卷 7, 编号 1-1 (2013)
- 年: 2013
- 文章: 47
- URL: https://medbiosci.ru/2074-0530/issue/view/3761
Articles
Development and research of a high-performance fan for a liquid-cooling system of a truck turbo diesel
摘要
On the basis of performed mathematical study of fan units the authors defined the parameters of a high-performance fan of diagonal type for a liquid-cooling system of a 397 kW turbo-diesel of a heavy-duty vehicle and estimated its fuel consumption at nominal power mode.
Izvestiya MGTU MAMI. 2013;7(1-1):6-10
6-10
Structural alterations of an engine when switching to gasoline-ethanol fuels
摘要
The article examines the structural alterations in various systems of internal combustion engines with spark ignition, which are required when switching engine to gasoline-ethanol fuel with different concentrations of ethanol.
Izvestiya MGTU MAMI. 2013;7(1-1):10-14
10-14
Mathematical problems of calculating the multi-zone models of a cycle of internal combustion engine with spark ignition
摘要
The article describes the features of mathematical models of internal combustion engine cycles which do not allow to put ordinary differential equations (ODE) of these models in the Cauchy form. The authors proposed a stable algorithm of numerical integration of ODE systems that are not solved with respect to derivatives, using Hermite splines and methods of nonlinear programming.
Izvestiya MGTU MAMI. 2013;7(1-1):15-22
15-22
Use of FDK-124 coordinate photodetectors in laser analyzers of gas pollution by harmful impurities
摘要
The article considers the application of laser light sources in exhaust gas mixture analyzers of automotive internal combustion engines. The authors show functional diagram of the installation where it is possible to carry out experiments on testing and selection of lasers for use in analyzers of gases contaminated by impurities. The possibility of using the coordinate photodetectors of FDK-124 type in analyzers of gas, polluted by microparticles, is presented as well.
Izvestiya MGTU MAMI. 2013;7(1-1):22-28
22-28
Influence of parameters and conditions of rolling of elastic wheels on their power and kinematic characteristics
摘要
The article considers the effects occurring in contact of an elastic wheel with rigid base; the issues of kinematics and mechanics of rolling of elastic wheels with cylindrical and toroidal shape of a cap on a rigid base during the rectilinear and curvilinear motion, with lateral skid and without it, on rigid drums. The authors identified relationships not known earlier, influence of parameters and conditions of wheel rolling on its power and kinematic characteristics.
Izvestiya MGTU MAMI. 2013;7(1-1):28-32
28-32
Determination of camber and toe angles ratio for elastic wheels, providing the lowest rolling resistance
摘要
The authors consider issues of kinematics and mechanics of rolling of elastic wheel set with various camber and toe angles.
Izvestiya MGTU MAMI. 2013;7(1-1):32-37
32-37
Mathematical model of heat transfer in the exhaust system of gasoline engine
摘要
The authors consider theoretical processes of heat exchange in the exhaust system of gasoline engine. From the results of calculations of the mathematical model of heat transfer processes, it is concluded that a detailed analysis of the dynamics of combustion of fuels requires strict consideration of all physical processes including processes of convective heat transfer between live gas and products of combustion and structural elements of a shell.
Izvestiya MGTU MAMI. 2013;7(1-1):37-41
37-41
Computer-aided designing of turbine blades with parabolic contours
摘要
In the paper the authors study the problem of turbine blades design. For computer-aided design in Mathcad the application program was developed as an element of the CAD system. A blade is shaped by three parabolas: back side– by one parabola, and pressure side – by two parabolas prescribing the maximum thickness of the profile. The program was tested on more than 30 profiles of blades for gas turbine engines.
Izvestiya MGTU MAMI. 2013;7(1-1):41-47
41-47
Features of construction of static characteristics of independent suspensions of all-terrain vehicles by means of a spatial model
摘要
The spatial model of all-terrain vehicle was designed to obtain static characteristics of independent suspensions considering actual suspension kinematics and features of its mounting on a vehicle.
Izvestiya MGTU MAMI. 2013;7(1-1):47-52
47-52
Method of generation a torque in hybrid and combined powerplants
摘要
The paper presents theoretical study of possible ways of torque generating in hybrid and combined powerplants with possible changes of efficiency and environmental indicators.
Izvestiya MGTU MAMI. 2013;7(1-1):52-60
52-60
Estimation of efficiency of internal combustion engine in terms of quality index of system operation
摘要
The author presents the methodology of estimation of the quality of operation of internal combustion engines as a part of a complex anthropotechnical system. System’s factor of safety was calculated as well as the numerical values of quality level of the entire system and its subsystems. The conclusions are about the need of improvement of the internal combustion engines.
