CN111625958A - Test method, device, storage medium and device for automobile exhaust device - Google Patents
Test method, device, storage medium and device for automobile exhaust device Download PDFInfo
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- 238000010998 test method Methods 0.000 title claims description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 319
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 311
- 239000011593 sulfur Substances 0.000 claims abstract description 311
- 238000012360 testing method Methods 0.000 claims abstract description 138
- 239000000654 additive Substances 0.000 claims abstract description 51
- 230000000996 additive effect Effects 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 22
- 230000008929 regeneration Effects 0.000 claims description 82
- 238000011069 regeneration method Methods 0.000 claims description 82
- 238000009825 accumulation Methods 0.000 claims description 61
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 55
- 229910052799 carbon Inorganic materials 0.000 claims description 55
- 239000010705 motor oil Substances 0.000 claims description 54
- 239000000295 fuel oil Substances 0.000 claims description 33
- 239000000446 fuel Substances 0.000 claims description 26
- 238000002474 experimental method Methods 0.000 claims description 22
- 238000006477 desulfuration reaction Methods 0.000 description 30
- 230000023556 desulfurization Effects 0.000 description 30
- 239000005864 Sulphur Substances 0.000 description 8
- 239000013618 particulate matter Substances 0.000 description 7
- 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
- 230000000737 periodic effect Effects 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 239000002245 particle Substances 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
- 239000007789 gas Substances 0.000 description 4
- 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
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000001179 sorption measurement 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
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
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- 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]
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Abstract
The invention relates to the technical field of automobile reliability testing, and discloses a testing method, testing equipment, a storage medium and a testing device for an automobile exhaust device. The method comprises the steps of obtaining experimental sulfur content information flowing through an automobile exhaust device in a unit sulfur-tolerant period in an automobile experimental platform; comparing the experimental sulfur content information with target sulfur content information, and adjusting the sulfur additive content 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 experimental platform can reach the optimal sulfur content by adjusting the sulfur additive content in the automobile exhaust device, and the flexibility of realizing the reliability 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, testing equipment, a storage medium and a testing device for an automobile exhaust device.
Background
With the upgrading of emission regulations, the requirement on the purification capacity outside the engine is higher and higher, and the aftertreatment system of the automobile must be adaptively upgraded or changed. Meanwhile, the requirement on the reliability of an aftertreatment system is further improved by the proposal of the emission quality guarantee period. The nitrogen oxide Storage reduction Catalyst (NSC) is an aftertreatment device for reducing NOx emission of an engine by periodically adsorbing and desorbing NOx, the core component of the aftertreatment device is BaCO3, the NOx is adsorbed, SO2 and SO3 in exhaust gas are also adsorbed while the NOx is adsorbed, BaCO3 is converted into BaSO4, and the conversion capability of the NSC is reduced, SO that the NSC needs periodic desulfurization, the desulfurization can be realized by adjusting the working condition of the engine, a large amount of reducing gases such as CO, H2 and HC are generated in the exhaust gas by periodically adjusting parameters such as an excess air coefficient of the engine, and BaSO4 can be reduced into BaCO3 by ensuring that an inlet of the NSC is above 680 ℃.
However, the reliability of the aftertreatment system is mainly obtained by monitoring the catalytic capability of the nitrogen oxide storage reduction catalyst at present, and a more flexible reliability test cannot be performed on the aftertreatment system.
Disclosure of Invention
The invention mainly aims to provide a method, equipment, a storage medium and a device for testing an automobile exhaust device, and aims to improve the flexibility of reliability testing of an aftertreatment system.
In order to achieve the above object, the present invention provides a method for testing an automobile exhaust device, comprising the steps of:
acquiring experimental sulfur content information flowing through an automobile exhaust device in a unit sulfur-tolerant period in an automobile experimental platform;
comparing the experimental sulfur content information with target sulfur content information, and adjusting the sulfur additive content in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information;
and carrying out a sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information.
Preferably, the acquiring of the experimental sulfur content information flowing through the automobile exhaust device in the unit sulfur-tolerant period in the automobile experimental platform comprises:
acquiring fuel 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 information and the engine oil information;
acquiring a first preset driving mileage and a unit driving mileage in a unit sulfur-tolerant period, and obtaining the number of times of sulfur tolerance according to the first preset driving mileage and the unit driving mileage in the unit sulfur-tolerant 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 acquiring fuel 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 information and the engine oil information includes:
acquiring fuel 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 consumed total sulfur content information according to the adjusted fuel oil information and engine oil information.
