CN205744071U - A kind of engine exhaust system of electrified heating device - Google Patents
A kind of engine exhaust system of electrified heating device Download PDFInfo
- Publication number
- CN205744071U CN205744071U CN201620438898.5U CN201620438898U CN205744071U CN 205744071 U CN205744071 U CN 205744071U CN 201620438898 U CN201620438898 U CN 201620438898U CN 205744071 U CN205744071 U CN 205744071U
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- Prior art keywords
- relay
- electric heater
- engine ecu
- heating device
- engine
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- 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
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- 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
Abstract
A kind of engine exhaust system of electrified heating device, including electric heater (3) and relay (8), electric heater (3) is arranged in exhaustor (2), relay (8) is connected with alternator for vehicle (1) and electric heater (3) respectively, the control end of relay (8) is connected with Engine ECU (10) by control circuit (9), Engine ECU (10) respectively with carbamide spraying fire cells D CU(11) and SCR postprocessor (6) in exhaust gas temperature sensor (5) be connected, carbamide spraying fire cells D CU(11) it is connected with urea nozzle (4).Engine ECU (10) is by controlling the break-make of relay (8) and then controlling the break-make of electric heater (3), thus realizes heating aerofluxus, improves the transformation efficiency of SCR postprocessor (6), reduces vehicle in city worst cold case NOx emission.
Description
Technical field
This utility model relates to a kind of engine exhaust system, more specifically to the electromotor of a kind of electrified heating device
Gas extraction system.
Background technology
From the beginning of meeting state four Abgasgesetz, diesel engine begins with post-processing technology, mainly SCR post-processing technology,
It uses SCR technology to reduce the NOx emission of electromotor.The initiation temperature of existing SCR postprocessor is general
At 200-220 DEG C, reach this temperature and could start to spray carbamide and carry out reduction reaction；During less than this delivery temperature, SCR
Preprocessor is unable to reach initiation temperature, sprays almost without carbamide.
Commercial car, being main with city operating mode when, mostly is the slow-speed of revolution, underrun, owing to there is no reduction reaction,
The discharge of NOx is the highest, it is impossible to reach the WHTC requirement to emission control.Existing mainly take two kinds of measures: one, promote
The low temperature conversion ability of SCR postprocessor；But this kind of technology is the most immature, and high cost makes it difficult to the marketization.Two, use
The method of exhaustor parcel insulation, wraps up adiabator at exhaustor outer surface, makes the temperature of SCR postprocessor entrance to carry
Rise about 20 DEG C, reach the requirement of initiation temperature；But this method cost is high, maintaining is complicated, when summer temperature is higher
Wait heat radiation bad, have the risk making SCR postprocessor overheating failure.
Summary of the invention
This utility model is unable to reach initiation temperature for existing SCR postprocessor and sprays almost without carbamide when low temperature
The problems such as the NOx emission penetrating, cannot reducing electromotor, it is provided that the engine exhaust system of a kind of electrified heating device.
For achieving the above object, technical solution of the present utility model is: the engine exhaust of a kind of electrified heating device
System, including electric heater and relay, described electric heater is arranged in exhaustor, the input of described relay and car
Being connected by heater circuit with electromotor, the outfan of relay is connected with electric heater, and the control end of relay passes through
Control circuit is connected with Engine ECU, described Engine ECU respectively with carbamide spraying fire cells D CU and SCR post processing
Exhaust gas temperature sensor in device is connected, and described carbamide spraying fire cells D CU is connected with the urea nozzle in exhaustor
Connect.
Described electric heater is positioned at before urea nozzle at 100-150mm in exhaustor.
Compared with prior art, the beneficial effects of the utility model are:
This utility model repeat circuit is connected by heater circuit with alternator for vehicle, and relay is connected with electric heater
Connecing, the control end of relay is connected with Engine ECU by control circuit, Engine ECU respectively with carbamide spraying fire list
Unit DCU is connected with the exhaust gas temperature sensor in SCR postprocessor, carbamide spraying fire cells D CU and the urine in exhaustor
Element nozzle is connected.During work, the exhaust gas temperature sensor monitor engines in real time delivery temperature of SCR post processing entrance, and will
Signal feeds back to Engine ECU, and temperature is judged by Engine ECU, and by controlling the break-make of relay and then controlling electricity
The break-make of heater, thus realize aerofluxus is heated, flow through the delivery temperature of SCR postprocessor, meet or exceed SCR
The initiation temperature of preprocessor, improves the transformation efficiency of SCR postprocessor, reduces vehicle and arranges at city worst cold case NOx
Put.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation.
Accompanying drawing illustrates, alternator for vehicle 1, exhaustor 2, electric heater 3, urea nozzle 4, exhaust gas temperature sensor 5, SCR
Preprocessor 6, heater circuit 7, relay 8, control circuit 9, Engine ECU 10, carbamide spraying fire cells D CU11.
Detailed description of the invention
Illustrate with detailed description of the invention, this utility model to be described in further detail below in conjunction with accompanying drawing.
See Fig. 1, the engine exhaust system of a kind of electrified heating device, it is adaptable to the aerofluxus of SCR diesel engine WHTC operating mode
The lifting of temperature, including electric heater 3 and relay 8.Described electric heater 3 is arranged in exhaustor 2, electric heater 3 liang
Holding and sealed by resistant to elevated temperatures ceramic seal pad, it is high temperature resistant, power selection 3kW.The input of described relay 8 with automobile-used
Motor 1 is connected by heater circuit 7, and the outfan of relay 8 is connected with electric heater 3；The control end of relay 8 passes through
Control circuit 9 is connected with Engine ECU 10, described Engine ECU 10 respectively with carbamide spraying fire cells D CU11 and
Exhaust gas temperature sensor 5 in SCR postprocessor 6 is connected.In described carbamide spraying fire cells D CU11 and exhaustor 2
Urea nozzle 4 be connected.
