CN111625958B - Method, equipment, storage medium and device for testing automobile exhaust device - Google Patents
Method, equipment, storage medium and device for testing automobile exhaust device Download PDFInfo
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- CN111625958B CN111625958B CN202010452025.0A CN202010452025A CN111625958B CN 111625958 B CN111625958 B CN 111625958B CN 202010452025 A CN202010452025 A CN 202010452025A CN 111625958 B CN111625958 B CN 111625958B
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- 238000012360 testing method Methods 0.000 title claims abstract description 131
- 238000000034 method Methods 0.000 title claims description 22
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 310
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 310
- 239000011593 sulfur Substances 0.000 claims abstract description 310
- 239000000654 additive Substances 0.000 claims abstract description 52
- 230000000996 additive effect Effects 0.000 claims abstract description 49
- 238000002474 experimental method Methods 0.000 claims abstract description 38
- 230000008929 regeneration Effects 0.000 claims description 83
- 238000011069 regeneration method Methods 0.000 claims description 83
- 239000010705 motor oil Substances 0.000 claims description 63
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 58
- 229910052799 carbon Inorganic materials 0.000 claims description 58
- 239000000295 fuel oil Substances 0.000 claims description 45
- 239000000446 fuel Substances 0.000 claims description 23
- 238000010998 test method Methods 0.000 claims description 12
- 238000009825 accumulation Methods 0.000 description 26
- 238000006477 desulfuration reaction Methods 0.000 description 25
- 230000023556 desulfurization Effects 0.000 description 25
- 239000002245 particle Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical group [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 239000004071 soot Substances 0.000 description 5
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 239000000306 component Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000005987 sulfurization reaction Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/10—Services
- G06Q50/26—Government or public services
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/02—Reliability analysis or reliability optimisation; Failure analysis, e.g. worst case scenario performance, failure mode and effects analysis [FMEA]
Abstract
The invention relates to the technical field of automobile reliability testing, and discloses a testing method, equipment, a storage medium and a device of an automobile tail gas device. According to the invention, experimental sulfur content information of the automobile exhaust device flowing in a unit sulfur-resistant period in an automobile experimental platform is obtained; comparing the experimental sulfur content information with target sulfur content information, and adjusting the content of the sulfur additive in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information; and carrying out sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information, so that the experimental sulfur content information in the automobile experiment platform can reach the optimal sulfur content by adjusting the sulfur additive content in the automobile exhaust device, and the reliability realization flexibility of the aftertreatment system is improved.
Description
Technical Field
The invention relates to the technical field of automobile reliability testing, in particular to a testing method, equipment, a storage medium and a device of an automobile tail gas device.
Background
With the upgrading of emission regulations, the requirements on the purification capacity outside the engine are higher and higher, and the aftertreatment system of the automobile must be adaptively upgraded or changed. Meanwhile, the requirements on the reliability of an after-treatment system are further improved by providing an emission quality guarantee period. The nitrogen oxide storage reduction catalyst (NOx Storage Catalyst, NSC) is a post-treatment device for reducing the NOx emission of an engine by periodically adsorbing and desorbing NOx, the core component of the post-treatment device is BaCO3, and the NOx is adsorbed, and meanwhile SO2 and SO3 in tail gas are also adsorbed, SO that BaCO3 is converted into BaSO4, the conversion capability of the NSC is reduced, therefore, the NSC needs to be desulfurized periodically, the desulfurization can be realized by adjusting the working condition of the engine, and a large amount of reducing gases such as CO, H2, HC and the like are generated in the tail gas by periodically adjusting the parameters such as the excess air coefficient of the engine, and meanwhile, the NSC inlet needs to be ensured to be above 680 ℃, SO that the BaSO4 can be reduced into BaCO3.
However, the reliability of the aftertreatment system is obtained mainly by monitoring the catalytic capability of the nitrogen oxide storage reduction catalyst, and a more flexible reliability test cannot be performed on the aftertreatment system.
Disclosure of Invention
The invention mainly aims to provide a test method, test equipment, test storage medium and test device for an automobile exhaust device, and aims to improve the flexibility of reliability test of an aftertreatment system.
In order to achieve the above object, the present invention provides a method for testing an automobile exhaust device, the method for testing an automobile exhaust device comprising the steps of:
obtaining experimental sulfur content information of the unit sulfur-tolerant period flowing through an automobile exhaust device in an automobile experimental platform;
comparing the experimental sulfur content information with target sulfur content information, and adjusting the content of the sulfur additive in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information;
and carrying out sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information.
Preferably, the obtaining the experimental sulfur content information of the automobile exhaust device flowing in the unit sulfur-resistant period in the automobile experimental platform includes:
acquiring fuel oil information and engine oil information consumed under a preset working condition in an automobile experiment platform, and acquiring total sulfur content information consumed according to the fuel oil information and the engine oil information;
obtaining a first preset driving mileage and a unit driving mileage in a unit sulfur tolerance period, and obtaining sulfur tolerance times according to the first preset driving mileage and the unit driving mileage in the unit sulfur tolerance period;
and obtaining experimental sulfur content information flowing through the automobile exhaust device according to the sulfur tolerance times and the total sulfur content information.