Preferably, the performing a sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information includes:
acquiring the times of sulfur tolerance and time information of a unit sulfur tolerance period;
obtaining the running time of the experimental sulfur tolerance according to the sulfur tolerance times and the time information of the unit sulfur tolerance period;
and carrying out sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information and the experimental sulfur tolerance operation time length.
Preferably, before the obtaining of the experimental sulfur tolerance operation time length according to the number of times of sulfur tolerance and the time information of the unit sulfur tolerance period, the method further comprises:
acquiring an experimental sulfur accumulation rate;
when the experimental sulfur accumulation rate is smaller than a preset sulfur accumulation rate, adjusting the time information of the unit sulfur tolerance period to obtain a target unit sulfur tolerance duration;
the step of obtaining the experimental sulfur tolerance operation duration according to the sulfur tolerance times and the time information of the unit sulfur tolerance period comprises the following steps:
and obtaining the experimental sulfur-tolerant operation time according to the sulfur-tolerant times and the target unit sulfur-tolerant time.
Preferably, before the sulfur tolerance test is performed on the automobile exhaust device according to the experimental sulfur additive content information, the method further comprises:
acquiring a second preset driving mileage and a unit driving mileage in a unit carbon-resistant regeneration period, and obtaining regeneration times according to the second preset driving mileage and the unit driving mileage 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 comprises the following steps:
adjusting the operation parameter information of an electronic control unit, and increasing the current carbon accumulation rate according to the operation parameter information to obtain a target carbon accumulation rate;
adjusting the experimental regeneration operation time length according to the target carbon accumulation rate to obtain a target regeneration operation time length;
the carbon resistance test is carried out on the automobile exhaust device according to the regeneration times and the experimental regeneration operation duration, and 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 further provides a testing apparatus for an automobile exhaust device, including: the testing method comprises the steps of storing a testing program of the automobile exhaust device, storing the testing program of the automobile exhaust device in a memory, storing the testing program of the automobile exhaust device in the memory, and running the testing program of the automobile exhaust device on the processor, wherein the steps of the testing method of the automobile exhaust device are realized when the testing program of the automobile exhaust device is executed by the processor.
In addition, in order to achieve the above object, the present invention further provides a storage medium, in which a test program of an automobile exhaust device is stored, and the test program of the automobile exhaust device, when executed by a processor, implements the steps of the test method of the automobile exhaust device as described above.
In addition, in order to achieve the above object, the present invention further provides a testing apparatus for an automobile exhaust device, including:
the acquisition module is used for acquiring experimental sulfur content information flowing through the automobile exhaust device in a unit sulfur-tolerant 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 sulfur additive content 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 experimental sulfur additive content information.
According to the technical scheme provided by the invention, experimental sulfur content information flowing through an automobile exhaust device in a unit sulfur-tolerant period in an automobile experimental platform is obtained; comparing the experimental sulfur content information with target sulfur content information, and adjusting the sulfur additive content 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 experimental platform can reach the optimal sulfur content by adjusting the sulfur additive content in the automobile exhaust device, and the flexibility of realizing the reliability of the aftertreatment system is improved.
Drawings
Fig. 1 is a schematic structural 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 method for testing an automobile exhaust system according to the present invention;
FIG. 3 is a schematic flow chart of a second embodiment of a testing method for an automobile exhaust system according to the present invention;
FIG. 4 is a schematic flow chart of a third embodiment of a testing method for an automobile exhaust system according to the present invention;
fig. 5 is a block diagram showing the structure of a first embodiment of the testing device for an automobile exhaust device according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a testing device of an automobile exhaust device in a hardware operating 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 (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), the optional user interface 1003 may also include a standard wired interface and a wireless interface, and the wired interface of the user interface 1003 may be a 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 (RAM); or a stable Memory, such as a Non-volatile Memory (Non-volatile Memory), and may be a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in FIG. 1 does not constitute a limitation of the testing apparatus for an automotive exhaust device, and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, the memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a test program of an automobile exhaust device.
