Research Article
Modeling of Lateral Stability of Tractor-Semitrailer on Combined Alignments of Freeway
Table 1
Main parameters of tractor and semitrailer.
| | Category | Parameter | Value |
| | Size and weight of tractor | Gross vehicle weight (kg) | 25000 | | Unladen mass (kg) | 7880 | | Maximum towed mass (kg) | 39600 | | Length (mm) | 6895 | | Width (mm) | 2465 | | Height (mm) | 3060 | | Wheelbase (mm) | 3400 + 1300 | | Front track (mm) | 2060 | | Rear track (mm) | 1855/1855 |
| | Size and weight of semitrailer | Length (mm) | 13000 | | Width (mm) | 2500 | | Wheelbase (mm) | 6831 + 1310 + 1310 | | Sprung mass (mm) | 6250 | | Maximum load (kg) | 33000 |
| | Powertrain | Rated power/engine speed (kW/rpm) | 265/2000 | | Maximum torque (Nm/rpm) | 1422/1400 | | Compression ratio | 17.5 : 1 |
| | Suspension | Unsprung mass (kg) | Steering axle: 570
Drive axles: 785
Trailer axles: 690 | | Axle roll and yaw inertia (kg⋅m2) | Steering axle: 335
Drive axles: 305
Trailer axles: 266 | | Spring stiffness (N⋅mm−1) | Steering axle: 250
Drive axles: 700
Trailer axles: 2500 | | Damping coefficient (N⋅s⋅mm−1) | Steering axle: 15
Drive axles: 30
Trailer axles: 30 |
| | Brake torque | Steering axle (kN⋅m) | 7.5 | | Drive axles (kN⋅m) | 10 | | Trailer axles (kN⋅m) | 10 |
| | Tires | Tire size | 11.00R20 | | Effective rolling radius (mm) | 528 | | Unloaded free radius (mm) | 542 | | Maximum allowed force (kN) | 100 |
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