Intake system for automotive engine

摘要

An improved induction system for an internal combustion engine 16 that improves power throughout the entire speed and load ranges by including two plenum chambers 52, 53, having separate intake passage that serve the cylinders 17 of the engine. One plenum chamber 52 and its intake passages 58 is designed to improve low and midrange performance while the other plenum chamber 53 and its intake passage 59 is tuned for high speed performance. An atmospheric air inlet 56 is provided only for the latter plenum chamber and the first mentioned plenum chamber receives its atmospheric air from this plenum chamber through a connecting passageway 60.