Evaluation of a DPF Regeneration System and DOC Performance Using Secondary Fuel Injection

2009-01-2884

10/06/2009

Event
SAE 2009 Commercial Vehicle Engineering Congress & Exhibition
Authors Abstract
Content
An active diesel particulate filter (DPF) regeneration system is evaluated, which applies secondary fuel injection (SFI) directly within the exhaust system upstream of a diesel oxidation catalyst (DOC). Diesel fuel is oxidized in the presence of a proprietary catalyst system, increasing exhaust gas temperatures in an efficient and controlled manner, even during low engine-out gas temperatures. The exotherms produced by secondary fuel injection (SFI) have been evaluated using two different DOC volumes and platinum catalyst loadings. DOC light-off temperatures were measured using SFI under steady-state conditions on an engine dynamometer. A ΔT method was used for the light-off temperature measurements – i.e., the minimum DOC inlet gas temperature at which the exothermic reaction increases the outlet gas temperature 20°C or greater than the inlet temperature. All four of the DOCs tested exhibited similar exothermic behavior in achieving the 650°C target temperature at selected engine operating conditions. Analysis of an engine-tested DOC by X-ray diffraction, as well as the measurement of its conversion efficiencies for oxidation of CO, C3H6 and NO using a laboratory flow reactor are also reported.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-2884
Pages
7
Citation
Gardner, T., Yetkin, A., Shotwell, R., Kotrba, A. et al., "Evaluation of a DPF Regeneration System and DOC Performance Using Secondary Fuel Injection," SAE Technical Paper 2009-01-2884, 2009, https://doi.org/10.4271/2009-01-2884.
Additional Details
Publisher
Published
Oct 6, 2009
Product Code
2009-01-2884
Content Type
Technical Paper
Language
English