A car engine hood with a special microcellular filling layer

Abstract

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

Description

technical field [0001] The invention belongs to the field of automobile parts, and in particular relates to a novel automobile engine cover with a special microcell filling layer. Background technique [0002] With the continuous increase of car ownership, the frequency of car accidents is gradually increasing, and the active and passive safety of cars is becoming more and more important. According to accident statistics, children under the age of 15 are one of the high-incidence groups of pedestrian accidents. Their number accounts for only 18% of the total population, but accounts for about 1 / 3 of the number of pedestrian accident injuries. The head is one of the most vulnerable parts of the injury. One, is also the leading cause of death. Accidents are usually children crossing the road and colliding with cars. Because there are many hard points under the hood (such as shock towers, engines, and the lower frame of the front windshield, etc.), due to inertia, the head of ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a new type of automobile engine cover with a special microcell filling layer to solve the problem that the structure of the existing engine cover with energy-absorbing function is complex and cannot accurately absorb the energy of head impact when a car collides with a pedestrian , and the technical problem of the high initial peak value of the collision

Images