Patent ID: 8015958

Claim:
An active intake manifold system comprising: at least one flap cartridge assembly having: a unitary cartridge housing including at least one flap valve housing having an airflow aperture therethrough connecting an inlet and outlet; and a flap valve rotatable in said aperture of said flap valve housing including at least one mounting ear having an aperture, said mounting ears secured to said flap valve, said flap valve rotatable between an open state and a closed state, wherein when in said closed state said flap valve substantially prevents airflow through said flap valve housing aperture, wherein said flap valves share a common axis of rotation; a shaft extending through said mounting ear apertures, said mounting ears rotationally locking said flap valves to change state in unison; and a plurality of air intake runners, each having a main runner portion splitting into a plurality of tracts of differing lengths, each tract tuned to a different predetermined engine speed and having a length and volume selected to optimize engine performance at said predetermined speed, each tract in air flow communication with a different flap valve housing outlet; wherein for said plurality of tracts of any one intake runner only one flap valve at a time is in said open state.