CN205591988U - Be applicable to state IV and above emission diesel engine with falling nitrogen oxygen injection system - Google Patents
Be applicable to state IV and above emission diesel engine with falling nitrogen oxygen injection system Download PDFInfo
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- CN205591988U CN205591988U CN201620431479.9U CN201620431479U CN205591988U CN 205591988 U CN205591988 U CN 205591988U CN 201620431479 U CN201620431479 U CN 201620431479U CN 205591988 U CN205591988 U CN 205591988U
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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
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Abstract
The utility model relates to a be applicable to state IV and above emission diesel engine with falling nitrogen oxygen injection system. It includes urea nozzle and urea tank, the urea nozzle links to each other with the input of engine exhaust silencer, the one end of first pipeline stretches into to the urea tank bottom, the other end of first pipeline is in proper order through urea pump, link to each other with the urea nozzle behind the check valve, air gas storage tank passes through the second pipeline in proper order through air switch, link to each other with the urea nozzle behind the air -vent valve, the one end of third pipeline links to each other with the urea tank top, part on the other end of third pipeline and the first pipeline between urea nozzle and the check valve links to each other, the air -vent valve passes through the fourth pipeline and links to each other with the third pipeline. The utility model discloses construct reasonable in design, convenient to use, the nitrogen oxide conversion is efficient.
Description
Technical field
This utility model relates to one and is applicable to state IV and above discharge use for diesel engine fall nitrogen oxygen spraying system.
Background technology
The urban atmospheric pollution of China just changes with the compound pollution of automobile exhausting to coal smoke from coal-smoke pollution, and vehicle emission pollution has become as China's development, the Social Events that particularly big and medium-sized cities development is very important.Along with the further reduction of gasoline car discharge, diesel vehicle disposal of pollutants problem becomes increasingly conspicuous.The major pollutants of emission of diesel engine are NOx(nitrogen oxides) and PM, China's Motor Vehicle Pollution Prevention annual statistics data show, China's diesel vehicle constitutes about the 17% of whole nation automobile pollution at present, but NOx and PM of emission of diesel engine accounts for the 67% and more than 99% of vehicle mass exhaust total quantity.Although especially 5% of the heavy motor truck Zhi Zhan China automobile pollution with diesel oil as fuel, but its NOx discharge accounts for the 49% of vehicle mass exhaust total quantity.The particulate matter of emission of diesel engine is mainly fine particle, and Nox can be converted into fine particle, and can promote the conversion to fine particle of other pollutant.Therefore, effectively control heavy-duty diesel vehicle pollutant emission for Control of total air pollutant emission, realize ten predeterminated targets of state, improve Regional Atmospheric Environment there is particularly important meaning.
SCR system is all selected in most of China diesel engine enterprise, SCR (Selective Catalytic Reduction) is a kind of SCR technology, according to engine operation condition, carbamide is sprayed in the exhaust pipe of engine, carbamide carries out chemical reaction in the gaseous mixture arrival catalyst converter of waste gas, the harmful gass such as the oxynitride in waste gas are converted into harmless nitrogen and water, thus reduce the purpose of poisonous exhaust composition.The advantage of SCR system is modified without to body, i.e. the automatically controlled bare machine of state III can realize state IV plus SCR；Engine Durability is good；Fuel economy is good；Low to fuel oil and machine oil quality requirements；Risk is blocked without catalyst converter；Technology upgrading seriality is preferable；Maintenance cost is low.In order to improve the transformation efficiency of SCR system, need the fall nitrogen oxygen spraying system for SCR system badly.
Utility model content
This utility model provides one and is applicable to state IV and above discharge use for diesel engine fall nitrogen oxygen spraying system, its reasonable in design, and easy to use, NOx conversion efficiency is high, solves problems of the prior art.
By the above-mentioned technical problem of solution, this utility model be the technical scheme is that it includes urea nozzle and urea tank, urea nozzle is connected with the input of engine exhaust muffler, one end of first pipeline stretches to bottom urea tank, the other end of the first pipeline is successively through urea pump, it is connected with urea nozzle after check valve, air storage tank passes through the second pipeline successively through air switch, it is connected with urea nozzle after pressure regulator valve, one end of 3rd pipeline is connected with urea tank top, on the other end of the 3rd pipeline and the first pipeline, the part between urea nozzle and check valve is connected, pressure regulator valve is connected by the 4th pipeline and the 3rd pipeline.
Urea pump, air switch are connected with control unit for vehicle DCU by wire respectively, and control unit for vehicle DCU is connected with car running computer ECU.
Described urea pump is provided with pressure transducer, and pressure transducer is connected with control unit for vehicle DCU by wire.
