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).
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机译：用于排气再循环系统的排气冷却器技术领域本发明涉及一种用于尤其是机动车的排气再循环系统的排气冷却器，所述排气再循环系统具有总冷却功率（P G ）和总压力损失系数（P）。 D G ）。废气冷却器包括：至少一个冷却部分（ 20、20'），其具有至少一个冷却管道（ 22、22'）和至少一个附加管道（ 24，24′）;至少一个旁路，其绕过至少一个冷却部分（ 20、20'）;排气路径装置（ 40 ），其具有至少一个关闭部件（ 42 ）;其中，冷却管道（ 22、22'）具有第一冷却功率（P 1 ）和第一压力损失系数（D 1 ） ，并且附加管道（ 24，24'）具有第二冷却功率（P 2 ）和第二压力损失系数（D 2 ）。第一冷却功率（P 1 ）大于第二冷却功率（P 2 ）和/或第一压力损失系数（D 1 ）大于第二压力损失系数（D 2 ）。闭合部件（ 42 ）适用于至少几乎防止废气流过附加管道（ 24、24'），以提高总冷却功率（< P G ）和/或总压力损失系数（D G ）。
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