CN106089370A - The assisted heating device of automotive SCR system and heating means - Google Patents
The assisted heating device of automotive SCR system and heating means Download PDFInfo
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- CN106089370A CN106089370A CN201610630517.8A CN201610630517A CN106089370A CN 106089370 A CN106089370 A CN 106089370A CN 201610630517 A CN201610630517 A CN 201610630517A CN 106089370 A CN106089370 A CN 106089370A
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- temperature
- scr system
- gas
- proportional solenoid
- liquefied gas
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- 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]
- F01N3/2073—Selective catalytic reduction [SCR] with means for generating a reducing substance from the exhaust gases
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- 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
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
-
- 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]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses a kind of assisted heating device for automotive SCR system and heating means, device includes: tail gas and high-temperature gas mixing arrangement, signal acquiring system, controller, ignition module, liquefied gas burner, burner fuel feed system, proportional solenoid, lighter etc..Heating means include: the signal gathered by signal acquiring system, controller is to whether aid system heating judges, when needs heat, proportional solenoid is opened, liquefied gas, air and diesel exhaust enter burner and mix, and form the gas of high temperature through igniter fire after-combustion, and high-temperature gas enters exhaustor by mixing arrangement and mixes with diesel engine vent gas, reach to promote the purpose of exhaust temperature, finally promote SCR system temperature.The present invention is by heating, and solution SCR system transformation efficiency when diesel engine vent gas is in low temperature is low occurs, in exhaustor, the problem that deposit occurs blocking.
Description
Technical field
The present invention relates to the discharged nitrous oxides control field of electromotor, particularly to the auxiliary of a kind of automotive SCR system
Heater and heating means.
Background technology
Automobile-used SCR (Selective Catalytic Reduction, selective catalysis reduces) technology, in catalyst carrier
On, utilize the NH after urea pyrolysis3As reduzate, by NOXIt is reduced to N2And H2O, reduces NO in tail gas with thisXDischarge.
Under this technology, NH3Can preferentially reduce NOX, and not with the O in tail gas2Reaction, therefore it is referred to as " SCR technology ".
In real engine running, numerous influence factor exists for SCR system catalytic conversion efficiency: temperature,
Flow velocity, NO2Concentration, sulfide growing amount in moisture and tail gas in tail gas.Wherein temperature is topmost influence factor,
First, in SCR system running, along with the rising catalyst temperature of engine exhaust temperature also increases, NH3To NOX
Catalyzed conversion activity be gradually increased, when temperature reaches 350 DEG C, transformation efficiency reaches peak value, and in 350～450 DEG C,
Catalyst converter transformation efficiency all maintains higher level.Secondly, during urea pyrolysis, it is accompanied by multiple side reaction occurs,
Easily generating biuret, cyanuric acid, ammelide, even more complicated polymer, these by-products are the most not
Easily decompose, ultimately form deposit, block exhaustor.
When cold boot of diesel, underload, engine exhaust temperature is low, just can make catalysis with the longest heat time heating time
Device reaches preferable transformation efficiency, particularly northern China, and winter temperature is cold, the NO of SCR systemXSensor, temperature sensor
The preheating time of 10～20 minutes is needed, during diesel engine vent gas is directly discharged to air in the meantime Deng parts.Meanwhile, exist
Under engine low load operating mode, the highest rotating speed underload situation, the extraction flow of electromotor is big, and delivery temperature generally exists
Between 100～300 DEG C, now catalyst converter is in low temperature state, and too high extraction flow further reduces catalyst converter and tail gas
Time of contact, this time NH3To NOXCatalytic conversion efficiency only have 10～40%.
The low temperature of aerofluxus will also result in a large amount of deposit buildup exhaustor inner wall temperature lower in urea nozzle downstream,
If run in this operating mode for a long time, inherently causing exhaustor to block, the increase of exhaust back pressure both have impact on turning of catalyst
Change efficiency and have impact on again electromotor economic performance.Studies have found that, the polymer that urea pyrolysis causes, the temperature of 350～450 DEG C
To decompose in a large number under the conditions of degree, resolution ratio can reach 95%.
