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Discrete Proportional Plus Integral Control Algorithm for HEGO-Based Closed Loop Control
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Abstract
A modified simple discrete PI - based algorithmic approach for HEGO based closed-loop lambda air fuel ratio control of gasoline engines will be introduced for the first time in this paper. The modified PI algorithm provides very tight air fuel ratio control and has no unstable divergence from desired air fuel ratio. The integral windup effect suffered by PI based controllers has been removed here algorithmically by addition of a stable pole. This simple recursive structure, without any complex scheduling tables and transient fuel compensation, can also produce very fast recovery to the desired air fuel ratio. Comparative results with another widely used complex scheduling PI - based engine controller will be presented to show this significant finding. Finally we have not observed in literature a complete overall detailed explanation of this algorithm, addressing vital issues such as stability, sampling rate, tuning strategy or most importantly how algorithmic based PI can be implemented in a microprocessor environment. This paper will also address all these issues clearly and concisely to the extent that a formidable simple closed loop controller can be designed quickly. The presented algorithm is also applicable to UEGO based closed loop control.
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Citation
Shariati, M., Iqbal, J., and Servati, H., "Discrete Proportional Plus Integral Control Algorithm for HEGO-Based Closed Loop Control," SAE Technical Paper 970616, 1997, https://doi.org/10.4271/970616.Also In
References
- “ Adaptive Control ” Astrom Karl Johan Wittenmark Bjorn Addison Wesley Publishing Company 1989
- “ Modern Control Systems ” Dorf Richard C. Fourth Addison-Wesley Publishing Company 1986
- “ Modern Control Engineering ” Ogata Katsuhiko Prentice-Hall, Inc. Englewood Cliffs. N.J. 1970
- “ Linear Systems Control ” Sage Andrew P. 1978
- “ Digital and Kalman Filtering - An introduction to discrete-time filtering and optimum linear estimation ” Bozic S.M. Edward Arnold (Publishers) Ltd 1984
- “ Analogue and Digital signal Processing and Coding ” Grant P.M. Cowan C.F.N. Mulgrew B. Dripps J.H. Chartwell-Bratt (Publishing and Training) Ltd. 1989
- “ Digital Signal Processing - A Practical Approach ” Ifeachor Emmanuel C. Jervis Barrie W. Addison-Wesley 1996
- “ Spray/wall Interactions Simulation ” Servati Hamid B. Herman Edward W. SAE paper 890566 1989
- “ Fuel Transport Characteristics of Spark Ignition Engines for Transient Fuel Compensation ” Shayler P.J. Teo Y.C. Scarisbrick A. SAE paper 950067 1995
- “ Requirements and Performance of Engine Management Systems Under Transient Conditions ” Benninger N. F. Plapp G. SAE paper 910083 1991
- “ Emissions Reduction During Warm-Up Period by Incorporating a Wall-Wetting Fuel Model on the Fuel Injection Strategy During Engine Starting ” Horie Kaoru Takahasi Hitoshi Akazaki Shusuke SAE paper 952478 1995
- “ Development of a Highly Accurate Air-Fuel Ratio Control Method Based on Internal State Estimation ” Sekkozawa Teruji Takahashi Shinnsuke Shioya Makoto Ishii Toshio Asano Seiji Hitachi, Ltd. SAE paper 920290 1992