AbstructCylinder pressure is an important parameter in engine combustion analysis or engine diagnosis. An approach is introduced to estimate cylinder pressure and combustion heat release in multicylinder SI engines based solely on engine speed measurements. Because of the nonlinear nature of engines, this estimation employs a nonlinear observer: the Sliding Observer. In many applications, cylin...

The upcoming stringent emission regulations and the depletion of oil resources have led to the development of alternate energy sources. In the present study the performance and emission characteristics of a singlecylinder directinjection diesel engine under neat diesel operation and blends of alternative fuels with pure diesel are examined. The hot outlet water from the engine was circulated in...

in internal combustion engines, only about a third of the total fuel input energy is converted into useful work. if the energy rejected into the cooling system and the exhaust gases could be recovered instead and put into useful work, fuel economy would have been substantially improved. the main aim of this research paper was to evaluate the effects of the hybrid nano-catalyst containing cerium...

The unavoidable irreversible loss of power in a heat engine is found to be of quantum origin. Following thermodynamic tradition a model quantum heat engine operating in an Otto cycle is analyzed, where the working medium is composed of an ensemble of harmonic oscillators and changes in volume correspond to changes in the curvature of the potential well. Equations of motion for quantum observabl...