Idle Operation with Low Intake Valve Lift in a Port Fuel Injected Engine
TypeArticles dans des revues avec comité de lecture
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.
Showing items related by title, author, creator and subject.
Investigation on the mixture formation, combustion characteristics and performance of a Diesel engine fueled with Diesel, Biodiesel B20 and hydrogen addition ALDHAIDHAWI, Mohanad; CHIRIAC, Radu; BĂDESCU, Viorel; DESCOMBES, Georges; PODEVIN, Pierre (ELSEVIER, 2017)An experimental and numerical study was performed to investigate the impact of Biodiesel B20 (blends 20% Rapeseed methyl ester with 80 % Diesel volumetric fraction) and different energetic fractions of hydrogen content ...
PUNOV, Plamen; LACOUR, Stéphanie; PÉRILHON, Christelle; PODEVIN, Pierre; DESCOMBES, Georges; EVTIMOV, Teodossi (SAGE Publications, 2015)The paper presents an analysis of the possibilities of exhaust gas heat recovery for a tractor engine with an output power of 110 kW. On the basis of a literature review, the Rankine cycle seems to be the most effective ...
Impact of Biodiesel Blends and Di-Ethyl-Ether on the Cold Starting Performance of a Compression Ignition Engine CLENCI, Adrian; NICULESCU, Rodica; DANLOS, Amélie; IORGA-SIMĂN, Victor; TRICĂ, Alina (MDPI, 2016)The use of biodiesel fuel in compression ignition engines has the potential to reduce CO2, which can lead to a reduction in global warming and environmental hazards. Biodiesel is an attractive fuel, as it is made from ...
FERRARI, Laurence; MALBURET, François; DESCOMBES, Georges (2012)La présente invention concerne un dispositif (10) de largage et de récupération d'un drone (5) apte à être fixé à un aéronef. Ce dispositif comporte un moyen d'accueil (20) d'un drone (5), ce moyen d'accueil (20) étant ...
KRIMI, Abdelkader; KHELLADI, Sofiane; NOGUEIRA, Xesús; DELIGANT, Michael; ATA, Riadh; REZOUG, Mehdi (ELSEVIER, 2018)In this work, a weakly compressible smoothed particle hydrodynamics (WCSPH) multiphase model is developed. The model is able to deal with soil-water interactions coupled in a strong and natural form. A Regularized Bingham ...