhaust end and engine（1）Inlet end between.
3. a kind of device for improving diesel exhaust gas temperature according to claim 1 or 2, it is characterised in that：The SCR is urged
Change device（6）For vanadium base SCR catalyst, copper-based SCR catalyst or copper and iron composite base SCR catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720092075.6U CN206592181U (en) | 2017-01-22 | 2017-01-22 | Device for improving exhaust temperature of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720092075.6U CN206592181U (en) | 2017-01-22 | 2017-01-22 | Device for improving exhaust temperature of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206592181U true CN206592181U (en) | 2017-10-27 |
Family
ID=60128137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720092075.6U Active CN206592181U (en) | 2017-01-22 | 2017-01-22 | Device for improving exhaust temperature of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206592181U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559075A (en) * | 2017-10-31 | 2018-01-09 | 潍柴动力股份有限公司 | A kind of vehicle maintenance service system and method |
| CN110925061A (en) * | 2019-11-29 | 2020-03-27 | 安徽江淮汽车集团股份有限公司 | Engine exhaust temperature lifting device and engine exhaust temperature control method |
| CN114810384A (en) * | 2022-05-10 | 2022-07-29 | 潍柴动力股份有限公司 | Method and apparatus for controlling aftertreatment inlet temperature |
-
2017
- 2017-01-22 CN CN201720092075.6U patent/CN206592181U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559075A (en) * | 2017-10-31 | 2018-01-09 | 潍柴动力股份有限公司 | A kind of vehicle maintenance service system and method |
| CN110925061A (en) * | 2019-11-29 | 2020-03-27 | 安徽江淮汽车集团股份有限公司 | Engine exhaust temperature lifting device and engine exhaust temperature control method |
| CN110925061B (en) * | 2019-11-29 | 2021-04-16 | 安徽江淮汽车集团股份有限公司 | Engine exhaust temperature lifting device and engine exhaust temperature control method |
| CN114810384A (en) * | 2022-05-10 | 2022-07-29 | 潍柴动力股份有限公司 | Method and apparatus for controlling aftertreatment inlet temperature |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |