Cylinder Head for an Internal Combustion Engine

Patent metadata

Field	Value
Publication number	US-2016123271-A1
Application number	US-201414889735-A
Country	US
Kind code	A1
Filing date	Apr 24, 2014
Priority date	May 8, 2013
Publication date	May 5, 2016
Grant date	—

Abstract

The invention relates to a cylinder head ( 1 ) for an internal combustion engine having at least one cylinder, having at least one valve seat ring ( 3 ) for a lifting valve, wherein the valve seat ring ( 3 ) is surrounded by an annular cooling channel ( 4 ) for a coolant which is formed at least partially into the cylinder head ( 1 ), wherein the cooling channel ( 4 ) surrounds the valve seat ring at least partially and extends between at least one inlet ( 5, 15, 25 ) and at least one outlet ( 6 ). In order to reduce the valve wear, it is provided feat, as viewed in a section perpendicularly with respect to the axis ( 3 a ) of the valve seat ring ( 3 ), the cooling channel ( 4 ) has at least one preferably substantially crescent-shaped bulge ( 10 ) in the region of the inlet ( 5, 55, 25 ) and/or the outlet ( 6 ).

First claim

1 . A cylinder head for an internal combustion engine having at least one cylinder, having at least one valve seat ring for a lifting valve, wherein the valve seat ring is surrounded by an annular cooling channel for a coolant which is formed at least partially into the cylinder head, wherein the cooling channel at least partially surrounds the valve seat ring and extends between at least one inlet and at least one outlet wherein the cooling channel—as viewed in a section perpendicularly to the axis of the valve seat ring—has at least one budge in the region of the inlet and/or the outlet.

2 . The cylinder head according to claim 1 , wherein the bulge has an at least partially substantially circular segment shape.

3 . The cylinder head according to claim 1 , wherein the bulge is disposed asymmetrically in relation to a meridian plane (ε, δ) running through the centre of the inlet or outlet.

4 . The cylinder head according to claim 1 , wherein the radius r of the bulge in relation to the radius R of the cooling channel it holds that: 0.2·R<r<0.8·R.

5 . The cylinder head according to claim 1 , wherein at least one inlet opens at an angle β into the cooling channel, wherein the angle β between a central line of an inlet channel leading to this inlet and a tangent (t) to the cooling channel in the region of this inlet is spanned, wherein for the angle β it holds that: 0<β<90°.

6 . The cylinder head according to claim 5 , wherein at least one inlet opens radially into the cooling channel so that the angle is β=90°.

7 . The cylinder head according to claim 5 , wherein at least one inlet opens tangentially into the cooling channel so that the angle is β=0°.

8 . The cylinder head according to claim 5 , wherein at least one inlet opens obliquely into the cooling channel so that for the angle β it holds that: 0<β<90°.

9 . The cylinder head according to claim 1 , wherein an inlet is disposed diametrically to the outlet in relation to the axis of the valve seat ring.

10 . The cylinder head according to claim 1 , wherein at least one inlet is disposed on a first side of a meridian plane (δ) of the valve seat ring through the outlet facing an outlet valve bridge.

11 . The cylinder head according to claim 1 , wherein a plurality of inlets open into the cooling channel.

12 . The cylinder head according to claim 8 , wherein the central line of the inlet channel of an inlet opening obliquely into the cooling channel is disposed tangentially to a circle of curvature of a bulge of a further inlet.

13 . The cylinder head according to claim 1 , wherein at least two inlet channels so that the central lines thereof running through the respective inlets intersect at a point on a meridian plane (δ) of the valve seat ring through the outlet and/or at a point in the region of a cooling jacket of a component, which opens a combustion chamber.

14 . The cylinder head according to claim 1 , wherein the cooling channel of the valve seat ring is separate from the cooling system of the remaining cylinder head.

15 . The cylinder head according to claim 1 , wherein the bulge is substantially crescent-shaped.

16 . The cylinder head according to claim 2 , wherein the bulge can be produced by a turning tool.

17 . The cylinder head according to claim 1 , wherein for the radius r of the bulge in relation to the radius R of the cooling channel it holds that: 0.4·R<r<0.6·R.

18 . The cylinder head according to claim 9 , wherein the inlet is a radial inlet which opens radially into the cooling channel.

19 . The cylinder head according to claim 10 , wherein the inlet opens tangentially into the cooling channel and/or an inlet which opens obliquely into the cooling channel.

20 . The cylinder head according to claim 11 , wherein the inlets are arranged asymmetrically in relation to a meridian plane of the valve seat ring through the outlet.

21 . The cylinder head according to claim 12 , wherein the further inlet opens radially into the cooling channel.

22 . The cylinder head according to claim 13 , wherein the component is an injection device.

23 . The cylinder head according to claim 13 , wherein the component opens centrally into a combustion chamber.

Assignees

• Avl List Gmbh

Inventors

• Knollmayr Christof
• Zurk Andreas
• Pöschl Robert

Classifications

• F02M53/043

  with cooling means other than air cooling · CPC title

• F01P1/08 Primary

  for cooling intake or exhaust valves · CPC title

• F01L2820/02

  Formulas · CPC title

• F01P3/14 Primary

  for cooling intake or exhaust valves · CPC title

• F01L3/22

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