Electric Passenger Car Wheel Radius Layout for Lower Axial Friction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing automotive designs, particularly for passenger cars, lack fuel efficiency due to high axial friction losses in wheel systems, necessitating a more efficient wheel design to enhance energy utilization.
Innovation Solution
Implementing electrically driven motors with larger wheel radii, differential wheel speed control, and electronic traction management to optimize torque distribution and reduce friction, combined with a battery pack that can be repositioned within the vehicle frame for optimal weight distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional wheel designs are used in passenger cars, then the vehicle structure is simple and easy to manufacture, but axial friction losses are high resulting in poor fuel efficiency
Solution Approach 1:
The patent applies parameter changes by modifying the wheel radius dimension parameter. Specifically, it uses a first wheel radius for the first wheel and a second wheel radius for the second wheel, where the second radius is at least 7% greater than the first radius. This parameter change optimizes the balance between reducing axial friction losses and maintaining device complexity at acceptable levels.
2Productivity
If differential wheel radii are implemented, then energy efficiency is improved through reduced friction losses, but the wheel system becomes more complex
Solution Approach 1:
The patent implements asymmetry by using different wheel radii for different wheels in the vehicle. The second wheel has a radius at least 7% greater than the first wheel, creating an asymmetric wheel configuration that optimizes energy efficiency by reducing axial friction losses while managing the resulting system complexity.
3Use of energy by moving object
If larger wheel radii are used, then travel distance per unit energy is enhanced, but vehicle stability during acceleration and braking may be affected
Solution Approach 1:
The patent applies local quality by assigning different wheel radii to different wheel positions based on their specific functional requirements. The first wheel radius and second wheel radius are differentiated to optimize both energy efficiency and stability characteristics for their respective locations in the vehicle system.
Data Source
AI summary
An electrical passenger car, the electrical passenger car comprising: a battery pack; motor control electronics; a communication control unit; at least one electrically driven motor; wheels, wherein said wheels are connected to said at least one electrically driven motor; and sensors, wherein said sensors are connected to at least said motor control electronics, wherein said wheels comprise a first wheel and a second wheel, wherein said second wheel has a radius at least 7% greater than a radius of said first wheel, and wherein said battery pack is mounted in said electrical passenger car frame such that said battery pack can be moved upward or downward within said electrical passenger car.