Active Hall ABS wheel speed sensors are the core sensing components for vehicle braking stability and intelligent parking systems. Compared with traditional magnetic-electric sensors, they support 0 km/h zero-speed detection, high-precision pulse output and dedicated vehicle protocol communication, and have become the mainstream standard for modern passenger cars and new energy vehicles.
The mainstream active Hall sensors form a clear technical evolution sequence: Standard Ordinary Type → First-gen BWM Parking Protocol → Second-gen AK Parking Protocol → High-end KY Intelligent Driving Protocol. All series share the same mechanical structure, magnetic circuit and installation dimensions. The iteration focuses on ASIC algorithm and communication protocol, covering functions from basic braking to advanced intelligent driving.
The standard ordinary type only supports basic ABS, ESP and TCS systems with conventional speed and direction signals, widely used in commercial vehicles and old model after-market replacement. The upgraded BWM first-generation parking sensor adds low-speed subdivision pulses to realize semi-automatic parking data coordination, which is the initial upgrade for intelligent parking applications.
The standardized AK second-generation protocol sensor adopts 3-level current coding and independent ID synchronous transmission, reducing signal delay significantly. It supports multi-sensor fusion, full-automatic parking and memory parking, meeting ASIL-B functional safety standards, and is the mainstream solution for new energy and latest fuel vehicles. The newly upgraded KY high-end protocol is optimized based on AK architecture, expanding data transmission dimension, improving real-time performance and anti-interference ability, adapting to brake-by-wire chassis and high-level intelligent driving for new-generation electric vehicles.
With high universality and wide vehicle coverage, our full-series ABS Hall sensors provide complete, cost-effective solutions for overseas OE manufacturing and aftermarket replacement business.