In the testing apparatus of the automobile exhaust device shown in fig. 1, the network interface 1004 is mainly used for connecting with a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting peripheral equipment; the testing equipment of the automobile exhaust device calls the testing program of the automobile exhaust device stored in the memory 1005 through the processor 1001 and executes the testing 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 comprises the following steps:
step S10: and acquiring the experimental sulfur content information of the unit sulfur-tolerant period flowing through the automobile exhaust device in the automobile experimental platform.
It should be noted that the execution subject of the embodiment is a testing device of an automobile exhaust device, and may also be other devices that can achieve the same or similar functions.
In this embodiment, the automobile testing platform is an automobile testing platform, the reliability test of the automobile to be realized can be performed through the automobile testing platform, the reliability test includes a sulfur-resistant test and a carbon accumulation test, and may further include other reliability tests, which are not limited in this embodiment, the sulfur-resistant test is performed under an experimental condition that the automobile testing platform is flexibly adjusted to meet the user requirement, and the sulfur-resistant test is performed under the experimental condition, so as to ensure the accuracy of the test, the carbon accumulation test is performed by burning off soot particles trapped in a Particulate trap DPF (diesel Particulate filter) through periodic regeneration, wherein the DPF is a post-processing device that reduces the Particulate matter in the exhaust through filtration, and the accumulation of the Particulate matter in the DPF can cause the rise of the engine back pressure, which affects the dynamic performance and the economical efficiency of the engine, so that the soot particles trapped in the DPF need to be burned off through periodic regeneration, and regeneration can lead to the inside high temperature that produces of DPF, influence DPF's reliability, therefore, set up regeneration number of times isoparametric information through car experiment platform, thereby realize carrying out the reliability test of tired carbon on the basis of simulation car actual running condition, unit sulphur-fast cycle is a tired sulphur/desulfurization cycle, experiment sulphur content information is for the sulphur content information in the NSC of flowing through in a tired sulphur/desulfurization cycle in car experiment platform, thereby realize the true simulation environment to the car test.
Step S20: and comparing the experimental sulfur content information with target sulfur content information, and adjusting the sulfur additive content in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information.
In this embodiment, the NSC sulfur tolerance test method considers the total amount of sulfur flowing through the NSC in the life cycle, taking N1 vehicles as an example, the life cycle is 16 kilometers, and considering the fuel consumption per kilometer of the vehicle, assuming that 10L and the sulfur content of the national fuel oil is 10ppm, the sulfur content generated by the fuel oil flowing through the NSC in 16 kilometers is 160000 × 10/100/0.84 (diesel density): 10/1000000 is 0.19 g. The engine fuel ratio is calculated according to one thousandth, the sulfur content in the engine oil is calculated according to 0.4%, the engine oil flowing through the NSC within 16 kilokilometers generates the sulfur content of 160000 × 10/100/0.84/1000 × 0.004 ═ 76.19g, the sulfur content flowing through the NSC in the life cycle is 76.38g, the desulfurization period k1 is obtained, the sulfur content of the NSC required to flow through each sulfur accumulation/desulfurization period is b ═ 76.38/k1, and b is used 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 by obtaining experimental sulfur content information, where the experimental sulfur content information can be represented by a, a and b are compared, and the content of a is adjusted according to a comparison result, so that a reaches b.
It can be understood that, selecting the medium-speed and medium-load working condition of the engine, and at the same time, ensuring that the inlet temperature of the NSC is 300 ℃ ± 2 ℃, and being adjusted appropriately according to different NSC coating technologies, the adsorption efficiency of sulfur on the NSC at the temperature can reach more than 95%, measuring the oil consumption and the engine oil consumption of the working condition, setting the duration of a bench sulfur accumulation/desulfurization period as h1, usually performing regeneration of the DPF, performing NSC desulfurization after the regeneration of the DPF is performed for 2 to 3 times, calculating the sulfur content flowing through the NSC in the sulfur accumulation/desulfurization period, actually measuring a, calculating the test operation duration according to the number of sulfur accumulation/desulfurization periods in the actual 16 kilometers of the whole vehicle, wherein the number of sulfur accumulation/desulfurization times k1 is 160000/one driving mileage of the sulfur accumulation desulfurization period, and the sulfur content required to flow through the NSC in each sulfur accumulation/desulfurization period is b is 76.38/k1, wherein the sulfur content of (b-a) is achieved by adding a sulfur-containing additive to the fuel oil.
