Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Nonlinear Static Model-based Feedforward Control Algorithm for the EGR and VGT Systems of Passenger Car Diesel Engines

승용디젤엔진의 EGR, VGT 시스템을 위한 비선형 정적 모델 기반 피드포워드 제어 알고리즘 설계

  • Park, Inseok (Automotive Control and Electronics Laboratory (ACE Lab), Hanyang University) ;
  • Park, Yeongseop (Department of Automotive Engineering, Graduate School, Hanyang University) ;
  • Hong, Seungwoo (Department of Automotive Engineering, Graduate School, Hanyang University) ;
  • Chung, Jaesung (Department of Automotive Engineering, Graduate School, Hanyang University) ;
  • Sohn, Jeongwon (Department of Automotive Engineering, Graduate School, Hanyang University) ;
  • Sunwoo, Myoungho (Department of Automotive Engineering, Hanyang University)
  • 박인석 (한양대학교 자동차전자제어연구소) ;
  • 박영섭 (한양대학교 대학원 자동차공학과) ;
  • 홍승우 (한양대학교 대학원 자동차공학과) ;
  • 정재성 (한양대학교 대학원 자동차공학과) ;
  • 손정원 (한양대학교 대학원 자동차공학과) ;
  • 선우명호 (한양대학교 미래자동차공학과)
  • Received : 2013.04.01
  • Accepted : 2013.04.22
  • Published : 2013.11.01
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Abstract

This paper presents a feedforward control algorithm for the EGR and VGT systems of passenger car diesel engines. The air-to-fuel ratio and boost pressure are selected as control indicators and the positions of EGR valve and VGT vane are used as control inputs of the EGR and VGT controller. In order to compensate the non-linearity and coupled dynamics of the EGR and VGT systems, we have proposed a non-linear model-based feedforward control algorithm which is obtained from static model inversion approach. It is observed that the average modeling errors of the feedforward algorithm is about 2% using stationary engine experiment data of 225 operating conditions. Using a feedback controller including proportional-integral, the modeling error is compensated. Furthermore, it is validated that the proposed feedforward algorithm generates physically acceptable trajectories of the actuator and successfully tracks the desired values through engine experiments.

Keywords

References

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