Hydraulic arrangement and utility vehicle
AssigneeDeere & Company
InventorsManuel Billich, Michael Meid
Life of this patent
Estimating the term…
Abstract
A hydraulic arrangement for a utility vehicle. The arrangement may include a hydraulic displacement pump which is connected via a pump output to a supply connection as a hydraulic interface for supplying hydraulic consumers of the utility vehicle. In addition, the device may include a hydraulic auxiliary pump and an auxiliary supply connection as a hydraulic interface for alternatively supplying at least some of the consumers. The device may include a displacement control unit which is dependent on an output pressure of the auxiliary pump for displacing the displacement pump in such a manner that a hydraulic working connection of a displacement cylinder of the displacement control unit is connected to an output of the auxiliary pump.
Claims11
A hydraulic arrangement for a utility vehicle, the hydraulic arrangement comprising:
- a hydraulic displacement pump which is connected via a pump output to a supply connection as a hydraulic interface for supplying hydraulic consumers of the utility vehicle;
- a hydraulic auxiliary pump and an auxiliary supply connection as a hydraulic interface for alternatively supplying at least some of the consumers;
- a displacement control unit which is dependent on an output pressure of the auxiliary pump for displacing the displacement pump in such a manner that a hydraulic working connection of a displacement cylinder of the displacement control unit is connected to an output of the auxiliary pump;
- and
- a retention valve unit which has two different switching positions being hydraulically connected in a throughflow path between the working connection of the displacement cylinder and a return connection and the pump output in such a manner that the retention valve unit acts as a hydraulic interruption or as a hydraulic connection in the throughflow path depending on the activated switching position thereof;
- wherein the retention valve unit has, in the throughflow path at the connection side thereof facing away from the working connection of the displacement cylinder, a hydraulic valve connection which can be connected to the pump output in accordance with an output pressure of the displacement pump.
A utility vehicle, comprising:
- a drive motor;
- and
- a hydraulic arrangement including:
- a hydraulic displacement pump which is connected via a pump output to a supply connection as a hydraulic interface for supplying hydraulic consumers of the utility vehicle;
- a hydraulic auxiliary pump and an auxiliary supply connection as a hydraulic interface for alternatively supplying at least some of the consumers;
- a displacement control unit which is dependent on an output pressure of the auxiliary pump for displacing the displacement pump in such a manner that a hydraulic working connection of a displacement cylinder of the displacement control unit is connected to an output of the auxiliary pump;
- and
- a pressure sensor which generates sensor signals being hydraulically connected to the output of the auxiliary pump, wherein in accordance with the sensor signals at least one of 1) a drive of the auxiliary pump can be controlled or 2) a retention valve unit can be controlled in order to change a switching position thereof.
A hydraulic arrangement for a utility vehicle, the hydraulic arrangement comprising:
- a hydraulic displacement pump which is connected via a pump output to a supply connection as a hydraulic interface for supplying hydraulic consumers of the utility vehicle;
- a hydraulic auxiliary pump and an auxiliary supply connection as a hydraulic interface for alternatively supplying at least some of the consumers;
- a displacement control unit which is dependent on an output pressure of the auxiliary pump for displacing the displacement pump in such a manner that a hydraulic working connection of a displacement cylinder of the displacement control unit is connected to an output of the auxiliary pump;
- and
- a pressure sensor which generates sensor signals being hydraulically connected to the output of the auxiliary pump, wherein in accordance with the sensor signals at least one of 1) a drive of the auxiliary pump can be controlled or 2) a retention valve unit can be controlled in order to change a switching position thereof.
Dependencies are inferred from the claim text.