CN204609994U - A kind of air-assisted SCR urea injection system - Google Patents
A kind of air-assisted SCR urea injection system Download PDFInfo
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- CN204609994U CN204609994U CN201520310385.1U CN201520310385U CN204609994U CN 204609994 U CN204609994 U CN 204609994U CN 201520310385 U CN201520310385 U CN 201520310385U CN 204609994 U CN204609994 U CN 204609994U
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- 239000004202 carbamide Substances 0.000 title claims abstract description 221
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 208
- 238000002347 injection Methods 0.000 title claims abstract description 23
- 239000007924 injection Substances 0.000 title claims abstract description 23
- 239000000243 solution Substances 0.000 claims abstract description 33
- 230000006837 decompression Effects 0.000 claims abstract description 19
- 238000013022 venting Methods 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims description 43
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 23
- 239000000498 cooling water Substances 0.000 claims description 21
- 239000007789 gas Substances 0.000 claims description 20
- 239000000523 sample Substances 0.000 claims description 9
- 239000002826 coolant Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 230000030279 gene silencing Effects 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 description 16
- 230000001105 regulatory effect Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229910001868 water Inorganic materials 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 206010046555 Urinary retention Diseases 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000009466 transformation 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
- 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
- Y02T10/40—Engine management systems
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a kind of air-assisted SCR urea injection system, comprise vehicle air gas receiver, urea adds blue tank, engine exhaust muffler, urea injector, above-mentioned urea injector is communicated with the input end of engine exhaust muffler, it is characterized in that, above-mentioned vehicle air gas receiver is communicated with urea injector by air passageways, air conduit is provided with air filter core, air switching sol and decompression venting valve, above-mentioned urea is added blue tank and is communicated with urea injector by urea passage, urea passage is provided with urea essence filter filter core, urea solution pump and urea switch electromagnetic valve, in addition, emptying solenoid valve and one-way valve is provided with between decompression venting valve outlet end and urea solution pump entry end, air passageways is communicated with by one-way valve with urea passage.The utility model can avoid urea crystals, and jeting effect is good.
Description
Technical field
The utility model relates to a kind of air-assisted SCR urea injection system.
Background technique
Current pollution of atmosphere is day by day serious, and the automobile wherein using diesel engine to do power is important pollution sources.In order to protection of the environment, countries in the world have put into effect the relevant laws and regulations controlling motor vehicle exhaust emission in succession, and more and more stricter Abgasgesetz makes simple emission controls by improving combustion technology be difficult to satisfy regulatory requirement, and the outer post-processing technology of machine must be relied on to be assisted.Current main technological route is exactly selective catalytic reduction (SCR), by spraying the method for urea liquid in waste gas, the NOx in waste gas is reduced to harmless nitrogen, carbon dioxide and water.
Most current urea for vehicle injection apparatus adopts Liquid inject usually, and atomizing effect is poor, causes urea desorption column low, NH_3 leakage.And the product of Liquid inject adopts automatically controlled urea nozzle usually, and control valve is directly installed on outlet pipe, because high temperature easily causes automatically controlled nozzle to burn out.In addition, also some liquid injection apparatus terminates the reversion of relief urea pump at urea-spray, and the measure on blue tube road of finding time prevents the technological scheme of adding blue Crystallization Plugging spray orifice.After adopting this kind of scheme, automobile after a stoppage motor must rerun a period of time, or makes motor and transfer pump reverse a period of time by storage battery after engine cutoff; Also need to adopt reversible motor and transfer pump, can raise the cost, and practical operation is also very inconvenient.
In order to improve the transformation efficiency of SCR system, the secondary injection of general employing gas.The product major part of traditional air-assisted injection needs first air and urea liquid to be mixed in a mixing chamber, is then ejected in outlet pipe by mixed gas-liquid mixture.This kind of scheme easily causes urea crystals in mixing chamber, blocking mixing chamber.
Model utility content
For solving the problem, the utility model provides a kind of air-assisted SCR urea injection system avoiding urea crystals, jeting effect good.