Izvestiya MGTU MAMI. 2013;7(1-1):60-67
60-67
Formation of diesel engine load curves by means of shutdown of operating cycles
摘要
The way of the formation of diesel engine load curves by means of shutdown of operating cycles is considered in the paper. The authors give the corresponding relations of the internal combustion engine theory and dependence plot of the number of working cylinders and the total number of engine cylinders.
Izvestiya MGTU MAMI. 2013;7(1-1):67-70
67-70
Cooling of rotary heat exchanger frame
摘要
The paper presents the results of the design study of a cooling system of rotary heat exchanger frame. The analysis of the existing frame cooling systems of heat exchangers is performed.
Izvestiya MGTU MAMI. 2013;7(1-1):70-73
70-73
Stabilization of thermal stress in tires of vehicle track rollers
摘要
The article provides a rationale method for stabilizing thermal stress in tires of vehicles track rollers by choosing the angle of suspension unit setting.
Izvestiya MGTU MAMI. 2013;7(1-1):73-78
73-78
The use of oxygenates in motor fuels for internal combustion engines with spark ignition
摘要
The article considers the most promising oxygenates used in motor fuels to improve the energy and environmental performance of internal combustion engine with spark ignition.
Izvestiya MGTU MAMI. 2013;7(1-1):78-82
78-82
Non-contact gesture control systems as a basis for building of H2C-interfaces in automatic control systems
摘要
The authors consider the problems of creation and operation of human oriented control systems that use contactless gestural interfaces. There is an analysis of existing approaches done and assumptions about the most effective approaches to the construction of such systems.
Izvestiya MGTU MAMI. 2013;7(1-1):82-87
82-87
Ways to improve safety of vehicles using the parameters of angular orientation of steering wheels
摘要
In the paper the authors put forward the concept of increasing active safety of automobiles by mean of forced speed reduction in the curvilinear motion taking into account the angles of the axes of steering wheels and the roll of unsprung masses. The authors provide the proof of the concept by the criteria of maneuver maximum speed with limitation by roll-over resistance.
Izvestiya MGTU MAMI. 2013;7(1-1):88-91
88-91
Control of air pressure in the tires of cars
摘要
In the paper the authors put forward the concept of increasing active safety of vehicles by controlling the air pressure in the tires of cars. The authors consider that the control of the air pressure in the tires is necessary because it directly affects the performance in handling and stability, especially automobiles.
Izvestiya MGTU MAMI. 2013;7(1-1):91-96
91-96
Hydrostatic drive in transmissions of special self-propelled vehicles
摘要
The authors analyzed the working principle of hydrostatic transmission with adjustable hydraulic machines. A method for determining the range of variation of the transmission ratio of the controlled hydraulic machines with power loss is presented as well. There are mechanical properties of hydrostatic transmission with adjustable hydraulic machines with sequential mode acceleration of its driven member. There is considered full flow transmission of a utility tractor "BIMA-300" (France), and its evaluation is given.
Izvestiya MGTU MAMI. 2013;7(1-1):96-104
96-104
The method of selection of the main elements of the hydrostatic transmission wheeled machine
摘要
The article presents a method of calculation that is proposed for use when selecting the main elements hydrostatic transmission of drive wheels self-propelled machines.
Izvestiya MGTU MAMI. 2013;7(1-1):104-109
104-109
Improving of starting characteristics of petrol-ethanol internal combustion engines during cold start and warm-up
摘要
The article deals with methods to improve the starting characteristics of internal combustion engines with spark ignition running on petrol-ethanol fuels with different concentrations of ethanol.
Izvestiya MGTU MAMI. 2013;7(1-1):109-112
109-112
Study of oscillations of the automobile power plant
摘要
The article describes an estimated model of a vehicle powerplant. This model takes into account the fluctuations of the power unit along and around the three axes and considers the impact of the transmission to the whole picture of the oscillations of the power unit. The mathematical description of the computational model of the power unit is presented on the example of a small class car.
Izvestiya MGTU MAMI. 2013;7(1-1):112-114
112-114
Assessment of impact of reactive units to oscillations of an automobile power plant
摘要
+7 (495) 223-05-23, eae@list.ru The article summarizes the estimated model of a vehicle powerplant. This model takes into account the oscillations of the power unit along and around the three axes and considers impact of the transmission to the whole picture of the oscillations of the power unit. The mathematical description of the computational model of the power unit is presented on the example of a small class car.
Izvestiya MGTU MAMI. 2013;7(1-1):114-117
114-117
Engineering materials for pistons of internal combustion engines
摘要
This article provides an overview of modern construction materials for production of pistons for internal combustion engines including composites. A comparison of mechanical and thermal properties of these materials is presented. It is reported on the experience of production of pistons made from carbon composite in Russia.
