基于轻量化的铸铝发动机罩生命周期评价

Lightweight-based life cycle assessment of cast aluminum engine hood

为实现汽车轻量化,验证熔模精密铸造产品的节能减排效果,文章对发动机罩进行生命周期评价。结合熔模铸造工艺设计出满足刚度和模态性能要求的发动机罩,建立发动机罩全生命周期评价模型;追踪生命周期能耗和温室气体(greenhouse gases,GHG)排放,并进行敏感性分析。结果表明:通过一体化集成设计使铸铝发动机罩的质量减轻17.87%,全生命周期能耗降低10.18%,GHG排放减少7.12%。该铸铝发动机罩生命周期评价结果满足节能减排要求,研究为汽车绿色低碳化设计提供了理论依据。

In order to achieve automotive lightweight and verify the energy saving and emission reduction effect of investment casting products,this paper conducted a life cycle assessment of the engine hood.Based on the investment casting process,a hood that meets the requirements of stiffness and modal performance was designed,a hood full life cycle assessment model was established to track the life cycle energy consumption and greenhouse gases(GHG)emissions,and the sensitivity analysis was performed.The results show that the integrated design reduces the mass of the cast aluminum hood by 17.87%,the life cycle energy consumption by 10.18%,and the GHG emissions by 7.12%.The life cycle assessment results show that the cast aluminum hood meets the energy saving and emission reduction requirements,providing a theoretical basis for the green and low-carbon design of the vehicle.