Patent ID: 8176889
Filing Date: 2012-05-15
Classification: F02M

Abstract:
1. An intake manifold for an engine, comprising: a plurality of intake distribution pipes arranged in a side-by-side relation to one another along one side wall; an intake inlet pipe provided in one end wall in a direction of arrangement of the intake distribution pipes; a surge chamber provided inside the intake manifold, and providing communication between the intake inlet pipe and the intake distribution pipes; and an intake guide wall provided integrally with the intake manifold, the intake guide wall extending in the direction of arrangement of the intake distribution pipes from an opening end of the intake inlet pipe, which is open to the surge chamber, to an intermediate portion of the surge chamber, and formed to guide the air, which has been introduced from the intake inlet pipe into the surge chamber, to a middle portion of the surge chamber, wherein one of opposite side surfaces of the intake guide wall is smooth-and-flat and is continuous to an inner surface of the intake inlet pipe, and the other side surface of the intake guide wall, which is on the side of the intake distribution pipes, includes a plurality of thinned concave parts and a plurality of ribs remaining between the concave parts, the ribs extending in a height direction of the intake guide wall.