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Fault diagnosis method, device, vehicle and storage medium of diesel particulate filter

A particle filter and fault diagnosis technology, which is applied to the diagnosis device of the exhaust gas treatment device, the electronic control of the exhaust gas treatment device, and the machine/engine, etc. low sex issues

Active Publication Date: 2020-12-04
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon and oxygen sensor used in this method has high cost and low reliability, and the comparison of the detected value with the empirical value makes the accuracy of the judgment result low

Method used

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  • Fault diagnosis method, device, vehicle and storage medium of diesel particulate filter
  • Fault diagnosis method, device, vehicle and storage medium of diesel particulate filter
  • Fault diagnosis method, device, vehicle and storage medium of diesel particulate filter

Examples

Experimental program
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Embodiment 1

[0030] figure 1 It is a flowchart of a fault diagnosis method for a diesel particulate filter provided in Embodiment 1 of the present invention. This embodiment is applicable to the fault diagnosis of a diesel particulate filter, and the method can be implemented by a fault diagnosis device for a diesel particulate filter. To execute, the device can be realized by means of software and / or hardware, and integrated in the vehicle. Specifically, the method includes the following steps:

[0031] S110. Obtain detection parameter information of the diesel particulate filter.

[0032] Wherein, the detection parameter information includes detection of regeneration times or detection of pressure difference. Diesel particulate filter, also known as diesel particulate filter, is a ceramic filter installed in the exhaust system of a diesel engine to capture particulates in the exhaust and prevent them from entering the atmosphere and polluting the environment. The diesel particulate fil...

Embodiment 2

[0043] figure 2 It is a flow chart of a fault diagnosis method for a diesel particulate filter provided in Embodiment 2 of the present invention. This embodiment is embodied on the basis of the above-mentioned embodiments. The method includes the following steps:

[0044] S210. Obtain detection parameter information of the diesel particulate filter.

[0045] S220. Acquire the dielectric constant of the oil in the engine detected by the oil quality sensor.

[0046] Specifically, in this embodiment, the oil quality sensor is used to detect the dielectric constant of the oil in the engine. Compared with the carbon oxygen sensor, the oil quality sensor can reduce the cost.

[0047] S230. Determine the oil soot content of the engine oil according to the dielectric constant.

[0048] There is a certain relationship between the dielectric constant and the soot content of the engine oil, which can be obtained through a large number of experiments in advance, and the embodiment does...

Embodiment 3

[0066] image 3 A structural diagram of a diesel particulate filter fault diagnosis device provided in Embodiment 3 of the present invention, the device can implement the diesel particulate filter fault diagnosis method described in the above embodiment, specifically, the device includes:

[0067] An information acquisition module 310, configured to acquire detection parameter information of the diesel particulate filter, the detection parameter information including detection of regeneration times or detection of differential pressure;

[0068] Engine oil soot content determination module 320, used to determine the engine oil soot content of the engine oil;

[0069] An actual soot content determining module 330, configured to determine the actual soot content in the diesel particulate filter according to the soot content of the engine oil;

[0070] The fault diagnosis module 340 is configured to perform fault diagnosis on the diesel particulate filter according to the detect...

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Abstract

The embodiment of the invention discloses a fault diagnosis method and device of a diesel particulate filter, a vehicle and a storage medium. The method comprises the following steps of acquiring detection parameter information of the diesel particulate filter; determining soot content of engine oil in an engine; determining actual soot content in the diesel particulate filter according to the soot content of the engine oil; and conducting a fault diagnosis on the diesel particulate filter according to the detection parameter information and the actual soot content so as to obtain a diagnosisresult. Compared with the prior art, according to the fault diagnosis method and device of the embodiment, the actual soot content of the diesel particulate filter is indirectly determined according to the soot content of the engine oil in the engine, and further the fault diagnosis is conducted according to the actual soot content, thus solving the problem that in the prior art a carbon oxygen sensor is used for detecting a front-back pressure difference of the DPF, and further a fault diagnosis is conducted according to the front-back pressure difference, which leads to lower diagnosis precision.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of fault diagnosis, and in particular to a fault diagnosis method, device, vehicle and storage medium of a diesel particulate filter. Background technique [0002] Soot particles are one of the most important pollutants in the exhaust emissions of diesel engines. Diesel particulate filter (Diesel Particulate Filter, DPF) is currently an effective device for reducing the emission of soot particles from diesel engines. With the prolongation of use time, the DPF is prone to failure and cannot filter the soot particles, so that the soot particles are discharged into the atmosphere, pollute the environment, and then affect the emission performance of the vehicle. [0003] In order to detect whether there is a failure of the DPF, the existing technology mainly uses a carbon-oxygen sensor to detect the pressure difference between the front and rear of the DPF, and compares it with an empir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N11/00F02B77/08
CPCF01N11/00F01N11/002F02B77/08Y02T10/40
Inventor 韩俊楠柳国立刘爽赵金山王众张正兴
Owner FAW JIEFANG AUTOMOTIVE CO
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