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Exhaust - Intake Manifold Model for Estimation of Individual Cylinder Air Fuel Ratio and Diagnostic of Sensor - Injector
Technical Paper
2003-01-1059
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
An individual cylinder AFR estimator using a single proportional oxygen sensor (UEGO) situated at the confluence point of the exhaust manifold has previously been described ([1],[2]). As this model is nonlinear, it proposes a linear slicing by zone [3], enabling it to apply the estimator to the entire range of engine speeds.
However, several problems remain; the model [3] is complicated and therefore difficult to program in an electronic engine control, the model is no longer valid with the ageing of sensors, injectors, or the motor, it is impossible to diagnostic the defaulting organ or one which deviates.
The work set out in this article describes a model, and the conditions for its identification, which resolve these. The resultats obtained on engine tests show that the model is robust, precise and capable of estimating cylinder AFR as well as diagnosticing an injector or UEGO sensor deviation.
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Citation
Fantini, J. and Burq, J., "Exhaust - Intake Manifold Model for Estimation of Individual Cylinder Air Fuel Ratio and Diagnostic of Sensor - Injector," SAE Technical Paper 2003-01-1059, 2003, https://doi.org/10.4271/2003-01-1059.Also In
References
- HASEGAWA Y. al. «Individual Cylinder Air Fuel Ratio Feedback Control Using an Observer» SAE Paper 940376
- CARNEVALE C. HADJI M. «Cylinder to Cylinder AFR Control with an Asymetrical Exhaust Manifold in a GDI System» SAE Paper 981064
- FANTINI J. CHAMAILLARD Y. GOUY F. PERON L. «Determination of a nonlinear, unified and robust individual cylinder Air Fuel Ratio estimator» SAE Paper 00P-287
- Matlab's Optimisation Toolbox
- GRIZZLE J. DOBBINS K. COOK J. «Individual Cylinder Air-Fuel Ratio Control with a Single EGO Sensor » 1991 IEEE Transactions on Vehiclular Technology 40 1
- AMSTUTZ A. FEKETE N. POWELL D. «Model Based Air-Fuel Ratio Control in SI Engine with a Switch-Type EGO Sensor» SAE 940972
- KAINZ J. L. SMITH J. C. «Individual Cylinder Fuel Control with a Switching Oxygen Sensor» SAE 99-01-0546