The technical solution of the utility model is: a kind of air-assisted SCR urea injection system, comprise vehicle air gas receiver (1), urea adds blue tank (9), engine exhaust muffler (27), urea injector (14), above-mentioned urea injector (14) is communicated with the input end of engine exhaust muffler (27), it is characterized in that, above-mentioned vehicle air gas receiver (1) is communicated with urea injector (14) by air passageways (30), air conduit (30) is provided with air filter core (2), air switching sol (3) and decompression venting valve (4), above-mentioned urea is added blue tank (9) and is communicated with urea injector (14) by urea passage (29), urea passage (29) is provided with urea essence filter filter core (8), urea solution pump (10) and urea switch electromagnetic valve (12), in addition, emptying solenoid valve (6) and one-way valve (7) is provided with between decompression venting valve (4) outlet end and urea solution pump (10) entry end, air passageways (30) is communicated with by one-way valve (13) with urea passage (29).
Further, an air pressure probe (5) is had to be arranged between decompression venting valve (4) and urea injector (14), air pressure probe (5) and aftertreatment control unit DCU(23) be connected.
Further, a urea pressure transducer (11) is had to be arranged between urea solution pump (10) and urea switch electromagnetic valve (12), urea pressure transducer (11) and aftertreatment control unit DCU(23) be connected.
Further, above-mentioned urea solution pump (10), emptying solenoid valve (6), air switching sol (3), urea switch electromagnetic valve (12) respectively with aftertreatment control unit DCU(23) be connected.
Further, have a urea coarse filtration filter core (20) to be arranged on urea to add in blue tank (9).
Further, an exhaust gas temperature sensor (24) is had to be arranged on the inlet of engine exhaust muffler (27), have a nitrogen oxide sensor (25) to be arranged on the outlet port of starting suction fan silencing apparatus (27), above-mentioned exhaust gas temperature sensor (24) and nitrogen oxide sensor (25) respectively with aftertreatment control unit DCU(23) be connected.
Further, urea adds in blue tank (9) and is provided with cooling water passage (22), the cooling water inlet (16) of cooling water passage (22) is communicated with the circulation of motor (26) respectively with coolant outlet (17), the passage that cooling water inlet (16) connects is provided with cooling water solenoid valve (15), cooling water solenoid valve (15) and aftertreatment control unit DCU(23) be connected.
Further, a urea pipe heater (31) is had to be arranged on urea passage (29), above-mentioned urea pipe heater (31) and aftertreatment control unit DCU(23) be connected.
Further, above-mentioned aftertreatment control unit DCU(23) with engine electric-controlled unit ECU(28) be connected.
Further, above-mentioned urea injector (14) comprises air inlet (34), urea inlet (35), and interior spray orifice (36) and outer spray orifice (37), and interior spray orifice (36) and outer spray orifice (37) are concentric circle.
A kind of air-assisted SCR urea injection system that the utility model provides, compared with prior art, has following beneficial effect:
Urea switch electromagnetic valve (12) is provided with between urea solution pump (10) and urea injector (14), pressure can be built as early as possible after can ensureing system works, and can avoiding unnecessary urea being drained in engine exhaust pipe building to press through in journey, avoiding engine exhaust muffler (27) cannot catalytic reaction and cause urea crystals and block engine exhaust muffler (27) because arranging that temperature is too low;
Emptying solenoid valve (6) and one-way valve (7) is provided with between decompression venting valve (4) outlet end and urea solution pump (10) entry end, after motor is shut down, emptying solenoid valve (6) is opened, pressurized air enters the negative pressure line before urea solution pump (10) entrance through one-way valve (7), urea solution pump (10) and urea passage is made to be dried only, avoid at low temperatures icing of urea solution or due to moisture evaporation cause urea crystals, blocking urea passage, in addition, one-way valve (7) can avoid urea solution pump (10) urea liquid when building pressure to enter into the air outlet slit of emptying solenoid valve (6),
Air passageways (30) is communicated with urea passage (29) by one-way valve (13), and gas can be made to enter urea passage (29), accelerates urea flow velocity, the row of avoiding warm too high time block urea nozzle.
Accompanying drawing explanation
Fig. 1 is the working principle schematic diagram of the utility model specific embodiment.
Fig. 2 is the layout schematic diagram one of urea-spray unit in Fig. 1.
Fig. 3 is the layout schematic diagram two of urea-spray unit in Fig. 1.
Fig. 4 is the structural representation of urea injector in Fig. 1 and Fig. 2.
