Patent ID: 7942453

Claim:
A system, comprising: a fuel injector; and a coupling system for mechanically and hydraulically coupling the fuel injector to a fuel rail of a combustion engine, the fuel injector having a central longitudinal axis and an injection nozzle, the coupling system comprising: a fuel injector cup configured for hydraulic coupling to the fuel rail and for engaging a fuel inlet portion of the fuel injector, and a spring element of the fuel injector and configured for snap-in engagement with the fuel injector cup to retain the fuel injector in the fuel injector cup, the spring element flexing upon insertion of the fuel injector in the fuel injector cup and removal of the fuel injector from the fuel injector cup wherein at least a portion of the fuel injector is received between opposing portions of a circumferential inner side wall of the fuel injector cup; wherein the spring element is located radially between the fuel injector and the circumferential inner side wall of the fuel injector cup; wherein a gap is provided between the inner side wall of the fuel injector cup and the fuel injector that provides access to the spring element for manual manipulation of the spring element in order to remove the fuel injector from the fuel injector cup; wherein the fuel injector cup comprises a snap-in recess, and the spring element comprises a snap-in projection being designed to be received by the snap-in recess of the fuel injector cup to retain the fuel injector in the fuel injector cup in direction of the central longitudinal axis facing towards the injection nozzle; and wherein the snap-in projection comprises a leaf spring extending in radial direction.