Patents by Inventor Laurent Fontvieille
Laurent Fontvieille has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10106052Abstract: A system and method for controlling rotation speed of an electric motor of an electric or hybrid motor vehicle including a feedback-based regulator for regulating a torque setpoint using a control model, an input variable of the regulator being the torque setpoint as requested by a driver and the regulator using a pure delay.Type: GrantFiled: December 19, 2013Date of Patent: October 23, 2018Assignee: RENAULT s.a.s.Inventors: Laurent Fontvieille, Emmanuel Buis, Petru-Daniel Morosan, Samuel Prat
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Patent number: 10023191Abstract: A method controls a power train of a vehicle immobilized in a parking position, the vehicle being provided with a parking brake device for immobilizing the vehicle and at least one electric motor. The method includes detecting the slope direction and/or slope data when the parking brake device is in an actuated position, detecting that the parking brake device has switched from the actuated position to a released position, and applying a motor torque setpoint to the electric motor in accordance with the detected slope direction and/or slope data.Type: GrantFiled: January 12, 2018Date of Patent: July 17, 2018Assignee: RENAULT s.a.s.Inventors: Laurent Fontvieille, Emmanuel Buis, Florent Marchais
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Publication number: 20180134299Abstract: A method controls a power train of a vehicle immobilized in a parking position, the vehicle being provided with a parking brake device for immobilizing the vehicle and at least one electric motor. The method includes detecting the slope direction and/or slope data when the parking brake device is in an actuated position, detecting that the parking brake device has switched from the actuated position to a released position, and applying a motor torque setpoint to the electric motor in accordance with the detected slope direction and/or slope data.Type: ApplicationFiled: January 12, 2018Publication date: May 17, 2018Applicant: RENAULT s.a.s.Inventors: Laurent FONTVIEILLE, Emmanuel Buis, Florent Marchais
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Patent number: 9944290Abstract: A method controls regenerative braking of a motor vehicle provided with an electric or hybrid powertrain. The method includes determining that a driver is pressing neither a throttle pedal nor a brake pedal of the vehicle. The method also includes determining a correction coefficient as a function of a torque supplied by a motor of the powertrain, of a speed and an angular velocity at a wheel of the vehicle, of a gradient, of a mass of the vehicle, and of friction. Next, the method includes determining a setpoint for regenerative braking without pressure on the brake pedal as a function of the correction coefficient and of two maps of torque as a function of a rotational speed of the powertrain, for a substantially zero gradient and a vehicle mass substantially equal to a reference mass of the vehicle.Type: GrantFiled: November 5, 2014Date of Patent: April 17, 2018Assignee: RENAULT s.a.s.Inventors: Laurent Fontvieille, Emmanuel Buis, Benoit Verbeke
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Publication number: 20170080946Abstract: A method controls a power train of a vehicle immobilized in a parking position, the vehicle being provided with a parking brake device for immobilizing the vehicle and at least one electric motor. The method includes detecting the slope direction and/or slope data when the parking brake device is in an actuated position, detecting that the parking brake device has switched from the actuated position to a released position, and applying a motor torque setpoint to the electric motor in accordance with the detected slope direction and/or slope data.Type: ApplicationFiled: May 13, 2015Publication date: March 23, 2017Applicant: RENAULT s.a.sInventors: Laurent FONTVIEILLE, Emmanuel BUIS, Florent MARCHAIS
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Publication number: 20160264144Abstract: A method controls regenerative braking of a motor vehicle provided with an electric or hybrid powertrain. The method includes determining that a driver is pressing neither a throttle pedal nor a brake pedal of the vehicle. The method also includes determining a correction coefficient as a function of a torque supplied by a motor of the powertrain, of a speed and an angular velocity at a wheel of the vehicle, of a gradient, of a mass of the vehicle, and of friction. Next, the method includes determining a setpoint for regenerative braking without pressure on the brake pedal as a function of the correction coefficient and of two maps of torque as a function of a rotational speed of the powertrain, for a substantially zero gradient and a vehicle mass substantially equal to a reference mass of the vehicle.Type: ApplicationFiled: November 5, 2014Publication date: September 15, 2016Applicant: RENAULT s.a.s.Inventors: Laurent FONTVIEILLE, Emmanuel BUIS, Benoit VERBEKE
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Patent number: 9435714Abstract: A diagnostics method and system for a power plant including at least one low-pressure turbocompressor and at least one high-pressure turbocompressor, the turbocompressors being staged and supplying an internal combustion engine, the power plant being fitted to a motor vehicle. The method includes determining a mode of operation of the power plant, determining a power of the high-pressure turbine based on a first set of data and based on the mode of operation, determining the power of the high-pressure turbine based on a second set of data, determining a failure criterion as being the ratio between the power of the high-pressure turbine dependent on the first set of data and the power of the high-pressure turbine dependent on the second set of data, and comparing the failure criterion against stored values to determine whether there is a failure.Type: GrantFiled: September 11, 2012Date of Patent: September 6, 2016Assignee: RENAULT s.a.s.Inventors: Laurent Fontvieille, Ludovic Martin, Remy Brunel
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Patent number: 9303573Abstract: A system for controlling a diesel internal combustion engine including a circuit for partially recirculating exhaust gases, including a mechanism estimating set values of intake-air parameters; a mechanism estimating richness of the exhaust gas; a mechanism determining a set value of the intake richness according to set values of the intake-air parameters; and a mechanism correcting at least one of the set values of the intake-air parameters according to the estimation of the richness of the exhaust gas and the richness set value.Type: GrantFiled: December 20, 2011Date of Patent: April 5, 2016Assignee: RENAULT s.a.s.Inventors: Laurent Fontvieille, Yohann Petillon, Philippe Moulin, Olivier Grondin
