Patent ID: 6874467
Filing Date: 2005-04-05
Classification: F02D

Abstract:
1. A fuel delivery system for an internal combustion engine of the type having an intake manifold selectively fluidly connected to a combustion chamber and a bypass gas flow passageway having an inlet open to the intake manifold and an outlet open to the intake manifold downstream for the inlet, said system comprising: an electronically controlled throttle valve operatively disposed in the intake manifold, said electronically controlled throttle valve being movable between an open and a closed position in response to electronic signals to control air flow through the intake manifold, an idle speed control valve operatively disposed in the bypass gas flow passageway, said idle speed control valve being movable between an open and a closed position to control air flow through the bypass gas flow passageway, a fuel injector operatively positioned in the bypass gas flow passageway which, upon actuation in response to electronic signals, injects fuel into the bypass gas flow passageway, and a control system which generates electronic signals which controls the actuation of both said electronically controlled throttle valve and said idle speed control valve between their respective open and closed positions and also simultaneously controls actuation of said fuel injector in said bypass gas flow passageway.