The first pipeline before described urea pump water inlet end is provided with carbamide cleaner.
Input at engine exhaust muffler is provided with exhaust gas temperature sensor, and the outfan at engine exhaust muffler is provided with nitrogen oxide sensor, and exhaust gas temperature sensor, nitrogen oxide sensor are connected with control unit for vehicle DCU by wire respectively.
Urea tank is provided with urea liquid level sensor and urea temperature sensor, and urea liquid level sensor is connected with control unit for vehicle DCU by wire respectively with urea temperature sensor.
This utility model uses such scheme, has the advantage that
1, this utility model utilizes compressed air to assist the injection of aqueous solution of urea, improves the transformation efficiency of nitrogen oxides.During urea pump work, aqueous solution of urea is drawn out of from urea tank, sprays from urea nozzle after check valve；Meanwhile, compressed air is released from air storage tank, after air switch enters pressure regulator valve, pressure is reduced to 2bar by original about 8bar, this compressed air has two-way whereabouts, wherein a road is to mix with aqueous solution of urea after the second pipeline, urea nozzle, is then sprayed onto in exhaustor, and aqueous solution of urea is atomized in exhaustor and is uniformly distributed, so that the aqueous solution of urea after Wu Hua fully reacts with nitrogen oxides, improve the transformation efficiency of nitrogen oxides.Urea pump is used for measuring aqueous solution of urea emitted dose, it is ensured that the emitted dose of aqueous solution of urea accurately controls.An other road compressed air arrives the 3rd pipeline through the 4th pipeline, one end of 3rd pipeline is connected with urea tank top, on the other end of the 3rd pipeline and the first pipeline, the part between urea nozzle and check valve is connected, thus aqueous solution of urea remaining in the first pipeline, urea pump, urea nozzle is blown off, in order to avoid aqueous solution of urea is because ambient temperature is less than crystallizing after subzero 11 DEG C during using in the winter time, it is to avoid the blocking of the first pipeline and urea pump, urea nozzle are caused damage.Urea pump, air switch are connected with control unit for vehicle DCU by wire respectively, and control unit for vehicle DCU is connected with car running computer ECU, it is simple to automatically controlling of this fall nitrogen oxygen spraying system.
2, urea pump is provided with pressure transducer, and pressure transducer is connected with control unit for vehicle DCU by wire.Pressure transducer real-time judge aqueous solution of urea builds pressure the most normally, and the emitted dose further ensuring aqueous solution of urea accurately controls.
3, the first pipeline before urea pump water inlet end is provided with carbamide cleaner.Carbamide cleaner can impurity in filter urea aqueous solution and trickle particulate matter, it is ensured that the degree of purity of the aqueous solution of urea of urea nozzle ejection, improves the transformation efficiency of nitrogen oxides.
4, the input at engine exhaust muffler is provided with exhaust gas temperature sensor, outfan at engine exhaust muffler is provided with nitrogen oxide sensor, exhaust gas temperature sensor, nitrogen oxide sensor are connected with control unit for vehicle DCU by wire respectively, control unit for vehicle DCU is connected with car running computer ECU, in order to control unit for vehicle DCU obtains the duty of electromotor and car load in time.
5, urea tank is provided with urea liquid level sensor and urea temperature sensor, and urea liquid level sensor is connected with control unit for vehicle DCU by wire respectively with urea temperature sensor.This structure is designed as this fall nitrogen oxygen spraying system and supplies urea the liquid level of aqueous solution of urea in tank and temperature thereof.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, 1, urea nozzle, 2, urea tank, 3, engine exhaust muffler, 4, the first pipeline, 5, urea pump, 6, check valve, 7, air storage tank, the 8, second pipeline, 9, air switch, 10, pressure regulator valve, the 11, the 3rd pipeline, the 12, the 4th pipeline, 13, pressure transducer, 14, carbamide cleaner, 15, exhaust gas temperature sensor, 16, nitrogen oxide sensor, 17, urea liquid level sensor, 18, urea temperature sensor.
Detailed description of the invention
For the technical characterstic of this programme can be clearly described, below by detailed description of the invention, and combining its accompanying drawing, the utility model is elaborated.
