CN107060954A - Spraying system and control method for purifying exhaust carbon fume particle - Google Patents
Spraying system and control method for purifying exhaust carbon fume particle Download PDFInfo
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- CN107060954A CN107060954A CN201710172592.9A CN201710172592A CN107060954A CN 107060954 A CN107060954 A CN 107060954A CN 201710172592 A CN201710172592 A CN 201710172592A CN 107060954 A CN107060954 A CN 107060954A
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- valve
- controller
- pressure
- valve seat
- needle
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Classifications
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
- F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/148—Arrangement of sensors
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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
- Y02T10/40—Engine management systems
Abstract
The invention belongs to automobile technical field, specifically a kind of spraying system and control method for being used to purify exhaust carbon fume particle.The spraying system includes controller and injector；Controller is connected with ECU；Injector is connected with blast pipe；Controller includes switch electromagnetic valve, metering valve, first, second pressure sensor, controller upper shell and controller housing；Switch electromagnetic valve, metering valve, first pressure sensor are arranged on controller housing；Controller upper shell is fastened on controller housing；Second pressure sensor is arranged on controller upper shell；Described controller is connected with injector by fuel pipe.The present invention is a kind of stabilization that can be realized by controller and spray fuel pressure；The accurate control of injection fuel oil can be realized by metering valve；The coking risk of nozzle, and simple in construction, the manufacturing cost low spraying system and control method that are used to purify exhaust carbon fume particle can be avoided by the nozzle arrangements design of spraying system.
Description
Technical field
The invention belongs to automobile technical field, for the state of enforcement VI and later Diesel engine of Abgasgesetz, specifically
Say it is a kind of spraying system and control method for being used to purify exhaust carbon fume particle.
Background technology
Increasingly strict with motor vehicle dieselization and national Abgasgesetz, the emission problem for solving diesel engine seems extremely urgent
Cut.Current global widely used diesel particulate trap (DPF) technology tackles diesel emission particulate emission problem.It can be with
Caught before Particulate Emission material enters air, so as to effectively reduce diesel particulate emission.But with traveling
The increase of journey, increasing particle deposition causes exhaust back pressure to increase in trap, the economy and dynamic property of engine
Deteriorate, it is therefore necessary to the combustible particle oxidizing fire of trapping is fallen in time, DPF initiative regeneration is realized.DPF active again
During life, diesel fuel is fed in waste pipe using the spraying system of purification exhaust carbon fume particle, passed through
The temperature of gas extraction system is caused to increase after oxidation catalyst (DOC) catalysis oxidation.High-temperature fuel, which enters in DPF, carrys out oxidizing fire
The soot particle deposited in DPF.
Patent document DE102011075591A1 introduces a kind of device that fuel oil is sprayed to processing unit for tail.Should
Device includes the structures such as fuel gallery, cooling-water duct and compressed gas passage, and secondary injection is carried out using compressed gas, can
Effectively reduce nozzle coking risk.But the precision for how realizing system injection fuel oil is not described in this patent and complicated,
Manufacturing cost is high.
Patent document CN101454546B introduce it is a kind of be used for regenerate, temperature loading and/or heat management device and its from
The injection valve and method of category.Two kinds of valve heads and the structure of valve seat and the structure of two kinds of injection units are contained in patent, is introduced
It is a kind of be used to regenerating the component of exhaust gases of internal combustion engines after-treatment system, temperature load and/or heat management correlation method.
But do not described in patent and how to realize good atomizing effect and the generation of slagging prevention phenomenon.And this system architecture is complicated,
Processing cost is higher.
The content of the invention
The stabilization of injection fuel pressure can be realized by controller the invention provides a kind of；Can be real by metering valve
Now spray the accurate control of fuel oil；The coking risk of nozzle, and structure can be avoided by the nozzle arrangements design of spraying system
Simply, manufacturing cost the is low spraying system and control method that are used to purify exhaust carbon fume particle, solve existing injection apparatus
Above-mentioned deficiency.
