Overloading Transport Innovation: Multi-axle Oil-Gas Suspension Solves Road Condition Challenges

Recently, Shandong Wantong Hydraulic Co., Ltd. (hereinafter referred to as "Wantong Hydraulic") announced that its oil-gas suspension system—specifically developed for multi-axle trucks—has achieved large-scale mass production. Designed to meet the demands of multi-axle vehicles for "heavy loads, challenging road conditions, and stringent stability requirements," the system features a协同油气 damping design, making it a key adaptive component in the fields of heavy-load logistics and mining transportation.

According to the head of Wantong Hydraulic Research & Development Center, the multi-axle vehicle's oil-gas suspension system consists of oil-gas springs, shock absorbers, and a control unit. The oil-gas springs utilize a hybrid medium of nitrogen gas and hydraulic oil, offering a load-carrying capacity that spans from medium to heavy-duty applications. They can automatically adjust their stiffness based on the load, effectively minimizing the impact of road irregularities on the vehicle. Meanwhile, the shock absorbers feature a dual-tube design with adjustable damping, making them well-suited for challenging terrains such as gravel roads and mountain paths—significantly reducing vehicle bounce and jolts. The control unit enables synchronized adjustment of all axles' suspensions, ensuring even weight distribution across each axle under heavy loads and substantially lowering tire wear rates. This system is compatible with various types of multi-axle vehicles, and its suspension travel and load capacity can be customized according to specific vehicle models, perfectly meeting diverse heavy-load transportation requirements.

Enterprise Strength: System R&D and Testing Capabilities

As a national-level "Little Giant" enterprise specializing in niche, specialized, and innovative products, Wantong Hydraulics boasts a dedicated R&D team focused on multi-axle oil-gas suspension systems. The company possesses end-to-end R&D capabilities, ranging from oil-gas spring design to control system programming, and has already secured multiple related patents. To further enhance its expertise, Wantong has established a specialized testing platform for oil-gas suspension systems, capable of simulating challenging road conditions such as gravel roads and steep slopes. This platform enables long-distance road tests and rigorous environmental simulations—from extreme cold to high-temperature environments—ensuring the system’s reliable performance under all circumstances. Leveraging its "Intelligent Suspension System Production Line," Wantong can now meet the annual production capacity requirements of multi-axle transport vehicles equipped with oil-gas suspension systems, easily fulfilling bulk procurement needs from heavy-duty transportation companies while maintaining remarkably short delivery cycles.

Market Application: Overload Transportation Delivers Significant Results

At a coal transportation company in Shanxi, multiple multi-axle heavy-duty trucks equipped with Wantong hydraulic oil-air suspension systems have been in operation for several months, accumulating over tens of thousands of kilometers in coal transport. Not only has the average vehicle speed improved, but the tire replacement cycle has also been significantly extended, while the cargo damage rate has dropped to an exceptionally low level. "These multi-axle trucks are heavily loaded and traversing mountain roads within the mining area," said the company's fleet manager. "Thanks to the exceptional stability and load-bearing capacity provided by Wantong's oil-air suspension system, our transportation efficiency and safety have been dramatically enhanced." Additionally, the product is also being used by a major oversized cargo transportation enterprise in Jiangsu Province, specifically for transporting wind power equipment—perfectly suited to meet the demanding need for smooth handling of ultra-long and ultra-heavy loads.

The Marketing Director of Wantong Hydraulics stated that as heavy-duty transportation evolves toward "efficiency and safety," the demand for air suspension systems in multi-axle trucks will continue to grow. Moving forward, the company plans to develop intelligent, adjustable air suspension systems that leverage IoT technology to dynamically optimize suspension parameters in real time, ensuring optimal performance across various road conditions.