混合动力汽车高原制动真空度影响因素研究

Research on Factors Affecting Braking Vacuum of Hybrid Vehicle in High Altitude

对某插电式混合动力汽车制动真空度的影响因素进行了阐述,结合混合动力汽车动力输出工况进行了负压制动助力的策略调整,根据电子真空泵的工作特性制定了高原工作方案,并针对典型工况进行了整车试验研究。结果表明,针对影响因素进行策略调整后,该混合动力汽车高原真空度水平有效改善并能满足高原制动的性能要求。

Factors affecting braking vacuum of plug-in hybrid electric vehicle （PHEV） are elaborated in this paper. The strategies of negative pressure braking boosting are adjusted based on output conditions of hybrid electric vehicle, and operating plan in high altitude is developed according to operating characteristic of electronic vacuum pump, and vehicle experimental research in typical conditions is carried out. The results show that after the strategies are adjusted, the braking vacuum of this PHEV is improved effectively, and can satisfy the braking requirement in high altitude.