| 摘要 |
<p>This invention relates to an internal combustion engine, particularly for a motorcycle, comprising a cylinder with a combustion chamber defined therein, an intake passage arrangement for supplying intake air to said combustion chamber, and an exhaust passage arrangement for discharging combustion gas from said combustion chamber, a secondary air pipe arrangement for supplying air to said exhaust passage arrangement to clean said combustion gas, and valve means for opening and closing said secondary air pipe arrangement. The engine has been improved in that a portion of said secondary air pipe arrangement downstream of said valve means extends inclined downwards so as to drain condensates towards said exhaust passage arrangement. <MATH></p> |