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Publication number: 20150352977Abstract: A system and method for controlling rotation speed of an electric motor of an electric or hybrid motor vehicle including a feedback-based regulator for regulating a torque setpoint using a control model, an input variable of the regulator being the torque setpoint as requested by a driver and the regulator using a pure delay.Type: ApplicationFiled: December 19, 2013Publication date: December 10, 2015Applicant: RENAULT S.A.S.Inventors: Laurent FONTVIEILLE, Emmanuel BUIS, Petru-Daniel MOROSAN, Samuel PRAT
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Patent number: 8931271Abstract: A method for a turbocharger of a heat engine including a turbine, a compressor, and a by-pass actuator that can be used to control an air flow that does not pass through the turbine. The method includes determining a position set point of the by-pass actuator as a function of a compression ratio set point, a compression ratio measurement, a measurement of the rate of flow through the compressor, a measurement of the pressure downstream from the turbine, a measurement of the pressure downstream from the compressor, a measurement of the temperature upstream from the turbine, and a measurement of the temperature upstream from the compressor. The method can be used to control a supercharging device with a single or dual turbocharger.Type: GrantFiled: February 11, 2010Date of Patent: January 13, 2015Assignee: Renault S.A.S.Inventors: Laurent Fontvieille, Arnaud Guinois, Philippe Moulin, Olivier Grondin
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Publication number: 20140230530Abstract: A diagnostics method and system for a power plant including at least one low-pressure turbocompressor and at least one high-pressure turbocompressor, the turbocompressors being staged and supplying an internal combustion engine, the power plant being fitted to a motor vehicle. The method includes determining a mode of operation of the power plant, determining a power of the high-pressure turbine based on a first set of data and based on the mode of operation, determining the power of the high-pressure turbine based on a second set of data, determining a failure criterion as being the ratio between the power of the high-pressure turbine dependent on the first set of data and the power of the high-pressure turbine dependent on the second set of data, and comparing the failure criterion against stored values to determine whether there is a failure.Type: ApplicationFiled: September 11, 2012Publication date: August 21, 2014Applicant: RENAULT s.a.s.Inventors: Laurent Fontvieille, Ludovic Martin, Remy Brunel
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Publication number: 20130289852Abstract: A system for controlling a diesel internal combustion engine including a circuit for partially recirculating exhaust gases, including a mechanism estimating set values of intake-air parameters; a mechanism estimating richness of the exhaust gas; a mechanism determining a set value of the intake richness according to set values of the intake-air parameters; and a mechanism correcting at least one of the set values of the intake-air parameters according to the estimation of the richness of the exhaust gas and the richness set value.Type: ApplicationFiled: December 20, 2011Publication date: October 31, 2013Applicant: RENAULT s.a.sInventors: Laurent Fontvieille, Yohann Petillon, Philippe Moulin, Olivier Grondin
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Patent number: 8571818Abstract: A method of estimating fresh air flow rate entering an engine, for example a diesel engine, supercharged by a turbocharger, including at least one intake manifold of a volume, an exchanger, an air filter, a high-pressure EGR circuit, a low-pressure EGR circuit, an inlet butterfly, an exhaust butterfly, a flow meter, a pressure sensor, a temperature sensor, and a pipe between the flow meter and the inlet of the intake manifold.Type: GrantFiled: September 30, 2009Date of Patent: October 29, 2013Assignee: RENAULT s.a.s.Inventor: Laurent Fontvieille
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Publication number: 20120222417Abstract: A method for a turbosupercharger of a heat engine including a turbine, a compressor, and a by-pass actuator that can be used to control an air flow that does not pass through the turbine. The method includes determining a position set point of the by-pass actuator as a function of a compression ratio set point, a compression ratio measurement, a measurement of the rate of flow through the compressor, a measurement of the pressure downstream from the turbine, a measurement of the pressure downstream from the compressor, a measurement of the temperature upstream from the turbine, and a measurement of the temperature upstream from the compressor. The method can be used to control a supercharging device with a single or dual turbocharger.Type: ApplicationFiled: February 11, 2010Publication date: September 6, 2012Applicant: RENAULT S.A.S.Inventors: Laurent Fontvieille, Arnaud Guinois, Philippe Moulin, Olivier Grondin
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Publication number: 20120016602Abstract: A method for determining, in a turbocharger for supercharging a thermal engine including a turbine and a compressor, the pressure upstream from the turbine based on the inlet air flow, the pressure upstream from the compressor, the temperature upstream from the compressor, the pressure downstream from the compressor, the temperature upstream from the turbine, and the pressure downstream from the turbine.Type: ApplicationFiled: December 14, 2009Publication date: January 19, 2012Applicant: RENAULT SASInventors: Laurent Fontvieille, Nicolas D'Angelo
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Publication number: 20110036333Abstract: A method for controlling an engine that is supercharged by a turbocharger, including calculating a temperature of the gases at the inlet to a compressor of the turbocharger, followed by determining a boost pressure set point, the value of the set point being dependent particularly on the temperature of the gases at the inlet to the compressor calculated in such a way as to set a boost pressure in an inlet manifold of the engine.Type: ApplicationFiled: April 21, 2009Publication date: February 17, 2011Applicant: Renault S.A.SInventors: Laurent Fontvieille, Michael Remingol