Cylinder liner for a cylinder crankcase
View Patent ↗A cylinder liner ( 2 ) for a cylinder block has a contouring ( 6 ) at one end. The contouring ( 6 ) serves to support the liner ( 2 ) on a sleeve ( 4 ) inside a die-casting tool. When the liner ( 2 ) is cast in, recesses ( 10 ) of the liner ( 2 ) are filled by the material of the cylinder crankcase whereby preventing the liner ( 2 ) from seating toward an oil chamber ( 14 ). The invention also relates to a method for producing a cylinder liner of the aforementioned type.
1. A cylinder sleeve for a cylinder crank case, wherein the cylinder sleeve ( 2 ) includes on one end ( 5 ) a contouring ( 6 ) having multiple recesses ( 10 ),
wherein at least one highest rise ( 8 ) of the contouring ( 6 ) supports the cylinder sleeve ( 2 ) in a pressure injection casting tool against a center sleeve ( 4 ).
2. The cylinder sleeve according to claim 1 , wherein the contouring ( 6 ) of the cylinder sleeve ( 2 ) corresponds to the negative shape of a contouring of a corresponding cylinder sleeve ( 3 ).
3. The cylinder sleeve according to claim 2 , wherein the contouring ( 6 ) of the cylinder sleeve ( 2 ) exhibits a phase displaced periodic symmetry with the contouring ( 7 ) of the corresponding cylinder sleeve ( 3 ).
4. The cylinder sleeve according to claim 1 , wherein a deepest recess ( 11 ) of the cylinder sleeve ( 2 ) extends to the lower bottom dead center ( 11 ) of a lower most piston ring.
5. A process for producing a cylinder sleeve for a cylinder crank case, comprising:
dividing out multiple sleeves ( 2 , 3 ) from a tube ( 20 ), wherein the dividing step includes
cutting a contouring ( 6 ) by using a cutting tool ( 22 ), wherein the cutting tool ( 22 ) moves axially relative to the tube ( 20 ) while the tube ( 20 ) moves circumferentially,
wherein the cylinder sleeve ( 2 ) includes on one end ( 5 ) a contouring ( 6 ), wherein at least one highest rise ( 3 ) of the contouring ( 6 ) supports the cylinder sleeve ( 2 ) in a pressure injection casting tool against a center sleeve ( 4 ).
6. The process according to claim 5 , wherein the cutting tool ( 22 ) is moved in the inside of the pipe ( 20 ) and the cutting process occurs from inside towards outside.
7. The process according to claim 5 , wherein the cutting process is carried out by water jet cutting, by laser cutting, by roll separation or precision cutting or stamping.
8. The process according to claim 5 , wherein during the cutting process a force (F) is applied against the pipe in both axial directions.