The authors investigated the improvement of the efficiency of a diagonal fan of the cooling system of a turbo-diesel with rated power of 397 kW according to suggested method of profiling of blades, which expands the idea of ​​fans of this type.

In the article there is proposed a method of calculation of the friction work in joints of a tensioning device with the determination of average pressure and contact area of the surface of joints taking into account design features of the joint and features of its manufacturing. The influence of the coefficient of friction, type of lubricant and temperature on the value of the friction work is analyzed. The obtained data were compared with the value of work of an elastic member to evaluate the influence of friction on the efficiency of a tensioning device.

The article describes the experimental plant and its equipment for studying the parameters of internal combustion engine running on gasoline-ethanol fuels. There are also given the parameters of internal combustion engine obtained with help of this experimental setup.

The authors propose new schemes of steering mechanisms of tracked vehicles made ​​on the basis of units and components of automobiles. The mathematical model of the steady turning of tracked vehicles with such steering mechanisms are developed as well as methods for calculating kinematic parameters, power and energy loading of the elements in the scheme taking into account the power losses in the transmission and suspension. The accuracy of the mathematical models is confirmed by the results of field tests of a tracked crawler "Vegus" with the proposed schemes of steering mechanisms.

The analysis of processes of acceleration of a tractor unit and gear shifting with half engaged one-pair contact friction couplings is made on the example of a simple version of a gearbox.

The authors propose a method of presentation of transmission speeds of agricultural tractors in a matrix form which reveals a kinematic diagram of a transmission and ways to construct and modify their designs depending on requirements. The matrix form of presentation of transmission speeds helps the development of new, more efficient kinematic schemes of compound gearboxes of tractors.

The article presents the study of external infrasonic field of an automobile in real and test-bench conditions which allows to solve fundamentally new problems on identifying sources and mechanisms of developing of infrasonic sound, evolve monitoring of infrasonic fields of ground vehicles, build up a model to calculate the expected level of infrasound and suggest ways to reduce that level to the requirements of sanitary norms.

The authors consider the complex of issues that arise when assessing the technical feasibility and advisability of transporting large and easily deformable objects on roads with random irregularities.

The authors propose a new technique of calculation of strength reliability and fatigue life of metal elements of mobile machines experiencing a simultaneous loading by non-synchronous and out-of-phase random bending and twisting moments.

In this article there are considered the history of unmanned vehicles, showed the status of developments in Russia and the world, considered the issues of determining the relative position of vehicles based on optical tracking technology.

The paper describes the study of papers and specialized dynamometers designed for laboratory studies of cornering characteristics of automobile tires. Their pros and cons are revealed, certain recommendations are formulated which is intended to provide a practical improvement of performance of tires in real operating conditions.

The article describes a roller-type test bench for studying cornering characteristics of pneumatic tires and considers reasons for the need for correction of characteristics obtained on this test bench.

The article defines the ability to install hydraulic mechanical transmission with double-flow mechanism of steering of the Group I (full flow in straight running and double-flow when turning) on a tracked tractor DT-175S. In an additional drive to the summing planetary gears there is provided the inclusion of hydrostatic transmission GTS-90 with the mounting power equal to SMD-66 diesel engine power. The authors developed a kinematic scheme of the transmission and considered linear motion and rotation of the tractor.

In the article there is shown the feasibility of using of wind turbines to charge traction batteries. The analysis of wind turbines was conducted and the proper control mode of the optimal regime of a generator is chosen. Internal resistance of a battery is calculated and the method of stabilization of the electric mode of a generator is chosen.

The article proposes a combustion process of split charge for an engine with positive ignition. To implement the process there are developed and manufactured parts of the intake system and the cylinder head. The authors conducted the research on the experimental plant built on the basis of a full-sized engine with a separated cylinder which had autonomous power, ignition and exhaust systems. Comparative studies of the separated cylinder operating on the common process and the process with split charge, showed that with split charge fuel efficiency improves by more than 10% and content of carbon monoxide (CO), hydrocarbons (CH) and nitrogen oxides (NOx) is reduced by 40-50% in the exhaust gas.

The authors study an inlet system of supplying the cylinder with split charge through a tangential split inlet duct. There is built a plant at which mixing was simulated, resulting in a visual picture of the distribution of charge in the cylinder at different air flows. The calculations proved the possibility of obtaining a stable split of charge in the cylinder in case of the use of the designed inlet system.

