Diesel vehicle tail gas emission on-line monitoring, diagnosis and repair method

Abstract

The invention relates to a diesel vehicle tail gas emission on-line monitoring, diagnosis and repair method. A diesel vehicle comprises a tail gas treatment system. The tail gas treatment system comprises a low-temperature heater, an oxidation type catalyst, a particle catcher and a tail gas pipe bypass. The low-temperature heater, the oxidation type catalyst and the particle catcher are connectedto the tail end of a tail gas pipe of a diesel engine sequentially. The tail gas pipe bypass and the particle catcher are in parallel connection. The diesel vehicle tail gas emission on-line monitoring, diagnosis and repair method comprises the step that an electronic control unit in communication with the tail gas treatment system sends a monitoring starting signal to the tail gas treatment system, wherein the electronic control unit comprises an automatic monitoring module, an automatic diagnosis module and an automatic repair module. The automatic repair module controls the operation condition of the vehicle according to diagnosis information about the condition of the engine and provided by the diagnosis module, and the parameters of the engine are adjusted in a preset repair mode under the diagnosed abnormal condition of tail gas till the effect that the abnormal condition of tail gas changes into the normal condition is confirmed.

Description

technical field [0001] The invention relates to an on-line monitoring, diagnosing and repairing method of diesel vehicle exhaust after-treatment, which can enable car owners, regulatory authorities and manufacturers to remotely monitor the vehicle condition of running vehicles and realize remote on-line monitoring, diagnosis and automatic repair, and belongs to the field of vehicle networking system manufacturing . Background technique [0002] As diesel vehicle exhaust is the main contributor to air pollution, especially PM and NOX pollutants, the current treatment technologies for diesel vehicle exhaust are inseparable from DOC, DPF, and SCR. For the National IV emission standards, the two mainstream technologies The route is EGR+DOC / DPF and SCR. [0003] Chinese patent application CN201510421498.3 discloses an online remote monitoring cloud platform for an ART-Ⅲ type diesel vehicle exhaust after-treatment device, which involves a remote online monitoring of the vehicle c...

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Problems solved by technology

[0004] However, the application does not disclose how to diagnose and automatically repair the faults in the exhaust emission treatment device.

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