Vol 4, No 2 (2010)

The article describes strength calcualtion on the casted axle housing of the truck using FEM-software and its further form optimization with topology optimization software, performed for RD center of KAMAZ JSC. The optimization provided 17% mass reduction of the casting.

The paper considers mechanical characteristics of automotive tyres. The authors show that influence of lateral force on a wheel not only causes lateral deformation of the tyre, but also increases her normal deflection.

Article is dedicated to study of the influence of damping in running gear units and stabilization arm of steerable wheels on their free vibrations.

The article is about development of methods for improving of acoustic characteristics of diesel engines. This article gives proof of the necessity to create the highly effective muffler for diesels. The authors also offer ways of improvement of the design of the mufflers.

In a hybrid electric vehicle (HEV), IC engine can be operated independently (to a certain extent) of vehicle's speed and power demand. Therefore, there is a substantial flexibility in adjusting HEV's fuel consumption and emissions by varying ICE's operating point. Due to high complexity and non-linearity of hybrid powertrain's characteristics it is necessary to use some mathematical tool to derive an optimal combination of ecological and energy consumption properties of HEV. It is generally accepted that dynamic programming (DP) is well suited for such a task. A DP routine based on the HEV's model was developed and implemented in MATLAB/Simulink environment. A number of runs were executed. Results have revealed an apparent trade-off between fuel effectiveness of HEV and NOx emissions. Based on comprehensive analysis of results, certain ways to deal with this trade-off were offered.

The resulting data of the analytical review that been held during research engineering against State contract № П1131 02.06.2010 are described in this article. Submitted data characterize present status of the issue and define problems that appear in case of designing multi-drived wheeled vehicles with off-road capability and become basics for development of methods for building automatic adapting controlling systems for adjusting transmissions for that kind of vehicles.

The influence of dimethyl ether additive in methane−air mixture on the combustion process of HCCI engine is reported. Computational experiment has been conducted on two models of the working process of HCCI engine. One of them is a single-zone chemical-kinetic model and the other is a mathematical model based on formal chemical kinetics. The results of the numerical experiment are supported by data from full-scale experiment.

This paper presents a method to study of the influence of structural parameters on the dynamic load in the mechanical automotive transmission with hybrid power unit (HPI). The results calculation dynamic loads in the branches of UAZ 5153 parallel hybrid drivetrain are presented.

The article analyses conditions of lubrication film formation in the friction pair gap of face seal.

If the vehicle has individual drives of the leading wheels, and their traction loads or friction conditions are asymmetric, the stability of strait-line motion needs difference of theoretical speeds of both sides. This difference cannot be programmed before, and can be made by the driver within manual operation, but automatic or remote control needs automatic correction on the base of trajectory measuring. There is a similar problem connected with automatic correction of turning control high-speed truck vehicles under conditions of possible skidding. We consider as the most comfortable using of angle speed sensors.

The paper describes a two-phase method of multiobjective task solution in mechanical engineering according to steerability and stability criteria. The method allows to solve tasks involved in automotive design subject to roadway covering characteristics in the driver-vehicle-road system. The paper describes laws of suspension adjustment by stiffness and damping parameters subject to various road conditions.

The spectral luminescence properties of poly-p-xylylene films irradiated by impulse UV- laser were studied. It was shown that the UV-laser irradiation to leads to the effective formation of new optical emission centers in the polymer chain. The fluorescence band of these centers is found over the visible range.

The article is about the tests of a mobile technological unit. The objective of investigation is to develop the grinding techniques for sealant surface formation inside valve housing.

The main objective of this research is the analysis of influence of optical and thermo radiating characteristics on the transient (steady state) temperature distributions inside the heat-insulating semitransparent (SHIC) и opaque (HIC) coatings for thermal regulation and control of walls and elements of the combustion chamber (СС) high speed diesel engines. Developed author's methodology of physical and mathematical simulation of parameters of the radiant and heat conductivity transfer was used to calculate optimal balance of optical and thermo radiating characteristics of coatings - as selectively absorbing and scattering materials with different transmittance, reflection and emittance depending on wavelength diapasons of irradiating or radiating heat fluxes. The paper presents a mathematical simulation of optimal balance of improved optical (transmittance, reflectance, absorption coefficients or absorption, scattering indexes) and thermo radiating (emittance coefficient) characteristics. It is considered the effect of the subsurface volumetric heating which at their display promotes decreasing of a surface overheating of coatings of the combustion chamber. It have been received by the numerical method temperature distributions for semitransparent heat-insulating coatings protecting metal substrate (CC wall) with different reflection of penetrating radiation by SHIC layer. It has been shown decreasing the surface temperature of SHIC in comparison with temperature of opaque HIC. The methods of improvement of thermal isolation of the combustion chamber with use heat-insulating coatings c are offered: 1) high volume reflection rλ > 60-80 % for thermal protection (barrier) against intensive radiation of red-hot soot particles of soot (λ ~ 0.7-2 μm) and 2) high surface emittance ελ > 80-90 % (λ >4- 5 μm) for counteraction convectional heat flux inside CС a diesel engine.

The article considers basic thesis of two-exponential model of magnetophoresis control of analyzing mediums samples. Data of ferroimpurities mass and those concentrate definition are given for moulding mixture and sugar.

The results of investigations of properties of nanostructured coatings are described. The project contains study of electrode potential of specimens with coatings, corrosion and relaxation resistance, tests of thermal cycling. Obtained results allow to estimate advantages of nanostructured coatings in comparison with single-layer and multilayer coatings.

The paper offers the method object resource valuation a in the conditions of quasimonotonous aggravation of system quality parameters, invariant concerning a class generally a non-stationary stochastic process of difficult structure.

The paper presents a research of dependence of adsorption of different ions on a titanium dioxide surface on the pH medium. Equations describing the dependence are presented. It is offered to describe the dependence by means of the acid-base equilibrium that arises on border of TiO2 electrolytic solution phases. It is found that the value of ion adsorption depends on pH. Optimum рН values which were obtained in the course of experiments are presented.

The paper considers the questions involved the use of scientific potential of high schools to emerge from the system and world crises.

The paper presents an analysis of financial, economic and manufacturing areas of Russian economy. The authors provide an analytical apparatus for assessment of economic system, which makes it possible to determine a economy stability factor and degree of economic crisis risk. This information can serve as a basis for management decisions.

This article argues that in the era of information warfare the development of a meaning theory and its applications becomes a strategic objective.

In the clause influence on a market share of national cars of level of non-uniformity of income distribution among the population is described. Necessity of improvement of quality of cars of the Russian production and the problem resolution of social intensity is proved.

The paper considers the use of graph method in reliability theory subject to practice of technical service.

The paper highlights the questions of fundamental education as the bases for making a top-class expert and the problem of moral and spiritual values of young experts as the representatives of an intellectual level of a society and the persons who bear the responsibility for the future of our country.

The paper substantiates the need for territorial corporate space, based on the concentration of the intellectual capital of universities and large enterprises, that will consolidate the efforts of key business entities to implement the main perspectives of socio-economic development of the region.

The paper describes the quantitative parameters of the stability reserve of fighter poses subject to value of external forces, their duration. Two types of pose reaction which provide balance or bring to irreversible loss of stability are revealed.

The paper deals with designing an interface for projects MATLAB and its realization in the programming language C, schemes and methods of interaction of application C and the environment MATLAB including local area network (LAN). The methodology of this interface operation is suggested. The need for interface between the application C and application packages for solving technical computing and comprehensive study of students of different levels of programming languages is substantiated.