CN215890151U - Commercial vehicle postprocessor - Google Patents
Commercial vehicle postprocessor Download PDFInfo
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- CN215890151U CN215890151U CN202121678132.1U CN202121678132U CN215890151U CN 215890151 U CN215890151 U CN 215890151U CN 202121678132 U CN202121678132 U CN 202121678132U CN 215890151 U CN215890151 U CN 215890151U
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- assembly
- air inlet
- air outlet
- mixer
- commercial vehicle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model relates to a commercial vehicle postprocessor, which comprises an air inlet assembly, a DPF diesel particle catcher assembly, a mixer assembly and an air outlet assembly which are connected in sequence; the gas inlet assembly, the DPF diesel particle catcher assembly, the mixer assembly and the gas outlet assembly are connected into a whole through a hoop, and a graphite gasket is arranged on the inner side of the hoop. The utility model has simple and convenient assembly, sectional maintenance, firm and reliable structure, good noise reduction effect and high tail gas conversion efficiency, and meets the diversified requirements of customers on the form and performance of the interface of the post processor and the performance requirement of the whole vehicle.
Description
Technical Field
The utility model relates to the technical field of vehicle postprocessors, in particular to a commercial vehicle postprocessor.
Background
The basic working principle of the post-processor is that the combustion process in a cylinder of the diesel engine is optimized, so that the emissions of carbon monoxide (CO), Hydrocarbon (HC), Particles (PM) and the like in the combustion exhaust gas are effectively controlled and meet the requirements of regulations, and finally, nitrogen oxides (NOx) with high content in the exhaust gas discharged by the engine are treated by a special vehicle-mounted post-treatment system so as to meet the requirements of the regulations. During the post-treatment process, the dosing unit can accurately inject the urea amount matched with the operation condition of the engine into the exhaust pipe according to the instruction given by the electronic control unit of the engine, and the ammonia and the nitrogen oxides decomposed from the urea are subjected to catalytic reduction reaction in the catalyst to finally generate harmless nitrogen (N2) and water (H2O). In the requirements of the six national regulations, an after-treatment device is divided into three units, namely a DOC unit, a DPF unit and an SCR unit and an ASC unit, and is used for treating tail gas discharged by an engine. The DOC has the main functions of oxidizing CO and HC into C02 and H20; secondly, oxidizing part of NO into NO2 to improve the SCR reaction speed; and thirdly, igniting the fuel oil which is injected into the post-treatment, and increasing the exhaust temperature to achieve DPF regeneration. The DPF has a main role of filtering carbon Particles (PM) stored in exhaust gas; secondly, under the normal working condition, part of carbon particles are burnt by the noble metal in the carbon particles. The main function of SCR is to reduce NO and NOx in the exhaust gas into N2 and H20. The main function of the ASC is to remove NH3 that leaks in the exhaust due to excessive urea injection or incomplete chemical reaction, and oxidize it to N2 and H2O.
However, the existing vehicle post-processor is adapted to the market change and meets the installation requirements of the whole vehicle, if the existing vehicle post-processor is fixed in a conventional mode, the positions of air inlet and air outlet are fixed on the end cover, and the whole vehicle is of a box type structure, the exhaust pipeline of a customer has new changes, the end cover connected with the air inlet pipe and the air outlet pipe needs to be opened again, the investment cost is huge, the conventional box type structure has large space limitation, the DOC, the DPF, the SCR and the ASC are required to be arranged, the exhaust back pressure and the insertion loss of a post-processing assembly are influenced, the standard requirements of the customer can not be met by designing, the subsequent maintenance and service are also very inconvenient, the diversified requirements of the customer on the interface form and the performance of the post-processor can not be met, and the performance requirements of the whole vehicle can not be met.
Disclosure of Invention
Aiming at the problems in the background technology, the utility model provides the commercial vehicle postprocessor which can meet the requirements of diversified postprocessor interface forms and performances, and has good noise reduction and noise reduction effects and high tail gas conversion efficiency.
