Gas stream flow guiding device for spark ignition engine, has conduit comprising in inner surface of its bent part, parallel ribs and/or slots, for assuring guiding of gas stream flow across conduit

摘要

The device has a conduit (1) comprising in an inner surface of its bent part (2), parallel ribs (6,7) and/or slots, for assuring guiding of gas stream flow across the conduit. The ribs and slots are regular and continuous, according to their length and/or their height or depth, at the right of the bent part.