Diffusion cone for the rear part of a jet engine incorporating a flame-holder ring at the trailing edge

A diffusion cone configured to internally delimit the inlet of an afterburner channel in a rear part of a turbojet engine, comprising an annular wall extending from a base while converging towards an opposite side where said annular wall forms a truncated tip of the diffusion cone defining an annular trailing edge of the latter, wherein the diffusion cone comprises a flame-holder ring with a cross-section comprising an external branch and an internal branch rigidly connected to each other on the base side and such that the external branch extends around the internal branch, whereby the external and internal branches delimit between them an internal space of the flame-holder ring emerging on the side opposite to the base of the diffusion cone, one of the external and internal branches consisting of said annular trailing edge, and the flame-holder ring including at least one fuel inlet arranged for admitting fuel into the internal space of the flame-holder ring.