Kinematic discrepancy between driving wheels evaluated for a modular traction device

One of the options for increasing the versatility of tractors is to use them as a part of a modular traction device (MTD). The model MTD-100 consists of a power-generator module and a technical module. The power-generator module is a tractor with a nominal traction force of 14–16 kN. The technical module is an additional axle with wheels driven by the power-generator module ground speed power take-off. For agricultural implements whose traction resistance does not exceed 16 kN, only the tractor is used. When the technical module is attached to it, the traction force of the entire MTD-100 increases. The MTD-100 makes it possible to tow implements with a traction resistance of up to 30 kN. Since the rear wheels of the power-generator module are connected by a locked drive to the wheels of the technical module, there is a kinematic discrepancy Kv between them. Our studies have established that the greater the Kv value, the greater is the inflation pressure of the tyres on the wheels of the MTD-100 power-generator and technical modules. If it is necessary to ballast the MTD-100 technical module, the inflation pressure of its tyres should be increased. This makes it possible to maintain the value of the kinematic discrepancy coefficient Kv unchanged. Replacement of the standard 16.9R38 tyres with15.5R38 tyres on the rear wheels of the power-generator module and the wheels of the technical module of the MTD-100 requires practically no adjustment to their inflation pressure.