The present invention relates to a turbine engine fuel injection architecture, and to a combustion assembly comprising such an architecture. 5 STATE OF THE ART With reference to Fig. 1, a fuel injection architecture traditionally comprises at least two fuel injection manifolds 10A, 10B, each manifold may dispense a fuel flow to one or several fuel injectors (not shown). 10 The injectors associated with a given injection manifold are grouped according to their characteristics, like in particular their permeability or their injection technology. Each injection manifold is supplied with a fuel flow QA, QB, which is a fraction of a total fuel flow Q issued by a main fuel meter 12, which meters this flow from a 15 fuel source stemming from the fuel tank R of an aircraft in which the architecture is set up, the architecture being traditionally mounted on the engine, and the flow being extracted from the tank by one or several pumps (not shown). Indeed, the maximum acceptable flow rate in each manifold QAMax, QBMax is generally less than the maximum total fuel flow rate QMax issued from the main meter 12. 20 The fraction of the total flow dispensed at each injection manifold is, as for it, set by a distribution meter 11, positioned between the main fuel meter 12 and the manifolds 10A, 10B. The distribution meter thus dispenses the total fuel flow between two or more manifolds, according to a determined distribution law. 25 In the example of Fig. 1, the architecture only comprises two fuel injection manifolds and the distribution meter dispenses the total flow among both manifolds in two metered flow rates QA and QB such that QA+QB=Q. In Fig. 2a, an exemplary fuel distribution law is illustrated between the manifolds 10A and 10B, depending on a total flow rate set value sent to the main 30 meter 12. In this non–limiting example, for a total flow rate of less than a threshold value Qs, which preferably is less than or equal to the maximum acceptable flow rate in the manifold 10A QAMax, the totality of the flow rate is dispensed to the manifold A 3 for giving preference to this manifold (for example for promoting the use of the type of injectors associated with the manifold A). One therefore has the relationship: for 0