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Parameter selection and optimization method for diesel particulate filter

A particle filter and parameter selection technology, which is applied in design optimization/simulation, complex mathematical operations, special data processing applications, etc., can solve the problems of insufficient consideration of parameters and the inability to realize the optimal selection of diesel engine particle filter, and achieve The overall effect of influencing factors

Pending Publication Date: 2021-01-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The parameters considered in the above existing technologies are not comprehensive enough, and it is impossible to realize the optimal selection of the parameters of the diesel particulate filter

Method used

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  • Parameter selection and optimization method for diesel particulate filter
  • Parameter selection and optimization method for diesel particulate filter
  • Parameter selection and optimization method for diesel particulate filter

Examples

Experimental program
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Effect test

Embodiment

[0049] This embodiment provides a method for selecting and optimizing parameters of a diesel particulate filter, including the following steps:

[0050] Step S1: Obtain the parameters and target characteristics of the diesel particulate filter, and use the orthogonal test to obtain the target characteristic values ​​under different parameter combinations; the orthogonal test is based on the engine bench test method, and the parameters include structural parameters and catalyst parameters. The structural parameters include Wall thickness, pore density and porosity, catalyst parameters include catalyst loading and catalyst ratio; target characteristics include PM emission reduction efficiency, PN emission reduction efficiency and front-to-back pressure difference; PM emission reduction efficiency E PM for:

[0051]

[0052] Among them, F PM,engine Indicates the diesel engine PM emission factor, F PM,DPF Indicates the PM emission factor after the diesel particulate filter; ...

specific example

[0081] (1) Determine the design variables of diesel particulate filter

[0082] First, determine the diesel particulate filter design variables. Diesel particulate filter design variables include structural parameters and catalyst parameters. In terms of structural parameters, the more commonly used optimization parameters include wall thickness, pore density, porosity, etc.; in terms of catalysts, the performance of diesel particulate filters is significantly affected by the catalyst loading and the Pt / Pd ratio (catalyst ratio). Therefore, the wall thickness (ω), pore density (σ) and porosity (ε) are selected as the structural parameters of the diesel particulate filter, and the catalyst loading and catalyst ratio are selected as the catalyst parameters.

[0083] (2) Determine the target characteristics

[0084] Particulate matter emission reduction performance and back pressure characteristics are the most important performance of diesel particulate filter. When optimizin...

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Abstract

The invention relates to a parameter selection and optimization method for a diesel particulate filter, which comprises the following steps of: obtaining parameters and target characteristics of a diesel particulate filter, and obtaining target characteristic values under different parameter combinations by adopting an orthogonal test; based on the different parameter combinations and the target feature values under the different parameter combinations, calculating a correlation degree between the parameters and the target features by adopting a grey correlation degree; and selecting parameters of the diesel particulate filter according to the correlation degree. Compared with the prior art, the parameters are comprehensively considered. The number of tests is reduced, and optimal selection of the parameters of the diesel particulate filter is achieved.

Description

technical field [0001] The invention relates to the field of diesel engine particulate traps, in particular to a parameter selection and optimization method for diesel engine particulate traps. Background technique [0002] Diesel particulate filter (DPF) is the most effective way to purify diesel particulate emissions, and has been widely used in exhaust purification of diesel vehicles. The DPF carrier is usually a wall-flow structure. There are many parallel channels inside the carrier. One of the two adjacent channels has only the inlet open, and the other only has the outlet open. The exhaust gas flows in from the channel with the inlet open and passes through the wall of the carrier to The adjacent channel is discharged. During this process, the particulate matter is filtered in the channel to purify the exhaust gas. It is an indispensable after-treatment device for diesel engines to meet the latest emission regulations. [0003] Usually, precious metals such as Pt and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F17/16
CPCG06F30/20G06F17/16
Inventor 张允华楼狄明谭丕强胡志远房亮
Owner TONGJI UNIV
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