Preferably, the obtaining the fuel information and the engine oil information consumed under the preset working condition in the automobile experiment platform, and obtaining the total sulfur content information consumed according to the fuel information and the engine oil information includes:
acquiring fuel oil information and engine oil information consumed under a preset working condition in an automobile experiment platform;
acquiring an adjustment instruction, extracting sulfur content information in fuel oil information and engine oil information of the adjustment instruction, and adjusting the fuel oil information and the engine oil information according to the sulfur content information to obtain adjusted fuel oil information and engine oil information;
and obtaining the total sulfur content information of consumption according to the adjusted fuel oil information and engine oil information.
Preferably, the sulfur tolerance test is performed on the automobile exhaust device according to the experimental sulfur additive content information, including:
obtaining time information of sulfur tolerance times and unit sulfur tolerance period;
obtaining experimental sulfur-tolerant operation duration according to the sulfur-tolerant times and the time information of the unit sulfur-tolerant period;
and carrying out sulfur tolerance test on the automobile tail gas device according to the content information of the experimental sulfur additive and the experimental sulfur tolerance operation time.
Preferably, before the experimental sulfur-tolerant operation duration is obtained according to the sulfur-tolerant times and the time information of the unit sulfur-tolerant period, the method further comprises:
obtaining experimental sulfur accumulating rate;
when the experimental sulfur accumulating rate is smaller than the preset sulfur accumulating rate, adjusting the time information of the unit sulfur tolerance period to obtain the target unit sulfur tolerance time;
the step of obtaining experimental sulfur-tolerant operation duration according to the sulfur-tolerant times and the time information of the unit sulfur-tolerant period comprises the following steps:
and obtaining experimental sulfur-resistant operation duration according to the sulfur-resistant times and the target unit sulfur-resistant duration.
Preferably, before the sulfur tolerance test is performed on the automobile exhaust device according to the experimental sulfur additive content information, the method further includes:
acquiring a second preset driving distance and a unit driving distance in a unit carbon-resistant regeneration period, and obtaining regeneration times according to the second preset driving distance and the unit driving distance in the unit carbon-resistant regeneration period;
obtaining experimental regeneration operation time according to the regeneration times and the time information of the unit carbon-resistant regeneration period;
and carrying out carbon resistance test on the automobile exhaust device according to the regeneration times and the experimental regeneration operation time.
Preferably, before the carbon resistance test is performed on the automobile exhaust device according to the regeneration times and the experimental regeneration operation time, the method further includes:
adjusting the operation parameter information of the electronic control unit, and increasing the current carbon accumulating rate according to the operation parameter information to obtain a target carbon accumulating rate;
adjusting the experimental regeneration operation time length through the target carbon accumulating rate to obtain a target regeneration operation time length;
and performing a carbon resistance test on the automobile exhaust device according to the regeneration times and the experimental regeneration operation time, wherein the carbon resistance test comprises the following steps:
and carrying out carbon resistance test on the automobile exhaust device according to the regeneration times and the target regeneration operation time.
In addition, in order to achieve the above object, the present invention also provides a test device for an automobile exhaust device, the test device for an automobile exhaust device comprising: the device comprises a memory, a processor and a test program of the automobile exhaust device stored in the memory and running on the processor, wherein the test program of the automobile exhaust device realizes the steps of the test method of the automobile exhaust device when being executed by the processor.
In addition, in order to achieve the above object, the present invention also proposes a storage medium having stored thereon a test program of an automobile exhaust device, which when executed by a processor, implements the steps of the test method of an automobile exhaust device as described above.
In addition, in order to achieve the above object, the present invention also provides a testing device for an automobile exhaust device, the testing device for an automobile exhaust device comprising:
the acquisition module is used for acquiring experimental sulfur content information of the automobile exhaust device flowing in a unit sulfur-resistant period in the automobile experimental platform;
the comparison module is used for comparing the experimental sulfur content information with target sulfur content information, and adjusting the content of the sulfur additive in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information;
and the test module is used for carrying out sulfur tolerance test on the automobile exhaust device according to the content information of the experimental sulfur additive.
According to the technical scheme provided by the invention, experimental sulfur content information of the unit sulfur-resistant period flowing through the automobile exhaust device in the automobile experimental platform is obtained; comparing the experimental sulfur content information with target sulfur content information, and adjusting the content of the sulfur additive in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information; and carrying out sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information, so that the experimental sulfur content information in the automobile experiment platform can reach the optimal sulfur content by adjusting the sulfur additive content in the automobile exhaust device, and the reliability realization flexibility of the aftertreatment system is improved.
Drawings
FIG. 1 is a schematic diagram of a gateway device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a testing method of an automobile exhaust device according to the present invention;
FIG. 3 is a flow chart of a second embodiment of a testing method of an automobile exhaust device according to the present invention;
FIG. 4 is a schematic flow chart of a third embodiment of a testing method of an automobile exhaust device according to the present invention;
fig. 5 is a block diagram showing the structure of a first embodiment of a test device for an automobile exhaust system according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a test device for an automobile exhaust device in a hardware operation environment according to an embodiment of the present invention.
