1,720,996 research outputs found
Utilizzo di un codice fluidodinamico per l’analisi della fase di combustione in un motore Diesel ad iniezione indirettafluidodinamico
No full textAnalisi dell'influenza della geometria della camera di combustione sulla evoluzione della fase di combustione in un motore Diesel ad iniezione indiretta mediante un codice fluidodinamico
No full textNumerical study towards smoke-less and NOx-less HSDI diesel engine combustion
No full textThis paper explores the possibility to extend the lowerature combustion concept developed for low load conditions to medium load conditions of HSDI DI Diesel engines. The aim is to understand which is the limit of conventional Diesel combustion towards smoke-lees and NOx-less conditions. The present research is based on numerical simulations performed by using the Kiva-3 code updated with physical sub-models. The combined influence of EGR cooling and EGR rate on combustion characteristics and emission formation is analyzed. Then, possible improvements to mixture formation are discussed with particularly emphasis on the use of multiple injection. The calculations show that smoke-less conditions by lowerature combustion cannot be achieved at medium load and therefore a great role is played by mixture formation. Simulations have revealed that promoting leaner mixtures during spray combustion with further significant benefits on soot engine-out emissions is difficult to accomplish. Copyright © 2002 Society of Automotive Engineers, Inc
Simulazione numerica del circuito di lubrificazione di un motore ad accensione comandata
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Simulazione numerica del circuito di lubrificazione di un motore ad accensione comandata
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