Variable intake duct structure of engine

Abstract

A variable air intake duct structure controls an air amount supplied to each combustion chamber according to engine speed that is subdivided into various steps. The variable intake duct structure is for an engine having an air duct for controlling an air amount supplied to an engine and may include first, second, and third ducts. The air ducts may be selectively opened or closed according to engine speed.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2009-0112231 filed in the Korean Intellectual Property Office on November 19, 2009, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a variable air intake duct structure, and more particularly to a variable air intake duct structure capable of controlling the amount of air supplied to each combustion chamber according to engine speeds subdivided into different levels. Background technique [0004] Generally, in an air intake system for a vehicle internal combustion engine (hereinafter, simply referred to as "engine") mounted on a vehicle such as an automobile, the incoming air drawn through an air intake duct is filtered by an air filter in an air cleaner box. The cleaner element is filtered and supplied to the intake port of the engine. In addition, a plurality of duct...

AI Technical Summary

Problems solved by technology

[0007] Among these air intake systems, the disadvantages of the symmetrical type dual air intake system are increased manufacturing costs and increased weight, and limited space for designing the engine compartment

[0008] Also, for a single air intake system, its high engine output performance or NVH performance is not reliable

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