Cylinder head for a water-cooled internal combustion engine

Claim 1

In a cylinder-head of a water-cooled internal combustion engine having two suspended intake and exhaust valves for each cylinder, of which one intake and one exhaust valve are diametrically opposite each other in relation to the cylinder axis, guide bushings for said intake and exhaust valves, two exhaust valve ducts merging into a common exhaust port, two cooling-water chambers, the first of which communicates with a cooling-water chamber of the associated cylinder via an inlet provided in the bottom of the cylinder-head, the second coolingwater chamber communicating with the first cooling-water chamber through radial ducts extending through webs formed between said intake and exhaust valves, the combination of the following features: the first cooling-water cHamber designed as an annular chamber surrounding said intake and exhaust valves together with said guide bushings; an overflow aperture provided in said first cooling-water chamber below said common exhaust port; said second cooling-water chamber comprising two sections; the first section of said second cooling-water chamber extending between said intake and exhaust valves and their guide bushings in an upward direction; the second section of said second cooling-water chamber adjoining said first section of same and designed as a duct extending above said common exhaust port as far as a coolingwater outlet of the cylinder-head.