Title:
DOUBLE-DPF REGENERATION CONTROL METHOD AND APPARATUS, AND ENGINE
Document Type and Number:
WIPO Patent Application WO/2023/134683
Kind Code:
A1
Abstract:
A double-DPF regeneration control method. The method is applied to an engine aftertreatment system comprising double DPFs. The method comprises: when each DPF is detected to be in an active regeneration mode and an upstream temperature sensor of one of the DPFs reports a credibility fault, determining a DPF upstream temperature on the basis of an upstream temperature sensor of the other DPF, and determining a regeneration peak temperature and a maximum temperature gradient in each DPF on the basis of a plurality of internal temperature sensors in each DPF; determining a set value of the DPF upstream temperature according to a mass flow rate of waste gas, a DOC upstream temperature, an SCR upstream temperature, and carbon loading capacity; determining a set value of the maximum temperature gradient according to an HC aging factor, a DOC downstream temperature, and the SCR upstream temperature; and in the active regeneration process of the DPF, controlling the regeneration peak temperature according to the set value of the DPF upstream temperature, and controlling the maximum temperature gradient according to the set value of the maximum temperature gradient, thereby improving the reliability during the double-DPF regeneration. Also related are a double-DPF regeneration control apparatus, and an engine.
Inventors:
WANG ZHIJIAN (CN)
WANG GUODONG (CN)
DU XIANGNING (CN)
FU XIAOLEI (CN)
ZHANG YONG (CN)
LI ZHAO (CN)
TAN ZHIXUE (CN)
WANG XIULEI (CN)
CHU GUOLIANG (CN)
WANG GUODONG (CN)
DU XIANGNING (CN)
FU XIAOLEI (CN)
ZHANG YONG (CN)
LI ZHAO (CN)
TAN ZHIXUE (CN)
WANG XIULEI (CN)
CHU GUOLIANG (CN)
Application Number:
PCT/CN2023/071639
Publication Date:
July 20, 2023
Filing Date:
January 10, 2023
Export Citation:
Assignee:
WEICHAI POWER CO LTD (CN)
International Classes:
F01N9/00
Domestic Patent References:
| WO2017056800A1 | 2017-04-06 |
Foreign References:
| CN114046198A | 2022-02-15 | |||
| CN107747505A | 2018-03-02 | |||
| CN110242390A | 2019-09-17 | |||
| CN101300059A | 2008-11-05 | |||
| CN107831089A | 2018-03-23 | |||
| CN111365099A | 2020-07-03 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW CO., LTD. (CN)
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