As shown in FIG., this utility model includes urea nozzle 1 and urea tank 2, urea nozzle 1 is connected with the input of engine exhaust muffler 3, one end of first pipeline 4 stretches to bottom urea tank 2, the other end of the first pipeline 4 is successively through carbamide cleaner 14, urea pump 5, it is connected with urea nozzle 1 after check valve 6, air storage tank 7 passes through the second pipeline 8 successively through air switch 9, it is connected with urea nozzle 1 after pressure regulator valve 10, one end of 3rd pipeline 11 is connected with urea tank 2 top, on the other end of the 3rd pipeline 11 and the first pipeline 4, the part between urea nozzle 1 and check valve 6 is connected, pressure regulator valve 10 is connected with the 3rd pipeline 11 by the 4th pipeline 12.Urea pump 5, air switch 9 are connected with control unit for vehicle DCU by wire respectively, and control unit for vehicle DCU is connected with car running computer ECU.Urea pump 5 is provided with pressure transducer 13, and pressure transducer 13 is connected with control unit for vehicle DCU by wire.Input at engine exhaust muffler 3 is provided with exhaust gas temperature sensor 15, and the outfan at engine exhaust muffler 3 is provided with nitrogen oxide sensor 16, and exhaust gas temperature sensor, nitrogen oxide sensor are connected with control unit for vehicle DCU by wire respectively.Urea tank 2 is provided with urea liquid level sensor 17 and urea temperature sensor 18, and urea liquid level sensor 17 is connected with control unit for vehicle DCU by wire respectively with urea temperature sensor 18.
This utility model utilizes compressed air to assist the injection of aqueous solution of urea, improves the transformation efficiency of nitrogen oxides.When urea pump 5 works, aqueous solution of urea is drawn out of from urea tank 2, sprays from urea nozzle 1 after check valve 6；Meanwhile, compressed air is released from air storage tank 7, after air switch 9 enters pressure regulator valve 10, pressure is reduced to 2bar by original about 8bar, this compressed air has two-way whereabouts, wherein a road is to mix with aqueous solution of urea after the second pipeline 8, urea nozzle 1, is then sprayed onto in exhaustor, and aqueous solution of urea is atomized in exhaustor and is uniformly distributed, so that the aqueous solution of urea after Wu Hua fully reacts with nitrogen oxides, improve the transformation efficiency of nitrogen oxides.Urea pump 5 is used for measuring aqueous solution of urea emitted dose, it is ensured that the emitted dose of aqueous solution of urea accurately controls.An other road compressed air arrives the 3rd pipeline 11 through the 4th pipeline 12, one end of 3rd pipeline 11 is connected with urea tank 2 top, on the other end of the 3rd pipeline 11 and the first pipeline 4, the part between urea nozzle 1 and check valve 6 is connected, thus the first pipeline 4, urea pump 5, the aqueous solution of urea of the inner remnants of urea nozzle 1 are blown off, in order to avoid aqueous solution of urea is because ambient temperature is less than crystallizing after subzero 11 DEG C during using in the winter time, it is to avoid the blocking of the first pipeline 4 and urea pump 5, urea nozzle 1 are caused damage.Urea pump 5, air switch 9 are connected with control unit for vehicle DCU by wire respectively, and control unit for vehicle DCU is connected with car running computer ECU, it is simple to automatically controlling of this fall nitrogen oxygen spraying system.
Urea pump 5 is provided with pressure transducer 13, and pressure transducer 13 is connected with control unit for vehicle DCU by wire.Pressure transducer 13 real-time judge aqueous solution of urea builds pressure the most normally, and the emitted dose further ensuring aqueous solution of urea accurately controls.
The first pipeline before urea pump 5 water inlet end is provided with carbamide cleaner 14.Carbamide cleaner 14 can impurity in filter urea aqueous solution and trickle particulate matter, it is ensured that the degree of purity of the aqueous solution of urea of urea nozzle 1 ejection, improves the transformation efficiency of nitrogen oxides.
Input at engine exhaust muffler 3 is provided with exhaust gas temperature sensor 15, outfan at engine exhaust muffler 3 is provided with nitrogen oxide sensor 16, exhaust gas temperature sensor 15, nitrogen oxide sensor 16 are connected with control unit for vehicle DCU by wire respectively, control unit for vehicle DCU is connected with car running computer ECU, in order to control unit for vehicle DCU obtains the duty of electromotor and car load in time.
Urea tank 2 is provided with urea liquid level sensor 17 and urea temperature sensor 18, and urea liquid level sensor 17 is connected with control unit for vehicle DCU by wire respectively with urea temperature sensor 18.This structure is designed as this fall nitrogen oxygen spraying system and supplies urea the liquid level of aqueous solution of urea in tank 2 and temperature thereof.
