| 摘要 |
PROBLEM TO BE SOLVED: To provide an intake passage structure of an internal combustion engine which can restrain an intake resistance increase. SOLUTION: In the intake passage structure of an internal combustion engine arranged a mesh shape member 3 in the downstream of a throttle valve, when the intake passage diameter of the upper stream of the throttle valve is called D1 , the intake air passage diameter at a position arranged the mesh shape member 3 is called D2 and the opening rate of the mesh shape member 3 is calledα, D1 <2> <=D2 <2> is assigned. In the intake passage structure of the internal combustion engine arranged the mesh shape member 3 in the downstream of the throttle valve, a clearance for passing one part of the intake air is provided between the mesh shape member 3 and the inner periphery surface of the intake pipe.
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