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CN101988445B 自适应EGR冷却系统 有权

自适应EGR冷却系统
摘要：
第一回路包含发动机冷却剂通道(28、30)和第一散热器(34)。第二回路包含第一EGR冷却器(48)。第三回路包含第二EGR冷却器(50)、第二散热器(36)、增压空气冷却器(26LP)、第一阀(66)以及第二阀(64)。阀(64)将进入入口(64A)的冷却剂流分配至并行流动路径，并行流动路径之一包括第二散热器(36)，而另一通道是散热器(36)周围的旁路。经分配的流汇成汇流至增压空气冷却器(26LP)的入口和阀(66)的第一入口(66B)二者。阀(66)具有与第二EGR冷却器(50)的入口连通的出口(66C)。阀(66)的第一状态对流向第二开口(66A)和入口(64A)两者的冷却剂关闭第二入口(66A)，同时对出口(66C)打开入口(66B)。阀(66)的第二状态对流向第二入口(66A)和阀(64)的入口(64A)的冷却剂打开第二入口(66A)，同时对阀(66)的出口(66C)关闭阀(66)的第一入口(66B)。
摘要（英）：

A first loop contains engine coolant passageways (28, 30) and a first radiator (34). A second loop contains a first EGR cooler (48). A third loop contains a second EGR cooler (50), a second radiator (36), a charge air cooler (26LP), a first valve (66), and a second valve (64). Valve (64) apportions coolant flow entering an inlet (64A) to parallel flow paths, one including second radiator (36) andthe other being a bypass around radiator (36). The apportioned flows merge into confluent flow to both an inlet of charge air cooler (26LP) and a first inlet (66B) of valve (66). Valve (66) has an outlet (66C) communicated to an inlet of second EGR cooler (50). The first condition of valve (66) closes a second inlet (66A) to coolant flowing toward both the second inlet (66A) and inlet (64A) whileopening inlet (66B) to outlet (66C). The second condition of valve (66) opens second inlet (66A) to coolant flowing toward second inlet (66A) and inlet (64A) of the valve (64) while closing first inlet (66B) of valve (66) to outlet (66C) of valve (66).

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