Valve for an internal combustion engine

Patent metadata

Field	Value
Publication number	US-10934900-B2
Application number	US-201816116466-A
Country	US
Kind code	B2
Filing date	Aug 29, 2018
Priority date	Aug 30, 2017
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

The present disclosure relates to a valve, preferably an exhaust gas or gas exchange valve, having a valve head which has a front face and a rear face, the front face of the valve head including an edge region and a bulge towards the outside which has a crest region. The valve, in order to reduce the mass of the bulge of the valve head, including a laterally outer part section of the edge region that is of flatter configuration in comparison with a laterally inner part section of the edge region, or the edge region includes at least one discontinuity in cross section.

First claim

I claim:

1. A valve comprising:
a valve head which has a front face and a rear face, the front face of the valve head including an edge region and a bulge which has a crest region, wherein in order to reduce the mass of the bulge of the valve head, a laterally outer part section of the edge region is of flatter configuration in comparison with a laterally inner part section of the edge region, or the edge region includes at least one discontinuity in cross section, wherein the valve is configured as a solid-body valve and wherein a neutral axis of the valve head extends in sections on a load side of an imaginary reference plane, the reference plane running through an effective centre of a valve seat face of the valve head and transversely with respect to a valve stem of the valve.

2. The valve according to claim 1 , wherein the valve is an exhaust gas or gas exchange valve.

3. The valve according to claim 1 , wherein in order to reduce the mass of the bulge of the valve head, the edge region includes at least one discontinuity in cross section, wherein the at least one discontinuity includes at least one vertex, inflection point or reversal point.

4. The valve according to claim 1 , wherein in order to reduce the mass of the bulge of the valve head, the edge region includes at least one discontinuity in cross section, wherein, in cross section, the at least one discontinuity is arranged on the outside relative to a laterally inner end of the edge region or is arranged on the inside relative to a laterally outer end of the edge region.

5. The valve according to claim 4 , wherein the inner lateral end adjoins the crest region or the outer lateral end is the outermost lateral end of the front face.

6. The valve according to claim 1 , wherein the outer part section of the edge region has a lower slope in comparison with the inner part section of the edge region, or the outer part section of the edge region has a slope in a range of less than ±5°.

7. The valve according to claim 1 , wherein the outer part section of the edge region is of substantially bulge-free configuration at least in sections or the bulge does not extend as far as a laterally outer end of the valve head.

8. The valve according to claim 1 , wherein the bulge of the valve head is formed by way of a spherical, parabolic or frustoconical shaped-out formation, wherein the outer part section of the edge region differs from the spherical, parabolic or frustoconical shaped-out formation.

9. The valve according to claim 1 , wherein the bulge of the valve head is arranged centrally and the outer part section of the edge region includes the laterally outermost part of the front face.

10. The valve according to claim 1 , wherein the inner part section of the edge region forms a lateral part of the bulge, or the outer part section of the edge region extends laterally next to and outside the bulge.

11. The valve according to claim 1 , wherein the outer part section of the edge region or the at least one discontinuity extends annularly in a rotationally symmetrical manner.

12. The valve according to claim 1 , wherein the neutral axis of the valve head is bulged towards the load side.

13. The valve according to claim 1 , wherein the crest region of the neutral axis runs eccentrically relative to the valve stem.

14. The valve according to claim 1 , wherein the neutral axis of the valve head extends predominantly on the load side of the reference plane.

15. The valve according to claim 1 , wherein the effective centre of the valve seat face of the valve head is defined by way of the centre of the contact area between the valve seat face of the valve head and a valve seat.

16. The valve according to claim 1 , wherein the front face of the valve head is of S-shaped configuration at least in sections in cross section.

17. A valve/valve seat combination comprising:
a valve including a valve head which has a front face and a rear face, the front face of the valve head including an edge region and a bulge which has a crest region, wherein in order to reduce the mass of the bulge of the valve head, a laterally outer part section of the edge region is of flatter configuration in comparison with a laterally inner part section of the edge region, or the edge region includes at least one discontinuity in cross section, wherein the valve is configured as a solid-body valve and wherein a neutral axis of the valve head extends in sections on a load side of an imaginary reference plane, the reference plane running through an effective centre of a valve seat face of the valve head and transversely with respect to a valve stem of the valve; and
a valve seat for the valve.

18. A motor vehicle, comprising:
a valve/valve seat combination, the combination further comprising,
a valve including a valve head which has a front face and a rear face, the front face of the valve head including an edge region and a bulge which has a crest region, wherein in order to reduce the mass of the bulge of the valve head, a laterally outer part section of the edge region is of flatter configuration in comparison with a laterally inner part section of the edge region, or the edge region includes at least one discontinuity in cross section, wherein the valve is configured as a solid-body valve and wherein a neutral axis of the valve head extends in sections on a load side of an imaginary reference plane, the reference plane running through an effective centre of a valve seat face of the valve head and transversely with respect to a valve stem of the valve; and
a valve seat for the valve.

19. The motor vehicle of claim 18 , wherein the motor vehicle is a commercial vehicle.

Assignees

• Man Truck & Bus Ag

Inventors

• Schlee Dimitri

Classifications

• F01L3/22

  Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats · CPC title

• F01L3/20 Primary

  Shapes or constructions of valve members, not provided for in preceding subgroups of this group · CPC title

• F01L2820/01

  Absolute values · CPC title

• F16K1/38

  of conical shape · CPC title

• F01L3/08

  Valves guides; Sealing of valve stem, e.g. sealing by lubricant · CPC title