بررسي تجربي تاثير دماي سيال EGR در عملكرد و آلايندگي موتورهاي S-I

Experimental Investigation of EGR Fluid Temperature Effect on Performance and Pollutants in S-I Engine

Vehicles are one of the major source of the environment pollution, particularly the air. The safety of the human being and all other creatures would be in serious danger if the amount of pollutants in air are not controlled. Exhaust gas recirculation is one of the common methods of reducing nitrogen oxides pollutants. In this experimental research work, in order to reduce the amount of NO pollutant further, and for reducing its negative effects on engine performance, cold EGR was investigated in a 1725" spark ignited automotive engine of Iran Khodro. The engine equipped with the EGR circuit went under comprehensive test of performance and pollutant evaluation. The results of the experiments showed that the power and torque losses for the experiments in which cold EGR was used were less than that of hot EGR. Moreover the amount of NO pollutant were reduced further for the cold EGR experiments. The optimum amount and temperature of EGR under test condition were 8% and 430K respectively.