Particulate matter trap removing failure diagnostic device and method

A particle trap and diagnostic device technology, applied in the diagnostic device of exhaust treatment device, electronic control of exhaust treatment device, machine/engine, etc., can solve the problem of high cost, high risk of system misdiagnosis, and increased system complexity In order to achieve the effects of good environmental applicability, high fault discrimination and high diagnostic reliability

Inactive Publication Date: 2020-10-13
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] ① This method requires the installation of two pressure sensors with high cost;
[0007] ②According to the relevant provisions of OBD in the National VI emission regulations, it is necessary to monitor the faults of the two pressure sensors and the pressure pipelines of the pressure sensors, which greatly increases the complexity of the system, and the workload of diagnostic data calibration is large;
[0008] ③In a low temperature environment, the pressure sensor and the pressure pipeline are easy to freeze, which leads to a high risk of misdiagnosis of the system

Method used

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  • Particulate matter trap removing failure diagnostic device and method
  • Particulate matter trap removing failure diagnostic device and method
  • Particulate matter trap removing failure diagnostic device and method

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Embodiment 1

[0044] This embodiment provides a diagnostic device for removing a particulate matter trap. In this embodiment, the control module is the EMS of a motor vehicle; the diagnostic device for removing a particulate matter trap in this embodiment is set at Existing engine exhaust pipelines include a first temperature sensor disposed near the inlet of the particulate trap and a second temperature sensor disposed near the outlet of the particulate trap, specifically as attached figure 2As shown, the exhaust manifold 1 is connected to the exhaust valve on the cylinder head of the engine, and the three-way catalytic converter 2 is connected to the exhaust manifold 1 through the exhaust pipeline body. The particle trap 3 is installed on the exhaust pipeline body after the three-way catalytic converter 2, and is connected with it through the exhaust pipeline body. Among them, EMS is Engine Management System, which refers to the engine management system.

[0045] In this embodiment, bot...

Embodiment 2

[0052] This embodiment provides a method for diagnosing the removal failure of the particulate matter trap, as shown in the attached image 3 As shown, it is a flowchart of a diagnostic method for removing a particulate matter trap in this embodiment. It can be seen from the drawings that the diagnostic method includes the following steps:

[0053] S1: collecting the inlet temperature of the fluid at the inlet end of the particle trap and the outlet temperature of the fluid flowing out of the outlet end of the particle trap;

[0054] S2: Diagnose whether there is a removal failure of the particulate matter trap according to the inlet temperature and the outlet temperature data.

[0055] In particular, in step S1, preferably when the engine is cold started, the inlet temperature of the fluid at the inlet port of the particle trap and the outlet temperature of the fluid flowing out of the outlet port of the particle trap are collected.

[0056] Wherein, the outlet temperature c...

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Abstract

The invention provides a particulate matter trap removing failure diagnostic device which is used for diagnosing whether a particulate matter trap has a removing failure and comprises a first temperature sensor, a second temperature sensor and a control module; the first temperature sensor is used for gathering the inlet temperature of fluid entering the inlet end of the particulate matter trap; the second temperature sensor is used for gathering the outlet temperature of fluid flowing out of the outlet end of the particulate matter trap; and the control module is used for diagnosing whether the particulate matter trap has a removing failure according to the inlet temperature and outlet temperature data. The invention further provides a particulate matter trap removing failure diagnostic method. According to correlation factors of the inlet and outlet temperature of the particulate matter trap within a certain period of time after cold start of an engine, whether the particulate mattertrap has a removing failure can be judged. The particulate matter trap removing failure diagnostic device is simple in structure and better in environment applicability. The particulate matter trap removing failure diagnostic method is large in failure degree of distinction and high in diagnostic reliability.

Description

technical field [0001] The invention relates to the technical field of exhaust gas post-treatment systems, in particular to a diagnostic device and a diagnostic method for removing faults of particulate matter traps. Background technique [0002] Motor vehicle exhaust is an important factor leading to air pollution, which contains carbon monoxide, nitrogen oxides, and particulate matter (Particulate Matter: PM) that has adverse effects on the human body. PM can be suspended in the air for a long time, pollute the environment and affect human physical and mental health. In order to reduce the emission of particulate matter in the exhaust gas of motor vehicles, a particulate matter trap is usually installed in the exhaust aftertreatment system of the motor vehicle to filter the particulate matter. With the gradual implementation of the National VI emission regulations, the requirements for particulate matter emissions from motor vehicles are becoming more and more stringent, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N11/00
CPCF01N11/00F01N11/002F01N2550/24Y02T10/40
Inventor 潘俊许建昌郭石磊孔德立薛亮
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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