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Driving Cycle Based Control and Calibration for a Turbocharged SI Engine with Low Pressure EGR System
Technical Paper
2020-01-2015
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Low pressure cooled EGR (LPEGR) for spark ignition (SI) engines is known to be one of the key technologies to benefit fuel consumption owing to lower pumping loss at part load, knock suppression capability and extended stoichiometric operating range thanks to combustion cooling effect. In order to implement this technology to industrialised application with the optimal performance efficiently and robustly, several challenges need to be solved, especially the EGR estimation accuracy and transport delay estimation accuracy during transient. And these challenges could be more complex on a turbocharged SI engine due to the much longer induction system, and more complex air path model due to the introduction of turbine, compressor and dump valve.
This paper describes the control and calibration method for a turbocharged LPEGR engine, and the validation result in Worldwide harmonized Light vehicles Test Cycles (WLTC). The test result shows remarkable fuel benefit and accurate EGR estimation. Furthermore, the control architecture, Engine Management System (EMS) co-operation method, control performance and real-world application issues will be also discussed. The introduced LPEGR engine control and calibration development method shows great efficiency and flexibility, which allows Ricardo to offer the same off-the-shelf service to customers.
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Citation
Ma, H., Noguchi, H., and Williams, P., "Driving Cycle Based Control and Calibration for a Turbocharged SI Engine with Low Pressure EGR System," SAE Technical Paper 2020-01-2015, 2020, https://doi.org/10.4271/2020-01-2015.Also In
References
- Takaki , D. , Tsuchida , H. , Kobara , T. , Akagi , M. et al. Study of an EGR System for Downsizing Turbocharged Gasoline Engine to Improve Fuel Economy SAE Technical Paper 2014-01-1199 2014 https://doi.org/10.4271/2014-01-1199
- Siokos , K. 2017
- Siokos , K. , Koli , R. , Prucka , R. , Schwanke , J. et al. Assessment of Cooled Low Pressure EGR in a Turbocharged Direct Injection Gasoline Engine SAE Int. J. Engines 8 4 10.4271/2015-01-1253
- Shojaeefard , M. , Tahani , M. , Etghani , M. , Akbari , M. Cooled EGR for a Turbo Charged SI Engine to Reduce Knocking and Fuel Consumption
- Liu , F. , and Pfeiffer , J. Estimation Algorithms for Low Pressure Cooled EGR in Spark-Ignition Engines SAE Int. J. Engines 8 4 2015 10.4271/2015-01-1620
- Liu , F. , Pfeiffer , J. , Caudle , R. , Marshall , P. et al. Low Pressure Cooled EGR Transient Estimation and Measurement for an Turbocharged SI Engine SAE Technical Paper 2016-01-0618 2016 https://doi.org/10.4271/2016-01-0618
- Kiwan , R. , Stefanopoulou , A. , Martz , J. , Surnilla , G. et al. Effects of Differential Pressure Sensor Gauge-Lines and Measurement Accuracy on Low Pressure EGR Estimation Error in SI Engines SAE Technical Paper 2017-01-0531 2017 https://doi.org/10.4271/2017-01-0531
- https://www.etas.com/en/products/es910_rapid_prototyping_module.php
- https://www.etas.com/download-center-files/products_ES600/ES63x.1_UG_R06_EN.pdf
- https://www.etas.com/en/products/etk.php
- Isermann , R. 10.1007/978-3-642-39934-3
- Welling , O. , and Collings , N. UEGO Based Measurement of EGR Rate and Residual Gas Fraction SAE Technical Paper 2011-01-1289 2011 https://doi.org/10.4271/2011-01-1289
- Koli , R. , Siokos , K. , Prucka , R. , Jade , S. et al. A Control Algorithm for Low Pressure - EGR Systems Using a Smith Predictor with Intake Oxygen Sensor Feedback SAE Technical Paper 2016-01-0612 2016 https://doi.org/10.4271/2016-01-0612