Power Unit Mounting Layout for Protecting Side Energization Ports
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Solution Overview
Problem
Existing power unit mounting structures face challenges in protecting energization portions from collision damage, leading to increased weight and dead space due to the need for additional protective structures, especially when the energization portion is disposed in the vehicle front-rear direction.
Innovation Solution
The power unit is mounted such that the energization portion is on one side surface in the vehicle width direction, closer to the vehicle cabin partition wall, and collision loads are dispersed through a protruding portion to the vehicle cabin partition wall, reducing the need for additional protective structures and minimizing weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the energization portion is disposed in the vehicle front-rear direction, then it is easier to connect electrical components, but the energization portion becomes susceptible to collision load during front or rear collision
Solution Approach 1:
The energization portion is repositioned from the vehicle front-rear direction to the vehicle width direction, specifically on the left or right side surface of the power unit. This dimensional change moves the energization portion away from the collision path during front or rear impact, reducing susceptibility to damage while maintaining electrical connection functionality
2Reliability
If a protrusion is provided in the vicinity of the energization portion for protection, then the energization portion is protected from collision, but the size and weight of the power unit increase
Solution Approach 1:
The need for additional protective protrusions near the energization portion is eliminated by repositioning the energization portion itself to a location (vehicle width direction) that is naturally protected from front and rear collision loads. The energization portion is extracted from the vulnerable front-rear axis and placed on the side surface, removing the requirement for extra protective structures
3Reliability
If additional protective structures are added to protect the energization portion, then collision damage is reduced, but the dead space in the power unit room increases
Solution Approach 1:
By relocating the energization portion to the vehicle width direction (side surface), the design eliminates the need for protective structures extending in the vehicle front-rear direction. This dimensional repositioning allows the power unit to utilize space more efficiently in the power unit room without creating dead space for collision protection
Data Source
AI summary
The power unit mounting structure includes: a power unit mounted in a power unit room and disposed opposite to a dash panel separating a power unit room and a vehicle cabin in a vehicle front-rear direction; and an energization portion provided on one side surface of the power unit in the vehicle width direction, wherein the power unit is provided such that the other part in the vehicle width direction is closer to the dash panel than the one part in the vehicle width direction on the side surface facing the dash panel.