Patent ID: 6997300

Claim:
A device for the control of a hydraulically actuated clutch ( 1 ) of an automatic transmission of a motor vehicle, with a slide-valve mechanism ( 3 ) in which a valve piston ( 4 ) can move between a first working space ( 7 ) which can be pressurized with a control pressure (p_MV) that can be adjusted by means of an electrically operated actuator ( 9 ), and a restoring space ( 10 ) containing a restoring spring ( 11 ) that acts on the valve piston ( 4 ), the valve piston ( 4 ) being formed with several piston sections ( 4 A, 4 B) which delimit a pressure space ( 12 ) which is connected via a line ( 13 ) to a clutch space ( 2 ) of the clutch ( 1 ) and, depending on the position of the valve piston ( 4 ), communicates with one of a pressure supply line ( 14 ) that delivers a system pressure (p_sys) and with a pressure-relief line ( 15 ), wherein as an emergency operation device when an actuator ( 9 ) is switched off, the pressure of the first working space ( 7 ) is maintained during the transition to an emergency operating mode associated with the current operating mode by means of a second piston ( 16 , 17 ) which communicates via a second working space ( 18 , 19 ) with the clutch space ( 2 ) of one of the clutch ( 1 ) and a second clutch connected in parallel therewith.