Patent ID: 6257205
Filing Date: 2001-07-10
Classification: F02D

Abstract:
A system for controlling a fuel injector in accordance with an injection control strategy for an internal combustion engine including a controller in communication with a current driver connected to the injector, the controller commanding injection by generating a command signal, the current driver being connected to a sensing element that provides an injector signal indicative of the injector current, the system comprising:a comparator circuit that receives and compares the injector signal to a plurality of threshold signals and provides a plurality of output signals based on the comparisons;a logic circuit receiving the plurality of output signals, and processing the plurality of output signals to produce a plurality of control signals including a drive signal that is fed to the current driver; andcontrol logic configured to receive at least one of the control signals and to process the at least one control signal to determine an injection timing signal, the injection timing signal being provided to the controller and allowing the injection control strategy to be modified by the controller based on the injection timing signal.