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Methodologies to Control DPF Uncontrolled Regenerations
Technical Paper
2006-01-1090
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Diesel particulate filters (DPF) have been shown to effectively reduce particulate emissions from diesel engines. However, uncontrolled DPF regeneration can easily damage the DPF. In this paper, three different types of uncontrolled DPF regeneration are defined. They are: Type A: Uncontrolled high initial exotherm at the start of DPF regeneration, Type B: “Runaway” or uncontrolled regeneration, which takes place when the engine goes to idle during normal DPF regeneration, and Type C: Uneven soot distribution causing excess thermal stress during normal DPF regeneration.
In this paper, different control strategies are developed for each of the three types of uncontrolled DPF regenerations. These control strategies include SOF control, exhaust flow pattern improvement, as well as EGR control through intake throttling and A/F ratio control. Test results show that uncontrolled DPF regeneration can be prevented and highly efficient and safe DPF regeneration can be achieved using these control strategies.
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Citation
Zhan, R., Huang, Y., and Khair, M., "Methodologies to Control DPF Uncontrolled Regenerations," SAE Technical Paper 2006-01-1090, 2006, https://doi.org/10.4271/2006-01-1090.Also In
References
- Johnson Tim, “Update on Diesel Exhaust Emissions Control Technology and Regulation”, DEER Conference, 8/2004.
- Johnson-Matthey website, http://ect.jmcatalysts.com
- Huang Yiqun, Neely Gary D., Sasaki Shizuo, Leet Jeffrey A. and Stewart Daniel W., “US Tier II Emissions Solutions for Light-Duty Diesel Vehicles”, JSAE 20055447.