One of the design measures to improve the patency of large trucks and trailers can be differential lock. Conducted at the Minsk Automobile Plant studies revealed the feasibility of forced-24 tive differential blocking in support of driving wheels on the road with different friction coefficient. The results are shown in Table. 1. The greatest effect was observed lock when one wheel axle moves on ice, snow or sand, and the other on dry asphalt or hard ground. At the same pulling power increases to 50%
Basic parameters and design of the vehicle, determining its permeability, chosen for typical operating conditions and vehicle assignment. First of all, you must assume that the geometric, dimensional parameters of the vehicle must not restrict cross the prescribed limits (ground clearance, front and rear corners of the cross, the radii of the longitudinal and transverse cross, etc.) Then find towing weight of the car or train with a cargo and without load, which determines wheel formula car or truck and concrete designs.
Based on the need to improve the driving characteristics and desires above all to avoid critical situations at the entrance on the rise, especially in bad weather and road conditions, often offer to introduce certain factors coupling weight (the ratio between the total weight and the load on the axle). For example, under the movement EEC (European Economic Community) for trucks with tractor 4X2 offered the following factors: in Belgium - 3.0, Italy, Luxembourg - 3.7, UK - 3.8.