Predictive In-Cycle Closed-Loop Combustion Control with Pilot-Main Injections

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Predictive In-Cycle Closed-Loop Combustion Control with Pilot-Main Injections. / Jorques Moreno, Carlos; Stenlåås, Ola; Tunestål, Per.

In: IFAC-PapersOnLine, Vol. 53, No. 2, 14.04.2021, p. 14000-14007.

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TY - JOUR

T1 - Predictive In-Cycle Closed-Loop Combustion Control with Pilot-Main Injections

AU - Jorques Moreno, Carlos

AU - Stenlåås, Ola

AU - Tunestål, Per

PY - 2021/4/14

Y1 - 2021/4/14

N2 - This paper studies the use of predictive in-cycle close-loop combustion control to reduce the stochastic cyclic variations of diesel combustion. The combustion metrics that fully define the pressure trace with a pilot-main injection i.e. pilot and main start of combustion, burned pilot mass, and engine load are used as the set-point reference. These metrics are in-cycle predicted by calibrated models as functions of the current cylinder state, estimated by in-cylinder pressure measurements. The proposed approach uses four individual controllers for the set-point error minimization, which respectively regulate the injection’s timing and duration of the pilot-main injection. The controllers are implemented in a FPGA and tested in a Scania D13 engine. The steady-state error reduction, disturbance rejection and transient response are discussed. The results confirm the error reduction in both, cycle-to-cycle and cylinder-to-cylinder variations. The error dispersion, measured by the 95% confidence interval, was reduced between 25% and 75% for all the controlled parameters. By on-line adaptation, the controllers are robust against model uncertainties and fuel types.

AB - This paper studies the use of predictive in-cycle close-loop combustion control to reduce the stochastic cyclic variations of diesel combustion. The combustion metrics that fully define the pressure trace with a pilot-main injection i.e. pilot and main start of combustion, burned pilot mass, and engine load are used as the set-point reference. These metrics are in-cycle predicted by calibrated models as functions of the current cylinder state, estimated by in-cylinder pressure measurements. The proposed approach uses four individual controllers for the set-point error minimization, which respectively regulate the injection’s timing and duration of the pilot-main injection. The controllers are implemented in a FPGA and tested in a Scania D13 engine. The steady-state error reduction, disturbance rejection and transient response are discussed. The results confirm the error reduction in both, cycle-to-cycle and cylinder-to-cylinder variations. The error dispersion, measured by the 95% confidence interval, was reduced between 25% and 75% for all the controlled parameters. By on-line adaptation, the controllers are robust against model uncertainties and fuel types.

U2 - 10.1016/j.ifacol.2020.12.920

DO - 10.1016/j.ifacol.2020.12.920

M3 - Article

VL - 53

SP - 14000

EP - 14007

JO - IFAC Proceedings Volumes (IFAC-PapersOnline)

JF - IFAC Proceedings Volumes (IFAC-PapersOnline)

SN - 2405-8963

IS - 2

T2 - 21th IFAC World Congress

Y2 - 12 July 2020 through 17 July 2020

ER -