Fluid arrangement

Patent metadata

Field	Value
Publication number	US-10138995-B2
Application number	US-201415035172-A
Country	US
Kind code	B2
Filing date	Oct 13, 2014
Priority date	Nov 8, 2013
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

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

The invention claimed is:

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

2. The fluid arrangement according to claim 1 , including an auxiliary fluid pump connected to a cooling flow side of each of the fluid pumps.

3. The fluid arrangement according to claim 2 , 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.

4. A The fluid arrangement according to claim 3 , including a respective flow control valve connected between each fluid pump and the pressure accumulator.

5. The fluid arrangement according to claim 4 , wherein the flow control valves are check valves.

6. A The fluid arrangement according to claim 3 , including a prioritizing fluid logic unit upstream of the auxiliary fluid pump and operatively connected to the pressure accumulator.

7. The fluid arrangement according to claim 2 , including a respective valve connected between each fluid pump and the auxiliary fluid pump.

8. The fluid arrangement according to claim 2 , wherein the auxiliary fluid pump is an ejector pump.

9. A method for fluid actuation of at least one motor vehicle drive train component by a fluid arrangement, the method comprising:
operating two fluid pumps to selectively actuate the at least one motor vehicle drive train component and to cool at least one other motor vehicle component,
wherein each fluid pump is operable in a first fluid transport direction and a second fluid transport direction, and
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.

10. The method of claim 9 , further comprising:
providing supplemental flow of cooling fluid, via a pressure accumulator connected on a cooling flow side of the fluid pumps, during periods of low cooling flow from the fluid pumps.

11. The method of claim 10 , wherein a respective flow control valve is connected between each fluid pump and the pressure accumulator.

12. The method of claim 11 , wherein the flow control valves are check valves.

13. The method of claim 9 , wherein a respective valve is connected between each fluid pump and an auxiliary pump.

14. A fluid arrangement for fluid actuation of at least one motor vehicle drive train component, the fluid arrangement comprising:
at least one fluid actuation system including two fluid pumps each having a first fluid transport direction and a second fluid transport direction opposite the first fluid transport direction, wherein the fluid pumps are operable in a first operating mode to provide fluid actuation of the motor vehicle drive train component and are also operable in a second operating mode to provide a stream of fluid to cool the motor vehicle drive train component;
a pressure accumulator connected on a 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; and
a respective flow control valve connected between each fluid pump and the pressure accumulator.

15. The fluid arrangement of claim 14 , 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.

16. The fluid arrangement of claim 14 , further comprising:
an auxiliary fluid pump connected to the cooling flow side of each of the fluid pumps.

17. The fluid arrangement of claim 16 , further comprising:
a respective valve connected between each fluid pump and the auxiliary fluid pump.

Assignees

• Schaeffler Technologies Ag

Inventors

• Herkommer Dominik
• Macmillian Loyal George
• Grethel Marco

Classifications

• F16H61/0025

  Supply of control fluid; Pumps therefor · CPC title

• F16H61/0031

  using auxiliary pumps, e.g. pump driven by a different power source than the engine · CPC title

• F16H57/0436 Primary

  Pumps · CPC title

• F16H57/0446 Primary

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

• F16H3/006

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