Patent ID: 11898522
Assignee: HONDA MOTOR CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 17:
18. An intake manifold for an internal combustion engine, comprising:
a plenum including an inlet opening;
a plurality of runners, each of the runners extending from the plenum and including a first end opened to the plenum and a second end configured to be connected to the internal combustion engine, each of the runners including an outer surface; and
a plurality of ports, each of the ports opening into a respective one of the runners;
a perimeter wall protruding from the outer surface of the runners and surrounding the ports;
a bottom surface encircled by the perimeter wall and including,
a plurality of peaks, each of the peaks is formed by a portion of the outer surface of a respective one of the runners, and
a plurality of valleys, each of the valleys is located between a respective pair of the peaks;

a cover adjacent the perimeter wall and opposing the bottom surface, the cover including an inner surface; and
a plurality of projections protruding from one of the inner surface and the bottom surface, wherein
the peaks, the valleys, and the projections form a labyrinth that extends across a ventilation space bound by the bottom surface, the perimeter wall and the cover.