Institut Francais Du Pe'trole

Total Raffinage Marketing

Fluigent

Ifp Energies Nouvelles

Centre National Detudes Spatiales

Sysnav

Nicolas Petit

David Vissiere

Yann Creff

Pierre Rouchon

Jonathan Chauvin

Gilles Corde

Mériam Chebre

Philippe Moulin

Michel Bernier

Olivier Lepreux

Clémence Vergne

Benjamin Rouffet

Lionel Matthys

Robert Breton

Julien Laurent-Varin

Nicolas Praly

Microfluidic device comprising a tank () supplying a microchannel () with a first fluid (S), and a circuit () in which a flow of a second fluid can be established without contact with the microchannel (). The circuit () passes through the tank () or is connected to the tank () by a pipe (). The circuit () comprises a first on/off valve () mounted in parallel with a first proportional valve (), these first valves () being controllable so as to modify the pressure applied in the tank () to the first fluid (S) by the second fluid.

Microfluidic device

The invention relates to a method and a system for controlling the production of a mixture of constituents, especially a mixture with premix dead volumes. By correcting the matrices for calculating the mixture constituents, used in calculating recipes, by introducing limit, order relationship and equality constraints, it is possible to avoid the drifts observed in certain special cases by the implementation of the method and to improve, on the one hand, the diagnostic assistance and the control of the estimation of the properties so as to limit the deviations from the actual quality of the constituents of the mixture and, on the other hand, the speed of manufacture of the mixture and the robustness of the method. The method and the system according to the invention ensure multivariable regulation feedback by a dynamic observer providing an estimate in real time of the properties of the constituents of the mixture, said estimate being sufficient to guarantee the effectiveness of the feedback loop.

Method and device for producing a mixture of constituents with constraints, especially with premixing

The invention relates to a method and a device for controlling the production of a mixture of components, especially a mixture with premix dead volumes. The method and the device according to the invention ensure multivariable regulation feedback by a dynamic observer providing an estimate in real time of the properties of the components of the mixture, said estimate being sufficient to guarantee the effectiveness of the feedback loop. Thus, the desired properties of the mixture are guaranteed despite large uncertainties in the properties of the components on the one hand, and partial knowledge of the mixing process on the other.

Method and device for controlling production of a mixture of components, in particular a mixture with pre-mix dead volumes

Method of controlling the active regeneration of a particulate filter through dynamic control of the temperature at the outlet of an oxidation catalyst. A control law is defined for a hydrocarbon flow rate at the oxidation catalyst inlet, by means of the ratio between a temperature demand and a gain. The gain can be corrected so as to take account of the transient phenomena that occur in the oxidation catalyst during a gas flow rate variation. The temperature demand can comprise a precompensation term to compensate for the effects of a temperature variation at the oxidation catalyst inlet. The temperature demand can comprise a feedback term calculated by a controller whose parameters are automatically calculated by means of a physical model of the catalyst, during operating conditions variations. Any combination of these terms allows to define a suitable control law. Finally, the hydrocarbon flow rate is modified by applying the control law so that the temperature of the gas leaving said catalyst respects a set point temperature. Application: engine control.

Method and system for controlling active regeneration of a diesel particulate filter

The invention is a method for real-time estimation of the instantaneous engine speed produced by each cylinder of an internal-combustion engine, from an instantaneous engine speed measurement at the end of the engine transmission system. A physical model, representing in real time the dynamics of the transmission system according to the crankshaft angle and to coefficients of a Fourier series decomposition of the instantaneous speed produced by each cylinder, is constructed. These coefficients are determined in real time from coupling between the model and an adaptive type non-linear estimator. The instantaneous speed produced by each cylinder is then deduced from these coefficients. The mean torque produced by each cylinder can also be deduced therefrom. An application is: engine controls.

Method of estimating the instantaneous engine speed produced by each cylinder of an internal-combustion engine

The present invention relates to a method of estimating the fuel/air ratio in each cylinder of an injection internal-combustion engine comprising an exhaust circuit on which a detector measures the fuel/air ratio of the exhaust gas. An estimator based on a Kalman filter is coupled with a physical model representing the expulsion of the gases from the cylinders and their travel in the exhaust circuit to the detector. The method has application to engine controls.

Method of estimating the fuel/air ratio in a cylinder of an internal-combustion engine by means of an extended Kalman filter

The present invention relates to a method of estimating the fuel/air ratio in each cylinder of an injection internal-combustion engine comprising an exhaust circuit on which a detector measures the fuel/air ratio of the exhaust gas. An estimator based on an adaptive nonlinear filter is coupled with a physical model representing the expulsion of the gases from the cylinders and their travel in the exhaust circuit to the detector. The estimator is also coupled with an estimation of the fuel/air ratio measured from at least one variable of said model such as the total mass of exhaust gas and the mass of fresh air. The method has application to engine controls.

Method of estimating the fuel/air ratio in a cylinder of an internal-combustion engine by means of an adaptive nonlinear filter

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Sceaux, France

Nicolas Petit