Patent ID: 8001776
Filing Date: 2011-08-23
Classification: F04B

Abstract:
1. Hydraulic circuit arrangement for setting the delivery volume of a pump ( 2 ), with an electrically activatable control-valve unit ( 11 ), by means of which, alternately, an active side ( 8 ) of a servo system ( 5 , 6 ) can be acted upon with pressure and, at the same time, its passive side ( 7 ) can be relieved to the tank, and with a device for pressure limiting pressure regulation, which comprises pressure limiting valves ( 24 , 25 ), by means of which the working lines (A, B) of the pump ( 2 ) can be connected to the servo lines ( 9 , 10 ), check valves ( 17 , 18 ) which shut off in the direction of the servo system ( 5 , 6 ) being provided, by means of which the two servo sides ( 7 , 8 ) can be connected in each case to the charge pressure via a relief line ( 16 ), furthermore the device for pressure limiting pressure regulation comprising an orifice ( 21 ) which can be positioned in a line leading to the passive servo side ( 7 ).