The work process of SCR system is: after system electrification, control unit for vehicle DCU detection electromotor and car load duty, the parameter provided according to vehicle and engine electric-controlled system, and the data that nitrogen oxide sensor 16 provides, it is determined whether need SCR system to work；If needing SCR system to work, air switch 9 is opened, and pressure is reduced through pressure regulator valve 10 and stablizes at 0.2MPa by the compressed air of air storage tank 7, and the compressed air of this pressure sprays into the exhaust pipe of engine through urea nozzle 1；nullSimultaneously，Control unit for vehicle DCU controls urea pump 5 extracted urea aqueous solution，When pressure transducer 13 detects that rising occurs in energy storage pressure，Confirm that the first pipeline 4 has been filled with，Spray regime can be entered，Control unit for vehicle DCU calculates required emitted dose，Situation about exceeding standard if there is NOx，Car running computer ECU carries out reporting to the police or limiting engine torque，After engine stop work，Control unit for vehicle DCU stops carbamide injection，At this moment compressed air is needed to empty，By the first pipeline 4、Urea pump 5、Aqueous solution of urea in urea nozzle 1 is discharged，Aqueous solution of urea in carbamide cleaner 14 to be also blown back in urea tank 2 simultaneously，Avoid due to carbamide low temperature crystallization thus cause the blocking of the first pipeline 4 and to urea pump 5、Urea nozzle 1、Carbamide cleaner 14 causes damage.
Above-mentioned detailed description of the invention cannot function as the restriction to this utility model protection domain, and to those of ordinary skill in the art, any alternate modification or the conversion of being made this utility model embodiment all fall within protection domain of the present utility model.
This utility model does not describes part in detail, is the known technology of those skilled in the art of the present technique.
Claims (6)
1. one kind is applicable to state IV and above discharge use for diesel engine fall nitrogen oxygen spraying system, it is characterized in that: include urea nozzle and urea tank, urea nozzle is connected with the input of engine exhaust muffler, one end of first pipeline stretches to bottom urea tank, the other end of the first pipeline is successively through urea pump, it is connected with urea nozzle after check valve, air storage tank passes through the second pipeline successively through air switch, it is connected with urea nozzle after pressure regulator valve, one end of 3rd pipeline is connected with urea tank top, on the other end of the 3rd pipeline and the first pipeline, the part between urea nozzle and check valve is connected, pressure regulator valve is connected by the 4th pipeline and the 3rd pipeline.
One the most according to claim 1 is applicable to state IV and above discharge use for diesel engine fall nitrogen oxygen spraying system, it is characterized in that: urea pump, air switch are connected with control unit for vehicle DCU by wire respectively, and control unit for vehicle DCU is connected with car running computer ECU.
One the most according to claim 1 is applicable to state IV and above discharge use for diesel engine fall nitrogen oxygen spraying system, it is characterised in that: described urea pump is provided with pressure transducer, and pressure transducer is connected with control unit for vehicle DCU by wire.
One the most according to claim 1 is applicable to state IV and above discharge use for diesel engine fall nitrogen oxygen spraying system, it is characterised in that: the first pipeline before described urea pump water inlet end is provided with carbamide cleaner.
One the most according to claim 1 is applicable to state IV and above discharge use for diesel engine fall nitrogen oxygen spraying system, it is characterized in that: the input at engine exhaust muffler is provided with exhaust gas temperature sensor, outfan at engine exhaust muffler is provided with nitrogen oxide sensor, and exhaust gas temperature sensor, nitrogen oxide sensor are connected with control unit for vehicle DCU by wire respectively.
One the most according to claim 1 is applicable to state IV and above discharge use for diesel engine fall nitrogen oxygen spraying system, it is characterized in that: urea tank is provided with urea liquid level sensor and urea temperature sensor, urea liquid level sensor is connected with control unit for vehicle DCU by wire respectively with urea temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620431479.9U CN205591988U (en) | 2016-05-13 | 2016-05-13 | Be applicable to state IV and above emission diesel engine with falling nitrogen oxygen injection system |
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| CN201620431479.9U CN205591988U (en) | 2016-05-13 | 2016-05-13 | Be applicable to state IV and above emission diesel engine with falling nitrogen oxygen injection system |
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| CN205591988U true CN205591988U (en) | 2016-09-21 |
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| CN201620431479.9U Active CN205591988U (en) | 2016-05-13 | 2016-05-13 | Be applicable to state IV and above emission diesel engine with falling nitrogen oxygen injection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837486A (en) * | 2016-12-27 | 2017-06-13 | 潍柴动力空气净化科技有限公司 | Gas helps formula urea injection system and gas to help formula method for urea injection control |
-
2016
- 2016-05-13 CN CN201620431479.9U patent/CN205591988U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837486A (en) * | 2016-12-27 | 2017-06-13 | 潍柴动力空气净化科技有限公司 | Gas helps formula urea injection system and gas to help formula method for urea injection control |
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