Technical solution of the present invention is described with reference to the drawings as follows：
A kind of spraying system for being used to purify exhaust carbon particle, the spraying system includes controller 1 and injector 7；It is described
Controller 1 be connected with ECU14；Described injector 7 is connected with blast pipe 17；Wherein described controller 1 includes switch electricity
Magnet valve 2, metering valve 3, first pressure sensor 4, second pressure sensor 11, controller upper shell 5 and controller housing 6；Institute
Switch electromagnetic valve 2, metering valve 3, the first pressure sensor 4 stated are arranged on controller housing 6；Described controller upper shell
5 are fastened on controller housing 6 by screw and are connected with switch electromagnetic valve 2 and metering valve 3；Described second pressure sensor
11 are arranged on controller upper shell 5；Described injector 7 includes nozzle 8 and high-temperature heat insulation pad 9；Described nozzle 8 is fixed on
On blast pipe 17；Described high-temperature heat insulation pad 9 is arranged between nozzle 8 and blast pipe 17；Described controller 1 and injector 7
Connected by fuel pipe 10.
Described switch electromagnetic valve 2 includes the first magnet coil 201, the first needle-valve assembly 202, liquid outlet 203, the first valve
Seat 204, the spring 206 of inlet 205 and first；The lower end of described switch electromagnetic valve 2 is connected with controller housing 6, upper end with
Controller upper shell 5 is connected；Described liquid outlet 203 is opened in the lower end of the first valve seat 204, described inlet 205 and is opened in
The upper end of one valve seat 204；The lower end of the first described needle-valve assembly 202 is contacted with the first valve seat 204, the first needle-valve assembly 202
Upper end contacted with the bottom of the first spring 206；The first described needle-valve assembly 202 is under the compression of the first spring 206 with
One valve seat 204 is sealed；The first described magnet coil 201 is enclosed on outside the first needle-valve assembly 202.
Described metering valve 3 includes the second magnet coil 301, the second needle-valve assembly 302, the second valve seat 303, dip hatch
304 and second spring 305；The lower end of described metering valve 3 is connected with controller housing 6, upper end and the phase of controller upper shell 5
Even；Described dip hatch 304 is opened on the second valve seat 303；The upper end of the second described needle-valve assembly 302 and the second valve seat 303
Contact, the lower end of the second needle-valve assembly 302 is contacted with second spring 305；The second described needle-valve assembly 302 is in second spring
Sealed under 305 compression stress with the second valve seat 303；The second described magnet coil 301 is enclosed on outside the second needle-valve assembly 302.
Quick connector 501 and liquid outlet joint 502 are provided with described controller upper shell 5；Described controller shell
Body 6 is internally provided with pressure chamber 601.
Described nozzle 8 includes housing 801, ball valve 802, the 3rd spring 803, adjust pad 804, swirler the 805, the 3rd
Valve seat 806 and adapter 807；Described ball valve 802, the 3rd spring 803, adjust pad 804, swirler 805, the 3rd valve seat
806 are arranged in housing 801, and described housing 801 is welded as a whole with adapter 807；Described ball valve 802 and housing 801
Conical surface of inboard wall combine to form sealing cone；The upper end of the 3rd described spring 803 is contacted with ball valve 802, the 3rd spring 803
Lower end is contacted with adjust pad 804；Described adjust pad 804 is arranged between the 3rd spring 803 and swirler 805；It is described
The lower end of swirler 805 contacted with the 3rd valve seat 806；Spray-hole is provided with the 3rd described valve seat 806.
Described swirler 805 includes oil-feed tank 805.1, vortex groove 805.3；Described oil-feed tank 805.1 is opened in vortex
The axial sides of device 805 and with the 3rd valve seat 806 formation fuel gallery；Described vortex groove 805.3 is opened in the bottom of swirler 805
On end surface.
A kind of control method for being used to purify the spraying system of exhaust carbon particle, the control method comprises the following steps：
Step 1: the diesel oil that engine provides more than 5bar enters inlet 205, ECU14 roots by quick connector 501
Pressure control switch magnetic valve 2 is turned on and off in the pressure chamber 601 fed back according to first pressure sensor 4, realizes pressure chamber
Pressure stability is in 5bar ± 0.1bar in 601；
Step 2: row's temperature demand that ECU14 works according to diesel particulate trap 20, control metering valve 3 is with 1Hz frequency
Rate opens corresponding duration, realizes diesel oil metered injection；
Step 3: ECU 14 constantly monitors the pressure value of second pressure sensor 11, and after metering valve 3 is opened, the second pressure
The output pressure of force snesor 11 rises very rapidly up to 5bar, if without rising, metering valve 3 occurs stuck being not turned on failure, ECU 14
Report corresponding failure；After metering valve 3 is closed, the output pressure of second pressure sensor 11 is rapid to be declined from 5bar, if without decline,
There is stuck not ejection failure, the report corresponding failures of ECU 14 in injector 7.
