DPF active regenerative intake control system and method using scr gas-assisted structure

A technology of active regeneration and control system, which is applied in the direction of electronic control of exhaust gas treatment device, diagnosis device of exhaust gas treatment device, exhaust device, etc. problems, to achieve the effect of reducing use, reducing HC slip, and promoting oxidation

Active Publication Date: 2021-03-26
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of active regeneration of tailpipe fuel injection still has the disadvantages of uncontrollable regeneration, HC slippage, and carrier burn-through caused by high temperature.

Method used

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  • DPF active regenerative intake control system and method using scr gas-assisted structure
  • DPF active regenerative intake control system and method using scr gas-assisted structure
  • DPF active regenerative intake control system and method using scr gas-assisted structure

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Embodiment Construction

[0033] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0034] A DPF active regeneration air intake control system and method using a diesel engine SCR (Selective Catalytic Reduction) gas-assisted structure proposed by the present invention can promote the full oxidation of hydrocarbons (HC) in the DOC and reduce HC slippage. It can effectively control the internal temperature peak of the DPF during active regeneration, and reduce the occurrence of DPF failure; it can increase the evaporation and atomization uniformity of injected fuel before DOC, reduce additional devices, and effectively reduce the cost of diesel engine exhaust af...

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Abstract

The invention relates to a DPF active regeneration gas inlet control system utilizing an SCR gas assisted structure and a method. The method comprises the following steps that a signal acquisition step is performed, wherein acquired signals of a sensor assembly are acquired, and the acquired signals comprise a DOC front oxygen sensor signal Sig-01, a gas exhaust mass flow signal Sig-Qm, a DPF front temperature sensor signal Sig-T1, a DPF rear temperature sensor signal Sig-T2, a DOC front temperature sensor signal Sig-T3 and an SCR rear NOx sensor signal Sig-NOx; a triggering step is performed;a pre-DOC gas supplementing step is performed; and a thermal management step is performed. Compared with the prior art, the DPF active regeneration gas inlet control system utilizing the SCR gas assisted structure and the method have the advantages that the evaporation and atomization effects of injected fuel oil in a gas exhaust tail pipe can be promoted, and the HC combustion efficiency is improved and the like.

Description

technical field [0001] The invention relates to the technical field of diesel engine control, in particular to a DPF active regeneration air intake control system and method using an SCR gas-assisted structure. Background technique [0002] For heavy-duty diesel engines that take regeneration, tailpipe fuel injection is a common active regeneration method, that is, by injecting fuel before the diesel oxidation catalyst (Diesel Oxidation Catalyst, DOC), the temperature rise characteristics of DOC are used to make the DPF (diesel particulate capture). The inlet temperature of the collector, Diesel Particulate Filter) reaches the ignition point of particulate matter (Particulate Matter, PM) (about 550°C), and the PM accumulated inside the DPF is burned. However, this kind of tailpipe fuel injection active regeneration is prone to uncontrollable regeneration, HC slippage, and high temperature causing the carrier to burn through and burn. SUMMARY OF THE INVENTION [0003] The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/023F01N3/22F01N9/00F01N11/00
CPCF01N3/023F01N3/22F01N3/225F01N9/002F01N11/00F01N11/002F01N11/007F01N2560/025F01N2560/026F01N2560/06F01N2560/07F01N2900/1404F01N2900/1411Y02T10/40
Inventor 谭丕强王德源胡志远楼狄明
Owner TONGJI UNIV
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