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Development of Next-Generation Air-Fuel Ratio Control System, “COSMIC”
Technical Paper
2002-01-0477
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
For compliance with the exhaust emission regulations, such as SULEV and STAGE4, a new air-fuel ratio control system has been developed. The concept behind this system is that the best performance of air-fuel ratio control is achieved with the minimum of man-hours of adaptation. The system consists of a section in which an engine's air-fuel ratio is fed back and a section in which the amount of oxygen stored by the catalyst is predicted and controlled. In the feedback section, a high-precision air-fuel ratio control was achieved. In the oxygen storage mass predicting and controlling section, a catalyst model was incorporated to predict the amount of oxygen in the catalyst. The important point to note in this control system is that the air-fuel ratio feedback section requires no adaptation work when using an actual engine. Furthermore, a linearized oxygen sensor capable of detecting air-fuel ratios has been also developed at a reasonable cost to exploit the high controllability and good robustness of the control system. In consequence, a sophisticated but low-cost air-fuel ratio control system was successfully developed.
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Citation
Hosoya, H., Yoshizawa, H., Ohkuma, S., Watanabe, S. et al., "Development of Next-Generation Air-Fuel Ratio Control System, “COSMIC”," SAE Technical Paper 2002-01-0477, 2002, https://doi.org/10.4271/2002-01-0477.Also In
Electronic Engine Controls 2002: Electronics and Information Gathering
Number: SP-1690; Published: 2002-03-04
Number: SP-1690; Published: 2002-03-04
References
- Hasegawa Y. Akazaki S. Komoriya I. Maki H. Nishimura Y. Hirota T. “Individual Cylinder Air-Fuel Ratio Feedback Control Using an Observer” SAE Paper No. 940376 1994
- Ohata A. Ohashi M. Nasu M. Inoue T. “Model Based Air Fuel Ratio Control for Reducing Exhaust Gas Emissions” SAE Paper No. 950075
- Yasui Y. Akazaki S. Ueno M. Iwaki Y. “Secondary O2 Feedback Using Prediction and Identification type Sliding Mode Control” SAE Paper No. 2000-01-0936 2000
- Peyton Jones J. C. Jackson R. A. Roberts J. B. Bernard P. “A Simplified Model for the Dynamics of a Three-Way Catalytic Converter” SAE Paper No. 2000-01-0652 2000
- Balenovic M. Backx A. C. P. M. Hoebink J. H. B. J. “On a Model-Based Control of a Three-Way Catalytic Converter” SAE Paper No. 2001-01-0937 2001
- Hosoya H. Yoshizawa H. Watanabe S. Tomisawa N. Abe K. “Development of New Concept Control System for Valve Timing Control” SAE Paper No. 2000-01-1226 2000
- Kei T. “Catalyst Chemistry” Tokyokagakudojin 1981