CN106988838B - Exhaust aftertreatment pipeline system of internal combustion engineering machinery - Google Patents
Exhaust aftertreatment pipeline system of internal combustion engineering machinery Download PDFInfo
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- CN106988838B CN106988838B CN201710307599.7A CN201710307599A CN106988838B CN 106988838 B CN106988838 B CN 106988838B CN 201710307599 A CN201710307599 A CN 201710307599A CN 106988838 B CN106988838 B CN 106988838B
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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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
-
- 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
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
-
- 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
- F01N2610/1486—Means to prevent the substance from freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a tail gas post-treatment pipeline system of an internal combustion engineering machine, wherein the front end of the pipeline system is provided with a total water inlet pipe, one end of the total water inlet pipe is in through connection with a cooling water pipeline of the internal combustion engine, warm water in the cooling water pipeline of the internal combustion engine is conveyed to a urea box, and urea in the urea box is circularly heated; meanwhile, warm water in a cooling water pipeline of the internal combustion engine is conveyed to the DRT pipe, and a urea injection device in the DRT pipe 3 in a high-temperature exhaust system of the internal combustion engine is cooled. The rear end of the cooling water pipeline is communicated with the water return pipeline of the cooling water pipeline of the internal combustion engine from the water outlet of the DRT pipe, so that a closed circulation system of the cooling water pipeline is formed. The invention improves the reliability of the tail gas treatment device of the internal combustion engineering machinery, ensures that urea solution for chemical reaction can be timely and effectively supplied to the post-treatment device, and ensures that the discharged tail gas can meet the standard requirements. The invention has clear pipeline arrangement, reliable pipeline connection and easy disassembly and assembly.
Description
Technical Field
The invention belongs to the field of internal combustion engineering machinery, and particularly relates to an exhaust aftertreatment pipeline system of an internal combustion engineering machinery.
Background
In order to control the nitrogen oxide in the tail gas, most internal combustion engine manufacturers adopt an SCR technology route, wherein an SCR device is used for performing a reduction reaction on the gas obtained by mixing the nitrogen oxide with urea solution under the action of a catalyst, so that the nitrogen oxide is converted into nitrogen and water.
Because the urea solution is crystallized in a low-temperature environment to cause pipeline blockage, the urea pump can not effectively provide the urea solution for chemical reaction, and the emission is not up to standard; and the spraying device of the DRT pipe for urea solution is connected in series in the exhaust pipeline system, and the temperature of the spraying device is very high, so that the reliability of the spraying device is ensured, and the spraying device needs to be cooled.
The post-treatment system comprises three sections of urea pipelines, and three faults of pipeline blockage, pipeline leakage and pipeline bending are easy to occur. Generally, due to the blockage of a pipeline caused by urea crystallization or poor urea quality, urea injection and pressure establishment can be influenced, and emission is not up to standard; the type of the pipeline interface or the interface is not sealed well, and the pipeline is aged or worn, so that urea leakage is caused; the pipeline bending can cause urea pressure building failure or injection failure, so that emission does not reach the standard.
The heating system comprises water heating and electric heating, wherein the electric heating has higher failure rate due to more relays, more wire harnesses and more heating resistance wires. The method is mainly characterized by relay damage, heating resistance wire open circuit, wire harness open circuit, short circuit and the like. Due to mechanical faults of the electromagnetic valve, such as abrasion, blocking and the like, the heating failure of the urea box can be caused, the temperature of the urea box is too low, the continuous heating of the urea box can be caused, the temperature of the urea is too high, and the emission is not up to standard due to volatilization of the urea.
Disclosure of Invention
The invention aims to solve the problems and provides an exhaust aftertreatment pipeline system for an internal combustion engineering machine.
An exhaust gas aftertreatment pipeline system of an internal combustion engineering machine comprises a urea box 1, a urea pump 2, a DRT pipe 3 and a cooling water pipeline 4. The urea pump 2 sucks urea from the urea tank 1 and delivers it to the DRT pipe 3. The front end of the cooling water pipeline 4 is in through connection with the cooling water pipeline of the internal combustion engine, warm water in the cooling water pipeline of the internal combustion engine is conveyed to the urea box 1 to circularly heat urea in the urea box, and meanwhile warm water in the cooling water pipeline of the internal combustion engine is conveyed to the DRT pipe 3 to cool the urea injection device in the DRT pipe 3 in a high-temperature exhaust system of the internal combustion engine. The rear end of the cooling water pipeline 4 is communicated with a water return pipeline of the cooling water pipeline of the internal combustion engine from the water outlet of the DRT pipe 3, so that a closed circulation system of the cooling water pipeline 4 is formed. A temperature control electromagnetic valve 49 is arranged in the cooling water pipeline 4, and the temperature control electromagnetic valve 49 controls the temperature of warm water entering the urea tank 1.
