一种具有特殊微元胞填充层的新型汽车发动机罩,包括发动机罩外板、负泊松比元胞填充层、发动机罩内板；所述负泊松比元胞填充层是由多个微元胞排列组合而成；所述微元胞由四个吸能件组合构成,四个吸能件的顶端、底部均通过一个正方体的连接块连接,使其形成一个整体；所述吸能件包括上水平连接部、第一吸能部、第二吸能部、传力部、第三吸能部、下水平连接部；其中,上水平连接部与第一吸能部连接,第一吸能部与第二吸能部连接,第一吸能部与第二吸能部之间的夹角α为钝角；第二吸能部与传力部连接；传力部与第三吸能部连接,第三吸能部与下水平连接部连接,第三吸能部与下水平连接部之间的夹角β为钝角。该发动机罩结构简单,碰撞时吸能效果好。

A new type of automobile engine hood with a special microcell packing layer, including an outer hood panel, a negative Poisson's ratio cell packing layer, and an engine hood inner panel; the negative Poisson's ratio cell packing layer is composed of a plurality of micro The cells are arranged and combined; the micro-cell is composed of four energy-absorbing parts, and the top and bottom of the four energy-absorbing parts are all connected by a cube connecting block to form a whole; the energy-absorbing part It includes an upper horizontal connection part, a first energy absorption part, a second energy absorption part, a force transmission part, a third energy absorption part, and a lower horizontal connection part; wherein the upper horizontal connection part is connected to the first energy absorption part, and the first energy absorption part The energy part is connected to the second energy absorbing part, the angle α between the first energy absorbing part and the second energy absorbing part is an obtuse angle; the second energy absorbing part is connected to the force transmitting part; the force transmitting part and the third energy absorbing part Connected, the third energy absorbing part is connected with the lower horizontal connecting part, and the included angle β between the third energy absorbing part and the lower horizontal connecting part is an obtuse angle. The engine cover has a simple structure and good energy absorption effect during collision.