关键词: 能量二次转换；仿真精细化；启停策略；燃油经济性

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