Soil tillage is a very energy-intensive operation. A general expectation is to reduce energy consumption and reduce soil compaction with as few turns and interventions as possible. Thus, more and more attention is being paid to the use of active tillage machines. The aim of the present work is to test a new approach to optimize PTO-driven tilling machine operations regarding energy consumption. A real, active tillage machine, the MSS-140 type spading machine, was investigated in the Matlab® Simscape™ environment. The solid model of the spading machine was built using actual dimensions. The work done by a single spade is broken down into elementary processes. The acting forces on the implement, in each elementary process for different advancing speeds, were modelled and calculated. The model is suitable for illustrating the dynamics of loads and for calculating the mechanical work. The model was also tested in comparison with real fuel consumption. The consumed fuel quantity was measured and the energy requirement for the model calculated at three advancing speeds. A comparison between the measured and calculated energy consumption values was made: the calculated results are similar to the measured values; the mean difference is 9.91%, with a standard deviation 3.3%.

The preparation of the seedbed in greenhouses represents an essential work for the growth and development of plants. It is an important consumer of energy. The spading machines are meant to carry out the basic works in the greenhouses. Their work organs are called spades. In this paper we study the kinematics and the dynamics of these tools.

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A műszaki oktatás folyamatának fontos része a folyamatok kísérletek és szemléltetőeszközök segítségével történő bemutatása. Ez a közvetlen érzéki tapasztalás az ismeretszerzés egyik forrása. A szemléltetés biztosítja a tananyag mélyebb megértését, így intenzívebbé válik a megismerési folyamat. Dolgozatunkban bemutatunk egy általunk tervezett és megvalósított hűtőgép-szemléltető eszközt, majd egy valós hűtőgépen méréseket végzünk a kompresszoros hűtőkörfolyamat tanulmányozása érdekében. A mérési pontokat a bemutatóeszközön szemléltetjük.