Patent ID: 6151892
Filing Date: 2000-11-28
Classification: F02B,Y02T

Abstract:
An apparatus for improving the operation of an internal combustion engine of an outboard motor, comprising:an exhaust system having an exhaust pipe;a water pump for pumping water through a first conduit;an adapter plate member attached to said internal combustion engine, said exhaust pipe extending through said adapter plate member, said first conduit extending through said adapter plate member;a second conduit connected in fluid communication between said first conduit and said exhaust system, said second conduit being contained within said adapter plate member;an electrically controlled valve connected to said second conduit for selectively allowing water to pass through said second conduit from said first conduit to said exhaust system;an engine control unit comprising a microprocessor connected in signal communication with said electrically controlled valve;an RPM measuring sensor providing a first signal output; anda first input of said microprocessor connected in signal communication with said first signal output of said RPM measuring sensor, said microprocessor controlling the degree to which said electrically controlled valve allows water to pass through said second conduit from said first conduit to said exhaust system as a function of the RPM of said internal combustion engine.