CN114659795A - Bench experiment method for ignition performance of vehicle catalytic converter - Google Patents
Bench experiment method for ignition performance of vehicle catalytic converter Download PDFInfo
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- CN114659795A CN114659795A CN202111469460.5A CN202111469460A CN114659795A CN 114659795 A CN114659795 A CN 114659795A CN 202111469460 A CN202111469460 A CN 202111469460A CN 114659795 A CN114659795 A CN 114659795A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000002474 experimental method Methods 0.000 title abstract description 13
- 230000003197 catalytic effect Effects 0.000 title abstract description 5
- 239000003054 catalyst Substances 0.000 claims abstract description 173
- 238000012360 testing method Methods 0.000 claims abstract description 90
- 238000010998 test method Methods 0.000 claims abstract description 15
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 9
- 231100000719 pollutant Toxicity 0.000 claims abstract description 9
- 238000013461 design Methods 0.000 claims abstract description 6
- 238000011056 performance test Methods 0.000 claims description 15
- 230000032683 aging Effects 0.000 claims description 6
- 230000001052 transient effect Effects 0.000 claims description 6
- 238000007781 pre-processing Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 abstract description 4
- 238000011161 development Methods 0.000 description 7
- 230000018109 developmental process Effects 0.000 description 7
- 238000000746 purification Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000013142 basic testing Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/05—Testing internal-combustion engines by combined monitoring of two or more different engine parameters
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Abstract
The invention provides a bench test method for the ignition performance of a vehicle catalytic converter. The method comprises the following steps: the method comprises the steps of obtaining an old catalyst group and a second new catalyst group, testing the ignition performance of the old catalyst group and the second new catalyst group respectively, obtaining first test data and second test data respectively, wherein the first test data comprise pollutant concentration and temperature data of an outlet of the old catalyst group, the second test data comprise pollutant concentration and temperature data of an outlet of the second new catalyst group, judging whether the first test data and the second test data meet preset test indexes or not respectively, and if yes, then, the performance of the new catalyst group meets design requirements. The catalyst light-off performance can be verified in advance at the initial stage of a vehicle project through the experiment, and the catalyst scheme is confirmed, so that the technical problem that the project is greatly delayed due to insufficient performance of the catalyst is avoided.
Description
Technical Field
The invention relates to the technical field of automobile exhaust purification, in particular to a bench experiment method for the ignition performance of an automobile catalyst.
Background
With the increasing emphasis on environmental issues of automobiles, in order to reduce the value of pollutants discharged from vehicles as much as possible, advanced exhaust aftertreatment technologies need to be adopted in addition to the in-cylinder purification technologies for improving engine combustion, optimizing engine control, and the like. The DOC (diesel oxidation catalyst) is one of the technologies widely applied to diesel engines, the accurate test and evaluation of the DOC performance are key links of development of engine emission control and basic tests of matching and calibration of an emission post-treatment system, and the DOC performance mainly shows the catalytic conversion efficiency of emissions, namely the ignition characteristic, at different gas temperatures.
Therefore, in order to identify the development risk of vehicle projects, optimize the whole development period and reduce the development investment and cost, a bench test method for testing the light-off performance of a catalyst (DOC) is urgently needed and is used for verifying the DOC light-off performance in advance.
Disclosure of Invention
Based on the above, the invention aims to provide a bench test method for the light-off performance of a vehicle catalyst, which is used for verifying the light-off performance of the catalyst in advance.
The invention provides a bench experiment method for the ignition performance of a vehicle catalyst, which comprises the following steps:
acquiring a plurality of new catalysts, performing test grouping on the new catalysts according to a preset requirement, wherein the grouped new catalysts comprise a first new catalyst group and a second new catalyst group, and preprocessing the first new catalyst group according to a preset rule to obtain an old catalyst group meeting the preset rule;
respectively carrying out ignition performance tests on the old catalyst group and the second new catalyst group, and respectively obtaining first test data and second test data, wherein the first test data comprise pollutant concentration and temperature data of an outlet of the old catalyst group, and the second test data comprise pollutant concentration and temperature data of an outlet of the second new catalyst group;
respectively judging whether the first test data and the second test data meet preset test indexes;
if so, the performance of the new catalyst meets the design requirements.
The bench experimental method for the ignition performance of the vehicle catalyst can be used for verifying the ignition performance of the catalyst in advance so as to identify the development risk of vehicle projects. Specifically, the old catalyst group can be quickly obtained by pretreating the first catalyst group; respectively testing the ignition performance of the old catalyst group and the second new catalyst group to obtain first test data and second test data; through comparison of the first test data and the second test data with preset test indexes, whether the purification effect of the tail gas of the engine is qualified or not after the state change of the catalyst from a fresh state to an aged state can be accurately reflected. The catalyst light-off performance can be verified in advance at the initial stage of a vehicle project through the experiment, and the catalyst scheme is confirmed, so that the technical problem that the project is greatly delayed due to insufficient performance of the catalyst is avoided.
