Improved preconditioning method for particulate filters

A particle filter and filter technology, which is applied in the direction of machines/engines, electronic control of exhaust treatment devices, diagnostic devices of exhaust treatment devices, etc., can solve problems such as reducing filtration capacity, and achieve the effect of improving filtration capacity.

Active Publication Date: 2022-08-02
VOLVO CAR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, like new filters, regenerated filters have an initial reduced filtration capacity

Method used

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  • Improved preconditioning method for particulate filters
  • Improved preconditioning method for particulate filters
  • Improved preconditioning method for particulate filters

Examples

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Embodiment Construction

[0022] Various embodiments of conditioning methods and filter assemblies in accordance with the present disclosure are described in this detailed description. However, the method and filter assembly may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and to extend the scope of the present disclosure fully conveyed to those skilled in the art. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the novelty of the exemplary embodiments presented herein. Throughout the text, the same reference numbers refer to the same elements.

[0023] Generally, filter efficiency depends on the amount of soot loading in the filter. High levels of soot in the filter (ie, particles captured by the filter) result in higher filtration efficiency (ie, fewer particulates in the exhaust filtered airflow...

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Abstract

The present disclosure generally relates to an improved method for performing a conditioning process on a particulate filter, preferably suitable for use in an aftertreatment system arranged downstream of an internal combustion engine. The proposed method provides for adjusting the filter under controlled conditions so that the filter can reach the desired operating state in a more efficient and faster manner. Furthermore, the proposed method also advantageously provides for maintaining a desired operating state, wherein the filtering capacity may be at a usable level.

Description

technical field [0001] The present disclosure relates to a method for performing a conditioning process on a particulate filter of an aftertreatment system. Background technique [0002] Particulate filters have been introduced as requirements for the emission of particulates in exhaust gas from vehicles and other combustion sources have increased. Particulate filters are designed to remove particulates (so-called soot) from exhaust gases before they are emitted into the environment. Particles are stored in the filter. [0003] Filters have different filtration capacities depending on the level of particulates stored in the filter. The new clean filter has relatively low filtration capacity due to the absence of particles in the filter. As the level of particulates in the filter increases, so does the filtration capacity. [0004] However, increasing particulate levels also increases back pressure across the filter, and too much back pressure causes the exhaust passage t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N9/00F01N11/00F01N3/021
CPCF01N3/023F01N9/002F01N11/002F01N2550/04F01N2560/08F01N2560/06F01N2900/0416F01N2900/08F01N2900/1602F01N2900/1606F01N2900/1406F02D41/029F02D41/0235F02D41/1445F02D41/1448F01N9/005
Inventor J·达尔格伦S·杜耐特M·尼尔森
Owner VOLVO CAR CORP
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