Electric Vehicle Dynamic Lean Modes for Turning Stability
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Solution Overview
Problem
Existing electric vehicles, particularly tricycles, suffer from insufficient maneuverability and stability during turning, especially at low and high speeds, due to wide wheelbases that prevent them from being used in narrow bike lanes and limit their urban transportation capabilities.
Innovation Solution
A dynamic drivetrain system with independently articulating rear wheels, enabled by swing arms and a tilt control mechanism, allows the vehicle to lean into turns while maintaining wheel contact with the ground, enhancing stability and maneuverability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a wide wheelbase is used to maintain stability and handle heavy loads, then the vehicle can carry heavier cargo and maintain stability, but the vehicle cannot fit into narrow bike lanes and has reduced maneuverability
Solution Approach 1:
The patent implements a dynamic wheelbase system where the distance between rear wheels can be adjusted. At low speeds, the wheelbase is extended for stability and heavy load handling. At high speeds, the wheelbase is retracted to enable the vehicle to fit into narrow bike lanes and improve maneuverability. This dynamic adjustment resolves the contradiction between stability and compactness.
Solution Approach 2:
The patent changes the physical parameter of wheelbase width based on operating conditions. The wheelbase width is variable rather than fixed, allowing the vehicle to optimize between stability (wide wheelbase) and maneuverability (narrow wheelbase) depending on speed and loading conditions.
2Stability of the object's composition
If a wide wheelbase is used to improve stability during turning, then the vehicle maintains better stability, but the maneuverability and handling at low and high speeds deteriorates
Solution Approach 1:
The patent employs dynamic adjustment of the wheelbase width based on vehicle speed and turning conditions. During high-speed turns, the wheelbase is extended to improve stability. During low-speed maneuvering or when navigating narrow spaces, the wheelbase is retracted to enhance ease of operation and maneuverability.
Solution Approach 2:
The wheelbase width parameter is made variable and is changed according to operational requirements. The system automatically adjusts the wheelbase width to optimize the balance between turning stability and maneuverability based on real-time conditions.
3Adaptability or versatility
If the wheelbase is reduced to fit into bike lanes, then the vehicle can be used in urban transportation, but the stability and load-handling capability deteriorates
Solution Approach 1:
The patent implements a dynamically adjustable wheelbase that can be retracted to a narrow configuration for urban transportation in bike lanes, and extended to a wide configuration for stable cargo handling. This dynamic capability enables the vehicle to adapt to different operational modes, resolving the contradiction between urban adaptability and stability.
Data Source
AI summary
An electric vehicle (e.g., a tricycle, or a car) includes a frame portion having a first side and a second side. A first rear wheel is disposed rearward relative to the frame portion at the first side. A second rear wheel is disposed rearward relative to the frame portion at the second side, the second rear wheel being spaced from the first rear wheel with a wheel base width therebetween (e.g., in a range from 260 mm to 900 mm). A first swing arm is pivotably coupled to the frame portion at the first side and operably coupled to the first rear wheel and extending between the frame portion and the first rear wheel. A second swing arm pivotably coupled to the frame portion at the second side and operably coupled to the second rear wheel and extending between the frame portion and the second rear wheel.