NOVELTY - The reformer system for the production of a hydrogen-containing gas for a fuel system in a motor vehicle, comprises an evaporator arrangement (12) fed with hydrocarbon and with mixing material for the production of hydrocarbon steam/mixture of material, and a reformer arrangement (14) with reformer catalyst material (40, 42) for the conversion of hydrocarbon steam/mixture of material to hydrogen containing gas. The reformer arrangement is surrounded by flow chamber for the mixing material. The flow chamber for mixing material is flow-throughable from a part of the mixing material.    USE - Useful for the production of a hydrogen-containing gas for a fuel system in a motor vehicle (claimed).    ADVANTAGE - The reformer system is simple in construction. In the reformer system, water content consisting of mixture of anode exhaust gas and air increases, thus the reforming efficiency is increased in the reaction chamber.    DETAILED DESCRIPTION - The reformer system for the production of a hydrogen-containing gas for a fuel system in a motor vehicle, comprises an evaporator arrangement (12) fed with hydrocarbon and with mixing material for the production of hydrocarbon steam/mixture of material, and a reformer arrangement (14) with reformer catalyst material (40, 42) for the conversion of hydrocarbon steam/mixture of material to hydrogen containing gas. The reformer arrangement is surrounded by flow chamber for the mixing material. The flow chamber for mixing material is flow-throughable from a part of the mixing material that can be introduced into the evaporator arrangement for the transfer of heat between the reformer arrangement and the mixing material. An ignition arrangement (52) is assigned to the flow chamber, for igniting and burning the mixing material through the flow chamber. A conveying device is intended for conveying air and anode exhaust gas from a fuel cell system as mixing material or mixing component through the flow chamber. An INDEPENDENT CLAIM is included for a method for the operation of a reformer system.    DESCRIPTION OF DRAWING(S) - The drawing shows a reformer system.    Evaporator arrangement (12)    Reformer arrangement (14)    Mixing chamber (26)    Reformer-catalyst material (40, 42)    Ignition arrangement. (52)