3981594 Volvo Head Lamp | Adaptive Illumination Engineering Platform
3981594 Volvo Head Lamp | Adaptive Illumination Engineering Platform
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3981594 Volvo Head Lamp
Engineered for Volvo's heavy-duty truck series, the 3981594 Volvo Head Lamp (3981594, 3981593, 8144286, 1525773) combines ECE R112 compliance with adaptive beam patterns. The dual-chamber polycarbonate housing features UV-resistant coating that maintains 92% light transmission after 5,000 hours of exposure. Precision-molded reflector surfaces optimize low-beam cutoff lines while maintaining RHD/LHD specific light distribution. Integrated thermal vents prevent condensation buildup, and the stainless steel adjustment gears maintain alignment integrity across 500,000 km service intervals. The plug-and-play connector system matches original harness configurations, ensuring seamless integration with Volvo's CAN-based lighting systems.
Generation-Spanning Compatibility
Designed for Volvo FH/FM series trucks (1993-2021 EU models), this lighting solution accommodates both early mechanical and later electronic adjustment systems. The 3981594 (right) and 3981593 (left) variants maintain original mounting point spacing within ±0.3mm tolerance. Three-stage silicone sealing prevents moisture ingress in extreme climates, while the aluminum-coated reflector surface ensures 95% reflectivity throughout the product lifecycle. Compatible with Volvo's VHD (Vehicle Headlamp Diagnostics) systems, the design incorporates failsafe circuitry to prevent voltage spikes. The universal H4 bulb interface supports both standard and LED retrofit applications without requiring harness modifications.
Optical Engineering
| Component | Specification |
|---|---|
| Lens Material | Hard-coated polycarbonate (3.2mm) |
| Reflector | Vacuum-aluminized PMMA |
The hybrid optical system combines parabolic and free-form reflector elements to achieve 55W efficiency with 150W equivalent output. Computer-optimized prism structures eliminate hot spots in the beam pattern, while the anti-glare step lens design meets ECE R113 visibility requirements. All electrical contacts feature gold-plated terminals rated for 10,000 mating cycles, and the thermoplastic housing withstands 180°C engine bay temperatures. The precision focus mechanism maintains beam accuracy despite vibration levels up to 15G, and the integrated drainage channels prevent water pooling in horizontal mounting positions.
Key Advantages
- ▶ Dual-material thermal expansion compensation
- ▶ Vibration-damped mounting system
- ▶ Tool-free bulb replacement design
Certifications
- ▶ ECE R112-01 homologation
- ▶ IP67 waterproof rating
- ▶ RoHS 2011/65/EU compliant
Compatible with Volvo trucks using OE specifications 3981594, 3981593, 8144286, or 1525773
3981594 Volvo Head Lamp | Adaptive Illumination Engineering Platform
