Vol 9, No 1-1 (2015)

The paper presents a new principle or real load condition simulation during vehicle testing on a chassis dynamometer. The authors developed a mathematical model of an 8 × 8 car dynamics on the stand and on the road. The results of modeling simulation proved the efficiency of the proposed approach to stand management on the example of an 8 × 8 car with individual wheel drive. The article also grounds the directions for further research, based on the present principles.

The article considers the possibility of improving starting characteristics of small-size diesel engine type CH8,5/11 by replacing vortex combustion chamber by piston combustion chamber. The authors present the formulas for determination of optimum amount of cycle fuel supply in diesel engine start mode, fuel vaporization in start mode in volume and from the wall of a cylindrical combustion chamber. Results of experimental studies show the influence of cycle fuel supply on duration of small-sized diesel start-up.

The article presents the results of calculation and experimental determination of fuel consumption of a light commercial truck on a country road route.

The paper formulated and solved the problem of conventional nonlinear technical and economic optimization of placement and height of intermediate support structures for design of cable subway lines in highly urbanized city environment.

The article describes the design of regular structure flat-slit irrigated nozzles of porous plastic plates with hills with various nature of airflow in their channels. It is shown that the intensification of heat and mass transfer (turbulence due to the artificial movement of air in the channels) provides a significant reduction in the size of the nozzle when the desired effectiveness of lowering the temperature of the processed air and acceptable aerodynamic drag.

The article deals with the creation of optimal control logic for semiconductor switches transistor inverter for induction motor frequency control in order to eliminate through current in inverter racks. The author gives a particular version of the circuit to solve this problem.

The investigation of the gas-dynamic processes in a pneumocylinder with two-way action on the base of the computational fluid dynamics methods are carried out in this work. To describe gas movement three-dimensional Navier-Stokes equations averaged according to Reynolds are used. A shock-wave structure in piston cavity of the pneumocylinder is studied. The estimation of the velocity influence of the pressure increase on the shock-block structure of the flow and pneumocylinder characteristics is carried out.

The article describes the design requirements for the design of the hydraulic control system of stationary and mobile objects, the basic design requirements for hydraulic stationary and mobile objects, ensuring the reliability of the hydraulic control system of stationary and mobile objects.

The article analyzes the layout solutions for transmissions vehicles on low pressure tires. It is shown that in most cases their transmissions are assembled from finished units of vehicles in production in Russia. Thus wheel drive becomes complicated, transmission components’ life time decreases and typical operational failures appear. The paper presents statistical data on failures of TREKOL-39041 vehicles operated in the Volgograd region, as well as the listed shortcomings of the existing method of calculation of ratios of transmissions.