Patent ID: 11867298
Assignee: ZF FRIEDRICHSHAFEN AG
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A system pressure valve (9) for a hydraulic system (4) of a motor vehicle transmission (3), comprising:
a valve housing (71);
a piston rod (11);
a first inlet (8);
a second inlet (10);
a first outlet (72);
a second outlet (73); and
a third outlet (65),
wherein a primary pump (6) of the hydraulic system (4) is connectable to the first inlet (8),
wherein a secondary pump (7) of the hydraulic system (4) is connectable to the second inlet (10);
wherein a primary system pressure circuit (16) of the hydraulic system (4) is connectable to the first outlet (72) and to the second outlet (73),
wherein a secondary system pressure circuit (18) of the hydraulic system (4) is connectable to the third outlet (65),
wherein the system pressure valve (9) is configured for displacing the piston rod (11) within the valve housing (71) into a first switching position, into a second switching position, and into a third switching position,
wherein, in the first switching position, the third outlet (65) is connected neither to the first inlet (8) nor to the second inlet (10),
wherein, in the second switching position, the second inlet (10) is connected to the third outlet (65), and
wherein, in the third switching position, the third outlet (65) is connected to the first inlet (8) as well as to the second inlet (10).