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Energies 2013, 6(6), 2874-2891; doi:10.3390/en6062874

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

1,2,* , 3
1 University of Pitesti, str. Tg. din Vale nr. 1, Pitesti 110040, Romania 2 Le CNAM, LGP2ES-EA21, 292, rue St. Martin, Paris, 75003, France 3 Renault Group Romania 4 Arts et Métiers ParisTech, DynFluid, 151, Boulevard de l'Hôpital, Paris, 75013, France
* Author to whom correspondence should be addressed.
Received: 21 September 2012 / Revised: 28 November 2012 / Accepted: 25 December 2012 / Published: 14 June 2013
(This article belongs to the Special Issue Combined Heat and Power – Strategy and Practice)
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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 fuel economy; cyclic dispersion; idle operation; intake valve lift/law
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Clenci, A.; Bîzîiac, A.; Podevin, P.; Descombes, G.; Deligant, M.; Niculescu, R. Idle Operation with Low Intake Valve Lift in a Port Fuel Injected Engine. Energies 2013, 6, 2874-2891.

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