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In-Cycle Closed-Loop Combustion Control with Pilot-Main Injections for Maximum Indicated Efficiency

Carlos, Jorques Moreno LU ; Ola, Stenlåås and Per, Tunestål LU (2018) In IFAC-PapersOnLine 51(31). p.92-98
Abstract

An in-cycle closed-loop combustion controller is proposed in this paper. The controller uses a pilot-main injection scheme where the cycle-individual properties of the pilot combustion are estimated by in-cylinder pressure measurements, and used to predict their effect on the heat release shape of the main combustion. The prediction is used to obtain the optimal main SOI that gives the Maximum Reachable Indicated Efficiency (MRE). The optimal law was linearised to obtain a linear controller that adjusts the main SOI and main duration to obtain the MRE given the conditions of each cycle. The controller was implemented in an FPGA and tested on a Scania D13 Diesel engine. The results show that the main SOI control improves the indicated... (More)

An in-cycle closed-loop combustion controller is proposed in this paper. The controller uses a pilot-main injection scheme where the cycle-individual properties of the pilot combustion are estimated by in-cylinder pressure measurements, and used to predict their effect on the heat release shape of the main combustion. The prediction is used to obtain the optimal main SOI that gives the Maximum Reachable Indicated Efficiency (MRE). The optimal law was linearised to obtain a linear controller that adjusts the main SOI and main duration to obtain the MRE given the conditions of each cycle. The controller was implemented in an FPGA and tested on a Scania D13 Diesel engine. The results show that the main SOI control improves the indicated efficiency. However, the linear controller application is limited due to the non-linear behaviour of the system, which is dependent on the fuel type.

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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
diesel combustion, efficiency optimisation, in-cycle closed-loop combustion control, pilot-main injection
in
IFAC-PapersOnLine
volume
51
issue
31
pages
7 pages
publisher
IFAC Secretariat
external identifiers
  • scopus:85056159897
ISSN
2405-8963
DOI
10.1016/j.ifacol.2018.10.018
language
English
LU publication?
yes
id
364d4049-d645-40b9-93a2-0ce57830c1c2
date added to LUP
2018-11-23 08:47:48
date last changed
2021-10-06 05:33:19
@article{364d4049-d645-40b9-93a2-0ce57830c1c2,
  abstract     = {<p>An in-cycle closed-loop combustion controller is proposed in this paper. The controller uses a pilot-main injection scheme where the cycle-individual properties of the pilot combustion are estimated by in-cylinder pressure measurements, and used to predict their effect on the heat release shape of the main combustion. The prediction is used to obtain the optimal main SOI that gives the Maximum Reachable Indicated Efficiency (MRE). The optimal law was linearised to obtain a linear controller that adjusts the main SOI and main duration to obtain the MRE given the conditions of each cycle. The controller was implemented in an FPGA and tested on a Scania D13 Diesel engine. The results show that the main SOI control improves the indicated efficiency. However, the linear controller application is limited due to the non-linear behaviour of the system, which is dependent on the fuel type.</p>},
  author       = {Carlos, Jorques Moreno and Ola, Stenlåås and Per, Tunestål},
  issn         = {2405-8963},
  language     = {eng},
  number       = {31},
  pages        = {92--98},
  publisher    = {IFAC Secretariat},
  series       = {IFAC-PapersOnLine},
  title        = {In-Cycle Closed-Loop Combustion Control with Pilot-Main Injections for Maximum Indicated Efficiency},
  url          = {http://dx.doi.org/10.1016/j.ifacol.2018.10.018},
  doi          = {10.1016/j.ifacol.2018.10.018},
  volume       = {51},
  year         = {2018},
}