Effects of the Exhaust System on the Performance of a Turbocharged Diesel Engine

Based on the CA6DL turbocharged diesel engine, the engine model was built in GT-POWER and validated with the test data. Both the MPC exhaust system and constant pressure exhaust system models were built and compared with the three pulse exhaust system. It was indicated that suitable exhaust pipe diameter could not only reduce the fuel consumption of engine but also enhance the power and efficiency of turbine. The result comparisons also show that the three exhaust systems have different influences on the performances of the engine and the turbine. At engine full load conditions, the performance of the engine with the pulse exhaust system is better than the engines with both MPC and constant pressure systems. At the low and medium speed conditions, MPC exhaust system achieves a higher turbine efficiency than the other two exhaust systems.