Beneficial effects of the present invention are：The present invention is simple in construction and manufacturing cost is low, is realized when fuel oil sprays very high
Accuracy of spray and stability, can be diagnosed and be handled to failure in time, eddy current spraying nozzle can improve the atomization quality of nozzle
And be difficult to form coking.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is the sectional view of controller in the present invention；
Fig. 3 is the sectional view of injector in the present invention；
Fig. 4 is the perspective view of swirler in the present invention；
Fig. 5 is the schematic diagram of control method of the present invention.
In figure：1st, controller；2nd, switch electromagnetic valve；201st, the first magnet coil；202nd, the first needle-valve assembly；203rd, liquid is gone out
Mouthful；204th, the first needle-valve assembly；205th, inlet；206th, the first spring；3rd, metering valve；301st, the second magnet coil；302nd,
Two needle-valve assemblies；303rd, the second valve seat；304th, dip hatch；305th, second spring；4th, first pressure sensor；5th, controller upper casing
Body；501st, quick connector；502nd, liquid outlet joint；6th, controller housing；601st, pressure chamber；7th, injector；8th, nozzle；801st, shell
Body；802nd, ball valve；803rd, the 3rd spring；804th, adjust pad；805th, swirler；805.1st, oil-feed tank；805.2nd, vortex groove；
806th, the 3rd valve seat；807th, adapter；9th, high-temperature heat insulation pad；10th, fuel pipe；11st, second pressure sensor；12nd, the first temperature
Spend sensor；13rd, second temperature sensor；14、ECU；15th, forefront pressure sensor；16th, rear end pressure sensor；17th, it is vented
Pipe；18th, fuel film；19、DOC；20、DPF.
Embodiment
Refering to Fig. 1-Fig. 4, a kind of spraying system for being used to purify exhaust carbon particle, the spraying system includes the He of controller 1
Injector 7；Described controller 1 is connected with ECU14；Described injector 7 is connected with blast pipe 17；Wherein described controller
1 includes switch electromagnetic valve 2, metering valve 3, first pressure sensor 4, second pressure sensor 11, controller upper shell 5 and control
Device housing 6；Described switch electromagnetic valve 2, metering valve 3, first pressure sensor 4 are arranged on controller housing 6；Described control
Device upper shell 5 processed is fastened on controller housing 6 by screw and is connected with switch electromagnetic valve 2 and metering valve 3；Described second
Pressure sensor 11 is arranged on controller upper shell 5；Described injector 7 includes nozzle 8 and high-temperature heat insulation pad 9；Described
Nozzle 8 is fixed on blast pipe 17；Described high-temperature heat insulation pad 9 is arranged between nozzle 8 and blast pipe 17；Described controller
1 is connected with injector 7 by fuel pipe 10.
Described controller 1, it act as the fuel oil for setting up steady pressure, and is pressed according to exhaust aftertreatment demand by stable
Power fuel oil is conveyed to injector 7；Described switch electromagnetic valve 2 controls the break-make of the pressurization fuel oil of outside oil transfer pump generation；It is described
The monitoring fuel pressure of pressure chamber 601 of first pressure sensor 4 and be fed back to ECU 14；Described second pressure sensing
Device 11 monitoring fuel pipe 10 in pressure and by its pressure feedback to ECU 14；The described control steady pressure fuel oil of metering valve 3
Emitted dose；Described controller upper shell 5 and the integrated switch magnetic valve 2 of controller housing 6, metering valve 3 and first pressure are passed
Sensor 4 simultaneously forms fuel gallery.
Refering to Fig. 1, first pressure sensor 4, second pressure sensor 11 are together to fuel pressure formation closed-loop control.When
When the feedback pressure numerical value of second pressure sensor 11 produces larger difference with the fed back values of first pressure sensor 4, ECU 14
Amendment is made to the injection pulse width of metering valve 3 according to both fed back values.In addition, causing fuel leakage when metering valve 3 breaks down
When causing 10 pressure rise of fuel pipe, second pressure sensor 11 detects pressure anomaly and feeds back to ECU 14, ECU 14
Corresponding treatment measures, such as closing switch magnetic valve 2, indicator light alarm are made according to actual conditions；
Described injector 7, its fuel oil for acting as conveying metering valve 3 is ejected into blast pipe with fine spray pattern
Lu Zhong.Wherein nozzle 8, which is fixed on blast pipe, sprays fuel oil formation fine spray；High-temperature heat insulation pad 9 act as completely cutting off blast pipe
Endogenous pyrogen is to prevent fuel oil coking.