Step S30: and carrying out a sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information.
In this embodiment, the experimental sulfur additive content information is a sulfur additive that can be added to fuel oil or engine oil, and the experimental environment of the automobile in the experimental platform reaches a real driving environment by adjusting the sulfur additive in the fuel oil or engine oil, so as to realize a real simulation environment of the experimental platform.
According to the scheme, experimental sulfur content information flowing through the automobile exhaust device in a unit sulfur-tolerant period in the automobile experimental platform is obtained; comparing the experimental sulfur content information with target sulfur content information, and adjusting the sulfur additive content 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 experimental platform can reach the optimal sulfur content by adjusting the sulfur additive content in the automobile exhaust device, and the flexibility of realizing the reliability of the aftertreatment system is improved.
Referring to fig. 3, fig. 3 is a schematic flow chart of a second embodiment of the testing method of the automobile exhaust device according to the invention, and the second embodiment of the testing method of the automobile exhaust device according to the invention is proposed based on the first embodiment shown in fig. 2.
In the second embodiment, the feature information of the vehicle-mounted terminal includes identification code information of the vehicle-mounted terminal, and the step S10 includes:
step S101, acquiring fuel 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 information and the engine oil information.
In this embodiment, since the fuel information and the engine oil information both contain sulfur, the total sulfur content information consumed 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 an actual situation.
Step S102, acquiring a first preset driving mileage and a unit driving mileage in a unit sulfur tolerance period, and obtaining the number of times of sulfur tolerance according to the first preset driving mileage and the unit driving mileage in the unit sulfur tolerance period.
It should be noted that the first preset driving range is a total driving range of the automobile in the life cycle, and may be 16 kilometers, and may also be parameter information of other ranges.
And 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 this embodiment, the sulfur content information in a unit sulfur tolerance period is obtained by obtaining the number of times of sulfur tolerance and the total sulfur content information, and the adjustment of the sulfur content information in the unit sulfur tolerance period in the automobile experiment platform is realized by comparing the sulfur content information in the unit sulfur tolerance period with the target sulfur content information.
Further, the step S101 includes:
acquiring fuel 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 consumed total sulfur content information according to the adjusted fuel oil information and engine oil information.
In this embodiment, if the influence of the poor-quality 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 is modified, that is, the adjustment instruction is obtained, the sulfur content information in the fuel information and the engine oil information of the adjustment instruction is extracted, and the fuel information and the engine oil information are adjusted according to the sulfur content information to obtain the adjusted fuel information and engine oil information, so that the fuel information and the engine oil information in the automobile experiment platform are consistent with the actual situation, and flexible adjustment of data in the experiment process is realized.
According to the scheme, the influence of the inferior fuel oil or engine oil on the NSC sulfur tolerance reliability test is considered, and the sulfur content information in the instruction fuel oil information and the engine oil information is adjusted, so that the fuel oil information and the engine oil information in the automobile experiment platform are consistent with the actual situation.
Referring to fig. 4, fig. 4 is a schematic flow chart of 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 provided based on the first embodiment or the second embodiment.
In the third embodiment, the step S30 includes:
in step S301, the number of times of sulfur tolerance and time information of a unit sulfur tolerance period are acquired.
In this embodiment, a bench, i.e., a sulfur accumulation/desulfurization cycle in an automobile test platform, is set to have a duration h1And the test operation time length is calculated according to the number of sulfur accumulation/desulfurization cycles within 16 kilometres of the whole vehicle, and the number of sulfur accumulation/desulfurization times k1 is 160000 per driving mileage of one sulfur accumulation desulfurization cycle, so that the sulfur tolerance times and the time information of the unit sulfur tolerance cycle are obtained.
And S302, obtaining the running time of the experimental sulfur tolerance according to the sulfur tolerance times and the time information of the unit sulfur tolerance period.
In specific implementation, the experimental sulfur tolerance operation time length is obtained by adopting a preset formula according to the sulfur tolerance times and the time information of the unit sulfur tolerance period, wherein the preset formula is the total experimental operation time length h-k 1-h 1, so that the determination of the total operation time length in the automobile experiment platform is realized.
