Match power distribution, control modules, switches and displays to the platform: trucks, buses, excavators, agricultural machinery and new-energy vehicles, with the right IP rating, temperature range and CAN protocol.
For heavy-truck OEM programs, Youlai supplies cab and chassis electronics — power distribution boxes, fuse / relay boxes, body control modules, and the switches, sensors and clusters that go with them. The NBX-957 covers central power distribution; sealed IP67 variants (NBX-971 chassis, NBX-961 excavator-class) are designed for desert and tropical-humid duty cycles.
Heavy-truck cabs — especially tractor-trailer combinations — carry the worst blind-zone exposure on the road: the typical front blind zone runs to 2.5 m, the left side to 1.5 m, the right side to 3 m, and the area directly behind the trailer to 4 m. Two Youlai system-level modules address these zones, both configured per project rather than sold as standard catalogue items:
Construction-machinery OEMs need integrated electrical boxes that survive vibration, dust and engine-bay heat. The workhorse part on these platforms is a sealed combined relay + fuse + interface box mounted near the engine or cab post.
Excavator, loader and crane operators routinely work with the boom or attachment moving through ground-level blind zones — bystander injury accidents and minor-collision rework cost are the two pain points that drive most operator-visibility specifications on Chinese construction-machinery programmes today.
Bus and coach platforms add cabin-facing parts — passenger stop buttons, door switches, driver displays — on top of a standard chassis distribution stack. Volumes are smaller than heavy truck, and specifications change frequently between programs, so we work tender-by-tender on the cabin parts.
Bus, coach and heavy-goods programmes (UN R46 framework) increasingly specify CMS electronic mirrors in place of the traditional glass mirrors — the driver-side blind-zone reduction is significant on long coach bodies, an aerodynamic-drag reduction versus the conventional glass-mirror housings is typically reported on cross-country routes, and the centralised display lets the driver scan three views without turning the head. The two Youlai cabin-visibility modules most commonly quoted for bus programmes:
For electric and hybrid commercial-vehicle programs, Youlai supplies the low-voltage electronics layer — body control, sensing, switching and cabin parts — alongside high-voltage drivetrain suppliers. The shift for OEMs is integration density: more sensors, more harness termination points, and tighter EMC requirements close to the high-voltage system.
Validation note: low-voltage parts mounted close to the high-voltage system are validated in our in-house environmental lab + EMC pre-compliance. Youlai does not manufacture traction inverters or battery management systems (BMS).
Three published Youlai modules together build the low-voltage / safety / driver-interface side of a new-energy heavy-truck programme:
Agricultural-machinery programs share most of their electronics with construction equipment — sealed boxes, dust-tolerant switching, simple but rugged display clusters. The IP67-sealed NBX variants (NBX-971 chassis, NBX-961 excavator-class) extend naturally into tractor and harvester duty cycles.
Tractor and harvester programmes draw on the same rugged, sealed hardware proven on construction machinery — rated for dust, vibration and wash-down exposure:
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