A Cowl Upper Structure Based on Pedestrian Head-impact Protection

Abstract

The invention discloses a cowl upper structure based on pedestrian head impact protection, and relates to the technical field of automobiles. The device includes a hood, a water flow tank and a front windshield assembly. The window panel assembly includes a mounting plate set on the top of the wind collecting plate of the front wall and a lower decorative plate set on the top of the mounting plate, the vertical distance between the outer panel of the hood and the wind collecting plate of the front wall is not less than 140mm, The vertical projection width is not less than 60mm, and the span distance along the horizontal plane between the end of the lower decorative panel away from the gutter and the end of the hood outer panel close to the gutter is not more than 80mm. The cowl upper structure based on pedestrian head impact protection provided by the present invention, on the basis of meeting the basic performance requirements of the gutter, the lower decorative panel and the mounting plate, provides a front panel that can fully absorb the collision impact energy and improve the pedestrian protection performance. surround the superstructure.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a cowl upper structure based on pedestrian head-collision protection. Background technique [0002] With the rapid development of the automobile industry, the penetration rate of automobiles is getting higher and higher, and the increasingly complex traffic conditions lead to frequent collision accidents. The number of deaths per 10,000 vehicles in my country has reached 6.2, which is 4 to 10 times that of Japan and other developed countries in the world. In recent years, with the continuous improvement of automobile manufacturing technology, the safety measures of automobiles have been improved day by day, thus greatly improving the safety of driving and the protection of occupants. However, in road traffic accidents, pedestrians are often the biggest victim group. According to surveys, the head accounts for 31.4% of the body parts injured by pedestrians in traffic accident...

AI Technical Summary

Problems solved by technology

Although the impact force on pedestrians can be weakened to a certain extent by increasing the structure, it does not solve the problem from the source, and the degree of weakening is limited, and the added structure often occupies a certain space, which will inevitably sacrifice the space or space of other parts of the car. performance

[0004] The head-on injuries of pedestrians mainly come from the hood and front windshield. When the hood is crushed and deformed by the impact, it will be hindered by the decorative panel under the windshield and the water tank, resulting in greater damage to pedestrians. cause death

At present, there are usually two types of water tank structures on the upper part of the front wall of commonly used models. One is a U-shaped water tank that is directly welded on the outer panel of the lower cross member of the front windshield. In the case of high height, in order to improve its own stiffness mode and NVH performance, a reinforcing plate will be welded under it. Due to the high stiffness and difficulty in deformation, the pedestrian head-collision damage value is generally high; the other is affected by the shape of the vehicle , the outer panel of the lower beam of the windshield is very forward, and the U-shaped water channel is far behind, which cannot provide a mounting point for the lower decorative panel of the front windshield. At this time, a piece of sheet metal needs to be welded on the U-shaped water channel, and at the same time, to improve its rigidity For NVH performance, a reinforcement plate will be welded under it, which will also lead to a higher pedestrian head-collision injury value

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