Fuel consumption comparison of two forwarders in lowland forests of pedunculate oak

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Abstract

Fuel consumption of forest machinery and vehicles depends mainly on terrain conditions, working methods, drivers’ skills, engine load under working conditions, engine speed, type and technical characteristics of the machine. In timber harvesting operations, fuel consumption is significant for both, economic (costs), and environmental issues (80-95% of exhaust emissions and soot particles are associated with fuel consumption). The objective of this study was to compare fuel consumption in two different forwarders and to analyse two different measuring devices for fuel consumption. Fuel consumption was measured on a 6-wheeled Valmet 840.2 forwarder and an 8-wheeled Valmet 860.4 during roundwood and energy wood extraction in winter period. A differential fuel flow meter and a fuel measuring probe were used for measuring fuel consumption as well as a Fleet Management System (FMS) for transmitting measured data. Fuel consumption was expressed in six different ways depending on the stage of the working cycle, time, travelled distance, load volume and load mass. Finally, both the advantages and disadvantages of the used fuel measuring devices were gained. The results indicated higher fuel consumption of the smaller Valmet 840.2 forwarder due to lower soil bearing capacity and longer extraction distances. For both forwarders, higher fuel consumption (expressed in l t -1 km -1 ) was observed while extracting energy wood due to its lower overall mass.

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APA

Pandur, Z., Šušnjar, M., Bačić, M., Duka, A., Lepoglavec, K., & Nevečerel, H. (2019). Fuel consumption comparison of two forwarders in lowland forests of pedunculate oak. IForest, 12(1), 125–131. https://doi.org/10.3832/ifor2872-011

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