In addition, the bench test method for the light-off performance of the vehicle catalyst can also have the following additional technical characteristics:
as a further aspect of the present invention, the step of obtaining a plurality of new catalysts may be preceded by:
the engine bench is established according to the test requirements and comprises a test table board, an engine arranged on the test table board and a data acquisition device connected with the engine and arranged on the test table board.
As a further aspect of the present invention, the step of preprocessing the first new catalyst group according to a preset rule to obtain an old catalyst group meeting the preset rule includes:
and (3) aging the first new catalyst group in an aging furnace with the water content of 10% for 100 hours at the high temperature of 650 ℃ to obtain an old catalyst group corresponding to the first new catalyst group.
As a further aspect of the present invention, the step of performing the light-off performance test on each of the old catalyst group and the second new catalyst group includes:
the second new catalyst set was heated such that the inlet temperature of the second new catalyst set reached 525-.
As a further aspect of the present invention, the step of performing the light-off performance test on the old catalyst group and the second new catalyst group respectively further includes:
and starting the engine, and testing the light-off performance of the old catalyst group and the second new catalyst group when the engine is positioned under a specific test boundary.
As a further aspect of the present invention, the performing the light-off performance test on the old catalyst group and the second new catalyst group respectively includes:
the ignition performance test of the old catalyst group comprises a steady-state working condition test of the old catalyst group and a transient working condition test of the old catalyst group;
the ignition performance test of the second new catalyst group comprises a steady-state working condition test of the second new catalyst group and a transient working condition test of the second new catalyst group;
as a further aspect of the present invention, the preset test indexes are:
the temperature at the outlet of the old catalyst group and the second new catalyst is greater than 600 ℃ and the HC concentration is less than 1500 ppm.
Drawings
FIG. 1 is a flowchart of a bench test method for light-off performance of a vehicular catalyst in a first embodiment of the invention;
FIG. 2 is a flowchart of a bench test method for light-off performance of a vehicular catalyst in a second embodiment of the invention;
the following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The first embodiment is as follows:
referring to fig. 1, a bench test method of light-off performance of a vehicular catalyst in a first embodiment of the invention is shown, the method including steps S11 to S13:
and step S11, obtaining a plurality of new catalysts, carrying out test grouping on the new catalysts according to preset requirements, wherein the grouped new catalysts comprise a first new catalyst group and a second new catalyst group, and preprocessing the first new catalyst group according to preset rules to obtain an old catalyst group which accords with the preset rules.
In this embodiment, it should be noted that before executing this step, the new catalysts should be new catalysts that have not been used, and the purpose of preparing the old catalyst group is to reflect whether the purification effect of the engine exhaust gas is qualified or not after the state change of the catalysts from the new state to the old state, so as to form a comparative experiment,
step S12, will old catalyst group reaches the new catalyst group of second tests the light-off performance respectively, acquires first test data and second test data respectively, first test data includes pollutant concentration and the temperature data of the export of old catalyst group, second test data includes pollutant concentration and the temperature data of the export of the new catalyst group of second.
Step S13, respectively judging whether the first test data and the second test data meet preset test indexes, if yes, the performance of the new catalytic converter meets design requirements.
And judging whether the performance of the new catalyst meets the design requirement, wherein the first test data and the second test data are required to meet the preset test index, and if one of the first test data and the second test data is not met, the performance of the new catalyst does not meet the design requirement.
The bench experimental method for the ignition performance of the vehicle catalyst can be used for verifying the ignition performance of the catalyst in advance so as to identify the development risk of vehicle projects. Specifically, the old catalyst group can be quickly obtained by pretreating the first catalyst group; respectively testing the ignition performance of the old catalyst group and the second new catalyst group to obtain first test data and second test data; through comparison of the first test data and the second test data with preset test indexes, whether the purification effect of the catalyst on the tail gas of the engine is qualified or not after the state change of the catalyst from a fresh state to an aged state can be accurately reflected. The catalyst light-off performance can be verified in advance at the initial stage of a vehicle project through the experiment, and the catalyst scheme is confirmed, so that the technical problem that the project is greatly delayed due to insufficient performance of the catalyst is avoided.
The second embodiment:
referring to fig. 2, a bench test method of light-off performance of a vehicular catalyst in a second embodiment of the present invention is shown, the method including steps S21 to S27:
and step S21, establishing an engine bench according to the test requirements, wherein the engine bench comprises a test table board, an engine arranged on the test table board and data acquisition equipment which is connected with the engine and arranged on the test table board.
Step S22, obtaining a plurality of new catalysts, and grouping the plurality of new catalysts according to a preset requirement, where the grouped new catalysts include a first new catalyst group and a second new catalyst group.
