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Carbon deposit amount calculation method of diesel engine particulate filter

A particle trap and calculation method technology, which is applied to machines/engines, mechanical equipment, engine components, etc., can solve the problems of inaccurate identification of DPF carbon deposits, and reduce the deterioration of fuel economy and the problem of DPF regeneration and burning. Risks, effects of accurate identification of results

Active Publication Date: 2017-03-08
清华大学苏州汽车研究院(吴江) +1
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Problems solved by technology

[0007] Aiming at the above technical problems, the present invention proposes a method and system for calculating the amount of carbon accumulation of diesel particulate traps, which can calculate different carbon accumulation amounts under different operating conditions of the engine, and through the instantaneous carbon emission of the original engine, gradually Integrating to obtain the final DPF carbon deposit, solving the problem of inaccurate identification of DPF carbon deposit under the traditional pressure difference sensor under low exhaust flow conditions

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  • Carbon deposit amount calculation method of diesel engine particulate filter
  • Carbon deposit amount calculation method of diesel engine particulate filter
  • Carbon deposit amount calculation method of diesel engine particulate filter

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Embodiment

[0032] The preferred embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0033] In this embodiment, by receiving the DOC upstream temperature, DPF upstream temperature, NOx mass flow rate, exhaust gas volume flow rate and mass flow rate, Soot mass flow rate, engine operating mode, regeneration state, exhaust Oxygen content and other parameters, according to the parameters of the engine exhaust system, judge the current state of the engine, the current state includes carbon deposition state, passive regeneration state, active regeneration state, spontaneous regeneration state, and calculate the accumulated carbon deposition in the DPF.

[0034] Engine operation mode includes normal operation mode (that is, carbon deposition state) and regeneration mode, wherein the regeneration mode includes three regeneration states, which are passive regeneration state, active regeneration state, and spontaneous regeneration sta...

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Abstract

The invention discloses a carbon deposit amount calculation method of a diesel engine particulate filter. The method comprises following steps: the running state of an engine is judged, and when the engine is in the passive regeneration state, the Soot mass flow consumed by passive regeneration is calculated; the Soot mass flow consumed by initiative regeneration is calculated, and the Soot mass flow totally consumed by regeneration is obtained; the non-reaction Soot mass flow is calculated, according to judgment of the different running states of a DPF engine and the running state, the different integral initial values are selected, the non-reaction Soot mass flow is subject to integral operation, and the current DPF carbon deposit amount is obtained; the work state of an aftertreatment system is represented through exhaust substance components and exhaust physical parameters, and therefore the DPF carbon deposit amount is identified, and the identification result is more precise.

Description

technical field [0001] The invention relates to the field of post-treatment of diesel engines, in particular to a method for calculating the amount of carbon deposits of a particulate filter for diesel engines. Background technique [0002] Currently, Diesel Particulate Filter (DPF) is recognized as the most effective post-treatment method for diesel particulates. DPF is a filter installed in the diesel engine exhaust system. It mainly uses honeycomb ceramic filter body, ceramic fiber braid, metal honeycomb filter body and metal braid as filter materials. It can capture particulate matter in exhaust gas and can Reduces over 90% of carbon particulates produced by diesel engine operation. Its basic working principle is: the DPF is installed on the exhaust pipe of the diesel engine, the exhaust gas enters the DPF, and the particles will be adsorbed on the filter material, thereby reducing the particulate matter in the exhaust gas; [0003] However, after working for a period ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N11/00
CPCF01N11/00F01N2900/1606Y02T10/40
Inventor 华伦刘海涛朱君君金颖薛惠文王琪
Owner 清华大学苏州汽车研究院(吴江)
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