نتایج جستجو برای ' Exhaust gas recirculation '

The strict environmental laws, the cost of oil and its limited resources, have made the engine manufacturers to think of other energy resources rather than oil and its products. In this study the effect of exhaust gas recirculation (EGR) on performance and emission characteristics of a SI engine fueled separately with gasoline, Bio-hydrogen and Bio-ethanol have been compared and discussed. In order to do that the engine has been simulated with a three dimensional computational fluid dynamics (CF...

 The HCCI-DI combustion mode was achieved in a heavy-duty diesel engine using the early pilot injection in the intake stroke and the main injection around compression top dead center (TDC). The effects of pilot injection quantity and EGR rate on HCCI-DI combustion and emissions were investigated. NOx emission has a dramatically decrease as the pilot injection quantity increases, but it is still in a high level that needs to be reduced. The smoke emission has a slight increase with the rise ...

 The work aims not only to exploit the petroleum alternative fuel for relieving the energy crisis, but also to realize the ultra-low emissions of diesel engines fueled with this alternative fuel. The effects of direct coal liquefaction (DCL) on combustion and emissions have been studied in a heavy-duty engine fueled with exhaust gas recirculation (EGR). Two cases of the diesel engine operating condition were studied: 1000 r/min, 110 N m (referred to as Case A) and 1400 r...

Considering hydrogen as a clean alternative fuel for engines, this paper is to develop a procedure to add hydrogen in an intake manifold and to design an exhaust gas recirculation (EGR) system for a direct injection diesel engine. The cylinder gas pressure, air mass flow, fuel mass flow, and emissions (such as CO, CO2, HC, NOX, and smoke) were measured under various engine loads and 0%–40% EGR ratios adjusting the hydrogen-energy-share ratio at 0%–20%, meaning that the energy of hydr...