Determination of statistical data of conditional probabilities of the technical condition of internal combustion engines when compiling the Bayes diagnostic table

Khaliullin, Farit; Aladashvili, Joseph K.; Nurmiev, Azat; Pikmullin, Gennady V.; Sinitsky, Stanislav A.

doi:10.1088/1757-899x/635/1/012017

Cited by 7 publications

(5 citation statements)

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“…For the diagnosis of ICE malfunctions, a method based on the application of the Bayes algorithm is proposed, with the selected diagnostic parameters, the basics of which are proposed in the works [22][23][24][25]. In them, the internal combustion engine is considered as a dynamic system with stationary and deterministic characteristics, which allows to use identifying methods of dynamic systems.…”

Section: Offered Solutionmentioning

confidence: 99%

“…To determine the range of changes in indicators from a good to a bad value, information on the correspondence of these data for engines with zero and maximum operating time is required [24].These characteristics are determined according to regulatory and technical documents or they can be obtained in bench tests of engines with different technical conditions, and they are used to determine the boundary conditions during diagnostics: as a result, there are three ranges for each diagnostic parameter: good ( 1 ), satisfactory ( 2 ) and poor ( 3 ) (Table 1).…”

Section: Fig 2 Algorithm Of Non-disassembly Diagnostics Of Icementioning

confidence: 99%

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Method of non-disassembly diagnostics of automotive engines based on pulse functions of their systems

Khaliullin

Matyashin

Martyshev

et al. 2021

20th International Scientific Conference Engineering for Rural Development Proceedings

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The necessity to determine the technical condition of automotive internal combustion engines arises when their power, economic and environmental indicators deteriorate, as well as before performing the next major repair. Currently, disassembly and non-disassembly methods are used for this purpose. Disassembly methods, although they are the most reliable, are more labor-intensive and require the removal of the engine from the car, the availability of space and equipment for its disassembly. And non-disassembly methods have a low labor intensity, they practically do not require removal of the engine, while providing different reliability of the diagnosis depending on the method used. A method of non-disassembly diagnostics of automotive engines based on the pulse functions of their systems is proposed. As diagnostic parameters here are offered the pulse function of changes in the fuel and air supply of the engine at known values of compression in the cylinders. At the same time, the experience of operating automotive engines shows that the pulse function is a function of the current technical condition of the engine. By using the generalized Bayes formula for determining conditional probabilities, it is possible to determine the probability of failure of engine systems and the current technical condition. The undoubted advantage of the proposed method is its trainability, i.e. with an increase in the statistical data of the diagnosed engines, the reliability of the established diagnosis increases. The offered method will be useful for engineers and technicians involved in the maintenance of internal combustion engines for practical implementation.

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Section: Offered Solutionmentioning

confidence: 99%

Section: Fig 2 Algorithm Of Non-disassembly Diagnostics Of Icementioning

confidence: 99%

Method of non-disassembly diagnostics of automotive engines based on pulse functions of their systems

Khaliullin

Matyashin

Martyshev

et al. 2021

20th International Scientific Conference Engineering for Rural Development Proceedings

View full text Add to dashboard Cite

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“…Internal factors include the technological and structural imbalance of the engine and various technical conditions of its cylinders, and external factors include variable operating conditions of machine-tractor units [3]. All this leads to the appearance of vibration and vibrations of the engine framework, which, in turn, leads to a decrease in efficiency, to loss of power and to the appearance of additional variable loads on parts and assemblies, which ultimately reduces their life [4]. To combat this phenomenon, the parameters of the supports of power plants are selected with the possibility of neutralizing them.…”

Section: Introductionmentioning

confidence: 99%

Adaptive support for power units of machine-tractor unit

Egorov

Khaliullin

Khaliullina

et al. 2020

19th International Scientific Conference Engineering for Rural Development Proceedings

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Under operating conditions, the power plant of a machine-tractor unit experiences changes in a wide range of changes in speed and load conditions. The vibrations arising from this, in addition to discomfort and additional loads on the components and mechanisms of the power plant, also cause excessive fuel consumption and power loss. Reducing the negative impact of vibration on effective performance of a power plant is proposed by creating supports with adjustable characteristics. The stiffness and damping coefficients were selected as the determined parameters. For tractor power plants, taking into account their layouts and design features, a design scheme with two attachment points in front with vertical movement and one hinge point at the rear was selected. As disturbing moments, we consider both the internal imbalance of the power plant itself and the external effects of the variable resistance moment and the shock of the supports themselves. Changes in the stiffness and damping coefficients of the supports used make it possible to reduce the oscillation amplitudes of the power plant under variable operating conditions, which will improve its utilization rates.

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“…To reduce the negative impact of vibrations and oscillations of the engine frame on operation of the machine-tractor unit, it is necessary to select parameters of supports of power plants so that they could absorb the energy of these oscillations with maximum efficiency [11].…”

Section: Introductionmentioning

confidence: 99%

Results of engineless studies of power plant supports for machine-tractor units operation

et al. 2020

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When using a machine-tractor unit, external conditions of its operation change in a wide range. It results in frequent changes in the parameters of speed and load modes of its power plant. Resulting vibrations and oscillations in addition to discomfort and excessive loads on components and mechanisms of the power plant also cause fuel overspending and power losses. To reduce negative vibration impact on effective performance of the power plant creation of supports with adjustable characteristics is suggested. Both internal unbalance of the power plant itself and external influence of variable moment of resistance and impulses of supports themselves are considered perturbing moments. Changes in rigidity and damping coefficients of relevant supports can reduce the amplitude of oscillations of the power plant in variable operating modes, which will improve its utilization indicators.

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Determination of statistical data of conditional probabilities of the technical condition of internal combustion engines when compiling the Bayes diagnostic table

Cited by 7 publications

References 0 publications

Method of non-disassembly diagnostics of automotive engines based on pulse functions of their systems

Method of non-disassembly diagnostics of automotive engines based on pulse functions of their systems

Adaptive support for power units of machine-tractor unit

Results of engineless studies of power plant supports for machine-tractor units operation

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