Service aid of air-assisted type urea metering pump

Abstract

The invention provides a service aid of an air-assisted type urea metering pump. The service aid comprises a metering pump working parameter monitoring module, a metering pump function monitoring module, a metering pump control module, an engine working condition simulation module, a parameter setting and reading module and a CAN connecting module. The service aid is software mounted on a computer, and the computer with the service aid is connected with the air-assisted type urea metering pump through a CAN bus. The metering pump working parameter monitoring module is used for monitoring the working state, the pump rotating speed, the per hour spraying amount, the pump cavity pressure and the pump cavity temperature of the urea metering pump and displaying the parameters on an interface ofthe service aid. The engine working condition simulation module is used for simulating the working condition of an engine, and the urea metering pump works according to the simulated engine working condition. The urea metering pump can be independently controlled, fault diagnosis can be achieved, and urea spraying can be precisely controlled according to the requirements.

Description

technical field [0001] The invention relates to an air-assisted SCR aftertreatment system, in particular to a service software tool for a urea metering pump. 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 post-processing system service work is solved by 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 an...

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 effectively solve the problem.

Although contacting the exhaust gas after-treatment manufacturer can solve the problem, the response speed of the after-treatment service personnel is often not up to the customer's requirements because they are not in the local area, causing customers to complain

[0005] Most of the diagnostic tools on the market are diagnostic instruments, which are not only expensive but also complex in structure, and need to be connected to the controller DCU, which increases service difficulty and service costs for service personnel

Images