Patent ID: 6895904

Claim:
A system including an internal combustion engine comprising: a regenerator that accumulates heat from a heat medium and transfers heat to the heat medium; a circulation system that circulates the heat medium; a heat medium supply device, provided in line with the circulation system, that supplies the heat medium including heat accumulated by the regenerator to the circulation system; a heat exchanger that lowers the temperature of the heat medium; and a connecting restraint device that restrains circulation of the heat medium into the heat exchanger (a) when the heat medium is supplied by the heat supply device while the internal combustion engine is stopped and/or (b) when the internal combustion engine is under a cold condition, wherein the connecting restraint device includes a pressure-sensing valve, provided in line with the circulation system, which operates according to a difference in pressure between the pressures of the heat medium flowing before and after the connecting restraint device and thereby performs the restraint of the circulation of the heat medium into the heat exchanger.