Supply device with built-in pipework

Supply device with built-in pipework for a system supplying an internal combustion engine with fuel by injection of the multipoint type, comprising an air intake distributor/manifold module including two moulded components fixed to one another, and one of which is a pipework casing having an air supply orifice, on which is arranged a butterfly body, and air outlet openings, formed in a flange for Joining to the other component, which is a base element having at least as many pipework branches as the engine has cylinders, and a flange for joining to the casing, which flange is fixed to the flange of the casing with interposition of a sealing gasket, and in which each branch opens out at one of its ends via an inlet opening, corresponding to one, respectively, of the outlet openings from the casing, to emerge in the latter, the pipework branches being secured via their other end to at least one fixing flange of the base element, which flange is equipped with means for fixing the built-in pipework on to the cylinder head of the engine, the pipework casing being designed so that it supports and/or encloses, at least partially, at least one sensor and/or at least one member for controlling an operating parameter of the engine and, for each cylinder of the engine, each corresponding injector being arranged between the casing and the base element of the module, wherein a fuel distribution rail is built into the casing which has, at each of the two ends of the rail, a tubular fitting for coupling the rail to a fuel supply pipe from a tank and to a pipe for returning the fuel to tank respectively, the casing having, between the two ends of the rail, and for each injector, at least one orifice in communication with the inside of the rail, for supplying the corresponding injector with fuel.