Patent ID: 6571760
Filing Date: 2003-06-03
Classification: F02B,F02M,Y02T

Abstract:
An air inlet manifold for a multi-cylinder internal combustion engine, which air inlet manifold has a first end, an opposing second end, an air inlet at the first end, and a distribution chamber for air restricted by at least a first internal wall, comprising:a plurality of pipes for delivery of air to the cylinders, which pipes are distributed between the first end and the second end, each pipe comprises a pipe inlet, a pipe channel, which pipe channel is restricted by at least a second internal wall, which pipe inlet is described by a first surface with a first area restricted by a first line in the boundary between the pipe inlet and the first internal wall, which pipe channel in a first cross-section is described by a second surface with a second area restricted by a second line along the perimeter of the pipe channel, which first cross-section is generally perpendicular to the extension direction of the pipe channel wherein a first profile between the first line and the second line of said pipe located proximate to the air inlet has a different curvature than a second profile between the first line and the second line of said pipe located distant from the air inlet.