Step S23, the first new catalyst group is preprocessed according to the preset rule to obtain the old catalyst group meeting the preset rule.
The method comprises the following steps of preprocessing a first new catalyst group according to a preset rule to obtain an old catalyst group which accords with the preset rule:
and (3) aging the first new catalyst group in an aging furnace with the water content of 10% for 100 hours at the high temperature of 650 ℃ to obtain an old catalyst group corresponding to the first new catalyst group.
In step S24, the second new catalyst set is heated such that the inlet temperature of the second new catalyst set reaches 525-.
In step S25, the engine is started such that the engine is under a specified test boundary.
The conditions for determining the test boundary include engine emission variation, engine degradation factor, and bench variation.
Step S26, the step of performing the light-off performance test on the old catalyst group and the second new catalyst group respectively includes:
the ignition performance test of the old catalyst group comprises a steady-state working condition test of the old catalyst group and a transient working condition test of the old catalyst group;
the ignition performance test of the second new catalyst group comprises a steady-state working condition test of the second new catalyst group and a transient working condition test of the second new catalyst group;
step S27, detecting whether the temperature at the outlet of the old catalyst group and the outlet of the second new catalyst are higher than 600 ℃ and the HC concentration is lower than 1500ppm, if so, the experiment is successful.
The bench experimental method for the ignition performance of the vehicle catalyst can be used for verifying the ignition performance of the catalyst in advance so as to identify the development risk of vehicle projects. Specifically, the old catalyst group can be quickly obtained by pretreating the first catalyst group; respectively testing the ignition performance of the old catalyst group and the second new catalyst group to obtain first test data and second test data; through comparison of the first test data and the second test data with preset test indexes, whether the purification effect of the catalyst on the tail gas of the engine is qualified or not after the state change of the catalyst from a fresh state to an aged state can be accurately reflected. The catalyst light-off performance can be verified in advance at the initial stage of a vehicle project through the experiment, and the catalyst scheme is confirmed, so that the technical problem that the project is greatly delayed due to insufficient performance of the catalyst is avoided.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (7)
1. A bench test method for the light-off performance of a vehicle catalyst, the method comprising:
acquiring a plurality of new catalysts, carrying out test grouping on the new catalysts according to a preset requirement, wherein the grouped new catalysts comprise a first new catalyst group and a second new catalyst group, and preprocessing the first new catalyst group according to a preset rule to obtain an old catalyst group meeting the preset rule;
respectively carrying out ignition performance tests on the old catalyst group and the second new catalyst group, and respectively acquiring first test data and second test data, wherein the first test data comprises pollutant concentration and temperature data of an outlet of the old catalyst group, and the second test data comprises pollutant concentration and temperature data of an outlet of the second new catalyst group;
respectively judging whether the first test data and the second test data meet preset test indexes;
if so, the performance of the new catalyst meets the design requirements.
2. The bench test method for light-off performance of vehicular catalyst according to claim 1, wherein the step of obtaining a plurality of new catalysts is preceded by:
the engine bench is established according to the test requirements, and comprises a test table board, an engine arranged on the test table board and data acquisition equipment connected with the engine and arranged on the test table board.
3. The bench test method for the light-off performance of a vehicular catalyst according to claim 1, wherein the step of pretreating the first new catalyst group according to a preset rule to obtain an old catalyst group conforming to the preset rule comprises:
and (3) aging the first new catalyst group in an aging furnace with the water content of 10% for 100 hours at the high temperature of 650 ℃ to obtain an old catalyst group corresponding to the first new catalyst group.
4. The bench test method for the light-off performance of a vehicular catalyst according to claim 1, wherein the step of performing the light-off performance test on each of the old catalyst group and the second new catalyst group is preceded by:
the second new catalyst bank was heated such that the inlet temperature of the second new catalyst bank reached 525-.
5. The bench test method for the light-off performance of a vehicular catalyst according to claim 1, wherein the step of performing the light-off performance test on the old catalyst group and the second new catalyst group, respectively, further comprises:
and starting the engine, and testing the light-off performance of the old catalyst group and the second new catalyst group when the engine is positioned under a specific test boundary.
6. The bench test method for the light-off performance of a vehicular catalyst according to claim 1, wherein the performing the light-off performance test on the old catalyst group and the second new catalyst group, respectively, comprises:
the ignition performance test of the old catalyst group comprises a steady-state working condition test of the old catalyst group and a transient working condition test of the old catalyst group;
the light-off performance test of the second new catalyst group comprises a steady-state working condition test of the second new catalyst group and a transient working condition test of the second new catalyst group.
7. The bench test method for the light-off performance of a vehicular catalyst according to claim 1, wherein the preset test indexes are:
the temperature at the outlet of the old catalyst group and the second new catalyst is greater than 600 ℃ and the HC concentration is less than 1500 ppm.
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|---|---|---|---|---|
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2021
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Application publication date: 20220624 |