In figure: 1-vehicle air gas receiver; 2-air filter core; 3-air switching sol; 4-decompression venting valve; 5-air pressure probe; 6-emptying solenoid valve; 7-one-way valve; 8-urea essence filter filter core; 9-urea adds blue tank; 10-urea solution pump; 11-urea pressure transducer; 12-urea switch electromagnetic valve; 13-one-way valve; 14-urea injector; 15-cooling water solenoid valve; 16-cooling water inlet; 17-coolant outlet; 18-integrated form pressure-reduced and-regulated solenoid valve; 19-urea exports; 20-urea coarse filtration filter core; 21-urea-spray unit; 22-cooling water passage; 23-aftertreatment control unit DCU; 24-exhaust gas temperature sensor; 25-nitrogen oxide sensor; 26-motor; 27-engine exhaust muffler; 28-engine electric-controlled unit ECU; 29-urea passage; 30-air passageways; 31-urea pipe heater; 32-urea liquid level sensor; 33-urea temperature transducer; 34-air inlet; 35-urea inlet; Spray orifice in 36-; The outer spray orifice of 37-; P-integrated form pressure-reduced and-regulated solenoid valve air inlet; Air-out after the decompression of A1-integrated form pressure-reduced and-regulated solenoid valve; A2-integrated form pressure-reduced and-regulated solenoid valve emptying solenoid valve air-out.
Embodiment
Below in conjunction with accompanying drawing, also by specific embodiment, the utility model is elaborated, and following examples are to explanation of the present utility model, and the utility model is not limited to following mode of execution.
As shown in Figure 1, a kind of air-assisted SCR urea injection system that the utility model provides, comprise vehicle air gas receiver 1, urea adds blue tank 9, engine exhaust muffler 27, urea-spray unit 21 and urea injector 14, urea injector 14 is communicated with the input end of engine exhaust muffler 27, air is entered the air inlet 34 of urea injector 14 by vehicle air gas receiver 1 by urea-spray unit 21, urea adds urea is entered urea injector 14 by blue tank 9 urea inlet 35 by urea-spray unit 21, pipeline wherein between vehicle air gas receiver 1 and urea-spray unit 21, and the pipeline between the air inlet 34 of urea-spray unit 21 and urea injector 14 is air passageways 30, urea adds the pipeline between blue tank 9 and urea-spray unit 21, and the pipeline between the urea inlet 35 of urea-spray unit 21 and urea injector 14 is urea passage 29, in addition, pipeline between the urea inlet 35 of urea-spray unit 21 and urea injector 14 is provided with urea pipe heater 31, urea pipe heater 31 is connected with aftertreatment control unit DCU23.
The circulation of motor 26 adds blue tank 9 by condensation water channel 22 to urea and urea-spray unit 21 provides condensed water, cooling water passage 22 is arranged on urea and adds in blue tank 9 and urea-spray unit 21, urea-spray unit 21 is arranged in the top that urea adds blue tank 9, (as shown in Figure 3), cooling water is out received on cooling water inlet 16 by motor 26, condensed water gets back to motor 26 by coolant outlet 17 after urea-spray unit 21 and urea add in blue tank 9 circle that circulates, the passage that cooling water inlet 16 connects in urea-spray unit 21 is provided with condensed water solenoid valve 15, condensed water solenoid valve 15 is connected with aftertreatment control unit DCU23.
Urea adds on blue tank 9 and is provided with urea liquid level sensor 32 and urea temperature transducer 33, urea liquid level sensor 32 is connected with aftertreatment control unit DCU23 respectively with urea temperature transducer 33, for system is supplied urea the liquid level and temperature signal of adding blue tank 9, wherein urea level signal is used for judging that urea adds the volume of urea liquid in blue tank 9, when liquid level signal is lower than a threshold value, system is reported to the police in instrument, and reminding user is annotated urea liquid in time; Urea temperature signal is used for judging that urea adds the temperature in blue tank 9, and when temperature is lower than a threshold value, aftertreatment control unit DCU23 controlled cooling model water solenoid valve 15 and urea pipe heater 31 work; After the urea temperature of adding in blue tank 9 rises to certain value, Systematical control cooling water solenoid valve 15 and urea pipe heater 31 quit work.
