| 摘要 |
PURPOSE:To prevent contamination of carburetor and to reduce NOX by extending an exhaust recirculation path approximately in parallel while branching symmetrically from the downstream of the carburetor fixing position in intake manifold. CONSTITUTION:A combustion chamber is constructed with main combustion chamber 5 and sub-combustion chamber 9 communicated through an injection port 8 with main combustion chamber 5 while provided with an ignition plug. An exhaust recirculation path 36 for feeding exhaust recirculation gas is extended approximately in parallel along the side of intake manifold 20 while branched symmetrically in longitudinal direction of engine from the downstream position of carburetor fixing section in intake manifold 20 to communicate the leading end with main intake path 21 of intake manifold 20. Consequently, the carburetor is not contaminated by exhaust recirculation gas resulting in sufficient reduction of NOX. |
