Bridging the gap between HCCI and SI: Spark-assisted compression ignition

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F11%3A00309418" target="_blank" >RIV/68407700:21220/11:00309418 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.4271/2011-01-1179" target="_blank" >https://doi.org/10.4271/2011-01-1179</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4271/2011-01-1179" target="_blank" >10.4271/2011-01-1179</a>

Result language

angličtina

Original language name

Bridging the gap between HCCI and SI: Spark-assisted compression ignition

Original language description

Homogeneous charge compression ignition (HCCI) has received much attention in recent years due to its ability to reduce both fuel consumption and NO <inf>x</inf> emissions compared to normal spark-ignited (SI) combustion. However, due to the limited operating range of HCCI, production feasible engines will need to employ a combination of combustion strategies, such as stoichiometric SI combustion at high loads and leaner burn spark-assisted compression ignition (SACI) and HCCI at intermediate and low loads. The goal of this study was to extend the high load limit of HCCI into the SACI region while maintaining a stoichiometric equivalence ratio. Experiments were conducted on a single-cylinder research engine with fully-flexible valve actuation. In-cylinder pressure rise rates and combustion stability were controlled using cooled external EGR, spark assist, and negative valve overlap. Several engine loads within the SACI regime were investigated. Heat release analysis of these points showed a distinct region of flame propagation followed by rapid auto-ignition of the remaining charge. With proper control of the combustion variables, this region of flame propagation became larger as load was increased, eventually resembling conventional spark-ignited combustion. Using this strategy, a maximum engine load of ~7.5 bar NMEP was achieved while maintaining good efficiency and complying with emissions regulations. 2011 SAE International.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

—

OECD FORD branch

20301 - Mechanical engineering

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

2011

Confidentiality

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

Name of the periodical

SAE Papers

ISSN

0148-7191

e-ISSN

0148-7191

Volume of the periodical

2011

Issue of the periodical within the volume

04

Country of publishing house

US - UNITED STATES

Number of pages

18

Pages from-to

1-18

UT code for WoS article

—

EID of the result in the Scopus database

2-s2.0-79959834174