نویسندگان
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
One of the major goals for manufacturers of turbocharged spark ignited (SI) engines is to increase the knock resistance at high loads. In order to move out of knocking combustion, timing of the spark ignition is retarded, thus limiting the maximum pressure and temperature in the combustion chamber. This is an effective method to eliminate the knock. The negative effect of retarding spark timing is increasing the exhaust gas temperature. In order to reduce the exhaust gas temperature, rich mixtures are normally used. As a result, the fuel consumption increases. The cooled EGR can be used to solve this problem. Using the cooled EGR decreases the pressure and the temperature in the unburned zone. There are a number of different possible architectures, each with its specific characteristics. Main objectives of this study were to quantify the increase the knock resistance and to decrease the enrichment in order to the target stoichiometric operation over the full operating range. All the simulations were carried out in the GT-POWER Software on the EF7-TC engine.
کلیدواژهها [English]
)