As shown in fig. 1, the test apparatus for an automobile exhaust device may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display (Display), the optional user interface 1003 may also include a standard wired interface as well as a wireless interface, and the wired interface of the user interface 1003 may be a universal serial bus (Universal Serial Bus, USB) interface in the present invention. The network interface 1004 may optionally include a standard wired interface as well as a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high speed random access memory (Random Access Memory, RAM); the Memory may be a stable Memory, such as a Non-volatile Memory (Non-volatile Memory), and specifically, a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the configuration shown in fig. 1 is not limiting of the test equipment for an automobile exhaust unit and may include more or fewer components than shown, or certain components may be combined, or a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a test program of an automobile exhaust device may be included in a memory 1005 as one type of computer storage medium.
In the test apparatus of the automobile exhaust apparatus shown in fig. 1, the network interface 1004 is mainly used for connecting to a background server, and performing data communication with the background server; the user interface 1003 is mainly used for connecting peripherals; the test equipment of the automobile exhaust device calls a test program of the automobile exhaust device stored in the memory 1005 through the processor 1001, and executes the test method of the automobile exhaust device provided by the embodiment of the invention.
Based on the hardware structure, the embodiment of the test method of the automobile exhaust device is provided.
Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of a testing method of an automobile exhaust device according to the present invention.
In a first embodiment, the method for testing an automobile exhaust device includes the steps of:
step S10: and obtaining experimental sulfur content information of the unit sulfur-resistant period flowing through the automobile exhaust device in the automobile experimental platform.
It should be noted that, the execution body of the embodiment is a test device of an automobile exhaust device, and may be other devices that can implement the same or similar functions, and this embodiment is not limited thereto.
In this embodiment, the automobile experiment platform is an automobile test bench, the automobile test bench can be used for carrying out reliability tests on an automobile to be realized, the reliability tests comprise sulfur-tolerant tests and carbon accumulating tests, and can also comprise other reliability tests, the embodiment is not limited to the sulfur-tolerant tests, the automobile experiment platform is flexibly adjusted to meet the experimental working condition of user requirements, the sulfur-tolerant tests are carried out under the experimental working condition, so that the accuracy of the experiment is ensured, the carbon accumulating tests are used for burning off soot particles trapped in the particle catcher DPF (Diesel Particulate Filter) through periodical regeneration, the DPF is a post-treatment device for reducing particles in tail gas through filtration, the accumulation of the particles in the DPF can lead to the increase of engine backpressure, the dynamic property and economical efficiency of the engine are influenced, the periodical regeneration is needed for burning off soot particles trapped in the DPF, the regeneration can lead to the inside of the DPF to generate high temperature, and the reliability of the DPF is influenced, and therefore, the automobile experiment platform is used for setting parameter information such as regeneration times and the like, so that the reliability test of accumulating carbon is carried out on the basis of the actual running condition of the automobile is ensured, the unit sulfur-tolerant period is a sulfur-tolerant sulfur period which is a sulfur-tolerant/sulfur-tolerant sulfur content of the actual experiment in the automobile, and sulfur-tolerant sulfur content is realized in the experiment environment of the experiment platform.
Step S20: and comparing the experimental sulfur content information with target sulfur content information, and adjusting the content of the sulfur additive in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information.
In this embodiment, the sulfur tolerance test method of the NSC considers the total amount of sulfur flowing through the NSC in the life cycle, taking an N1 class vehicle as an example, the life cycle is 16 ten thousand kilometers, meanwhile, considering hundred kilometers of fuel consumption of the vehicle, assuming that 10L and 10ppm of sulfur content in the national six-fuel oil, the sulfur content of the fuel oil flowing through the NSC in 16 ten thousand kilometers is 160000×10/100/0.84 (diesel density) ×10/1000000=0.19 g. The engine-fuel ratio is calculated according to one thousandth, the sulfur content in engine oil is calculated according to 0.4%, the sulfur content of engine oil flowing through NSC in 16 ten thousand kilometers is 160000 x 10/100/0.84/1000 x 0.004=76.19 g, the total sulfur content of NSC flowing through NSC in life cycle is 76.38g, the desulfurization period k1 is obtained, the sulfur content of NSC flowing through in each cumulative sulfur/desulfurization period is b=76.38/k 1, and b is taken as target sulfur content information.
In a specific implementation, in order to achieve the target sulfur content information, the experimental sulfur content information is compared with the target sulfur content information, where the experimental sulfur content information may be represented by a, a is compared with b, and the content of a is adjusted according to the comparison result, so that a reaches b.
It can be understood that the medium-speed and medium-load working condition of the engine is selected, meanwhile, the inlet temperature of the NSC is required to be ensured to be 300 ℃ +/-2 ℃, the adsorption efficiency of sulfur on the NSC can reach more than 95% according to different NSC coating technologies, the oil consumption and the engine oil consumption of the working condition are measured, the duration of a rack sulfur accumulation/desulfurization period is set to be h1, the regeneration of the DPF is usually carried out after the regeneration of the DPF is carried out for 2 to 3 times, the NSC desulfurization is carried out for one time after the regeneration of the DPF, the sulfur content flowing through the NSC in the sulfur accumulation/desulfurization period is calculated, the actually measured a is calculated according to the sulfur accumulation/desulfurization period times k1 = 160000/sulfur accumulation desulfurization period driving mileage within 16 ten thousand kilometers of the whole vehicle, the sulfur content required to flow through the NSC in each sulfur accumulation/desulfurization period is b = 76.38/k1, and the sulfur content of (b-a) is realized by adding sulfur-containing additives into the fuel.
Step S30: and carrying out sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information.
