Patent ID: 6913068

Claim:
An engine exhaust heat recovering apparatus for providing a heat output through a heat transfer medium circulated by the action of a water pump across a cooling section of the engine and an exhaust heat exchanger which heat source is provided with the heat generated in the exhaust gas of the engine, comprising: an oil heat exchanger for heat exchange between the engine oil in the engine and the heat transfer medium, disposed between the cooling section of the engine and the exhaust heat exchanger, wherein the exhaust heat exchanger is disposed at an upstream side of the cooling section of the engine, the heat output is taken out with the heat transfer medium at a downstream side of the cooling section of the engine; and the temperature and/or the flow of the heat transfer medium is determined to maintain the temperature of water vapor in the exhaust gas to be not higher than the dew point during the operation in the heat exchanging action of the exhaust heat exchanger.