Patent ID: 11971097
Assignee: DEERE & COMPANY
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 11:
12. A hydraulic arrangement for a vehicle transmission, comprising:
a hydraulic pump for providing a system pressure for a first hydraulic system circuit and a lubrication pressure for a second hydraulic lubrication circuit;
a control valve connected between a pump outlet of the pump and the first hydraulic system circuit and the second hydraulic lubrication circuit and having a first and a second switching position; and
a holding valve unit connected between the system circuit and the control valve, the holding valve unit including an actuable electromagnet for releasably maintaining the second switching position of the control valve, the electromagnet actuated by a control electronics connected to a pressure transducer measuring the system pressure in the system circuit;
wherein the control valve acts as a hydraulic connection only between the pump and the system circuit in the first switching position and as a hydraulic connection only between the pump and the lubrication circuit in the second switching position.