Compartment Cross Member Layout to Suppress Charger Unit Vibration
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Solution Overview
Problem
In vehicles equipped with a compartment cross member, charger, and power control unit, large vibrations occur due to low rigidity at the portions between these components, leading to increased vibration amplitudes.
Innovation Solution
The vehicle design includes a compartment cross member with attachment members and linking members that enhance the rigidity between the charger and power control unit, ensuring higher rigidity at specific portions to reduce vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the charger and power control unit are fixed to the compartment cross member with spacing between them, then the equipment unit can be compactly arranged, but the rigidity at the portion between the equipment becomes low causing large vibrations
Solution Approach 1:
A support member is introduced as an intermediary component between the charger and power control unit. This support member extends in the vehicle width direction and provides additional structural support, increasing the rigidity of the equipment unit at the portion between the equipment while maintaining the spacing arrangement.
Solution Approach 2:
The support member extends in the vehicle width direction (lateral dimension), providing structural reinforcement perpendicular to the arrangement direction of the equipment. This dimensional approach increases rigidity without requiring the equipment to be positioned closer together in the primary arrangement direction.
2Reliability
If both ends of the compartment cross member are fixed to the vehicle body, then the equipment unit is securely mounted, but the portions with low rigidity between the equipment vibrate more readily
Solution Approach 1:
The support member acts as a mediator that distributes and reinforces the structural connection between the equipment. By providing additional support in the vehicle width direction, it reduces the vibration amplitude at the low-rigidity portions while maintaining the secure mounting at both ends.
Solution Approach 2:
The support member provides localized structural reinforcement specifically at the portion between the charger and power control unit. This local quality enhancement increases rigidity where needed without changing the overall mounting configuration at the ends of the compartment cross member.
Data Source
AI summary
A vehicle includes a vehicle body in which a mounting chamber is provided, and an equipment unit disposed within the mounting chamber. The equipment unit includes a compartment cross member extending in one direction, the compartment cross member of which a first end portion and a second end portion situated on respective ends in the first direction being fixed to the vehicle body, and a first equipment and a second equipment fixed to the compartment cross member and disposed with a spacing between each other. A rigidity of the equipment unit at a portion situated between the first equipment and the second equipment is higher than a rigidity of the equipment unit at a portion where the first end portion is situated.