由於複合動力系統能提供較佳的燃油經濟性、最佳化的動力和較低的污染物排放量，目前正穩步實現在商用車輛市場上，而與商用車輛相比，重型履帶車輛有著截然不同的使用需求，雖然燃油經濟性方面的需求仍然存在，履帶車輛中更需要能藉由複合動力系統提供快速且充足的動力以滿足機動性的需求，從而提升其移動性的能力。
重型履帶車輛必須有能力在任何極端環境條件下運作，能夠承受在崎嶇地形時越野行駛所經歷的振動與衝擊，並且必須能在很少或不需要維護的情況下長時間運行，為了提升重型履帶車輛的操作性能，必須將新興技術整合到現有的技術中。目前國外已有將複合動力系統應用於輕型履帶車輛的範例，然而，複合動力技術在重型履帶車輛上的應用仍被認為有許多的不確定性及需要克服的技術挑戰。
因此，本研究將進行油電複合動力系統於重型履帶車輛上應用的可行性分析及概念設計。首先分析各種動力系統的優缺點，選擇所要使用的動力系統，並根據國內複合動力系統相關產業技術發展能量來選擇適當的設備參數，透過各個子系統的數學模型來進行其可行性的評估，最後提出重型履帶車輛油電複合動力系統的概念設計和可行性分析，結果指出油電複合動力系統應用於重型履帶車是可行的發展，在使用1200hp引擎情況下，混合動力系統與純引擎系統相比，在水泥路面最多可改善82.4%油耗、在硬質土壤路面最多可改善22.2%油耗、在沙地路面可改善26.3%油耗，在油耗上有很大的提升。

Hybrid electric propulsion systems have been steadily realized in commercial vehicles due to the improved fuel economy, optimized performance and reduced emissions. Compared to the commercial vehicles, heavy-duty tracked vehicles have completely different needs. Even though the requirement for fuel economy still exists, it is more important to use the more powerful hybrid electric propulsion system to improve the mobility.
Heavy-duty tracked vehicles need to be capable of operating in any extreme environmental conditions, withstanding the vibration and shock in off-road driving, and working in long hours with low maintenance need. In order to improve the performance of the tracked vehicle, emerging techniques such as hybrid electric drive need to be employed in the current technology. Hybrid electric propulsion systems have been successfully implemented in light-duty tracked vehicles in other countries. The implementation of hybrid electric propulsion systems in heavy-duty tracked vehicles, however, still faces a lot of uncertainties and technical difficulties.
Therefore, feasibility analysis and conceptual design of hybrid electric propulsion systems in heavy-duty tracked vehicles is conducted in this work. First of all, literature review of hybrid electric vehicles is conducted to induce the current trends and key techniques in this field. Secondly, mathematical model of hybrid electric tracked vehicles is developed for quantitative evaluation of the benefits and feasibility of various conceptual designs. In the meantime, the existing domestic industrial resources in the hybrid propulsion systems is also be considered in the feasibility analysis. Finally, the model-based analysis and design of hybrid electric propulsion system for heavy-duty tracked vehicle is proposed. The results indicate that the application of the hybrid electric propulsion system in heavy-duty tracked vehicles is a feasible development. In the case of using 1200hp engine, comparing the hybrid electric propulsion system with the pure engine, the hybrid electric propulsion system can improve fuel consumption by up to 82.4% on cement road, up to 22.2% on hard soil road, and up to 26.3% on sandy road. The fuel consumption have been greatly improved.

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