초록

An improved intake structure of an internal combustion engine intended to attain a reduction of weight and improve engine performance. A mounting flange and a surge tank are integrally formed as a manifold constituent, and branch pipes are formed separately from the manifold constituent.

대표청구항 ▼

[ What is claimed is:] [1.] An intake structure for a vehicle internal combustion engine provided with plural cylinders, said intake structure comprising:an elongate mounting flange adapted for securement to a side of the engine, said flange having at least four substantially parallel cylinder acces

[ What is claimed is:] [1.] An intake structure for a vehicle internal combustion engine provided with plural cylinders, said intake structure comprising:an elongate mounting flange adapted for securement to a side of the engine, said flange having at least four substantially parallel cylinder access openings extending therethrough in spaced relationship along an elongated direction thereof;a hollow surge tank positioned in adjacent but sidwardly spaced relation from said mounting flange, said surge tank being positioned centrally of said flange in said elongated direction and having outwardly facing opposite end walls each having first and second openings extending therethrough along directions which are substantially parallel with said elongated direction, said surge tank having a length parallel with said elongated direction which is substantially less than the length of said mounting flange;said cylinder access openings extending in parallel directions which are substantially perpendicular to the directions of the openings in said end walls of said surge tank;a support brace extending sidwardly between and rigidly connected to said surge tank and a central portion of said mounting flange;said mounting flange, said surge tank and said support brace being an integral one-piece monolithic manifold component having a generally T-shaped configuration;first and second branch pipes having respective one ends thereof connected to adjacent first and second said cylinder access openings disposed adjacent one end of said mounting flange and respective other ends thereof connected to said first and second openings in one said end wall of said surge tank which is closest to said first and second cylinder access openings;third and fourth branch pipes having respective one ends thereof connected to adjacent third and fourth said cylinder access openings disposed adjacent the other end of said mounting flange and respective other ends thereof connected to said first and second openings in said other end wall of said surge tank; andsaid first and second branch pipes being separable from said manifold component, and said third and fourth pipes also being separable from said manifold component and said first and second branch pipes.