The further defined technical scheme is as follows:
the top of the urea box 1 is provided with a pipeline integrated cover, and the pipeline integrated cover is provided with a water inlet port 11, a water outlet port 12, a urea suction port 13, a urea return port 14 and a temperature and urea liquid level sensor 15. The water inlet port 11, the water outlet port 12 and the circulating cooling water channel in the urea box 1 are connected in a penetrating way; the urea suction port 13 and the urea return port 14 are connected with the inlet and the outlet of the urea pump 2 in a penetrating way. The temperature and urea level sensor 15 senses a temperature signal of urea in the urea tank 1 and transmits the temperature signal to the temperature control solenoid valve 49. The urea tank 1 is provided with a hoop 16 and a bracket 17, wherein the hoop 16 fixes the urea tank 1 on the bracket 17 and is mounted on a frame of the internal combustion engineering machine through the bracket 17.
The urea pump 2 is provided with a urea suction pipe 21, a urea return pipe 22, a urea supply pipe 23 and a fixing bracket 24. The urea suction pipe 21 and the urea return pipe 22 are respectively connected with the urea suction port 13 and the urea return port 14 in a penetrating way, and the urea supply pipe 23 is connected with the urea inlet of the DRT pipe 3 in a penetrating way. The urea pump 2 is fixed to a fixed bracket 24 and is connected to the frame of the internal combustion engine machine by means of said fixed bracket 24.
The DRT pipe 3 is provided with a DRT pipe water inlet 31, a DRT pipe water outlet 32 and a DRT pipe urea inlet 33. The DRT pipe water inlet 31 is communicated with the cooling water pipeline of the internal combustion engine, the DRT pipe water outlet 32 is communicated with the water return pipeline of the cooling water pipeline of the internal combustion engine, and the DRT pipe urea inlet 33 is communicated with the urea supply pipe 23.
The cooling water pipeline 4 is provided with a total water inlet pipe 41, one end of the total water inlet pipe 41 is in through connection with the cooling water pipeline of the internal combustion engine, the other end of the total water inlet pipe 41 is connected with one port of a first Y-shaped joint 47, and the other two ports of the first Y-shaped joint 47 are respectively in through connection with the communicating pipe 42 and the urea box water inlet pipe 43. The other port of the communicating pipe 42 is connected with the port of the urea box water outlet pipe 44 and the two ports of the second Y-shaped joint 48 in a penetrating way, the other port of the second Y-shaped joint 48 is connected with one end of the DRT pipe water inlet pipe 45 in a penetrating way, and the other end of the DRT pipe water inlet pipe 45 is connected with the DRT pipe water inlet in a penetrating way. The water outlet of the DRT pipe is communicated with one end of a water outlet pipe 46 of the DRT pipe, and the other end of the water outlet pipe 46 of the DRT pipe is communicated with a cooling water pipeline of the internal combustion engine.
A temperature control electromagnetic valve 49 is connected in series between the urea tank water inlet pipe 43.
The cooling water pipeline 4 is provided with a pipeline fixing frame 401, and the cooling water pipeline 4 is fixed on the engine body of the internal combustion engine through the pipeline fixing frame 401.
The urea pump 2 is an electric control pump and is provided with a forward and reverse switch, when the internal combustion engine is flameout, the reverse switch is opened, and urea solution which is not consumed in time in a pipeline is sucked back to the urea tank.
The beneficial technical effects of the invention are as follows:
(1) The invention utilizes the warm water in the cylinder sleeve of the internal combustion engine to heat the urea solution in the urea box, thereby avoiding that the post-treatment device can not effectively treat the tail gas due to the crystallization of the urea solution in a low-temperature environment.
(2) The temperature control electromagnetic valve is arranged to control the real-time on-off or opening of the pipeline according to the temperature requirement and control the flow of the cooling liquid.