The inlet of engine exhaust muffler 27 is provided with an exhaust gas temperature sensor 24, and the outlet port of engine exhaust muffler 27 is provided with a nitrogen oxide sensor 25, and exhaust gas temperature sensor 24 is connected with aftertreatment control unit DCU23 respectively with nitrogen oxide sensor 25.Aftertreatment control unit DCU23 is connected with engine electric-controlled unit ECU28, and carries out real-time Communication for Power by CAN message, so that aftertreatment control unit DCU23 obtains the working state of motor and car load in time.
As shown in Figure 2, urea-spray unit 21 comprises integrated form pressure-reduced and-regulated solenoid valve 18, air pressure probe 5, urea pressure transducer 11, urea solution pump 10, the filter of urea essence filter core 8, urea switch electromagnetic valve 12, one-way valve 7 and one-way valve 13.Integrated form pressure-reduced and-regulated solenoid valve 18 is integrated with air filter core 2, air switching sol 3, decompression venting valve 4 and emptying solenoid valve 6.Wherein, air passageways 30 air filter core 2, air switching sol 3, decompression venting valve 4 are successively set on from vehicle air gas receiver 1 to urea injector 14, air pressure probe 5 is arranged on the passage between decompression venting valve 4 and urea injector 14; Urea essence filter filter core 8, urea solution pump 10, urea switch electromagnetic valve 12 are successively set on and add the urea passage 29 blue tank 9 to urea injector 14 from urea, urea adds in blue tank 9 and is also provided with a urea coarse filtration filter core 20, the passage between urea solution pump 10 and urea switch electromagnetic valve 12 is provided with a urea pressure transducer 11; Emptying solenoid valve 6 and one-way valve 7 are arranged between decompression venting valve 4 outlet end and urea solution pump 10 entry end; One-way valve 13 is arranged in the communicating passage between air passageways 30 and urea passage 29.In addition, air pressure probe 5, urea pressure transducer 11, urea solution pump 10, urea switch electromagnetic valve 12, air switching sol 3, decompression venting valve 4 and emptying solenoid valve 6 are connected with aftertreatment control unit DCU23 respectively.
In practical work process, when after system electrification, air assists SCR system to start initialize internal parameter, has checked whether fault; If air assists SCR system to have fault, will failure code be reported and quit work.If system does not have fault, the pre-filled state before injection will be entered.Pre-filled working procedure is as follows: aftertreatment control unit DCU23 controls air switching sol 3 and opens, pressure to reduce through decompression venting valve 4 and is stabilized in 2bar by the pressurized air in vehicle air gas receiver 1, and pressurized air air-out A1 mouth after the decompression of integrated form pressure-reduced and-regulated solenoid valve of this pressure arrives the air inlet 34 of urea injector 14 and sprays in engine exhaust pipe; Air pressure probe 5 is used for monitoring post-decompression atmospheric pressure value, if this pressure signal is abnormal, aftertreatment control unit DCU23 control system is reported to the police.Meanwhile, aftertreatment control unit DCU23 controls urea solution pump 10 extracted urea solution, and when urea pressure transducer 11 monitors urea pressure increase to certain value, confirm that urea is built pressure and completed, the pre-filled state of system completes.After pre-filled state completes, when requiring to spray urea, calculating the urea requirement amount under current working by aftertreatment control unit DCU23, controlling urea solution pump 10 and carrying out accurate measurement, open urea switch electromagnetic valve 12, in engine exhaust pipe, spray into urea liquid.In working procedure, aftertreatment control unit DCU23 detects the concentration of the delivery temperature in engine exhaust muffler 27 and the oxynitrides NOx in exhaust respectively according to exhaust gas temperature sensor 24 and nitrogen oxide sensor 25, adjustment emitted dose; If there is the situation that NOx concentration exceeds standard, then control aftertreatment control unit DCU23 and carry out reporting to the police or limiting engine power.After engine stop work, aftertreatment control unit DCU23 control system enters emptying state; In this state, emptying solenoid valve 6 is opened, and pressurized air enters the negative pressure line before urea solution pump 10 entrance via one-way valve 7, and urea solution pump 10 works on; In the process, part pressurized air enters urea pressure piping via urea solution pump 10, urea solution pump 10, urea are exported residual urine cellulose solution in 19 urea pipes connected and sparger 14 and is discharged in engine exhaust pipe, residual urine cellulose solution in urea essence filter filter core 8 and place passage is pushed back urea and adds in blue tank 9 by another part pressurized air, avoid icing of urea solution or cause urea crystals, blocking urea supply passage due to moisture evaporation at low temperatures.
