Idle Operation with Low Intake Valve Lift in a Port Fuel Injected Engine

Reducing fuel consumption is a prime objective in the automotive industry in order to meet regulatory and customer demands. Variable valve actuation offers many opportunities for improving the spark ignition engine’s performance in areas such as fuel economy and pollutant emissions. Our studies reve...

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Bibliographic Details
Published inEnergies (Basel) Vol. 6; no. 6; pp. 2874 - 2891
Main Authors Clenci, Adrian, Bîzîiac, Adrian, Podevin, Pierre, Descombes, Georges, Deligant, Michael, Niculescu, Rodica
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.06.2013
MDPI
Subjects
cyclic dispersion
Energy consumption
Energy efficiency
Engineering Sciences
Engines
Flow velocity
fuel economy
idle operation
intake valve lift/law
France
Romania
idle operation
fuel economy
cyclic dispersion
intake valve lift/law
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Summary:Reducing fuel consumption is a prime objective in the automotive industry in order to meet regulatory and customer demands. Variable valve actuation offers many opportunities for improving the spark ignition engine’s performance in areas such as fuel economy and pollutant emissions. Our studies revealed that the ability to control maximum intake valve lift does indeed offer the ability to control intake air mass, but also has the added benefit that it improves the fuel-air mixing process thanks to an increased turbulence, caused by the increased intake flow velocity. This is particularly important at idle and low part loads when low maximum lifts are to be used for improving the fuel economy or for achieving the required power. The paper focuses on the experimental results obtained when approaching idle operation with different intake valve laws. Results indicating the potential of using low intake valve lift for fuel economy and cyclic dispersion improvement are presented in this paper.
ISSN:1996-1073
1996-1073
DOI:10.3390/en6062874