PURPOSE: To improve waste heat recovering rate and provide a compact engine by disposing a exhaust heat absorber and heat recovering radiator in a space between the engine and a engine cooling radiator device.
CONSTITUTION: When waste heat of an engine E is fully recovered, an engine cooling radiator device 6 is set to the radiation stopping condition. When a three-way valve 41 is changed over to a heat recovering circulation path 3, heat medium liquid in a water jacket 5 circulates through an exhaust heat absorber 2 → heat recovering radiator 4 → pump P so that heat of an engine body and exhaust is efficiently recovered by heat medium liquid 104. When the waste heat recovery is stopped to the contrary, the three-way valve 41 is changed over to an engine cooling circulation path 40. When the radiator device 6 is set to the radiating condition, the heat medium liquid is cooled by said device 6 so that the engine is not overheated. Since the exhaust heat recovering device 2, heat recovering radiator 4 and connecting piping can be compactly disposed in a space between the engine E and the radiating device 6, heat loss of circulation path and resistance of pipe line can be restrained small to improve waste heat recovering rate.
NISHITSUJI TAMOTSU
TAKAMATSU YOSHIMICHI
TABUSE SATOSHI
Next Patent: WASTE HEAT RECOVERING DEVICE FOR WATER COOLED ENGINE