This paper presents the description of hydraulic and electric power steering, their construction and operation

The article considers the features of changing operating characteristics of internal combustion engines with spark ignition on transition of the engine to gasoline-ethanol fuel and ways to improve energy and environmental performance of the engine.

The article presents the results of the study of the developed mathematical model of interaction of an elastic wheel with a deformable bearing surface under steady rectilinear rolling, which allows by certain vertical load on the wheel, speed of its longitudinal axis and angular velocity to determine the longitudinal component of the force transmitted by the wheel to the vehicle frame, and torque on the wheel implemented on interaction with supporting surface. Additionally simulation results determined the tractive and energy indicators of efficiency of the driving wheel under considered conditions.

The proposed mathematical model is derived from the known dependences defining interaction of an elastic wheel with deformable bearing surface, considering differences determining the conditions of the second axle wheels rolling moving in the tracks of the front axle wheels. The mathematical model allows by certain vertical load on the carriage, longitudinal velocity and angular velocity of the wheels to determine the longitudinal force component transmitted to the vehicle frame and the total torque realized by the carriage wheels on interaction with the supporting surface.

The article considers the study of the main mass-effective characteristics of contactless DC power supplies of stable voltage for motor vehicles (hybrid cars, electric cars). The study includes a comparative analysis of existing control schemes DC sources, and highlights the most effective ones.

The paper presents various ways and tasks for selection of electric starting systems with capacitive energy storage and battery for specific engines developed at the “Automotive and Tractor Electrical Equipment” Department of Moscow State University of Mechanical Engineering and their analysis.

The paper presents the method for calculating of electric starting systems with combined current source developed at “Automotive and Tractor Electrical Equipment” Department. There are shown the initial data and the basic formulas and expressions for calculation of such systems and to identification of the main energy parameters.

The paper considers the basic methods of calculating the DC motors with permanent magnet excitation. It is shown that the most accurate data on the characteristics of DC motors with permanent magnet can be obtained by modeling their magnetic and electrical fields in windings. The article gives a comparative analysis of the possible methods of modeling.

The article proposes to use capacitive energy storage in the engine electric starter system. The results of computational research shows the effect of the value of the initial charging voltage of capacitive energy storage on the basis of characteristics of the electric starting system for an automobile engine equipped with standard start-up system.

The article proposes to use energy storage in the engine electric starter system. The results of computational research shows the effect of the value of the initial charging voltage of capacitive energy storage on the basis of characteristics of the electric starting system for an automobile engine equipped with standard start-up system.

The article describes the analysis of the influence of different geometry on the hot heat carrier inlet nozzle plate air-to-air heat exchanger on unevenness of flow distribution through the matrix channels. The authors compare the geometry of the existing structure and the most promising design solutions.

The paper analyzes the main sources of acoustic noise of air exchange systems on transport, including aviation, to meet modern standards in terms of acoustic noise.

The paper proposes a functional model for prediction of durability of pneumatic tires of rock handlers, considering power losses to hysteresis and tire friction on the bearing surface.

The paper describes the experience of application of FloEFD software system for three-dimensional gas-dynamic calculation of viscous gas flow in the turbine stage of turbocharger on designing of engine turbo system.

The article provides a brief summary of the results of scientific and technological developments and their practical implementation in production of turbochargers and other units in “Turbotehnika” company.

The paper describes the process of development of software for stand for control research testing of turbochargers. The authors consider the operation with a controller and connected digital devices through the software CoDeSys V2.3 and with touch panel through the “Configurator SP200” program.

The paper considers inductor balancer with throttles for Li-Ion battery which simulated in Matlab Simulink program. The paper presents the characteristics of the inductor balancer with throttles in energy redistribution mode.

The paper analyzes the ways to normalize the thermal state of an operator in the tractor cab by volume air conditioning and by the local action considering the specifics of application objects. The authors demonstrate the rationality of use of country the same for all machines water evaporative local energy-saving air cooler in the cabins of various sizes in the operation of tractors in all climatic zones.

The paper proposes the design of innovation water evaporative air cooler for the normalization of the thermal state of the tractor operator by the local supplying of air flow. To expand the market the device has two versions: voltage of 12 V DC , based on the use of a warm period in the cab of any size ; voltage of 220 V AC , based on the use of indoor stationary objects . It may be used either on the new tractor models or on the objects in use, with no coolers.

The article describes some general methods of diagnostics of the sensors of microprocessor control systems controlling a hybrid transmission of a vehicle. The task to research the processes of sensors diagnosing is stated.

