Patent ID: 7281380

Claim:
A heat exchange system comprising a first heat exchanger ( 11 ) that carries out heat exchange between exhaust gas of an internal combustion engine (E) and a heat medium flowing through a heat medium passage (W 3 ), and a second heat exchanger ( 92 ) that is disposed so as to be adjacent to the first heat exchanger ( 11 ), low temperature heat medium being supplied separately to the first and second heat exchangers ( 11 , 92 ); the first heat exchanger ( 11 ) having an exhaust gas passage ( 87 , 88 , 89 ) arranged so that the upstream side in the direction of flow of the exhaust gas is positioned on the radially inner side and the downstream side is positioned on the radially outer side, and having the heat medium passage (W 3 ) arranged so that the direction of flow of the heat medium is opposite to the direction of flow of the exhaust gas; and the second heat exchanger ( 92 ) having one side thereof facing a radially inner portion of the first heat exchanger ( 11 ) and the other side thereof facing the atmosphere, and being provided with a sensor ( 91 ) for detecting the condition of exhaust gas flowing through the exhaust gas passage ( 87 , 88 , 89 ) of the first heat exchanger ( 11 ).