Effects of road slope on emission characteristics for a heavy-duty diesel vehicle based on engine-in-the-loop methodologySu Li, Xiaowei Wang, Tao Gao, Yongzhan Huo, Yang Lu and Mingda WangE3S Web Conf., 358 (2022) 01006DOI: https://doi.org/10.1051/e3sconf/202235801006