Granted Patent B2

US 12,655,778 · App. 15/810,905 · Granted Jun 16, 2026

Inventor: Georg Litzel (Dinkelscherben, DE)

Assignee: EVERLLENCE SE

F01L3/08F01L3/02F01L3/22

Abstract

Claims (28)

1 . A gas exchange valve comprising:

a valve body;

a valve stem carrying the valve body;

a valve seat configured to mate with the valve body, wherein a closed gas exchange valve has the valve body in contact with the valve seat and an opened gas exchange valve does not have the valve body in contact with the valve seat;

a valve guide arranged in and flush with a bore in a cylinder head and coaxially surrounding the valve stem such that a substantially constant radial gap is defined between the valve guide and the valve stem, the valve guide configured to guide the valve stem and having a radially inner groove, wherein the radially inner groove is arranged axially spaced apart from a first end of the valve guide facing the valve seat, wherein the first end of the valve guide is perpendicular to the bore in the cylinder head, and wherein an outer surface of the valve guide directly faces the cylinder head and an inner surface of the valve guide, except the radially inner groove, directly faces the valve stem; and

a separate wiping element for the valve stem having a substantially rectangular cross section, which comprises a metallic material, arranged in and axially bounded by the radially inner groove of the valve guide, wherein the separate wiping element is received directly in the radially inner groove such that an outer surface of the separate wiping element directly faces the valve guide at the radially inner groove and an inner surface of the separate wiping element directly faces the valve stem.

2 . The gas exchange valve according to claim 1 , wherein the separate wiping element projects radially inward relative to the radially inner groove.

3 . The gas exchange valve according to claim 1 , wherein the separate wiping element is aligned concentrically with respect to the valve stem.

4 . The gas exchange valve according to claim 1 , wherein the radially inner groove fixes the separate wiping element for the valve stem in the radially inner groove as seen in a movement direction of the valve stem.

5 . The gas exchange valve according to claim 1 , wherein the metallic material of the separate wiping element has a lower hardness than a metallic material of the valve stem.

6 . An internal combustion engine comprising:

at least one cylinder;

at least one inlet-side gas exchange valve for charge air; and

at least one exhaust-side gas exchange valve for exhaust gas,

wherein at least one of the at least one inlet-side gas exchange valve and the at least one exhaust-side gas exchange valve comprises:

a valve body;

a valve stem carrying the valve body;

a valve seat configured to mate with the valve body, wherein a closed gas exchange valve has the valve body in contact with the valve seat and an opened gas exchange valve does not have the valve body in contact with the valve seat;

a valve guide arranged in and flush with a bore in a cylinder head and coaxially surrounding the valve stem such that a substantially constant radial gap is defined between the valve guide and the valve stem, the valve guide configured to guide the valve stem and having a radially inner groove, wherein the radially inner groove is arranged axially spaced apart from a first end of the valve guide facing the valve seat, wherein the first end of the valve guide is perpendicular to the bore in the cylinder head, and wherein an outer surface of the valve guide directly faces the cylinder head and an inner surface of the valve guide, except the radially inner groove, directly faces the valve stem; and

a separate wiping element for the valve stem having a substantially rectangular cross section, which comprises a metallic material, arranged in and axially bounded by the radially inner groove of the valve guide, wherein the separate wiping element is received directly in the radially inner groove such that an outer surface of the separate wiping element directly faces the valve guide at the radially inner groove and an inner surface of the separate wiping element directly faces the valve stem.

7 . The internal combustion engine according to claim 6 , wherein the internal combustion engine is configured for operation with heavy fuel oil.

8 . The internal combustion engine according to claim 6 , wherein the internal combustion engine is for a ship.

9 . The gas exchange valve according to claim 2 , wherein the separate wiping element is aligned concentrically with respect to the valve stem.

10 . The gas exchange valve according to claim 1 , wherein the valve seat is a separate valve seat ring arranged in the cylinder head.

11 . The gas exchange valve according to claim 1 , wherein an entire port side of the valve guide is flush with a surrounding port surface of the cylinder head.

12 . The internal combustion engine according to claim 6 , wherein an entire port side of the valve guide is flush with a surrounding port surface of the cylinder head.

13 . The gas exchange valve according to claim 1 , wherein a first distance between the separate wiping element and the first end of the valve guide is less than a second distance between the separate wiping element and a second end of the valve guide that is opposite the first end of the valve guide.

14 . The internal combustion engine according to claim 6 , wherein a first distance between the separate wiping element and the first end of the valve guide is less than a second distance between the separate wiping element and a second end of the valve guide that is opposite the first end of the valve guide.

Assignments (3)

Priority Claims (1)

Continuity (1)

References Cited (67)