AMMONIA CONCENTRATION CONTROL IN SELECTIVE REDUCTION SYSTEMS OF NITROGEN OXIDES OF DIESELS

Demidov Alexey A., Cand. Techn. Sc. Project Director “Diesel Engine” SSC

Nadareyshvili Givi G., Cand. Techn. Sc. Head of the Department “Antitoxic and Noise Reduction Systems” SSC, This email address is being protected from spambots. You need JavaScript enabled to view it., FSUE “NAMI”, Moscow, Russia

Titchenko Andrey Yu. General Director LLC “NTC MSP”, Moscow, Russia

Reduction of toxic components in the exhaust gas of diesel engines to the level of the requirements of Euro 6 is a socially important and technically complex problem. The problem of optimal dosing of the urea solution and release free ammonia exception beyond neutralization system is very important when designing a system for selective catalytic reduction of nitrogen oxides of the diesel engine. In this study, the analysis of the test results of complex system of neutralization of the diesel engine and evaluated the possibility of measuring free ammonia nitrogen oxide sensors. Obtained by the sensor correlation of nitric oxide in presence of free ammonia with the influence of temperature. Implementing the results for the system controlling the supply of urea will simplify the structure of the system, exclude the additional oxidation catalyst (AMOX - catalyst) and make possible to use the sensor signals in the OBD.

diesel engine, exhaust, nitrogen oxides, neutralization system, urea, ammonia, hydrolysis, pyrolysis, oxidation, reduction, the catalyst

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HIGH-POWER HYDROMECHANICAL TRANSMISSIONS: PATENT-INFORMATIONAL AND COMPUTATIONAL INVESTIGATION. PART 2. GEARBOXES WITH THREE DEGREES OF FREEDOM

Algin Vladimir B., Dr. Techn. Sc., Professor Deputy Director in Science,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Bokovets Elena N. Chief of the Department of Protection of Intellectual Property, This email address is being protected from spambots. You need JavaScript enabled to view it., Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, Republic of Belarus

Kuznetsov Evgeni V., Master Techn. Sc. Design Engineer, This email address is being protected from spambots. You need JavaScript enabled to view it., Minsk Wheel Tractor Plant, Minsk, Republic of Belarus

This article is a continuation of the first part of work, published in a previous edition, containing methods of patent information and computational studies of high-power transmissions. In this part planetary gearboxes with three degrees of freedom of leading manufacturers and patentees (Allison, Caterpillar, Komatsu, General Motors and others) are observed. Directions of development of gearboxes are illustrated with the use of typical solutions. Parameters of gear sets, necessary for calculations, are estimated with the use of patent data. Speed and power calculations of gearboxes are made. For evaluation of compactness and loading new quantitative indicators are entered. Proposed comprehensive indicator of loading is based on the integral accounting major data about loading, obtained by computational analysis. Relation between compactness and loading is presented. Results of investigation of gearboxes with four and more degrees of freedom and general conclusions are planned to provide in the next part of work.

hydromechanical transmission, gearbox with three degrees of freedom, parameter estimation, speed and power calculation, loading, compactness, comprehensive evaluation of transmission

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IMPROVEMENT OF LINKAGE DRIVE PUMPING UNIT CONSTRUCTION

Popovich Vasyl Ya. Assistant of the Department of Machines Mechanics, This email address is being protected from spambots. You need JavaScript enabled to view it.

Senchishak Vasyl M. Assistant Professor of the Department of Machines Mechanics

Kharun Viktor R., Cand. Techn. Sc. Assistant Professor of the Department of Machines Mechanics, Ivano-Frankovsk National Technical University of Oil and Gas, Ivano-Frankovsk, Ukraine

By means of vector algebra, kinematics analysis algorithm of spatial six
membered linkage drive pumping unit model SK8 is developed. Authors obtain decision of system of vector equations, on the basis of which the effect of dynamic errors linkage to the position of its links is investigated. The elastic deformation of rods is detected, which is a consequence of the presence of redundant links in the mechanism. To eliminate elastic deformation of the units, design changes in the kinematic scheme of the lever mechanism are proposed.

vector, mechanism, pumping unit, hinge, block diagram, link, redundant links

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THE CHOICE OF THE RATIONAL MODE OF GEAR SHIFTING PROCESS IN MECHANICAL DUAL-CLUTCH TRANSMISSION

Poddubko Sergei N., Cand. Techn. Sc., Associate Professor, General Director, This email address is being protected from spambots. You need JavaScript enabled to view it.

Goman Arcady M., Cand. Techn. Sc., Associate Professor, Head of the Department of Dynamical Analysis and Vibration Monitoring of Vechicles, This email address is being protected from spambots. You need JavaScript enabled to view it.

Shportko Vladimir V., Junior Researcher of the Department of Dynamical Analysis and Vibration Monitoring of Vechicles, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, Republic of Belarus

Analytical researches of the gear shifting process in cars transmissions with dual clutch are carried out, on the basis of which the choice of rational gear shift laws depending on operational characteristics of the vehicle is offered.

dual clutch, mechanical transmission, gearbox, power circulation, gear shift, control principles, car, dynamic model, city type bus

• Zaitsev A.R. Issledovanie staticheskogo ravnovesija sukhogo friktsionnogo dvoinogo stseplenija [Research of the static balance of dry frictional dual clutch]. Mekhanizatsija stroitel’stva [Building mechanization], 2013, no. 1, pp. 14-19.
• Zaitsev A.R. Metodika opredelenija optimal’nykh parametrov nastroiki sistemy upravlenija sukhim friktsionnym dvoinym stsepleniem [The technique of determining of the optimal adjustment parameters of a dry frictional dual clutch control system]. Mekhanizatsija stroitel’stva [Building mechanization], 2013, no. 3, pp. 10-13.
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• Basalaev V.N., Kovalenko A.V. Issledovanie protsessa perekljuchenija peredach pod nagruzkoi i optimizatsija upravlenija friktsionnymi muftami mekhanicheskoi transmissii [Under loading gearshift process research and mechanical transmission frictions control optimization]. Mekhanika mashin, mekhanizmov i materialov [Mechanics of machines, mechanisms and materials], 2011, no. 2(15), pp. 24-32.
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