The system control test bench, fuel equipment of diesel engines. The use of asynchronous motor together with the Converter of frequency allows to create an effective budget system of adjustable electric drive for maintenance of necessary speed asynchronous electric drive depending on pressure. The proposed management system provides the fuel supply pressure-stable, leading to a significant decrease in hydraulic loads of fuel and diesel equipment. The use of frequency Converter reduces the dynamic load on the engine and optimize operating currents, which creates conditions to reduce energy consumption and increase the service life of machinery.

The mathematical software computer aided design (CAD) of objects of production and transport infrastructure in timber industry (TI) is given, feature of which is the following. Tasks of establishing the optimal placement options of spur road on felling and loading points along it are solved together. At the next stage, the structural design of collapsible coatings of spur roads and topping hair-pin bend is made, if such coating is provided. Depending on the characteristics of accepted structures of the brain and deep sections of spur roads its length in the cutting area.

Presented software for evaluation of CAD Highway Capacity. Analytical dependences for determining the capacity of the road and number of lanes in one direction, shows the procedure for solving the problem in CAD.

Mathematical and software to study in CAD parameters of the adjacency of roads in one level at a sharp angle. The algorithm description, input and output parameters. The proposed algorithm and the program allows CAD roads to justify the parameters of the adjacency in one level at a sharp angle with requirements of traffic safety.

To ensure high performance of the agricultural machinery and equipment it is necessary to improve the system of technical service in agriculture through the creation of specialized service centers. Features of agricultural production are such that machinery and equipment implementing its processes are distributed throughout the agricultural enterprises, and mobile machines and units that form the basis of machine-tractor fleet, change their place of deployment as work progresses in certain areas. This situation complicates the maintenance (M) and current repairs (CR) of agricultural machinery and equipment, as their delivery of their service centers or check out of service technician with the necessary tools, equipment and materials directly to the operation of machines and equipment, or temporary storage sites are required. The result is more expensive M and CR and increased losses from downtime, of course these additional costs and losses must be minimized by the rational organization of processes of M and CR. Analytical dependences are got to determine the costs of the M or CR, taking into accounts the embodiment of losses from downtime of serviced machines and the method of its delivery to the service center. Selecting embodiment of M or CR is carried out on a minimum of these costs, for which the algorithm is proposed, comprising determining the costs of the options under consideration to perform M or TP and compare them to avoid irrational choices. These analytical dependence and calculation algorithm contribute to the improvement of the organization of technical services in agriculture.