Patent ID: 7017556
Filing Date: 2006-03-28
Classification: F02D,F02P,Y02T

Abstract:
1. An engine startup fuel control system for use with an internal combustion engine of the type having at least one combustion chamber, an intake air passage fluidly connected each combustion chamber, a source of fuel, a crankshaft and a camshaft, said fuel control system comprising: a multipoint fuel injector associated with each combustion chamber, each multipoint fuel injector having an inlet connected to said fuel source and an outlet fluidly connected to said intake air passageway adjacent its associated combustion chamber, a crankshaft position sensor which generates an output signal representative of the angular position of the crankshaft, a camshaft position sensor which generates an output signal representative of the angular position of the camshaft, an engine control unit programmed to determine the synchronization of the engine in response to said output signals from said crankshaft position sensor and said camshaft position sensor, said engine control unit having outputs which control the activation of each said multipoint fuel injector, said engine control unit programmed to calculate the amount of fuel to achieve a predetermined air/fuel mixture for each cylinder and to vary the activation of each said multipoint fuel injector after the determination of engine synchronization after initiation of camshaft rotation to achieve said predetermined air/fuel mixture in each of said combustion chambers.