Method for injecting pressurized gaseous fuel in combustion chamber of e.g. diesel engine, involves applying gaseous fuel, and subjecting pressurized fuel in injector to relaxation causing endothermic reaction, so that injector is cooled

摘要

The method involves applying gaseous fuel (C) circulating in an injector (14) from an upstream inlet (18) to an injection tube (22) in a downstream opening of a combustion chamber (12). The pressurized fuel in the injector is subjected to a relaxation causing endothermic reaction, so that the injector is cooled, where the relaxation is caused by sudden variation of a section of a passage in which the fuel circulates. A return spring (36) is arranged in an interior face (I) of the injector and longitudinally compressed between radial surfaces of a body and a needle. An independent claim is also included for a fuel injector.