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A. A. Tret'yakov
A. A. Tret'yakov
Military Academy of Logistics
Military Academy of Logistics
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Articles

Electromechanics and mechanical engineering
  • Date submitted
    2016-10-12
  • Date published
    2015-04-01

Method of diagnostics of diesel engines in timing of the operating cycle

To maintain diesel engines in working condition there have been developed methods of diagnosing local crankshaft rotation developed by each cylinder. Inoperative cylinder has an angular velocity of rotation that does not respond the technical conditions. The measuring and computing complex consisting of personal computers, diagnostic complex «MotoDoc III», software and a set of sensors was developed for measuring. The results of the measurement and analysis of time parameters are displayed on the monitor screen. The software facilitates the recording of a signal, its processing and storage, as well as the ability to display the results. The method of diagnosis involves a number of stages: preparation of a diesel engine and equipment, the holding of general and local diagnosis, diagnosing. Thus, it appears possible to carry out condition monitoring of diesel engines by CIP method.

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A. S. Afanas'ev, A. A. Tret'yakova (2015) Method of diagnostics of diesel engines in timing of the operating cycle. Journal of Mining Institute. Vol 214. p. 51.
Electromechanics and mechanical engineering
  • Date submitted
    2016-12-29
  • Date published
    2016-06-01

Simulation of diesel engine energy conversion processes

In order to keep diesel engines in good working order the troubleshooting methods shall be improved. For their further improvement by parameters of associated processes a need has arisen to develop a diesel engine troubleshooting method based on time parameters of operating cycle. For such method to be developed a computational experiment involving simulation of diesel engine energy conversion processes has been carried out. The simulation was based on the basic mathematical model of reciprocating internal combustion engines, representing a closed system of equations and relationships. The said model has been supplemented with the engine torque dynamics taking into account the current values of in-cylinder processes with different amounts of fuel injected, including zero feed. The torque values obtained by the in-cylinder pressure conversion does not account for mechanical losses, which is why the base simulation program has been supplemented with calculations for the friction and pumping forces. In order to determine the indicator diagram of idle cylinder a transition to zero fuel feed mode and exclusion of the combustion process from calculation have been provisioned.

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A. S. Afanas'ev, A. A. Tret'yakov (2016) Simulation of diesel engine energy conversion processes. Journal of Mining Institute. Vol 222. p. 839. DOI: 10.18454/pmi.2016.6.839