Refering to Fig. 2, described switch electromagnetic valve 2 includes the first magnet coil 201, the first needle-valve assembly 202, liquid outlet
203rd, the first valve seat 204, the spring 206 of inlet 205 and first；The lower end of described switch electromagnetic valve 2 and the phase of controller housing 6
Even, upper end is connected with controller upper shell 5；Described liquid outlet 203 is opened in the lower end of the first valve seat 204, described inlet
205 are opened in the upper end of the first valve seat 204；The lower end of the first described needle-valve assembly 202 is contacted with the first valve seat 204, the first pin
The upper end of valve assembly 202 is contacted with the bottom of the first spring 206；Pressure of the first described needle-valve assembly 202 in the first spring 206
Contracting is lower to be sealed with the first valve seat 204；The first described magnet coil 201 is enclosed on outside the first needle-valve assembly 202.
When the first magnet coil 201 is powered, the electromagnetic force that the first magnet coil 201 is produced causes the first needle-valve assembly
202 overcome the first spring 206 spring force upwards motion and most at last the first needle-valve assembly 202 from the position of the first valve seat 204 move
Move to open position.The external pressurized fuel oil now entered from quick connector 501 by inlet 205 enters switch electromagnetic valve
Inside 2, and entered by liquid outlet 203 in pressure chamber 601；When the first magnet coil 201 is powered off, switch electromagnetic valve 2 is closed,
External pressurized fuel oil cannot be introduced into pressure chamber 601.
Refering to Fig. 2, described metering valve 3 include the second magnet coil 301, the second needle-valve assembly 302, the second valve seat 303,
Dip hatch 304 and second spring 305；The lower end of described metering valve 3 is connected with controller housing 6, upper end and controller upper casing
Body 5 is connected；Described dip hatch 304 is opened on the second valve seat 303；The upper end of the second described needle-valve assembly 302 and the second valve
Seat 303 is contacted, and the lower end of the second needle-valve assembly 302 is contacted with second spring 305；The second described needle-valve assembly 302 is second
Sealed under the compression stress of spring 305 with the second valve seat 303；The second described magnet coil 301 is enclosed on outside the second needle-valve assembly 302
Portion.
When the second magnet coil 301 is powered, the electromagnetic force that the second magnet coil 301 is produced causes the second needle-valve assembly
302 overcome second spring 305 spring force upwards motion and most at last the second needle-valve assembly 302 from the position of the second valve seat 303 move
Move to open position.Now steady pressure fuel oil is ejected into liquid outlet joint 502 by dip hatch 304 in pressure chamber 601, wherein
Produce electromagnetic force driving metering valve 3 when second magnet coil 301 is powered to open, voltage stabilizing fuel oil enters nozzle 8 in pressure chamber 601；
The emitted dose of voltage stabilizing fuel oil obtains injection pulse width by the second magnet coil 301 and determined.
Refering to Fig. 2, switch electromagnetic valve 2 and metering valve 3 select identical structure type.Difference between the two is liquid
The fuel flow of mouth 203 is greater than the flow of dip hatch 304.When metering valve works, switch electromagnetic valve can be rapid from outside
Fuel oil is supplemented in order to avoid pressure oscillation larger in build-up of pressure chamber 601.
Refering to Fig. 2, quick connector 501 and liquid outlet joint 502 are provided with described controller upper shell 5；Described
Controller housing 6 is internally provided with pressure chamber 601.Controller upper shell 5 and controller lower house 6 are act as switch electromagnetic valve
2nd, metering valve 3, first pressure sensor 4, second pressure sensor 11 are integrated into controller 1 and provide fuel flow communication passage.Institute
It act as the interior pressurization fuel pressure of monitoring pressure chamber 601 and by its pressure feedback to ECU14 with the first pressure sensor 4 stated,
ECU14 being opened or being closed by the feedback pressure Numerical Control switch electromagnetic valve 2 of fuel pressure transmitter 4, finally realizes pressure
Pressure closed-loop stabilization is controlled in chamber 601.