The utility model is realized by the following technical scheme:
the commercial vehicle postprocessor comprises an air inlet assembly, a DPF diesel particle catcher assembly, a mixer assembly and an air outlet assembly which are sequentially connected; the diesel particulate filter is characterized in that the air inlet assembly, the DPF diesel particulate trap assembly, the mixer assembly and the air outlet assembly are connected into a whole through a hoop, and a graphite gasket is arranged on the inner side of the hoop.
The commercial car aftertreatment ware, wherein: and the outer surfaces of the air inlet assembly, the DPF diesel particle catcher assembly, the mixer assembly and the air outlet assembly are respectively provided with a heat shield.
The commercial car aftertreatment ware, wherein: the air inlet assembly is internally provided with an accommodating space which comprises an air inlet end cone, a connecting ring and a DOC carrier; the air inlet end cone is installed at the front end part of the air inlet assembly in a matching mode, and the front end of the air inlet assembly is connected with an air inlet pipe; the air inlet pipe is connected with an engine exhaust pipe; the connecting ring is installed at the rear end of the air inlet assembly in a matching mode and is connected with the DPF diesel particle catcher assembly; the DOC carrier is accommodated in the accommodating space inside the air inlet assembly.
The commercial car aftertreatment ware, wherein: the air inlet assembly further comprises a differential pressure sensor support, a temperature sensor seat and a differential pressure sensor seat which are arranged on the outer surface of the air inlet assembly.
The commercial car aftertreatment ware, wherein: the DPF diesel particle catcher assembly is internally provided with an accommodating space which comprises a DPF carrier and a catcher hump ring; the DPF carrier is accommodated in an accommodating space inside the DPF diesel particle catcher assembly; the trapper hump rings are a pair and are respectively arranged at the front end and the rear end of the DPF diesel particle trapper assembly.
The commercial car aftertreatment ware, wherein: the mixer assembly is internally provided with an accommodating space which comprises an upper half shell, a lower half shell, a mixer, an injector seat and an injector bracket; the upper half shell and the lower half shell form an inner space of the mixer assembly; the mixer is accommodated in the inner space of the mixer assembly; the injector seat is arranged outside the heat shield and used for installing the injector; the injector mount is disposed outside of the mixer assembly.
The commercial car aftertreatment ware, wherein: the mixer assembly also comprises a heat insulation support, a temperature sensor seat and a pressure difference sensor seat which are arranged on the corresponding outer surface of the mixer assembly.
The commercial car aftertreatment ware, wherein: the air outlet assembly is internally provided with an accommodating space which comprises an air outlet hump ring, an air outlet end cone, an SCR carrier and an SCR + ASC carrier; the hump ring is arranged at one end of the air outlet assembly connected with the mixer assembly, and is of a structure convenient for disassembly and assembly; the air outlet end cone is installed at the other end of the air outlet assembly and is provided with an air outlet connecting pipe and an NOx sensor seat; the air outlet connecting pipe is connected with an exhaust tail pipe of the post-processor; the NOx sensor base is connected with the NOx sensor; the SCR carrier and the SCR + ASC carrier are accommodated in an accommodating space inside the air outlet assembly.
Has the advantages that:
the commercial vehicle postprocessor has simple and reasonable structural design and convenient assembly, the air inlet assembly, the DPF diesel particle catcher assembly, the mixer assembly and the air outlet assembly are connected into a whole through the graphite gasket and the clamp, and the air inlet assembly and the air outlet assembly are connected through the clamp and can rotate freely within 360 degrees of the axis. Each sub-assembly is out of work, so that the maintenance and the updating are convenient, and the diversified requirements of customers on the form and the performance of the interface of the post processor and the performance requirements of the whole vehicle are met. The utility model has simple and convenient assembly, sectional maintenance, firm and reliable structure, good noise reduction and noise reduction effects and high tail gas conversion efficiency.
Drawings
FIG. 1 is a front view of a commercial vehicle aftertreatment system in accordance with the present invention;
fig. 2 is a left side view of the inventive commercial vehicle aftertreatment device.
