A transport vehicle, in particular a railway vehicle for passenger transport, comprising: an air-conditioning system for conditioning the air inside the transport vehicle, said air-conditioning system having an absorption refrigeration machine for cooling the air inside the transport vehicle; an internal combustion engine for propelling the transport vehicle, said internal combustion engine being equipped with a fuel injection system; an exhaust line connected to the internal combustion engine for discharging hot exhaust gases from the internal combustion engine; wherein the absorption refrigeration machine is thermally connected to said exhaust line in order to use the heat of said hot exhaust gases for said cooling; and a heat measuring device for measuring the amount of heat in the exhaust gases; characterised by an engine fuel post-injection controller for controlling the post-injection of fuel into said engine, said engine fuel post-injection controller being adapted to: - receive a heat signal from said heat measuring device; - if the heat signal is below a predetermined threshold, which indicates that the heat from the exhaust gases is insufficient for the cooling needs of the absorption refrigeration machine, control said fuel injection system to post-inject an additional amount of fuel into the internal combustion engine, i.e. at the end of a combustion phase, thus increasing the heat from the exhaust gases above said predetermined threshold. an air-conditioning system for conditioning the air inside the transport vehicle, said air-conditioning system having an absorption refrigeration machine for cooling the air inside the transport vehicle; an internal combustion engine for propelling the transport vehicle, said internal combustion engine being equipped with a fuel injection system; an exhaust line connected to the internal combustion engine for discharging hot exhaust gases from the internal combustion engine; wherein the absorption refrigeration machine is thermally connected to said exhaust line in order to use the heat of said hot exhaust gases for said cooling; and a heat measuring device for measuring the amount of heat in the exhaust gases; characterised by an engine fuel post-injection controller for controlling the post-injection of fuel into said engine, said engine fuel post-injection controller being adapted to: - receive a heat signal from said heat measuring device; - if the heat signal is below a predetermined threshold, which indicates that the heat from the exhaust gases is insufficient for the cooling needs of the absorption refrigeration machine, control said fuel injection system to post-inject an additional amount of fuel into the internal combustion engine, i.e. at the end of a combustion phase, thus increasing the heat from the exhaust gases above said predetermined threshold. - receive a heat signal from said heat measuring device; - if the heat signal is below a predetermined threshold, which indicates that the heat from the exhaust gases is insufficient for the cooling needs of the absorption refrigeration machine, control said fuel injection system to post-inject an additional amount of fuel into the internal combustion engine, i.e. at the end of a combustion phase, thus increasing the heat from the exhaust gases above said predetermined threshold.