Conceptual Designs and Evaluation of Integrated Multi-Propulsion Power trains

The purpose of this study is to develop conceptual designs methodology and evaluation of integrated multi-propulsion power trains. By separating one propulsion unit into multi-propulsion units with mechanical coupling, the power can be remixed and distributed in order to increase transmission efficiency in different operation mode. In addition, an innovative multi-propulsion power train is used as an example. This study starts from synthesizing the multi-propulsion system by using functional power graph. A naming system is developed to classify the multi-propulsion power trains systematically. Two component sizing methods depend on the performance of the vehicle are also developed for each two kinds of mechanical coupling. Then, several quantitative indices along with grading system are established to make analysis and assessment of the multi-propulsion power train in order to show its features and check the satisfaction of design objectives. Finally, a multi-mode hybrid power train is used as an example of the design. A program written in Matlab is used to simulate the performance of a car with the power train. Indices can be calculated by the simulation result and sum up the features of the system. In this research, a conceptual design process and evaluation indices are developed. The result could be a considerable consultation for further research in multi-proportion power train.