ICEF2011-60124 Knock in various combustion modes in a Gasoline-fueled Automotive Engine

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F11%3A00189525" target="_blank" >RIV/68407700:21220/11:00189525 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1115/ICEF2011-60124" target="_blank" >http://dx.doi.org/10.1115/ICEF2011-60124</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1115/ICEF2011-60124" target="_blank" >10.1115/ICEF2011-60124</a>

Jazyk výsledku

angličtina

Název v původním jazyce

ICEF2011-60124 Knock in various combustion modes in a Gasoline-fueled Automotive Engine

Popis výsledku v původním jazyce

Homogeneous charge compression ignition (HCCI) offers great potential for improved fuel economy and dramatically reduced NOx emissions, compared to typical spark ignition (SI) combustion. However the benefits of HCCI are limited to low and medium loads by the simultaneous occurrence of combustion instability and knock at a maximum load that is too low for conventional SI combustion. To provide smooth operation in the intermediate range between HCCI and SI requires alternative combustion strategies. One such strategy is spark-assisted compression ignition (SACI) which uses a spark plug to initiate a flame which consumes a portion of the mixture, followed by autoignition of the remaining charge. This moderates the rapid heat release and allows higher loads to be achieved without exceeding knock and stability limits. In a recent study we have explored this region and have found that spark assist at first dramatically reduces knock as load is raised above the HCCI limit; however with further load increase, knock returns, but in a form which resembles spark ignited knock rather than the HCCI knock. This study investigates in detail the knocking conditions observed in that work.

Název v anglickém jazyce

ICEF2011-60124 Knock in various combustion modes in a Gasoline-fueled Automotive Engine

Popis výsledku anglicky

Homogeneous charge compression ignition (HCCI) offers great potential for improved fuel economy and dramatically reduced NOx emissions, compared to typical spark ignition (SI) combustion. However the benefits of HCCI are limited to low and medium loads by the simultaneous occurrence of combustion instability and knock at a maximum load that is too low for conventional SI combustion. To provide smooth operation in the intermediate range between HCCI and SI requires alternative combustion strategies. One such strategy is spark-assisted compression ignition (SACI) which uses a spark plug to initiate a flame which consumes a portion of the mixture, followed by autoignition of the remaining charge. This moderates the rapid heat release and allows higher loads to be achieved without exceeding knock and stability limits. In a recent study we have explored this region and have found that spark assist at first dramatically reduces knock as load is raised above the HCCI limit; however with further load increase, knock returns, but in a form which resembles spark ignited knock rather than the HCCI knock. This study investigates in detail the knocking conditions observed in that work.

Druh

D - Stať ve sborníku

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

2011

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the ASME 2011 Internal Combustion Engine Division Fall Technical Conference

ISBN

978-0-7918-4442-7

ISSN

1066-5048

e-ISSN

—

Počet stran výsledku

10

Strana od-do

441-450

Název nakladatele

American Society of Mechanical Engineers - ASME

Místo vydání

New York

Místo konání akce

Morgantown

Datum konání akce

2. 10. 2011

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000322089700039