Patent ID: 7216638
Filing Date: 2007-05-15
Classification: F02D,F02M,Y02T

Abstract:
1. A method for operating a marine engine, comprising the steps of: providing a first valve disposed upstream from a first cylinder of said engine, said first valve being connected in fluid communication between said first cylinder and a source of air; providing a second valve disposed upstream from a second cylinder of said engine, said second valve being connected in fluid communication between said second cylinder and said source of air; providing a sensor disposed downstream from said first and second cylinders, said sensor providing an output signal which is representative of an exhaust gas characteristic; measuring said exhaust gas characteristic; and controlling a first magnitude of a first flow of air through said first valve and a second magnitude of a second flow of air through said second valve in accordance with said exhaust gas characteristic and in accordance with a predetermined relationship between said first and second magnitudes.