Fuel consumption of a high-capacity transport (HCT) vehicle combination for industrial roundwood hauling: a case study of laden timber truck combinations in Finland

Kärhä, Kalle; Kortelainen, Emma; Karjalainen, Antti; Haavikko, Hanna; Palander, Teijo

doi:10.1080/14942119.2022.2163871

Cited by 6 publications

(3 citation statements)

References 25 publications

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“…Лесовозный автопоезд, массой 92 тонны имел на 8-11 % меньший расход топлива, чем лесовозный автопоезд, массой 76 тонн при расстоянии вывозки лесоматериалов от 100 до 300 км. Рекомендовано с целью достижения большей экономии топлива и более высоких экологических показателей увеличить количество используемых для вывозки лесоматериалов лесовозных автопоездов, массой 92 тонны [8]. Sahar Andini в своей работе исследовал влияние различных факторов на эффективность функционирования лесовозных автопоездов.…”

Section: технологии машины и оборудованиеunclassified

“…Это подтверждается результатами опубликованных научных работ многих отечественных и зарубежных авторов. Среди ----------------------------------------------------------------Лесотехнический журнал 4/2023 95 зарубежных авторов необходимо выделить работы следующих ученых [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. В статье Matijosius J. и др.…”

Section: Introductionunclassified

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The simulation modeling of the operation of a recuperative pneumohydraulic drawbar of a road train coupling device with a self-pulling function

Nikonov,

Posmetev,

Siz'min

et al. 2024

Forestry Engineering Journal

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Based on the conducted exploratory research, the most significant factors were identified on which the change in transport costs spent by logging enterprises on the process of delivering timber to consumers by logging trucks depends. To reduce such costs, a promising design of the drawbar of the coupling device of a timber road train has been proposed, providing the effect of self-pulling of the road train, generating and storing the energy of the working fluid, with its subsequent use in technological hydraulic equipment. To simulate the movement of a timber road train equipped with the proposed drawbar of the coupling device and the operation of the drawbar separately in the modes of self-pulling, recovery and damping of dynamic loads, two computer programs have been developed. It has been established that with an increase in the depth of irregularities, self-pulling of a timber road train becomes more difficult, which leads to a deterioration in the efficiency of the self-pulling process. However, with an average depth of unevenness of the supporting surface of less than 0.3 m, the efficiency indicators of the self-retracting process are acceptable values: the self-retracting speed is more than 0.22 m/s, the amount of displacement per extension-reduction cycle of the drawbar of the coupling device is less than 0.12 m, consumed by the pneumohydraulic drawbar of the coupling device power less than 1.9 kW. Under very difficult road conditions – the average depth of irregularities is from 0.3 to 0.5 m – the self-pulling of the timber road train occurs, but the efficiency indicators decrease: the self-pulling speed decreases to 0.16 m/s, the movement increases to 0.17 m, power consumption increases to 3.1 kW. It was revealed that when the coefficient of viscous friction of the wheels of a logging road train against the supporting surface of a logging road changes over a wide range, the recuperative pneumohydraulic drawbar of the coupling device provides a fairly effective self-pulling with a self-pulling speed from 0.17 to 2.3 m/s, a displacement (rollback) value from 0.09 to 0.16 m, power consumption from 1.5 to 2.2 kW.

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Section: технологии машины и оборудованиеunclassified

Section: Introductionunclassified

The simulation modeling of the operation of a recuperative pneumohydraulic drawbar of a road train coupling device with a self-pulling function

Nikonov,

Posmetev,

Siz'min

et al. 2024

Forestry Engineering Journal

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“…In the international literature, these vehicles are generally called LHVs . The use of HCVs is aimed at increasing the transportation capacity, i.e., payload, therefore lowering fuel consumption and increasing energy efficiency , Lahti 2021, Kärhä et al 2023. A general goal of the forest industry is also to minimize transport unit costs.…”

Section: Introductionmentioning

confidence: 99%

Impacts of using larger and heavier vehicles on operations and profitability of timber transportation: The case of Finnish operating environment

Palander,

Viitamäki,

Borz

2023

AFR

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This study was set up to find out how Finnish timber transport entrepreneurs perceive their operating environment in terms of using larger and heavier vehicles (LHVs and HCVs), with the main aim of providing guidance for developing sustainable policies that would improve timber transportation. A total of 100 entrepreneurs responded to a questionnaire survey which contained three sections administrated by an online service. Five-point Likert scales were used to collect perceptions and, in addition to statistical descriptors, the Kruskal Wallis and Mann-Whitney U test was used to compare the responses of entrepreneurs. They felt that the 76 t vehicle combination is best suited for transporting timber when transport starts from the forest. When the analysis considered transport from terminals, 76 t combinations remained the most popular, but the popularity of >76 t combinations increased substantially. The farther the LHVs operate from the highways, the less suitable the road network was perceived for timber transport. The results also show that driving and rest time regulations as parts of the working time legislation were perceived as the most disruptive. Further, the availability, responsiveness of technical support, and long delays in solving the queries of drivers were critical problems for the efficient use of in-vehicle ICTapplications. The profitability over the 2014–2018 period has declined more for entrepreneurs using <76 t vehicle combinations. When looking at the development of profitability over the 2020–2024 period, the responses changed in a more positive direction. However, the current skilled workers are retiring and there are too few educated ones to replace them. This is expected to increase wages, which may be reflected in a decreased profitability in the timber transport sector in the future.

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Analysis of variables influencing the cost of wood freight: the case of southeastern Brazil

Rodrigues da Silva,

Schettino,

Andrade Lima

et al. 2023

International Journal of Forest Engineering

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Fuel consumption of a high-capacity transport (HCT) vehicle combination for industrial roundwood hauling: a case study of laden timber truck combinations in Finland

Cited by 6 publications

References 25 publications

The simulation modeling of the operation of a recuperative pneumohydraulic drawbar of a road train coupling device with a self-pulling function

The simulation modeling of the operation of a recuperative pneumohydraulic drawbar of a road train coupling device with a self-pulling function

Impacts of using larger and heavier vehicles on operations and profitability of timber transportation: The case of Finnish operating environment

Analysis of variables influencing the cost of wood freight: the case of southeastern Brazil

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