This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Investigation on the Highly Precise Air Fuel Ratio Adaptive Control in Transient States under Changes in the Intake Valve Opening Timing
Technical Paper
2014-01-1162
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
This paper investigated highly precise control of the air fuel ratio (AFR) of a gasoline engine in a transient state acceleration or deceleration at several starting engine speeds and several intake valve opening (IVO) timings.
First, a two-input and one-output linearized engine model was developed for the design of the AFR control system. In order to compensate for the AFR deterioration caused by the actuation of the throttle valve during acceleration or deceleration, a feed-forward (FF) controller was developed based on the model. In order to add adaptability to the FF controller, a compensation using an error value from the AFR target value was equipped. The feedback (FB) system was designed using a backstepping method that is well known as an adaptive controller for a non-linear system. By repeating several times of acceleration and deceleration, the FF and the FB controller performed in harmony as if those were fused in one controller, then, a precise AFR control results were obtained.
Two sets of parameters in each controller were provided and an investigation was carried out as to which combination is superior for robustness regarding several initial starting engine speeds and IVO timings. The pressure and the flow rate of the internal EGR were altered momentarily according to the intake valve angle; therefore, large system parameter changes were recognized. By combining a fast response adaptive FF controller and a bit more moderate response backstepping FB controller, precise and robust AFR control results were attained.
Recommended Content
Authors
Citation
Takiyama, T., "Investigation on the Highly Precise Air Fuel Ratio Adaptive Control in Transient States under Changes in the Intake Valve Opening Timing," SAE Technical Paper 2014-01-1162, 2014, https://doi.org/10.4271/2014-01-1162.Also In
References
- Yonekawa , A. , Ueno , M. , Watanabe , O. , and Ishikawa , N. Development of New Gasoline Engine for ACCORD Plug-in Hybrid SAE Technical Paper 2013-01-1738 2013 10.4271/2013-01-1738
- Kobayashi , A. , Satou , T. , Isaji , H. , Takahashi , S. et al. Development of New I3 1.2L Supercharged Gasoline Engine SAE Technical Paper 2012-01-0415 2012 10.4271/2012-01-0415
- Yasui Yuji , Kawasumi Ikue and Higashitani Kousuke The Adaptive Air-Fuel Ratio Control for High-Efficiency and Low-Emission Engines SICE Trans. on Industrial Application 9 3 11 16 2010
- Takiyama Takeshi Investigation about Robustness of Simple Adaptive Control for Air Fuel Ratio Control at Transient State Trans. of JSAE, No.20114674 42 5 1073 1078 2011
- Takiyama Takeshi Investigation about Robustness of Air Fuel Ratio Control at Transient State by Fusing Adaptive PID Control and Adaptive Feedforward System Trans. of JSAE, No.20124228 43 2 331 336 2012
- Aquino , C. Transient A/F Control Characteristics of the 5 Liter Central Fuel Injection Engine SAE Technical Paper 810494 1981 10.4271/810494
- Krstić M. , Kanellakopoulos I. and Kokotović P. Nonlinear and Adaptive Control Design JohnWiley & Sons, Inc. 0-471-12732-9 1995
- Fredriksson , J. and Egardt , B. Backstepping Control with Integral Action Applied to Air-to-Fuel Ratio Control for a Turbocharged Diesel Engine SAE Technical Paper 2002-01-0195 2002 10.4271/2002-01-0195
- Chatlatanagulchai , W. , Yaovaja , K. , Rhienprayoon , S. , and Wannatong , K. Air-Fuel Ratio Regulation with Optimum Throttle Opening in Diesel-Dual-Fuel Engine SAE Technical Paper 2010-01-1574 2010 10.4271/2010-01-1574
- Bresch-Pietri Delphine , Chauvin Jonathan and Petit Nicolas Adaptive Backstepping Controller for Uncertain Systems With Unknown Input Time-Delay. Application to SI Engines 49th IEEE Conference on Decision and Control 3680 3687 2010