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Secondary O2 Feedback Using Prediction and Identification Sliding Mode Control -Second Report-
Technical Paper
2001-01-0264
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
The Honda Accord is the world's first automobile meeting the SULEV category criteria in the LEV-II exhaust emissions standards. An improved accuracy engine control system and catalyst account for the automobile's extremely low emissions. The accuracy engine control system includes double adaptive air-fuel ratio feedback loops composed of STR (Self-Tuning Regulator), for primary air-fuel ratio control, and PRISM (Prediction and Identification Sliding Mode Control), for secondary O2 feedback. The basic algorithm of the latter was presented at SAE 20001).
However, two issues required further PRISM algorithm improvements in order to apply the double adaptive loops to an actual vehicle. One such achievement is both the compensation for engine dynamic characteristics by PRISM and the avoidance of the reciprocal interference with two adaptive loops. Another improvement is the identification of an exact controlled object model that provides the same frequency characteristics as that of a controlled object from the UEGO sensor upstream of the catalyst to the HEGO sensor downstream.
Consequently, several algorithm improvements were introduced to the double adaptive loops discussed in this paper in order to resolve these issues.
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Citation
Yasui, Y., Akazaki, S., Ueno, M., and Iwaki, Y., "Secondary O2 Feedback Using Prediction and Identification Sliding Mode Control -Second Report-," SAE Technical Paper 2001-01-0264, 2001, https://doi.org/10.4271/2001-01-0264.Also In
Electronic Engine Controls: Modeling, Controls, Obd and Neural Networks
Number: SP-1585; Published: 2001-03-05
Number: SP-1585; Published: 2001-03-05
References
- Yasui, Akazaki Ueno, Iwaki Secondary O 2 Feedback Using Prediction and Identification Type Sliding Mode Control SAE Paper 2000-01-0936 2000
- Kitagwa, Mibe Okamatsu, Yasui L4-Engine Development for a Super Ultra Low Emission Vehicle SAE paper 2000-01-0887 2000
- Ueno, Akazaki Yasui, Iwaki A Quick Warm-up System during Engine Start-up Period Using Adaptive Control of Intake Air and Ignition Timing SAE Paper 2000-01-0551 2000
- Nishizawa, Momoshima Koga, Tsuchida Development of New Technologies Targeting Zero Emissions for Gasoline Engines SAE Paper 2000-01-0890 2000
- Yamamoto, Matsushima Etoh, Takaya In-line Hydrocarbon System for Reducing Cold-Start Emissions SAE Paper 2000-01-0892 2000
- Adachi System Identification Theory for Users Tokyo SICE 222 1993