Integrated control system for automobile exhaust emission

Abstract

The invention provides an integrated control system for automobile exhaust emission. The bottom edge of a support assembly extends to form a bracket, and a frame structure is arranged on the other edge of the support assembly. A urea box is arranged on the bracket, and a liquid level sensor assembly is arranged at the top of the urea box. The side face of the urea box makes contact with the frame structure, a U-shaped fixing plate is arranged at a gap in the frame structure, a urea metering pump is arranged on the U-shaped fixing plate, and an exhaust hole of the urea metering pump is fixed downwards. An electromagnetic heating valve is arranged in the position, located above the urea metering pump, of the gap in the frame structure, and environment temperature sensors are arranged in the position, located below the urea metering pump, of the gap in the frame structure and the two sides of the upper portion of the frame structure as required. DCU aftertreatment control modules are mounted on the left side edge and the right side edge of the frame structure through module mounting supports correspondingly. All the modules are connected through circuits and pipelines for integrated output. The integrated control system has the characteristics of being compact in structure, high in universality, convenient to mount and use, capable of shortening mounting time and trouble shooting and eliminating time, and the like. The usability and popularization of the integrated control system can be greatly improved.

Description

technical field [0001] The invention relates to an automobile exhaust after-treatment system, in particular to an integrated independent control system for automobile exhaust after-treatment components of National IV and higher levels. Background technique [0002] The exhaust emission after-treatment system of the automobile is composed of urea tank (tank) and bracket assembly, urea metering pump, DCU controller, ambient temperature sensor, heating solenoid valve, urea solution nozzle, nitrogen oxygen sensor and exhaust temperature sensor and other components . The post-processing system is that the DCU control system controls the work of the urea metering pump and the opening of the nozzle through the real-time feedback signal data of each sensor to spray urea solution to decompose and react the harmful gas emitted by the combustion of the automobile engine, and realize the purification treatment of automobile exhaust emissions. [0003] Existing automotive post-processin...

AI Technical Summary

Problems solved by technology

Although this arrangement can meet the effect of purification treatment of automobile exhaust emissions, the management of the warehouse is messy, the components are damaged and lost frequently, and the installation process of the production line increases. The vehicle manufacturer randomly arranges the installation position of each unit component, so the installation of each unit component is chaotic and inconsistent

With different models, the layout of each unit component changes greatly, and the increase in the amount of changes in the chassis wiring harness of the vehicle is more likely to cause problems, resulting in instrument failure alarms

Due to the many and complex wiring harnesses of the chassis and body of the vehicle, it is difficult to find the fault point and analyze the cause of the fault, which prolongs the troubleshooting time and makes it difficult to find and disassemble the components of each unit.

[0004] The reason for the above disadvantages is that the post-processing system is delivered in parts to the vehicle manufacturer for loading, and the technicians of the vehicle manufacturer determine the installation position of each component according to the mounting hole position of the vehicle frame and the vacant position on the vehicle frame. , and the scattered installation of each unit part is also caused by the problem that the post-processing system is not integrated and supplied

If a fault is reported on the dashboard or the fault light is on, the vehicle manufacturer will ask the after-processing supplier to solve it. Any part of the vehicle circuit is wrongly connected or short-circuited, and the pin of the circuit connector of any unit component is wrong or not inserted properly. Or the wiring is reversed, the installation of the sensor is improperly tightened or damaged, which may affect the post-processing work or fault alarm. In order to eliminate the fault, the post-processing service personnel often spend a long time or even several days to find and detect the entire vehicle frame. and all the lines of the car body, the cause of the failure was analyzed, and the results were all caused by problems such as wrong connection of the whole vehicle line, short circuit, no connection, open circuit, or the quality of the instrument panel and the program did not match. A lot of precious time was wasted, and unconditional As a voluntary inspector of the wiring harness manufacturer and instrument manufacturer, sometimes it is necessary to check and measure the breaks on the wiring harness. This is not only not allowed by the vehicle manufacturer, but also lays the groundwork for the service life of the wiring harness and new faults in the future. Hidden danger

During the loading process, it was found that some sensors were randomly bundled on the wire harness, making the signal induction insensitive; some reversed the pump body, which easily made muddy water enter the pump body; Some bend the urea tube flat to block the flow; some place the sensor at the junction of the inner groove of the frame and the crossbeam. Some reversed the position of the engine transmission signal line and the inspection line, some reversed the high and low pins of the engine transmission signal line, and some connected the post-processing power line to the ECU...the post-processing system had no power or could not receive the engine signal and not working

[0005] The DCU control system for urea liquid supply injection and signal acquisition is the core part of the automobile exhaust after-treatment system, and also the core part of the automobile ECU control unit. If any part fails, the emission control system will not work, which will inevitably affect the engine torque limit. At the same time, a large number of harmful exhaust emissions cannot be controlled, and it will also cause serious pollution to the atmospheric environment

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