Wyniki wyszukiwania - BazTech

1

Preliminary tests on an integrated laboratory control system for the feeding system of a dual - fuel diesel engine and its load

Wierzbicki S., Śmieja M., Piętak A.

Journal of KONES

|

2013

|

Vol. 20, No. 2

393--399

EN

Comprehensive testing of diesel engines currently requires not only a control system for the feeding system of the engine, but also a system ensuring precise control of its load and providing constant measurement conditions. Additionally, it is necessary during the tests to record a considerable number of operating parameters of both the engine and the loading system. The currently available stands for diesel engine tests, the so-called “engine test beds”, are standardly-equipped with special systems controlled using computer applications to ensure the maintenance of the assumed engine operation parameters. For compression-ignition engines, this most often takes place by control of the accelerator pedal position. In this solution, the engine is controlled by the engine controller, which controls the fuel charge based on the measurement of the rotational speed and the accelerator pedal position depending on the assumed control algorithm. The shortcoming of this solution is no possibility of controlling selected fuel feeding parameters, such as fuel pressure or the injection advance angle. This paper presents preliminary tests on an integrated control system for both engine load and the parameters of fuel fed to a compression-ignition engine. The developed control system enables engine test bed control, which, depending on the measurement variant, ensures the maintenance of a constant rotational speed or a constant engine load as well as control of the Common Rail system actuators.

2

Napędo-hamulec

Kossowski Z., Zbierski K.

Napędy i Sterowanie

|

2003

|

R. 5, nr 9

42--44

PL

Przedstawione urządzenie do badania silników spalinowych umożliwia zarówno hamowanie, jak i napędzanie silnika spalinowego z dowolną prędkością obrotową. Urządzenie to, nazwane przez autorów napędo-hamulcem, jest połączeniem trój-fazowego, indukcyjnego silnika elektrycznego z przekształtnikiem, czoperem i rezystorem hamującym. W przypadku pracy urządzenia jako hamulec, moc hamowana może być wytracana w oporniku i zamieniana na ciepło lub oddawana do sieci energetycznej. Urządzenie takie zastosowano w badaniach jednocylindrowego silnika z magnetoelektrycznym rozrządem, w których konieczne było zarówno napędzanie, jak i hamowanie silnika spalinowego. Takich wymagań nie był w stanie spełnić żaden z aktualnie produkowanych hamulców obciążeniowych.

3

A Simulation Method of the Reduction of Nitrogen Oxides Over a Silver Aluminate Catalyst in Static Tests of Combustion Engines

Chłopek Z., Darkowski A.

International Journal of Occupational Safety and Ergonomics

|

2002

|

Vol. 8, No. 2

161--182

EN

The paper presents a proposition of simulation studies of nitrogen oxide catalytic reduction. The method enables estimating the influence of catalytic reactors on ecological properties of engines in static bench tests (e.g., ECE R49, United Nations Economic Commission for Europe [UN/ECE], 2000; Standard No. ISO 8178-4:1996, International Organization for Standardization [ISO], 1996; Merkisz (1998). An algorithm of simulation studies is shown. A model catalytic reactor for selective catalytic reduction is described. Silver aluminate deposited on steel substrate covered with aluminium phosphate is used as a catalyst. Propene is used as a reductant. The results of reactor studies in a chemical lab are presented. A simulation of the influence of catalytic reactor properties on ecological properties of an engine was done. Unitary emission conversion coefficients of nitrogen oxide in a static test ECE R49 were determined.