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

Article dans une revue avec comité de lecture
Author
CLENCI, Adrian
190746 Automotive Department
BIZIAC, Adrian
190746 Automotive Department
PODEVIN, Pierre
DESCOMBES, Georges
NICULESCU, Rodica
190746 Automotive Department
ccDELIGANT, Michael
134975 Laboratoire de Dynamique des Fluides [DynFluid]

URI
http://hdl.handle.net/10985/8926
DOI
10.3390/en6062874
Date
2013
Journal
Energies

Abstract

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.

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