Tribologically stressed structural element coated with diamond-like carbon and gas engine or internal combustion engine provided therewith

摘要

A tribologically stressed structural element (5), especially an injection needle, an injection valve or a component of an injection system of an internal combustion engine, is proposed. This has a surface region (20) which moves relative to a counter-member (6) during operation and consequently is tribologically stressed, which surface region (20) is provided with a first coating (21). This first coating (21) has a first layer (22) of diamond-like carbon with a hydrogen content of at least 30 atom %. In addition, a gas engine or an internal combustion engine operated with a dry gas, such as natural gas or hydrogen, as fuel or operated under oil-free and/or anhydrous combustion conditions is proposed which has such a tribologically stressed structural element.