Intermediate regularities on the energetical parameters of the tractor engines
2010
Vilde, A., Latvia Univ. of Agriculture, Ulbroka, Riga reg. (Latvia). Research Institute of Agricultural Machinery | Pirs, E., Latvia Univ. of Agriculture, Ulbroka, Riga reg. (Latvia). Research Institute of Agricultural Machinery
The efficiency of tractors applied in agriculture is usually estimated as an integrated value including the indices of their intensive and extensive utilisation. The application intensity of tractors and machines is characterized by their working capacity per unit of time. An important factor in fuel consumption is the engine loading. The presented generalised curves of the diesel engine loads show in percentage the variations in the values of the indices characterising the operation of the engine: the total fuel consumption, the torsional moment (the moment of rotation), the number of crankshaft revolutions and the specific fuel consumption depending on the effective power developed by the engine (also in percentage). If the engine loading falls, the specific fuel consumption rises, at first, at a slower rate (up to about 80 % loading), but further it increases more and more rapidly. As a result of conducted theoretical investigations, carried out in the Research Institute of Agricultural Machinery at the Latvia University of Agriculture in years 2007-2008, the intermediate regularities of the energetic parameters of the tractor engines are determined. These regularities mathematically interface the energetic indices of the tractor diesel engines. It follows from this that the ratio of the engine loading may be determined by measuring the fuel consumption in a corresponding moment of time, the data saved in the data logger, and their interpretation using an appropriate computer programme.
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