| 摘要 |
The invention relates to an exhaust gas cooler for an exhaust gas recirculation system, in particular of a motor vehicle, said exhaust gas recirculation system having a total cooling power (PG) and a total pressure loss coefficient (DG). The exhaust gas cooler comprises: at least one cooling portion (20, 20′) which has at least one cooling duct (22, 22′) and at least one additional duct (24, 24′); at least one bypass which bypasses at least one of the cooling portions (20, 20′); and an exhaust gas routing device (40) which has at least one closing member (42); wherein the cooling duct (22, 22′) has a first cooling power (P1) and a first pressure loss coefficient (D1), and the additional duct (24, 24′) has a second cooling power (P2) and a second pressure loss coefficient (D2). The first cooling power (P1) is greater than the second cooling power (P2), and/or the first pressure loss coefficient (D1) is greater than the second pressure loss coefficient (D2). The closing member (42) is suitable for at least nearly preventing exhaust gases from flowing through the additional duct (24, 24′) in order to increase the total cooling power (PG) and/or the total pressure loss coefficient (DG). |