Seeing Fig. 1, concrete, described electric heater 3 is positioned at before urea nozzle 4 at 100-150mm in exhaustor 2.
See Fig. 1, during work, use alternator for vehicle 1 to power, sense according to SCR postprocessor 6 porch delivery temperature
The monitor signals in real time of device 5, it is judged that whether electromotor is in low row's temperature operating mode, then controls opening of electric heater 3 by relay 8
Opening and close, thus heat aerofluxus, the delivery temperature flowing through SCR postprocessor 6 promotes 20 DEG C, meets or exceeds
The initiation temperature of SCR postprocessor 6, improves the transformation efficiency of SCR postprocessor 6, reduces NOx emission.Detailed process is such as
Under:
When Engine ECU 10 detects that electromotor is in normal operation and exhaust gas temperature sensor 5 detects aerofluxus
When temperature is less than 190 DEG C, then Engine ECU 10 judges that now adding thermorelay 8 as low row's temperature operating mode control closes, and connection adds
Heater circuit 7, electromotor 1 powers to electric heater 3, and electric heater 3 is started working, and makes exhaust-gas temperature rising 20 DEG C and keeps heating, from
And make delivery temperature maintain and be not less than 210 DEG C, now reach initiation temperature；Now carbamide spraying fire cells D CU11 controls urine
Element nozzle 4 starts injection, thus reduces the NOx emission of worst cold case.
When exhaust gas temperature sensor 5 detects delivery temperature higher than 260 DEG C and when being persistently not less than 5min, Engine ECU 10
Judging that now electromotor departs from worst cold case, Engine ECU 10 also controls relay 8 and disconnects heater circuit 7, stops heating.
Below as a example by certain 5L Diesel engine and certain 11L large diesel engine:
Certain 5L Diesel engine: maximum extraction flow G during low speed 1000r/minAerofluxus=0.0691kg/s, determining of aerofluxus
Pressure ratio thermal capacitance CpAerofluxus=1.0992kJ/ (kg DEG C), then needed for making its temperature promote 20 DEG C, the peak power of heater is: 20 DEG C
× 0.0691kg/s × 1.0992kJ/ (kg DEG C)=1.52kW, then row's electric heater 3 may select the ptc heater of 1.6kW.
Certain 11L large diesel engine: low regime needs the maximum extraction flow G of heating cycleAerofluxus=0.1562kg/s, aerofluxus
Specific heat at constant pressure CpAerofluxus=1.0992kJ/ (kg DEG C), then needed for making its temperature promote 20 DEG C, the peak power of heater is: 20
DEG C × 0.1562kg/s × 1.0992kJ/ (kg DEG C)=3.43kW, then electric heater 3 may select the ptc heater of 3.6kW.
Above content is to combine concrete preferred implementation further detailed description of the utility model, it is impossible to
Assert that of the present utility model being embodied as is confined to these explanations.Ordinary skill for this utility model art
For personnel, without departing from the concept of the premise utility, it is also possible to make some simple deduction or replace, said structure
All should be considered as belonging to protection domain of the present utility model.
Claims (2)
1. the engine exhaust system of an electrified heating device, it is characterised in that: include electric heater (3) and relay (8), institute
The electric heater (3) stated is arranged in exhaustor (2), and the input of described relay (8) and alternator for vehicle (1) are by heating
Circuit (7) is connected, and the outfan of relay (8) is connected with electric heater (3), and the control end of relay (8) is by controlling
Circuit (9) is connected with Engine ECU (10), described Engine ECU (10) respectively with carbamide spraying fire cells D CU(11)
It is connected with the exhaust gas temperature sensor (5) in SCR postprocessor (6), described carbamide spraying fire cells D CU(11) and row
Urea nozzle (4) in trachea (2) is connected.
The engine exhaust system of a kind of electrified heating device the most according to claim 1, it is characterised in that: described electricity adds
Hot device (3) is positioned at urea nozzle (4) front 100-150mm in exhaustor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620438898.5U CN205744071U (en) | 2016-05-14 | 2016-05-14 | A kind of engine exhaust system of electrified heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620438898.5U CN205744071U (en) | 2016-05-14 | 2016-05-14 | A kind of engine exhaust system of electrified heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205744071U true CN205744071U (en) | 2016-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620438898.5U Active CN205744071U (en) | 2016-05-14 | 2016-05-14 | A kind of engine exhaust system of electrified heating device |
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| CN (1) | CN205744071U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108729990A (en) * | 2017-04-20 | 2018-11-02 | 北华航天工业学院 | A kind of diesel engine after treatment heating and mixing device of anti-urea crystals |
| CN110199094A (en) * | 2016-12-19 | 2019-09-03 | 庄信万丰股份有限公司 | NO is improved by introducing ozonexConversion ratio |
| CN112746907A (en) * | 2020-08-05 | 2021-05-04 | 东风汽车集团有限公司 | GPF city working condition active regeneration grading control method and system |
-
2016
- 2016-05-14 CN CN201620438898.5U patent/CN205744071U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110199094A (en) * | 2016-12-19 | 2019-09-03 | 庄信万丰股份有限公司 | NO is improved by introducing ozonexConversion ratio |
| CN108729990A (en) * | 2017-04-20 | 2018-11-02 | 北华航天工业学院 | A kind of diesel engine after treatment heating and mixing device of anti-urea crystals |
| CN112746907A (en) * | 2020-08-05 | 2021-05-04 | 东风汽车集团有限公司 | GPF city working condition active regeneration grading control method and system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |