Patents by Inventor Frederic Roudeau
Frederic Roudeau 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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Publication number: 20240149861Abstract: A method detects a vehicle overweight state for a vehicle equipped with a power unit including a traction battery. The method selects a number of vehicle acceleration phases. The method includes, for each selected acceleration phase: calculating a mean value of a differential force equal to a value of the traction loads of the unit from which there are subtracted the value of the acceleration resultant force and the value of the sum of the resistive loads experienced by the vehicle, calculating a statistical value based on the calculated mean values of the differential force, and comparing the statistical value against a vehicle overweight threshold value. The vehicle is in an overweight state if the statistical value is higher than the threshold value.Type: ApplicationFiled: March 8, 2022Publication date: May 9, 2024Applicant: RENAULT S.A.SInventors: Abdelkrim MOUJIB, Frederic ROUDEAU
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Patent number: 10688982Abstract: A method controlling a state of a drivetrain including a set of couplers and reducers between a powertrain of a motor vehicle and one or a plurality of drive wheels of the vehicle, the drivetrain configured to take up a plurality of kinematic states each defined by a diagram of engagements of the couplers and reducers making it possible to link an engine of the powertrain to at least one drive wheel, the method including: calculating, before changing the kinematic state, depending on a current speed of the vehicle, a current kinematic state of the vehicle, and an intended kinematic state that is different from the current state, a change-of-state end speed; and comparing the change-of-state end speed with a threshold.Type: GrantFiled: September 22, 2014Date of Patent: June 23, 2020Assignee: RENAULT s.a.s.Inventors: Gregory Planche, Frederic Roudeau, Aurelien Lefevre
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Patent number: 10480645Abstract: A method for controlling an automatic gearbox for a motor vehicle having at least two different drive train states. The method includes: determining minimum deceleration force requirement that needs to be achieved by the drive train state depending on speed of the vehicle, longitudinal acceleration, and resistive forces experienced by the vehicle, then taking a decision to authorize or prohibit the drive train state for which the minimum deceleration force requirement has been calculated depending on the deceleration force setpoint, the current drive chain state, and the minimum force achievable by the drive train state in question.Type: GrantFiled: October 20, 2015Date of Patent: November 19, 2019Assignee: RENAULT s.a.s.Inventors: Florent Le-Cam, Frederic Roudeau, Aurelien Lefevre
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Patent number: 10315646Abstract: A method controls state changes of a drivetrain of a vehicle connecting at least one heat engine and/or one electric motor to the wheels of the vehicle via a transmission, providing the transfer of torque from the heat engine and/or from the electric motor to the wheels in one or more gear ratios. The authorization to switch from a current state to a target state depends on reducing an acceleration of the vehicle in an intermediate state causing a lower acceleration of the vehicle during the transition between the current state and the target state.Type: GrantFiled: November 20, 2015Date of Patent: June 11, 2019Assignee: Renault s.a.s.Inventors: Florent Le-Cam, Frederic Roudeau, Aurelien Lefevre
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Patent number: 10300925Abstract: A method selects a target state of a vehicle driveline connecting at least a combustion engine and/or an electric machine to the wheels of the vehicle by a transmission, from a set of states present on the transmission, which are defined by various combinations of couplers and reduction gears thereof in order to transfer torque from the combustion engine and/or from the electric machine to the wheels over one or more gear ratios. The method includes filtering to determine, from a list of available states, state consecutive eligible sets as a function of combined driveability constraints.Type: GrantFiled: May 4, 2015Date of Patent: May 28, 2019Assignees: RENAULT s.a.s., NISSAN MOTOR Co., Ltd.Inventors: Gregory Planche, Frederic Roudeau
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Publication number: 20180283536Abstract: A method for controlling an automatic gearbox for a motor vehicle having at least two different drive train states. The method includes: determining minimum deceleration force requirement that needs to be achieved by the drive train state depending on speed of the vehicle, longitudinal acceleration, and resistive forces experienced by the vehicle, then taking a decision to authorize or prohibit the drive train state for which the minimum deceleration force requirement has been calculated depending on the deceleration force setpoint, the current drive chain state, and the minimum force achievable by the drive train state in question.Type: ApplicationFiled: October 20, 2015Publication date: October 4, 2018Applicant: RENAULT s.a.s.Inventors: Florent LE-CAM, Frederic ROUDEAU, Aurelien LEFEVRE
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Publication number: 20180186382Abstract: A method is provided for the anticipatory starting of a heat engine in a hybrid power train that includes at least a heat engine, a traction electric machine and an automatic transmission transmitting the drive power to the wheels of the vehicle in at least one initial state of the drive train of same in which the traction machine alone provides the traction of the vehicle and the heat engine is switched off, and at least one other target state in which the heat engine provides tractive power. The method involves sending, to the heat engine, an anticipatory starting request depending on the longitudinal acceleration of the vehicle and the starting time of same, before each change of state of the drive train between an initial state not requiring a started heat engine, and a target state requiring same to be started.Type: ApplicationFiled: January 14, 2016Publication date: July 5, 2018Inventors: Florent LE CAM, Frédéric ROUDEAU
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Publication number: 20170355365Abstract: A method controls state changes of a drivetrain of a vehicle connecting at least one heat engine and/or one electric motor to the wheels of the vehicle via a transmission, providing the transfer of torque from the heat engine and/or from the electric motor to the wheels in one or more gear ratios. The authorization to switch from a current state to a target state depends on reducing an acceleration of the vehicle in an intermediate state causing a lower acceleration of the vehicle during the transition between the current state and the target state.Type: ApplicationFiled: November 20, 2015Publication date: December 14, 2017Applicant: RENAULT s.a.s.Inventors: Florent LE-CAM, Frederic ROUDEAU, Aurelien LEFEVRE
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Publication number: 20170197633Abstract: A method selects a target state of a vehicle driveline connecting at least a combustion engine and/or an electric machine to the wheels of the vehicle by a transmission, from a set of states present on the transmission, which are defined by various combinations of couplers and reduction gears thereof in order to transfer torque from the combustion engine and/or from the electric machine to the wheels over one or more gear ratios. The method includes filtering to determine, from a list of available states, state consecutive eligible sets as a function of combined driveability constraints.Type: ApplicationFiled: May 4, 2015Publication date: July 13, 2017Applicants: RENAULT s.a.s, NISSAN MOTOR Co. LtdInventors: Gregory PLANCHE, Frederic ROUDEAU
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Patent number: 9643596Abstract: A method for controlling a state of a drive train of a power train including at least one motive power source and a set of couplers and reducers of which respective engagements define a plurality of states of the drive train, by engagement of one or a plurality of energy sources in provision of torque and by the ratio of transmission of same to wheels. States targeted from a current state are ranked in real time on the basis of the difference between the motive force available in a current state and in each target state.Type: GrantFiled: March 12, 2014Date of Patent: May 9, 2017Assignee: RENAULT S.A.S.Inventors: Gregory Planche, Frederic Roudeau, Aurelien Lefevre
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Patent number: 9533686Abstract: A method for controlling automatic restarting of a vehicle including an automatic transmission, when the driver releases a brake pedal or pushes an accelerator pedal, the method including: a first phase of cranking an engine during which engine torque starts to increase without being transmitted to wheels of the vehicle, followed by a second launching phase during which the engine torque is gradually transmitted to the wheels, wherein the engine torque is controlled at a torque set value to be transmitted to the wheels, satisfying a launching time objective.Type: GrantFiled: March 27, 2014Date of Patent: January 3, 2017Assignee: RENAULT s.a.s.Inventors: Amine Gourara, Vincent Duvivier, Frederic Roudeau
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Publication number: 20160236673Abstract: A method controlling a state of a drivetrain including a set of couplers and reducers between a powertrain of a motor vehicle and one or a plurality of drive wheels of the vehicle, the drivetrain configured to take up a plurality of kinematic states each defined by a diagram of engagements of the couplers and reducers making it possible to link an engine of the powertrain to at least one drive wheel, the method including: calculating, before changing the kinematic state, depending on a current speed of the vehicle, a current kinematic state of the vehicle, and an intended kinematic state that is different from the current state, a change-of-state end speed; and comparing the change-of-state end speed with a threshold.Type: ApplicationFiled: September 22, 2014Publication date: August 18, 2016Applicant: RENAULT s.a..s.Inventors: Gregory PLANCHE, Frederic ROUDEAU, Aurelien LEFEVRE
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Patent number: 9381921Abstract: A system and method for controlling a free-wheeling motor vehicle including at least one internal combustion engine connected to drive wheels by a transmission. The method includes: determining engine torque at wheels; determining longitudinal acceleration of the vehicle when a free-wheeling driving mode is activated, on the basis of resisting torques on the wheels; determining longitudinal acceleration of the vehicle when the free-wheeling driving mode is deactivated on the basis of the engine torque and the resisting torques on the wheels; determining the difference in longitudinal acceleration between when the free-wheeling driving mode is activated and the free-wheeling driving mode is deactivated; and opening the transmission chain when the longitudinal acceleration difference leans substantially toward a value of zero.Type: GrantFiled: March 27, 2014Date of Patent: July 5, 2016Assignee: RENAULT s.a.s.Inventors: Frederic Roudeau, Amine Gourara
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Publication number: 20160075323Abstract: A method for controlling a state of a drive train of a power train including at least one motive power source and a set of couplers and reducers of which respective engagements define a plurality of states of the drive train, by engagement of one or a plurality of energy sources in provision of torque and by the ratio of transmission of same to wheels. States targeted from a current state are ranked in real time on the basis of the difference between the motive force available in a current state and in each target state.Type: ApplicationFiled: March 12, 2014Publication date: March 17, 2016Applicant: RENAULT s.a.sInventors: Gregory PLANCHE, Frederic ROUDEAU, Aurelien LEFEVRE
