Abstract: With the strategy of expanding overseas exports advances, the demand for differentiated performance development for different markets has become increasingly urgent. During the market entry into Europe, the fuel economy of a hybrid sports utility vehicle (SUV) model deteriorated significantly due to considerable differences between local traffic conditions and those in China and the lack of targeted strategy adjustments, resulting in weakened product competitiveness. Based on the driving characteristics of European users, this paper conducts an in-depth analysis from the perspectives of vehicle architecture, engine characteristics and control strategies under typical driving conditions, including a constant high speed of 130 km/h, a high-speed cycle collected in Turkey, and the worldwide harmonized light vehicles test cycle (WLTC). The results show that under high-speed conditions, taking reducing the frequency of secondary energy conversion as the core strategy can effectively lower fuel consumption while maintaining battery state of charge, with fuel consumption improved by 0.14 L/100 km at a constant high speed and 0.2 L/100 km under the Turkey-collected high-speed cycle. For the WLTC cycle, a refined simulation benchmarking optimization method is proposed, which achieves a further fuel consumption reduction of approximately 0.1 L/100 km by re-optimizing the existing start-stop strategy. The core strategies and optimization methods presented in this paper can provide an important reference for the performance development of the company’s overseas models.

Key words: energy secondary conversion; refined simulation; start-stop strategy; fuel economy

摘要： 随着海外出口拓展战略的推进，针对不同市场开展差异化性能开发的需求日益迫切。 在进军欧洲市场过程中，由于当地交通环境与国内存在显著差异且缺乏针对性策略调整，某 款运动型多用途汽车（SUV）混动车型的燃油经济性出现明显恶化，导致产品竞争力下降。 文章结合欧洲用户的用车特点，选取高速等速 130 km/h、土耳其采集高速工况及全球统一轻 型车辆测试循环（WLTC）等典型工况，从整车架构、发动机特性与控制策略等维度展开深入 分析。研究表明，在高速工况下，以减少能量二次转换频率为核心策略，在保障电池电量保 持的基础上可有效降低油耗其中高速等速优化 0.14 L/100 km，土耳其采集高速工况优化 0.2 L/100 km；在 WLTC 工况中，提出一种精细化仿真对标优化方法，通过对现有启停策略进 行再优化，可实现油耗的二次优化大约 0.1 L/100 km。文章提出的策略核心与优化方法可为公 司的海外车型性能开发提供重要参考。

关键词: 能量二次转换；仿真精细化；启停策略；燃油经济性