|Autors: Punov, P. B., Milkov, N., Perilhon, C., Podevin, P., Evtimov, T.|
Title: Study on the combustion process in a modern diesel engine controlled by pre-injection strategy
Keywords: diesel engine, combustion, rate of heat release, Vibe function
Abstract: The paper aims to study the combustion process in a modern diesel engine over the engine operating map. In order to study the rate of heat release (ROHR), an automotive diesel engine was experimentally tested using the injection parameters factory defined. The experimental test was conducted over the engine operating map as the engine speed was limited to 2400 rpm. Then, an engine simulation model was developed in AVL Boost. By means of that model the ROHR was estimated and approximated by means of double Vibe function. In all engine operating points we found two peaks at the ROHR. The first is a result of the pilot injection as the second corresponds to the main injection. There was not found an overlap between both peaks. It was found that the first peak of ROHR occurs closely before top dead center (BTDC) at partial load than full load. The ROHR peak as a result of main injection begins from 4°BTDC to 18°ATDC. It starts earlier with increasing engine speed and load.
Copyright Institute of Physics Publishing
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Вид: публикация в международен форум, публикация в реферирано издание, индексирана в Scopus
Въведена от: доц. д-р Пламен Борисов Пунов