Vol 82, No 3 (2015)
- Year: 2015
- Articles: 13
- URL: https://journals.eco-vector.com/0321-4443/issue/view/3616
Articles
Improvement of environmental performance of tractor diesel by the use of compressed natural gas and exhaust gas recirculation, methanol and ethanol fuel emulsions
Abstract
Possibility of improving environmental performance of diesel engine by the use of compressed natural gas and exhaust gas recirculation, methanol and ethanol fuel emulsions is determined. It allows to reduce nitrogen oxides level in exhaust gases, to save diesel fuel and to improve effective performance.
Tractors and Agricultural Machinery. 2015;82(3):3-6
3-6
Overcoming vertical obstacles and ditches by car and wheeled tractor
Abstract
Functional dependencies between all relevant parameters of wheeled vehicles of different drive types and driving conditions with maximum height of obstacle and width of ditch are obtained for the first time. The dependencies allow to ensure at the design stage the optimum axle weight distribution of machine for specified operating conditions, and thus maximum possible traction force and cross-country ability. The influence of resistance of motion on cross-country ability of wheeled vehicle is shown by specific example.
Tractors and Agricultural Machinery. 2015;82(3):7-10
7-10
To the problem of power distribution between the wheels of mobile machine
Abstract
The paper deals with the problem of minimization of power for mobile machine movement by means of its distribution between wheels. Comparison of total required power values is made by the examples of most common methods of mobile machine control, namely using of unblocked differential, limited-slip differential, full blocking of differentials.
Tractors and Agricultural Machinery. 2015;82(3):10-12
10-12
12-18
19-22
22-27
Aerodynamic configurations, characteristics and application of transverse fans
Abstract
Aerodynamic configurations and characteristics of transverse fans are given. Their advantages in comparison with radial and axial fans are determined. In particular, transverse fans may have different width under the same rational configuration. Due to it, when recalculating the characteristic by similarity method, the field of their application is significantly enlarged.
Tractors and Agricultural Machinery. 2015;82(3):27-33
27-33
Results of field researches of a seed drill equipped with sowing devices with asymmetrical profile of seed cells
Abstract
A seed drill equipped with sowing devices with asymmetrical profile of seed cells and with a ledge in the form of hypocycloid has been developed and made. Optimum values of design parameters of seed roller in actual practice are determined. Original methods for determination of seeds distribution in a row and crushing of seeds in laboratory and field conditions are given.
Tractors and Agricultural Machinery. 2015;82(3):33-37
33-37
Exploitation effects of using minerals as active agents of lubricants
Abstract
On the results of bench tests of serpentine additives to lubricants for internal combustion engines of various types the main exploitation effects of that kind of substances as a new class of raw materials for chemmotology are generalized. It is concluded that minerals belong to the classification group of friction modifiers. Calculation models and ways to increase the affinity of components of mineral additives to metals providing longevity of formed protective coatings are considered.
Tractors and Agricultural Machinery. 2015;82(3):38-44
38-44
44-47
Point estimation of distribution parameters of overhaul period of imported hydraulic valves for agricultural machinery
Abstract
As a result of researches of operational reliability of imported hydraulic valves in ordinary conditions of operation, lower confidence limit of the average value of operating life for the general mean failure time corresponding to specified confidence probability was determined.
Tractors and Agricultural Machinery. 2015;82(3):47-49
47-49
Restoring of moldboards by abrasion-resistant dispersion-strengthened composite based on epoxy resin
49-51
52
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