Hydrostatically operated clutch system

Patent metadata

Field	Value
Publication number	US-2016356322-A1
Application number	US-201415111953-A
Country	US
Kind code	A1
Filing date	Dec 9, 2014
Priority date	Jan 23, 2014
Publication date	Dec 8, 2016
Grant date	—

Abstract

A hydrostatically operated clutch system having a hydrostatic clutch actuator for hydrostatically operating a clutch, in particular a pulse separation clutch of a hybrid drive, such that the hydrostatic clutch actuator is combined with a valve arrangement which is to be opened actively and enables the clutch to be engaged rapidly.

First claim

1 . A hydrostatically operated clutch system, comprising a hydrostatic clutch actuator for hydrostatic operation of a clutch, the hydrostatic clutch actuator is combined with a valve device that is actively opened, which allows a rapid closing of the clutch.

2 . The hydrostatically operated clutch system according to claim 1 , wherein the clutch is a separating clutch with a pulse start function.

3 . The hydrostatically operated clutch system according to claim 1 , further comprising a spring device, the clutch is closed in an idle state by the spring device, and is opened by the hydrostatic clutch actuator.

4 . The hydrostatically operated clutch system according to claim 1 , wherein the valve device is embodied and arranged to provide for a rapid pressure reduction on a master side.

5 . The hydrostatically operated clutch system according to claim 1 , wherein the valve device comprises a clutch pressure connection and a tank connection, allowing a rapid pressure reduction for opening the clutch.

6 . The hydrostatically operated clutch system according to claim 5 , wherein the clutch pressure connection and the tank connection of the valve device are closed in a closed position of the valve device by a valve piston.

7 . The hydrostatically operated clutch system according to claim 6 , wherein the valve piston delimits radially inwardly an annular chamber, which is limited in an axial direction by two seals, and is limited radially outwardly by a valve housing with the tank connection.

8 . A method for operating a hydrostatically operated clutch system according to claim 1 , comprising rapidly closing the open clutch by an active opening of the valve device.

9 . The method according to claim 8 , further comprising when closing the clutch, by the active opening of the valve device, moving a master piston in a direction of a minimum position.

10 . The method according to claim 9 , wherein the valve device remains open until the master piston has reached its minimum position.

Assignees

• Schaeffler Technologies Ag

Inventors

• Hodrus Erhard

Classifications

• F16D25/088 Primary

  the line of action of the fluid-actuated members being distinctly separate from the axis of rotation · CPC title

• F16D29/005

  with a fluid pressure piston driven by an electric motor · CPC title

• F16D2025/081

  Hydraulic devices that initiate movement of pistons in secondary cylinders for actuating clutches, i.e. primary cylinders · CPC title

• F16D48/066

  Control of fluid pressure, e.g. using an accumulator (F16D48/062, F16D48/068 take precedence) · CPC title

• F16D2500/1024

  combined with hydraulic actuation · CPC title