Electronically Controlled Sway Bar Link for Adaptive Stiffness

The patent applies the dynamics principle by replacing fixed end links with electronically controlled damper links that can dynamically adjust their damping characteristics. The solenoid-powered active valves enable real-time modification of fluid flow resistance, allowing the sway bar stiffness to adapt to varying driving conditions such as high-speed cornering or rough terrain, thus resolving the contradiction between adaptability and device complexity.

The patent replaces the purely mechanical fixed end link system with an electronically controlled system that uses solenoids and active valves to regulate damping. This substitution introduces electronic control mechanisms that enable dynamic adjustment of damping characteristics without requiring complex mechanical adjustment mechanisms, thereby achieving adaptability while managing system complexity.

The patent applies the universality principle by designing the electronically controlled damper links to perform multiple functions: they provide both the structural connection function of traditional end links and the dynamic damping adjustment function. The active valves control fluid flow in multiple directions (compression and rebound), enabling a single component to replace what would otherwise require multiple separate adjustment mechanisms, thus reducing overall system complexity despite the addition of electronic controls.

The system incorporates sensors that automatically detect driving conditions and trigger appropriate damping adjustments without requiring manual intervention. The control system monitors parameters such as vehicle speed, steering angle, and suspension movement, and automatically actuates the solenoids and valves to maintain optimal damping characteristics, thereby simplifying operation despite the increased device complexity.

The patent applies periodic action by using pulse-width modulation (PWM) to control the solenoids rather than continuous power supply. The solenoids are activated in periodic pulses that are sufficient to move the active valves to the desired position, then powered down while maintaining position through spring forces or pressure differential. This periodic actuation significantly reduces average energy consumption while maintaining precise control capability when adjustment is needed.

The system achieves precise stiffness control by varying parameters such as fluid viscosity, valve opening degree, and flow area rather than requiring large mechanical forces. The active valves modulate the damping fluid flow characteristics, and the solenoids control these parameters through small electromagnetic forces. This parameter-based control approach requires minimal energy compared to traditional mechanical adjustment mechanisms that would require continuous mechanical force application.