Patent attributes
An air intake apparatus includes: an air intake apparatus body including first, second, third and fourth air intake passages respectively provided corresponding to first, second, third and fourth cylinders of a multi-cylinder engine which has one or a plurality of groups of four consecutive cylinders of the first, second, third and fourth cylinders, the multi-cylinder engine having an air intake sequence of the first cylinder, the third cylinder, the fourth cylinder, and the second cylinder; and a distribution passage through which external gas is distributed to the first, second, third and fourth air intake passages. The distribution passage includes an upstream distribution passage, first and second midstream distribution passages branched off from the upstream distribution passage, and first and second downstream distribution passages branched off from the first midstream distribution passage, and third and fourth downstream distribution passages branched off from the second midstream distribution passage.
