Ifp Energies Nouvelles

Jonathan Chauvin

Thomas Leroy

Alexandre Chasse

Delphine Bresch-Pietri

Yann Creff

Nicolas Henwood

Jérémy Malaize

Benoit Bayon

Ghizlane Hafidi-Rami Yahyaoui

Thomas Le Roy

Benoît Bayon

The invention relates to a combustion engine equipped with a dual supercharging system in which a mechanical compressor is driven by an electric motor. The method controls a combustion engine with the electric motor being controlled by determining a rotational speed setpoint for positive-displacement compressor using a supercharge volume filling model.

Method for controlling a dual-supercharged combustion engine

A method of optimizing the power recovered by a wind turbine by reducing the mechanical impact on the structure is disclosed. A first angle of inclination of the blades allowing the recovered power to be optimized is determined. The aerodynamic force produced on the nacelle when the blades are directed with a first angle is determined. A second angle of inclination of the blades allowing obtaining an aerodynamic force setpoint value is then determined by inverting the aerodynamic force model and using a wind velocity measurement, a rotor velocity measurement and the aerodynamic force setpoint value. Finally, the blades are directed to the second angle.

Method of optimizing the power recovered by a wind turbine by reducing the mechanical impact on the structure

The invention relates to a method for controlling a combustion engine () equipped with a supercharging system, comprising a turbocharger () and a mechanical compressor () and a bypass circuit disposed in parallel with the mechanical compressor comprising a controlled bypass valve (). The method includes:

Method of controlling a combustion engine equipped with double supercharging

The invention is a method for controlling and/or monitoring a wind turbineequipped with a LIDAR sensor. Control and/or monitoring provides an estimation of the wind speed at the rotor obtained an estimator and a LIDAR sensor. The estimator of the wind speed at the rotor is constructed from a representation of the wind, a model of the LIDAR sensor and a model of wind propagation.

Wind turbine control and monitoring method using a wind speed estimation based on a LIDAR sensor

The invention relates to a method for determining the pressure Pupstream of a mechanical compressor () equipped with a double supercharging circuit of a combustion engine. The pressure Pis determined by a dynamic model based on a law of conservation of flow rate in the volume upstream of the mechanical compressor. The model links the pressure Pupstream of the mechanical compressor () to a temperature Tupstream of the mechanical compressor (), to a boost pressure Pand boost temperature Ton the intake side of the engine, and to an openness Bypass of the bypass valve ().

Method of determining a pressure upstream of a compressor for an engine equipped with double supercharging

The invention is a method for controlling a wind turbine to optimize the energy production with an estimation of the incident wind speed Vbeing used to obtain an optimum control (COM). The estimation of wind speed M is achieved by accounting for the dynamics of the system from the measurement of rotor speed the torque imposed on the generator and of orientation of the turbine blades.

Wind turbine control method using an estimation of the incident wind speed

In a method of controlling the combustion of a combustion engine from an estimation of the burnt gas mass fraction in the intake manifold, a measurement relative to a fresh air flow rate or to a burnt gas flow rate is performed upstream from the mixing space where fresh air and burnt gas mix. The burnt gas mass fraction present in the mixing space is then estimated from the measurement and from a model of the mixing dynamics in this space. A transport delay between the space and the intake manifold is estimated. The mass fraction of burnt gas in the intake manifold is then deduced in real time. Finally, combustion is controlled from the burnt gas mass fraction in the intake manifold.

Method of controlling a combustion engine from estimation of the burnt gas mass fraction in the intake manifold

A method is disclosed for controlling a wind turbine by optimizing its production while minimizing the mechanical impact on the transmission. The wind turbine comprises a nacelle provided with a rotor on which blades are fastened and an electrical machine linked to the rotor by a transmission in which pitch angle of the blades is controlled, comprising An aerodynamic torque setpoint and an electrical machine torque setpoint making possible maximizing the recovered power are determined from measurements of wind speed, of rotor speed and of electrical machine speed. At least one of the setpoints is modified by subtracting from it a term proportional to a difference between the measured speed of the rotor and the measured speed of the electrical machine. A pitch angle of the blades making possible production of the aerodynamic torque setpoint is determined. The blades are oriented according to the angle of inclination.

Method for controlling a wind turbine by optimizing its production while minimizing the mechanical impact on the transmission

The invention relates to a method of controlling an internal-combustion engine () equipped with an exhaust gas recirculation circuit and with variable timing means, having a first actuator () and of a second actuator (). The method comprises acquiring a torque setpoint for the engine Tdetermining a position setpoint for the first actuator ()and a position setpoint for the second actuator ()by using a burnt gas flow model (MEGB) that relates the position setpoints of the actuators to the engine torque setpoint T. The burnt gas flow model (MEGB) comprises a cylinder filling model (MR), the burnt gas fraction in the cylinder is controlled by applying position setpointsandto the variable timing means (and).

Method of controlling the burnt gas fraction in an engine cylinder with EGR and IGR

A method of real-time estimation of the intensity of the knocking of an internal combustion engine utilizing a vibratory sensor is disclosed which is useful for control of internal combustion. A vibratory signal representing vibrations of the engine is continuously acquired as a function of the crankshaft angle. A model of a wave equation propagating through the cylinder-head is constructed. The coefficients of a Fourier decomposition of the vibratory signal are determined in real time by inverting the dynamics of the wave equation model using an estimator. The energy contained in the signal is computed by summing the squares of the coefficients of the Fourier decomposition. A parameter correlated with the intensity of knocking equal to the square root of the maximum of the energy is determined in real time.

Method of estimating the intensity of the knocking of an internal combustion engine by inversion of a wave equation

The invention converts wave energy into electrical energy. A device moved by wave action is coupled to an electric machine for generating electrical power and to drive the device to improve conversion of wave action into electrical power. The conversion of the wave energy is improved through real-time estimation of forces exerted by waves on a pendulum axis to estimate the force to be applied to the device by the electric machine acting as an electrical motor.

Method of controlling a device for converting wave energy to electrical energy

The invention relates to a method of controlling a combustion engine () comprising at least one cylinder () and a manifold () and an exhaust gas recirculation (EGR) circuit including an EGR valve. The EGR valve () is controlled by carrying out the following stages: a) measuring a pressure difference &#x394;P in a portion of the exhaust gas recirculation circuit including the EGR valve; b) selecting a burnt gas fraction set point BGRin the intake manifold (); c) calculating an opening set point for the EGR valve () from a pressure drop relation applied in a portion of the exhaust gas recirculation circuit including the EGR valve, depending on difference &#x394;P at the EGR valve and on the burnt gas fraction set point BGRin the intake manifold; and d) controlling the EGR valve () as a function of the opening set point of EGR valve ().

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Paris, France

Jonathan Chauvin