| 摘要 |
PURPOSE:To facilitate the introduction of secondary air in a limited space by employing a lead valve. CONSTITUTION:The space 8 provided in the upper portion of the main body of a secondary-air introducing gasket produces the effect of a kind os surging room. When negative pressure is generated in an engine, external air passes through a secondary-air introducing hole 5 and, since a lead valve 10 is pushed up due to the difference between internal and external pressures, sucked into the engine with the aid of the effect of the room 8. when the internal pressure of the engine is higher than atmospheric pressure, the valve 10 closes the room 6 side of the hole 5. |