And S303, carrying out a sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information and the experimental sulfur tolerance operation time length.
Further, before the step S302, the method further includes:
acquiring an experimental sulfur accumulation rate; and when the experimental sulfur accumulation rate is smaller than the preset sulfur accumulation 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 sulfur accumulation rate is 1g/h, and may also be information of other parameters, which is not limited in this embodiment, 1g/h is taken as an example to describe, the experimental sulfur accumulation rate and the gantry sulfur accumulation rate b/h are obtained1Less than 1g/h, if more than, h needs to be adjusted1The time length is long, so that the total running time length in the automobile experiment platform is consistent with the actual running time length, and the actual running state is better met.
The step of obtaining the experimental sulfur tolerance operation duration according to the sulfur tolerance times and the time information of the unit sulfur tolerance period comprises the following steps: and obtaining the running time of the experimental sulfur tolerance according to the number of times of sulfur tolerance and the sulfur tolerance time of a target unit, and performing boundary control and sulfur accumulation rate control through obtaining test parameter information in the sulfur tolerance test and the test parameter information so as to realize more flexible sulfur tolerance test.
Further, before the step S30, the method further includes:
and acquiring a second preset driving mileage and a unit driving mileage in a unit carbon-resistant regeneration period, and obtaining the regeneration times according to the second preset driving mileage and the unit driving mileage in the unit carbon-resistant regeneration period.
It should be noted that DPF (diesel Particulate filter) is an aftertreatment device for reducing Particulate Matter (PM) in exhaust gas by filtration, and accumulation of Particulate matter in DPF may increase back pressure of an engine, which may affect dynamic performance and economy of the engine, so that periodic regeneration may be required to burn off soot particles trapped in DPF, and regeneration may cause high temperature inside DPF, which may affect reliability of DPF, so that a carbon tolerance test, i.e., a DPF carbon accumulation test, may be performed before a sulfur tolerance test is performed.
In this embodiment, the second preset driving range is a total driving range of the automobile in the life cycle, and may be 16 kilometers, and may also be other range parameter information.
And obtaining the experimental regeneration operation time according to the regeneration times and the time information of the unit carbon-resistant regeneration period, and carrying out a carbon-resistant 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 regeneration of the carbon accumulated in the DPF, where the regeneration number k2 is 160000/regeneration mileage, sets a rack carbon accumulation/regeneration period duration h2, and a total test operation duration h is k2 h2, generally controls the total duration h to be 800-. Before the test, a smoke intensity test with all characteristics is carried out, the middle-speed medium-load working condition with larger smoke intensity and the DPF inlet not higher than 300 ℃ is selected as the test working condition, and if the DPF inlet is higher than 300 ℃, the DPF passive regeneration rate is increased, so that the carbon accumulation rate is influenced.
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 comprises the following steps:
adjusting the operation parameter information of an electronic control unit, and increasing the current carbon accumulation rate according to the operation parameter information to obtain a target carbon accumulation rate; and adjusting the experimental regeneration operation time length according to the target carbon accumulation rate to obtain the target regeneration operation time length.
The carbon resistance test is carried out on the automobile exhaust device according to the regeneration times and the experimental regeneration operation duration, and 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 tests of the NSC sulfur tolerance reliability and the DPF reliability, simultaneously consider the key elements of the NSC sulfur tolerance test and the DPF reliability test, select the medium-speed and medium-load working condition of the engine, simultaneously ensure that the inlet temperature of the NSC is 300 +/-2 ℃, and properly adjust according to different NSC coating technologies. Through adjusting the proportion of sulfur-containing additives in fuel oil, the sulfur accumulation amount in the h1 time period is b, the sulfur accumulation rate cannot be higher than 1g/h, if the sulfur accumulation rate cannot be higher than 1g/h, the h1 time period needs to be adjusted, through adjusting ECU data, the DPF carbon accumulation and regeneration of one time of DPF can be completed in the h2 time period, the carbon accumulation rate cannot be higher than 10g/h, if the carbon accumulation rate cannot be higher than 10g/h, the h2 time period needs to be adjusted, because desulfurization is carried out after 2-3 times of DPF regeneration, the h1 is 2 or 3 times of h2, the calibration condition is consistent with that of the whole vehicle, and therefore, the synchronous assessment on NSC sulfur tolerance and DPF reliability can be synchronously completed in the same total test time period h.
