Dongfeng GX Air spring assembly 2918020-H04B3

As a core component of the air suspension system, this assembly delivers exceptional load-bearing capabilities tailored to heavy-duty operations. It is rated to support a maximum static load of 8,500 kg per air spring, with a dynamic load capacity of 6,800 kg under continuous operation—ideal for Dongfeng GX trucks with a gross vehicle weight up to 40 tons. The air spring operates within a pressure range of 0.3 to 0.8 MPa, automatically adjusting internal pressure via the vehicle’s height control valve to maintain a stable ride height (380±5mm) regardless of cargo weight. This pressure-regulated performance minimizes frame stress, reduces road impact transmission to the cab, and ensures uniform tire contact with the road surface, extending tire lifespan by up to 20% compared to traditional leaf-spring systems.

The assembly features a robust, multi-layer construction designed for durability and air retention. The main air bag is crafted from high-strength synthetic rubber (chloroprene rubber blended with natural rubber), reinforced with four layers of high-tensile polyester cord fabric (each with a tensile strength of 1,800 N/tex) to resist bursting and deformation under extreme pressure. The top and bottom metal plates (hot-dip galvanized steel, Q235 grade) are bonded to the rubber via a vulcanization process, creating a permanent, leak-proof seal that withstands 1.2 MPa pressure testing without failure. Additionally, an integrated check valve prevents rapid air loss during minor punctures, providing a 5-minute emergency buffer to safely stop the vehicle. The air-tightness design ensures a pressure retention rate of ≥95% over 24 hours, reducing the frequency of air compressor operation and saving fuel.

Engineered to perform in diverse climatic conditions, the air spring assembly exhibits exceptional resistance to temperature extremes and environmental hazards. The rubber compound remains flexible across a temperature range of -40°C to +80°C, avoiding hardening in cold climates or softening in high heat—critical for vehicles operating in northern China’s winter or southern desert regions. The outer rubber layer is formulated with anti-ozone and UV-resistant additives, preventing cracking from prolonged sunlight exposure (passing 1,000 hours of accelerated weathering testing per ISO 4892). It also resists degradation from road chemicals (salt, de-icing fluids) and petroleum-based contaminants, maintaining structural integrity even after repeated exposure. The assembly’s service life exceeds 800,000 kilometers under standard operating conditions, significantly reducing maintenance intervals.

This air spring assembly meets stringent global standards for commercial vehicle suspension components. It complies with GB/T 13061 (China National Standard for Automotive Air Springs), ISO 10881-1 (International Standard for Air Springs for Commercial Vehicles), and ECE R13 (UN regulation for vehicle suspension safety). Each unit undergoes rigorous factory testing, including: a burst pressure test (withstanding 1.5 times the maximum operating pressure), a fatigue test (1.2 million cycles of compression/extension), a low-temperature flexibility test (-40°C for 72 hours), and a dimensional accuracy inspection using 3D scanning. These certifications ensure compatibility with both domestic and international markets, making it suitable for Dongfeng GX trucks operating across Asia, Europe, and other regions with strict automotive safety regulations.