Vol 7, No 2-1 (2013)

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.

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 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 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 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.

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 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.

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.

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

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 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 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 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 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 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 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 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 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.

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 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.

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 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.

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 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.

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 method of calculation the number of diesel engine working cycles is described. There are given the ICE theory corresponding formulas and corresponding graphics of number of working cylinders on total number of engine cylinders dependence.

The article is devoted to the revealed regularities of the process of shaping in design of concept arts, concepts and production prototypes in transport design, derived from statistical analysis of results of the developed and conducted the Internet survey. In addition, this article proposes a model of design development process consisting of three levels of factors. The influence of the effect of key factors such as style, structure, technology and materials on designer's work when developing vehicle design is studied. The algorithm of through design is proposed as a result of the conducted study.