Influence of Biodiesel on Performance of Machine-Tractor Units

Nadykto, Volodymyr; Findura, Pavol; Kiurchev, Volodymyr; Orel, Oleksander

doi:10.2478/ata-2022-0002

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…At a constant value of the parameter m, the density of effective centers will increase sharply, followed by its monotonous decrease, while in a real engine the combustion process may already have time to complete by this time and, accordingly, the concentration of active centers will fall to a minimum. In real conditions, the indicator of the nature of combustion changes during the combustion process m is not a constant value, which is associated with a change in the rate of combustion and the limiting role of the physical processes of evaporation and diffusion [17][18][19][20][21].…”

Section: Methodsmentioning

confidence: 99%

Investigation of the combustion process in a dual-fuel engine

Lopatin

2024

J. Phys.: Conf. Ser.

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Modeling of in-cylinder processes occurring in a dual-fuel engine is necessary to obtain the ignition delay period as a function of the angle of rotation of the crankshaft and the subsequent calculation of its effective and environmental indicators. There is a need to identify the theoretical dependence of the fuel combustion process on the parameters that determine the operating modes of a dual-fuel engine, which leads to the need to create a mathematical model that allows the most accurate description of the combustion process, taking into account the maximum possible number of factors. The paper considers the optimization of the parameters of the workflow and the prediction of the performance of the projected and existing dual-fuel engines.

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Section: Methodsmentioning

confidence: 99%

Investigation of the combustion process in a dual-fuel engine

Lopatin

2024

J. Phys.: Conf. Ser.

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“…The further algorithm of theoretical studies is as follows: the variant of the unit whose AFC and PFC are closest to perfect (ideal) is preferable. When working out the control action, the perfect AFC is 1, and PFC is 0 (Popovich and Kovalchuk, 2007;Nadykto et al, 2022).…”

Section: Fig 2 Harvesting Unit Diagram With the Fixed Junction Of A T...mentioning

confidence: 99%

Justification of the Unit Design Diagram for Mowing Agricultural Crops Simultaneously with Their Stuble Chopping

Findura,

Nadykto,

Kyurchev

et al. 2024

Acta Technologica Agriculturae

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The two-phase method is quite widespread when harvesting grain crops and forage grasses. For its implementation, farmers prefer harvesting units with a front-mounted header. The main disadvantage of such units is that after their passage in the space between the swaths of mown crops, open soil falls under the direct influence of sunlight. Subsequently, this leads to an intensive loss of its moisture. A harvesting unit has been designed to eliminate this shortcoming, consisting of a tractor with a front harvester and a soil-cultivating machine (disc harrow) mounted at the rear. The latter chops stubble and soil in the space between the swaths of the mowed crop, contributing to soil moisture conservation. In the diagram plan, the tillage machine can have a swivel or fixed conjunction with the tractor in a horizontal plane. A mathematical model of the harvesting unit plane-parallel movement in the horizontal plane has been designed to choose these conjunctions better. In the study, it is used to analyze the corresponding amplitude (AFC) and phase (PFC) frequency characteristics of a dynamic system when it is working out a control action in the form of the sighting point transverse shift. As a mathematical modeling result, it was found that the fixed conjunction of a tillage machine with a tractor is preferable. In this case, the natural AFC practically approaches the perfect one for servo dynamical systems. The correlation degree between the tractor‘s steered wheels‘ rotation and heading angles increases by almost 37%. As a result, this leads to a significant decrease in this parameter variance fluctuations, which contributes to an increase in the harvesting unit controllability movement as a whole.

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Methodology for experimental study of soil microrelief on ruts in bridge farming

Beloev¹

2022

Tehnìka ta energetika

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The study of issues related to the study of the state of the soil on the surface of the most constant technological track is relevant, since the movement of the running wheels along narrow tracks determines the traction and coupling properties of machine-tractor units, their vibrations, the stability of movement and the controllability of movement. The рurpose of this study was to increase the efficiency of the process of profiling microroughnesses of the soil surface located in areas that form a track along which the running wheels of machine-tractor units will move, by substantiating a new scheme of an automated profilograph and developing methods for its use. For this study, modern methods of experimental research based on IT technologies were used. In particular, an automated complex has been developed for measuring and evaluating the microprofile of soil surface irregularities on the very track of the tramline. The results of the experimental studies in this matter showed that the standard deviation of the soil surface irregularities reaches ±0.84 cm. This gives reason to consider the harmonic components of these functions as damped, having normalized correlation functions. The graphs constructed using PC showed that most of the dispersions of soil surface irregularities on the ruts themselves are concentrated in the range of 0…0.3 sm−1. It was established that the generator of the formation of irregularities in the longitudinal profile of traces of a permanent technological track is the parameters of the treads of the wheels of the machines moving along it. The obtained results of the study can be used in the selection of protectors of pneumatic tires of the running wheels of machine-tractor units moving on two tracks

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Influence of Biodiesel on Performance of Machine-Tractor Units

Cited by 5 publications

References 13 publications

Investigation of the combustion process in a dual-fuel engine

Investigation of the combustion process in a dual-fuel engine

Justification of the Unit Design Diagram for Mowing Agricultural Crops Simultaneously with Their Stuble Chopping

Methodology for experimental study of soil microrelief on ruts in bridge farming

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