Hydraulic module with switch valve for controlling a hydraulic fluid flow of a connecting rod for an internal combustion engine with variable compression and connecting rod

Patent metadata

Field	Value
Publication number	US-10502128-B2
Application number	US-201815955925-A
Country	US
Kind code	B2
Filing date	Apr 18, 2018
Priority date	May 4, 2017
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

A hydraulic module with a switch valve for controlling a flow of a hydraulic fluid in a connecting rod for an internal combustion engine with variable compression with an eccentric element adjustment arrangement for adjusting an effective connecting rod length, wherein the eccentrical element adjustment arrangement includes a first cylinder and a second cylinder configured as hydraulic chambers, wherein a first inlet is provided for feeding the hydraulic fluid into the first cylinder and a second inlet is provided for feeding the hydraulic fluid into the second cylinder, wherein a first outlet is provided for draining the hydraulic fluid from the first cylinder and a second outlet is provided for draining the hydraulic fluid from the second cylinder wherein a first check valve is associated with the first cylinder and a second check valve is associated with the second cylinder.

First claim

What is claimed is:

1. A hydraulic module with a switch valve for controlling a flow of a hydraulic fluid in a connecting rod for an internal combustion engine with variable compression with an eccentrical element adjustment arrangement for adjusting an effective connecting rod length,
wherein the eccentrical element adjustment arrangement includes a first cylinder and a second cylinder configured as hydraulic chambers,
wherein a first inlet is provided for feeding the hydraulic fluid into the first cylinder and a second inlet is provided for feeding the hydraulic fluid into the second cylinder,
wherein a first outlet is provided for draining the hydraulic fluid from the first cylinders and a second outlet is provided for draining the hydraulic fluid form the second cylinder,
wherein a first check valve is associated with the first cylinder and a second check valve is associated with the second cylinder,
wherein the first check valve is arranged in the first inlet and facilitates feeding the hydraulic fluid into the first cylinder and prevents draining the hydraulic fluid from the first cylinder,
wherein the second check valve is arranged in the second inlet and facilitates feeding the hydraulic fluid into the second cylinder and prevents draining the hydraulic fluid from the second cylinder,
wherein the switch valve includes a piston which is displaceable into a first switching position or a second switching position, and
wherein the first cylinder and the second cylinder are connected so that hydraulic fluid is conductible in the first switching position from the first cylinder into the second cylinder, and
wherein a supply conduit from the switch valve into a bearing shell of the connecting rod includes a second aperture configured as a second throttle through which the hydraulic fluid can drain in a throttled manner and is suction feedable in a throttled manner in the first switching position.

2. The hydraulic module according to claim 1 , wherein the hydraulic fluid is conductible in the second switching position from the second cylinder into the first cylinder.

3. The hydraulic module according to claim 1 , wherein the outlet of the second cylinder includes at least one first aperture configured as a throttle.

4. The hydraulic module according to claim 1 , wherein at least one of the first check valves or the second check valve or the at least one first aperture is integrated into the switch valve.

5. The hydraulic module according to claim 4 ,
wherein at least one of the first check valve and the second check valve includes an essentially annular band element with a circumference and configured as a closure element,
wherein the essentially annular band element envelops the housing of the switch valve at least partially with the circumference and is at (east partially supported at the housing and closes at least one opening of the housing in a closed position of the check valve.

6. The hydraulic module according to claim 5 , wherein the at least one first check valve and the at least one second check valve opens in a radially outward direction.

7. The hydraulic module according to claim 1 , wherein the switch valve is configured as a 3/2 way valve.

8. The hydraulic module according to claim 1 ,
wherein the first inlet and the first outlet of the first cylinder is configured as a conduit in the switch valve, or
wherein the second inlet and the second outlet of the second cylinder is configured as a conduit in the switch valve.

9. A connecting rod for an internal combustion engine with variable compression with an eccentrical element adjustment device for adjusting an effective connecting rod length with a hydraulic module according to claim 1 .

10. A hydraulic module with a switch valve for controlling a flow of a hydraulic fluid in a connecting rod for an internal combustion engine with variable compression with an eccentrical element adjustment arrangement for adjusting an effective connecting rod length,
wherein the eccentrical element adjustment arrangement includes a first cylinder and a second cylinder configured as hydraulic chambers,
wherein a first inlet is provided for feeding the hydraulic fluid into the first cylinder and a second inlet is provided for feeding the hydraulic fluid into the second cylinder,
wherein a first outlet is provided for draining the hydraulic fluid from the first cylinders and a second outlet is provided for draining the hydraulic fluid form the second cylinder,
wherein a first check valve is associated with the first cylinder and a second check valve is associated with the second cylinder,
wherein the first check valve is arranged in the first inlet and facilitates feeding the hydraulic fluid into the first cylinder and prevents draining the hydraulic fluid from the first cylinder,
wherein the second check valve is arranged in the second inlet and facilitates feeding the hydraulic fluid into the second cylinder and prevents draining the hydraulic fluid from the second cylinder,
wherein the switch valve includes a piston which is displaceable into a first switching position or a second switching position, and

wherein the first cylinder and the second cylinder are connected so that hydraulic fluid is conductible in the first switching position from the first cylinder into the second cylinder,
wherein a supply conduit of the switch valve includes a second aperture configured as a second throttle through which the hydraulic fluid can drain in a throttled manner and is suction feedable in a throttled manner in the first switching position and
wherein a third check valve is provided in the supply conduit parallel to the second aperture wherein the third check valve facilitates feeding hydraulic fluid into the switch valve and prevents an outflow of the hydraulic fluid.

11. The hydraulic module according to claim 10 , wherein the third check valve includes an essentially annular band element configured as a closure element which is at least partially supported at a housing of the switch valve and which closes at least one first opening of the housing in a closed position of the check valve.

12. The hydraulic module according to claim 11 , wherein the check valve is arranged in an interior of the housing of the switch valve and opens in a radially inward direction.

13. The hydraulic module according to claim 11 , wherein the essentially annular band element includes a radial bore hole that is configured as the second aperture and arranged on a circumference of the essentially annular band element.

14. The hydraulic module according to claim 11 , wherein the essentially annular band element ( 46 ) includes a notch that is oriented towards a circumference of the essentially annular band element ( 46 ) and configured as the second aperture ( 19 ).

15. The hydraulic module according to claim 11 , wherein the housing includes a notch oriented towards a circumference of the band element and configured as the second aperture.

16. The hydraulic module according to claim 10 , wherein the aperture and the third check valve are provided as a combined element.

17. The hydraulic module according to claim 10 , wherein the third check valve is configured as a ball check valve and arranged in the housing of the switch valve and the housing includes a notch that extends parallel to a hydraulic fluid path of the check valve and that is configured as the second aperture.

Assignees

• ECO Holding 1 GmbH

Inventors

• Mudra Alexander
• Schulze Dietmar
• Rupp Wolfgang

Classifications

• F15B2211/30505

  Non-return valves, i.e. check valves · CPC title

• F15B11/16

  with two or more servomotors · CPC title

• F15B2211/3059

  having multiple valves for multiple output members · CPC title

• F16C7/06

  Adjustable connecting-rods · CPC title

• F15B2211/41545

  being connected to multiple output members · CPC title