Wyniki wyszukiwania - BazTech

1

Statistic of fuel consumption in test and in natural operation of vehicles

Sitnik L. J.

Combustion Engines

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2017

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R. 56, nr 4

239--244

EN

The lowering of carbon dioxide emission is world pursuit which is written in international agreement. It concerns all economy sections, especially motorization. In this last case the lowering is essential, since almost all fuel used for powering vehicles comes from nonrenewable resources. Using these fuels means a one-way carbon motion from underground lode to earth atmosphere. This process has to be immediately stopped. For several years there have been taken actions in this direction. There are both legislative and technical actions. However, the reports which were published in 2016 shows that despite the efforts and engagement of considerable means, the effects are mediocre. There has been noticed, that, though the lowering of carbon dioxide emission determined in bench tests has been attained, it is impossible to notice this progress in natural operation of vehicles. The causes of such a state are sought mainly in incompatibility of test conditions to the real operation of vehicles conditions. Assuming that the carbon dioxide emission is (quasi) directly proportional to fuel consumption, in the article there has been proposed the method of solving the problem of removing divergence between test and operational data. There has been suggested the different attitude to bench data analysis and implementation of new calculative procedures in a way to reach the correlation between the test and operating fuel consumption.

2

Comparing the performance of diesel locomotives for passenger transportation

Vaiciunas G., Lingaitis L. P.

Transport Problems

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2008

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T. 3, z. 1

45-50

EN

Railway transport usually employed for passenger transportation embraces passenger locomotives, diesel trainsets and electric trains as well as railcars, diesel or electric trains are mostly used on suburban routes, while passenger or electric locomotives haul the carriages on interurban routes.

3

Ways to corrections expensive economics work of engine of heavy loaded truck

Mysłowski J.

Journal of KONES

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2007

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Vol. 14, No. 3

437-441

EN

On example of Volvo car engine we shows that without break we try to search method of decrease fuel consumptions. With the aid simulation research we show constant progress in this domain. Producers don't want to shows results new research and possible failures. Ultimate verification is genuine exploitation of vehicle in conditions of big traffic, method of simulation research of fuel consumptions by these engines give us way to fast effecting of estimate of effect of exploitation. Assumption at working out of the method was possibility of the determination of the specific fuel consumption with accuracy plus or minus 5 %, so as it is required from producers of engines in relation to of rated power. Used method makes possible the realization of the performance of the specific fuel consumption with accuracy of 2,12 %, whereat this result refers to modern diesel engines with turbocharging and with the cooling of the air supercharging of such firms as Volvo, Scania, MAN, IVECO, Mercedes and DAF. In calculations the Leidemann equation has been was applied. The paper is illustrated calculations of the specific fuel consumption reference for Volvo D6B 180/220/250 and Volvo D 12D engines.

PL

Na przykładzie silników samochodów firmy Volvo wykazano jak bez przerwy trwają poszukiwania nad zmniejszeniem zużycia paliwa tych silników. Za pomocą badań symulacyjnych wykazano stały postęp w tej dziedzinie, mimo że producenci niechętnie przedstawiają wyniki najnowszych badań oraz ewentualnie niepowodzenia, które towarzyszą wspomnianym poszukiwaniom. Ostateczną weryfikacją uzyskanych rezultatów jest eksploatacja pojazdów napędzanych nową generacją silników w warunkach wzmożonego ruchu drogowego, a metody symulacyjne określania zużycia paliwa przez wspomniane silniki pozwalają na szybkie i skuteczne dokonanie oceny efektów eksploatacyjnych. Założeniem przy opracowywaniu metody była możliwość wyznaczenia jednostkowego zużycia paliwa z dokładnością plus minus 5%, tak jak to wymagane jest od producentów silników w stosunku do mocy znamionowej. Zastosowana metoda umożliwia wykonanie charakterystyki jednostkowego zużycia paliwa z dokładnością 2,12 %, przy czym wynik ten odnosi się do nowoczesnych silników wysokoprężnych z turbodoładowaniem i chłodzeniem powietrza doładowującego takich firm, jak Volvo, Scania, MAN, IVECO, Mercedes i DAF. W obliczeniach wzór Leidemanna został wykorzystany. Artykuł jest ilustrowany obliczeniami jednostkowego zużycia paliwa odniesieniu do silników Volvo D6B 180/220/250 oraz Volvo D 12D.