Patent ID: 7556010
Filing Date: 2009-07-07
Classification: F02B,F02M,Y02T

Abstract:
1. A multicylinder internal combustion engine comprising: an engine body having plural cylinders; an intake manifold having a header body disposed opposite to the engine body with respect to a direction parallel to cylinder axes of the cylinders and defining an intake chamber, and intake runners respectively defining intake runner passages branching off from the intake chamber of the header body and communicating with the cylinders; and a resonator defining a resonance chamber communicating with the intake chamber; wherein each of the intake runners has a downstream part joined to an intake joint on the engine body, and a bend extending away from the cylinder axes in a direction perpendicular to the cylinder axes, and curving so as to extend reversely toward the cylinder axes to connect to the downstream part; and wherein the resonator is disposed opposite to the engine body with respect to the intake manifold and is nearer to the cylinder axes than outermost end parts of the bends with respect to the direction perpendicular to the cylinder axes, wherein each of the intake runners has an upstream part connecting the bend to the header body, and at least a part of the resonator is formed integrally with the upstream parts opposite to the engine body with respect to the intake runners.