内燃机的气缸盖

Cylinder head for internal combustion engine

Abstract

One ends of an exhaust path 20 communicate with a plurality of combustion chambers 16 through exhaust ports 18, respectively, an assembling section 22 is provided on the other ends of the exhaust path 20, and a turbo supercharger 45, an exhaust tube 46 and an exhaust purification catalyst 47 are connected to the assembling section 22, on the other hand, a bypass path 52 communicating from the exhaust path 20 to the exhaust tube 46 and the exhaust purification catalyst 47 by bypassing a turbo supercharger 45 is provided and an exhaust control valve 53 capable of opening and closing the bypass path 52 is provided, and a bypass hole 62, which is a part of the bypass path 52, is provided in the cylinder head 11. In the cylinder head of the internal-combustion engine, catalyst warm-up performance is improved and a device is made compact-sized.
本发明的内燃机的气缸盖中,对于多个燃烧室(16),通过排气口(18)连通到排气通路(20)的一端部,在该排气通路(20)的另一端部设置集合部(22),在该集合部(22)连结涡轮增压器(45)、排气管(46)、排气净化催化剂(47),另一方面,设置有从排气通路(20)迂回涡轮增压器(45)而从排气管(46)连通到排气净化催化剂(47)的旁路通路(52),并且设置有能够开闭该旁路通路(52)的排气控制阀(53),在气缸盖(11)的内部设置成为旁路通路(52)一部分的旁路孔(62)。在内燃机的气缸盖中,改善催化剂暖机性能且实现装置的紧凑化。

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