In the embodiment, both the NSC sulfur tolerance reliability and the DPF reliability are realized by selecting a steady-state engine operating condition to load sulfur and carbon on the NSC and the DPF, and treating the trapped sulfur and carbon at a high temperature. And in the whole vehicle calibration, the desulfurization/regeneration is calibrated according to 1/2 or 1/3, so that the NSC sulfur-tolerant reliability and the DPF reliability can be simultaneously evaluated by adjusting the working condition of an engine, a test boundary, ECU parameters and the like by using a test.
In addition, an embodiment of the present invention further provides a storage medium, where 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, implements the steps of the test method of the automobile exhaust device as described above.
Since the storage medium adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
In addition, referring to fig. 5, an embodiment of the present invention further provides a testing apparatus for an automobile exhaust device, where the testing apparatus for an automobile exhaust device includes:
the acquiring module 10 is configured to acquire experimental sulfur content information flowing through the automobile exhaust device in a unit sulfur tolerance period in the automobile experimental platform.
It should be noted that the execution subject of the embodiment is a testing device of an automobile exhaust device, and may also be other devices that can achieve the same or similar functions.
In this embodiment, the automobile testing platform is an automobile testing platform, the reliability test of the automobile to be realized can be performed through the automobile testing platform, the reliability test includes a sulfur-resistant test and a carbon accumulation test, and may further include other reliability tests, which are not limited in this embodiment, the sulfur-resistant test is performed under an experimental condition that the automobile testing platform is flexibly adjusted to meet the user requirement, and the sulfur-resistant test is performed under the experimental condition, so as to ensure the accuracy of the test, the carbon accumulation test is performed by burning off soot particles trapped in a Particulate trap DPF (diesel Particulate filter) through periodic regeneration, wherein the DPF is a post-processing device that reduces the Particulate matter in the exhaust through filtration, and the accumulation of the Particulate matter in the DPF can cause the rise of the engine back pressure, which affects the dynamic performance and the economical efficiency of the engine, so that the soot particles trapped in the DPF need to be burned off through periodic regeneration, and regeneration can lead to the inside high temperature that produces of DPF, influence DPF's reliability, therefore, set up regeneration number of times isoparametric information through car experiment platform, thereby realize carrying out the reliability test of tired carbon on the basis of simulation car actual running condition, unit sulphur-fast cycle is a tired sulphur/desulfurization cycle, experiment sulphur content information is for the sulphur content information in the NSC of flowing through in a tired sulphur/desulfurization cycle in car experiment platform, thereby realize the true simulation environment to the car test.
Step S20: and comparing the experimental sulfur content information with target sulfur content information, and adjusting the sulfur additive content in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information.
In this embodiment, the NSC sulfur tolerance test method considers the total amount of sulfur flowing through the NSC in the life cycle, taking N1 vehicles as an example, the life cycle is 16 kilometers, and considering the fuel consumption per kilometer of the vehicle, assuming that 10L and the sulfur content of the national fuel oil is 10ppm, the sulfur content generated by the fuel oil flowing through the NSC in 16 kilometers is 160000 × 10/100/0.84 (diesel density): 10/1000000 is 0.19 g. The engine fuel ratio is calculated according to one thousandth, the sulfur content in the engine oil is calculated according to 0.4%, the engine oil flowing through the NSC within 16 kilokilometers generates the sulfur content of 160000 × 10/100/0.84/1000 × 0.004 ═ 76.19g, the sulfur content flowing through the NSC in the life cycle is 76.38g, the desulfurization period k1 is obtained, the sulfur content of the NSC required to flow through each sulfur accumulation/desulfurization period is b ═ 76.38/k1, and b is used 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 by obtaining experimental sulfur content information, where the experimental sulfur content information can be represented by a, a and b are compared, and the content of a is adjusted according to a comparison result, so that a reaches b.
