COMBINED TILLAGE TOOL Russian patent published in 1999 - IPC

FIELD: agriculture, in particular, equipment for basic cultivation of soil and applying fertilizers and/or ameliorants into soil. SUBSTANCE: tillage tool has pulling device with engine having turbosupercharger, gear box and hydraulic system. Main frame is pivotally connected to auxiliary frame. Both frames are equipped with main and auxiliary working tools and mechanism for periodical lifting of auxiliary tillage devices. Lifting mechanism is hydraulically communicated with distributing valve of pulling device. Tillage tool is further provided with device for automatic changing of engine load, first and second actuating devices and control unit. Engine load measurer has turbosupercharger pressure sensor and matching amplifier connected in series with sensor. Engine load measurer is connected with control unit input, whose output is connected to first and second actuating devices. Such construction allows necessity for determining by operator of entrance into solonetz zone or exit from solonetz zone to be eliminated and working tools to be changed over for tillage. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 2 cl, 2 dwg