Dpf regeneration control method and system based on carbon load dynamic modeling and accurate estimation

Abstract

This invention relates to the field of diesel engine exhaust aftertreatment technology, specifically to a DPF regeneration control method and system based on dynamic modeling and precise estimation of carbon load. The control method of this application includes: S1, regeneration triggering: when the CDPF carbon load reaches a first threshold, the heating device is activated and the exhaust is switched to the regeneration channel; S2, regeneration start-up and initial monitoring: when the exhaust temperature in the regeneration channel reaches a second threshold, regeneration is determined to have started, the initial carbon load is recorded, and exhaust parameters are monitored in real time; S3, dynamic control of the regeneration process: based on real-time parameters, the cumulative carbon soot consumption is calculated, and the remaining carbon load is updated in conjunction with carbon soot mass balance; S4, regeneration termination and recovery: when the remaining carbon load drops to the second threshold, heating is stopped and the main channel is restored. This invention achieves precise closed-loop control through dynamic carbon load modeling, avoiding catalyst thermal damage, extending CDPF life, and ensuring efficient system operation.

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