Robust multivariable feedback control of natural gas-diesel RCCI combustion

A. Indrajuana, C. Bekdemir, X. Luo, F.P.T. Willems

Research output: Contribution to journalConference articleAcademicpeer-review

11 Citations (Scopus)
15 Downloads (Pure)


Advanced combustion concepts such as Reactivity Controlled Compression Ignition (RCCI) demonstrate very high thermal efficiencies combined with ultra low NOx emissions. As RCCI is sensitive for operating conditions, closed-loop control is a crucial enabler for stable and robust combustion. The feedback design is complex due to the coupling between inputs, such as intake manifold temperature, blend ratio (BR), and air-to-fuel ratio (λ), and, on the other hand, combustion parameters. Contrary to earlier, parallel SISO approaches, a multivariable feedback control strategy is applied, which uses a new combination of control parameters. Following the linearisation of a validated multi-zone RCCI combustion model, a MIMO feedback control strategy is designed. This cycle-to-cycle control strategy uses diesel injection timing, diesel fuel quantity, and natural gas (NG) fuel quantity information to track the desired engine load, ignition delay, and a new control parameter: BR. The designed controller is validated with simulation cases for disturbance rejection and simultaneous multivariable reference tracking. Simulation results demonstrate robust performance, effective decoupling action, and fast settling time (within 3 engine cycles) of the designed controller.
Original languageEnglish
Pages (from-to)217-222
Issue number11
Publication statusPublished - 23 Jun 2016
EventIFAC International Symposium on Advances in Automotive Control - Kolmarden, Sweden
Duration: 20 Jun 201623 Jun 2016

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