Cylinder crankcase, procedure for manufacturing the cylinder bushings for the cylinder crankcase, and procedure for manufacturing the cylinder crankcase with these cylinder bushings

A procedure for manufacturing a cylinder bushing for a light metal cylinder crankcase for a combustion engine, the cylinder crankcase having casting material and cylinder bushings, each bushing having a running layer that forms a running surface and a rough external bonding layer for bonding the cylinder bushing to the cylinder crankcase while pouring the cylinder crankcase, wherein at least 60% of the bonding layer relative to the jacket surface of the bonding layer is connected with the casting material of the cylinder crankcase in a material tight manner, the procedure comprising:

• thermally spraying the running layer on a mandrel, the mandrel serving as molded part;
• and
• thermally spraying the bonding layer on the running layer, wherein the bonding layer is thermally sprayed in such a way that the bonding layer has an open porosity of at least 10% v/v.

A procedure for manufacturing a light metal cylinder crankcase for a combustion engine, the cylinder crankcase having at least one cylinder bushing having a running layer that forms a running surface and a rough external bonding layer for bonding the cylinder bushing to the cylinder crankcase while pouring a cylinder crankcase smelt, the cylinder bushing manufactured by thermally spraying the running layer on a mandrel serving as the molded part, wherein at least 60% of the bonding layer relative to the jacket surface of the bonding layer is connected with the casting material of the cylinder crankcase in a material tight manner, the procedure comprising thermally spraying the bonding layer on the running layer in such a way that the bonding layer has an open porosity of at least 10% v/v/;

• wherein the temperature of the smelt exceeds the melting point of the bonding layer while pouring the cylinder crankcase.