In this embodiment, the content information of the experimental sulfur additive is sulfur additive which can be added into the fuel oil or the engine oil, and the experimental environment of the automobile in the experimental platform reaches the real running environment by adjusting the sulfur additive in the fuel oil or the engine oil, so that the real simulation environment of the experimental platform is realized.
According to the embodiment, through the scheme, experimental sulfur content information of the automobile exhaust device flowing through the automobile exhaust device in a unit sulfur-resistant period in the automobile experimental platform is obtained; comparing the experimental sulfur content information with target sulfur content information, and adjusting the content of the sulfur additive in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information; and carrying out sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information, so that the experimental sulfur content information in the automobile experiment platform can reach the optimal sulfur content by adjusting the sulfur additive content in the automobile exhaust device, and the reliability realization flexibility of the aftertreatment system is improved.
Referring to fig. 3, fig. 3 is a schematic flow chart of a second embodiment of a testing method for an automobile exhaust device according to the present invention, and based on the first embodiment shown in fig. 2, the second embodiment of the testing method for an automobile exhaust device according to the present invention is provided.
In a second embodiment, the feature information of the vehicle-mounted terminal includes identification code information of the vehicle-mounted terminal, and the step S10 includes:
and step S101, acquiring fuel oil information and engine oil information consumed under a preset working condition in an automobile experiment platform, and obtaining total sulfur content information consumed according to the fuel oil information and the engine oil information.
In this embodiment, since both the fuel information and the engine oil information contain sulfur, the total sulfur content information is obtained by obtaining the consumed fuel information and the engine oil information and then obtaining the sulfur content percentage information in the fuel information and the engine oil information, where the preset working condition is a medium speed and medium load working condition of the engine, and may be adjusted to other working condition information according to the actual situation.
Step S102, obtaining a first preset driving distance and a unit driving distance in a unit sulfur tolerance period, and obtaining sulfur tolerance times according to the first preset driving distance and the unit driving distance in the unit sulfur tolerance period.
It should be noted that, the first preset driving distance is a total driving distance of the automobile in a life cycle, which may be 16 ten thousand kilometers, or may be other mileage parameter information, which is not limited in this embodiment, 16 ten thousand kilometers is taken as an example to describe the first preset driving distance, and a sulfur-accumulating desulfurization cycle driving distance is obtained, and the number of sulfur-tolerant cycles can be obtained through the total driving distance in the life cycle and the sulfur-accumulating desulfurization cycle driving distance, so as to realize the determination of the cycle number in the automobile experiment platform.
And step S103, obtaining experimental sulfur content information flowing through the automobile exhaust device according to the sulfur tolerance times and the total sulfur content information.
In the embodiment, sulfur content information in a unit sulfur tolerance period is obtained by acquiring sulfur tolerance times and total sulfur content information, and adjustment of the sulfur content information in the unit sulfur tolerance period in an automobile experiment platform is realized by comparing the sulfur content information in the unit sulfur tolerance period with target sulfur content information.
Further, the step S101 includes:
acquiring fuel oil information and engine oil information consumed under a preset working condition in an automobile experiment platform; acquiring an adjustment instruction, extracting sulfur content information in fuel oil information and engine oil information of the adjustment instruction, and adjusting the fuel oil information and the engine oil information according to the sulfur content information to obtain adjusted fuel oil information and engine oil information; and obtaining the total sulfur content information of consumption according to the adjusted fuel oil information and engine oil information.
In this embodiment, if the influence of the inferior fuel or engine oil on the sulfur tolerance reliability of the NSC is to be examined, the sulfur content in the fuel or engine oil may be modified, that is, the sulfur content information in the fuel information and the engine oil information of the adjustment instruction may be extracted by obtaining the adjustment instruction, and the fuel information and the engine oil information may be adjusted according to the sulfur content information, so as to obtain the adjusted fuel information and engine oil information, thereby ensuring that the fuel information and the engine oil information in the automobile experiment platform are consistent with the actual situation, and realizing flexible adjustment of data in the experiment process.
According to the scheme, the sulfur content information in the command fuel oil information and the engine oil information is adjusted by considering the influence of the inferior fuel oil or engine oil on the NSC sulfur tolerance reliability test, so that the fuel oil information and the engine oil information in the automobile experiment platform are ensured to be consistent with the actual conditions.
Referring to fig. 4, fig. 4 is a flow chart schematically illustrating a third embodiment of a testing method for an automobile exhaust device according to the present invention, and the third embodiment of the testing method for an automobile exhaust device according to the present invention is proposed based on the first embodiment or the second embodiment, and in this embodiment, the description is given based on the first embodiment.
In a third embodiment, the step S30 includes:
step S301, obtaining time information of sulfur tolerance times and unit sulfur tolerance period.
In this embodiment, a rack, i.e., a duration of a sulfur accumulation/desulfurization cycle in an automobile experiment platform is set to be h 1 The test operation time length is calculated according to the sulfur accumulation/desulfurization cycle times within 16 ten thousand kilometers of the whole vehicle, and the sulfur accumulation/desulfurization times k1=160000/one sulfur accumulation desulfurization cycle driving mileage is obtained, so that the sulfur resistance times and the time information of the unit sulfur resistance cycle are obtained.
And step S302, obtaining the experimental sulfur-tolerant operation duration according to the sulfur-tolerant times and the time information of the unit sulfur-tolerant period.