As shown in Figure 3, include 5 interfaces in urea-spray unit 21, after being respectively cooling water inlet 16, coolant outlet 17, integrated form pressure-reduced and-regulated solenoid valve air inlet P, the decompression of integrated form pressure-reduced and-regulated solenoid valve, air-out A1, urea export 19.
As shown in Figure 4, urea injector 14 comprises air inlet 34 and urea inlet 35, and interior spray orifice 36 and outer spray orifice 37; Wherein interior spray orifice 36 is urea spray orifice, outer spray orifice 37 is air jet orifices, and interior spray orifice 36 and outer spray orifice 37 are concentric circle, like this before ejection urea, urea and pressurized air are without mixed process, the urea sprayed from interior spray orifice 36 is dispelled by the pressurized air sprayed from outer spray orifice 37, is atomized, and spray better atomizing effect to reach than the pure liquid of simple high pressure, the Suo Teer diameter of urea droplets is less than 15 microns.In addition, after the decompression of integrated form pressure-reduced and-regulated solenoid valve, air-out A1 is connected with the air inlet 34 of urea injector 14 by pipeline, and urea outlet 19 is connected with the urea inlet 35 of urea injector 14 by pipeline.
The above is only preferred implementation of the present utility model; be noted that for those skilled in the art; under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. an air-assisted SCR urea injection system, comprise vehicle air gas receiver (1), urea adds blue tank (9), urea injector (14), engine exhaust muffler (27), described urea injector (14) is communicated with the input end of engine exhaust muffler (27), it is characterized in that, described vehicle air gas receiver (1) is communicated with urea injector (14) by air passageways (30), air conduit (30) is provided with air filter core (2), air switching sol (3) and decompression venting valve (4), described urea is added blue tank (9) and is communicated with urea injector (14) by urea passage (29), urea passage (29) is provided with urea essence filter filter core (8), urea solution pump (10) and urea switch electromagnetic valve (12), in addition, emptying solenoid valve (6) and one-way valve (7) is provided with between decompression venting valve (4) outlet end and urea solution pump (10) entry end, air passageways (30) is communicated with by one-way valve (13) with urea passage (29).
2. a kind of air-assisted SCR urea injection system according to claim 1, it is characterized in that, an air pressure probe (5) is had to be arranged between decompression venting valve (4) and urea injector (14), described air pressure probe (5) and aftertreatment control unit DCU(23) be connected.
3. a kind of air-assisted SCR urea injection system according to claim 1, it is characterized in that, a urea pressure transducer (11) is had to be arranged between urea solution pump (10) and urea switch electromagnetic valve (12), described urea pressure transducer (11) and aftertreatment control unit DCU(23) be connected.
4. a kind of air-assisted SCR urea injection system according to claim 1, it is characterized in that, described urea solution pump (10), emptying solenoid valve (6), air switching sol (3), urea switch electromagnetic valve (12) respectively with aftertreatment control unit DCU(23) be connected.
5. a kind of air-assisted SCR urea injection system according to claim 1, is characterized in that, has a urea coarse filtration filter core (20) to be arranged on urea and adds in blue tank (9).
6. a kind of air-assisted SCR urea injection system according to claim 1, it is characterized in that, an exhaust gas temperature sensor (24) is had to be arranged on the inlet of engine exhaust muffler (27), have a nitrogen oxide sensor (25) to be arranged on the outlet port of starting suction fan silencing apparatus (27), described exhaust gas temperature sensor (24) and nitrogen oxide sensor (25) respectively with aftertreatment control unit DCU(23) be connected.
7. a kind of air-assisted SCR urea injection system according to claim 1, it is characterized in that, urea adds in blue tank (9) and is provided with cooling water passage (22), the cooling water inlet (16) of cooling water passage (22) is communicated with the circulation of motor (26) respectively with coolant outlet (17), the passage that cooling water inlet (16) connects is provided with cooling water solenoid valve (15), cooling water solenoid valve (15) and aftertreatment control unit DCU(23) be connected.
8. a kind of air-assisted SCR urea injection system according to claim 1, it is characterized in that, a urea pipe heater (31) is had to be arranged on urea passage (29), described urea pipe heater (31) and aftertreatment control unit DCU(23) be connected.
