Patent ID: 6405692
Filing Date: 2002-06-18
Classification: F02B,F02M,Y02T

Abstract:
An outboard motor, comprising:an internal combustion engine having a plurality of cylinders, each of said plurality of cylinders each having one of a plurality of pistons slidably disposed therein for reciprocal movement; a crankshaft driven by said plurality of pistons of said engine and supported within said engine for rotation about a vertical axis; a propulsor connected in torque transmitting relation with said crankshaft; an air conduit connected in fluid communication with said plurality of cylinders; a screw compressor having an inlet passage and an outlet passage, said outlet passage being connected in fluid communication with said air conduit, said screw compressor comprising a first screw rotor rotatable about a first rotor axis and a second screw rotor rotatable about a second rotor axis, said first and second rotor axes being parallel to said vertical axis; a bypass conduit connected in fluid communication with said outlet passage of said screw compressor; and a bypass valve disposed within said bypass conduit to control the flow of air from said outlet passage to said air conduit.