NOx Emissions with Application of the Atkinson and the Miller Cycles at Partial Load with Mixture Heating

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F12%3A00202133" target="_blank" >RIV/68407700:21220/12:00202133 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

NOx Emissions with Application of the Atkinson and the Miller Cycles at Partial Load with Mixture Heating

Popis výsledku v původním jazyce

The objective of this work is an investigation of NOx emissions in application of both well-known techniques, i.e. the modified Atkinson working cycle with a late intake valve closing (LIVC) and the Miller working cycle with an extreme early intake valveclosing (EIVC) in comparison to the Otto cycle at part load (throttled) with heating of working fluid (mixture) in intake. As known, application of the Atkinson and the Miller cycle causes a decrease in the in-cylinder charge temperature before the compression stroke. However, in-cylinder charge temperature at the beginning of the combustion is also decreased in case of a constant value of geometric compression ratio. Combustion is then slower (compared to a standard Otto cycle) and indicated efficiency could be negatively influenced. To avoid this, mixture can be heated in intake manifold of the engine. NOx emissions, however, could be increased in this way in consequence of higher charge temperature during combustion. A commercial 1-

Název v anglickém jazyce

NOx Emissions with Application of the Atkinson and the Miller Cycles at Partial Load with Mixture Heating

Popis výsledku anglicky

The objective of this work is an investigation of NOx emissions in application of both well-known techniques, i.e. the modified Atkinson working cycle with a late intake valve closing (LIVC) and the Miller working cycle with an extreme early intake valveclosing (EIVC) in comparison to the Otto cycle at part load (throttled) with heating of working fluid (mixture) in intake. As known, application of the Atkinson and the Miller cycle causes a decrease in the in-cylinder charge temperature before the compression stroke. However, in-cylinder charge temperature at the beginning of the combustion is also decreased in case of a constant value of geometric compression ratio. Combustion is then slower (compared to a standard Otto cycle) and indicated efficiency could be negatively influenced. To avoid this, mixture can be heated in intake manifold of the engine. NOx emissions, however, could be increased in this way in consequence of higher charge temperature during combustion. A commercial 1-

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JT - Pohon, motory a paliva

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

MECCA Journal of Middle European Construction and Design of Cars

ISSN

1214-0821

e-ISSN

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Svazek periodika

10

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

9

Strana od-do

44-52

Kód UT WoS článku

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EID výsledku v databázi Scopus

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