Valve unit and motor vehicle

Patent metadata

Field	Value
Publication number	US-9752697-B2
Application number	US-201414540788-A
Country	US
Kind code	B2
Filing date	Nov 13, 2014
Priority date	Jan 31, 2014
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

A valve unit for a motor vehicle having a valve housing, which includes a valve inlet and a valve outlet, and having a valve body disposed in the valve housing, which includes a cross-section, increasing up to an inflection point and decreasing once past the inflection point, and which is guided from a closed position in which the valve body seals the valve inlet to a final opened position in which the valve body abuts a stop element fixed in the valve housing, releasing the valve inlet, and in which an inflow section is formed between the valve inlet and the inflection point of the valve body, and an outflow section is formed between the inflection point of the valve body and the valve outlet.

First claim

The invention claimed is:

1. A valve unit for a motor vehicle comprising at least one valve housing, said valve housing including a valve inlet, a valve outlet and a chamber formed therebetween, and at least one valve body disposed within the chamber in the valve housing and having an inflection point, which when viewed from the valve inlet in the direction of the valve outlet includes a cross-section that increases up to the inflection point and decreases past the inflection point, and which is guided from a closed position in which the valve body seals the valve inlet to a final opened position in which the valve body abuts a stop element fixed in the valve housing, releasing the valve inlet, wherein an inflow section is formed in the chamber between the valve inlet and the inflection point of the valve body and an outflow section is formed in the chamber between the inflection point of the valve body and the valve outlet when the valve body is in the final opened position so that a cross-sectional dimension of the chamber gradually reduces in size from the inflow section past the inflection point to the outflow section to provide a lower flow rate, a lower dynamic pressure and a higher static pressure of a fluid flowing through the valve in the inflow section than the outflow section, where the inflow section includes an expanding cross-section in the area of the valve inlet, which expands in the direction of the valve outlet to a maximum cross-section and, once past the maximum cross-section, narrows continually and transitions seamlessly into the outflow section, and where the maximum cross-section is located upstream of the valve body when in the final opened position.

2. The valve unit according to claim 1 , wherein the inflow section and/or the outflow section includes a truncated cone-shaped cross-section in the area of the valve body.

3. The valve unit according to claim 1 , having at least one stop element, which is disposable in or disposed in the outflow section, and which is indirectly or directly abutted by the valve body in the final opened position.

4. The valve unit according to claim 3 , having at least one guide means, which is fixable on or is fixed on the valve body and/or on the stop element, and which supports the valve body against the stop element in the final opened position.

5. The valve unit according to claim 4 , wherein the stop element and/or the guide means includes at least one recess extended in the flow direction, and/or wherein the valve body includes at least one notch, which opens into the recess of the stop element and/or the guide means at least in the final opened position, in order to establish a fluid flow from the inflow section to the outflow section, in the final opened position.

6. The valve unit according to claim 1 , having at least one return means, with which the valve body may be tensioned into the closed position.

7. The valve unit according to claim 6 , wherein the return means includes a return spring, which is fixable or is fixed, at least in sections, in the recess of the guide means, and which is supported on the one hand against the stop element and on the other hand against the valve body or the valve housing.

8. The valve unit according to claim 3 , wherein the valve housing, the inflow section, the outflow section, the stop element and/or the valve body have a rotationally symmetrical design.

9. The valve unit according to claim 1 , having at least one sealing element, which in the closed position of the valve body abuts the valve body and the valve inlet.

10. The valve unit according to claim 9 , wherein the sealing element is fixable in or is fixed in the valve housing between the valve inlet and the inflow section.

11. The valve unit according to claim 9 , wherein the sealing element is fixable on or is fixed on the valve body.

12. The valve unit according to claim 9 , wherein the valve body includes at least one head part and one base part, which are detachably fixable to one another, and between which the sealing element is fixable or is fixed by joining the head part and the base part, in particular, forming a tongue and groove.

13. The valve unit according to claim 12 , wherein the head part and/or the base part includes an arcuate or n-angled section, and/or the valve body includes a ball or arrow-shaped body.

14. A motor vehicle having at least one valve unit comprising at least one valve housing, said valve housing including a valve inlet, a valve outlet and a chamber formed therebetween, and at least one valve body disposed within the chamber in the valve housing and having an inflection point, which when viewed from the valve inlet in the direction of the valve outlet includes a cross-section that increases up to the inflection point and decreases past the inflection point, and which is guided from a closed position in which the valve body seals the valve inlet to a final opened position in which the valve body abuts a stop element fixed in the valve housing, releasing the valve inlet, wherein an inflow section is formed in the chamber between the valve inlet and the inflection point of the valve body and an outflow section is formed in the chamber between the inflection point of the valve body and the valve outlet when the valve body is in the final opened position so that a cross-sectional dimension of the chamber gradually reduces in size from the inflow section past the inflection point to the outflow section to provide a lower flow rate, a lower dynamic pressure and a higher static pressure of a fluid flowing through the valve in the inflow section than the outflow section, where the inflow section includes an expanding cross-section in the area of the valve inlet, which expands in the direction of the valve outlet to a maximum cross-section and, once past the maximum cross-section, narrows continually and transitions seamlessly into the outflow section, and where the maximum cross-section is located upstream of the valve body when in the final opened position.

15. The motor vehicle according to claim 14 , wherein the inflow section includes an expanding cross-section in the area of the valve inlet, which expands in the direction of the valve outlet to a maximum cross-section and, once past the maximum cross-section, narrows continually and transitions seamlessly into the outlet section.

16. The motor vehicle according to claim 14 , wherein the inflow section and/or the outflow section includes a truncated cone-shaped cross-section in the area of the valve body.

17. The motor vehicle according to claim 14 , having at least one stop element, which is disposable in or disposed in the outflow section, and which is indirectly or directly abutted by the valve body in the final opened position.

18. The motor vehicle according to claim 17 , having at least one guide means, which is fixable on or is fixed on the valve body and/or on the stop element, and which supports the valve body against the stop element in the final opened position.

19. The motor vehicle according to claim 18 , wherein the stop element and/or the guide means includes at least one recess extended in the flow direction, and/or wherein the valve body includes at least one notch, which opens into the recess of the stop element and/or the guide means at least in the final opened position, in order to establish a fluid flow from the inflow section to the outflow section, in the final opened position.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Hobmeyr Ralph

Classifications

• F16K27/0254

  with conical shaped valve members · CPC title

• F16K27/0209

  Check valves or pivoted valves · CPC title

• F16K15/044

  spring-loaded · CPC title

• F16K15/183

  Mechanical Engineering · mapped topic

• F16K27/0245 Primary

  with ball-shaped valve members · CPC title