Summary of the invention
The technical problem to be solved is to provide assisted heating device and the heating side of a kind of automotive SCR system
Method, by heating, solution SCR system transformation efficiency when diesel engine vent gas is in low temperature is low occurs that deposit is sent out in exhaustor
The problem of raw blocking.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
The assisted heating device of a kind of automotive SCR system, air compressor is connected to burning by the first proportional solenoid
The air intake of device, exhaust gas turbine inlet end is connected to exhaust gas entrance, exhaust gas turbine outlet side by the 3rd proportional solenoid
Being connected to mixing arrangement exhaust gas entrance, the liquefied gas that liquefied gas input port is connected to burner by the second proportional solenoid enters
Mouthful；
Outside diversion rod, it is disposed with air chamber, liquefaction air cavity, waste gas chamber, described liquefaction the most from the inside to the outside
Having liquefied gas nozzle on air cavity, described liquefied gas nozzle stretches into air chamber, and air chamber, liquefaction air cavity and waste gas chamber are compiled in burning
Room, described combustor is fixed with lighter；
The upper interface of mixing arrangement connects burner, is provided with mixing arrangement combustion gas chamber in described mixing arrangement, described mixed
Locking device combustion gas intracavity passes a flue gas leading, and described flue gas leading one end is mixing arrangement exhaust gas entrance, and the other end is mixing dress
Putting outlet, flue gas leading is aditus laryngis at mixing arrangement combustion gas intracavity, and described aditus laryngis has mix aperture；
It is provided with ignition module, the start and stop of described ignition module control point firearm.
According to such scheme, between described liquefied gas input port and liquefied gas entrance, also it is in series with manostat.
According to such scheme, between described liquefied gas input port and liquefied gas entrance, also it is in series with pressure regulator valve.
According to such scheme, between described liquefied gas input port and liquefied gas entrance, also it is in series with filter.
According to such scheme, between described liquefied gas input port and liquefied gas entrance, also it is in series with relief valve.
According to such scheme, the outlet of described mixing arrangement is connected to SCR system.
According to such scheme, described mixing arrangement is provided with the second temperature sensing, between mixing arrangement and SCR system
Being provided with the second temperature and pressure sensing and the first temperature sensing on pipeline, described SCR system outlet side is provided with the first temperature and pressure sensing.
According to such scheme, be additionally provided with controller, described controller control respectively and connect the second proportional solenoid,
One proportional solenoid, the 3rd proportional solenoid, ignition module, the second temperature sensing, the first temperature sensing, second temperature and pressure sensing with
And first temperature and pressure sensing.
According to such scheme, described controller is by signal processing module, ignition signal module, solenoid valve driving module, report
Alert device and ECU (Electronic Control Unit, electronic control unit) composition；Described signal processing module, processes in real time
Temperature sensor and the signal of pressure transducer, and transmit a signal to ECU；Described solenoid valve driving module, by pulse electricity
Pressure signal realizes the unlatching to each proportional solenoid, closes and rise process control；Described ignition signal module, gives described igniting
Module one triggers signal；Described alarm, after receiving ECU alarm signal, reports to the police with blinking red lamp.
The auxiliary heating means of a kind of automotive SCR system, comprise the following steps:
After diesel engine igniting, ECU judges according to SCR system real-time status parameter, and wherein system temperature threshold values is 400
DEG C, before and after SCR system, pressure reduction threshold values is 2kpa, when temperature less than 400 DEG C or pressure reduction more than 2kpa time, controller is to igniting mould
Block, each proportional solenoid send and trigger signal；
Each proportional solenoid is opened, lighter starts igniting, and ECU starts timing 30s, and ECU is by being positioned at combustor
Second temperature sensing judges the most whether normal ignition；
When burner normal ignition, halt is fought and each proportional solenoid aperture is adjusted in real time according to temperature rise situation
Joint；After SCR system temperature reaches 500 DEG C, controller controls burner and quits work, and closes each proportional solenoid；
When burner igniting is abnormal, controller successively controls the second proportional solenoid aperture of liquefied gas and raises,
Air gas circuit, the proportional solenoid aperture of diesel engine vent gas gas circuit reduce, and readjust mixture strength, and again light a fire；Again
Being reduced by the second proportional solenoid aperture, air gas circuit, the proportional solenoid of diesel engine vent gas gas circuit raise, and readjust mixed
Close gas concentration, and again light a fire；
When all fail for twice normal ignition time, in controller, alarm blinking red lamp is reported to the police, and controls each ratio electromagnetism
Valve cuts out.