In a specific implementation, the experimental sulfur-tolerant operation duration is obtained by adopting a preset formula according to the sulfur-tolerant times and the time information of the unit sulfur-tolerant period, wherein the preset formula is the total experimental operation duration h=k1×h1, so that the determination of the total operation duration in the automobile experimental platform is realized.
And step S303, carrying out sulfur tolerance test on the automobile exhaust device according to the content information of the experimental sulfur additive and the experimental sulfur tolerance operation time.
Further, before the step S302, the method further includes:
obtaining experimental sulfur accumulating rate; and when the experimental sulfur accumulating rate is smaller than the preset sulfur accumulating rate, adjusting the time information of the unit sulfur tolerance period to obtain the target unit sulfur tolerance duration.
It should be noted that, the preset accumulated sulfur rate is 1g/h, and may be other parameter information, which is not limited in this embodiment, 1g/h is taken as an example to describe that the experimental accumulated sulfur rate, and the bench accumulated sulfur rate b/h is obtained 1 If the ratio is larger than 1g/h, the ratio is adjusted to be h 1 The duration is ensured, so that the total operation duration in the automobile experiment platform is consistent with the actual operation duration, and the actual operation state is more met.
The step of obtaining experimental sulfur-tolerant operation duration according to the sulfur-tolerant times and the time information of the unit sulfur-tolerant period comprises the following steps: obtaining experimental sulfur-tolerant operation time according to the sulfur-tolerant times and the target unit sulfur-tolerant time, and obtaining test parameter information in the sulfur-tolerant test, and performing boundary control and sulfur accumulation rate control through the test parameter information, thereby realizing more flexible sulfur-tolerant test.
Further, before the step S30, the method further includes:
obtaining a second preset driving distance and a unit driving distance in a unit carbon-resistant regeneration period, and obtaining the regeneration times according to the second preset driving distance and the unit driving distance in the unit carbon-resistant regeneration period.
Note that DPF (Diesel Particulate Filter) is an aftertreatment device that reduces Particulate Matter (PM) in exhaust gas by filtration, and accumulation of particulate matter in DPF may cause an increase in engine back pressure, affecting engine dynamics and economy, so periodic regeneration is required to burn off soot particles trapped in DPF, and regeneration may cause high temperature inside DPF, affecting reliability of DPF, so carbon resistance test, i.e. DPF carbon accumulation test, may be performed before sulfur resistance test is performed.
In this embodiment, the second preset driving range is a total driving range of the automobile in a life cycle, which may be 16 ten thousand kilometers, or may be other mileage parameter information, which is not limited in this embodiment, and in this embodiment, 16 ten thousand kilometers is taken as an example for illustration.
And obtaining experimental regeneration operation time according to the regeneration times and the time information of the unit carbon-resistant regeneration period, and performing carbon resistance test on the automobile exhaust device according to the regeneration times and the experimental regeneration operation time.
In a specific implementation, the DPF reliability test method considers the number of times of DPF carbon accumulation regeneration, the regeneration number k2=160000/regeneration mileage, a rack carbon accumulation/regeneration period duration h2 is set, the total test operation duration h=k2×h2 is generally controlled to be 800-1000h, the total duration h can be adjusted according to the specific conditions, the carbon accumulation rate can be increased by data of an adjustable electronic control unit (Electronic Control Unit, ECU), and the test duration can be shortened. And carrying out universal characteristic smoke intensity test before the test, wherein the test working condition is a medium-speed and medium-load working condition with high smoke intensity and DPF inlet not higher than 300 ℃, and if the DPF inlet is higher than 300 ℃, the passive regeneration rate of the DPF is increased to influence the carbon accumulating rate.
Further, before the carbon resistance test is performed on the automobile exhaust device according to the regeneration times and the experimental regeneration operation time, the method further includes:
adjusting the operation parameter information of the electronic control unit, and increasing the current carbon accumulating rate according to the operation parameter information to obtain a target carbon accumulating rate; and adjusting the experimental regeneration operation time length through the target carbon accumulating rate to obtain the target regeneration operation time length.
And performing a carbon resistance test on the automobile exhaust device according to the regeneration times and the experimental regeneration operation time, wherein the carbon resistance test comprises the following steps:
and carrying out carbon resistance test on the automobile exhaust device according to the regeneration times and the target regeneration operation time.
The embodiment can also simultaneously check the test of the sulfur-resistant reliability of the NSC and the reliability of the DPF, simultaneously consider key elements of the sulfur-resistant test of the NSC and the reliability test of the DPF, select medium-load working conditions in the engine, simultaneously ensure that the inlet temperature of the NSC is 300+/-2 ℃, and properly adjust according to different NSC coating technologies. The sulfur accumulation rate in the h1 time period is not higher than 1g/h by adjusting the proportion of sulfur-containing additives in the fuel, if the sulfur accumulation rate is higher than 1g/h, the h1 time period is required to be adjusted, the accumulated carbon and regeneration of the DPF are completed once in the h2 time period by adjusting ECU data, the accumulated carbon rate is not higher than 10g/h, if the accumulated carbon rate is higher than 10g/h, the h2 time period is required to be adjusted, and because the desulfurization is carried out after the DPF is regenerated for 2 to 3 times, the h1 is 2 or 3 times of the h2, and the sulfur accumulation rate is consistent with the calibration condition of the whole vehicle, so that the synchronous check on the sulfur resistance of the NSC and the reliability of the DPF can be ensured to be synchronously completed in the same total test time period h.
