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Thermodynamic modeling and control of a negative valve overlap turbo HCCI engine

Aulin, Hans LU ; Johansson, Thomas LU ; Tunestål, Per LU and Johansson, Bengt LU (2009) 11th IASTED International Conference on Control and Applications, CA 2009 In Proceedings of the 11th IASTED International Conference on Control and Applications, CA 2009 p.286-293
Abstract

It is tractable to increase the torque for an HCCI engine and one way is to add a turbocharger. Operating in HCCI mode requires accurate control of the combustion phasing, CA50. The higher the engine torque, the narrower the CA50 window becomes where HCCI operation is maintained. As the CA50 varies stochastically between cycles this requires improved CA50 control for turbo HCCI engines. The main factors affecting CA50 is the mass/temperature of the inducted air and the residuals kept from last engine cycle. The residuals can be controlled by advancing or retarding the timing for exhaust valve closure, EVC. A turbo adds to the overall complexity due to temperature and pressure dynamics introduced over the intake and exhaust manifold. A... (More)

It is tractable to increase the torque for an HCCI engine and one way is to add a turbocharger. Operating in HCCI mode requires accurate control of the combustion phasing, CA50. The higher the engine torque, the narrower the CA50 window becomes where HCCI operation is maintained. As the CA50 varies stochastically between cycles this requires improved CA50 control for turbo HCCI engines. The main factors affecting CA50 is the mass/temperature of the inducted air and the residuals kept from last engine cycle. The residuals can be controlled by advancing or retarding the timing for exhaust valve closure, EVC. A turbo adds to the overall complexity due to temperature and pressure dynamics introduced over the intake and exhaust manifold. A model based CA50 controller is proposed consisting of a feed-forward and a feedback part. A linear state space model is derived from a nonlinear thermodynamic model predicting five states in the cylinder (cylinder temperature, mass oxygen, mass residuals, wall temperature and pressure). The state space model is used for constructing a feed forward filter and a LQG controller for EVC. The controller was successfully tested and evaluated in simulations.

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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Kalman filtering, LQG control, Modeling, NVO, Simulation, Turbo HCCI
in
Proceedings of the 11th IASTED International Conference on Control and Applications, CA 2009
pages
8 pages
conference name
11th IASTED International Conference on Control and Applications, CA 2009
external identifiers
  • scopus:74549135744
ISBN
9780889867949
language
English
LU publication?
yes
id
b2b8d1a8-65fd-47a8-855e-e17460436120
date added to LUP
2017-12-14 17:29:20
date last changed
2018-01-08 11:38:09
@inproceedings{b2b8d1a8-65fd-47a8-855e-e17460436120,
  abstract     = {<p>It is tractable to increase the torque for an HCCI engine and one way is to add a turbocharger. Operating in HCCI mode requires accurate control of the combustion phasing, CA50. The higher the engine torque, the narrower the CA50 window becomes where HCCI operation is maintained. As the CA50 varies stochastically between cycles this requires improved CA50 control for turbo HCCI engines. The main factors affecting CA50 is the mass/temperature of the inducted air and the residuals kept from last engine cycle. The residuals can be controlled by advancing or retarding the timing for exhaust valve closure, EVC. A turbo adds to the overall complexity due to temperature and pressure dynamics introduced over the intake and exhaust manifold. A model based CA50 controller is proposed consisting of a feed-forward and a feedback part. A linear state space model is derived from a nonlinear thermodynamic model predicting five states in the cylinder (cylinder temperature, mass oxygen, mass residuals, wall temperature and pressure). The state space model is used for constructing a feed forward filter and a LQG controller for EVC. The controller was successfully tested and evaluated in simulations.</p>},
  author       = {Aulin, Hans and Johansson, Thomas and Tunestål, Per and Johansson, Bengt},
  booktitle    = {Proceedings of the 11th IASTED International Conference on Control and Applications, CA 2009},
  isbn         = {9780889867949},
  keyword      = {Kalman filtering,LQG control,Modeling,NVO,Simulation,Turbo HCCI},
  language     = {eng},
  pages        = {286--293},
  title        = {Thermodynamic modeling and control of a negative valve overlap turbo HCCI engine},
  year         = {2009},
}