Wherein described second pressure sensor 11 is communicated with fuel pipe 10, monitoring fuel pipe 10 in pressure and by its
Pressure feedback is to ECU 14；After metering valve 3 is opened, the output pressure of second pressure sensor 11 is raised rapidly and equal to pressure chamber
Pressure in 601；After metering valve 3 is closed, the output pressure of second pressure sensor 11 declines rapidly and waited opens pressure with injector 7
Power；ECU 14 constantly monitors the pressure value of second pressure sensor 11, when the pressure value of second pressure sensor 11 is beyond injection
Device 7 opens pressure limit in pressure and pressure chamber 601, then system breaks down, and ECU 14 quotes DTC, reminds user to carry out
Maintenance.
Refering to Fig. 3, described nozzle 8 includes housing 801, ball valve 802, the 3rd spring 803, adjust pad 804, swirler
805th, the 3rd valve seat 806 and adapter 807；Described ball valve 802, the 3rd spring 803, adjust pad 804, swirler 805,
Three valve seats 806 are arranged in housing 801, and described housing 801 is welded as a whole with adapter 807；Described ball valve 802 and shell
The conical surface of inboard wall of body 801 combines to form sealing cone；The upper end of the 3rd described spring 803 is contacted with ball valve 802, the 3rd spring
803 lower end is contacted with adjust pad 804；Described adjust pad 804 is arranged between the 3rd spring 803 and swirler 805；
The lower end of described swirler 805 is contacted with the 3rd valve seat 806；Spray-hole is provided with the 3rd described valve seat 806.
Injector 7 is used for fuel oil formation vortex shape fine spray.When the fuel oil that metering valve 3 sprays passes through fuel pipe 10
Into after nozzle 8, fuel pressure overcomes the spring force of the 3rd spring 803 so that ball valve 802 departs from the conical surface of inboard wall of housing 801, combustion
Oil enters inside nozzle 8, passes through the fluid of the formation rotation of swirler 805；Fluid is by the spray-hole on the 3rd valve seat 806 with essence
Fine atomization state is sprayed into blast pipe.
Housing 801 is used to encapsulate remaining part and be welded as a whole with adapter 807；Ball valve 803 and the inwall of housing 801
The conical surface combines to form sealing cone；Adjust pad 804 is used to fix spring 803；Swirler 805 is used for fuel oil formation vortex shape
Fine spray.After the fuel oil that metering valve 3 sprays enters nozzle 8 by fuel pipe 10, fuel pressure overcomes the bullet of spring 803
Spring force causes ball valve 802 to depart from the conical surface of inboard wall of housing 801, and fuel oil enters inside nozzle 8, passes through the formation rotation of swirler 805
Fluid；Fluid sprays into blast pipe 17 by the spray-hole on valve seat 806 with fine spray pattern
Refering to Fig. 4, described swirler 805 includes oil-feed tank 805.1, vortex groove 805.3；Described oil-feed tank 805.1
It is opened in the axial sides of swirler 805 and forms fuel gallery with the 3rd valve seat 806；Described vortex groove 805.3 is opened in vortex
On the bottom end face of device 805.
Oil-feed tank 805.1 cooperatively forms fuel gallery with valve seat, and the fuel oil into nozzle 8 can only be entered by oil-feed tank 805.1
Enter into vortex groove 805.2.After fuel oil enters vortex groove 805.2 from oil-feed tank 805.1, due to the eddy flow of vortex groove 805.2
Structure causes fuel oil flows out to produce rotation after vortex groove 805.2.Sprayed eventually through the spray-hole on the 3rd valve seat 80, in formation
Empty taper fine spray.
The fuel oil that said nozzle 8 is used to convey metering valve 3 is ejected into gas exhaust piping with fine spray pattern.
High-temperature heat insulation pad 9 is between nozzle 8 and blast pipe 17, for completely cutting off the transmission of the high temperature in blast pipe so that spray
The temperature of mouth 8 is much smaller than the temperature of blast pipe 17, prevents that fuel oil is retained inside nozzle 8 occurs high temperature fission generation coking.
