Assessment of Residual Mass Estimation Methods for Cylinder Pressure Heat Release Analysis of HCCI Engines with Negative Valve Overlap

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F12%3A00227742" target="_blank" >RIV/68407700:21220/12:00227742 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1115/1.4006701" target="_blank" >http://dx.doi.org/10.1115/1.4006701</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1115/1.4006701" target="_blank" >10.1115/1.4006701</a>

Result language
angličtina
Original language name
Assessment of Residual Mass Estimation Methods for Cylinder Pressure Heat Release Analysis of HCCI Engines with Negative Valve Overlap
Original language description
Increased residual levels in homogeneous charge compression ignition (HCCI) engines employing valve strategies such as recompression or negative valve overlap (NVO) imply that accurate estimation of residual gas fraction (RGF) is critical for cylinder pressure heat release analysis. The objective of the present work was to evaluate three residual estimation methods and assess their suitability under naturally aspirated and boosted HCCI operating conditions: (i) the simple state equation method employs the ideal gas law at exhaust valve closing (EVC); (ii) the Mirsky method assumes isentropic exhaust process; and (iii) the Fitzgerald method models in-cylinder temperature from exhaust valve opening (EVO) to EVC by accounting for heat loss during the exhaust process and uses measured exhaust temperature for calibration. Simulations with a calibrated and validated "virtual engine" were performed for representative HCCI operating conditions of engine speed, fuel-air equivalence ratio, NVO a
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JT - Propulsion, engines and fuels
OECD FORD branch
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Project
<a href="/en/project/ED2.1.00%2F03.0125" target="_blank" >ED2.1.00/03.0125: Acquisition of Technology for Vehicle Center of Sustainable Mobility</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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