LEARN CORRECTION FEATURE FOR VIRTUAL FLEX FUEL SENSOR

摘要

A system for estimating fuel concentration comprises an ethanol estimating module that generates an ethanol estimate based on baseline closed loop corrections (CLC). A fuel system module controls fuel to an engine and generates a fuel system error. The ethanol estimating module selectively adjusts the baseline CLC and the ethanol estimate based on the fuel system error. A method for estimating fuel concentration comprises generating an ethanol estimate based on baseline closed loop corrections (CLC); controlling fuel to an engine and generating a fuel system error; and selectively adjusting said baseline CLC and said ethanol estimate based on said fuel system error.