Self-steering axles are designed to significantly enhance the maneuverability and stability of semi-trailers, especially during sharp turns. Here’s how they handle sharp turns effectively:
1. Automatic Alignment and Steering
Self-steering axles automatically adjust the wheel angles in response to the trailer’s movement. During sharp turns, the axles pivot independently to align the wheels with the direction of the turn. This reduces the turning radius and minimizes tire scuffing, which is particularly beneficial in tight urban environments.
2. Enhanced Stability and Safety
These axles improve stability by distributing the load evenly across all axles. This reduces the risk of rollovers and enhances overall vehicle control during sharp turns. Additionally, self-steering axles actively counteract the tendency of trailers to jackknife by aligning the trailer with the tractor unit.
3. Reduced Tire Wear and Fuel Consumption
By minimizing the scrub radius during turns, self-steering axles reduce tire wear significantly. This not only lowers maintenance costs but also improves fuel efficiency due to smoother tire contact with the road surface.
4. Load-Dependent Steering
Some self-steering axles, like the BPW LL system, are designed with load-dependent steering stabilization. This means the axle adjusts its steering angle based on the load being carried, ensuring optimal performance and stability during turns.
5. Advanced Control Systems
Modern self-steering axles often incorporate advanced control systems, such as electro-hydraulic stabilizers, which further enhance maneuverability and stability during sharp turns. For example, BPW’s Active Reverse Control system provides improved steering capabilities when reversing, making it easier to navigate tight spaces.
6. Simulation and Testing
Research has shown that self-steering axles significantly improve maneuverability at low speeds and lateral stability at high speeds. Simulations and real-world tests demonstrate that these axles can handle both gentle and sharp curves effectively.
Conclusion
Self-steering axles provide a significant advantage for semi-trailers navigating sharp turns by enhancing maneuverability, reducing tire wear, and improving overall stability. These benefits make them an ideal solution for both urban and long-haul operations.
