Fuel Cell Mounting Structure for Vehicle Vibration Stability
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Solution Overview
Problem
The existing in-vehicle fuel cell systems face challenges in maintaining vibration damping performance and steering stability due to increased weight and amplitude of swing when mounted on vehicles, as they require larger brackets that alter the vehicle's height and center of gravity.
Innovation Solution
The in-vehicle fuel cell system is designed with a stacked configuration where a first fuel cell is fixed to the upper surface and a second fuel cell to the lower surface of an auxiliary machine structure, which is positioned at the same height as the vehicle's skeleton, allowing for reduced bracket sizes and improved alignment with the vehicle's center of gravity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the fuel cell system is mounted using a large bracket to accommodate height differences, then the structure can be attached to the vehicle skeleton, but the weight increases and vibration damping performance deteriorates
Solution Approach 1:
The auxiliary machine structure is positioned at substantially the same height as the skeleton member, creating an equipotential mounting arrangement that eliminates the need for height-compensating brackets. This reduces the bracket size and vehicle weight while maintaining stable attachment to the vehicle skeleton.
2Weight of moving object
If the auxiliary machine structure is positioned at the same height as the skeleton member, then bracket size is reduced and weight is minimized, but proper alignment with the vehicle center of gravity must be achieved
Solution Approach 1:
By aligning the auxiliary machine structure with the skeleton member at the same height, the mounting system achieves a simplified configuration that naturally accommodates the vehicle's center of gravity, reducing both weight and alignment complexity.
3Stability of the object's composition
If the lowermost portion of the fuel cell system is fixed by a large bracket, then the structure is stable, but the amplitude of swing increases during operation
Solution Approach 1:
The auxiliary machine structure is positioned at substantially the same height as the skeleton member, creating a balanced mounting configuration that reduces the amplitude of swing during vehicle operation while maintaining stable attachment.
4Reliability
If the auxiliary machine structure is disposed at the same height as the skeleton member, then vibration damping performance is improved, but the mounting position must be precisely controlled
Solution Approach 1:
The auxiliary machine structure is positioned at substantially the same height as the skeleton member, which simplifies the mounting precision requirements by aligning with the vehicle's natural reference plane, thereby improving vibration damping performance without excessive manufacturing complexity.
Data Source
AI summary
An in-vehicle fuel cell system, including a fuel cell, and an auxiliary machine configured to exchange a gas with the fuel cell, the in-vehicle fuel system including an auxiliary machine structure configured to accommodate the auxiliary machine, wherein the fuel cell includes a first fuel cell fixed to an upper surface of the auxiliary machine structure and a second fuel cell fixed to a lower surface of the auxiliary machine structure, the auxiliary machine structure is disposed at substantially the same position in a height direction as a skeleton member of a vehicle body, and the first fuel cell and the second fuel cell are fixed to the skeleton member via the auxiliary machine structure.