Wyniki wyszukiwania - BazTech

1

Thermodynamic analysis of the conrod-free engine

Kolesnikova T., Sakno O., Velmagina N., Lysyl O.

Transport Problems

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2018

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T. 13, z. 3

29--39

EN

The paper considers the problems related with the thermodynamic analysis of the conrod-free engine. A mathematical model of the intake system of the conrod-free engine is proposed, which takes into account the kinematics of the slider-crank mechanism. The computational model of the intake system of the engine with the slidercrank mechanism is presented. The model allowed determining dependencies of the mixture temperature in the intake pipeline on the rotation frequency of crankshaft and on the angle of opening of the throttle gate. The total pressure losses in the engine intake system are determined taking into account the kinematics of the slider-crank mechanism. The mathematical model of the intake system of engine allows evaluating the measures aimed at optimizing the engine design and increasing its fuel efficiency.

2

Mathematical model of four-stroke combustion engine working process

Ślęzak M., Jankowski A., Wojciechowski A.

Journal of KONES

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2007

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Vol. 14, No. 3

587-595

EN

By defining the fluid's thermodynamic properties, the cycle can be simplified using various assumptions. A lot of models of the combustion engine process were developed that including the thermodynamics, turbulence, and chemical kinetics to predict thermodynamic parameters of the engines. Mathematical model the working process occurring in the cylinder of the four-stroke piston-combustion engine is an object of the paper. The following assumptions consisting in that thermodynamics system is an open thermodynamical system, in accepted model were taken into account. Generalised mathematical model of the working process in the cylinder of the piston-four-stroke combustion engine was worked out. Dependences describing instantaneous volume of the working charge in the cylinder, equation of the balance of the of the working charge quantity in the cylinder and state equation of the working charge in the cylinder were considered at formulating of assumptions. Values of coefficients for each component processes of working cycle with taking into consideration of the dependence concerning the compression process , the combustion process, and expansion process after finishing of the combustion process were an object of worked out mathematical model. For nonstationary processes formulating working cycle of the engine realized during openings of valves (the open system), the quantity and composition of the working charge in the cylinder, its specific heat and temperature are variable. The temperature difference between the working charge and walls temperature of borderering the space of the cylinder was taken into account, too. Generalized mathematical model of the working process in the cylinder of the piston- four-stroke combustion engine applying for the theoretical analysis of the working process in the combustion engine, as well as for working out of experimental results was elaborated.

3

Wykorzystanie metod komputerowych do modelowania i symulacji wybranych procesów roboczych sieczkarni

Siarkowski Z., Szczepański A.

Inżynieria Rolnicza

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2005

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R. 9, nr 8

351--358

PL

Przedstawiono komputerowy program projektowania elementów roboczych sieczkarni napisany w języku Delphi 7. Przedstawiono fragment przykładu praktycznego wykorzystania programu podczas analizy i wstępnego projektowania zespołów roboczych maszyny.

EN

Paper described the computer programme written under Delphi7 language, to designing selected working elements in a forage harvester (field chopper). An example of practical applying the programme to analysis and preliminary designing of working assemblies of the machine, was given.

4

Transport zwierząt na tle wymagań Unii Europejskiej

Marczuk A.

Inżynieria Rolnicza

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2005

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R. 9, nr 8

219--227

PL

Przedstawiono wymagania Unii Europejskiej dotyczące transportu zwierząt żywych. Zastosowanie tych wymagań zobrazowano na przykładzie skupu żywca przez zakłady mięsne „Dolina Łąk” w Małaszewiczach. Przedstawiono przykład optymalizacji organizacji transportu surowca do tych zakładów.

EN

The software for designing the working parts of a cutter written in Delphi 7 language was presented in paper. A fragment of practical utilization of the software during analysis and preliminary designing the working parts of the device was described. The software may be used at didactic process.