Diagnosis method and system for performance degradation of gasoline vehicle particulate filter

A technology of a particle filter and a diagnosis method, which is applied in the field of diagnosis of performance deterioration of a particle filter of a gasoline vehicle, can solve the problems of large calibration workload, low diagnosis reliability, inconvenient layout, etc., and achieves high diagnosis reliability, The effect of less calibration workload and lower cost

Active Publication Date: 2021-12-14
DONGFENG MOTOR CORP HUBEI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Execution units need to be installed, which is inconvenient to arrange, high cost to implement, low diagnostic reliability, and heavy calibration workload

Method used

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  • Diagnosis method and system for performance degradation of gasoline vehicle particulate filter
  • Diagnosis method and system for performance degradation of gasoline vehicle particulate filter
  • Diagnosis method and system for performance degradation of gasoline vehicle particulate filter

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Embodiment Construction

[0048] Reference will now be made in detail to specific embodiments of the invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the invention to the described embodiments. On the contrary, it is intended to cover alterations, modifications and equivalents as included within the spirit and scope of the invention as defined by the appended claims. It should be noted that the method steps described here can all be realized by any functional block or functional arrangement, and any functional block or functional arrangement can be realized as a physical entity or a logical entity, or a combination of both.

[0049] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embo...

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Abstract

The invention discloses a method and a system for diagnosing the performance deterioration of a gasoline vehicle particulate trap, belonging to the technical field of engine particulate traps. The method for diagnosing the performance degradation of the particle filter of gasoline vehicles provided by the embodiment of the present invention includes the following steps: obtaining the voltage values ​​at the upstream and downstream ends of the particle filter; converting the voltage values ​​at the upstream and downstream ends of the particle filter into a differential pressure value ; Comparing the converted pressure difference value with the preset pressure difference value threshold, and when the pressure difference value does not reach the preset pressure difference value threshold, it is determined that the performance of the particle filter is degraded. The method for diagnosing the particulate filter of gasoline vehicles provided by the embodiment of the present invention can be easily realized only by measuring the voltage values ​​at both ends of the upstream and downstream of the particulate filter and developing corresponding logic software. It does not involve actuators and is easy to arrange. Low cost, high diagnostic reliability, and less calibration workload.

Description

technical field [0001] The invention relates to the technical field of engine particulate traps, in particular to a diagnostic method and system for performance degradation of gasoline vehicle particulate traps. Background technique [0002] A particulate filter (GPF) is an integral and important component of an engine exhaust system. The National VI emission regulations put forward stricter requirements on particulate matter emissions from gasoline vehicles. Compared with the National V regulations, the particle quality limit has dropped by 33%, and a new limit requirement for the number of particulate matter has been added. In order to meet the National VI emission regulations Requirements, new post-processing components - particulate filter (GPF), particulate filter can effectively reduce the emission of particulate matter, can reduce the soot produced by the engine by more than 90%, and then oxidize the captured particles , to regenerate the trap. If the performance of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N11/00F02B77/08
CPCF01N11/002F02B77/083Y02T10/40
Inventor 李京张德全秦龙王恺陈中天
Owner DONGFENG MOTOR CORP HUBEI
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