Technical Product Overview
The Steering Wheel Airbag Coil (technically referred to as the SRS Spiral Cable or Clock Spring) is the critical electromechanical interface within the steering column. It facilitates the continuous transmission of power and data between the stationary steering shaft and the rotating wheel, ensuring the functionality of safety systems like the Driver Airbag (DAB).
At Jiaxing Richang Auto Parts, we do not simply assemble components; we engineer the Flexible Flat Cables (FFC) that form the core of these devices. With a monthly production capacity of 2.8 million sets and a fully integrated manufacturing process-from lamination to punching-we serve as a strategic supplier to global automotive giants including BYD, Volvo, and SAIC GM Wuling.
Engineering Advantages & Lab Validation
1. SGMW GP10 Certified Safety
The reliability of an airbag coil is measured in milliseconds. Our in-house laboratory achieved SGMW (SAIC GM Wuling) GP10 certification in July 2016. We utilize Japanese Kikusui Insulation Testers to conduct 100% resistance verification, ensuring the airbag circuit is free from impedance variances that could prevent deployment during a collision.
2. In-House FFC Lamination Technology
We operate 9 dedicated FFC lamination lines and 11 automated punching/printing sets. By controlling the conductor pitch and insulation thickness internally, we eliminate signal interference (crosstalk) between high-current tracks (Horn/Heating) and sensitive data lines (CAN-bus/ADAS).
3. Extreme Durability Verification
Our coils are validated to outlast the vehicle. We employ 4 specialized SRC Rotary Durability Testers to simulate millions of steering cycles. Furthermore, our "Three-Comprehensive Vibration Systems" and Thermal Shock Chambers (-40°C to +85°C) ensure the ribbon cable maintains flexibility in all environments.
4. Versatile Structural Designs
We manufacture configurations to suit specific OEM architectures:
- U-Type: Compact, folded designs for passenger vehicles (e.g., Baojun 530, Chery Q22).
- Roller-Type: Guided mechanisms for Commercial Vehicles (e.g., Dongfeng Tianlong, Sany) capable of handling large rotation angles up to ±4.8 turns.
Industry Application Sectors
Our Steering Wheel Airbag Coils are standard fitment across diverse automotive sectors:
New Energy Vehicles (NEV)
Supporting digital cockpits for Neta (Hozon), Aion, and BYD, managing regenerative braking and voice commands.
Commercial Logistics
Ruggedized coils for Volvo, Renault, and Shaanxi Automobile, designed to resist high vibration and dust intrusion.
Light Duty & Vans
Durable fitments for JMC Ford Transit and Foton logistics vehicles.
Technical FAQ
Q1: What distinguishes an OEM airbag coil from a standard aftermarket part?
A1: The distinction is in the validation. OEM-grade coils undergo Composite Salt Spray and Dust Chamber Testing to verify corrosion resistance. Inferior parts often skip these tests, leading to early ribbon cable oxidation and open circuits.
Q2: Can your coils support heated steering wheels?
A2: Yes. We design specific SKUs (such as those for the GAC Trumpchi M8) with reinforced copper tracks. These are engineered to handle the higher amperage required for heating elements without thermal degradation.
Q3: How do you prevent the ribbon cable from snapping?
A3: We use CCD Visual Inspection during the manufacturing process to monitor conductor width and spacing. Additionally, every unit is shipped with a "neutral position" locking pin to ensure technicians install the part centrally, preventing mechanical over-extension.
Q4: What is the maximum channel capacity you manufacture?
A4: We support complex multi-function steering wheels. Our catalog includes high-density hubs with up to 26 channels (e.g., for the Dongfeng D600 platform), enabling full control of Cruise, Media, Phone, and Dashboard menus.
Q5: Is professional installation required for airbag coils?
A5: Yes. The airbag coil is a primary SRS safety component. Incorrect installation (failure to center the device) will result in immediate cable rupture upon the first steering turn. Professional alignment is mandatory.
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