Compared with prior art, the invention has the beneficial effects as follows:
1) existing SCR system of diesel engine structure need not be changed, on the premise of improving its catalytic efficiency, it is achieved well
Compatible.
2) gas burner, this kind of burner NO are usedXDischarge, CH and granular material discharged the lowest, the fire of fuel gas buring
Flame can realize again the second-time burning of tail gas, the discharge of the soot of Optimization of Diesel Engine and the discharge of CH, CO.
3) parts convenient disassembly is prone on car load install.
4) mode of directly burning is used to heat, it is achieved to respond the rapid efficiency of heating surface high.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the assisted heating device of automotive SCR system in the present invention.
Fig. 2 is burner structural representation in the present invention.
Fig. 3 is mixing arrangement structural representation in the present invention.
Fig. 4 is the auxiliary heating means schematic flow sheet of automotive SCR system in the present invention.
In figure: 1-air compressor；2-the first proportional solenoid；3-the second proportional solenoid；4-manostat；5-pressure regulation
Valve；6-filter；7-relief valve；8-ignition module；9-controller；10-the first temperature and pressure sense；11-SCR system；12-the second temperature
Pressure sensing；13-the first temperature sensing；14-the second temperature sensing；15-mixing arrangement；16-burner；17-the 3rd ratio electricity
Magnet valve；18-exhaust gas turbine；19-liquefied gas entrance；20-liquefies air cavity；21-liquefied gas nozzle；22-diversion rod；23-lighter；
24-combustor；25-waste gas chamber；26-air chamber；27-exhaust gas entrance；28-air intake；29-mixing arrangement exhaust gas entrance；30-
Mixing arrangement combustion gas chamber；The upper interface of 31-；32-aditus laryngis；33-mix aperture；34-mixing arrangement exports.
Detailed description of the invention
With detailed description of the invention, invention is described in further detail below in conjunction with the accompanying drawings.A kind of car that the present invention provides
With the assisted heating device of SCR system, its structure is: air compressor 1 is connected to burner by the first proportional solenoid 2
The air intake 28 of 16, exhaust gas turbine 18 inlet end is connected to exhaust gas entrance 27, exhaust gas turbine by the 3rd proportional solenoid 17
18 outlet sides are connected to mixing arrangement exhaust gas entrance 29, and liquefied gas input port is connected to burning dress by the second proportional solenoid 3
Put the liquefied gas entrance 19 of 16；
Outside diversion rod 22, it is disposed with air chamber 26, liquefaction air cavity 20, waste gas chamber 25 the most from the inside to the outside,
Having liquefied gas nozzle 21 on described liquefaction air cavity 20, described liquefied gas nozzle 21 stretches into air chamber 26, air chamber 26, liquefied gas
Chamber 20 and waste gas chamber 25 are compiled in combustor 24, and described combustor 24 is fixed with lighter 23；
The upper interface 31 of mixing arrangement 15 connects burner 16, is provided with mixing arrangement combustion gas chamber in described mixing arrangement 15
30, through a flue gas leading in described mixing arrangement combustion gas chamber 30, described flue gas leading one end is mixing arrangement exhaust gas entrance 29, separately
One end is mixing arrangement outlet 34, and flue gas leading is aditus laryngis 32 in mixing arrangement combustion gas chamber 30, and described aditus laryngis 32 has mixing
Hole 33；
It is provided with ignition module 8, the start and stop of described ignition module 8 control point firearm 23.
