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US 10,094,326 B2Granted
Cylinder head for an internal combustion engine
AssigneeAVL List GmbH
InventorRobert Pöschl
Life of this patent
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AssigneeAVL List GmbH
InventorRobert Pöschl
Estimating the term…
The invention relates to a cylinder head (1) for an internal combustion engine having at least one fire-face-side first cooling chamber (5a) and one second cooling chamber (5b), which adjoins the first cooling chamber (5a) in the axial direction of the cylinder, the first and second cooling chambers (5a, 5b) being separated from each other by means of an intermediate plate (7), a central receptacle (4) being arranged for an injection nozzle or ignition device for each cylinder (Z), and the first and second cooling chambers (5a, 5b) being flow-connected to each other in the region of the central receptacle (4); and having at least two, preferably four gas exchange valve openings (2, 3) per cylinder (Z), the first cooling chamber (5a) having a radial cooling duct (11, 12, 13, 14) in the region of at least one valve bridge (20, 21, 22, 23) between two gas exchange valve openings (2, 3). In order to improve the flow activity in disadvantaged flow regions in the simplest possible manner, the radial cooling duct (11, 12, 13, 14) has at least one reduction in cross section (15, 16, 17, 18) in a region lying radially outside the valve bridge (20, 21, 22, 23), said region preferably being further away from the cylinder axis (18) than the center (2a, 3a) of at least one gas exchange valve opening (2, 3).
A cylinder head for an internal combustion engine, comprising a first cooling chamber on a fire deck side and a second cooling chamber which adjoins the first cooling chamber in an axial direction of a cylinder, wherein the first and second cooling chambers are separated from each other by an intermediate deck, wherein a central receptacle is arranged for an injection nozzle or an ignition device for each cylinder, and wherein the first and the second cooling chambers are flow-connected to each other in a region of the central receptacle, and comprising at least two gas exchange valve openings per cylinder, wherein the first cooling chamber comprises a radial cooling duct in a region of a valve bridge between two gas exchange valve openings, and wherein the radial cooling duct comprises a protrusion which reduces a cross section of the radial cooling duct in a region situated radially outside the valve bridge, the protrusion in cross-section being located on a deck surface of the intermediate deck facing the first cooling chamber, and wherein the protrusion is formed by a finger-shaped rib.
Dependencies are inferred from the claim text.