Abstract:Based on the description of the work principle and structural features of the emergent five-extinguishing for niotor-wheel truck,this paper analysed the probable fire causes of the truch,discussed the layout of firedscontrol area, introduced and evaluated the main technical perforance indexes of the emergent fire-extinguishing system and its industrial experiment results in detail. This achievement fills in the gaps in the fields of fire-extinguishment for vehicles.