Engine particulate purification regeneration control system

Abstract

The invention relates to an engine particulate purification and regeneration control system which can accurately estimate and monitor the carbon black load of a particulate filter so as to determine appropriate regeneration time. In the engine particulate purification and regeneration control system, average noise energy intensity is used to judge whether a signal of a differential pressure transducer is reliable, and when the signal of the differential pressure transducer is reliable, a differential pressure signal of a particulate filter is adopted to calculate the load capacity of the carbon black; when the differential pressure signal is unreliable, a model is adopted to determine the added value of the carbon black load capacity, and accumulation and calculation are performed. Differential pressure noise energy is used to adjust a differential pressure low-pass filtering bandwidth in real time, and the differential pressure signal accuracy after filtering is increased. A carbon black model is constructed by a differential pressure signal after filtering, gas discharge temperature and gas displacement so as to obtain the total load of the particulate filter. The engine particulate purification and regeneration control system further gives thought to the influence of ash content change on carbon black load capacity, the differential pressure change caused by the ash content is calculated to be equivalent carbon black load capacity when the same differential pressure change is caused, and the equivalent carbon black load capacity of the ash content is removed so as to obtain accurate and reliable carbon black load capacity.

Description

technical field [0001] The invention relates to an engine particulate purification and regeneration control system, which belongs to the technical field of engine aftertreatment DPF system control. Background technique [0002] The introduction of stricter emission regulations in my country (including restrictions on cost, fuel consumption and pollutants) is becoming a driving force for changes in the engine market. Considering lower particulate emissions, the engine needs advanced after-treatment technology to adapt to it (for example, in recent years due to the use of after-treatment technology NO x and PM content was greatly reduced). Existing engines are equipped with exhaust particulate filters in the exhaust system, the purpose of which is to reduce the amount of particulate matter discharged into the atmosphere. [0003] In order to improve the service life of the exhaust particulate filter, when the particulate trap has accumulated a certain amount of carbon black,...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a control system for engine particulate purification and regeneration, which mainly solves the problem of reliable detection and effective determination of particulate filter carbon black (soot) load, in order to obtain particulate filter When the device is suitable for active regeneration

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