Detailed Description
As shown in fig. 1 to 2, the commercial vehicle postprocessor comprises an air inlet assembly 1, a DPF diesel particle trap assembly 2, a mixer assembly 3, an air outlet assembly 4, a hoop 5 and a graphite gasket 6, wherein the air inlet assembly 1, the DPF diesel particle trap assembly 2, the mixer assembly 3 and the air outlet assembly 4 are sequentially connected into a whole through the hoop 5.
One end of the air inlet assembly 1 is externally connected with an exhaust pipe, the other end of the air inlet assembly is connected with the DPF diesel particle catcher assembly 2, and the air inlet assembly is internally provided with an accommodating space which comprises an air inlet end cone 11, a connecting ring 12, a first heat insulating cover 13, a differential pressure sensor support 14 and a DOC carrier 15;
the air inlet end cone 11 is arranged at the front end part of the air inlet assembly 1 in a matching way, and the front end of the air inlet end cone 11 is connected with an air inlet pipe 111; the air inlet pipe 111 is connected with an engine exhaust pipe, and adopts a brand new spinning process;
the connecting ring 12 is arranged at the rear end of the air inlet assembly 1 in a matching way and is connected with the DPF diesel particle catcher assembly 2; the connecting ring 12 is structured to facilitate disassembly and assembly with other subassemblies;
the first heat shield 13 is internally provided with heat insulation cotton, is arranged on the outer surface of the air inlet assembly 1 and is used for isolating the high temperature on the surface of the postprocessor;
the differential pressure sensor support 14 is arranged on the outer surface of the air inlet assembly 1 and is used for installing a support of the differential pressure sensor and monitoring the pressure difference of air flow passing through a carrier.
The DOC carrier 15 is accommodated in the accommodating space inside the air intake assembly 1, and the DOC carrier 15 functions as: oxidizing CO and HC to C02 and H20; oxidizing part of the NO into NO2 to improve the SCR reaction speed; and igniting the post-injected fuel for post-treatment;
in order to facilitate installation of the temperature sensor and the differential pressure sensor, a temperature sensor seat 16 and a first differential pressure sensor seat 17 are installed on the corresponding outer surface of the air intake assembly 1, and the first differential pressure sensor seat 17 is a seat for installing a differential pressure sensor high-pressure pipe.
One end of the DPF diesel particle catcher assembly 2 is connected with the air inlet assembly 2, the other end is connected with the mixer assembly 4, and the interior of the DPF diesel particle catcher assembly 2 is provided with a containing space which comprises a DPF carrier 21, a catcher hump ring 22, a second heat insulation cover 23,
The DPF carrier 21 is accommodated in the accommodating space inside the DPF diesel particulate trap assembly 2, and the DPF carrier 21 functions as: filtering carbon Particles (PM) stored in the exhaust gas; and under normal operating conditions, part of the carbon particles are burnt by the noble metal in the carbon particles;
the pair of catcher hump rings 22 are respectively arranged at the front end and the rear end of the DPF diesel particle catcher assembly 2; the structure of the catcher hump ring 22 facilitates disassembly and assembly with other subassemblies;
the second heat shield 23 has heat insulation cotton therein, and is covered on the outer surface of the DPF diesel particulate trap assembly 2 for isolating the high temperature on the surface of the aftertreatment device.
