Eliminating maps from engine fueling control algorithms

David J. Stroh, Matthew A. Franchek, James M. Kerns

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Presented in this paper is an adaptive steady state fueling control system for spark ignition-internal combustion engines. Since the fueling control system is model based, the engine maps currently used in engine fueling control are eliminated. This proposed fueling control system is modular and can therefore accommodate changes in the engine sensor set such as replacing the mass-air flow sensor with a manifold air pressure sensor. The fueling algorithm can operate with either a switching type O2 sensor or a linear O2 sensor. The steady state fueling compensation utilizes a feedforward controller which determines the necessary fuel pulsewidth after a throttle transient to achieve stoichiometry. This feedforward controller is comprised of two nonlinear models capturing the steady state characteristics of the fueling process. These models are identified from an input-output testing procedure where the inputs are fuel pulsewidth and mass-air flow signal and the output is a lambda signal. These models are adapted via a recursive least squares method to accommodate product variability, engine aging, and changes in the operating environment. This proposed fueling control system is demonstrated on a Ford 4.6L V-8 fuel injected engine maintained at the Purdue Engine Research Facility/Engine Control Technology laboratory.

Original languageEnglish
Title of host publicationSAE Technical Papers
DOIs
StatePublished - Dec 1 2001
EventSAE 2001 World Congress - Detroit, MI, United States
Duration: Mar 5 2001Mar 8 2001

Other

OtherSAE 2001 World Congress
CountryUnited States
CityDetroit, MI
Period3/5/013/8/01

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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