Systematic Design of Multivariable Fuel Injection Controllers for Advanced Diesel Combustion

Abstract

DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:

<inline-formula> <tex-math notation="LaTeX">$\mathcal{H}_{\text{2}}$ </tex-math> </inline-formula>-Norm-Based Multi-Pulse Diesel Fuel Injection Control With Minimal Cyclic Combustion Variation

“…The validity of the model is based on the assumption that the diesel combustion has a negligible amount of internal residual gas, such that each combustion cycle is independent. With certain operating conditions, (3) can be locally approximated with an affine function, which is also validated in [9], [10]. The locally linearized model becomes…”

“…Due to different in-cylinder conditions, wall temperature and injector fueling accuracy, cylinder-to-cylinder variation can be greatly reduced by manipulating the fuel injection timing and duration for each cylinder individually [6]- [8]. In previous work [9], [10], we have demonstrated the feasibility of compensating for both air-and fuel-path disturbances by modifying the fuel injection profile. These robustness results indicate the potential of controlling the fuel injection profile to reduce the deterministic cyclic combustion variations.…”

“…To achieve minimal cyclic variation and stable tracking error dynamics, a control-oriented model is needed to analyze the cyclic combustion behavior. As discussed and validated in [9], [10], the combustion process can be described on a cycle-tocycle basis using the algebraic function…”

“…The operating conditions and the fuel injection parameters are listed in Table I. Instead of individually controlling each pulse, as considered in previous work [9], [10], we simplify the control problem and demonstrate the potential of our methodology by only controlling the injection timing (SOI 2 ) and duration (DOI 2 ) of the main pulse. The injection timing of the pilot (SOI 1 ) and post injection pulse (SOI 3 ) are shifted according to the change of SOI 2 .…”

“…Due to the linear correlations, we fit the steadystate measurement data of individual combustion metric with a first-order polynomial using SOI 2 and DOI 2 as independent variables, which results in two 3-dimensional graphs. Similar observations and methods are included in [9], [10]. The fitting quality is considered satisfying since the coefficient of determination (R 2 ) for CA50 and IMEP is 0.99 and 0.91, respectively.…”