| 摘要 |
PROBLEM TO BE SOLVED: To provide an intake system structure of an internal combustion engine capable of avoiding collision of a foreign matter to a sensor while suppressing increase of a cost.SOLUTION: An upstream side boss (12a) and a downstream side boss (12b) for fixing an EGR valve (18) to an intake manifold (12) are formed on an upstream of an intake flow of a sensor part (13a) of an air-fuel ratio sensor (13) so as to be protruded in the intake manifold (12) and, further, cover the sensor part (13a) of the air-fuel ratio sensor (13) as a view of intake flow direction. |
