Wyniki wyszukiwania - BazTech

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The influence of the heating time of a catalyst-covered glow plug on the exhaust emissions from a diesel engine

Andrych-Zalewska Monika, Merkisz Jerzy, Pielecha Jacek

Combustion Engines

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2021

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R. 60, nr 1

52--56

EN

The paper discusses the application of an in-cylinder catalyst allowing a reduction of the exhaust emissions from a diesel engine. Its placement in the combustion chamber, the area where the process of combustion takes place, allows reducing the emissions (carbon monoxide, hydrocarbons, particulate matter) ‘at source’. The paper presents the possibilities of boosting the efficiency of catalysts in diesel engines by extending the time of heating of a glow plug (the catalyst applied on the glow plug). The tests were performed for the following conditions: no heating (marked 0+0), glow plug heating for 60 s after engine start (marked 0+60), glow plug heating prior to engine start for 60 s and glow plug heating for 60 s after engine cold start (marked 60+60). An improvement in the efficiency of oxidation of the exhaust components was observed as the glow plug heating time increased.

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Analysis of the efficiency of the in-cylinder catalyst to reduce exhaust emissions during the cold start combustion engine

Merkisz Jerzy, Andrych-Zalewska Monika, Pielecha Jacek

Combustion Engines

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2019

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R. 58, nr 3

38--45

EN

The article concerns the use of an in-cylinder catalyst that allows reducing the exhaust emissions during diesel engine operation. This is an additional method of exhaust emission reduction - however, the active component is placed inside the combustion chamber - hence much closest to the combustion process. This allows reducing the emissions at the very source (catalyst applied on the glow plugs). Such solutions are necessary because the reduction of exhaust emissions from vehicles is a key aspect of reducing the negative impact of transport on the environment.

3

The possibilities and development of in-cylinder catalytic coating

Andrych-Zalewska M.

Journal of KONES

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2017

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Vol. 24, No. 3

7--14

EN

Due to the legal changes in the exhaust emission limits in the European Union meeting the new norms becomes more challenging for car manufacturers. The recent progress in the exhaust aftertreatment technology and commercially available aftertreatment systems. However, as the exhaust, systems become more and more complex the problem of high emissions in many engine-operating points that are not currently a part of the type approval tests remains. The article aims to address the limitations of the oxidation catalysts in current aftertreatment systems, mainly their light-off temperature, by investigating new options for in-cylinder catalysts. Placing the catalytic layer within the combustion chamber avoids a number of problems associated with these catalysts being a part of the aftertreatment system. Engine emission tests have been performed comparing the effects of using an in-cylinder Pt-Rh catalytic layer in relation to hydrocarbon and nitrogen oxides emissions. The viable methods of producing a catalytic layer on engine components along with the choice of components to use for catalytic surfaces have also been discussed.

4

Wpływ katalizatora wewnętrznego na emisję związków szkodliwych podczas rozruchu silnika spalinowego

Pielecha J., Dobrzyński M., Andrych-Zalewska M.

Autobusy : technika, eksploatacja, systemy transportowe

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2017

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R. 18, nr 12

359--363, CD

PL

W artykule omówiono zastosowanie katalizatora wewnętrznego, pozwalającego na zmniejszenie emisji związków szkodliwych podczas rozruchu silnika spalinowego o zapłonie samoczynnym. Jest to rodzaj systemu oczyszczania spalin - jednakże jego umieszczenie w komorze spalania - a więc najbliżej procesu spalania, pozwala na zmniejszenie zanieczyszczeń u źródła (katalizator został napylony na świece żarowe). Takie postępowanie jest niezbędne, gdyż zmniejszenie zanieczyszczeń z pojazdów jest kluczowym aspektem ograniczania negatywnego oddziaływania transportu na środowisko naturalne. Zaprezentowane wyniki badań podczas rozruchu są częścią prac badawczych nad oceną katalizatora wewnętrznego w różnych warunkach pracy silnika - począwszy od badań statycznych (na hamowni silnikowej), poprzez badania na hamowni dynamicznej, a kończąc na badaniach pojazdów w testach drogowych. Zastosowanie katalizatora wewnętrznego podczas rozruchu silnika, dla którego zmieniano czas grzania świec żarowych, skutkuje kilkuprocentowym zmniejszeniem masy tlenku węgla, węglowodorów, dwutlenku węgla oraz liczby cząstek stałych w rozpatrywanym okresie pomiarowym. Zastosowanie takiego rozwiązania, technicznie możliwego do wprowadzenia w większości pojazdów z silnikami ZS, skutkowałoby mniejszą emisją zanieczyszczeń.

EN

This article discusses the use of an in-cylinder catalyst to reduce exhaust emissions during a diesel engine startup. This is a type of harmful compounds reduction system - however, its placement inside the combustion chamber - and therefore as close as possible to where the combustion process takes place - reduces the creation of polluting compounds at their source (the catalyst is sprayed on the glow plugs). Such solutions are necessary as the reduction of vehicle pollution is a key aspect of reducing the negative environmental impact of transport. The presented results of the engine startup research are a part of the research work on the effects of applying an internal catalytic converter in various engine operating conditions - from static tests (on an engine dynamometer) through dynamic dynamometer tests to vehicle road tests. The use of an internal catalytic converter during engine startup, for which the heating time of the glow plugs has been changed, results in a several percent reduction in the mass of emitted carbon monoxide, hydrocarbons, carbon dioxide and particle number in the measurement period. The implementation of this solution is technically feasible for most vehicles with compression ignition engines, and would result in reduced vehicle emissions.