First temperature sensor 12 is that oxidative diesel converter inlet is used to measure DOC19 entrances installed in DOC19
Delivery temperature, second temperature sensor 13 is exported for measuring DOC19 outlet exhaust temperatures installed in DOC19.The bases of ECU 14
The feedback information control controller 1 of various sensors, the delivery temperature before DPF 20 is controlled by adjusting the distributive value of nozzle 8
To remove carbon soot particles.ECU 14 can be diesel particulate trap forefront pressure sensor 15 and rear side pressure according to DPF 20
The differential pressure information that force snesor 16 feeds back calculates DPF 20 carbon soot particles useful load.ECU 14 loads gauge according to carbon soot particles
Calculate base fuel emitted dose model.
During DPF 20 regeneration, the spray fuel into blast pipe of nozzle 8.Most of fuel with exhaust mix and
DOC19 is catalysis oxidation in oxidative diesel converter.The catalysis oxidation of fuel, which is improved, is input to DPF20 i.e. diesel engine particles
The delivery temperature of trap is with the carbon soot particles in DPF 20.Nozzle 8 be ejected into some fuel oils in blast pipe not with exhaust
Mix and be deposited on formation fuel film 18 on the inwall 17 of blast pipe.Arrived when fuel film 18 evaporates release fuel oil in blast pipe
When in exhaust, excess fuel will cause the delivery temperature for being input to DPF20 to raise and damaged beyond its tolerable temperature extremely
DPF20, therefore ECU 14 is according to the accumulation rate of fuel film 18 and the evaporation rate formation injection correction model of fuel oil, by this mould
Type amendment diesel injection demand.
Refering to Fig. 5, a kind of control method for being used to purify the spraying system of exhaust carbon particle, the control method includes following
Step：
Step 1: the diesel oil that engine provides more than 5bar enters inlet 205, ECU14 roots by quick connector 501
Pressure control switch magnetic valve 2 is turned on and off in the pressure chamber 601 fed back according to first pressure sensor 4, realizes pressure chamber
Pressure stability is in 5bar ± 0.1bar in 601；
Step 2: row's temperature demand that ECU14 works according to diesel particulate trap 20, control metering valve 3 is with 1Hz frequency
Rate opens corresponding duration, realizes diesel oil metered injection；
Step 3: ECU 14 constantly monitors the pressure value of second pressure sensor 11, and after metering valve 3 is opened, the second pressure
The output pressure of force snesor 11 rises very rapidly up to 5bar, if without rising, metering valve 3 occurs stuck being not turned on failure, ECU 14
Report corresponding failure；After metering valve 3 is closed, the output pressure of second pressure sensor 11 is rapid to be declined from 5bar, if without decline,
There is stuck not ejection failure, the report corresponding failures of ECU 14 in injector 7.
Claims (7)
1. a kind of spraying system for being used to purify exhaust carbon particle, it is characterised in that the spraying system includes controller (1) and spray
Emitter (7)；Described controller (1) is connected with ECU (14)；Described injector (7) is connected with blast pipe (17)；It is wherein described
Controller (1) include switch electromagnetic valve (2), metering valve (3), first pressure sensor (4), second pressure sensor (11),
Controller upper shell (5) and controller housing (6)；Described switch electromagnetic valve (2), metering valve (3), first pressure sensor
(4) it is arranged on controller housing (6)；Described controller upper shell (5) is fastened on controller housing (6) simultaneously by screw
It is connected with switch electromagnetic valve (2) and metering valve (3)；Described second pressure sensor (11) is arranged on controller upper shell (5)
On；Described injector (7) includes nozzle (8) and high-temperature heat insulation pad (9)；Described nozzle (8) is fixed on blast pipe (17)；
Described high-temperature heat insulation pad (9) is arranged between nozzle (8) and blast pipe (17)；Described controller (1) leads to injector (7)
Cross fuel pipe (10) connection.
2. a kind of spraying system for being used to purify exhaust carbon particle according to claim 1, it is characterised in that described opens
Powered-down magnet valve (2) include the first magnet coil (201), the first needle-valve assembly (202), liquid outlet (203), the first valve seat (204),
Inlet (205) and the first spring (206)；The lower end of described switch electromagnetic valve (2) is connected with controller housing (6), upper end
It is connected with controller upper shell (5)；Described liquid outlet (203) is opened in the lower end of the first valve seat (204), described inlet
(205) it is opened in the upper end of the first valve seat (204)；The lower end of the first described needle-valve assembly (202) connects with the first valve seat (204)
Touch, the upper end of the first needle-valve assembly (202) is contacted with the bottom of the first spring (206)；The first described needle-valve assembly (202) exists
Sealed under the compression of first spring (206) with the first valve seat (204)；Described the first magnet coil (201) is enclosed on the first needle-valve
Assembly (202) is outside.