According to the scheme, sulfur resistance reliability and DPF reliability of the NSC are achieved by selecting a steady-state engine working condition to load sulfur and carbon on the NSC and the DPF, and trapped sulfur and carbon are treated through high temperature. In the whole vehicle calibration, desulfurization/regeneration is calibrated according to 1/2 or 1/3, so that the sulfur-resistant reliability of NSC and the DPF reliability can be simultaneously evaluated by adjusting the working condition of an engine, the test boundary, the ECU parameters and the like through one test.
In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium stores a test program of the automobile exhaust device, and the test program of the automobile exhaust device realizes the steps of the test method of the automobile exhaust device when being executed by a processor.
Because the storage medium adopts all the technical schemes of all the embodiments, the storage medium has at least all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted here.
In addition, referring to fig. 5, an embodiment of the present invention further provides a testing device for an automobile exhaust device, where the testing device for an automobile exhaust device includes:
the acquisition module 10 is used for acquiring experimental sulfur content information of the automobile exhaust device flowing in a unit sulfur-resistant period in the automobile experimental platform.
It should be noted that, the execution body of the embodiment is a test device of an automobile exhaust device, and may be other devices that can implement the same or similar functions, and this embodiment is not limited thereto.
In this embodiment, the automobile experiment platform is an automobile test bench, the automobile test bench can be used for carrying out reliability tests on an automobile to be realized, the reliability tests comprise sulfur-tolerant tests and carbon accumulating tests, and can also comprise other reliability tests, the embodiment is not limited to the sulfur-tolerant tests, the automobile experiment platform is flexibly adjusted to meet the experimental working condition of user requirements, the sulfur-tolerant tests are carried out under the experimental working condition, so that the accuracy of the experiment is ensured, the carbon accumulating tests are used for burning off soot particles trapped in the particle catcher DPF (Diesel Particulate Filter) through periodical regeneration, the DPF is a post-treatment device for reducing particles in tail gas through filtration, the accumulation of the particles in the DPF can lead to the increase of engine backpressure, the dynamic property and economical efficiency of the engine are influenced, the periodical regeneration is needed for burning off soot particles trapped in the DPF, the regeneration can lead to the inside of the DPF to generate high temperature, and the reliability of the DPF is influenced, and therefore, the automobile experiment platform is used for setting parameter information such as regeneration times and the like, so that the reliability test of accumulating carbon is carried out on the basis of the actual running condition of the automobile is ensured, the unit sulfur-tolerant period is a sulfur-tolerant sulfur period which is a sulfur-tolerant/sulfur-tolerant sulfur content of the actual experiment in the automobile, and sulfur-tolerant sulfur content is realized in the experiment environment of the experiment platform.
Step S20: and comparing the experimental sulfur content information with target sulfur content information, and adjusting the content of the sulfur additive in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information.
In this embodiment, the sulfur tolerance test method of the NSC considers the total amount of sulfur flowing through the NSC in the life cycle, taking an N1 class vehicle as an example, the life cycle is 16 ten thousand kilometers, meanwhile, considering hundred kilometers of fuel consumption of the vehicle, assuming that 10L and 10ppm of sulfur content in the national six-fuel oil, the sulfur content of the fuel oil flowing through the NSC in 16 ten thousand kilometers is 160000×10/100/0.84 (diesel density) ×10/1000000=0.19 g. The engine-fuel ratio is calculated according to one thousandth, the sulfur content in engine oil is calculated according to 0.4%, the sulfur content of engine oil flowing through NSC in 16 ten thousand kilometers is 160000 x 10/100/0.84/1000 x 0.004=76.19 g, the total sulfur content of NSC flowing through NSC in life cycle is 76.38g, the desulfurization period k1 is obtained, the sulfur content of NSC flowing through in each cumulative sulfur/desulfurization period is b=76.38/k 1, and b is taken as target sulfur content information.
In a specific implementation, in order to achieve the target sulfur content information, the experimental sulfur content information is compared with the target sulfur content information, where the experimental sulfur content information may be represented by a, a is compared with b, and the content of a is adjusted according to the comparison result, so that a reaches b.
It can be understood that the medium-speed and medium-load working condition of the engine is selected, meanwhile, the inlet temperature of the NSC is required to be ensured to be 300 ℃ +/-2 ℃, the adsorption efficiency of sulfur on the NSC can reach more than 95% according to different NSC coating technologies, the oil consumption and the engine oil consumption of the working condition are measured, the duration of a rack sulfur accumulation/desulfurization period is set to be h1, the regeneration of the DPF is usually carried out after the regeneration of the DPF is carried out for 2 to 3 times, the NSC desulfurization is carried out for one time after the regeneration of the DPF, the sulfur content flowing through the NSC in the sulfur accumulation/desulfurization period is calculated, the actually measured a is calculated according to the sulfur accumulation/desulfurization period times k1 = 160000/sulfur accumulation desulfurization period driving mileage within 16 ten thousand kilometers of the whole vehicle, the sulfur content required to flow through the NSC in each sulfur accumulation/desulfurization period is b = 76.38/k1, and the sulfur content of (b-a) is realized by adding sulfur-containing additives into the fuel.
