Wyniki wyszukiwania - BazTech

1

Method of verifying the emission level of the exhaust components of a special vehicle in relation to EURO III standard in road conditions

Kaźmierczak Andrzej R., Matla Jędrzej

Combustion Engines

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2022

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R. 61, nr 2

89--93

EN

The following article presents the method of verification of EURO III standard in real conditions for special vehicles. The test object qualified as a special vehicle was tested in road conditions along a defined route, and then the obtained measurement results were compared to the exhaust emission standard (EURO III) applicable for this vehicle. A method of comparing the emission factors in road conditions with the indicators obtained on the engine dynamometer was proposed. An AVL mobile exhaust gas analyzers PEMS dedicated for RDE road tests were used in the research.

2

Ranking of toxic compound concentrations as diagnostic parameetrs of marine internal combustion engine

Zadrąg R., Kniaziewicz T.

Polish Maritime Research

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2018

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S 1

234--242

EN

Changing selected engine structure parameters, especially fuel system parameters, affects the emission of harmful compounds in the exhaust gas. Changes in harmful compound emission are frequently ambiguous, as they highly depend on parameters controlling the combustion process. An additional problem is that simple interactions are frequently accompanied with mutual influence of these parameters. Therefore, we can say about different sensitivity of diagnostic parameters to the same excitations coming from the engine structure but executed at different loading states. When the set of diagnostic parameters is numerous and the values of these parameters are similar, there is a real problem with their correct classification, frequently based on subjective assessment by the analyst. In the article, the authors propose a methodology to classify the recorded diagnostic parameters. In earlier works by the authors [4,6,7], the information capacity index method (the Hellwig method) was proposed as the measure of diagnostic parameter sensitivity. Based on this method, a rankling of diagnostic parameters can be created which divides the set of diagnostic variables into stimulators and destimulators. Novel authors’ approach to the presented problem consists in including nominants, i.e. variables with the most favourable value for the analysed aspect of the research, in the set of diagnostic variables. This normalisation of the set is believed to be helpful for making a diagnostic decision free from analyst’s arbitrariness. The zero unitarization method can also be helpful in creating diagnostic tests.

3

Przegląd metod monitorowania reaktorów katalitycznych spalin w aspekcie kontroli ich sprawności

Łączyński J.

TTS Technika Transportu Szynowego

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2012

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R. 19, nr 9

1561--1572, CD

PL

W artykule przedstawiono możliwości diagnozowania reaktorów katalitycznych. Opisano znane metody diagnozowania oraz zwrócono szczególną uwagę na metodę monitorowania reaktora katalitycznego przy wykorzystaniu przyrostu temperatury spalin. Podano przykład realizacji monitorowania tą metoda reaktora. Podano warunki badań oraz zdefiniowano sygnał diagnostyczny. Przedstawiono zależności konwersji składników spalin CO, HC i NOx od aktywności reaktora katalitycznego. Zilustrowano wyniki pomiarów sygnału diagnostycznego w funkcji aktywności reaktora katalitycznego oraz w funkcji konwersji składników spalin CO, HC i NOx. Pracę zakończono analizą i oceną przedstawionych metod diagnozowania reaktora katalitycznego.

EN

The paper presents the possibility of diagnosing catalytic converters. It describes the known methods of diagnosing and pays particular attention to the method of monitoring catalytic converter using the increase of the exhaust gas temperature. The example of monitoring using this converter method, has been given. The test conditions and diagnostic signal have been defined. The relations between the conversion of such exhausts components as: CO, HC and NOx and catalytic converter activity, have been presented. The results of measuring the diagnostic signal as a function of catalytic converter activity and as a function of conversion of such exhausts components as: CO, HC and NOx have been illustrated. The paper ends with the evaluation of the presented methods for the diagnosing catalytic converter.