Research On Optimized Manipulation Method Based On The Model Of DF7G Diesel Locomotive

In this paper, the models of diesel engine and transmission system of DF7G diesel locomotive are built. Based on that, the influences of different operation methods on distance, time and fuel consumption are discussed, and then the optimized manipulation methods for each operation stage of diesel locomotive are proposed. In order to verify the optimized manipulation method, an evaluation system is also built in this paper to compute and simulate the operation process of the locomotive.Firstly, for the analysis of the fuel consumption, the models of diesel engine and electrical transmission system are built by using GT-power software and system identification respectively, and the relationships between the rotating speed of engine and the fuel consuming rate is obtained. In order to analyze the operation distance and time, the mathematic models of force, operation distance and time in hauling, coasting and braking condition are built.Secondly, the distance, time and fuel consuming performance of DF7G locomotive under different operation conditions, including hauling, coasting, and braking, are analyzed in this paper, and the optimized operation methods for different operating conditions are proposed in this paper.Finally, an evaluation system of diesel locomotive manipulation optimization is built by using Power-Builder software. On the one hand, this system compares and evaluates the single manipulation methods including hauling, coasting or braking; On the other hand, it analyzes the combination of different manipulation method.