3. a kind of spraying system for being used to purify exhaust carbon particle according to claim 1, it is characterised in that described meter
Measuring valve (3) includes the second magnet coil (301), the second needle-valve assembly (302), the second valve seat (303), dip hatch (304) and the
Two springs (305)；The lower end of described metering valve (3) is connected with controller housing (6), upper end and controller upper shell (5) phase
Even；Described dip hatch (304) is opened on the second valve seat (303)；The upper end of the second described needle-valve assembly (302) and the second valve
Seat (303) contact, the lower end of the second needle-valve assembly (302) is contacted with second spring (305)；The second described needle-valve assembly
(302) sealed under the compression stress of second spring (305) with the second valve seat (303)；Described the second magnet coil (301) is enclosed on
Second needle-valve assembly (302) is outside.
4. a kind of spraying system for being used to purify exhaust carbon particle according to claim 1, it is characterised in that described control
Quick connector (501) and liquid outlet joint (502) are provided with device upper shell (5) processed；Set inside described controller housing (6)
It is equipped with pressure chamber (601).
5. a kind of spraying system for being used to purify exhaust carbon particle according to claim 1, it is characterised in that described spray
Mouth (8) includes housing (801), ball valve (802), the 3rd spring (803), adjust pad (804), swirler (805), the 3rd valve seat
And adapter (807) (806)；Described ball valve (802), the 3rd spring (803), adjust pad (804), swirler (805),
Three valve seats (806) are arranged in housing (801), and described housing (801) is welded as a whole with adapter (807)；Described ball
The conical surface of inboard wall of valve (802) and housing (801) combines to form sealing cone；The upper end of the 3rd described spring (803) and ball valve
(802) contact, the lower end of the 3rd spring (803) is contacted with adjust pad (804)；Described adjust pad (804) is arranged at
Between three springs (803) and swirler (805)；The lower end of described swirler (805) is contacted with the 3rd valve seat (806)；It is described
The 3rd valve seat (806) on be provided with spray-hole.
6. a kind of spraying system for being used to purify exhaust carbon particle according to claim 5, it is characterised in that described whirlpool
Flowing device (805) includes oil-feed tank (805.1), vortex groove (805.3)；Described oil-feed tank (805.1) is opened in swirler (805) axle
Fuel gallery is formed to side and with the 3rd valve seat (806)；Described vortex groove (805.3) is opened in the bottom of swirler (805)
On end surface.
7. it is according to claim 1, it is characterised in that the control method comprises the following steps：
Step 1: the diesel oil that engine provides more than 5bar enters inlet (205), ECU (14) by quick connector (501)
Being turned on and off for pressure chamber (601) interior pressure control switch magnetic valve (2) fed back according to first pressure sensor (4), it is real
Existing pressure chamber (601) interior pressure stability is in 5bar ± 0.1bar；
Step 2: row's temperature demand that ECU (14) works according to diesel particulate trap (20), control metering valve (3) is with 1Hz's
Frequency opens corresponding duration, realizes diesel oil metered injection；
Step 3: ECU (14) constantly monitors second pressure sensor (11) pressure value, and after metering valve (3) is opened, the second pressure
Force snesor (11) output pressure rises very rapidly up to 5bar, if without rising, metering valve (3) appearance is stuck to be not turned on failure, ECU
(14) corresponding failure is reported；After metering valve (3) is closed, second pressure sensor (11) output pressure declines rapidly from 5bar, if
Without decline, then there is stuck not ejection failure, ECU (14) report corresponding failures in injector (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710172592.9A CN107060954B (en) | 2017-03-22 | 2017-03-22 | Injection system for purifying exhaust carbon smoke particles and control method |
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| CN201710172592.9A CN107060954B (en) | 2017-03-22 | 2017-03-22 | Injection system for purifying exhaust carbon smoke particles and control method |
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| CN107060954B CN107060954B (en) | 2023-04-07 |
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| CN110593990A (en) * | 2019-09-25 | 2019-12-20 | 潍柴动力股份有限公司 | Fuel pipeline leakage detection method of HC injection system and related device |
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| CN107060954B (en) | 2023-04-07 |
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