Manostat 4 also it is in series with between described liquefied gas input port and liquefied gas entrance 19.Described liquefied gas input port with
Pressure regulator valve 5 also it is in series with between liquefied gas entrance 19.Also it was in series with between described liquefied gas input port and liquefied gas entrance 19
Filter 6.Relief valve 7 also it is in series with between described liquefied gas input port and liquefied gas entrance 19.Described mixing arrangement outlet 34 is even
Receive SCR system 11.The second temperature sensing 14 it is provided with, between mixing arrangement 15 and SCR system 11 on described mixing arrangement 15
Pipeline on be provided with the second temperature and pressure sensing 12 and first temperature sensing 13, described SCR system 11 outlet side is provided with the first temperature
Pressure sensing 10.
Being additionally provided with controller 9, described controller 9 controls respectively and connects second proportional solenoid the 3, first ratio electromagnetism
Valve the 2, the 3rd proportional solenoid 17, ignition module the 8, second temperature sensing the 14, first temperature sensing the 13, second temperature and pressure sensing 12 with
And first temperature and pressure sensing 10.
Described controller 9 is by signal processing module, ignition signal module, solenoid valve driving module, alarm and ECU group
Become；Described signal processing module, real-time temperature sensor and the signal of pressure transducer, and transmit a signal to ECU；Institute
State solenoid valve driving module, realize the unlatching to each proportional solenoid by pulse voltage signal, close and rise process control；Institute
State ignition signal module, give described ignition module 8 one and trigger signal；Described alarm, after receiving ECU alarm signal, with
Blinking red lamp is reported to the police.
The auxiliary heating means of a kind of automotive SCR system, comprise the following steps:
After diesel engine igniting, ECU judges according to SCR system 11 real-time status parameter, and wherein system temperature threshold values is
400 DEG C, before and after SCR system 11, pressure reduction threshold values is 2kpa, when temperature less than 400 DEG C or pressure reduction more than 2kpa time, controller 9 is to point
Fire module 8, each proportional solenoid send and trigger signal；
Each proportional solenoid is opened, lighter 23 starts igniting, and ECU starts timing 30s, and ECU is by being positioned at combustor
Second temperature sensing 14 of 24 judges the most whether normal ignition；
When burner 16 normal ignition, halt is fought and each proportional solenoid aperture is real-time according to temperature rise situation
Regulation；After SCR system 11 temperature reaches 500 DEG C, controller 9 controls burner 16 and quits work, and closes each ratio
Electromagnetic valve；
When burner 16 is lighted a fire abnormal, controller 9 successively controls the second proportional solenoid 3 aperture liter of liquefied gas
Height, air gas circuit, the proportional solenoid aperture of diesel engine vent gas gas circuit reduce, and readjust mixture strength, and again light a fire；
Being reduced by the second proportional solenoid 3 aperture, air gas circuit, the proportional solenoid of diesel engine vent gas gas circuit raise, and again adjust again
Whole mixture strength, and again light a fire；When all fail for twice normal ignition time, in controller 9, alarm blinking red lamp is reported to the police, and
Control each proportional solenoid to close.
The work process of apparatus of the present invention is as follows:
When diesel engine starting, this heater is started working.Controller 9 receives first temperature sensing the 13, first temperature
Pressure sensing the 10, second temperature and pressure signals of being transmitted of sensing 12, judge, when temperature less than 400 DEG C or pressure reduction more than 2kpa time,
Controller 9 sends to touch and signals to ignition module 8 and proportional solenoid 2,3,17, and lighter 23 receives the electricity of ignition module 8
Starting igniting after pressure signal, proportional solenoid 2,3,17 is opened after receiving pulse signal, and the lift of proportional solenoid can
To realize regulation in real time.
Liquefied gas after filter 6, pressure regulator valve 5, manostat the 4, second proportional solenoid 3 pressure regulation and tune amount, with
The pressure of 1.1bar enters the liquefaction air cavity 20 of burner 16 from liquefied gas entrance 19, and enters sky by liquefied gas nozzle 21
Air cavity 26；Air introduces from air compressor 1 rear end, after the first proportional solenoid 2 tune amount, enters sky from air intake 28
Air cavity 26, mixes with from liquefied gas nozzle 21 liquefied gas out, forms combustion mixture afterwards.
