Patent ID: 8171917
Filing Date: 2012-05-08
Classification: F02M

Abstract:
1. A coupling device for hydraulically and mechanically coupling an injection valve to a fuel rail of a combustion engine, wherein the injection valve has a valve body and a fuel inlet tube being partially arranged in the valve body, 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 at least partially being in engagement with the fuel inlet tube, the fuel injector cup comprising an inner bottom surface located beyond the axial end of the fuel inlet tube in an upstream direction of fuel flow and facing the injection valve, a first retaining element being fixedly coupled to the fuel injector cup, a second retaining element being fixedly coupled to the injection valve, the second retaining element being coupled to the first retaining element to prevent a movement of the second retaining element relative to the first retaining element in a first direction of the central longitudinal axis, the second retaining element physically preventing a movement of the injection valve in the first direction to retain the injection valve in the fuel injector cup, and a damper element being arranged axially between an axial end of the fuel inlet tube and the inner bottom surface of the fuel injector cup located beyond the axial end of the fuel inlet tube in the upstream direction of fuel flow, the damper element being designed to limit a movement of the injection valve relative to the fuel injector cup in a second direction of the central longitudinal axis opposing the first direction.