Bogie-Underframe Connections TRIZ Cases
- Rail Running-Gear Height Control Using Platform Boarding Sensors
Optical boarding sensors detect rail vehicle height at the platform edge, enabling running-gear calibration without costly manual measurements.
- Progressive Roll Stabilizer for Rail Vehicle Wheel Unloading Control
Variable spring stiffness keeps the stabilizer soft in normal running and stiffer at high roll, balancing comfort, clearance, and derailment safety.