Patent ID: 8398328

Claim:
A fuel injection assembly comprising: a fuel injector having a housing with a fluid inlet end; a pipe of a fluid supply system; and a coupling arrangement comprising a supporting element, a connection element and a spring, wherein the connecting element and the supporting element each comprise a fluid inlet opening at an axial end and a recess with a fluid outlet opening, wherein the fluid inlet opening of the connection element is hydraulically coupled to the pipe, the fluid inlet opening of the supporting element is arranged in the recess of the connection element to provide a sealed connection, and the fluid inlet end of the fuel injector is received in the recess of the supporting element to provide a sealed connection so that the fuel injection assembly defines a sealed passage operable to supply fluid from the pipe to the fuel injector via the connection element and the supporting element, wherein the supporting element, the connecting element, and the fuel injector housing are physically distinct and separate components arranged between, and physically distinct and separate from, an engine head and the pipe, wherein the supporting element is cylindrical having a center axis and is in contact with the housing at a first axial end area of the supporting element so that it is operable to transfer a force to the housing at least in one direction along the center axis, wherein the supporting element comprises at least a first protrusion and the connecting element comprises at least a second protrusion, the spring being arranged and configured such that a first axial end rests on the first protrusion of the supporting element and a second axial end rests on the second protrusion of the connecting element, wherein the spring is compressed between the first protrusion and the second protrusion for providing an axial force along the center axis of the supporting element at the first axial end area of the supporting element, so that the connecting element is operable to bias the fuel injector housing in a first axial direction by means of interaction with the first axial end area of the supporting element for compressing the fuel injector housing against the physically distinct and separate engine head in the first axial direction, and wherein the housing is rotatably coupled with the supporting element at the first axial end area.