Valeo Systemes De Controle Moteur

Vitesco Technologies Gmbh

Nicolas Vitiello

Grégory Hodebourg

Sébastien Adenot

Sébastien Potteau

Damien Fournigault

Frédéric Cousin

Frederic Cousin

Loic Violette

Anthony Lelarge

Mathieu Bitauld

A three-way valve configured to provide the connection between a gas intake circuit and an exhaust gas recirculation circuit is disclosed. The valve includes a first shutter for regulating the airflow rate, a second shutter for regulating the recirculated exhaust gas flow rate, a single motor for driving the two shutters, and gearing connecting the motor to at least one shutter. The gearing includes functionality to drive the at least one shutter.

Method for controlling an EGR circuit of a motor vehicle engine, valve for implementing said method, and engine having said valve

The invention relates to a method for controlling an exhaust gas recirculation circuit () for an internal combustion engine (M) of a motor vehicle. The engine (M) is linked to an air intake circuit () and to a gas exhaust circuit () linked to the air intake circuit () by the recirculation circuit (). A first valve () controls the flow of air upstream from the recirculation circuit (), and gases that are recirculated within the a second valve () controls the flow of exhaust recirculation circuit (). In the method of the invention, the recirculation of the exhaust gases is in particular controlled by means of measuring a pressure difference across the terminals of the second valve (). The method comprises the following steps: a) the first and second valves () are closed, the first valve () being arranged so as to allow, in a closed position, the passage of an air leak current; b) the first and second valves () are concomitantly opened so as to provide a sufficient pressure difference across the terminals of the second valve () so as to enable the measurement of the pressure difference in the terminals thereof. Due to the invention, the pressure difference across the terminals of the second valve () remains sufficiently high so as to allow the efficient measurement of said pressure difference.

The invention relates to a method for managing an exhaust gas recirculation circuit of a petrol thermal engine, the engine including at least one combustion chamber connected to an inlet line and an exhaust line between which extends said recirculation circuit, the recirculation circuit including a flow-rate adjustment valve, wherein said method comprises the step of adjusting flow-rate adjustment valve based on a flow-rate setpoint, said method further comprising the steps of: detecting an operation parameter representative of a pressure difference between an upstream pressure and a downstream pressure relative to the flow-rate adjustment valve, and, after comparing the parameter with a threshold corresponding to a minimum pressure difference, adjusting the flow-rate in at least one of the lines in order to increase the pressure difference.

Method for managing the exhaust gas circulation circuit of a petrol thermal engine and corresponding recirculation system

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Paris, France

Nicolas Vitiello