Patent ID: 7976073
Filing Date: 2011-07-12
Classification: F02M

Abstract:
1. A coupling device for hydraulically and mechanically coupling a fuel injector to a fuel rail of a combustion engine, the coupling device comprising: a fuel injector cup having a central longitudinal axis and being designed to be hydraulically coupled to the fuel rail and to engage a fuel inlet portion of the fuel injector, a first ring element being coupled to the fuel injector cup in a way to prevent a movement of the first ring element relative to the fuel injector cup in a direction of the central longitudinal axis and the first ring element comprising a first screw thread, a second ring element being coupled to the fuel injector, wherein snap rings are arranged on axially opposing ends of the second ring element and designed to enable positive fitting couplings between the snap rings and the fuel injector in an axial direction and designed to prevent a movement of the second ring element relative to the fuel injector in a direction of the central longitudinal axis and the second ring element comprising a second screw thread being in engagement with the first screw thread to retain the fuel injector in the fuel injector cup in a direction of the central longitudinal axis, wherein one of the ring elements is designed to be rotatable around the central longitudinal axis relative to the fuel injector and/or the fuel injector cup.