Abstract: | For automotive ecosystem collaborative design, in this paper life cycle assessment (LCA) is combined with the automobile product development, and the two collaborative paths, i. e. the serial and the parallel developments are proposed. The paper studies the lightweight development of the 12 m pure electric bus underframe and the impact of which on China''s resources, energy and environment is analyzed under the serial development scheme. The results show that compared with the original bus underframe, the weight of the optimized one is reduced by 52.5 kg, and the stiffness, strength and inherent dynamic characteristics meet the requirements after the lightweight design. In the whole life cycle, the consumption of mineral resources,fossil energy and the comprehensive environmental impact value decreased by 0.4×10-4 kg Sb eq, 0.7×104 MJ and 0.42×10-11, respectively, corresponding to the reduction ratio of 3.81%, 4.46% and 4.56%. The future |