​Intelligent EV Brake Performance Test System Delivers Lab Precision for VCU Validation

Beyond Range Anxiety: The Growing Demand for Brake Safety Validation

As consumer expectations for EV range and ride comfort rise, the underlying software and hardware of the Vehicle Control Unit (VCU) have become increasingly complex. However, range is only part of the equation. Rear-end collisions from insufficient braking distance, loss of steering due to wheel lock, and vehicle instability from tire slip remain major safety incidents—all directly linked to pneumatic brake performance. While the VCU acts as the command center for drive control and energy recovery, its brake performance validation has been constrained by simple test functions and a lack of automated, high-precision solutions.

To close this gap, the Tenglong Automotive engineering team has developed a comprehensive brake performance test system specifically designed for intelligent EV VCUs.

Engineering Excellence: Pneumatic Integration and Automated Measurement

This project redefines VCU brake testing by combining real-time simulation with physical pneumatic brake rigs. Key technical features include:

Closed-Loop Distance Measurement: A ranging sensor feeds into an A/D converter and data comparator. The comparator returns signals through a feedback module to the central processor, enabling automatic braking distance measurement without manual intervention.

Visualized Results: The central processor drives both the data comparator for adaptive control and a display for real-time readouts, while a keypad allows test engineers to interact directly with the system.

Pneumatic + Dynamics Integration: By connecting a real-time simulation system to a pneumatic brake test bench and adopting a pneumatic circuit design, the platform captures both pressure characteristics and dynamic braking behavior of the vehicle’s air brake system.

Three Core Innovations for Smarter Validation

Automatic Braking Distance Measurement – Eliminates manual measurement, reduces tester workload, and delivers significantly more accurate and repeatable results.

Pressure & Braking Characteristics Test – Based on pneumatic technology, mechanical design theory, vehicle dynamics, and control engineering, the system ensures high-fidelity testing of the entire brake response chain, directly supporting VCU brake performance improvement.

Cost-Effective & Scalable – The platform is economical to deploy, highly expandable, and flexible, making it suitable for R&D labs, production lines, and aftermarket validation.

Proven Results and Intellectual Property

The project is backed by a national utility model patent: "A Braking Test Platform for Electric Vehicles". The patented design includes an outer frame, dual buffer devices, a bottom plate, a ball-bearing sliding top plate, and an interchangeable test surface that extends through the frame. A vertical plate on the left side anchors the structure.

The final evaluation committee confirmed that the system automates brake performance measurement, enhances testing accuracy, and provides a solid foundation for advancing VCU braking control algorithms.

Commitment to Safety-Driven Innovation

This project reinforces Xiangyang Tenglong Automotive's commitment to safety through smarter testing. By integrating this intelligent brake performance test system into our vehicle production and inspection processes, we ensure that every new energy bus, logistics vehicle, and specialty vehicle delivers reliable, predictable braking performance under real-world conditions.

RD09 Project Proposal for an Intelligent Electric Vehicle VCU Brake Performance Comprehensive Test System