Methodologies to Control DPF Uncontrolled Regenerations
Date Published: 2006-04-03
Paper Number:2006-01-1090
DOI: 10.4271/2006-01-1090
Citation:
Zhan, R., Huang, Y., and Khair, M., "Methodologies to Control DPF Uncontrolled Regenerations," SAE Technical Paper 2006-01-1090, 2006, doi:10.4271/2006-01-1090.
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.
Purchase more technical papers and save! With TechSelect,
you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
Learn more >
