Fluid arrangement

Patent metadata

Field	Value
Publication number	US-2016290482-A1
Application number	US-201415035172-A
Country	US
Kind code	A1
Filing date	Oct 13, 2014
Priority date	Nov 8, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

A fluid arrangement including apparatus and a method for fluid actuation of at least one motor vehicle drive train component, such as a transmission or a clutch. The fluid arrangement has at least one fluid actuation system and a fluid energy source. The fluid energy source includes a fluid pump having a first fluid transport direction for actuating the motor vehicle component, and having a second fluid transport direction that is opposite the first fluid transport direction and in which second fluid transport direction the fluid pump provides a stream of fluid to cool the motor vehicle component.

First claim

1 . A fluid arrangement for fluid actuation of at least one motor vehicle drive train component, said fluid arrangement comprising:
at least one fluid actuation system including a fluid energy source, wherein the fluid energy source includes a fluid pump having a first fluid transport direction and having a second fluid transport direction opposite the first fluid transport direction, and wherein the fluid pump is operable in a first operating mode to provide fluid actuation of the motor vehicle drive train component and is also operable in a second operating mode to provide a stream of fluid to cool the motor vehicle drive train component.

2 . A fluid arrangement according to claim 1 , wherein the fluid arrangement includes at least two motor vehicle drive train components including at least one of two indexing transmissions and at least one of two indexing clutches operable by two fluid actuating systems having two fluid energy sources, wherein the fluid energy sources include two fluid pumps each pump having a first fluid transport direction and a second fluid transport direction opposite to the first fluid transport direction, wherein the respective fluid pumps are operable provide a stream of fluid to cool at least one motor vehicle drive train component that is not operated and wherein the not operated motor vehicle drive train component is at least one of a dual clutch and a transmission.

3 . A fluid arrangement according to claim 2 , wherein the fluid pumps are each connected to a fluid reservoir by a respective first valve on a pump input side and a respective second valve on a pump output side.

4 . A fluid arrangement according to claim 2 , including an auxiliary fluid pump connected to a cooling flow side of each of the fluid pumps.

5 . A fluid arrangement according to claim 4 , wherein a pressure accumulator is connected on the cooling flow side of the fluid pumps to provide supplemental flow of cooling fluid during periods of low cooling flow volume from the fluid pumps.

6 . A fluid arrangement according to claim 5 , including a respective valve connected between the fluid pumps and the auxiliary pump.

7 . A fluid arrangement according to claim 5 , including a respective flow control valve connected between each fluid pump and the pressure accumulator.

8 . A fluid arrangement according to claim 7 , wherein the flow control valves are check valves.

9 . A method for fluid actuation of at least one motor vehicle drive train component by a fluid arrangement according to claim 1 , wherein the fluid pump is operated in the first fluid transport direction to actuate the at least one motor vehicle drive train component and is operated in the second fluid transport direction to cool at least one other motor vehicle drive train component.

10 . A method for fluid actuation of at least two motor vehicle drive train components having a fluid arrangement according to claim 2 , wherein the fluid pumps are each operated in the first fluid transport direction to actuate a respective motor vehicle drive train component, and is operated in the second fluid transport direction to cool at least one other not-fluid-operated motor vehicle drive train component.

11 . A fluid arrangement according to claim 4 , wherein the auxiliary pump is an ejector pump.

12 . A fluid arrangement according to claim 5 , including a prioritizing fluid logic unit upstream of the auxiliary pump and operatively connected to the pressure accumulator.

Assignees

• Schaeffler Technologies Ag

Inventors

• Herkommer Dominik
• Macmillian Loyal George
• Grethel Marco

Classifications

• F16H3/006

  power being selectively transmitted by parallel flow paths, e.g. dual clutch transmissions · CPC title

• F16H2061/0034

  Accumulators for fluid pressure supply; Control thereof · CPC title

• F16H57/0446 Primary

  the supply forming part of the transmission control unit, e.g. for automatic transmissions · CPC title

• F16H57/0436 Primary

  Pumps · CPC title

• F15B1/02

  Installations or systems with accumulators · CPC title