Step S30: and carrying out sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information.
In this embodiment, the content information of the experimental sulfur additive is sulfur additive which can be added into the fuel oil or the engine oil, and the experimental environment of the automobile in the experimental platform reaches the real running environment by adjusting the sulfur additive in the fuel oil or the engine oil, so that the real simulation environment of the experimental platform is realized.
According to the embodiment, through the scheme, experimental sulfur content information of the automobile exhaust device flowing through the automobile exhaust device in a unit sulfur-resistant period in the automobile experimental platform is obtained; comparing the experimental sulfur content information with target sulfur content information, and adjusting the content of the sulfur additive in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information; and carrying out sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information, so that the experimental sulfur content information in the automobile experiment platform can reach the optimal sulfur content by adjusting the sulfur additive content in the automobile exhaust device, and the reliability realization flexibility of the aftertreatment system is improved.
In an embodiment, the obtaining module is further configured to obtain fuel information and engine oil information consumed under a preset working condition in the automobile experiment platform, and obtain total sulfur content information consumed according to the fuel information and the engine oil information;
obtaining a first preset driving mileage and a unit driving mileage in a unit sulfur tolerance period, and obtaining sulfur tolerance times according to the first preset driving mileage and the unit driving mileage in the unit sulfur tolerance period;
and obtaining experimental sulfur content information flowing through the automobile exhaust device according to the sulfur tolerance times and the total sulfur content information.
In an embodiment, the obtaining module is further configured to obtain fuel information and engine oil information consumed under a preset working condition in the automobile experiment platform;
acquiring an adjustment instruction, extracting sulfur content information in fuel oil information and engine oil information of the adjustment instruction, and adjusting the fuel oil information and the engine oil information according to the sulfur content information to obtain adjusted fuel oil information and engine oil information;
and obtaining the total sulfur content information of consumption according to the adjusted fuel oil information and engine oil information.
In an embodiment, the test module is further configured to obtain time information of sulfur tolerance times and a unit sulfur tolerance period;
obtaining experimental sulfur-tolerant operation duration according to the sulfur-tolerant times and the time information of the unit sulfur-tolerant period;
and carrying out sulfur tolerance test on the automobile tail gas device according to the content information of the experimental sulfur additive and the experimental sulfur tolerance operation time.
In an embodiment, the obtaining module is further configured to obtain an experimental sulfur accumulation rate;
when the experimental sulfur accumulating rate is smaller than the preset sulfur accumulating rate, adjusting the time information of the unit sulfur tolerance period to obtain the target unit sulfur tolerance time;
the step of obtaining experimental sulfur-tolerant operation duration according to the sulfur-tolerant times and the time information of the unit sulfur-tolerant period comprises the following steps:
and obtaining experimental sulfur-resistant operation duration according to the sulfur-resistant times and the target unit sulfur-resistant duration.
In an embodiment, the test module is further configured to obtain a second preset driving distance and a unit driving distance in a unit carbon-resistant regeneration period, and obtain the regeneration times according to the second preset driving distance and the unit driving distance in the unit carbon-resistant regeneration period;
obtaining experimental regeneration operation time according to the regeneration times and the time information of the unit carbon-resistant regeneration period;
and carrying out carbon resistance test on the automobile exhaust device according to the regeneration times and the experimental regeneration operation time.
In an embodiment, the test module is further configured to adjust operation parameter information of the electronic control unit, and increase a current carbon accumulating rate according to the operation parameter information to obtain a target carbon accumulating rate;
adjusting the experimental regeneration operation time length through the target carbon accumulating rate to obtain a target regeneration operation time length;
and carrying out carbon resistance test on the automobile exhaust device according to the regeneration times and the target regeneration operation time.
The testing device of the automobile exhaust device adopts all the technical schemes of all the embodiments, so that the testing device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the testing device is not repeated herein.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (7)
1. The test method of the automobile exhaust device is characterized by comprising the following steps of:
obtaining experimental sulfur content information of the unit sulfur-tolerant period flowing through an automobile exhaust device in an automobile experimental platform;
comparing the experimental sulfur content information with target sulfur content information, and adjusting the content of the sulfur additive in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information;
carrying out sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information;
the method for obtaining the experimental sulfur content information of the automobile exhaust device flowing through the automobile exhaust device in a unit sulfur-resistant period in the automobile experimental platform comprises the following steps:
acquiring fuel oil information and engine oil information consumed under a preset working condition in an automobile experiment platform, and acquiring total sulfur content information consumed according to the fuel oil information and the engine oil information;
obtaining a first preset driving mileage and a unit driving mileage in a unit sulfur tolerance period, and obtaining sulfur tolerance times according to the first preset driving mileage and the unit driving mileage in the unit sulfur tolerance period;
obtaining experimental sulfur content information flowing through an automobile exhaust device according to the sulfur tolerance times and the total sulfur content information;
the method for obtaining the fuel information and the engine oil information consumed under the preset working condition in the automobile experiment platform, and obtaining the total sulfur content information consumed according to the fuel information and the engine oil information comprises the following steps:
acquiring fuel oil information and engine oil information consumed under a preset working condition in an automobile experiment platform;
acquiring an adjustment instruction, extracting sulfur content information in fuel oil information and engine oil information of the adjustment instruction, and adjusting the fuel oil information and the engine oil information according to the sulfur content information to obtain adjusted fuel oil information and engine oil information;
obtaining total sulfur content information of consumption according to the adjusted fuel oil information and engine oil information;
the sulfur tolerance test is carried out on the automobile exhaust device according to the experimental sulfur additive content information, and the sulfur tolerance test comprises the following steps:
obtaining time information of sulfur tolerance times and unit sulfur tolerance period;
obtaining experimental sulfur-tolerant operation duration according to the sulfur-tolerant times and the time information of the unit sulfur-tolerant period;
and carrying out sulfur tolerance test on the automobile tail gas device according to the content information of the experimental sulfur additive and the experimental sulfur tolerance operation time.
