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    • 1. 发明授权
    • Exhaust gas purifying system for internal combustion engine
    • 内燃机排气净化系统
    • US6155044A
    • 2000-12-05
    • US146552
    • 1998-09-03
    • Hideo KaihoNoriyuki KishiShinichi KikuchiMitsuo Wakabayashi
    • Hideo KaihoNoriyuki KishiShinichi KikuchiMitsuo Wakabayashi
    • B01D53/86F01N1/08F01N3/02F01N3/08F01N3/10F01N3/20F01N3/24F01N13/08F01N3/00
    • F01N3/055F01N1/08F01N13/009F01N3/0814F01N3/2013F01N11/00Y02T10/22Y02T10/26
    • It is an object of the present invention to provide an exhaust gas purifying system for an internal combustion engine in which the rise of the temperature of an HC adsorbent is adequately retarded to improve the purification of HC at the start of the engine.In an exhaust system of the internal combustion engine, there are provided a three-way catalyst provided in the downstream side of an exhaust manifold, an adsorbent-catalyst provided under the floor of an automotive vehicle and containing at least zeolite in its composition, and a catalyst provided in the downstream side of the adsorbent-catalyst. In particular, the heat capacity of an exhaust gas passage which connects between the three-way catalyst and the adsorbent-catalyst is increased greater than the heat capacity of the exhaust manifold. More particularly, the thickness of a wall of the exhaust gas passage is greater than that of the exhaust manifold. A substrate, a partition, or a muffler is provided across the exhaust gas passage. The exhaust tube in the exhaust gas passage has at least an inner side or an outer side thereof shaped to a convex and concave configuration.
    • 本发明的目的是提供一种用于内燃机的排气净化系统,其中HC吸附剂的温度升高被充分地延迟以改善在发动机起动时HC的净化。 在内燃机的排气系统中,设置有设置在排气歧管的下游侧的三元催化剂,设置在机动车辆的底板下方的吸附催化剂,并且至少在其组成中含有沸石, 提供在吸附剂 - 催化剂的下游侧的催化剂。 特别地,连接在三元催化剂和吸附剂 - 催化剂之间的废气通道的热容量比排气歧管的热容增加。 更具体地,排气通道的壁的厚度大于排气歧管的壁厚。 在废气通道两端设置基板,隔板或消音器。 废气通道中的排气管至少具有形成为凸形和凹形构造的内侧或外侧。