ROTATABLE AIRFLOW CONTROL MECHANISM AND METHOD OF MANUFACTURING

摘要

A throttle valve for an induction system comprising adapted to control airflow including a throttle body defining a throttle bore, a throttle shaft traversing the throttle bore, a throttle plate located within the throttle bore fastened to the throttle shaft and adapted to rotate about an axis, and a non-metal portion flow restrictor. The flow restrictor is adapted to reduce off-idle airflow through the throttle valve.