I. Definition and Positioning
A truck is a commercial motor vehicle primarily used for cargo transportation, usually equipped with a special cargo compartment or loading platform. It has much higher load‑carrying and towing capacity than passenger vehicles, serving as core equipment for modern road logistics and engineering construction. In some scenarios, it can tow trailers to form a combination vehicle (semi-trailer / full-trailer).
II. Standard Classification System
By Gross Vehicle Weight (commonly used in China)
- Mini-truck: GVW ≤ 1.8 tons, mostly for urban last-mile delivery and small-scale freight;
- Light-duty truck: 1.8 tons < GVW ≤ 6 tons, the main vehicle for urban / intercity short-distance delivery;
- Medium-duty truck: 6 tons < GVW ≤ 14 tons, for medium-to-long distance dedicated routes and regional distribution;
- Heavy-duty truck: GVW > 14 tons, for long-haul trunk lines, mining engineering, and heavy-duty transportation (including tractors).
By Structure / Application
- General stake / grid / box truck: for general freight;
- Dump truck: for sand, gravel and dregs at construction / mining sites, with hydraulic lifting for automatic unloading;
- Tractor truck: for towing semi-trailers, the core vehicle for long-haul trunk lines;
- Special-purpose truck: refrigerated truck, fuel tank truck, concrete mixer truck, garbage compactor truck, etc.
By Cab Style
- Cab-over-engine (COE): good visibility, short wheelbase;
- Conventional cab: superior crash safety and comfort.
By Drive Type
4×2, 6×2, 6×4, 8×4, etc. (the first number is total wheels, the second is drive wheels).6×4 is suitable for heavy loads / unpaved roads; 4×2 is suitable for standard loads on highways.
III. Core Structure Components
- Power System: Heavy-duty models mainly use diesel engines with high torque and good fuel economy. New energy (pure electric, hydrogen fuel cell) is rapidly popularized in urban distribution, matched with manual / AMT automatic transmission.
- Chassis System: Frame (load-bearing framework), axle, suspension, brake (drum / disc + ABS/ESC), steering system. It is the foundation of load capacity and handling.
- Body and Cargo Compartment: Cab (including human-machine system), special cargo compartment / superstructure (dump, box, flatbed, etc.).
- Electrical and Auxiliary Systems: Lights, ECU, tire pressure monitoring, lane departure warning, collision avoidance system, etc.
IV. Main Application Scenarios and Model Selection
| Scenario | Recommended Model | Key Configurations |
|---|---|---|
Urban cold chain delivery | Light / medium-duty refrigerated box truck | Independent refrigeration unit, temperature control system, compliant superstructure |
Long-haul trunk freight | Heavy-duty 6×4 tractor + container semi-trailer | High horsepower + AMT + hydraulic retarder |
Mining / infrastructure | Heavy-duty 6×4 dump truck | Reinforced chassis, wear-resistant cargo box, off-road tires |
Urban express last-mile | Mini / light-duty box truck | Narrow body, high mobility, low energy consumption |
V. Technology Development Trends
- New Energy Electrification: Penetration of pure electric light trucks is rising rapidly; heavy trucks are developing hydrogen fuel and hybrid power.
- Intelligence: L2+ autonomous driving is applied on trunk lines; Internet of Vehicles and fleet management systems are widely used.
- Lightweight and Compliance: Application of high-strength steel and aluminum alloys, strict implementation of the GB1589 load standard.
VI. Safety and Compliance Requirements
- Driver’s License Classification: Class B2 is valid for medium-duty and below trucks; Class A2 is required for heavy-duty tractors / semi-trailers.
- Overload and Over-limit Control: Directly affects safety and operating costs.
- Maintenance: Regular inspection of engine, chassis, brakes and tires to avoid brake fade on long downhill sections.
