Patent ID: 8511077

Claim:
A system for controlling the temperature of a fluid additive for an exhaust system of an internal combustion engine in a motor vehicle, comprising a refrigerant circuit of a refrigerant system circulating a refrigerant therein and a heat exchanger configured for exchanging heat between the additive and the refrigerant circulating in the refrigerant circuit of the refrigerant system, the heat exchanger being configured for indirectly exchanging heat from the refrigerant via an intermediate circuit having an intermediate heat carrier medium, wherein the intermediate circuit is a constituent part of an engine coolant circuit having coolant circulating therein, and wherein the heat exchanger for the indirect exchange of heat via the intermediate circuit comprises a first and second partial heat exchanger with the first partial heat exchanger being located between the refrigerant circuit and the intermediate circuit and the second partial heat exchanger being located between the intermediate circuit and the additive, and wherein the refrigerant circuit is configured for operating in a heating mode comprising a compressor, the first partial heat exchanger, an expansion valve, an evaporator and a condenser.