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Automated engine calibration of hybrid electric vehicles

Nikolce Murgovski (Institutionen för signaler och system, Mekatronik) ; Markus Grahn (Institutionen för signaler och system, Signalbehandling) ; Lars Johannesson (Institutionen för signaler och system, Reglerteknik) ; Tomas McKelvey (Institutionen för signaler och system, Signalbehandling)
IEEE Transactions on Control Systems Technology (1063-6536). Vol. 23 (2015), 3, p. 1063-1074.
[Artikel, refereegranskad vetenskaplig]

We present a method for automated engine calibration, by optimizing engine management settings and power-split control of a hybrid electric vehicle. The problem, which concerns minimization of fuel consumption under a NOx constraint, is formulated as an optimal control problem. By applying Pontryagin's maximum principle, this study shows that the problem is separable in space. In the case where the limits of battery state of charge are not activated, we show that the optimization problem is also separable in time. The optimal solution is obtained by iteratively solving the power-split control problem using dynamic programming or the Equivalent Consumption Minimization Strategy. In addition, we present a computationally efficient suboptimal solution, which aims at reducing the number of power-split optimizations required. An example is provided concerning optimization of engine management settings and power-split control of a parallel hybrid electric vehicle.

Nyckelord: Hybrid electric vehicle, engine management system, engine calibration, optimal control



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Denna post skapades 2014-09-29. Senast ändrad 2015-07-28.
CPL Pubid: 203412

 

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