Influence of back pressure, caused by turbofan, on engine parameters at nominal mode is defined by mathematical modeling of the turbodiesel (power 404 kW) with turbofan intercooling system.

The article provides a summary of performance of vehicle transmission and brake control for formulating and solving multiobjective parametric problems with adjustable design parameters. Characteristics for regulation of design parameters of transmission and brake control of class “B” passenger car are determined based on the road microprofile.

The paper describes the test-bench for testing of tractive ability and efficiency of belt drives with different methods of belt tensioning.

The article considers the results of experimental researches of tractive ability of belt drives with different methods for belt tensioning.

The article considers the problems of stability and controllability of the car with a combined power plant on changing of drive type in motion.

The article describes the prospects of development of medium cargo urban vehicles with combined power plants using components manufactured in Russia. It also describes advantages and disadvantages of the chosen layout of powertrain. The authors justify the necessity of application of test benches for experimental studies.

The authors consider the method of object life estimation in the conditions of quasimonotonous degradation of system quality parameters, invariant relative to a class of generally non-stationary stochastic process of complex structure.

The article describes the principle and method of constructing a simulation circuit of balancing devices with switched capacitors for Li-Ion battery in Matlab Simulink program. Conclusions are drawn about the possibility of balancing device with a battery of an electric vehicle.

In article the approached method of calculation of noise of admission ICE, based on dependences between noise level and parameters of a stream of air in an inlet branch pipe of the engine which are received by numerical calculations is considered. Errors of the offered method are resulted.

The article contain main principles and formulas which allow to predict possible weight or price benefits of introduction of new materials in sandwich panel structure used as floor or roof of self-carrying bus body during early steps of structure development. Weight, mechanical and price properties of materials and discrete row of sheet thicknesses are taken into account.

This article considers the developed vector-matrix method for determining of driving forces and reaction forces in kinematic pairs of multilever linkage with adjustable closed circuit, which allows obtaining of analytical expressions of desired parameters in an explicit form. As a result of the kinetostatical analysis of lifting mechanism there are received recommendations for selection of a hydraulic cylinder.

The article describes the existing automation of petrol stations, it points to major drawbacks of existing systems. The authors offer an option of complex automation of petrol stations with introduction of the system at gas stations “Gazpromneft-center”.

The paper presents a method of piecewise continuous regulation of tractor speed, based on using rational choice of a rather small range of correction characteristic of a diesel engine, where power does not decrease below nominal, and the fuel efficiency is improved by reducing of engine speed.

The paper considers influence of tire tread temperature on durability of rock handler truck tires. The authors present the results of research of tire heating nature during operation. By the statistical treatment of experimental data the regression models of the multifactor processes are obtained.

The article contains results of studies of PAZ bus brake performance. For this research there are approaches used during road tests and for computer modeling, simulating the conditions of a real test. The authors give a comparative analysis of the results obtained during simulation of braking process and in road tests of the bus.

This article considers an automobile generator of reciprocating motion type with a free piston, which is an integral unit converting mechanical energy of the reciprocating motion of engine pistons into electrical energy for use as an on-board power supply of hybrid vehicles. The authors examine advantages of this method of converting of thermal energy into electrical energy and design issues. The papers formulates the requirements to the linear electric generator with a free piston. It also includes a brief review of linear generator developments.

This article considers the integrated propulsion system, consisting of internal combustion engine with a free piston and linear electrical inductor machine with permanent magnet on the stator. The authors investigate the regenerative mode of the linear inductor machine operation and compare two systems of permanent magnets layout. There are data presenting calculation of linear electric machine performance.

The article defines the criteria for selecting of layouts and rational layouts for wheels, passengers and powertrains for a compact urban vehicle.

The paper considers the process of evaporation and homogenizing of fuel-air mixture in the engine running on the Otto-Diesel cycle.

This paper describes the development of a two-stage turbocharging system, allowing to achieve the requirements of emission standards EURO-5 on the engines of KAMAZ.

