Intake device for internal combustion engine, and outside gas distribution structure for internal combustion engine

Abstract

This intake device for an internal combustion engine is provided with: an intake device body including a plurality of intake pipes respectively connected to the cylinders of an internal combustion engine having cylinders numbering a multiple of three; and an outside gas distribution part for distributing an outside gas respectively to the plurality of intake pipes. The outside gas distribution part includes one first outside gas distribution pipe connected to an outside gas supply, second outside gas distribution pipes branching into multiple branches from the first outside gas distribution pipe, an outside gas collecting path for collecting outside gas from the plurality of second outside gas distribution pipes, and third outside gas distribution pipes branching into three branches from the outside gas collecting path, the third outside gas distribution pipes being respectively connected to the intake pipes.

Description

technical field [0001] The present invention relates to an air intake device of an internal combustion engine and an external air distribution structure of an internal combustion engine, in particular to an air intake device of an internal combustion engine and an external air distribution structure of an internal combustion engine formed to be connectable to an internal combustion engine having a multiple of three cylinders. Background technique [0002] Conventionally, an air intake device of an internal combustion engine formed to be connectable to an internal combustion engine having a number of cylinders that is a multiple of three is known. For example, Japanese Patent Application Laid-Open No. 2000-8968 discloses such an intake device for an internal combustion engine. [0003] Japanese Patent Application Laid-Open No. 2000-8968 discloses an exhaust gas recirculation device for an internal combustion engine in which a resin intake manifold is connected to an in-line t...

AI Technical Summary

Problems solved by technology

On the other hand, in an air intake device for an internal combustion engine having a multiple of 3 cylinders, there is a problem that only one EGR gas intake passage is branched into three from the collection chamber as in the structure described in Patent Document 1 above. cannot maintain high distribution accuracy of external air (EGR gas) like the conventional branch shape

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