It can be understood that, selecting the medium-speed and medium-load working condition of the engine, and at the same time, ensuring that the inlet temperature of the NSC is 300 ℃ ± 2 ℃, and being adjusted appropriately according to different NSC coating technologies, the adsorption efficiency of sulfur on the NSC at the temperature can reach more than 95%, measuring the oil consumption and the engine oil consumption of the working condition, setting the duration of a bench sulfur accumulation/desulfurization period as h1, usually performing regeneration of the DPF, performing NSC desulfurization after the regeneration of the DPF is performed for 2 to 3 times, calculating the sulfur content flowing through the NSC in the sulfur accumulation/desulfurization period, actually measuring a, calculating the test operation duration according to the number of sulfur accumulation/desulfurization periods in the actual 16 kilometers of the whole vehicle, wherein the number of sulfur accumulation/desulfurization times k1 is 160000/one driving mileage of the sulfur accumulation desulfurization period, and the sulfur content required to flow through the NSC in each sulfur accumulation/desulfurization period is b is 76.38/k1, wherein the sulfur content of (b-a) is achieved by adding a sulfur-containing additive to the fuel oil.
Step S30: and carrying out a sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information.
In this embodiment, the experimental sulfur additive content information is a sulfur additive that can be added to fuel oil or engine oil, and the experimental environment of the automobile in the experimental platform reaches a real driving environment by adjusting the sulfur additive in the fuel oil or engine oil, so as to realize a real simulation environment of the experimental platform.
According to the scheme, experimental sulfur content information flowing through the automobile exhaust device in a unit sulfur-tolerant period in the automobile experimental platform is obtained; comparing the experimental sulfur content information with target sulfur content information, and adjusting the sulfur additive content 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 experimental platform can reach the optimal sulfur content by adjusting the sulfur additive content in the automobile exhaust device, and the flexibility of realizing the reliability of the aftertreatment system is improved.
In one embodiment, the obtaining module is further configured to obtain fuel information and engine oil information consumed under a preset working condition in an automobile experiment platform, and obtain total sulfur content information consumed according to the fuel information and the engine oil information;
acquiring a first preset driving mileage and a unit driving mileage in a unit sulfur-tolerant period, and obtaining the number of times of sulfur tolerance according to the first preset driving mileage and the unit driving mileage in the unit sulfur-tolerant 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 one embodiment, the obtaining module is further configured to obtain information of fuel oil and engine oil 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 consumed total sulfur content information according to the adjusted fuel oil information and engine oil information.
In one embodiment, the test module is further configured to obtain the number of times of sulfur tolerance and time information of a unit sulfur tolerance period;
obtaining the running time of the experimental sulfur tolerance according to the sulfur tolerance times and the time information of the unit sulfur tolerance period;
and carrying out sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information and the experimental sulfur tolerance operation time length.
In one embodiment, the obtaining module is further configured to obtain an experimental sulfur buildup rate;
when the experimental sulfur accumulation rate is smaller than a preset sulfur accumulation rate, adjusting the time information of the unit sulfur tolerance period to obtain a target unit sulfur tolerance duration;
the step of obtaining the experimental sulfur tolerance operation duration according to the sulfur tolerance times and the time information of the unit sulfur tolerance period comprises the following steps:
and obtaining the experimental sulfur-tolerant operation time according to the sulfur-tolerant times and the target unit sulfur-tolerant time.
In an embodiment, the test module is further configured to obtain a second preset driving mileage and a unit driving mileage in a unit carbon-tolerant regeneration period, and obtain the regeneration times according to the second preset driving mileage and the unit driving mileage in the unit carbon-tolerant 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 operating parameter information of the electronic control unit, and increase the current carbon accumulation rate according to the operating parameter information to obtain a target carbon accumulation rate;
adjusting the experimental regeneration operation time length according to the target carbon accumulation 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 for 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 detailed description is omitted.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A test method of an automobile exhaust device is characterized by comprising the following steps:
acquiring experimental sulfur content information flowing through an automobile exhaust device in a unit sulfur-tolerant period in an automobile experimental platform;
comparing the experimental sulfur content information with target sulfur content information, and adjusting the sulfur additive content in the automobile exhaust device according to a comparison result to obtain experimental sulfur additive content information;
and carrying out a sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information.
