Patent ID: 7007473

Claim:
An evaporator temperature control system that, in order to make the temperature of a gas-phase working medium generated by heating a liquid-phase working medium using exhaust gas of an engine (E) coincide with a target temperature, controls the supply of the liquid-phase working medium based on the flow rate of the exhaust gas, the temperature of the exhaust gas, the temperature of the liquid-phase working medium, and the temperature of the gas-phase working medium, the system comprising: fuel injection quantity detection means (S 5 ) for detecting a fuel injection quantity of the engine (E); air/fuel ratio detection means (S 6 ) for detecting an air/fuel ratio of the engine (E); and rotational speed detection means (S 7 ) for detecting a rotational speed of the engine (E); the exhaust gas flow rate being determined by calculation based on the fuel injection quantity, the air/fuel ratio, and the rotational speed.