Title: Evaluation of various strategies for continuous regeneration of particulate filters

Authors: Hagit Persiko-Karakash, Eran Sher

Addresses: Environmental Engineering Facility, The Pearlstone Center for Aeronautical Studies, Department of Mechanical Engineering, Ben-Gurion University, Israel. ' The Pearlstone Center for Aeronautical Studies, Department of Mechanical Engineering, Ben-Gurion University, Israel

Abstract: Diesel particulate filters are fairly effective in cleaning exhaust gases. However, in order to maintain a clean filter and to keep its flow resistance low, filter regeneration is required. Under full load conditions, the exhaust gas temperature is usually high enough to provide continuous filter regeneration. Under high engine load conditions, this may be attainable by reducing the ignition temperature of the particulates by means of suitable fuel additives, or by means of an appropriate catalytic coating of the relevant filter components. However, under medium- and low-engine loads, the exhaust gas temperature is typically too low and another sensible method has to be considered. Evidently, the minimum required exhaust temperature can be achieved over a fairly wide range of engine operation conditions by using several simple-to-employ means. These include inlet throttling (IAT), inlet pre-heating (IAP), exhaust gas recirculation (EGR), exhaust throttling (EGT), etc.

Keywords: diesel engines; vehicle emissions; DPF; filter regeneration; particulate matter; particulate filters; inlet throttling; inlet pre-heating; exhaust gas recirculation; EGR; exhaust throttling; combustion.

DOI: 10.1504/IJVD.2006.009674

International Journal of Vehicle Design, 2006 Vol.41 No.1/2/3/4, pp.326 - 342

Published online: 04 May 2006 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article