2. The method for testing an automobile exhaust device according to claim 1, wherein the step of obtaining information of the experimental sulfur content flowing through the automobile exhaust device in a unit sulfur tolerance period in an automobile experimental platform comprises:
acquiring fuel 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 information and the engine oil information;
acquiring a first preset driving mileage and a unit driving mileage in a unit sulfur-tolerant period, and obtaining the number of times of sulfur tolerance according to the first preset driving mileage and the unit driving mileage in the unit sulfur-tolerant 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.
3. The method for testing the automobile exhaust device according to claim 2, wherein the step of 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 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 consumed total sulfur content information according to the adjusted fuel oil information and engine oil information.
4. The method for testing an automobile exhaust device according to any one of claims 1 to 3, wherein the performing a sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information comprises:
acquiring the times of sulfur tolerance and time information of a unit sulfur tolerance period;
obtaining the running time of the experimental sulfur tolerance according to the sulfur tolerance times and the time information of the unit sulfur tolerance period;
and carrying out sulfur tolerance test on the automobile exhaust device according to the experimental sulfur additive content information and the experimental sulfur tolerance operation time length.
5. The method for testing an automobile exhaust system according to claim 4, wherein before obtaining the experimental sulfur tolerance operating time length based on the number of times of sulfur tolerance and the time information per unit period of sulfur tolerance, the method further comprises:
acquiring an experimental sulfur accumulation rate;
when the experimental sulfur accumulation rate is smaller than a preset sulfur accumulation rate, adjusting the time information of the unit sulfur tolerance period to obtain a target unit sulfur tolerance duration;
the step of obtaining the experimental sulfur tolerance operation duration according to the sulfur tolerance times and the time information of the unit sulfur tolerance period comprises the following steps:
and obtaining the experimental sulfur-tolerant operation time according to the sulfur-tolerant times and the target unit sulfur-tolerant time.
6. The method of testing an automobile exhaust device according to any one of claims 1 to 3, wherein before the sulfur tolerance test of the automobile exhaust device based on the experimental sulfur additive content information, the method further comprises:
acquiring a second preset driving mileage and a unit driving mileage in a unit carbon-resistant regeneration period, and obtaining regeneration times according to the second preset driving mileage and the unit driving mileage 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.
7. The method for testing an automobile exhaust device according to claim 6, wherein before the carbon resistance test of the automobile exhaust device according to the regeneration times and the experimental regeneration operation time, the method further comprises:
adjusting the operation parameter information of an electronic control unit, and increasing the current carbon accumulation rate according to the operation parameter information to obtain a target carbon accumulation rate;
adjusting the experimental regeneration operation time length according to the target carbon accumulation rate to obtain a target regeneration operation time length;
the carbon resistance test is carried out on the automobile exhaust device according to the regeneration times and the experimental regeneration operation duration, and 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.
8. A test apparatus for an automobile exhaust device, comprising: a memory, a processor and a test program stored on the memory and running on the processor for a vehicle exhaust device, the test program for a vehicle exhaust device when executed by the processor implementing the steps of the method for testing a vehicle exhaust device according to any one of claims 1 to 7.
9. A storage medium, characterized in that the storage medium stores a test program of an automobile exhaust device, and the test program of the automobile exhaust device is executed by a processor to realize the steps of the test method of the automobile exhaust device according to any one of claims 1 to 7.
10. A testing device for an automobile exhaust device, comprising:
the acquisition module is used for acquiring experimental sulfur content information flowing through the automobile exhaust device in a unit sulfur-tolerant 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 sulfur additive content 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 experimental sulfur additive content information.
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| CN112065540A (en) * | 2020-09-09 | 2020-12-11 | 安徽江淮汽车集团股份有限公司 | NSC desulfurization method |
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| US20190009213A1 (en) * | 2016-01-27 | 2019-01-10 | Scania Cv Ab | Exhaust gas treatment system |
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| US20190009213A1 (en) * | 2016-01-27 | 2019-01-10 | Scania Cv Ab | Exhaust gas treatment system |
| CN110274767A (en) * | 2019-06-28 | 2019-09-24 | 安徽江淮汽车集团股份有限公司 | System reliability judgment method, device, equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112065540A (en) * | 2020-09-09 | 2020-12-11 | 安徽江淮汽车集团股份有限公司 | NSC desulfurization method |
| CN112065540B (en) * | 2020-09-09 | 2021-09-21 | 安徽江淮汽车集团股份有限公司 | NSC desulfurization method |
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