Abstract
Improving modern downsized turbocharged engines requires not only the use of optimized engine components but also the implementation of control algorithms that minimize certain performance indicators such as fuel consumption. This paper proposes a two-input two-output (TITO) tracking control problem to achieve the optimal combustion process while minimizing indicated specific fuel consumption (ISFC) by means of adjusting spark advance (SA) and maximizing the levels of external exhaust gas recirculation (EGR). We show that at a fixed engine speed and various intake manifold pressures, the optimal combustion phase that maximizes piston work is fairly independent of EGR levels. If the crank angle of 50% mass fraction burned (CA50) is used as the combustion phasing indicator, this paper shows that the crank angle duration from spark advance to CA$50 (\Theta ^{\mathrm {S}\mathrm {A}50})$ can be used as the second output of the TITO system without causing directionality or infeasibility problems. Feasibility of the integral control problem using (SA, EGR) as inputs and (CA50, $\Theta ^{\mathrm {S}\mathrm {A}50}$) as outputs is discussed and a simple combustion model is proposed to account for the mean behavior and the cycle-to-cycle combustion variability.
| Original language | English |
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| Title of host publication | CCTA 2019 - 3rd IEEE Conference on Control Technology and Applications |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 412-417 |
| Number of pages | 6 |
| ISBN (Electronic) | 9781728127675 |
| DOIs | |
| State | Published - Aug 2019 |
| Externally published | Yes |
| Event | 3rd IEEE Conference on Control Technology and Applications, CCTA 2019 - Hong Kong, China Duration: Aug 19 2019 → Aug 21 2019 |
Publication series
| Name | CCTA 2019 - 3rd IEEE Conference on Control Technology and Applications |
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Conference
| Conference | 3rd IEEE Conference on Control Technology and Applications, CCTA 2019 |
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| Country/Territory | China |
| City | Hong Kong |
| Period | 08/19/19 → 08/21/19 |
Funding
ACKNOWLEDGMENT The work presented was funded in part by the Advanced Research Projects Agency-Energy (ARPA-E), U.S. Department of Energy, under Award Number DE-AR0000659, for which we are thankful. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. The work presented was funded in part by the Advanced Research Projects Agency-Energy (ARPA-E), U.S. Department of Energy, under Award Number DE-AR0000659, for which we are thankful. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.