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

Adrian Clenci, Adrian Bîzîiac, Pierre Podevin, Georges Descombes, Michael Deligant and Rodica Niculescu
Additional contact information
Adrian Clenci: University of Pitesti, str. Tg. din Vale nr. 1, Pitesti 110040, Romania
Adrian Bîzîiac: Renault Group Romania
Pierre Podevin: Le CNAM, LGP2ES-EA21, 292, rue St. Martin, Paris, 75003, France
Georges Descombes: Le CNAM, LGP2ES-EA21, 292, rue St. Martin, Paris, 75003, France
Michael Deligant: Arts et Métiers ParisTech, DynFluid, 151, Boulevard de l'Hôpital, Paris, 75013, France
Rodica Niculescu: University of Pitesti, str. Tg. din Vale nr. 1, Pitesti 110040, Romania

Energies, 2013, vol. 6, issue 6, 1-18

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.

Keywords: fuel economy; cyclic dispersion; idle operation; intake valve lift/law (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2013
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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