Spark-ignited reciprocating-piston internal-combustion engine with a pre-chamber ignition system

A spark-ignited reciprocating-piston internal-combustion engine, comprising:

• a pre-chamber ignition system;
• a cylinder head, wherein the pre-chamber ignition system is arranged within the cylinder head;
• and
• an ignition electrode configured for placement in a housing of the engine and for protruding into a cavity of a pre-chamber ignition system of the engine, wherein
• the pre-chamber ignition system comprises a pre-chamber ignition system housing comprising a metallic material including copper or a copper alloy, wherein
• the cavity is covered with a cover from a combustion chamber of the reciprocating-piston internal-combustion engine, wherein
• the cover includes at least one first aperture which connects the cavity and the combustion chamber to one another in gas-conducting manner, wherein
• a metallic cross-member with at least one second aperture, which connects opposing sides of the pre-chamber ignition system housing, is arranged in the cavity in a region of the ignition electrode, wherein
• the metallic cross-member includes a first metallic material in a central region of contact with the pre-chamber ignition system housing and a second metallic material in a region of contact with the pre-chamber ignition system housing, wherein the central region and the contact region are connected with a friction weld, and wherein
• the second metallic material is a same metallic material including copper or a copper alloy as the metallic material including copper or a copper alloy of the pre-chamber ignition system housing such that the second metallic material and the housing have a same thermal conductance to thereby prevent formation of gaps in the region of contact between the second metallic material and the housing.