VALVE SEAT INSERT FOR A PISTON ENGINE

摘要

A valve seat insert (1) for a piston engine comprising a cooling duct (2) arranged inside the seat insert (1), an inlet port (3) for conveying cooling liquid to the cooling duct (2) and an outlet port (4) for discharging cooling liquid out of the cooling duct (2). The inlet port (3) and the outlet port (4) are arranged close to one another, and the cooling duct (2) is arranged between the inlet port (3) and the outlet port (4) so that it extends at least almost around the whole seat insert (1).