摘要
为了实现无级自动变速汽车能够以特定车速稳定下坡行驶,基于所提出的车速维持范围的概念,经车辆下坡工况动力学分析,考虑金属带式无级变速器(Continuously Variable Transmission,CVT)速比变化特性及发动机转速限制,获得了不同坡度下的车速维持范围曲线。仿真分析结果表明,车速能维持时,经过5～15 s就可以达到维持目标值,且超调量小于1 km/h。
In order to maintain a particular velocity of a continuously variable transmission （CVT） vebicle on long downhill path, the maintained velocity range curves for different slopes were obtained based on vehicle dynamics analysis when the speed ratio characteristics of CVT and engine speed limit are considered. Simulation results show that it takes 5 -15s to reach and maintain the target speed if the target is achievable, and the overshoot is less than 1 km/h.
出处
《汽车工程学报》
2013年第4期269-274,共6页
Chinese Journal of Automotive Engineering
基金
国家自然科学基金面上项目(51075410)
