Cooling structure for a cylinder head of an internal combustion engine

Patent metadata

Field	Value
Publication number	US-10094266-B2
Application number	US-201514974939-A
Country	US
Kind code	B2
Filing date	Dec 18, 2015
Priority date	Jan 2, 2015
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

A cooling structure (1) for a cylinder head (2) of an internal combustion engine includes a lower first cooling jacket (12) adjacent to a fire deck (13) and an upper second cooling jacket (14) adjacent to an intermediate deck (15), the first and second cooling jackets (12, 14) being flow connected by at least one transfer opening (27, 31) of the intermediate deck (15), the first cooling jacket (3) including at least one center cooling chamber (17) and an outer cooling chamber arrangement with at least one first outer cooling chamber (16), the outer cooling chamber (16) and the center cooling chamber (17) being flow connected by at least one exhaust side first radial passage (19) extending in a region of the exhaust valve bridge (8) and by at least one second radial passage (20, 21), the first radial passage (19) and the second radial passage (20, 21) being streamed hydraulically in parallel. The outer cooling chamber arrange-ment of the first cooling jacket (12) includes at least one first outer cooling chamber (16) and at least one second outer cooling chamber (29), which is separated from the first outer cooling chamber (16) by at least one flow restricting passage, whereas the second outer cooling chamber (29) is flow connected with the center cooling chamber (17) by at least one intake radial passage (24, 25, 26) extending in a region of an intake valve bridge (9) and/or in a region of an intake-exhaust valve bridge (10, 11).

First claim

The invention claimed is:

1. A cooling structure for a cylinder head of an internal combustion engine with at least two exhaust valves and at least one intake valve per cylinder, wherein at least one exhaust valve bridge is located between two adjacent exhaust valves and at least two intake-exhaust valve bridges are located each between an exhaust valve and an adjacent intake valve, the cooling structure comprising a lower first cooling jacket adjacent to a fire deck and an upper second cooling jacket adjacent to an intermediate deck, the first and second cooling jackets being flow connected by at least one transfer opening of the intermediate deck, the lower first cooling jacket including at least one centre cooling chamber and an outer cooling chamber arrangement with at least one first outer cooling chamber, the first outer cooling chamber and the centre cooling chamber being flow connected by at least one exhaust side first radial passage extending in a region of the exhaust valve bridge and by at least one second radial passage, wherein the first exhaust side radial passage and the second radial passage are streamed hydraulically in parallel, wherein the outer cooling chamber arrangement of the lower first cooling jacket comprises at least one first outer cooling chamber and at least one second outer cooling chamber, which is separated from the first outer cooling chamber by at least one flow-restricting passage comprising a solid interruption or a throttle point, wherein the second outer cooling chamber is flow connected with the centre cooling chamber by at least one radial passage extending in a region of the intake valve bridge and/or in a region of the intake-exhaust valve bridge, wherein the lower first cooling jacket includes at least one cooling manifold arrangement with at least one inlet cooling manifold which is flow connected to the first outer cooling chamber and at least one transfer cooling manifold which is flow connected to the second outer cooling chamber, wherein the inlet cooling manifold is separated from the transfer cooling manifold by at least one flow-restricting passage comprising a solid interruption or a throttle point.

2. The cooling structure according to claim 1 , wherein the first outer cooling chamber is arranged on the exhaust side and/or that the second outer cooling chamber is arranged on the intake side.

3. The cooling structure according to claim 1 , wherein the transfer cooling manifold surrounds the second outer cooling chamber as a circular ring segment.

4. The cooling structure according to claim 1 , wherein coolant enters the cooling structure through at least one coolant entrance opening located upstream of the at least one first and/or second radial passage and the at least one radial passage is located downstream of the first and/or second radial passage.

5. The cooling structure according to claim 1 , wherein the at least one first transfer opening originates from the centre cooling chamber ( 17 ).

6. The cooling structure according to claim 1 , wherein the at least one second transfer opening originates from the second outer cooling chamber or from the transfer cooling manifold.

7. The cooling structure according to claim 6 , wherein multiple second transfer openings originate from the second outer cooling chamber and/or from the transfer cooling manifold and/or from the region of second radial transfer passages flow connecting the second outer cooling chamber and the transfer cooling manifold.

8. The cooling structure according to claim 1 , wherein a flow section of a first transfer opening of the centre cooling chamber is smaller than a flow section of an at least one second transfer opening of the second outer cooling chamber or the transfer cooling manifold.

9. The cooling structure according to claim 1 , wherein the first outer cooling chamber is located between the inlet cooling manifold and the exhaust valves.

10. The cooling structure according to claim 1 , wherein the inlet cooling manifold is formed as a circular ring segment.

11. The cooling structure according to claim 1 , wherein at least one intake valve bridge is located between two adjacent intake valves.

12. The cooling structure according to claim 1 , wherein the exhaust valve comprises a valve seat which is surrounded by an annular cooling channel.

Assignees

• Avl List Gmbh

Inventors

• Poschl Robert
• Toth Robert

Classifications

• F01P3/16

  for cooling fuel injectors or sparking-plugs · CPC title

• F01P3/14 Primary

  for cooling intake or exhaust valves · CPC title

• F02F1/40 Primary

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

• F01P3/02

  Arrangements for cooling cylinders or cylinder heads · CPC title

• F02F1/4214

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