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    • 1. 发明授权
    • FLEX dual stage EGR cooling
    • FLEX双级EGR冷却
    • US08393314B2
    • 2013-03-12
    • US12577522
    • 2009-10-12
    • Bashar MelhemLuis Carlos CattaniMartin ZielkeRobert Rowells
    • Bashar MelhemLuis Carlos CattaniMartin ZielkeRobert Rowells
    • F02B47/08F02B33/44
    • F01P7/165F02B29/0406F02M26/05F02M26/24F02M26/32Y02T10/146
    • A circuit for cooling exhaust gas being recirculated through an EGR system (36) of an engine (10) from an exhaust system (20) successively through first and second heat exchangers (38, 40) to an intake system (16) for entrainment with intake air. Each heat exchanger has a respective coolant inlet through which liquid coolant enters and a respective coolant outlet through which liquid coolant exits after having absorbed heat from recirculated exhaust gas. The circuit has a third heat exchanger (32) to which coolant coming from the outlet of one of the first and second heat exchangers rejects heat, and parallel branches (84, 86) through which coolant enters the inlet of the other of the first and second heat exchangers. One of the parallel branches has a fourth heat exchanger (34) to which coolant flowing through that branch rejects heat, and one or more devices (50, 50A) for controlling the quantity of coolant flowing through each branch.
    • 一种用于冷却废气的回路,其通过来自排气系统(20)的发动机(10)的EGR系统(36)循环通过第一和第二热交换器(38,40)连续地进入到进气系统(16),用于夹带 进气。 每个热交换器具有相应的冷却剂入口,液体冷却剂通过该入口和相应的冷却剂出口,液体冷却剂在从再循环废气吸收热量后通过该冷却剂出口离开。 电路具有第三热交换器(32),来自第一和第二热交换器中的一个的出口的冷却剂从其中排出热量,以及平行的分支(84,86),冷却剂通过该分支(84,86)进入第一和第二热交换器中的另一个的入口, 第二热交换器。 一个并联分支具有第四热交换器(34),流经该分支的冷却剂流向该热交换器排出热量,以及用于控制流过每个分支的冷却剂量的一个或多个装置(50,50A)。