Adjustable resonance pipes for internal combustion engine induction manifold

摘要

The adjustable air inlet system (1) is for an internal combustion engine. There are curved inlet branches (9) connected via an adjustable mechanism to a collection manifold (2). The adjustable mechanism includes extension pieces (10,11) with powered adjusting devices (17,18) using vacuum actuators (26,27). There is a gap (15) between two moving portions of pipe inside the fixed manifold suction pipe the outer diameter of the external pipe is increased in the region of this gap.