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Publication number: 20160046291Abstract: A system and method for controlling a free-wheeling motor vehicle including at least one internal combustion engine connected to drive wheels by a transmission. The method includes: determining engine torque at wheels; determining longitudinal acceleration of the vehicle when a free-wheeling driving mode is activated, on the basis of resisting torques on the wheels; determining longitudinal acceleration of the vehicle when the free-wheeling driving mode is deactivated on the basis of the engine torque and the resisting torques on the wheels; determining the difference in longitudinal acceleration between when the free-wheeling driving mode is activated and the free-wheeling driving mode is deactivated; and opening the transmission chain when the longitudinal acceleration difference leans substantially toward a value of zero.Type: ApplicationFiled: March 27, 2014Publication date: February 18, 2016Applicant: RENAULT s.a.s.Inventors: Frederic ROUDEAU, Amine GOURARA
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Publication number: 20160031446Abstract: A method for controlling automatic restarting of a vehicle including an automatic transmission, when the driver releases a brake pedal or pushes an accelerator pedal, the method including: a first phase of cranking an engine during which engine torque starts to increase without being transmitted to wheels of the vehicle, followed by a second launching phase during which the engine torque is gradually transmitted to the wheels, wherein the engine torque is controlled at a torque set value to be transmitted to the wheels, satisfying a launching time objective.Type: ApplicationFiled: March 27, 2014Publication date: February 4, 2016Inventors: Amine GOURARA, Vincent DUVIVIER, Frederic ROUDEAU
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Patent number: 8335602Abstract: A system for controlling a power propulsion unit of a hybrid type for a four-wheel-drive automotive vehicle that includes at least one electric motor part and at least one thermal engine part capable of driving the independent front and rear driving axles of the vehicle. The system includes a mechanism determining total torque set point from a request of the driver, a mechanism distributing the total torque set point, and a system optimizing the duty point, to dynamically determine the torques to be applied to each of the two driving axles and to optimize fuel consumption of the power propulsion group according to the drivability requested by the driver and driving conditions.Type: GrantFiled: January 7, 2008Date of Patent: December 18, 2012Assignee: Renault S.A.S.Inventors: Francois Fauvel, Tariq Ouaguenouni, Frederic Roudeau
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Patent number: 8112205Abstract: A motor vehicle power train control device capable of furnishing set signals of torque applied to wheels of the motor vehicle. The control device includes a mechanism to generate a signal representing a limitation of variation in speed of a heat engine integrated in a power train capable of reducing variations that are disturbing with regard to acoustics of the power train, and includes a mechanism to determine an operating point of the power train in an optimal operating range according to the signal that represents limitation of speed. The mechanism for generating the signal that represents a limitation of variation in the speed of the heat engine integrated in the power train is furnished, at an input, by parameters that represent characteristics of the motor vehicle and by parameters that represent the driver's wishes.Type: GrantFiled: May 30, 2005Date of Patent: February 7, 2012Assignee: Renault S.A.S.Inventors: Frederic Roudeau, Jean Bretheau, Vincent Vermuse
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Patent number: 7937201Abstract: A device delivers a torque setpoint signal applicable to the vehicle wheels of a motor vehicle including an automatic transmission. The torque setpoint signal has static and dynamic components that are set according to input data supplied by an input unit and based on a recorded list of parameters representing the driver's will, the motor vehicle state, and the environment thereof. The device includes a first unit for computing the dynamic component of a gross torque, a second unit for computing the static component of a gross torque, the second unit being connected to the output of the first unit, and a unit for adaptation to a brake situation producing the static component of the torque adapted to the braking situation according to the list of parameters.Type: GrantFiled: September 5, 2005Date of Patent: May 3, 2011Assignee: Renault s.a.s.Inventors: Frédéric Roudeau, Jean Bretheau, Vincent Vermuse
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Patent number: 7933704Abstract: An automatic transmission of a power train for a motor vehicle capable of producing a set operating speed and a set power train control to attain an engine speed, according to a torque applied to wheels that is adapted to wishes of the driver. The device includes: an input unit that furnishes input data; a control unit having at least two modules according to two distinct driving modes, an automatic mode and a manual mode with pulse control; a processing module for processing signals furnished by a motor vehicle speed control; a selection module that receives signals from the processing module and from the motor vehicle speed control and capable of furnishing a selection signal (mode).Type: GrantFiled: May 30, 2005Date of Patent: April 26, 2011Assignee: Renault S.A.S.Inventors: Frédéric Roudeau, Thomas Turpin