Ifp Energies Nouvelles

Thomas Leroy

Jonathan Chauvin

Alexandre Chasse

Delphine Bresch-Pietri

Maxime Jean

Fabien Vidal-Naquet

Mateos Kassa

The present invention relates to a method of controlling a positive-ignition internal combustion engine, in which the ignition advance is controlled (CON) by means of an estimation (EST) of the distribution of the knock measurements (MEAS). This estimation (EST) makes it possible to determine, for these measurements (MEAS), a confidence interval (q, q) of a predetermined quantile of the distribution of the knock measurements (MEAS).

Method of controlling a positive-ignition internal combustion engine by means of a knock estimator

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

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 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

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

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

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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Saint Germain-en-Laye, France

Thomas Leroy