Cooling duct piston and method for producing the same

摘要

A cooling duct piston (1) for combustion engines. The cooling duct piston has a piston basic body (2) that is connected to a lining part (3), which is facing an assigned combustion chamber. Here, the lining part (3) completely forms the piston surface (4) of the cooling duct piston (1) that faces the combustion chamber. An encircling depression (5) is provided in the surface of the piston basic body (2) facing the combustion chamber. The lining part (3) provides a permanent connection at least with the surface of the piston basic body (2) facing the combustion chamber, and thus bridges the encircling depression (5), such that the encircling depression (5), with the lining part (3) that bridges it, forms a cooling duct (6).

主权项

1. A cooling duct piston (1) for combustion engines, having a piston basic body (2) that is connected to a lining part (3), which lining part (3) faces an assigned combustion chamber,
wherein the lining part (3) completely forms the piston surface (4) of the cooling duct piston (1) facing the combustion chamber, wherein an encircling depression (5) is provided in the surface of the piston basic body (2) facing the combustion chamber, wherein the lining part (3) provides a permanent connection at least to the surface of the piston basic body (2) facing the combustion chamber, thereby bridging the encircling depression (5), such that the circling depression (5), with the lining part (3) that bridges it, forms a cooling duct (6), and wherein the material of the lining part (3) has a higher level of heat conductivity than the material of the piston basic body (2) and is a ferritic steel, aluminium, or an aluminium alloy and the material of the piston basic body (2) is a Fe—Cr—Ni austentic steel.