Vehicular Hood Lock Reinforce Deformation for Load Reaction
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Solution Overview
Problem
Existing vehicular hood structures face challenges in managing load reactions when a collision member collides near the intermediate position between the hood general portion and the hood front end edge, leading to increased load input and potential deformation issues.
Innovation Solution
A vehicular hood structure with a hood outer panel, a hood inner panel featuring a skeleton with reinforcement beads, and a hood lock reinforce with a weakened portion that deforms under load, along with a flat portion and legs extending to the hood inner panel, designed to absorb impact energy and reduce deformation loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a collision member collides against the vicinity of an intermediate position between the hood general portion and the hood front end edge, then both the hood inner panel and hood lock reinforce are deformed to absorb impact energy, but the load reaction inputted to the collision member is excessively increased
Solution Approach 1:
The patent applies local quality by providing a flat portion at the hood inner panel adjacent to the hood front side of the skeleton portion, and joining the rear end portion of the hood lock reinforce to the flat portion through legs extending to the hood back side. This creates a localized structural configuration that modifies load distribution characteristics in the intermediate region between the hood general portion and hood front end edge, enabling proper load reaction generation while maintaining energy absorption capabilities
2Strength
If the hood lock reinforce is reinforced to strengthen the hood front end portion, then the structural strength is improved, but the load reaction increases when a collision occurs at the intermediate position
Solution Approach 1:
The patent segments the hood structure into distinct functional zones: the hood general portion with skeleton and reinforcement beads for overall strength, the hood front end portion with hood lock reinforce for localized reinforcement, and the intermediate region with the flat portion and legs configuration. This segmentation allows each zone to perform its specific function while the transition region (flat portion with legs) properly manages load reactions during intermediate position collisions
3Loss of energy
If the hood inner panel is deformed with reasonable load at collision time, then the energy absorption is improved, but the load reaction to the collision member becomes excessive when collision occurs near the intermediate position
Solution Approach 1:
The flat portion at the hood inner panel adjacent to the hood front side of the skeleton portion acts as an intermediary element between the hood general portion and the hood lock reinforce. The legs joining the rear end portion of the hood lock reinforce to the flat portion create a transition structure that mediates load transfer, enabling the hood inner panel to deform with reasonable load while generating proper load reaction to the collision member
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The structure effectively absorbs impact energy and reduces excessive deformation loads, ensuring proper load reaction and improved pedestrian protection by distributing loads efficiently across the hood components.
Implementation Method 1
a weakened portion is provided, the weakened portion deforming at a time of input of a load of a predetermined value or greater from a hood upper side
Implementation Method 2
when a collision member collides against, for example, a vicinity of an intermediate position between the hood general portion and a portion close to a hood front end edge
Implementation Method 3
In order to plastically deform a hood inner panel with a reasonable load at a time of collision, a plural number of wave-like beads are formed at the hood inner panel
Implementation Method 4
a rear end portion of the hood lock reinforce is joined, at legs (leg portions) extending to the hood back side at portions spaced at a predetermined distance in the hood width direction, to the flat portion
Data Source
AI summary
A vehicular hood structure, which can generate more properly a load reaction to be inputted to a collision member, even if the collision member collides against the vicinity of an intermediate position between a hood general portion and a portion close to a hood front end edge so that a load acts to deform a hood inner panel of the hood general portion and a hood lock reinforce of a hood front end portion. A rear end portion of the hood lock reinforce is joined, at a leg extending to the hood back side at a portion spaced at a predetermined distance in the hood width direction, to a flat portion of the hood inner panel. In this hood inner panel, a crush bead is formed along the hood width direction at the substantially central portion of a skeleton portion in the hood length direction, and a small bead is formed at the substantially central portion of the flat portion in the hood width direction.