EXHAUST LINE FOR A MOTOR VEHICLE WITH A CLOSED RECOVERY CYCLE FOR EXHAUST GAS HEAT ENERGY, AND ASSOCIATED CONTROL METHOD

摘要

The invention relates to an exhaust line for a motor vehicle, including: a heat exchanger, having a first side (49) for circulating exhaust gas and a second side (51) for circulating a heat exchange fluid; a closed recovery cycle for one part of the exhaust gas heat energy, in which said heat exchange fluid circulates, the second side (51) of the heat exchanger being placed inside the closed cycle; characterized in that the heat exchanger comprises an intermediate wall (47) arranged between the first and second sides (49, 51) of the heat exchanger (7), the intermediate wall (47) including at least one closed cavity (53) containing a phase change material, the intermediate wall (47) having a first exchange surface (55) in thermal contact with the exhaust gases, and a second exchange surface (57) in thermal contact with the heat exchange fluid.