Izvestiya MGTU MAMI. 2013;7(1-1):118-125
118-125
Engineering method of calculation of gasdynamic foil bearings of turbocompressors
摘要
In the article there is considered the engineering method of calculation of gasdynamic foil bearings. There are executed calculations according with this method and there is executed the comparison of results which were received by other authors.
Izvestiya MGTU MAMI. 2013;7(1-1):126-132
126-132
Endurance testing of tractor friction clutches
摘要
The authors offer the technique of forced life testing of tractor friction clutches imitating their mode of loading in actual operation. The forcing of endurance bench-testing of friction clutches according to the proposed method compared to the common performance is increased by 6 ... 10 times depending on the design of friction pairs, materials and conditions of loading operation.
Izvestiya MGTU MAMI. 2013;7(1-1):133-141
133-141
Determination of rational gear ratio of inter-wheel differential while upgrading the transmission of multi-purpose vehicle
摘要
The paper proposes a method of determination of rational gear ratio of inter-wheel differential of all-wheel drive vehicles and evaluation of the effectiveness of its use to improve the performance of vehicles.
Izvestiya MGTU MAMI. 2013;7(1-1):141-145
141-145
Segmentation of the market for agricultural tractors for its analysis and forecasting
摘要
The authors offer a method of segmentation of the market for agricultural tractors according to their pulling force and power, allowing more effectively analyze and predict the market comparing to conventional methods of segmentation according to engine power of a tractor.
Izvestiya MGTU MAMI. 2013;7(1-1):145-153
145-153
LED lighting of automobiles and tractors
摘要
The article considers the possibilities of application of high-brightness semiconductor light-emitting diodes in lighting systems of automobiles and tractors. There are shown the main parameters of LEDs and circuit diagrams of their connection.
Izvestiya MGTU MAMI. 2013;7(1-1):153-158
153-158
Aerodynamic drag of radiator in unsteady air flow
摘要
Nonuniform distribution of velocity of cooling air over the front surface of a radiator increases its drag. The paper analyzes the factors affecting the increase of aerodynamic drag under the influence of unsteady air flow. The degree of drag change depends on aerodynamic properties of radiator core, namely, the curvature of the graph of aerodynamic characteristics of a radiator and nonuniform air velocity field over the front of a radiator. In actual use, increase of drag of a radiator can be more than 20%.
Izvestiya MGTU MAMI. 2013;7(1-1):158-162
158-162
Multilevel integrated quality management system for electrical equipment at automobile lifecycle stages
摘要
The paper provides a description of a multilevel quality management system at stages of lifecycle on the example of electrical equipment of an automobile.
Izvestiya MGTU MAMI. 2013;7(1-1):162-166
162-166
Simulating management system as a tool to control quality stability of production of electromechanical transducers
摘要
The paper provides a description of the simulation management system for control of manufacturing process of electromechanical transducers, designed for stabilizing the reliability of production.
Izvestiya MGTU MAMI. 2013;7(1-1):166-171
166-171
Apparatus for production of methyl ether from vegetable oil
摘要
This article is devoted to the study of existing methods and systems for production methyl ethers of fatty acids from rapeseed oil. Analyses and comparison are also mentioned. The description of production plant for production of methyl ethers from vegetable oil is given in the article. The authors describe its principle of operation taking into account rapeseed oil and production of methyl ethers from rapeseed oil. The advantages and disadvantages of each method and plant are indicated as well.
Izvestiya MGTU MAMI. 2013;7(1-1):171-179
171-179
Analysis of kinematic and power parameters of rolling wheel propulsor
摘要
The authors consider the relationship between kinematic parameters and energy properties of rolling wheel propulsor. The authors solve the problem of the existence of solutions for three-dimensional system "rolling wheel propulsor - bearing surface" when forming a bearing surface. The research also establishes the relationship between the speed of motion of the system and the nature of vibrations affecting ride comfort of a vehicle.
Izvestiya MGTU MAMI. 2013;7(1-1):179-184
179-184
Design and manufacture of test bench for simulation of movement of a vehicle driven by electric motor
摘要
The article describes the stages of the project development, design and technological solutions in the production of units of the test bench for simulation of movement of a vehicle driven by electric motor.
Izvestiya MGTU MAMI. 2013;7(1-1):184-191
184-191
Device for recording microprofiles of an automobile road
摘要
The article describes schematic diagrams of devices used to record microprofiles of automobile roads, their advantages and disadvantages. The authors propose construction diagram, free from most of the disadvantages.