Diesel exhaust, from exhaust gas turbine 18 front end bleed ports, after the 3rd proportional solenoid 17 tune amount, enters from waste gas
Mouth 27 enters the waste gas chamber 25 of burners 16, finally at diversion rod 22 end, after mixing with combustion mixture, enters combustor
24；After lighter 23 receives the ignition voltage of ignition module 8, starting arcing, combustion mixture starts burning after running into arcing；
The high-temperature gas of burning enters from the upper interface 31 of mixing arrangement 15, makees burning, bavin further in mixing arrangement combustion gas chamber 30
Oil machine waste gas enters aditus laryngis 32, owing to burner high-temperature gas has been provided with certain pressure by mixing arrangement exhaust gas entrance 29
The tail gas that power and blender Venturi effect are caused is by a certain degree of pressure drop formed during aditus laryngis 32 position, High Temperature Gas
Body can enter exhaustor by the mix aperture 33 of aditus laryngis 32 position week cloth and mix with diesel engine vent gas, finally goes out from mixing arrangement
Mouth 34 exits into SCR system 11, thus reaches to heat the purpose of SCR system 11.
When the first temperature sensing 13 detect SCR system 11 temperature reach 500 DEG C time, controller 9 make stop heating sentence
Disconnected, final plant closure proportional solenoid 2,3,17 and lighter 23, burner 16 quits work.
Causing the abnormal main cause of igniting is that mixture strength is not enough, particularly when diesel engine condition changes, empty
After air pressure mechanism of qi 1, the exhaust gas pressure before the pressure of air and exhaust gas turbine 18 all changes, and causes entry into burner 16
Mixture strength changes: overrich or the dilutest.Therefore, controller 9 takes two actions to ensure normal ignition.Work as control
Device 9 detects when burner 16 stops working by the second temperature sensing 14, first, takes to improve the second ratio of liquefied gas respectively
The lift of electromagnetic valve 3, reduces the lift of proportional solenoid 2,17, improves the concentration of gaseous mixture in burner 16, and point again
Fire；Next lift taking to reduce the second proportional solenoid 3 of liquefaction, improves the lift of proportional solenoid 2,17, reduces burning
The concentration of gaseous mixture in device 16, and again light a fire.If twice action does not all have normal ignition, warning red light in controller 9
Start flicker and close all proportions electromagnetic valve 2,3,17.
Claims (10)
1. the assisted heating device of an automotive SCR system, it is characterised in that air compressor (1) passes through the first ratio electromagnetism
Valve (2) is connected to the air intake (28) of burner (16), and exhaust gas turbine (18) inlet end passes through the 3rd proportional solenoid
(17) being connected to exhaust gas entrance (27), exhaust gas turbine (18) outlet side is connected to mixing arrangement exhaust gas entrance (29), and liquefied gas is defeated
Entrance is connected to the liquefied gas entrance (19) of burner (16) by the second proportional solenoid (3)；
At diversion rod (22) outward, air chamber (26), liquefaction air cavity (20), waste gas chamber it are disposed with the most from the inside to the outside
(25), described liquefaction air cavity (20) having liquefied gas nozzle (21), described liquefied gas nozzle (21) stretches into air chamber (26), empty
Air cavity (26), liquefaction air cavity (20) and waste gas chamber (25) are compiled in combustor (24), and described combustor (24) is fixed with lighter
(23)；
The upper interface (31) of mixing arrangement (15) connects burner (16), is provided with mixing arrangement combustion in described mixing arrangement (15)
Air cavity (30), through a flue gas leading in described mixing arrangement combustion gas chamber (30), described flue gas leading one end is mixing arrangement waste gas
Entrance (29), the other end is that mixing arrangement exports (34), and flue gas leading is aditus laryngis (32) in mixing arrangement combustion gas chamber (30), described
Mix aperture (33) is had on aditus laryngis (32)；
It is provided with ignition module (8), the start and stop at described ignition module (8) control point firearm (23).
2. the assisted heating device of automotive SCR system as claimed in claim 1, it is characterised in that described liquefied gas input port
And also it is in series with manostat (4) between liquefied gas entrance (19).
3. the assisted heating device of automotive SCR system as claimed in claim 1, it is characterised in that described liquefied gas input port
And also it is in series with pressure regulator valve (5) between liquefied gas entrance (19).