One end of the mixer assembly 3 is connected with the DPF diesel particle catcher assembly 2, the other end is connected with the air outlet assembly 4, and the mixer assembly 3 is internally provided with an accommodating space which comprises an upper half shell 31, a lower half shell 32, a mixer 33, a third heat insulation cover 34, an injector seat 35, a heat insulation support 36, an injector support 37, a temperature sensor seat 38 and a pressure difference sensor seat 39;
the upper half shell 31 and the lower half shell 32 constitute an inner space of the mixer assembly 3;
the mixer 33 is accommodated in the inner space of the mixer assembly 3 and mainly functions to promote the urea of the system injected into the aftertreatment to be fully mixed with the tail gas;
the third heat shield 34 is internally provided with heat insulation cotton and is covered on the outer surface of the mixer assembly 3 for isolating the surface temperature of the post processor;
an injector seat 35 is mounted outside the third heat shield 34 for mounting an injector; meanwhile, the ejector bracket 37 is arranged to fix the ejector, so that the failure risks of ejector fracture and the like caused by vibration in the subsequent running process of the whole vehicle are avoided;
the heat insulation bracket 36 is arranged outside the mixer assembly 3 and beside the injector bracket 37, and is used for installing an outer heat insulation plate to play a role in beauty and heat insulation;
the temperature sensor seat 38 and the second differential pressure sensor seat 39 are mounted on the corresponding outer surfaces of the mixer assembly 3; the second differential pressure sensor holder 39 is used for mounting a holder of a low pressure pipe of the differential pressure sensor.
One end of the air outlet assembly 4 is connected with the mixer assembly 3, the other end of the air outlet assembly is directly connected with an exhaust tail pipe outwards, and an accommodating space is arranged in the air outlet assembly and comprises an air outlet hump ring 41, an air outlet end cone 42, a fourth heat shield 43, an SCR carrier 44 and an SCR + ASC carrier 45;
the hump ring 41 is arranged at one end of the air outlet assembly 4 connected with the mixer assembly 3 and has a structure convenient for disassembly and assembly;
the air outlet end cone 42 is arranged at the other end of the air outlet assembly 4; an air outlet connecting pipe 421 and an NOx sensor seat 422 are arranged on the air outlet end cone 42; the air outlet connecting pipe 421 is connected with an exhaust tail pipe of the post-processor, and the purified tail gas is discharged into the atmosphere; the NOx sensor seat 422 is connected with the NOx sensor and is used for detecting the reading value of NOx in the purified tail gas to see whether the emission meets the requirements of the regulations;
the fourth heat shield 43 is internally provided with heat insulation cotton and is covered on the outer surface of the air outlet assembly 4 for isolating the high temperature on the surface of the postprocessor;
the SCR carrier 44 and the SCR + ASC carrier 45 are accommodated in the accommodating space inside the air outlet assembly 4; the SCR carrier 44 mainly functions to remove NO and NO in the exhaust gasXReduction to N2、H20; the primary function of the SCR + ASC carrier 45 is to remove NH that may be slipped from the exhaust due to excessive urea injection or incomplete chemical reaction3By oxidation to N2And H2O。
The plurality of hoops 5 are respectively arranged at the sequential connection positions of the air inlet assembly 1, the DPF diesel particle catcher assembly 2, the mixer assembly 3 and the air outlet assembly 4 so as to realize detachable connection and fixation;
the graphite gasket 6 is matched with the clamp 5 and arranged between the inner side of the clamp 5 and the air inlet assembly 1, the DPF diesel particle catcher assembly 2, the mixer assembly 3 and the air outlet assembly 4.
The commercial vehicle postprocessor comprises an air inlet assembly, a DPF diesel particle catcher assembly, a mixer assembly and an air outlet assembly which are connected into a whole through a graphite gasket and a clamp, wherein the air inlet assembly 1 and the air outlet assembly 4 can rotate freely within 360 degrees of an axis; each sub-assembly is out of work, and can be maintained in a segmented mode, so that the maintenance and the updating are facilitated.
The commercial vehicle postprocessor is suitable for engines in all horsepower sections of DDI75 CN6, meets thermodynamic requirements, has the surface temperature lower than 200 ℃, and has the appearance meeting the requirements of DFCVCJ 2008-2013. The insertion loss of the commercial vehicle postprocessor is more than or equal to 22dB (A), the exhaust back pressure under the rated working condition is less than or equal to 25KPa, the sealing pressure is 0.3bar, the leakage rate is not more than 20L/min, the emission performance meets the requirements of GB 17691-2018, and the durability meets the requirements of GB 20890-2018.
The test proves that: the commercial vehicle postprocessor has the characteristics of high conversion efficiency, good airflow mixing uniformity, low exhaust back pressure and small power loss.
