8 research outputs found
Development of Automated Calibration Methodology for Last Generation of Diesel Automotive Powertrains
L'abstract è presente nell'allegato / the abstract is in the attachmen
The Daily Texan
Texas Student Medi
Impact of high sulfur fuel and de-sulfation process on a close-coupled diesel oxidation catalyst and diesel particulate filter
The application of more stringent emission regulations for passenger cars in Asian and South American
countries is challenging due to the presence of low-quality diesel fuel, which enhances the risk of
deactivation of aftertreatment systems due to its higher sulfur content. In this context, the impact of high
sulfur fuel on the performance of a close-coupled Diesel Oxidation Catalyst (DOC) and Diesel Particulate
Filter (DPF) was experimentally tested for degreened, sulfated and de-sulfated real size aftertreatment
components, through engine tests carried out on a highly-dynamic engine test rig, allowing to reproduce
the transient operation of the engine and of the aftertreatment system during type approval driving
cycles. In order to assess the impact of sulfur poisoning, a specific poisoning procedure was adopted
which resulted in different sulfur poisoning levels. The impact of different space velocities on degreened,
poisoned and de-sulfated system was examined and compared considering light-off curves for CO and
HC. The poisoned system was found to be worst effected due to increasing space velocities. In addition,
the ability to recover the performance of aftertreatment system after regeneration through a proper
de-sulfation strategy was evaluated with respect to fresh, degreened, catalyst. The aftertreatment system
recovered its efficiency almost completely after the de-sulfation procedure was carried out
Impact of High Sulfur Fuel and De-sulfation Process on a Close-Coupled Diesel Oxidation Catalyst
The application of more stringent emission regulations for pssenger cars in Asian and South
American countries is challenging due to the presence of low quality diesel fuel [1] which
enhances the risk de-activation of aftertreatment systems due to higher sulfur levels [2]. In
this context, the impact of high sulfur fuel on the Diesel Particulate Filter (DPF) and Diesel
Oxidation Catalyst (DOC) performance was experimentally tested for degreened, sulfated and
de-sulfated aftertreatment components. The impact of different space velocities on degreened,
poisoned and de-sulfated system was examined and compared considering light-off curves for
CO and HC