This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Mode Transition Optimisation for Variable Displacement Engines
Technical Paper
2016-01-0619
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The deactivation of one or more cylinders in internal combustion engines has long been established in literature as a means of reducing engine pumping losses and thereby improving brake specific fuel consumption. As down-sizing and down-speeding of modern engines becomes more extreme, drivability issues associated with mode transition become more acute and need to be managed within a suitable calibration framework. This paper presents methodology by which a calibration may be deduced for optimal mode-transitioning in respect of minimising the torque disturbance as cylinders are deactivated and re-activated. At the outset of this study a physics based engine model is used to investigate the key parameters that influence the transition. Having understood these, experiments are designed to establish the level of mode transition disturbance using quantitative statistical indicators such that the cost function may be defined and an optimisation undertaken.
The efficacy of the proposed framework is illustrated using a state-of-art engine simulation model that replicates the functionality of a real variable displacement engine. Results show that during mode transition periods the peak torque deviation can be reduced up to five percent of the requested torque. The suggested methodology provides a solution to the mode transition disturbance of variable displacement engines, it is equally applicable in other hybrid/switching powertrain systems where mode transition disturbances are present such as homogeneous charge compression ignition engines and hybrid electric powertrains.
Recommended Content
Authors
Topic
Citation
Souflas, I., Mason, B., Cary, M., and Schaal, P., "Mode Transition Optimisation for Variable Displacement Engines," SAE Technical Paper 2016-01-0619, 2016, https://doi.org/10.4271/2016-01-0619.Also In
References
- IPCC Climate Change 2007 - Mitigation of Climate Change. Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change Cambridge, United Kingdom and New York, NY, USA Cambridge University Press 2007
- King J. The King Review of low-carbon cars Part II: recommendations for action HM Treasury, London, UK 2007
- Kuruppu , C. , Pesiridis , A. , and Rajoo , S. Investigation of Cylinder Deactivation and Variable Valve Actuation on Gasoline Engine Performance SAE Technical Paper 2014-01-1170 2014 10.4271/2014-01-1170
- Zammit J.-P. , McGhee M. J. , Shayler P. J. , and Pegg I. The influence of cylinder deactivation on the emissions and fuel economy of a four-cylinder direct-injection diesel engine Proc. Inst. Mech. Eng. Part D J. Automob. Eng. 228 2 206 217 2014 10.1177/0954407013506182
- Leone , T. and Pozar , M. Fuel Economy Benefit of Cylinder Deactivation - Sensitivity to Vehicle Application and Operating Constraints SAE Technical Paper 2001-01-3591 2001 10.4271/2001-01-3591
- Fujiwara , M. , Kumagai , K. , Segawa , M. , Sato , R. et al. Development of a 6-Cylinder Gasoline Engine with New Variable Cylinder Management Technology SAE Technical Paper 2008-01-0610 2008 10.4271/2008-01-0610
- Falkowski , A. , McElwee , M. , and Bonne , M. Design and Development of the DaimlerChrysler 5.7L HEMI® Engine Multi-Displacement Cylinder Deactivation System SAE Technical Paper 2004-01-2106 2004 10.4271/2004-01-2106
- Nester , T. , Haddow , A. , Shaw , S. , Brevick , J. et al. Vibration Reduction in a Variable Displacement Engine Using Pendulum Absorbers SAE Technical Paper 2003-01-1484 2003 10.4271/2003-01-1484
- Schamel A. , Scheidt M. , Weber C. , and Faust H. Is Cylinder Deactivation a Viable Option for a Downsized 3-Cylinder Engine? 36th International Vienna Motor Symposium 2015
- Prucka M. J. , Bonne M. A. , Falkowski A. G. , Duty M. J. , and McElwee M. R. Transition control for multiple displacement engine US7021273 Apr 4 2006
- Michelini J. O. and Lewis D. J. Cylinder and valve mode control for an engine with valves that may be deactivated US7066121 Jun 27 2006
- Rayl A. B. Cylinder deactivation engine control system with torque matching US6655353 Dec 2 2003
- Michelini J. and Glugla C. Control system design for steady state operation and mode switching of an engine with cylinder deactivation American Control Conference, 2003. Proceedings of the 2003 4 3125 3129 4 2003 10.1109/ACC.2003.1244009
- The Mathworks Model-Based Calibration Toolbox 2015 http://uk.mathworks.com/products/mbc/
- Smith E. D. , Szidarovszky F. , Karnavas W. J. , and Bahill A. T. Sensitivity Analysis, a Powerful System Validation Technique Open Cybern. Syst. J. 2 39 56 2008 10.2174/1874110X00802010039
- Röpke K. and von Essen C. DoE in engine development Qual. Reliab. Eng. Int. 24 6 643 651 2008 10.1002/qre.941
- Cary M. A Model Based Engine Calibration Methodology for a Port Fuel Injection, Spark-Ignition Engine PhD Thesis School of Engineering, Univeristy of Bradford Bradford 2003