(3) The warm water in the cooling water pipeline system cools the DRT pipe, so that the reliability of the spraying device is ensured, and the connecting joint is a plug-and-play quick connector, so that the connection and maintenance are easy.
(4) The urea pump used in the invention is an electric control pump, when the internal combustion engine is flameout, the controller controls the urea pump to rotate reversely, and the urea solution which is not consumed in time in the pipeline is sucked back to the urea tank.
(5) The invention provides an arrangement scheme of an internal combustion engineering machinery aftertreatment pipeline system, which has clear pipeline arrangement, reliable pipeline connection and easy disassembly and assembly.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
FIG. 2 is a schematic illustration of a urea tank accessory.
Fig. 3 is a schematic diagram of the pipe joint structure of the DRT pipe.
Fig. 4 is a schematic diagram of a cooling water pipeline.
Fig. 5 is a schematic diagram of a pipeline structure of the DRT pipe.
Number in the upper diagram:
the urea box 1, the water inlet interface 11, the water outlet interface 12, the urea suction interface 13, the urea return interface 14, the temperature and urea liquid level sensor 15, the anchor ear 16 and the bracket 17;
urea pump 2, urea suction pipe 21, urea return pipe 22, urea supply pipe 23, and fixing bracket 24;
a DRT pipe 3, a DRT pipe water inlet 31, a DRT pipe water outlet 32 and a DRT pipe urea inlet 33;
a cooling water pipeline 4, a total water inlet pipe 41, a communicating pipe 42, a urea box water inlet pipe 43, a urea box water outlet pipe 44, a DRT pipe water inlet pipe 45, a DRT pipe water outlet pipe 46, a first Y-shaped joint 47, a second Y-shaped joint 48, a temperature control electromagnetic valve 49 and a pipeline fixing frame 401.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
Examples
Referring to fig. 1, an exhaust gas aftertreatment pipeline system of an internal combustion engineering machine comprises a urea tank 1, a urea pump 2, a DRT pipe 3 and a cooling water pipeline 4.
Referring to fig. 2, the top of the urea tank 1 is provided with a pipeline integration cover, and the pipeline integration cover is provided with a water inlet port 11, a water outlet port 12, a urea suction port 13, a urea return port 14 and a temperature and urea liquid level sensor 15. The water inlet port 11, the water outlet port 12 are connected with a circulating cooling water path in the urea box 1 in a penetrating way. The urea suction port 13 and the urea return port 14 are connected with the inlet and the outlet of the urea pump 2 in a penetrating way. The temperature and urea level sensor 15 senses a temperature signal of urea in the urea tank 1 and transmits the temperature signal to the temperature control solenoid valve 49. The urea tank 1 is provided with a hoop 16 and a bracket 17, wherein the hoop 16 fixes the urea tank 1 on the bracket 17 and is mounted on a frame of the internal combustion engineering machine through the bracket 17.
Referring to fig. 3, the DRT pipe 3 is provided with a DRT pipe water inlet 31, a DRT pipe water outlet 32, and a DRT pipe urea inlet 33. The DRT pipe water inlet 31 is communicated with the cooling water pipeline of the internal combustion engine, the DRT pipe water outlet 32 is communicated with the water return pipeline of the cooling water pipeline of the internal combustion engine, and the DRT pipe urea inlet 33 is communicated with the urea supply pipe 23.
Referring to fig. 4, the cooling water pipeline 4 is provided with a total water inlet pipe 41, one end of the total water inlet pipe 41 is connected with the cooling water pipeline of the internal combustion engine in a penetrating way, the other end of the total water inlet pipe 41 is connected with one port of a first Y-shaped joint 47, and the other two ports of the first Y-shaped joint 47 are respectively connected with the communicating pipe 42 and the urea box water inlet pipe 43 in a penetrating way. The other port of the communicating pipe 42 is connected with the port of the urea box water outlet pipe 44 and the two ports of the second Y-shaped joint 48 in a penetrating way, the other port of the second Y-shaped joint 48 is connected with one end of the DRT pipe water inlet pipe 45 in a penetrating way, and the other end of the DRT pipe water inlet pipe 45 is connected with the DRT pipe water inlet in a penetrating way. The water outlet of the DRT pipe is communicated with one end of a water outlet pipe 46 of the DRT pipe, and the other end of the water outlet pipe 46 of the DRT pipe is communicated with a cooling water pipeline of the internal combustion engine. A temperature control electromagnetic valve 49 is connected in series between the urea tank water inlet pipe 43.