The commercial vehicle postprocessor has the advantages of simple and reasonable structural design, good airflow mixing uniformity, high tail gas conversion efficiency, firm structure and stable and reliable use.
Claims (8)
1. A commercial vehicle postprocessor is characterized in that: the post-processor comprises an air inlet assembly, a DPF diesel particle catcher assembly, a mixer assembly and an air outlet assembly which are connected in sequence; the gas inlet assembly, the DPF diesel particle catcher assembly, the mixer assembly and the gas outlet assembly are connected into a whole through the clamp respectively, and the inner side of the clamp is provided with a graphite gasket.
2. The commercial vehicle aftertreatment device of claim 1, wherein: and the outer surfaces of the air inlet assembly, the DPF diesel particle catcher assembly, the mixer assembly and the air outlet assembly are respectively provided with a heat shield.
3. The commercial vehicle aftertreatment device of claim 2, wherein: the air inlet assembly is internally provided with an accommodating space which comprises an air inlet end cone, a connecting ring and a DOC carrier;
the air inlet end cone is installed at the front end part of the air inlet assembly in a matching mode, and the front end of the air inlet assembly is connected with an air inlet pipe; the air inlet pipe is connected with an engine exhaust pipe;
the connecting ring is installed at the rear end of the air inlet assembly in a matching mode and is connected with the DPF diesel particle catcher assembly;
the DOC carrier is accommodated in the accommodating space inside the air inlet assembly.
4. The commercial vehicle aftertreatment device of claim 3, wherein: the air inlet assembly further comprises a differential pressure sensor support, a temperature sensor seat and a differential pressure sensor seat which are arranged on the outer surface of the air inlet assembly.
5. The commercial vehicle aftertreatment device of claim 2, wherein: the DPF diesel particle catcher assembly is internally provided with an accommodating space which comprises a DPF carrier and a catcher hump ring;
the DPF carrier is accommodated in an accommodating space inside the DPF diesel particle catcher assembly;
the trapper hump rings are a pair and are respectively arranged at the front end and the rear end of the DPF diesel particle trapper assembly.
6. The commercial vehicle aftertreatment device of claim 2, wherein: the mixer assembly is internally provided with an accommodating space which comprises an upper half shell, a lower half shell, a mixer, an injector seat and an injector bracket;
the upper half shell and the lower half shell form an inner space of the mixer assembly;
the mixer is accommodated in the inner space of the mixer assembly;
the injector seat is arranged outside the heat shield and used for installing the injector; the injector mount is disposed outside of the mixer assembly.
7. The commercial vehicle aftertreatment device of claim 6, wherein: the mixer assembly further comprises a heat insulation support, a temperature sensor seat and a pressure difference sensor seat which are arranged on the outer surface corresponding to the mixer assembly.
8. The commercial vehicle aftertreatment device of claim 2, wherein: the air outlet assembly is internally provided with an accommodating space which comprises an air outlet hump ring, an air outlet end cone, an SCR carrier and an SCR + ASC carrier;
the hump ring is arranged at one end of the air outlet assembly connected with the mixer assembly, and is of a structure convenient for disassembly and assembly;
the air outlet end cone is installed at the other end of the air outlet assembly and is provided with an air outlet connecting pipe and an NOx sensor seat; the air outlet connecting pipe is connected with an exhaust tail pipe of the post-processor; the NOx sensor base is connected with the NOx sensor;
the SCR carrier and the SCR + ASC carrier are accommodated in an accommodating space inside the air outlet assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121678132.1U CN215890151U (en) | 2021-07-23 | 2021-07-23 | Commercial vehicle postprocessor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121678132.1U CN215890151U (en) | 2021-07-23 | 2021-07-23 | Commercial vehicle postprocessor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215890151U true CN215890151U (en) | 2022-02-22 |
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ID=80344342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121678132.1U Active CN215890151U (en) | 2021-07-23 | 2021-07-23 | Commercial vehicle postprocessor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215890151U (en) |
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2021
- 2021-07-23 CN CN202121678132.1U patent/CN215890151U/en active Active
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