Patent ID: 7263983

Claim:
An exhaust gas recirculation device comprising: a housing that has an exhaust gas recirculation passage, through which a part of an exhaust gas of an internal-combustion engine is recirculated from an exhaust side to an intake side of the engine, wherein the housing includes: a mixing chamber, in which the exhaust gas that is recirculated from the exhaust gas recirculation passage is mixed into an intake air that is suctioned into the engine; and an air suction passage, from which the intake air flows into an interior of the mixing chamber, and which is formed on an upstream side of the mixing chamber in a direction of the intake air flow; a butterfly valve that is movably received in the housing to open and close the exhaust gas recirculation passage; a motor that generates driving force, which drives the butterfly valve, wherein the motor is placed adjacent to an inner wall surface of the air suction passage so that the motor is cooled by the intake air that flows through the air suction passage; and a valve driving device that opens and closes the butterfly valve, wherein: the butterfly valve includes a valve shaft that is rotated by the driving force of the motor; the butterfly valve is formed integrally with one axial end of the valve shaft; the valve driving device transmits the driving force of the motor to the valve shaft, and includes a speed reducing mechanism that reduces a rotational speed of the output shaft of the motor; and the motor, the speed reducing mechanism, and the valve shaft are placed adjacent to an inner wall surface of the air suction passage and are arranged one after another in a direction that is parallel to the flow direction of the intake air, which flows through the air suction passage.