4. the assisted heating device of automotive SCR system as claimed in claim 1, it is characterised in that described liquefied gas input port
And also it is in series with filter (6) between liquefied gas entrance (19).
5. the assisted heating device of automotive SCR system as claimed in claim 1, it is characterised in that described liquefied gas input port
And also it is in series with relief valve (7) between liquefied gas entrance (19).
6. the assisted heating device of the automotive SCR system as described in any one of claim 1 to 5, it is characterised in that described mixing
Device outlet (34) is connected to SCR system (11).
7. the assisted heating device of automotive SCR system as claimed in claim 6, it is characterised in that described mixing arrangement (15)
On be provided with the second temperature sensing (14), the pipeline between mixing arrangement (15) and SCR system (11) is provided with the second temperature and pressure
Sensing (12) and the first temperature sensing (13), described SCR system (11) outlet side is provided with the first temperature and pressure sensing (10).
8. the assisted heating device of automotive SCR system as claimed in claim 7, it is characterised in that be additionally provided with controller
(9), described controller (9) controls and connects the second proportional solenoid (3), the first proportional solenoid (2), the 3rd ratio electricity respectively
Magnet valve (17), ignition module (8), the second temperature sensing (14), the first temperature sensing (13), the second temperature and pressure sensing (12) and the
One temperature and pressure sensing (10).
9. the assisted heating device of automotive SCR system as claimed in claim 8, it is characterised in that described controller (9) is by believing
Number processing module, ignition signal module, solenoid valve driving module, alarm and ECU composition；Described signal processing module, in real time
Temperature sensor and the signal of pressure transducer, and transmit a signal to ECU；Described solenoid valve driving module, passes through arteries and veins
Rush voltage signal to realize the unlatching to each proportional solenoid, close and rise process control；Described ignition signal module, gives described
Ignition module (8) one triggers signal；Described alarm, after receiving ECU alarm signal, reports to the police with blinking red lamp.
10. the auxiliary heating means of an automotive SCR system, it is characterised in that comprise the following steps:
After diesel engine igniting, ECU judges according to SCR system (11) real-time status parameter, and wherein system temperature threshold values is 400
DEG C, pressure reduction threshold values is 2kpa before and after SCR system (11), when temperature less than 400 DEG C or pressure reduction more than 2kpa time, controller (9) to
Ignition module (8), each proportional solenoid send and trigger signal；
Each proportional solenoid is opened, lighter (23) starts igniting, and ECU starts timing 30s, and ECU is by being positioned at combustor
(24) the second temperature sensing (14) judges the most whether normal ignition；
When burner (16) normal ignition, halt is fought and each proportional solenoid aperture is adjusted in real time according to temperature rise situation
Joint；After SCR system (11) temperature reaches 500 DEG C, controller (9) controls burner (16) and quits work, and closes each
Proportional solenoid；
When burner (16) is lighted a fire abnormal, controller (9) successively controls the second proportional solenoid (3) aperture of liquefied gas
Raising, air gas circuit, the proportional solenoid aperture of diesel engine vent gas gas circuit reduce, and readjust mixture strength, and point again
Fire；Being reduced by the second proportional solenoid (3) aperture, air gas circuit, the proportional solenoid of diesel engine vent gas gas circuit raise, weight again
Newly adjust mixture strength, and again light a fire；
When all fail for twice normal ignition time, in controller (9), alarm blinking red lamp is reported to the police, and controls each proportional solenoid
Close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630517.8A CN106089370B (en) | 2016-08-03 | 2016-08-03 | The assisted heating device and heating means of automotive SCR system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630517.8A CN106089370B (en) | 2016-08-03 | 2016-08-03 | The assisted heating device and heating means of automotive SCR system |
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| CN107449610A (en) * | 2017-08-16 | 2017-12-08 | 潍柴西港新能源动力有限公司 | Engine charge mixing uniformity analytical equipment and analysis method |
| CN111997719A (en) * | 2020-09-07 | 2020-11-27 | 潍柴动力股份有限公司 | Three way catalyst converter thermal management system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106089370B (en) | 2018-12-07 |
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