Spark-assisted homogeneous charge compression ignition (HCCI) combustion may be a method to improve the operation of HCCI engines. In the current study, the impact of spark assist on the fundamental properties of ignition and combustion was investigated in a single cylinder, optically-accessible research engine. Early port fuel injection and air preheating were used with indolene fuel in the st...

The use of natural gas (NG) in dual-fuel heavy-duty engines has the potential to reduce pollutant and greenhouse (GHG) emissions from transport sector when compared conventional diesel engines. However, NG composition methane slip are interest because both can adversely affect benefits as an alternative fuel, especially considering GHG emissions. Therefore, this study experimentally investigate...

Abstract The increment in the usage of automobiles is resulting increased greenhouse gases (GHG) emissions continuously and there a substantial need to reduce them effectively. present research work investigates emission behavior waste cooking oil biodiesel doped with CuO nanoparticles during testing Compression Ignition (CI) engines. This investigation based on effective reduction analysis emi...

MARŠÁLEK P., SVOBODOVÁ Z. (2006): Rapid determination of methylmercury in fish tissues. Czech J. Food Sci., 24: 138–142. The aim of the present study was to develop a rapid and inexpensive method for the determination of methylmercury in fish tissues based on GC/ECD instrumentation. The new method is based on acidic digestion in hydrochloric acid and subsequent extraction with toluene. Methylme...

A. Nachawaty,1,2 M. Yang,3 W. Desrat,1 S. Nanot,1 B. Jabakhanji,4 D. Kazazis,5,6 R. Yakimova,7 A. Cresti,8 W. Escoffier,3 and B. Jouault1 1Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-Université de Montpellier, F-Montpellier, France 2Laboratoire de Physique et Modélisation (LPM), EDST, Lebanese University, Tripoli, Lebanon 3Laboratoire National des Champs Magnétiques Intenses (LNCMI-EMFL), ...

A Cummins N14-410 diesel engine was operated on twelve fuels produced by blending methyl tailowate, methyl soyate and ethanol with No.2 diesel fuel. Engine incylinder pressure data were used to evaluate engine performance. Peak cylinder pressures for each fuel blend at all engine speeds were lower than peak pressure for diesel fuel with the exception of the 80 % diesel, 13 % methyl tallowate, a...

The paper presents an analysis of the experimental results direct hydrogen injection in a dual-fuel diesel engine. test object is four-cylinder, four-stroke ADCR An following parameters was carried out: indicated mean effective pressure, peak angle maximum pressure and released heat. Statistical obtained out for each cylinder separately four different doses. Both early late were analyzed. signi...

Multiple-cycle large-eddy simulations (LES) have been performed for an optically accessible, single-cylinder, four-stroke-cycle, spray-guided direct-injection spark-ignition (SG-DISI) engine operating in a stratified globally fuel-lean mode. The combine standard Smagorinsky turbulence model, stochastic Lagrangian parcel method liquid fuel injection and spray modeling, simple energy-deposition m...

Millennium-long summer temperature variations in the European Alps as reconstructed from tree rings C. Corona, J. Guiot, J. L. Edouard, F. Chalié, U. Büntgen, P. Nola, and C. Urbinati CEREGE, UMR 6635 CNRS/Aix-Marseille Univ., BP 80, 13545 Aix-en-provence cedex 4, France IMEP, UMR 6116 CNRS/Aix-Marseille Univ., BP 80, 13545 Aix-en-provence cedex 4, France Swiss Federal Research Institute WSL, Z...