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Research of impact of the loading on endurance of the freight locomotive engines

Lebedevas S., Lebedeva G., Dailydka S., Vaičiūnas G.

Transport Problems

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2015

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T. 10, z. 4

45--55

EN

The publication reflects the research results of the rationalization of the rolling stock use of JSC LG Lithuanian railways to increase the reliability indicators of the freight diesel locomotive exploitation reliability. The comparative evaluation of the exploited freight diesel locomotive work duration, according to the technical documentation, by using comparative test results and indirect diesel reliability criteria approved in practice. An algorithm of work duration forecasting methodology has been created, as well as a programme complex of mathematic modelling. The differences of the results indicated in the experiment and modelled by computer do not exceed 5÷7%. The proposed and described methodology of the diesel locomotive exploitation load cycle dynamic indicator reduction, by the use of which the following is achieved: increase of the diesel work duration by 7÷10%, reduction of fuel consumption up to 10%, reduction of the load cycle dynamic indicators (increasing the fatigue stress of parts and units of the diesel) by 15÷20%.

RU

Статья отражает результаты исследований, связанных с рационализацией подвижного состава ОАО Литовские железные дороги для улучшения показателей надежности эксплуатации грузовых тепловозов. Сравнительная оценка длительности эксплуатационной работы грузового тепловоза в соответствии с технической документацией базируется на результатах сравнительных испытаний и косвенных критериев надежности дизелей, полученных в практике. Был предложен алгоритм прогнозирования продолжительности эксплуатационной работы, а также программный комплекс для математического моделирования. Различие результатов, полученных экспериментально и моделируемых с помощью компьютера, не превышает 5 ÷ 7%. Предложены и описаны методология снижения динамического индикатора эксплуатационного цикла нагрузки тепловоза, с помощью которого достигается следующее: увеличение продолжительности работы дизеля на 7 ÷ 10%, снижение расхода топлива до 10%, снижение динамических показателей цикла нагрузки (снижение усталостных напряжений деталей и узлов дизеля) 15 ÷ 20%.

2

Research of usage of RRME and alcohol biofuel mixture in diesel engine

Lebedevas S., Lebedeva G., Žaglinskis J.

Journal of KONES

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2012

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Vol. 19, No. 2

289-304

EN

The paper provides the results of an integrated research of the energy, environmental performance and traction indicators and the characteristics of fuel feed and performance of A41, 2F511, VALMET 320 DMG and Audi 1Z highspeed, direct-injection diesel engines when converting their operation from mineral diesel D to the fatty acid esters (RRME and RRBE) and alcohol biodiesel mixtures. The researches are carried out in cooperation of the Lithuanian and Polish partners within the framework of joint scientific projects under EUREKA international scientific program „E!4018 CAMELINA-BIOFUEL”. In the light of the new EU initiatives („White Paper” 2011), 30% optimum part of RRME bio-component in the mixture with D (B30) is validated for practical use. The characteristics of fuel supply and heat generation in a diesel cylinder are under investigation; an explanation of a significant reduction in the harmful component emission (EG) and 2 to 4% increase in the fuel efficiency in case of use of B30 and B10 biodiesels is offered. The presence of the ethanol alcohol component 9E) in D-RME-E and RME-E biofuel mixtures resulted in reduction of CO and NOx emission by 10 to 12% and EG smokiness - by 20% per each 10% increase of E part. The indicated efficiency of performance was increased by 2-2.5%. The indicators of cyclic instability did not exceed the corresponding indicators in diesel operation on D. It is established that the motor properties of tested B30 and B50 biofuels based on butanol and rapeseed oil butyl ester RBE are similar to RME biodiesels and have important advantages over them: the complete solubility of alcohol component and the possibility of B30 (D-RBE) use at ambient temperature up to -30 centigrade. The motor characteristics of the second-generation biodiesels produced from the non-food raw material (Camelina Sativa oil methyl esters) are highly competitive with and even exceed by separate indicators the similar indicators of certified RME biodiesels. It is demonstrated that the conversion of diesels, including the automobile diesels with EGR electronic system, to operation on D-RRME (RME, CSME) biodiesels does not require the change of regulation characteristics of the fuel-feed system. The test of the oxidation stability of D-RME and D-CSME biodiesels performed under operating conditions on S. Lebedevas, G. Lebedeva, J. Žaglinskis VALMET 320 DMG marine diesel proved the stability of the motor, energy, and environmental performance indicators for 7-8 months' biodiesel storage without the addition of antioxidant and for 13-14 months' storage - with the addition of Ionol BS200 antioxidant.

3

The method of simultaneous parametric analysis of the in-cylinder processes and thermal load on diesel piston units

Lebedevas S., Lebedeva G., Sławiński Z.

Journal of KONES

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2009

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Vol. 16, No. 4

247-256

EN

The paper describes the basic methodological principles and the results of development and practical application of simultaneous complex parametric analysis of the in-cylinder processes and thermal load on cylinder piston unit in diesel engines. The application of the suggested method to research and conceptualize engine design allows us to choose an optimal combination of the cylinder-piston unit parameters and diesel engine control. As a result, an admissible level of thermal stress in the most heavily loaded parts of cylinder-piston unit and low fuel consumption of diesel engines are achieved. A limited number of factors determining perfect in-cylinder processes make this method easy to visualise as well as providing it with a clear physical meaning of graphically presented results, not restricting the analysis to the design parameters of engine units. The method was practically used for upgrading high-speed diesel engines of the trademarks CHN 16.5/18.5, CHN 15/18, and CHN 15/15, to increase their power based on the average indicated pressure, and to reduce their fuel consumption and harmful environmental effects. In particular, a method implemented in diesel engines CHN 15/15 of the basic design with their power increased by 60-70%, the power of diesel CHN 16.5/18.5 was increased by 70-100%.