Patent ID: 8171898

Claim:
A liquid-cooled internal combustion engine with a crankcase for several cylinders with a cooling jacket about cylinders in the crankcase, with individual cylinder heads with at least two cooling chambers arranged above one another in the cylinder head, with the cooling jacket of the crankcase and a bottom cooling chamber in the cylinder head being connected with each other via at least one transfer opening per cylinder which are evenly distributed on a circumference of the cylinder, with at least one inlet distributor chamber and/or at least one return collecting chamber for a coolant being arranged along at least one crankcase side wall, wherein the inlet distributor chamber is connected with the cooling jacket of the crankcase as a cylinder liner via at least one connecting duct per cylinder, and wherein an outside wall of the crankcase is curved in a convex manner to an outside in an area of the inlet distributor chamber and/or the return collecting chamber.