This paper proposes a new system of direct torque control of asynchronous traction motor with space vector modulation of voltage supply. The results of the simulation of traction asynchronous traction motor show advantages of the developed control system: simplicity of implementation, high dynamic performance and small fluctuations of the electromagnetic torque.

The results of experimental studies on determination of the coefficient of resistance to rolling at the steady curvilinear motion of automobiles KamAZ-4350, KamAZ-5350 and Ural-4320-31 with differential and locked-wheel drive. There was made the conclusion about the increase in a hyperbolic dependence of the coefficient of resistance to rolling with the increase of curvature of the trajectory of rotation. Possible ways of improving the maneuverability of all-wheel drive trucks with curvilinear motion on deformable unpaved surfaces were identified.

The article presents a review of the valve actuator on the controller IRMCS3041 by International Rectifier company. Hardware and software are presented to determine and compare the parameters of electric motor drives. Measuring complex was developed at the Department of Electrical Engineering and Electronics of Moscow Institute of Energy Security and Energy Saving.

The article presents the reasoning of the choice of the method and developed generalized mathematical model which describes the stationary spatial vibrations of a dynamic system of mobile wheeled vehicle that includes 12 solids, joined with 32 linear elastic – dissipative links which have 4 inputs and 20 degrees of freedom, and considers the possibility of installation continual type suspension. Algorithms of calculation of a vibration level on operator’s seat and loads of vehicle’s parts for various variants of excitation correlations on inputs of its system are presented in the article.

On the basis of the generalized mathematical model for wheeled tractor with a power of 110 kW, the calculated estimation of the effectiveness of the various levels of vibration protection systems was made (tires – rigid-axle type suspension – cab suspension – seat suspension). It is shown that on the tractor only the use of adjustable suspension for front and rear wheels with optimum parameters provides the recommended by the international standard level of accelerations on the operator's seat. Seat suspension is not needed in this case.

The paper shows the results of deformation and strength calculations in elastic-dissipative couplings of wheeled tractor dynamic system, which power is 110 kW when simulating its motion for a reference track with random profile. Spectral analysis shows the effectiveness of adjustable wheel suspensions on decrease in tractor loading and the impact on the road or the soil. Values of dynamic deflections for wheel suspensions with the optimal parameters were found.

The problems associated with the development of innovative solutions were analyzed to create a new generation of high-performance engines with direct injection of gasoline for the national transport system. Although this type of engine has a very high potential to improve fuel economy, relatively expensive and complicated system of exhaust gas and its sensitivity to the quality of fuel, especially to sulphur content, prevents the wide use of such systems in the sphere of the Russian automotive technology.

The possibility of laser light usage in automotive lighting was considered in the article.

In the proposed methodology for calculating the axial forces on the V belt transmission were used equations obtained with the account of main provisions of the spatial wedge theory.

The article is devoted to the problem of calculating the ride comfort of wheeled vehicles engaged in the movement through non-deformable bearing areas. There is shown a method, which corrects a well-known algorithm of evaluation by extending the frequency range of action of the disturbing force on dynamic models of wheeled vehicles. A comparison of the results of field testing and calculation methods is provided.

The article describes the method of conducting tests of a modern passenger car, which is in operation, with identification of the parameters of resistance movement for further and more precise mathematical modeling of controlled motion and making possible adjustments in algorithms of predicative active safety systems and systems of inter-object communication for intelligent vehicles.

The article presents the method of calculating the influence of the tolerances of main dimensions of flow part of a centrifugal pump on the spread of pressure values efficiency and critical cavitation margin with the nominal feed rate. There are discussed both symmetric and unilateral deviations of sizes.

Maintenance of controllability of mobile platforms for the robotized complexes of arms and military equipment should occur taking into account features of the limited information support of the operator, who observes the movement of controlled object through the monitor of the video channel and operating this movement by the channel of remote control. The speed control does not involve special difficulties, but the stop of object in front of suddenly detected obstacle should take place with a minimum delay. At the same time, to provide trajectory manageability taking into account the inevitable inertia it is recommended to enter into structure of the management system the forcing control signal by the first derivative and the feedback on the actual rate of turn.

The article theoretically substantiates a possibility of self-excitation of oscillations of wheeled tractors frame in the longitudinal plane when working in traction mode. There was used the dependence of rolling pneumatic wheel radius from the vertical load and torque, mathematical model of a rolling pneumatic wheel with variable vertical load and dual-mass linear model of oscillations of the tractor frame in the longitudinal plane.