Izvestiya MGTU MAMI. 2013;7(1-1):191-195
191-195
Transients in hydraulic drive of a fan for engine cooling system of a vehicle
摘要
The article describes the mathematical model and the calculation of the transients in designed hydraulic drive of a vehicle cooling system. There is presented the verification of the mathematical model using results of test of hydraulic drive specially built for designed system. The author carried out the comparison of the calculated pressure transients with other ones obtained during the test of prototype of hydraulic drive for cooling of vehicle engine.
Izvestiya MGTU MAMI. 2013;7(1-1):195-204
195-204
Generation of hydrogen containing gas on board a vehicle
摘要
The strategy of improving the environmental quality of engines using hydrogen synthesis gas as means of chemical activation of workflow is discussed in the paper. The technologies for generating synthesis gas aboard a vehicle are also considered. The authors present the description of the experimental onboard system for producing hydrogen synthesis gas by thermochemical conversion of gasoline. The article contains the materials of its testing on a real car.
Izvestiya MGTU MAMI. 2013;7(1-1):204-212
204-212
Use of biofuel compositions as an alternative to improve environmental and energy safety in transport
摘要
The paper considers problems of energy supply and improving of environmental safety in transport, as well as one of the alternatives of their total solution based on the use of binary biohydrocarbon fuels. The authors considered basic physical and chemical properties of some fuel compositions and their impact on the performance of an engine. The results of testing of engines operating on two-component fuels are presented in the article.
Izvestiya MGTU MAMI. 2013;7(1-1):212-217
212-217
Simulation of random microprofile of road surface by the method of shaping filter
摘要
The article considers the simulation of random microprofile of road surface by the method of shaping filter. Differential equations of the shaping filter for different correlation functions are obtained.
Izvestiya MGTU MAMI. 2013;7(1-1):218-224
218-224
Simulation of microprofile of road by wheel track
摘要
The article considers the simulation of random microprofile of road surface on various wheel tracks with help of the method of shaping filter. Differential equations of the shaping filter for an exponential correlation function are obtained.
Izvestiya MGTU MAMI. 2013;7(1-1):225-229
225-229
General propositions for the integration of power supply system in a multiplex communication system of a vehicle
摘要
The article describes the basic principles for integrating power supply system in a multiplex system of a vehicle. Currently, the stage of integrated systems with saturation function in every particular system transforms to the stage of the information technology with integration of different “intelligent” systems in the information environment of a vehicle. Combined sharing of information from sensors creates prerequisites to the distribution of intelligence in the various systems of electrical equipment, in other words, the ability of systems to make decisions on corresponding hierarchical level.
Izvestiya MGTU MAMI. 2013;7(1-1):230-232
230-232
The use of combined power units in vehicles and environmental safety
摘要
This article presents the analysis of trends of development of modern automobiles which shows that the most promising direction in solving energy and environmental problems in transport is the use of combined power units.
Izvestiya MGTU MAMI. 2013;7(1-1):232-239
232-239
Self-exciting oscillations in clutches of automobiles and tractors
摘要
The authors present the experimental results proving that in the real exploitation of a vehicle or a tractor self-exciting oscillations do not occur in friction pairs of friction clutch. This refers to friction clutches with asbestos, asbestos-free polymer and sintered powder friction pads.
Izvestiya MGTU MAMI. 2013;7(1-1):239-242
239-242
Estimation of parameters of clutch slipping for their various installation in tractor gearboxes when shifting without torque interruption
摘要
The article describes the method of calculation of the work and time of clutch slipping during gear shifting without torque interruption for any variations in the relative position of friction-clutch coupling in a tractor gearbox.
Izvestiya MGTU MAMI. 2013;7(1-1):242-248
242-248
Electro-hydraulic devices for control of transmission frictional mechanisms
摘要
Electrohydraulic devices are widely applied for control of transmission frictional mechanisms containing multi-plate wet clutches or brakes. Depending on function and conditions of engaging there are devices of relay or proportional operation. The last one use electromagnets of proportional action where attractive force between rotor and stator depends only on current magnitude in a winding. Such devices can be direct action devices or servo-action ones.
Izvestiya MGTU MAMI. 2013;7(1-1):248-253
248-253
Structure and dynamic of control of tractor electric drive
摘要
The authors consider the characteristics of operation regimes and control of tractors with electric drives taking into account dynamic properties of controlled objects and requirements to its quality. Objects are the traction drive, including a turn of a tracked tractor, drives of PTO and hydraulic system pumps, and the “engine-generator” system.
Izvestiya MGTU MAMI. 2013;7(1-1):254-262
254-262