This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Setup of an Engine Rapid Control Prototyping System for Catalyst Research and Evaluation Testing
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2008 by SAE International in United States
Annotation ability available
To fulfill ever increasingly stringent emission regulations, a great many studies on engine control and catalytic converter performance have been made. Topics of great interest in this area, to name a few, include: the relationship between catalyst light-off time and air-fuel (A/F) ratio; the relationship between forced A/F ratio modulation and catalyst efficiency; the effects of phase-shifted A/F ratio modulation between banks of a dual bank engine, or among cylinders of a single manifold engine on catalyst efficiency; and methods of modeling and measuring the oxygen storage capacity of a catalytic converter by rich-lean transition, A/F ratio sweeping, or other on-line estimation methods.
To undertake this type of research, an engine control system with necessary functions, especially with very flexible A/F ratio control capabilities, is needed. Mass production ECU does not provide the flexibility desired and it is also hard to develop and integrate the control algorithms needed for catalyst testing into the existing ECU software. An engine rapid control prototyping system is set up in an engine dynamometer test cell environment to overcome the limitations of mass production ECU and fulfill the requirements for catalyst research and testing. Model-based development methodology is adopted for the design and implementation of necessary software. Control algorithms, including individual bank control of a dual bank engine, A/F ratio modulation of different frequencies and amplitudes, with and without phase shift between banks, A/F ratio rich-lean transition and sweeping etc, are designed using graphical language, automatically converted into executables to run on the real-time target. UDP communication for real-time command and variable exchange between the engine controller and the test cell controller is developed to facilitate testing. The system provides the flexibility and good control performance desired for catalyst research and evaluation testing. Application and results of the system on a 4.6L V8 gasoline engine is given.
CitationJiang, S., Smith, M., Furukawa, S., and Menge, M., "Setup of an Engine Rapid Control Prototyping System for Catalyst Research and Evaluation Testing," SAE Technical Paper 2008-01-0286, 2008, https://doi.org/10.4271/2008-01-0286.
- Reed Dennis C. Hamburg Douglas R. Samimy Bahman Closed-Loop Air-Fuel Ratio Control Using Forced Air-Fuel Ratio Modulation SAE 980041
- Webb Cynthia C. DiSilverio William D. et.al. Phased Air/Fuel Ratio Perturbation - A Fuel Control Technique for Improved Catalyst Efficiency SAE 2000-01-0891
- Webb C. C. Bykowski B. B. Effect of Phased Air/Fuel Ratio Perturbation and Catalyst O2 Storage Capability on Catalyst Conversion Efficiency SAE 2000-01-2924
- Miyamoto Kouji Takebayashi Hiroyuki et.al. Measurement of Oxygen Storage Capacity of Three-Way Catalyst and Optimization of A/F Perturbation Control to Its Characteristics SAE 2002-01-1094
- Ingram Grant A. Surnilla Gopichandra On-line Oxygen Storage Capacity Estimation of a Catalyst SAE 2003-01-1000
- Khossusi Touraj McCullough Geoffrey Douglas Roy Investigation of Oxygen Storage in Three Way Automotive Catalysts SAE 2004-01-1836
- Takubo Hideki Umeno Takahiro Goto Hideki New Lambda - Lambda Air-Fuel Ratio Feedback Control SAE 2007-01-1340
- Campbell B. Farrington R. et.al Improved Three-Way Catalyst Performance Using an Active Bias Control Regeneration System SAE 2000-01-0499
- Cavina Nicolò Fast Algorithm for Individual Cylinder Air-Fuel Ratio Control SAE 2005-01-3759
- Balenovic M. Backx A. C. P. M. Hoebink J. H. B. J. On a Model-based Control of a Three-way Catalytic Converter SAE 2001-01-0937
- Balenovic Mario Backx Ton Development of a Model-Based Controller for a Three-Way Catalytic Converter SAE 2002-01-0475
- Jones James C. Peyton Muske Kenneth R. Model-based OBD for Three-Way Catalyst Systems SAE 2004-01-0639
- Kitagawa Hiroshi Mibe Toshihiro et.al. L4-Engine Development for a Super Ultra Low Emissions Vehicle SAE 2000-01-0887
- Jiang Shugang Medonza Dharshan et.al. Design and Implementation of an Integrated Development Environment Consisting of Engine Rapid Control Prototyping and Real Time Vehicle Simulation SAE 2007-01-0515