| 摘要 |
This exhaust gas recirculation device is equipped with: an EGR path (5) for recirculating a portion of an exhaust gas, which flows in an exhaust path (3) of an internal combustion engine (1), into an air intake path (2) of the internal combustion engine (1) as an EGR gas; a cooling medium circuit (6) in which a cooling medium flows; an EGR cooler (52) for cooling the EGR gas by causing the EGR gas flowing in the EGR path (5) to engage in heat exchange with the cooling medium flowing in the cooling medium circuit (6); and an intercooler (21) that is provided on the downstream side, in the flow direction of the intake air, of a junction part (A) between the air intake path (2) and the EGR path (5), and cools the intake air by causing the EGR-gas-containing intake air flowing in the air intake path (2) to engage in heat exchange with the cooling medium flowing in the cooling medium circuit (6). The cooling medium circuit (6) is constructed independently of cooling water circuits (10, 13) for cooling water for cooling the internal combustion engine (1) to flow therein, and is configured such that the cooling medium that has passed the EGR cooler (52) flows into the intercooler (21) at least during a low-load operation of the internal combustion engine (1). |
