Results 11 to 20 of about 200 (149)

Exergetic Evaluation of Speed and Load Effects in Spark Ignition Engines Évaluation exergétique des effets de la vitesse et de la charge dans les moteurs àallumage par étincelle

Oil & Gas Science and Technology, 2012
This study investigates the effects of various operating conditions in spark ignition engines via an exergy analysis. A thermodynamic cycle model including compression, combustion and expansion processes was used for investigation.
Sezer I., Bilgin A.
doaj   +1 more source

Fuel Penalty Comparison for (Electrically) Heated Catalyst Technology Comparaison de l’augmentation de consommation de carburant pour la technologie de catalyseurs chauffés à l’électricité

Oil & Gas Science and Technology, 2010
The conversion efficiency of three way catalytic converters is mainly defined by the temperature range wherein they are operating. Traditionally, ignition retard has been used to reduce the light-off time of the catalyst.
Kessels J. T.B.A., Foster D. L., Bleuanus W. A.J.   +2 more
doaj   +1 more source

Visualisation of Gasoline and Exhaust Gases Distribution in a 4-Valve Si Engine; Effects of Stratification on Combustion and Pollutants Visualisation de la répartition du carburant et des gaz brûlés dans un moteur à 4 soupapes à allumage commandé ; effet de la stratification sur la combustion et les polluants

Oil & Gas Science and Technology, 2006
sAn indirect method to map the burned gases in SI engine has been developed. It is based on visualisation by Laser Induced Fluorescence of the unburned mixture seeded with biacetyl.
Deschamps B., Baritaud T.
doaj   +1 more source

Les émissions par perméabilité à travers les canalisations des véhicules automobiles Emissions Due to Permeation Through the Vehicule Fuel Lines

Oil & Gas Science and Technology, 2006
Un des objectifs de la politique environnementale de l'Union européenne est de réduire les émissions des véhicules automobiles. Les normes Euro 96 et Euro 2000 s'intéressent en particulier aux émissions par évaporation dues à la perméation du carburant à
Dewimille B., Duriez G., Rabilloud J.-M., Bonhoure F., Moulinier P., Beziau C.   +5 more
doaj   +1 more source

A comparative study of the judicial construction of scientific credibility in climate litigation

Review of European, Comparative &International Environmental Law, Volume 33, Issue 2, Page 250-264, July 2024.
Abstract Although the value of climate science in the courtroom is widely acknowledged, few studies have evaluated how judges achieve a scientifically sound grounding for their rulings. Drawing insights from legal culture and science and technology studies, we compare the determination of scientific credibility in leading climate cases in Europe and ...
Mingzhe Zhu, Liyuan Fan
wiley   +1 more source

A Comprehensive Numerical Study on Effects of Natural Gas Composition on the Operation of an HCCI Engine Une étude numérique complète sur les effets de la composition du gaz naturel carburant sur le réglage d’un moteur HCCI

Oil & Gas Science and Technology, 2011
Homogeneous Charge Compression Ignition (HCCI) engine is a promising idea to reduce fuel consumption and engine emissions. Natural Gas (NG), usually referred as clean fuel, is an appropriate choice for HCCI engines due to its suitable capability of ...
Jahanian O., Jazayeri S. A.
doaj   +1 more source

Potentiel des moteurs à mélange pauvre face aux moteurs actuels à réglage stoechiométrique : consommation, émissions, exigence en octane The Challenge to Modern Stoichiometric Engines by the Potential Lean-Burn Engine: Consumption, Emissions, Fuel Requirements

Oil & Gas Science and Technology, 2006
Le moteur à allumage commandé pour application automobile aux États-Unis est généralement dépollué par catalyse trifonctionnelle qui impose un contrôle stoechiométrique du mélange air-carburant.
Douaud A. M., Ecomard A., Guibet J. C., Prigent M.   +3 more
doaj   +1 more source

Le Gaz Naturel Véhicule Natural Gas for Vehicles

Oil & Gas Science and Technology, 2006
Cet article présente le GNV (Gaz Naturel Véhicule). Le GNV a en effet de sérieux atouts, à la fois comme carburant de substitution et comme carburant propre. Ces atouts sont aussi bien économiques que techniques.
De Chauveron S.
doaj   +1 more source

Evaluation of territorial conflicts caused by residential expansion in Bucharest suburban area. Case study: Voluntari City [PDF]

Cinq Continents, 2011
L'évaluation des conflits territoriaux causés par l'expansion résidentielle dans la zone périurbaine de Bucarest. Étude de cas: La ville Voluntari. L’aménagement territorial de l’espace aide les diverses utilisations du terrain à s’associer sans ...
CONSTANTINA ALINA TUDOR
doaj  

Synthetic Or Reformulated Fuels: a Challenge for Catalysis Carburants de synthèse ou reformulés : un défi pour la catalyse

Oil & Gas Science and Technology, 2006
Despite comparative figures for wordwide crude oil and natural gas proven reserves, present time contribution of syngas chemistry to motorfuels remains marginal when the refining industry is faced to main constraints: market demand evolution, stringent ...
Courty P., Chaumette P., Raimbault C.
doaj   +1 more source