Model-based combustion control of a HCCI engine using external EGR and the exhaust rebreathed

Yuta Kugimachi, Yusuke Nakamura, Norimasa Iida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

To approach realization of Homogeneous Charge Compression Ignition (HCCI) combustion without external combustion ignition trigger, it is necessary to construct HCCI engine control system. In this study, HCCI research engine equipped with the EGR passage for external EGR and the two-stage exhaust cam for exhaust rebreathed. This system can control the mixing ratio of four gases (air, fuel, rebreathed EGR gas, external EGR gas) of in-cylinder by operating four throttles and fuel injection duration while maintaining acceptable pressure rise rate (PRR) and cycle-to-cycle variation of Indicated Mean Effective Pressure (IMEP), closed-loop control system designed by applying feedback variables (equivalence ratio, combustion-phasing, IMEP) for feedback control. Those control inputs (four throttles and fuel injection) has correlation mutually, control inputs cause interference, response become low and hunching occurs. Therefore, model-based control system with modern control theory which is multi-inputs-multi-outputs system has been constructed to control HCCI combustion. For easily constructing linear- quadratic-integral (LQI) controller, discrete model was designed by discretizing 1 cycle of HCCI combustion into 6 points that represent the control-oriented description of the HCCI engine as a thermodynamic system. Although the results from discrete model nearly match with that of experiments near the base condition, the errors became large as the control input separates from base conditions. Furthermore, we tried linearization of discrete model implementing Taylor expansion for LQI control system.

Original languageEnglish
Title of host publicationSAE Technical Papers
PublisherSAE International
Volume2014-November
DOIs
Publication statusPublished - 2014 Nov 11
EventSAE/JSAE 2014 20th Annual Small Engine Technology Conference and Exhibition, SETC 2014 - Pisa, Italy
Duration: 2014 Nov 182014 Nov 20

Other

OtherSAE/JSAE 2014 20th Annual Small Engine Technology Conference and Exhibition, SETC 2014
CountryItaly
CityPisa
Period14/11/1814/11/20

Fingerprint

Ignition
Engines
Control systems
Fuel injection
Gases
Closed loop control systems
Cams
Engine cylinders
Control theory
Linearization
Feedback control
Thermodynamics
Feedback
Controllers
Air
Experiments

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Cite this

Kugimachi, Y., Nakamura, Y., & Iida, N. (2014). Model-based combustion control of a HCCI engine using external EGR and the exhaust rebreathed. In SAE Technical Papers (Vol. 2014-November). SAE International. https://doi.org/10.4271/2014-32-0079

Model-based combustion control of a HCCI engine using external EGR and the exhaust rebreathed. / Kugimachi, Yuta; Nakamura, Yusuke; Iida, Norimasa.

SAE Technical Papers. Vol. 2014-November SAE International, 2014.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kugimachi, Y, Nakamura, Y & Iida, N 2014, Model-based combustion control of a HCCI engine using external EGR and the exhaust rebreathed. in SAE Technical Papers. vol. 2014-November, SAE International, SAE/JSAE 2014 20th Annual Small Engine Technology Conference and Exhibition, SETC 2014, Pisa, Italy, 14/11/18. https://doi.org/10.4271/2014-32-0079
Kugimachi Y, Nakamura Y, Iida N. Model-based combustion control of a HCCI engine using external EGR and the exhaust rebreathed. In SAE Technical Papers. Vol. 2014-November. SAE International. 2014 https://doi.org/10.4271/2014-32-0079
Kugimachi, Yuta ; Nakamura, Yusuke ; Iida, Norimasa. / Model-based combustion control of a HCCI engine using external EGR and the exhaust rebreathed. SAE Technical Papers. Vol. 2014-November SAE International, 2014.
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