Gas distribution manifold in the cylinder head of an engine, with the recirculated exhaust gas mixture in a counter-flow to the admission gases

A gas distribution manifold in a cylinder head of a heat engine of a motor vehicle, the manifold comprising:

• a manifold housing comprising an input face for a flow of intake gas and an output face intended to open into the cylinder head of the engine, so as to allow a circulation of the flow of intake gas from upstream to downstream in the manifold housing, the manifold housing further comprising a heat exchanger disposed between an input face and an output face such that the flow of intake gas flows across the heat exchanger between the input face and the output face, and
• means for injecting a flow of recirculated exhaust gases from the engine into the flow of intake gas,
• wherein the injection means are configured so that the flow of recirculated exhaust gases is injected counter-current to the flow of intake gas.