The Development and Evaluation of the Concepts for Hybrid Vehicles
Date Issued
2009
Date
2009
Author(s)
Kuo, Pei-Tsung
Abstract
The purpose of this study is to develop a method for analyzing and synthesizing hybrid systems, and to establish and to evaluate the concepts of all possible hybrid systems composed of 1 engine, 1 electric machine and 1 engine, 2 electric machines. At the beginning of the research, the degrees of freedom of mechanisms are discussed, the rules of power flow in the mechanisms are established, the relationships between torque, speed, and power flow are analyzed, and the method for conceptual analysis can be developed. Then, a systematic approach for conceptual synthesis can be established based on the methods and rules of conceptual analysis, which can be used to generate all possible concepts of the systems, and to build the atlas of structural graphs and power flow graphs. Finally, all possible design concepts of the systems are assessed in terms of engine operating limits, power modes, driving modes, and power circulations. The lack of power modes in some concepts can be modified through the application of clutches. To sum up, through the method developed in the research, design concepts of hybrid systems can be analyzed and synthesized efficiently, qualitative evaluation of systems can also be made. All possible design concepts of hybrid systems composed of 1 engine 1 electric machine and 1 engine 2 electric machines are also summarized in the research.
Subjects
hybrid systems
conceptual analysis and synthesis
structural graph
power flow graph
Type
thesis
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