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Energies 2016, 9(1), 58; doi:10.3390/en9010058

Diesel-Minimal Combustion Control of a Natural Gas-Diesel Engine

Institute for Dynamic Systems and Control, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
Author to whom correspondence should be addressed.
Academic Editor: Jihong Wang
Received: 9 September 2015 / Revised: 29 December 2015 / Accepted: 11 January 2016 / Published: 19 January 2016
(This article belongs to the Special Issue Energy Efficient Actuators and Systems)
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This paper investigates the combustion phasing control of natural gas-diesel engines. In this study, the combustion phasing is influenced by manipulating the start and the duration of the diesel injection. Instead of using both degrees of freedom to control the center of combustion only, we propose a method that simultaneously controls the combustion phasing and minimizes the amount of diesel used. Minimizing the amount of diesel while keeping the center of combustion at a constant value is formulated as an optimization problem with an equality constraint. A combination of feedback control and extremum seeking is used to solve this optimization problem online. The necessity to separate the different time scales is discussed and a structure is proposed that facilitates this separation for this specific example. The proposed method is validated by experiments on a test bench. View Full-Text
Keywords: internal combustion engine; dual fuel; natural gas; diesel; engine control; combustion control; closed-loop control; extremum seeking; optimization internal combustion engine; dual fuel; natural gas; diesel; engine control; combustion control; closed-loop control; extremum seeking; optimization

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zurbriggen, F.; Hutter, R.; Onder, C. Diesel-Minimal Combustion Control of a Natural Gas-Diesel Engine. Energies 2016, 9, 58.

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