Dongfeng GX EBS trailer valve assembly 3522210-91000

As a critical control unit of the Dongfeng GX’s EBS trailer system, the 3522210-91000 assembly is responsible for real-time, accurate regulation of trailer brake force based on signals from the main vehicle’s EBS ECU. It receives CAN bus signals (e.g., brake pedal pressure, vehicle speed, wheel slip status) from the main vehicle, then adjusts the air pressure delivered to the trailer’s brake cylinders with millisecond-level response (≤30ms). This enables key EBS functions: 1) Anti-lock Braking (ABS) for the trailer, preventing wheel lock-up during emergency braking on slippery roads; 2) Brake Force Distribution (BFD), optimizing pressure between the main vehicle and trailer based on load (e.g., increasing trailer brake force when fully loaded); 3) Trailer Stability Control (TSC), correcting trailer sway by modulating individual wheel brake force. Without this valve, the trailer’s braking would lack electronic precision, increasing stopping distances and instability risks

The 3522210-91000 EBS trailer valve assembly features a robust, corrosion-resistant structure built to withstand the harsh conditions of trailer operation—including long-term vibration, temperature extremes, and exposure to road salt, dust, and moisture. The main valve body is constructed from high-grade cast iron (e.g., GG25) or aluminum alloy (ADC12) with a corrosion-resistant coating (e.g., zinc-nickel plating), ensuring resistance to rust and impact from road debris. Internal components such as the pressure control solenoids and valve spools use hardened stainless steel (e.g., 1.4301) to minimize wear from high-pressure air flow (up to 1.0 MPa) and ensure long-term smooth operation. The electrical connector is rated IP6K9K for waterproof and dustproof performance, protecting the CAN bus signal interface from moisture intrusion during heavy rain or washing. Additionally, the assembly’s sealing rings are made of fluororubber (FKM), which maintains elasticity and airtightness across a wide temperature range (-40°C to 120°C)

The 3522210-91000 is engineered with Dongfeng GX-specific technical parameters to ensure optimal trailer braking performance. Its working air pressure range (0.6-1.0 MPa) matches the Dongfeng GX’s EBS system pressure specifications, ensuring stable pressure output even under peak load conditions. The valve’s pressure regulation accuracy is ±2% Full Scale (FS), guaranteeing consistent brake force delivery to the trailer’s brake cylinders. It supports a maximum air flow rate of 300 L/min, which is sufficient to quickly actuate the trailer’s brakes (even for multi-axle trailers). The electrical system operates on the Dongfeng GX’s standard 24V on-board voltage (compatible with heavy-duty trailer electrical architectures) and features overvoltage protection (up to 36V) to prevent damage from electrical surges. The CAN bus communication rate is 250 kbps (compliant with SAE J1939), ensuring fast and reliable signal transmission between the main vehicle and trailer EBS components

The 3522210-91000 EBS trailer valve assembly meets strict global automotive safety standards and undergoes rigorous testing to ensure reliability. It is manufactured in accordance with ISO/TS 16949 (automotive quality management system) and complies with ECE R13-H (United Nations regulation for commercial vehicle braking systems)—a mandatory certification for EBS components in global markets. Each unit undergoes 100% factory testing, including: 1) Air tightness testing (no leakage at 1.2 MPa pressure for 5 minutes); 2) Functional testing (verifying ABS/TSC function and pressure regulation accuracy); 3) Environmental testing (temperature cycling from -40°C to 120°C, vibration testing per ISO 16750-3); 4) Durability testing (simulating 1 million brake cycles to mimic 5 years of use). To support customers, the assembly comes with a manufacturer’s warranty (typically 18 months or 150,000 kilometers) and access to technical support—including EBS system calibration guidance and troubleshooting assistance—making it a trusted choice for Dongfeng GX trailer operators and repair facilities