Intake port device in internal-combustion engine

Abstract

Abstract PURPOSE:To prevent a spark plug from being fogged by liquid fuel, by providing an annular guide member for collecting liquid fuel in the direct upstream section of an intake port in a spark-ignition type internal combustion engine, and by forming, in a part of the guide member, a notch which leads fuel collected by the guide member in a direction toward a position other than the spark plug. CONSTITUTION:An intake valve 1 is openably disposed on a valve seat 11 formed in a combustion chamber 3, and is communicated with an intake port 2. In order to collect liquid fuel flowing down along the wall surface of the intake port 2 in a part upstream of the valve seat 11, an annular guide member 14 is provided in the upstream section of the valve seat. The annular member 14 is formed therein with a notch 16 which leads fuel collected in the guide member in a direction toward a position other than a spark plug 5 disposed in the combustion chamber 3. With this arrangement, it is possible to prevent liquid fuel flowing down the intake port from adhering to the spark plug so that no fogging occurs.

Inventors

• 👤 Kyugo Hamai
• 👤 浜井　九五
• 👤 Shigeru Kamegaya
• 👤 亀ケ谷　茂

Bibliographic Details