Aging prediction method and device for post-processing system

An aging prediction and thermal aging technology, applied in the field of vehicles, can solve the problems of no aftertreatment system aging prediction, inability to identify in advance the aftertreatment system emissions exceeding the standard, etc., to achieve the effect of reducing excessive emissions

Active Publication Date: 2022-04-26
WEICHAI POWER CO LTD
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Problems solved by technology

[0003] At present, the post-processing system is consistent with the default service life of the whole machine, and there is no strategy for predicting the aging of the post-processing system to remind users to replace it in time. Therefore, it is impossible to identify the excessive emissions caused by the aging of the post-processing system in advance

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  • Aging prediction method and device for post-processing system

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[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] The aging prediction method of the aftertreatment system provided by the present invention is mainly aimed at vehicles with DPF (Diesel Particulate Filter, particle trap). When the vehicle has a DPF, the failure mode of the SCR whose catalyst is a copper-based catalyst due to mechanical damage, catalyst covered by ash or exhaust gas pollutants has a very low probability of occurrence, which is not considered in the present invention; it is considered tha...

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Abstract

The present invention provides a post-processing system aging prediction method and device. The method includes real-time statistics of the cumulative duration of the upstream temperature of the SCR in different preset temperature ranges; Multiply the aging rates corresponding to the set temperature ranges to obtain the thermal aging energy in each temperature range; add the thermal aging energy in each temperature range to obtain the thermal aging energy actually received by the SCR; according to the actual thermal aging energy received by the SCR Determine whether the aftertreatment system is thermally aged based on the relationship with the preset thermal aging threshold of the SCR; then, after the thermal aging of the aftertreatment system is determined, a replacement prompt for the aftertreatment system is given. The aging prediction of the after-treatment system is realized, and the user is reminded to replace it in time, which reduces the excessive emission caused by the aging of the after-treatment system.

Description

technical field [0001] The invention relates to the technical field of vehicles, and more specifically, to a method and device for predicting aging of an aftertreatment system. Background technique [0002] The basic working principle of the post-treatment system, that is, the SCR (Selective Catalytic Reduction Technology) system is: the exhaust gas enters the exhaust mixing pipe after it comes out of the turbine. After hydrolysis and pyrolysis reactions, NH3 is generated, and NH3 is used to reduce NOX on the surface of the SCR system catalyst, and N2 is discharged, and excess NH3 is also oxidized to N2 to prevent leakage. [0003] At present, the after-treatment system is consistent with the default life of the whole machine, and there is no strategy for predicting the aging of the after-treatment system to remind users to replace it in time. Therefore, it is impossible to identify the excessive emissions caused by the aging of the after-treatment system in advance. Conte...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N11/00F01N3/20
CPCF01N11/00F01N3/208F01N2550/20F01N2900/1616F01N2610/02F01N2900/0416Y02T10/12Y02T10/40
Inventor 王慧魏京孙善良赵德财
Owner WEICHAI POWER CO LTD
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