The article presents an overview of the information technology systems, implemented at Scientific and Production Association “Turbotehnika” for development and production of turbochargers and other components and engine systems.

The paper describes non-motorized bench for testing turbochargers: design, concept, method of characterization.

The paper describes a turbo system based on a hybrid turbocharger, its advantages over a conventional turbocharger, design, performance, operating principles. The description of a control system of the turbo-electric compressor is also given in the article.

The paper presents the main steps of determining the optimal direction of the production of internal combustion engines.

The paper presents the design of various types of active-terrain trucks. The authors provide technical solutions and methods for linking of trains by active wheel modules with hydrostatic wheel drive. The article also contains the analysis of the traction capabilities and an estimate of the damaging effects of trucks on the ground with the active and inactive trailing links.

The paper presents the results of computational modeling of thermal processes in mesh matrixes of rotary frame heat exchangers. The authors received the refined dependence of the mesh matrix heat transfer of the coolant flow characteristics.

The paper considers a model of combustion powdered energy-accumulating substances (EAS) in a cylindrical combustion chamber. This camera can be considered as a prechamber of the hydrogen reactor for transport and stationary power plants based on gas turbine engines. For calculations of combustion of powdered EAS in the flow of superheated steam a program is developed. Distribution of the temperature in the chamber axis at different values of the coefficient of oxidant excess (water vapor). The authors determined the size of the depth of the flame front at the given conditions of the combustion chamber with energy-accumulating substances.

The paper considers the results of mathematical modeling of strain state of a non-uniformly heated ceramic frame of rotary heat exchanger of multi-purpose gas turbine engine with the power of 300 kW . Received a conclusion that the implementation of frame heat exchanger made from ceramics will enable the design of the rotary heat exchanger with high degree of regeneration (95-97%), without increasing the amount of air leaks through the seals of the heat exchanger.

The results of experiments by vibratory response of plate elements of five different materials with different dimensions and boundary conditions are given in the article. The effects of vibration-absorbing and composite materials on vibratory properties are considered. The major attention has given to the changing of frequency spectrum of vibrations and damping coefficient. The comparatives diagrams of damping coefficient are given. Conclusions and recommendations are made.

The paper presents the results of nature piling tests simulating mine explosion of armored vehicles. The tests were conducted to evaluate the effectiveness of anti-mine energy-absorbing seats. During testing by measuring the dynamic parameters in the design of the seat and the man modeled by anthropomorphic dummies "Hybrid 2" and "Scythian". The test results allowed to create a mathematical model of anti-mine seats and to make a comparative analysis of numerical and experimental data.

This paper considers mechanism of explosive mine impact on the armored vehicles and crews. The authors presented integral estimations of explosion, allowing to carry out calculations for dynamics and strength of the undercarriage, and the criteria for assessing the risk of injury of crew members. There is an analysis of possible ways to improve the design of mine resistance of armored vehicles.

+7(495)223-05-23 ext. 1507, kulakov@mami.ru The article presents the results of calculation and experimental study of a composite ceramic armor resistance when exposed to high-speed bullets and fragments. Based on the analysis of the experiments the authors refined a finite-element model, which allowed to make multiple calculations of various structural designs of armor in order to choose the most rational. Authors show influence of geometrical parameters of a ceramic element on the strength of armor.

The paper gives a theoretical background of the development a control strategy for a hybrid electric vehicle (HEV). Properties of a HEV that define its fuel economy and pollutant emissions are briefly described. Analysis of energy flows in a HEV’s powertrain is carried out. Based on this analysis a way to optimize energy flows is proposed. Said way implies a method of optimal control theory, namely dynamic programming, to be utilized. HEV’s model implemented in a DP-based routine is presented. Some theoretical background about DP is given as well. The most interesting results of DP-investigations are presented in the next section. The last section of the paper contains some conclusion remarks.

The paper presents the results of research carried out by the State contract, and also the proposed science-based technique for development of "intelligent" automatic adaptive transmission control of multidrive wheeled machines.

