This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Behaviours of a GDI Gasoline Engine during Start
Technical Paper
2014-01-1374
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Vehicle start-stop systems are becoming increasingly prevalent on internal combustion engine (ICE) because of the capability to reduce emissions and fuel consumption in a cost effective manner. Thus, the ICE undergoes far more starting events, therefore, the behaviour of ICE during start-up becomes critical.
In order to simulate and optimise the engine start, Model in the Loop (MiL) simulation approach was selected. A proceduralised cranking test has been carried out on a 2.0-liter turbocharged, gasoline direct injection (GDI) engine to collect data. The engine behaviour in the first 15 seconds was split into eight different phases and studied.
The engine controller and the combustion system were highly transient and interactive. Thus, a controller model that can set accurate boundary conditions is needed. The relevant control functions of throttle opening and spark timing have been implemented in Matlab/Simulink to simulate the behaviours of the controller. Good agreements were found between the measured and predicted control parameters. The accuracy of the engine speed input to the controller model was crucial to the prediction of the control parameters. Therefore, the engine friction and the combustion model were essential to the overall accuracy of the MiL simulation.
The combustion during engine start has been analysed. Cyclic variability resulted in large variation in the 10-90% burn duration during start. Difference of up to approximately 50 degrees crank angle was observed between two adjacent combustion cycles under same operating condition. This highlights the necessity of simulating the combustion cyclic variability as the Coefficient of Variation in IMEP (COVIMEP) during start is an important factor to optimise. In addition, with the capability of modelling the interaction between the controller and the combustion system, advanced control strategies can be assessed in the co-simulation environment.
Recommended Content
Authors
Topic
Citation
Tang, H., Burke, R., Akehurst, S., Brace, C. et al., "Behaviours of a GDI Gasoline Engine during Start," SAE Technical Paper 2014-01-1374, 2014, https://doi.org/10.4271/2014-01-1374.Also In
References
- Burke , R.D. , Brace , C.J. , Hawley , J.G. , and Pegg , I. Review of the systems analysis of interactions between the thermal, lubricant, and combustion processes of diesel engines Proc. IMechE, Part D: J. Automobile Engineering 2010 224 5 681 704 10.1243/09544070JAUTO1301
- Rimmelspacher , D. , Baumann , W. , Klein , P. , and Linssen , Rene Transient Calibration Process using Chip Simulation and Dynamic Modeling 7th Conference on Design of Experiments (DoE) in Engine Development Berlin 2013
- Koltsakis , G. , Samaras , Z. , Karvountzis-Kontakiotis , A. , Zacharopoulou , T. et al. Implications of Engine Start-Stop on After-Treatment Operation SAE Int. J. Engines 4 1 1571 1585 2011 10.4271/2011-01-1243
- Kataoka , K. and Tsuji , K. Crankshaft Positioning Utilizing Compression Force and Fast Starting with Combustion Assist for Indirect Injection Engine SAE Technical Paper 2005-01-1166 2005 10.4271/2005-01-1166
- Surewaard , E. , Kok , D. , and Tiller , M. Engine Cranking: Advanced Modeling and an Investigation of the Influence of the Initial Crank Angle and Inertia SAE Technical Paper 2004-01-1875 2004 10.4271/2004-01-1875
- Kuang , M. An Investigation of Engine Start-Stop NVH in A Power Split Powertrain Hybrid Electric Vehicle SAE Technical Paper 2006-01-1500 2006 10.4271/2006-01-1500
- Yu , S. , Dong , G. , Gao , Y. , and Li , L. Transient Characteristics of Combustion and Emissions during Start up at Higher Cranking Speed in a PFI Engine for HEV Application SAE Technical Paper 2008-01-2420 2008 10.4271/2008-01-2420
- Matsuura , M. , Korematsu , K. , and Tanaka , J. Fuel Consumption Improvement of Vehicles by Idling Stop SAE Technical Paper 2004-01-1896 2004 10.4271/2004-01-1896
- Boumans , M. , Hein , I. , Lang , T. , and Lengerer , W. Use of Simulation for the calibration of Engine Control Units 9th Symposium on Automotive Powertrain Control Systems Berlin 2012
- Suyabodha , A. , Pennycott , A. , and Brace , C.J. A preliminary approach to simulating cyclic variability in a port fuel injection spark ignition engine Proc. IMechE, Part D: J. Automobile Engineering 2013 227 5 665 674 10.1177/095440701245597
- Tily , R. The Application of Sonification and Time Series Analysis to Cyclic Variation in Internal Combustion Engines PhD Thesis University of Bath UK 2009
- Suyabodha , A. Simulation of Cyclic Variability in Gasoline Engine under Cold Start Conditions PhD Thesis University of Bath UK 2012
- Incropera F. P. and De Witt D. P. Introduction to Heat transfer 2nd New York John Wiley and sons Inc. 1985
- Randolph , A. Methods of Processing Cylinder-Pressure Transducer Signals to Maximize Data Accuracy SAE Technical Paper 900170 1990 10.4271/900170
- Cowart , J. Air-Fuel Ratio Measurement Diagnostics During Cranking and Startup in a Port-Fuel-Injected Spark-Ignition Engine SAE Technical Paper 2004-01-1915 2004 10.4271/2004-01-1915