Control device for exhaust gas heat recovery of internal-combustion engine of motor vehicle, has electronic control unit controlling water pump to change exhaust heat recovery amount referred to engine energy output information

摘要

The device has an exhaust gas heat recovery device (19) accomplishing heat exchange between exhaust gas and a cooling agent of an internal-combustion engine (11) to recover exhaust gas heat. An electronic control unit (23) controls an electrical water pump (15) to change exhaust heat recovery amount referred to internal combustion engine energy output information. The control unit has a mechanism for accomplishing control of amount of exhaust gas heat recovery if threshold energy output of the internal combustion engine is less than or equal to a pre-determined value.