Patent ID: 7066139

Claim:
An intake port of a lean burn engine, comprising: a connecting part formed at a predetermined location of a linear port and swirl port along a longitudinal direction for providing fuel injected from an injector, wherein said linear port and swirl port are separated from each other except at said connecting part, and wherein said connecting part comprises: two cylinders branching from a circle toward said linear port and said swirl port at a constant angle, wherein said cylinders meet at said single circle where said injector is installed; and expanded parts formed around said cylinders, wherein said expanded parts are: formed to expand the sectional area of said cylinders at a connection portion with said linear port and swirl port, wherein said cylinders connect with both said linear port and said swirl port; and formed between an acute angle of said cylinder and said linear port and between an acute angle of said cylinder and said swirl port, wherein said expanded parts include surfaces facing each other between said linear port and said swirl port, wherein said surfaces are configured to be widened for more than or equal to about five degrees, respectively from a central surface between said linear port and said swirl port.