2. The method for testing an automobile exhaust system according to claim 1, wherein before the experimental sulfur-tolerant operating time period is obtained according to the sulfur-tolerant times and the time information of the unit sulfur-tolerant cycle, the method further comprises:
obtaining experimental sulfur accumulating rate;
when the experimental sulfur accumulating rate is smaller than the preset sulfur accumulating rate, adjusting the time information of the unit sulfur tolerance period to obtain the target unit sulfur tolerance time;
the step of obtaining experimental sulfur-tolerant operation duration according to the sulfur-tolerant times and the time information of the unit sulfur-tolerant period comprises the following steps:
and obtaining experimental sulfur-resistant operation duration according to the sulfur-resistant times and the target unit sulfur-resistant duration.
3. The method for testing an automobile exhaust system according to claim 1, wherein before the sulfur tolerance test is performed on the automobile exhaust system according to the experimental sulfur additive content information, the method further comprises:
acquiring a second preset driving distance and a unit driving distance in a unit carbon-resistant regeneration period, and obtaining regeneration times according to the second preset driving distance and the unit driving distance in the unit carbon-resistant regeneration period;
obtaining experimental regeneration operation time according to the regeneration times and the time information of the unit carbon-resistant regeneration period;
and carrying out carbon resistance test on the automobile exhaust device according to the regeneration times and the experimental regeneration operation time.
4. The method for testing an automobile exhaust device according to claim 3, wherein before the carbon resistance test is performed on the automobile exhaust device according to the number of regenerations and the experimental regeneration operation time, the method further comprises:
adjusting the operation parameter information of the electronic control unit, and increasing the current carbon accumulating rate according to the operation parameter information to obtain a target carbon accumulating rate;
adjusting the experimental regeneration operation time length through the target carbon accumulating rate to obtain a target regeneration operation time length;
and performing a carbon resistance test on the automobile exhaust device according to the regeneration times and the experimental regeneration operation time, wherein the carbon resistance test comprises the following steps:
and carrying out carbon resistance test on the automobile exhaust device according to the regeneration times and the target regeneration operation time.
5. The utility model provides a test equipment of automobile exhaust device which characterized in that, test equipment of automobile exhaust device includes: a memory, a processor and a test program for an automobile exhaust device stored on the memory and running on the processor, which when executed by the processor, implements the steps of the test method for an automobile exhaust device according to any one of claims 1 to 4.
6. A storage medium, wherein a test program of an automobile exhaust device is stored on the storage medium, and the test program of the automobile exhaust device, when executed by a processor, realizes the steps of the test method of an automobile exhaust device according to any one of claims 1 to 4.
7. The utility model provides a testing arrangement of automobile exhaust device which characterized in that, automobile exhaust device's testing arrangement includes:
the acquisition module is used for acquiring experimental sulfur content information of the automobile exhaust device flowing in a unit sulfur-resistant period in the automobile experimental platform;
the comparison module is used for comparing the experimental sulfur content information with target sulfur content information, and adjusting the content of the sulfur additive in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information;
the test module is used for carrying out sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information;
the acquisition module is also used for acquiring fuel oil information and engine oil information consumed under a preset working condition in the automobile experiment platform, and acquiring total sulfur content information consumed according to the fuel oil information and the engine oil information;
obtaining a first preset driving mileage and a unit driving mileage in a unit sulfur tolerance period, and obtaining sulfur tolerance times according to the first preset driving mileage and the unit driving mileage in the unit sulfur tolerance period;
obtaining experimental sulfur content information flowing through an automobile exhaust device according to the sulfur tolerance times and the total sulfur content information;
the method for obtaining the fuel information and the engine oil information consumed under the preset working condition in the automobile experiment platform, and obtaining the total sulfur content information consumed according to the fuel information and the engine oil information comprises the following steps:
acquiring fuel oil information and engine oil information consumed under a preset working condition in an automobile experiment platform;
acquiring an adjustment instruction, extracting sulfur content information in fuel oil information and engine oil information of the adjustment instruction, and adjusting the fuel oil information and the engine oil information according to the sulfur content information to obtain adjusted fuel oil information and engine oil information;
obtaining total sulfur content information of consumption according to the adjusted fuel oil information and engine oil information;
the test module is also used for acquiring sulfur tolerance times and time information of a unit sulfur tolerance period;
obtaining experimental sulfur-tolerant operation duration according to the sulfur-tolerant times and the time information of the unit sulfur-tolerant period;
and carrying out sulfur tolerance test on the automobile tail gas device according to the content information of the experimental sulfur additive and the experimental sulfur tolerance operation time.
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