This content is not included in your SAE MOBILUS subscription, or you are not logged in.
The Effects of Various Engine Control System Malfunctions on Exhaust Emissions Levels During the EPA I/M 240 Cycle
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 01, 1994 by SAE International in United States
Annotation ability available
Ensuring the reliable operation of the emissions control system is a critical factor in complying with increasingly stringent exhaust emissions standards. In spite of significant advances, the performance of available diagnostic and test equipment is still amenable to further improvement, especially as it pertains to the diagnosis of incipient and intermittent faults.
This paper presents experimental results pertaining to the diagnosis of complete, partial and intermittent faults in various components of the engine emissions control system. The instrumentation used in the study permitted simultaneous and essentially continuous analysis of the exhaust gases and of engine variables. Tests were conducted using a section of the EPA urban driving cycle (I/M 240), simulated by means of a throttle/dynamometer controller. Various faults were induced in the engine control system (e.g., vacuum leaks, misfire, miscalibrated injectors) in an attempt to approximate realistic fault conditions and their effects on the exhaust emissions during the I/M 240 cycle were quantified.
The paper also proposes procedures capable of isolating the defective component(s) using model-based fault detection strategies in conjunction with a set of logical rules, representing a compilation of available diagnostic and design experience. The overall aim of this study is to provide a useful framework for the design of diagnostic instruments that will help in the improvement of the quality of high volume emissions inspection lanes and to provide accurate and reliable diagnostic information.
CitationSoliman, A. and Rizzoni, G., "The Effects of Various Engine Control System Malfunctions on Exhaust Emissions Levels During the EPA I/M 240 Cycle," SAE Technical Paper 940448, 1994, https://doi.org/10.4271/940448.
- Ribbens W.B. “Failure Diagnosis for Automotive Applications” 18th ISATA paper no. 88034
- Dankel D. II “Expert Systems: Misconception and Reality” SAE paper no. 860334 SAE International Congress & Exposition Detroit, MI February 24-28 1986
- Gertler J. “A Survey of Fault Detection and Identification” Proceedings of IFAC, IMACS Safe process Symposium Baden Baden September 1991
- Patton R. Chen C. “Model based fault detection and identification methods” Proceedings of IFAC, IMACS Safe process Symposium Baden Baden September 1991
- Isermann R. “Fault Detection and Identification by Parameter Estimation” Proceedings of IFAC, IMACS Safeprocess Symposium Baden Baden September 1991
- Rizzoni G. Min P.S. “Application of Fault Detection Filters to the Diagnosis of Sensor Faults in Electronically Controlled Engines” IEEE Transactions on Vehicular Technology May 1991
- Heywood J. “Internal Combustion Engine Fundamentals” 1988 McGraw Hill