Injector for gaseous or liquid fuel

Abstract

Injector for dispensing gaseous or liquid fuel, having a housing (1), in which a fuel chamber (5) which is fillable with the fuel is formed, and having a piston-type valve element (6), which interacts with a valve seat (7) to open and close a dispensing orifice (9) of the fuel chamber (5), wherein the valve element (6) is movable in an opening direction by an actuator (20), against the force of a closing spring (16). The valve element (6) is surrounded at least in sections by a corrugated bellows (11), which delimits a lubricant chamber (10), in which a lubricant (24) is present for lubricating the valve element (6). A compensating chamber (23) connected to the lubricant chamber (10) is formed in the housing (1), wherein the compensating chamber (23) is filled partly with the lubricant (24) and partly with a gas (25).

Dependencies are inferred from the claim text.