A Data-Driven Performance Estimation Method for Engine Aftertreatment Devices

Abstract

The present invention proposes a performance estimation method based on a data-driven engine post-processing device, based on the remote monitoring system of the engine emission control post-processing device to obtain real-time temperature values ​​at the inlet and outlet of the engine post-processing device during use; based on the obtained real-time Temperature big data obtains performance characteristics such as cumulative temperature difference, normalization coefficient, and temperature signal delay time of the post-processing device through a data-driven method; through the correspondence between different performance characteristic values ​​and performance, the performance of the post-processing device can be more accurately identified and fault prediction can be performed . The data-driven engine post-processing device performance estimation method proposed by the present invention can make full use of real-time state data and historical data to quickly and accurately predict the performance of the engine post-processing device, diagnose the form and degree of failure, and the method is less affected by working conditions , which can be better applied in practical post-processing diagnosis and performance estimation.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a performance estimation method of a data-driven engine aftertreatment device. Background technique [0002] As one of the efficient power sources, the engine is widely used in transportation, construction machinery, agricultural machinery, ships and other fields. With the rapid growth of the number of engines, the problem of engine emission pollution is becoming more and more serious, becoming the main contributor to air pollution emissions, and has become one of the main factors restricting its development, which urgently needs to be solved. In order to comply with China VI and more stringent emission standards, adding after-treatment devices is an inevitable choice for engine emission control. After-treatment devices can effectively reduce engine emissions while ensuring engine performance. Due to the different working principles of gasoline engines and diesel eng...

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Problems solved by technology

[0006] At present, the on-board diagnostic system has good real-time performance in the diagnosis of vehicle emission control faults. It can detect the corresponding fault immediately and remind the driver through the fault indicator light. However, when the subsystems or components related to the emission control system fail, it may It does not affect the normal operation of the engine, so it is not mandatory to deal with and maintain the fault in time, and the vehicle is still in a state of seriously exceeding the emission standard, failing to achieve the expected goal of reducing vehicle emission control

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