Front Compartment Structure With Dual Crash Load Paths
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Solution Overview
Problem
Pure electric vehicles face safety issues due to increased vulnerability in small-angle collisions and lack of natural physical defense in their front compartment structures, as they have narrower longitudinal beam spacings and empty spaces within the compartment, which affect force transmission and collision energy absorption.
Innovation Solution
A vehicle front compartment structure is designed with a front anti-collision beam, a front longitudinal beam, an upper side beam, and an energy-absorbing box, where the energy-absorbing box is connected to both the front anti-collision beam and the longitudinal beam, forming force transmission structures to disperse collision forces and enhance energy absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the longitudinal beams are arranged with narrow spacing to accommodate low profile tires, then the vehicle width is reduced, but the backward force transmission capability is greatly impacted
Solution Approach 1:
The patent introduces a new spatial dimension by adding upper side beams that connect to A-pillars, creating a three-dimensional force transmission network. This allows force to be transmitted not only longitudinally but also vertically and diagonally, compensating for the reduced longitudinal beam spacing and maintaining overall structural strength.
Solution Approach 2:
The force transmission function is segmented into multiple independent paths: longitudinal beams for primary force transmission, upper side beams for secondary transmission, and A-pillars for vertical support. This segmentation ensures that if one path is compromised, other paths can still maintain structural integrity and force transmission capability.
2Device complexity
If the front compartment uses a rear-wheel-drive design with large empty space, then the vehicle layout is simplified, but the natural physical defense capability is lost
Solution Approach 1:
The energy-absorbing box is pre-installed in the front compartment, positioned to engage with collision barriers before impact occurs. This preliminary placement ensures that when a collision happens, the structure is already configured to absorb energy effectively, compensating for the lack of traditional engine-based physical defense.
Solution Approach 2:
The energy-absorbing box acts as an intermediary element between the collision barrier and the vehicle's internal structures. It mediates the impact force, absorbing and dissipating energy before it can reach critical components, thereby providing protective function without requiring traditional heavy mechanical defenses.
3Device complexity
If the energy-absorbing box is directly connected to the longitudinal beam, then the structure is simplified, but the force transmission paths are insufficient
Solution Approach 1:
The force transmission function is divided into multiple segments: the energy-absorbing box connects to both longitudinal beams and upper side beams, creating separate transmission segments. This segmentation ensures that force can be distributed through multiple independent paths, improving reliability without significantly increasing overall structural complexity.
Solution Approach 2:
The energy-absorbing box serves multiple functions simultaneously: it absorbs collision energy, connects to longitudinal beams for force transmission, and links to upper side beams for additional support. This multi-functionality allows a single component to provide enhanced reliability without proportionally increasing structural complexity.
Data Source
AI summary
A vehicle front compartment structure and a vehicle. The vehicle front compartment structure includes a front anti-collision beam, a front longitudinal beam, an upper side beam, and an energy-absorbing box. A side of the energy-absorbing box is connected to the front anti-collision beam. The front longitudinal beam and the upper side beam are separately connected to another side of the energy-absorbing box. A first force transmission structure is formed through the front anti-collision beam, the energy-absorbing box, and the upper side beam. A second force transmission structure is formed through the front anti-collision beam, the energy-absorbing box, and the front longitudinal beam.