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Methodology of diesel particulate filter testing on test bed for non-road engine application

Sala Rafał, Kołek Kamil, Konior Witold

Combustion Engines

2022

R. 61, nr 3

72--79

This paper describes the methodology and test results of diesel particulate filter (DPF) functional testing performed on non-road compression ignition engine application installed on test bed. The scope of work included testing of various DPF regeneration strategies, backpressure and balance point tests and emission performance evaluation during a legislative test cycle. The aim of this study was to observe and investigate the influence of raw exhaust gas parameters on DPF functionality in terms of filtration efficiency, soot loading, type and duration of the regeneration and emission performance. Under investigation was the capability of soot burning rate and fuel penalty. The DPF sample under test was part of the complete exhaust aftertreatment system (ATS) which consisted of: a diesel oxidation catalyst (DOC), a DPF and a selective catalytic reduction system (SCR) with urea dosing and ammonia slip catalyst (ASC). Testing was carried out on a heavy-duty diesel engine installed on a test stand with a dynamic dynamometer and equipped with an emission bench. The test program allowed to assess the engine matching to exhaust aftertreatment system with regard to emissions compliance, in-service operation and necessary engine control unit (ECU) calibration works. The results show the influence of the DPF regeneration strategy on its duration and on the soot mass burn rate. Passive DPF regeneration was a favorable mode of DPF cleaning, due to lack of fuel penalty and lower aging impact on the entire ATS. Optimization of soot flow rate, exhaust gas temperature and the chemistry of the DOC/DPF was further recommended to ensure the long-term durability of the entire system.

Możliwości i perspektywy wykorzystania pasywnej regeneracji filtrów cząstek stałych w silnikach z zapłonem samoczynnym

Oleksiak S., Stępień Z., Szczerski B.

Journal of KONES

2003

Vol. 10, No. 3-4

233-242

W referacie omówiono szkodliwe oddziaływanie emisji cząstek stałych (PM – Particle Matter) w spalinach silników z zapłonem samoczynnym, kierunki prac badawczych podejmowanych w celu ograniczenia tej emisji oraz stosowane już środki zaradcze. Szczególną uwagę poświęcono filtracji spalin i problemom związanym z użytkowaniem filtrów (DPF – Diesel Particle Filter). Pokazano wybrane wyniki badań Instytutu Technologii Nafty nad ciągłą, pasywną regeneracją filtrów, przy zastosowaniu dodatków wprowadzanych do paliwa. Badania prowadzono na stanowisku hamownianym, wyposażonym w krajowy silnik wysokoprężny SWT 11/300/1, wykorzystywany między innymi do napędu autobusów. Przedstawiono możliwości, szanse i zalety wykorzystania pasywnej regeneracji filtrów cząstek stałych w najbliższej przyszłości.

The paper describes harmful effects of particle matter (PM) emission in exhaust gases from diesel engines, the recent scientific research efforts made in order to reduce this problem, as well as already existing solutions. The special attention is paid to an exhaust gases filtration and to the problem of diesel particle filter usage. The paper presents selected results of test conducted in the Institute of Petroleum Processing on continuous, passive filter regeneration with application of fuel additives. The tests were conducted on engine test stand with polish diesel engine SWT 11/300/1, which is employed among others in city buses. Finally, opportunities and advantages of passive PM filter regeneration in coming future are discussed.