Front Vehicle-Body Structure for High-Mounted Apron Energy Absorption
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Solution Overview
Problem
In vehicles with apron reinforcements positioned at a high level, such as electromotive vehicles, there is a risk that the apron reinforcement may not properly contribute to energy absorption during collisions due to its elevated position, and adding additional energy-absorption structures can increase vehicle weight.
Innovation Solution
A front vehicle-body structure that includes a load transmission portion connecting the front side frame and apron reinforcement, allowing the apron reinforcement to deform and absorb energy by utilizing the deformation of the front side frame, with deformation promotion portions to facilitate bending and energy absorption without additional weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the apron reinforcement is positioned at a high level in electromotive vehicles, then the battery space is secured below the vehicle floor, but the apron reinforcement may not hit against the collision object and contribute to energy absorption
Solution Approach 1:
A load transmission portion is introduced as an intermediary component between the front side frame and the apron reinforcement. This load transmission portion includes a deformation promotion portion that transmits collision loads to the apron reinforcement, enabling it to contribute to energy absorption even when positioned at a high level for battery accommodation.
2Reliability
If another energy-absorption structure is added to replace the ineffective apron reinforcement, then the energy absorption capability is improved, but the vehicle weight increases improperly
Solution Approach 1:
The existing apron reinforcement, which was previously ineffective for energy absorption due to its high position, is made to serve its energy absorption function through the addition of the load transmission portion. This allows the structure to utilize existing components rather than adding completely new energy absorption structures, thereby avoiding improper weight increase.
3Device complexity
If the apron reinforcement is positioned above the collision object, then the vehicle structure is simplified, but the apron reinforcement cannot contribute to energy absorption
Solution Approach 1:
The load transmission portion is designed with localized deformation promotion portions at specific positions where it connects to the front side frame and apron reinforcement. This creates localized deformation zones that enable the apron reinforcement to contribute to energy absorption while maintaining the overall simplified vehicle structure and high positioning of the apron reinforcement.
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 apron reinforcement effectively contributes to energy absorption during collisions by deforming inwardly and downwardly, reducing the need for additional structures and maintaining vehicle weight.
Implementation Method 1
the front side frame has a deformation promotion portion to bend and deform the front side frame inwardly, in a vehicle width direction, in a case where a collision load is applied to the vehicle from a vehicle front side
Implementation Method 2
the load transmission portion is positioned in front of the suspension housing between the front side frame and the apron reinforcement so as to transmit the collision load to the suspension housing
Implementation Method 3
the apron reinforcement is deformed such that the apron reinforcement moves inwardly, in the vehicle width direction, and downwardly
Data Source
AI summary
A front side frame has a first deformation promotion portion to bend and deform a front side frame inwardly in a case where a collision load is applied to a vehicle from a vehicle front side, a front vehicle-body structure further comprises a load transmission portion positioned in front of a suspension housing between the front side frame and an apron reinforcement so as to transmit the collision load to the suspension housing, the load transmission portion being provided to connect the front side frame and the apron reinforcement so as to transmit a tensional load applied in a vehicle width direction between the front side frame and the apron reinforcement, and the load transmission portion has a second deformation promotion portion positioned in the vicinity of the first deformation promotion portion and promoting the bending/deforming of the front side frame.