| 发明名称 | Exhaust pipe | ||
| 摘要 | An exhaust pipe through which an exhaust port of an internal combustion engine and a catalyst for purifying an exhaust gas of the internal combustion engine are connected to each other includes a porous portion that is provided on at least a part of an inner peripheral face of the exhaust pipe. A thermal conductivity that the porous portion exhibits in a high temperature state where a temperature of the exhaust gas is as high as it is required to radiate a heat of the exhaust gas through the exhaust pipe is at least ten times higher than a thermal conductivity that the porous portion exhibits in a low temperature state where the temperature of the exhaust gas is as low as it is required to warm the catalyst up. | ||
| 申请公布号 | US8756925(B2) | 申请公布日期 | 2014.06.24 |
| 申请号 | US201113333678 | 申请日期 | 2011.12.21 |
| 申请人 | Toyota Jidosha Kabushiki Kaisha | 发明人 | Sasajima Takashi;Yamashita Hideo;Sawada Daisaku |
| 分类号 | F01N3/10 | 主分类号 | F01N3/10 |
| 代理机构 | Gifford, Krass, Sprinkle, Anderson & Citkowski, P.C. | 代理人 | Gifford, Krass, Sprinkle, Anderson & Citkowski, P.C. |
| 主权项 | 1. An exhaust pipe through which an exhaust port of an internal combustion engine and a catalyst for purifying an exhaust gas of the internal combustion engine are connected to each other, comprising: a porous portion that is provided on at least a part of an inner peripheral face of the exhaust pipe, wherein a thermal conductivity that the porous portion exhibits in a high temperature state where a temperature of the exhaust gas is as high as it is required to radiate a heat of the exhaust gas through the exhaust pipe is at least ten times higher than a thermal conductivity that the porous portion exhibits in a low temperature state where the temperature of the exhaust gas is as low as it is required to warm the catalyst up. | ||
| 地址 | Toyota-shi JP | ||