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| Part Category | Key Functions |
|---|---|
| Steering axle | Mainly responsible for achieving the steering function of the vehicle. Core components include the front beam, steering knuckle, kingpin and hub. |
| Drive axle | Transfers the engine's power to drive the wheels. Includes main reducer, differential, half shafts and axle housing. |
| Support Bridge | Combines steering and driving functions. Commonly found in all-wheel drive (4WD) or front-wheel drive vehicles. |
| Auxiliary Axle | Used to support the weight of the vehicle body without steering or driving functions. Installed on multi-axle trucks. |
| Auxiliary Filters | Includes steering assist oil filters, brake oil filters, and oil mist filters to protect specific systems. |
| Lubrication system | Includes oil pump, filter, and oil pan to provide lubricating oil to moving parts and reduce wear. |
| Electronic control | Monitoring engine status via sensors (crankshaft, knock, throttle) and the ECU for intelligent control. |


