Service aid for SCR (Selective Catalytic Reduction) post-processing system

Abstract

The invention provides a service aid for an SCR (Selective Catalytic Reduction) post-processing system. The service aid comprises a DCU (Dosing Control Unit) linking module, a data monitoring module, a fault code information module, a diagnosis testing module, a characteristic parameter setting module and a calibration module, wherein the DCU linking module is used for linking the service aid and a DCU of the SCR post-processing system; the data monitoring module is used for reading and monitoring operating data of an engine and operating data of the SCR post-processing system and playing a role in troubleshooting fundamental faults through monitoring feedback of the operating data of the engine and the operating data of the SCR post-processing system; a fault list is created in the fault code information module and contains various codes and corresponding fault meanings; the fault code information module is used for reading fault codes from the DCU of the SCR post-processing system and finding out fault meanings corresponding to the fault codes from the fault list according to the fault codes and the fault list; the diagnosis testing module is used for carrying out engine stall diagnosis testing and engine starting diagnosis testing. The service aid can be used for solving most of post-processing system faults on the market.

Description

technical field [0001] The invention relates to a non-air assisted SCR post-processing system, in particular to a service software tool for the SCR post-processing system. Background technique [0002] At present, with the promulgation of China IV emission standards, the number of vehicles equipped with SCR after-treatment systems for exhaust gas purification is gradually increasing. At the same time, the number of after-treatment system failures has gradually increased. For the staff of the service station and 4S shop, due to the lack of knowledge of the SCR post-processing system, it is impossible to find out the cause of the failure in time, which not only reduces the work efficiency, but also delays the valuable time of the car owner. [0003] The traditional SCR system service work is solved through the experience and professional knowledge of the staff. Due to the particularity of the industry, this has caused the disadvantages of untimely after-sales service response...

AI Technical Summary

Problems solved by technology

Since most of the staff at the service station are personnel from the complete vehicle or engine factory, they have limited understanding of exhaust gas after-treatment. In many cases, they can only rely on visual inspection to observe whether there are obvious abnormalities, which cannot ef

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