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Use of emission indicators related to CO2 emissions in the ecological assessment of an agricultural tractor
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Poznan Univeristy of Technology, Faculty of Civil and Transport Engineering, Institute of Combustion Engines and Powertrains, ul. Piotrowo 3, 61-138 Poznań, Poland
Łukasiewicz Research Network - Industrial Institute of Agricultural Engineering, ul. Starołęcka 31, 60-963 Poznań, Poland
Publication date: 2021-12-31
Eksploatacja i Niezawodność – Maintenance and Reliability 2021;23(4):605-611
  • The dimensionlessness of the emission indicator M, it is possible to compare not only vehicles of the same category, but also of objects of different purposes.
  • It is necessary to determine the resistances of the internal combustion engine and take into account their values when determining the torque in tests carried out during the vehicle operation and the work performed by the drive system.
  • Increasing the driving speed of the tractor during typical field work from 5 km/h to 15 km/h may have a positive impact on the overall exhaust emission results of toxic compounds
The paper presents the proposed proprietary M exhaust emission indicator, which is based on the assumption that CO2 emissions are a measure of the correctness of the combustion process. The measurements were performed using a farm tractor meeting the Tier 3 emission norm, operated in real conditions during plowing work. The tests were carried out for a given land section at three speeds In the analysis of test results, the net engine work was used, as it is carried out in the type approval procedures. When measuring in real operating conditions, the torque read from the OBD system is overstated because it takes into account the engine’s internal resistance. In the analysis of test results, the fuel consumption, emission indicators of gaseous compounds and particulates were determined, and the best conditions for conducting agricultural works were indicated in terms of their impact on the natural environment. The aim of the work is to verify the possibility of determining the emission index for an off-road vehicle and a comparative analysis of its values for various operating parameters of a farm tractor. On this basis, it was found that the lowest values of the M identity were recorded for the test characterized by a vehicle speed of 15 km/h.
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