The cooling water pipeline 4 is provided with a pipeline fixing frame 401, the pipeline fixing frames 401 are arranged at intervals of 150 mm-200 mm, and the cooling water pipeline 4 is fixed on the engine body of the internal combustion engine through the pipeline fixing frames 401.
Referring to fig. 5, the urea pump 2 is provided with a urea suction pipe 21, a urea return pipe 22, a urea supply pipe 23 and a fixing bracket 24; the urea suction pipe 21 and the urea return pipe 22 are respectively connected with the urea suction port 13 and the urea return port 14 in a penetrating way, and the urea supply pipe 23 is connected with the urea inlet of the DRT pipe 3 in a penetrating way. The urea pump 2 is fixed to a fixed bracket 24 and is connected to the frame of the internal combustion engine machine by means of said fixed bracket 24.
The urea pump 2 is an electric control pump and is provided with a forward and reverse switch, when the internal combustion engine is flameout, the reverse switch is turned on, and urea solution which is not timely consumed in a pipeline is sucked back to the urea box, so that the urea solution is prevented from crystallizing in the pipeline, and the pipeline is prevented from being blocked.
In operation, the urea pump 2 draws urea from the urea tank 1 and delivers it to the DRT pipe 3. One end of a total water inlet pipe 41 at the front end of the cooling water pipeline 4 is connected with an internal combustion engine cooling water pipeline in a penetrating way, the temperature of cooling water is 80-90 degrees, warm water in the internal combustion engine cooling water pipeline is conveyed to the urea box 1 to circularly heat urea in the urea box, warm water in the internal combustion engine cooling water pipeline is conveyed to the DRT pipe 3, and a urea injection device positioned in the DRT pipe 3 (the temperature is generally 500-600 degrees) in a high-temperature exhaust system of the internal combustion engine is cooled. The rear end of the cooling water pipeline 4 is communicated with a water return pipeline of the cooling water pipeline of the internal combustion engine from the water outlet of the DRT pipe 3, so that a closed circulation system of the cooling water pipeline 4 is formed. A temperature control electromagnetic valve 49 is arranged in the cooling water pipeline 4, and the temperature control electromagnetic valve 49 controls the temperature of warm water entering the urea tank 1.
The above is not intended to limit the structure, shape, or any form of the present invention. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (4)
1. An internal combustion engineering machinery tail gas aftertreatment pipe system which is characterized in that: comprises a urea box (1), a urea pump (2), a DRT pipe (3) and a cooling water pipeline (4);
the top of the urea box (1) is provided with a pipeline integrated cover, and the pipeline integrated cover is provided with a water inlet interface (11), a water outlet interface (12), a urea suction interface (13), a urea return interface (14) and a temperature and urea liquid level sensor (15); the water inlet interface (11), the water outlet interface (12) are connected with a circulating cooling water channel in the urea box (1) in a penetrating way; the urea suction interface (13) and the urea return interface (14) are in through connection with the inlet and the outlet of the urea pump (2); the temperature and urea liquid level sensor (15) senses a temperature signal of urea in the urea tank (1) and transmits the temperature signal to the temperature control electromagnetic valve (49); the urea box (1) is provided with a hoop (16) and a bracket (17), and the hoop (16) is used for fixing the urea box (1) on the bracket (17) and is arranged on a frame of the internal combustion engineering machine through the bracket (17);
the urea pump (2) is provided with a urea suction pipe (21), a urea return pipe (22), a urea supply pipe (23) and a fixed bracket (24); the urea suction pipe (21) and the urea return pipe (22) are respectively and communicated with the urea suction interface (13) and the urea return interface (14), and the urea supply pipe (23) is communicated with a urea inlet of the DRT pipe (3); the urea pump (2) is fixed on the fixed bracket (24) and is connected to the frame of the internal combustion engineering machinery through the fixed bracket (24);
the DRT pipe (3) is provided with a DRT pipe water inlet (31), a DRT pipe water outlet (32) and a DRT pipe urea inlet (33); the DRT pipe water inlet (31) is communicated with the cooling water pipeline of the internal combustion engine, the DRT pipe water outlet (32) is communicated with the water return pipeline of the cooling water pipeline of the internal combustion engine, and the DRT pipe urea inlet (33) is communicated with the urea supply pipe (23);
