Straddle Vehicle Battery Tilt Layout for Foot Space and Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing straddle-type vehicles with large batteries experience cramped foot space due to narrowed tread surfaces, reduced front wheel load, and increased shimmy phenomena when carrying cargo.
Innovation Solution
The battery is tilted forward such that its lower end is positioned closer to the floor board, securing a wide tread surface and increasing the load shared by the front wheel, while maintaining a stable center of gravity and reducing vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large-sized battery is mounted on the straddle-type vehicle, then the battery capacity is increased, but the tread surface on the floor board is narrowed making the driver's feet cramped
Solution Approach 1:
The battery is tilted forward at an angle of 10 to 20 degrees relative to the vertical direction, changing its spatial orientation from a standard vertical installation. This angular adjustment repositions the battery's projection on the horizontal plane, allowing the lower end of the front surface to be located behind the upper end, thereby creating sufficient clearance for the floor board tread surface while maintaining large battery capacity
2Quantity of substance
If a large battery is installed below the seat, then the battery capacity is increased, but the load shared by the front wheel is reduced causing small vibrations (shimmy phenomenon)
Solution Approach 1:
The battery is positioned with its center of gravity located toward the front side of the vehicle through forward tilting. This creates a non-uniform weight distribution where the front portion of the vehicle bears more load, specifically increasing the load on the front wheel. This localized weight adjustment counteracts the shimmy phenomenon and improves handling stability while maintaining the large battery capacity
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A straddle-type vehicle (1) of an electric type that travels using electric power. The straddle-type vehicle (1) includes a seat (35) provided behind a handle (26) and on which buttocks of a driver are to be placed, a floor board (31) installed below and in front of the seat (35), and a battery (61) of a fixed type installed below the seat (35). The battery (35) is tilted forward such that a lower end of a front surface of the battery (35) is brought close to the floor board (31). The lower end of the front surface of the battery (61) is located behind an upper end of the front surface of the battery (61).