公开(公告)号：US07448204B2

公开(公告)日：2008-11-11

申请号：US11311067

申请日：2005-12-19

申请人： Hidehiro Nishimura ,  Junichi Ooba ,  Osamu Takii

发明人： Hidehiro Nishimura ,  Junichi Ooba ,  Osamu Takii

IPC分类号： F01N3/00

CPC分类号： F01N3/30 ,  F01N3/22 ,  F01N13/009 ,  F01N2270/00 ,  F02B2075/027 ,  Y02T10/20

摘要： A four-cycle engine is provided that includes an exhaust port for releasing combusted gas from the engine and an exhaust system. The exhaust system includes an exhaust pipe coupled with the exhaust port, a first catalyst, a second catalyst, and a secondary air introduction pipe. The first catalyst is disposed in the exhaust pipe and the second catalyst is disposed in the exhaust pipe a set distance downstream of the first catalyst. The secondary air introduction pipe is configured to introduce air into the exhaust pipe. The secondary air induction pipe is connected to the exhaust pipe between the first and the second catalysts at a location where a temperature difference of the first and the second catalysts in a cold start transient phase is within a predetermined range.

摘要翻译： 提供一种四冲程发动机，其包括用于从发动机释放燃烧气体的排气口和排气系统。 排气系统包括与排气口连接的排气管，第一催化剂，第二催化剂和二次空气引入管。 第一催化剂设置在排气管中，第二催化剂在第一催化剂下游设置在排气管中。 二次空气导入管构成为将空气引入排气管。 在第一和第二催化剂之间的第二和第二催化剂的温度差在冷启动过程阶段的温度差在预定范围内的位置处，二次空气感应管连接到排气管。

公开(公告)号：US20060150617A1

公开(公告)日：2006-07-13

申请号：US11311067

申请日：2005-12-19

申请人： Hidehiro Nishimura ,  Junichi Ooba ,  Osamu Takii

发明人： Hidehiro Nishimura ,  Junichi Ooba ,  Osamu Takii

IPC分类号： F01N3/00 ,  F01N3/10

CPC分类号： F01N3/30 ,  F01N3/22 ,  F01N13/009 ,  F01N2270/00 ,  F02B2075/027 ,  Y02T10/20

摘要： A four-cycle engine is provided that includes an exhaust port for releasing combusted gas from the engine and an exhaust system. The exhaust system includes an exhaust pipe coupled with the exhaust port, a first catalyst, a second catalyst, and a secondary air introduction pipe. The first catalyst is disposed in the exhaust pipe and the second catalyst is disposed in the exhaust pipe a set distance downstream of the first catalyst. The secondary air introduction pipe is configured to introduce air into the exhaust pipe. The secondary air induction pipe is connected to the exhaust pipe between the first and the second catalysts at a location where a temperature difference of the first and the second catalysts in a cold start transient phase is within a predetermined range.

摘要翻译： 提供一种四冲程发动机，其包括用于从发动机释放燃烧气体的排气口和排气系统。 排气系统包括与排气口连接的排气管，第一催化剂，第二催化剂和二次空气引入管。 第一催化剂设置在排气管中，第二催化剂在第一催化剂下游设置在排气管中。 二次空气导入管构成为将空气引入排气管。 在第一和第二催化剂之间的第二和第二催化剂的温度差在冷启动过程阶段的温度差在预定范围内的位置处，二次空气感应管连接到排气管。