the cooling water pipeline (4) is provided with a total water inlet pipe (41), one end of the total water inlet pipe (41) is connected with the cooling water pipeline of the internal combustion engine in a penetrating way, the other end of the total water inlet pipe is connected with one port of the first Y-shaped joint (47), and the other two ports of the first Y-shaped joint (47) are respectively connected with the communicating pipe (42) and the urea box water inlet pipe (43) in a penetrating way; the other port of the communicating pipe (42) is in through connection with the port of the urea box water outlet pipe (44) and the two ports of the second Y-shaped joint (48), the other port of the second Y-shaped joint (48) is in through connection with one end of the DRT pipe water inlet pipe (45), and the other end of the DRT pipe water inlet pipe (45) is in through connection with the DRT pipe water inlet; the water outlet of the DRT pipe is communicated with one end of a water outlet pipe (46) of the DRT pipe, and the other end of the water outlet pipe (46) of the DRT pipe is communicated with a cooling water pipeline of the internal combustion engine;
the urea pump (2) sucks urea from the urea tank (1) and conveys the urea to the DRT pipe (3); the front end of the cooling water pipeline (4) is in through connection with the cooling water pipeline of the internal combustion engine, warm water in the cooling water pipeline of the internal combustion engine is conveyed to the urea box (1), urea in the urea box is circularly heated, meanwhile, warm water in the cooling water pipeline of the internal combustion engine is conveyed to the DRT pipe (3), and a urea injection device in the DRT pipe (3) in a high-temperature exhaust system of the internal combustion engine is cooled; the rear end of the cooling water pipeline (4) is communicated with a water return pipeline of the cooling water pipeline of the internal combustion engine from the water outlet of the DRT pipe (3) to form a closed circulation system of the cooling water pipeline (4); a temperature control electromagnetic valve (49) is arranged in the cooling water pipeline (4), and the temperature control electromagnetic valve (49) controls the flow of warm water entering the urea box (1).
2. An exhaust aftertreatment pipeline system for an internal combustion engine machine according to claim 1, wherein: a temperature control electromagnetic valve (49) is connected in series between the urea box water inlet pipe (43).
3. An exhaust aftertreatment pipeline system for an internal combustion engine machine according to claim 1, wherein: the cooling water pipeline (4) is provided with a pipeline fixing frame (401), and the cooling water pipeline (4) is fixed on the engine body of the internal combustion engine through the pipeline fixing frame (401).
4. An exhaust aftertreatment pipeline system for an internal combustion engine machine according to claim 1, wherein: the urea pump (2) is an electric control pump and is provided with a forward and reverse switch, when the internal combustion engine is flameout, the reverse switch is turned on, and urea solution which is not consumed in time in a pipeline is sucked back to the urea tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710307599.7A CN106988838B (en) | 2017-05-03 | 2017-05-03 | Exhaust aftertreatment pipeline system of internal combustion engineering machinery |
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| CN201710307599.7A CN106988838B (en) | 2017-05-03 | 2017-05-03 | Exhaust aftertreatment pipeline system of internal combustion engineering machinery |
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| CN106988838A CN106988838A (en) | 2017-07-28 |
| CN106988838B true CN106988838B (en) | 2023-07-25 |
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| CN107701269A (en) * | 2017-10-10 | 2018-02-16 | 广西玉柴机器股份有限公司 | Diesel engine post-processing system with hot type blue tube road |
| CN114215629B (en) * | 2021-12-02 | 2023-01-31 | 江铃汽车股份有限公司 | Emptying method of electronic control type urea injection system |
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| US9494083B2 (en) * | 2009-12-21 | 2016-11-15 | General Electric Company | Emissions control systems and methods |
| CN101798946B (en) * | 2010-02-23 | 2012-12-26 | 中国人民解放军军事交通学院 | Device and method for adding diesel urea solution |
| CN102840014A (en) * | 2011-06-20 | 2012-12-26 | 杭州银轮科技有限公司 | Air-assisted injection system for diesel engine urea after-treatment SCR (Selective Catalytic Reduction) system |
| CN203515743U (en) * | 2013-10-08 | 2014-04-02 | 潍柴动力股份有限公司 | Urea pump water heating device for aftertreatment of engine tail gas |
| CN106523094A (en) * | 2016-12-29 | 2017-03-22 | 雷沃重工股份有限公司 | Control device for adjusting SCR temperature and agricultural machinery |
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