一種混合動力系統配置之設計方法及操作策略

Abstract

本研究欲針對混合動力系統發展一方法論，可以用來精簡動力系統構型使其降低元件複雜度並兼具完整性能表現，及設計其操作策略。首先，我們改善操作模式切換圖論，加入無效操作模式點，發展出完整單離合器操作模式圖，以完整操作模式切換圖，釐清動力系統在操作模式切換之間的元件之運作狀態，並利用模擬分析來決定切換系統模式之最佳切換路徑。接著，本研究建立一操作模式對應行車模式之設定，發展換檔策略圖，利用該圖決定系統操作模式運作之行車模式，並配合完整操作模式切換圖，可以同時考量車輛性能表現以及換檔路徑優劣，系統化地篩選動力系統構型及其換檔策略。最後再針對混合動力系統構型之性能表現不足的部分，調整變速箱速比，可以達到改善混合動力系統構型之目的。本研究建立一套完善的車輛混合動力系統構型精簡及篩選其操作策略方法論，也得以運用於改善混合動力系統之性能表現。

The research aims to develop a unified methodology for the conceptual designs and operation strategy of hybrid power systems. Firstly, we improve the “Operation Transformation Graph(OTG)”, add the invalid operation mode point, develop the “Complete Operation Transformation Graph(COTG)” to clarify the situation of each unit when transforming systems’ operation modes, and determine the best switching path by utilizing computer aided engineering(CAE). Then, this study develops a new type of graph, which is named “Shifting Strategy Graph” to correspond the system operating mode to the driving mode and use it to analyze the hybrid system’s performance. Cooperating this two graphs together, we can simultaneously consider the performance of the vehicle and the switching path of systems’ operation modes, and systematically screen the power system configuration and its shift strategy. Finally, for the overall performance of the hybrid system, the gear ratio of the transmission can be adjusted so that the configuration of the hybrid systems can be improved. This study establishes a unified methodology to achieve the goal to identify the better vehicle hybrid system configurations and to determine the proper operational strategy, and can also be applied to improve the overall performance of the hybrid systems.