Patent ID: 11959404
Assignee: MAHLE INTERNATIONAL GMBH
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 15:
16. An internal combustion engine, that is partly or completely operated with hydrogen as fuel gas, comprising:
a valve; and
a layer-sintered valve seat ring including at least two materials, the at least two materials including a function material for a tribological contact with the valve and a support material for the function material;
wherein the support material includes:
C: 0.5 to 1.8% by weight
Cr: 3 to 16% by weight
Mo: 1 to 5% by weight
W: 0.5 to 5.5% by weight
V: 0.4 to 4.0% by weight
Cu: 12 to 25% by weight
Fe: 41.3 to 82.6% by weight
Mn: up to 0.6% by weight
Si: up to 1.8% by weight
a remainder of production-related contamination in the form of at least one of Ni, Co, Ca, P, and S that are present in contents of <0.3% by weight each.