ABS Combination Valve – Anti-Lock Braking Pressure Control Core for Semi-Trailers

Description

The ABS Combination Valve (Part No. 4005000810) is the core control unit of semi-trailer brake systems, integrating an ​Electronic Control Unit (ECU) and ​multi-channel pressure valves for EBS/ABS 4S/2M compliance with ISO 1215 and SAE J1939. It dynamically adjusts brake chamber pressure (0.2~1.0MPa) based on wheel speed sensor data to prevent lock-up, enhancing stability on slippery roads. Featuring a ​high-strength aluminum alloy body (anodized) and ​gold-plated contacts (≤3mΩ resistance), it achieves ≤0.1s response time and ≤0.05mL/min leakage (@1.0MPa).

Core Functions:

1. ​Dynamic Pressure Control: ±5% pressure accuracy for multi-axle braking.
2. ​Redundancy: Backup circuit activates if primary ECU fails.
3. ​CAN Communication: Synchronizes with tractor EBS for coordinated braking.

Key Importance:

• ​Safety Critical: Ensures anti-lock reliability and vehicle stability.
• ​Material Impact:
  • ​Lightweight: Aluminum reduces weight by 30% with 1000h salt spray resistance.
  • ​Gold Plating: ≥1.2μm coating prevents oxidation-induced signal loss.
  • ​Sealing: FKM O-rings withstand -40℃~150℃ and brake fluid.

Replacement Guidelines:

1. ​Calibration: Use OEM tools for ECU parameter matching.
2. ​Leak Test: 1.5MPa pressure hold (≤0.02MPa drop/5min).
3. ​OEM Parts: Non-genuine valves risk CAN protocol mismatch.