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    • 99. 发明申请
    • ENGINE EXHAUST SYSTEM
    • 发动机排气系统
    • WO1996017158A1
    • 1996-06-06
    • PCT/GB1995002810
    • 1995-12-01
    • FORD MOTOR COMPANY LIMITEDFORD WERKE A.G.FORD FRANCE S.A.FORD MOTOR COMPANYMA, Thomas, Tsoi, Hei
    • FORD MOTOR COMPANY LIMITEDFORD WERKE A.G.FORD FRANCE S.A.FORD MOTOR COMPANY
    • F01N07/08
    • F02B37/18F01N13/08F01N13/10F01N13/14F02B37/02F02M26/14Y02T10/144
    • A multicylinder engine exhaust manifold system comprises a first manifold (24) having branches (22) leading from individual exhaust ports (20) of the engine to a downpipe (26), and a second manifold (34) for interconnecting the exhaust ports (20) and also having branches (32) leading to the individual exhaust ports (20) of the engine. The cross-sectional area of each branch (32) of the second manifold (34) facing the exhaust flow from the associated exhaust valve is no less than 25 % of the total port area and the branches of both manifolds (24, 34) terminate within the ports (20) in close proximity to the exhaust valves (18). In this way, a large proportion of the exhaust flow discharged from the exhaust valve of one cylinder is captured by the associated branch (32) of the second manifold (34) and distributed by the second manifold (34) to the exhaust ports (20) of adjacent cylinders where the exhaust valves (18) are closed and leave the exhaust ports (20) of the adjacent cylinders through the associated branches (22) of the first manifold (24), scouring the closed ends of the exhaust ports (20) in the process.
    • 多缸发动机排气歧管系统包括具有从发动机的各个排气口(20)引导到下水管(26)的分支(22)的第一歧管(24)和用于互连排气口(20)的第二歧管(34) )并且还具有通向发动机的各排气口(20)的分支(32)。 第二歧管(34)的与相关联的排气阀相对的排气流的每个分支(32)的横截面积不小于总端口面积的25%,并且两个歧管(24,34)的分支终止 在靠近排气门(18)的端口(20)内。 以这种方式,从一个气缸的排气阀排出的废气流的大部分被第二歧管34的相关联的分支(32)捕获,并由第二歧管(34)分配到排气口(20) ),其中排气门(18)关闭并且通过第一歧管(24)的相关联的分支(22)离开相邻气缸的排气口(20),冲洗排气口(20)的封闭端 ) 正在进行中。