In the article there are presented the results of research of the developed mathematical model of linear motion of all-wheel drive three-axle vehicle with individually controlled hydrostatic drive of its driving wheels which allow to justify the need of usage of series option of control in the system of automatic adaptive control of hydrostatic transmission.

Suggested by the authors mathematical model was obtained on the basis of a combination of known relationships that govern the interaction of elastic wheel with non-deformable bearing surface, with recommendations for taking into account of additional forces in the area of ground deformation by a wheel. Mathematical model allows to define the longitudinal component of the force that is transferred to the machine frame and, at the same time, the moment occurring on the axis of the wheel using vertical load on the wheel axle, the longitudinal velocity of the axis and the longitudinal slip in the contact area.

Bekaev@list.ru Based on the electrohydraulic effect, also known as the “Yutkin effect”, the authors developed a brand new design of an electro-hydraulic fuel pump of high pressure, providing performance superior (for pressure and flow rate) than modern high pressure fuel pumps of internal combustion engines. Application of the developed electro-hydraulic pump for internal combustion engines will completely eliminate the use of a mechanized actuator, an integral part of modern fuel pumps, and thus greatly simplify the design and operation of fuel system, reduce its metal content, cost and noise.

The article describes the different types of loading of a wedge in the process of work, considers the forces acting on a wedge for the various types of loads and proposes the method of accounting of appearing loads.

The paper examines different methods for calculating of belt transmission to assess the reliability of the results. In the end it is concluded that it is needed to consider the belt rigidity to obtain reliable results.

The article provides an overview of modern trends of passenger car safety in the context of developing information technologies.

The paper considers the information and energy converters from the standpoint of engineering systems. A set of elements is transformed into the system due to the exchange of information between the elements, therefore the quality of any system is defined by the processes of information transfer in its elements and the system as a whole. The paper also considers kinetics of information processes and its influence on quality management systems.

In developing of products for any purpose it should be determined their compliance with the modern technology level. The paper proposes indicators that determine the level of development of modern technology.

In this article the engineering method of calculation of gasdynamic foil bearings is considered. Calculations according to this method were made and comparison with the experimental results, obtained by other authors, was done. Ranges of application are also considered.

The paper considers the problem of strength analysis of advanced vehicle frame for transporting of long loads. There are offered the measures of modifying of the frame construction. With offered alternatives of improvements there were built mathematical model and defined values ​​of the stresses and deflections in the frame of the unit for all cases considered.

In the process of automotive components approbation it is necessary to use test bench equipment which allows to evaluate characteristics of components for compliance with the documentation requirements. In the article there is presented a test bench allowing to take measurements of elastic characteristics of the clutch pressure disk.

This paper proposes the unified control algorithm for torques delivered to wheels of all-wheel-drive vehicles with “intellectual” transmission. The algorithm provides the determination of torques delivered to each wheel of multi-axis vehicle with minimal loss of power regarding to road conditions: solid surface or deformable ground. Results of calculations were confirmed by experimental research.

The article describes the results of the calculations of kinematic excitation characteristics from the profiles of artificial tracks, which should be applied when assessing the machinery vibration standards compliance. The authors presented the basic properties and selected the most representative tracks for calculation and nature experiments to improve the systems of vibration protection.

The article is about the mathematical model, which is used for development of a computer model of the heat engine with external combustion. Computer simulation allowed to establish main principles of heat engine operation and make the analysis of the impact of changes on its characteristics and develop variant of the engine design.

In the article there are presented structural and kinematic schemes and the design of the module of automatic gearboxes on the basis of universal multiple differential mechanism, designed by the authors. There is also considered the method of kinematic and force analysis.

There is considered the plane motion of rolling wheel in conjunction with geometric and power relations of forming of contact area. There is established that the transformation of the connection is accompanied by mutual deformation of contacting surfaces with arising of friction forces, caused by the repacking of soil particles and other factors. There is defined the energy state of the “wheel-contact patch” system and its general characteristics of movement.