What is KDSS?

[Vieira]

KDSS stands for Kinetic-Dynamic-Suspension-System, which translates to Dynamic Suspension System in Chinese. Its function is to adjust the stabilizer bars and balance bars through hydraulics, enhancing the vehicle's performance both on-road and off-road. The KDSS primarily consists of an electronically controlled dynamic adjustment suspension system. The front and rear stabilizer bars of the KDSS each have independent hydraulic cylinders that control vertical movement and are connected by a hydraulic system. Each stabilizer bar's hydraulic cylinder is divided into upper and lower chambers. The front upper and lower hydraulics are connected to the rear upper and lower hydraulics via their respective hydraulic lines. Each hydraulic line contains an accumulator. The KDSS controls a set of valves connected to the accumulators in the hydraulic lines to maintain each stabilizer bar in its optimal state. KDSS Mode Selection: Normal Mode: When the vehicle is in a turning state, the outer suspensions of both the front and rear wheels are compressed, while the inner suspensions are extended. This causes the stabilizer bars to twist, resisting body roll. The two connected hydraulic pumps have no fluid flow between them, functioning like a conventional suspension but with improved anti-roll capability. Off-Road Mode: When any one of the four wheels encounters an obstacle and is lifted, the suspension of the lifted wheel is compressed, and the stabilizer bar rises along with the hydraulic pump. Fluid flows between the two hydraulic pumps, absorbing the twist of the stabilizer bar. Since the stabilizer bar does not twist, the suspension travel is greater than that of a conventional suspension and can be adjusted according to different road conditions. It can automatically disengage the stabilizer bar's function based on the terrain. How KDSS Works: It uses two hydraulic cylinders to control a fixed point (left-side fixed point) on the front and rear suspension stabilizer bars. Under normal driving conditions, this fixed point is locked, and the stabilizer bars function normally, performing anti-roll duties during turns. In off-road conditions, as the suspension is continuously compressed and extended, this fixed point is released, moving with the hydraulic cylinders. The rotational constraint of the stabilizer bar along the X-axis (vehicle length direction) is also released, allowing rotation around the right-side fixed point. This means the stabilizer bar no longer has any effect, ensuring better wheel contact and allowing significant wheel articulation. This improves tire contact performance and overall off-road capability.