WORKING CYLINDER CONTROL AND REGULATION DEVICE Russian patent published in 2003 - IPC

FIELD: mechanical engineering. SUBSTANCE: invention relates to self-propelled harvesters. Proposed device contains piston pressure spaces which are connected by means of spool valves with central hydraulic system of working set and are connected by means of built-in cutoff valve in parallel with hydraulic accumulator to be charged, spool valves and cutoff valve are made to be controlled by control system coupled with preset value setter, and device are provided for automatic hydraulic communication with pressure or drain lines of hydraulic system in case of pressure variables such as overloads or drops of pressure relative to preset value. Working cylinders are made as double-acting cylinders with one-side piston rod whose rod pressure spaces are selectively coupled by means of change-over valves with piston pressure spaces with hydraulic accumulators or with drain line of central hydraulic system, and through spool valves are connected with central hydraulic system. Working cylinder is furnished with travel sensor connected with electronic control system of machine and is designed to provide control and take up position of working piston. EFFECT: improved reliability. 3 cl, 5 dwg