Misfuelling prevention device for a filler neck of a fuel tank

摘要

A misfuelling prevention device for a filler neck of a fuel tank includes a tubular element with an inflow side and an outflow side and a closure element, which, when in an open state, permits a flow of fuel through the outflow side, and, when in a closed state, prevents a flow of fuel through the outflow side. In a shell surface of the tubular element there is formed at least one opening which permits a flow of fuel from an inner side of the tubular element through to an outer side of the tubular element. The tubular element can be mounted such that at least a part of the shell surface in which the at least one opening is formed is arranged spaced apart from an inner surface of the filler neck such that fuel flowing through the at least one opening can flow via the filler neck into the fuel tank.

主权项

1. A misfuelling prevention device for a filler neck of a fuel tank, comprising:
a tubular element with an inflow side and an outflow side; a closure element that is mounted on the outflow side of the tubular element, the closure element, in an open state, permits a flow of fuel through the outflow side of the tubular element, and, in a closed state, the closure element obstructs a flow of fuel through the outflow side of the tubular element; a tubular actuating element that is arranged coaxially within the tubular element so as to be movable in a longitudinal direction of the tubular element, the tubular actuating element being configured to move the closure element into the opened state as a result of actuation by a discharge pipe of a fuel pump nozzle that is inserted into the tubular element; and a tubular locking element that is arranged coaxially within the tubular actuating element and has a smaller outside diameter than an inside diameter of the discharge pipe of the fuel pump nozzle, wherein the tubular element includes a lateral surface in which is formed at least one opening that permits a flow of fuel from an inside of the tubular element to an outside of the tubular element, wherein the tubular element is mountable in the filler neck of the fuel tank such that at least a portion of the lateral surface of the tubular element in which the at least one opening is formed is spaced apart from an inner surface of the filler neck such that fuel flowing through the at least one opening is adapted to flow through the filler neck into the fuel tank, wherein the tubular actuating element includes a lateral surface in which is formed at least one opening that permits a flow of fuel from an inside of the tubular actuating element to an outside of the tubular actuating element, and wherein the tubular locking element is attached to the tubular actuating element and the tubular locking element is movable in the longitudinal direction of the tubular element.