DPF differential pressure characteristic self-learning method and system

• Main Authors: TENG JIAXIN, ZHENG SHIKUI, SU GUOLIANG, ZHANG XIJIE
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2024
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

The invention provides a DPF differential pressure characteristic self-learning method and system, and relates to the technical field of diesel engine aftertreatment. Comprising the steps that when the initial accumulated operation time is larger than a set value, the differential pressure flow resistance characteristic mapA of the DPF is calculated, the quotient value of the mapA and the initial map serves as a correction coefficient a, and a carbon load value obtained based on the initial map is corrected; whether DPF regeneration is conducted or not is judged; the operation time is accumulated again after the DPF is regenerated, when the operation time accumulated again is larger than a set value, the differential pressure flow resistance characteristic mapB of the DPF is calculated again, the quotient value of the mapB and the initial map serves as a correction coefficient b, and the carbon load value obtained based on the initial map is corrected; on the basis of the difference value between the mapB and