1,721,147 research outputs found
A Two-Time-Scale Infinite-Adsorption Model of Three Way Catalytic Converters during the Warm-up Phase
No full textA Fast Integration Algorithm for Three-Way Catalytic Converters PDE Models
No full textWe present a PDE model of three-way catalytic converters used on commercial gasoline-powered vehicles. In order to speed-up simulation times, we developed a fast integration algorithm based partly on a `method of lines' space-discretization, partly on the `met hod of characteristics' for `quasi linear' hyperbolic PDEs, the separation being allowed by a two time scale analysis of the system
Enhancing the structural stability of LQ optimal controllers via the MCS adaptive algorithm
No full textThis paper discusses the implementation of an LQ control strategy through the use of a Minimal Control Synthesis adaptive algorithm recently presented in the literature. It is shown that by using such approach the structural stability of the closed-loop system can be improved with respect both parameter mismatches and nonlinear perturbations. A case study discussed in the literature on LQ controllers is used to illustrate the strategy presented in the paper
Emission Reduction During TWC Warm-up: Control Synthesis and Hardware-in-the-Loop Verification
No full textAtmospheric pollution caused by automotive vehicles is nowadays a very relevant and open problem. To limit the emissions level, the vehicles are equipped with a three way catalytic converter. Currently the largest amount of pollutants is produced during the warm-up phase when the the catalyst is not activated. In this work we propose a model-based active control strategy, based on an optimal approach, aimed to the fast heating of the catalyst while guaranteing the driver drivability requirements. The effectiveness of the control action is shown via Hardware-In-the-Loop experiments, where the performance of the actual control hardware has been tested in the loop. Here the actual plant is replased by the dSPACE Mid-Size Vehicle Simulator
Optimal Idle Speed Control with Induction-to-Power Finite Delay for SI Engines
No full textWe present an idle-speed controller designed through an optimal LQ technique taking into account during the design phase the presence of a finite time delay between variations in the manifold pressure and in the produced torque. Effectiveness of the scheme and its robustness to underestimation of the delay are shown through computer simulations
DDPG Based End-To-End Driving Enhanced With Safe Anomaly Detection Functionality for Autonomous Vehicles
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