9. a kind of air-assisted SCR urea injection system according to Claims 2 or 3 or 4 or 6 or 7 or 8, is characterized in that, described aftertreatment control unit DCU(23) with engine electric-controlled unit ECU(28) be connected.
10. a kind of air-assisted SCR urea injection system according to claim 1, it is characterized in that, described urea injector (14) comprises air inlet (34), urea inlet (35), and interior spray orifice (36) and outer spray orifice (37), interior spray orifice (36) and outer spray orifice (37) they are concentric circle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520310385.1U CN204609994U (en) | 2015-05-14 | 2015-05-14 | A kind of air-assisted SCR urea injection system |
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| CN201520310385.1U CN204609994U (en) | 2015-05-14 | 2015-05-14 | A kind of air-assisted SCR urea injection system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626210A (en) * | 2016-03-15 | 2016-06-01 | 茵卡排放控制系统（江苏）有限公司 | Anti-blockage device for air way of measurement unit of SCR system |
| CN105626205A (en) * | 2016-03-15 | 2016-06-01 | 茵卡排放控制系统（江苏）有限公司 | Differential pressure type urea pump for SCR exhaust gas after-treatment |
| CN106285851A (en) * | 2016-09-22 | 2017-01-04 | 凯龙高科技股份有限公司 | A kind of dosing pump fluid path blow device |
| CN106523093A (en) * | 2016-11-30 | 2017-03-22 | 凯德斯环保科技（烟台）有限公司 | Catalyst spraying device and method in SCR system |
| WO2017114013A1 (en) * | 2015-12-31 | 2017-07-06 | 天纳克（苏州）排放系统有限公司 | Urea nozzle |
| CN107701272A (en) * | 2017-10-31 | 2018-02-16 | 凯龙高科技股份有限公司 | A kind of urea supply system with high-pressure blowing function |
| CN110295983A (en) * | 2018-03-23 | 2019-10-01 | 罗伯特·博世有限公司 | The cleaning warning system and method for liquid for treating waste gas memory for SCR system |
| CN113009903A (en) * | 2021-02-22 | 2021-06-22 | 一汽解放汽车有限公司 | Fault diagnosis method and device, vehicle and storage medium |
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2015
- 2015-05-14 CN CN201520310385.1U patent/CN204609994U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017114013A1 (en) * | 2015-12-31 | 2017-07-06 | 天纳克（苏州）排放系统有限公司 | Urea nozzle |
| CN105626210A (en) * | 2016-03-15 | 2016-06-01 | 茵卡排放控制系统（江苏）有限公司 | Anti-blockage device for air way of measurement unit of SCR system |
| CN105626205A (en) * | 2016-03-15 | 2016-06-01 | 茵卡排放控制系统（江苏）有限公司 | Differential pressure type urea pump for SCR exhaust gas after-treatment |
| CN105626205B (en) * | 2016-03-15 | 2018-03-16 | 茵卡排放控制系统（江苏）有限公司 | Differential urea pump for SCR exhaust aftertreatments |
| CN105626210B (en) * | 2016-03-15 | 2018-03-16 | 茵卡排放控制系统（江苏）有限公司 | SCR system metering units air road preventing clogging up device |
| CN106285851A (en) * | 2016-09-22 | 2017-01-04 | 凯龙高科技股份有限公司 | A kind of dosing pump fluid path blow device |
| CN106523093A (en) * | 2016-11-30 | 2017-03-22 | 凯德斯环保科技（烟台）有限公司 | Catalyst spraying device and method in SCR system |
| CN107701272A (en) * | 2017-10-31 | 2018-02-16 | 凯龙高科技股份有限公司 | A kind of urea supply system with high-pressure blowing function |
| CN110295983A (en) * | 2018-03-23 | 2019-10-01 | 罗伯特·博世有限公司 | The cleaning warning system and method for liquid for treating waste gas memory for SCR system |
| CN110295983B (en) * | 2018-03-23 | 2022-07-08 | 罗伯特·博世有限公司 | Purge alarm system and method for an exhaust gas treatment fluid reservoir of an SCR system |
| CN113009903A (en) * | 2021-02-22 | 2021-06-22 | 一汽解放汽车有限公司 | Fault diagnosis method and device, vehicle and storage medium |
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