•  This system flows jet air (high-velocity air) into the primary port.

•  Jet air is injected from the nozzle installed to the intake manifold, to blow off fuel adhering to the surface of the intake port.

•  A projection (anti-wet port) is provided on the bottom edge of the intake port. With this projection, air current is formed so that the air-fuel mixture blown off by jet air flows to the intake port efficiently, and ideal air-fuel mixture is obtained.

•  The air/fuel ratio is lean due to the facilitation of a slow air intake velocity and low load fuel mixture. As a result, fuel economy is improved.