Cylinder head for an internal combustion engine

Patent metadata

Field	Value
Publication number	US-10655559-B2
Application number	US-201615570076-A
Country	US
Kind code	B2
Filing date	May 4, 2016
Priority date	May 7, 2015
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

The invention relates to a cylinder head (4) for an internal combustion engine having liquid cooling, comprising at least two outlet valves for controlling outlet openings (14) and at least one inlet valve for controlling at least one inlet opening (15) per cylinder (2), having at least one cooling jacket (3) through which coolant flows. An outlet valve bridge (7) is arranged between two adjacent outlet valves and an inlet/outlet valve bridge (8) is arranged in each case between at least one outlet valve and an adjacent inlet valve. A first cooling channel (18) is arranged in the region of at least one outlet valve bridge (7), and a second cooling channel (19) is arranged in the region of at least one inlet/outlet valve bridge (8), and the first and second cooling channels (18, 19) are fluidically connected to one other in a central cooling region (20) of the cylinder (2) with one another. According to the invention, in order to improve the cooling in the region of the inlet/outlet valve bridges and in the region of the outlet valve guides, at least one second cooling channel (19) has a flow dividing arrangement (21) which sub-divides the second cooling channel (19) into a first part-channel (19a) and a second part-channel (19b), wherein preferably the first part-channel (19a) is arranged in the region of an outlet valve guide (14a) and the second part-channel (19b) is arranged in the region of an outlet valve seat (14b) of the adjacent outlet valve.

First claim

The invention claimed is:

1. A cylinder head for an internal combustion engine having liquid cooling, the cylinder head comprising:
at least two outlet valves configured and arranged to control outlet openings;
at least one inlet valve configured and arranged to control at least one inlet opening per cylinder, the at least one inlet valve including at least one cooling jacket through which cooling medium flows;
an outlet valve bridge is arranged between the at least two adjacent outlet valves;
at least one inlet/outlet valve bridge is arranged between at least one outlet valve and an adjacent inlet valve;
a first cooling channel is arranged adjacent the at least one outlet valve bridge;
a second cooling channel is arranged adjacent the at least one inlet/outlet valve bridge, and the first and second cooling channels are flow-connected to one another about an outlet valve guide, the first and second cooling channels configured and arranged to improve cooling in proximity to the inlet-outlet valve bridge and the outlet valve guide; and
wherein the second cooling channel includes a flow-dividing device which subdivides the second cooling channel into a first partial channel and a second partial channel, each extending about a respective side of the outlet valve guide, and rejoining on a far side of the outlet valve guide.

2. The cylinder head according to claim 1 , further including at least one flow interruption device arranged diametrically opposite the first and/or second cooling channel with respect to at least one of the outlet openings.

3. The cylinder head according to claim 1 , wherein the first and second partial channels are merged both upstream and downstream of the flow-dividing device.

4. The cylinder head according to claim 1 , wherein the first partial channel and the second partial channel are merged adjacent the first cooling channel.

5. The cylinder head according to claim 1 , wherein the first partial channel and the second partial channel are merged adjacent a connecting channel of the at least one cooling jacket, the at least one cooling jacket is arranged adjacent a motor transverse plane between two adjacent cylinders and/or adjacent at least one end face of the cylinder head.

6. The cylinder head according to claim 5 , wherein a flow through the connecting channel connects two outlet-side cooling jacket sections and/or two inlet-side cooling jacket sections of the cooling jacket of two adjacent cylinders to each other.

7. The cylinder head according to claim 5 , wherein a flow through the connecting channel connects at least one outlet-side cooling jacket section of the at least one cooling jacket to an inlet-side cooling jacket section to each other.

8. The cylinder head according to claim 1 , further including an integrated coolant collecting channel extending at least over two cylinders and/or at least one integrated exhaust gas collector extending over at least two cylinders which is at least partly surrounded by an exhaust gas cooling jacket, and wherein the first cooling channel of each cylinder is connected to the coolant collecting channel and/or the exhaust gas cooling jacket.

9. The cylinder head according to claim 1 , wherein the first cooling channel and the second cooling channel together surround the outlet valve guide over an angular range between 180° and 300°.

10. The cylinder head according to claim 1 , wherein the flow-dividing device and/or the flow interruption device is formed by a cast wall section of the cylinder head.

11. The cylinder head according to claim 8 , wherein the first cooling channel of each cylinder is connected to the coolant collecting channel and/or the exhaust gas cooling jacket via at least one transfer channel.

12. The cylinder head according to claim 9 , wherein the first cooling channel and the first partial channel of the second cooling channel together surround the outlet valve guide over an angular range between 180° and 300°.

13. The cylinder head according to claim 9 , wherein the first cooling channel and the second cooling channel together surround the outlet valve guide over an angular range between 210° to 240°.

14. The cylinder head according to claim 13 , wherein the first cooling channel and the first partial channel of the second cooling channel together surround the outlet valve guide over an angular range between 210° to 240°.

15. The cylinder head according to claim 1 , wherein the first partial channel is arranged in the region of the outlet valve guide and the second partial channel is arranged in the region of an outlet valve seat of the adjacent outlet valve.

16. A cylinder head for an internal combustion engine having liquid cooling, the cylinder head comprising:
at least two outlet valves configured and arranged to control outlet openings;
at least one inlet valve configured and arranged to control at least one inlet opening per cylinder, the at least one inlet valve including at least one cooling jacket through which cooling medium flows;
an outlet valve bridge is arranged between two of the at least two adjacent outlet valves;
an inlet/outlet valve bridge is arranged between at least one outlet valve of the at least two outlet valves and an adjacent inlet valve of the at least one inlet valve;
and the first and second cooling channels are flow-connected to one another and configured and arranged to improve cooling in proximity to the inlet-outlet valve bridge and the outlet valve guide; and
and at least one flow interruption device is arranged diametrically opposite the first and/or second cooling channel with respect to one of the outlet openings.

17. The cylinder head according to claim 16 , wherein the second cooling channel includes a flow-dividing device which subdivides the second cooling channel into a first partial channel and a second partial channel.

18. The cylinder head according to claim 17 , wherein the first partial channel is arranged in the region of the outlet valve guide and the second partial channel is arranged in the region of an outlet valve seat of the adjacent outlet valve.

19. The cylinder head according to claim 16 , wherein the flow-dividing device and/or the flow interruption device is formed by a cast wall section of the cylinder head.

Assignees

• Avl List Gmbh

Inventors

• Knollmayr Christof

Classifications

• F01P3/02

  Arrangements for cooling cylinders or cylinder heads · CPC title

• F01P2003/024

  Cooling cylinder heads · CPC title

• F02F1/243

  Cylinder heads and inlet or exhaust manifolds integrally cast together · CPC title

• F02F1/4214

  specially adapted for four or more valves per cylinder · CPC title

• F02F1/40 Primary

  cylinder heads with means for directing, guiding, or distributing liquid stream · CPC title