Steering Hub Unit with Dynamic Geometry Switching

The patent applies dynamics by making the steering geometry changeable according to vehicle speed and turning acceleration. The ECU dynamically switches between Ackermann geometry (for smooth low-speed turning) and parallel geometry (for balanced high-speed cornering), resolving the contradiction between smooth turnability and travel resistance by adapting the geometry to operating conditions rather than using a fixed configuration

The patent changes the steering geometry parameters (turning angle distribution between inner and outer wheels) based on vehicle speed and turning acceleration. By adjusting these parameters dynamically, the system optimizes the balance between smooth turnability at low speeds and reduced travel resistance at high speeds, preventing excessively large outer wheel turning angles

The system dynamically switches between parallel geometry (providing balanced cornering force at high speeds) and Ackermann geometry (providing smooth turnability at low speeds). This dynamic adaptation resolves the contradiction by selecting the appropriate geometry based on real-time vehicle speed and turning acceleration conditions

The steering geometry parameters are changed based on vehicle operating conditions. At high speeds, parallel geometry is used to generate adequate cornering force; at low speeds, Ackermann geometry is used to ensure smooth turnability. This parameter adjustment prevents excessively large inner wheel turning angles while maintaining adequate cornering force

Rather than using a complex mechanical system with multiple adjustable components, the patent uses a simple ECU-based control system that dynamically selects between Ackermann and parallel geometries. This electronic control approach achieves smooth cornering through software logic rather than complex mechanical adjustments, resolving the contradiction between device simplicity and cornering performance

The patent replaces complex mechanical steering geometry adjustment mechanisms with an electronic control system (ECU) that calculates and commands the appropriate steering angles. This substitution achieves variable steering geometry (improving smooth cornering) while maintaining relatively simple device architecture through electronic rather than mechanical means