This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Measurement of Oxygen Storage Capacity of Three-Way Catalyst and Optimization of A/F Perturbation Control to Its Characteristics
Technical Paper
2002-01-1094
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In order to study alternate methods of Air Fuel ratio (A/F) perturbation for maximizing three-way catalyst conversion efficiency, two methods for measuring the Oxygen Storage Capacity (OSC) of Catalyst were developed on an engine test bench. The first is to measure just the break-through Perturbing Oxygen Quantity (POQ, which is defined as the product of A/F amplitude, perturbation period and gas flow), and the second is to measure the response delay of the rear A/F sensor, which has been improved to be very similar to the former.
Then, the OSC values of many catalysts were investigated with different perturbation parameters. The results show that OSC would not be affected by amplitude, period of perturbation and gas flow, and that the best conversion efficiency is obtained when the value of POQ is about 1/2 of the value for OSC.
These results suggest that the best way to control perturbation is to keep POQ at 1/2 of OSC by setting perturbation parameters. Then optimized perturbation control algorithm has been developed and satisfactory conversion efficiency is realized. Furthermore, the perturbation control is appeared to make the catalyst monitor system more confident.
Recommended Content
| Technical Paper | A Phenomenological Control Oriented Lean NOx Trap Model |
| Technical Paper | Phased Air/Fuel Ratio Perturbation - A Fuel Control Technique for Improved Catalyst Efficiency |
| Technical Paper | Indirect Adaptive Control of a Three-Way Catalyst |
Authors
Citation
Miyamoto, K., Takebayashi, H., Ishihara, T., Kido, H. et al., "Measurement of Oxygen Storage Capacity of Three-Way Catalyst and Optimization of A/F Perturbation Control to Its Characteristics," SAE Technical Paper 2002-01-1094, 2002, https://doi.org/10.4271/2002-01-1094.Also In
References
- Kitagawa Hiroshi Mibe Toshihiro Okamatsu Kazunori Yasui Yuji L4-Engine Development for a Super Ultra Low Emissions Vehicle SAE Paper 2000-01-0887
- Jobson Edward Laurell Mats Hogberg Erik Bernler Hans Lundgren Staffan Wirmark Goran Smedler Gudmund Deterioration of Three-Way Automotive Catalysts, Part 1-Steady State and Transient Emission of Aged Catalyst SAE Paper 930937
- Yasui Yuji Akazaki Shusuke Ueno Masaki Iwaki Yoshihisa Secondary O2 Feedback Using Prediction and Identification Type Sliding Mode Control SAE Paper 2000-01-0936
- Kurihara. N. Kimura. H. Ishii. T. Takaku. Y. An on-board diagnosis method for three-way catalyst deterioration SAE Paper 972854
- Ohsawa Katsuyuki Baba Naoki Kojima Shinji Numerical Prediction of Transient Conversion Characteristics in a Three-Way Catalytic Converter SAE Paper 982556
- Laing Paul M. Shane Michael D. Son Seha Adamczyk Andrew A. Li Peter A Simplified Approach to Modeling Exhaust System Emissions: SIMTWC SAE Paper 1999-01-3476
- Smedler Gudmund Eriksson Soren Lindblad Magnus Bernler Hans Lundgren Staffan jobson Edward Deterioration of Three-Way Automotive Catalysts, Part II - Oxygen Strage Capacity at Exhaust Condition SAE Paper 930944
- Theis Joseph R An Engine Test to Measure the Oxygen Storage Capacity of a catalyst SAE Paper 961900
- Jackson Richard A. Jones James C. Peyton Pan Jinfeng Roberts J. Brian Childs Peter R. N. Chemical Aspects of the Dynamic Performance of a Three-Way Catalyst SAE Paper 1999-01-0312
- Jones James C. Peyton Roberts J. Brian Pan Jinfeng Jackson Richard A. Modeling the Transient Characteristics of a Three-Way Catalyst SAE Paper 1999-01-0460