bearing face which in the installed position points essentially toward the engine and at least one second bearing face which in the installed position points essentially away from the engine and that the fastening portion is received in at least some portions between the bearing faces application_number US 47322806 A description in fig1 a fuel injection system is identified in its entirety by reference numeral 10 from a fuel collection container 12 the fuel reaches a high pressure pump 14 and from there a fuel reservoir 16 the fuel reservoir 16 communicates with fuel injection devices 18 of which only one of many fuel injection devices 18 is shown in fig1 the fuel injection device 18 is supplied with fuel through the fuel reservoir 16 and injects the fuel into a combustion chamber 20 shown schematically of an internal combustion engine 22 also only partly shown the fastening of the fuel reservoir 16 to the engine 22 of the prior art will be described in conjunction with fig2 through 4 in fig2 a fuel reservoir 16 and an engine 22 of the prior art are shown in section in the engine 22 a graduated installation space 24 is provided in which the fuel injection device 18 is received the fuel injection device protrudes with a nozzle 26 into the combustion chamber 20 on the end diametrically opposite the nozzle 26 the injector head 28 of the fuel injection device 18 is received in a high pressure chamber 30 embodied in the fuel reservoir 16 the injector head 28 is sealed off from the high.