Patent ID: 6508234
Filing Date: 2003-01-21
Classification: F02D,F02M,Y02T

Abstract:
A fuel injection control system for an engine comprising:a throttle valve; at least one upstream injection valve being disposed in an upstream position with respect to the throttle valve; at least one downstream injection valve being disposed in a downstream position with respect to the throttle valve; means for calculating a required fuel amount for a predetermined calculation cycle and calculating actual fuel amounts to be injected during a fuel injection process from the upstream injection valve and the downstream injection valve on the basis of the required fuel amount; and means for calculating, after said fuel injection process, a lack of fuel amount immediately before recalculating a recalculated required fuel amount at the calculation cycle coming at the end of an intake stroke, said lack of fuel amount being calculated by subtracting said required and said actual fuel amounts from the recalculated required fuel amount.