Patent ID: 7213558
Filing Date: 2007-05-08
Classification: F02B,F02M,Y02T

Abstract:
1. An intake device for an outboard motor internal combustion engine having a plurality of cylinders, the intake device comprising a plurality of main intake pipes, each main intake pipe having an upstream end and a downstream end, the downstream end communicating with a corresponding one of the cylinders, the upstream end connected to first and second branch pipes, each first branch pipe having a length greater than a length of each of the second branch pipes, each second branch pipe having a valve for selectively opening or closing the corresponding second branch pipe, a first surge tank, upstream ends of the first branch pipes opening into the first surge tank, a second surge tank formed separately from the first surge tank, upstream ends of a plurality of the second branch pipes opening into the second surge tank, each of the first and second surge tanks comprising an opening adapted to allow air to flow into the respective surge tank.