Patent application number | Description | Published |
20120029780 | METHOD FOR CONTROLLING A SPEED DIFFERENCE BETWEEN THE FRONT WHEELS AND REAR WHEELS OF A FOUR-WHEEL DRIVE VEHICLE - A method for controlling a speed difference between speed of wheels of a front axle and speed of wheels of a rear axle of a four-wheel drive vehicle. The method: determines an initial speed difference set point based on the speed of the vehicle; determines one or more intermediate speed difference set points based on one or more operational parameters of the vehicle; modulates the initial speed difference set point based on the intermediate speed difference set points to obtain a final speed difference set point; measures the speed difference and compares the measured speed difference with the final speed difference set point; and controls the measured speed difference, so that the measured speed difference reaches the final speed difference set point. | 02-02-2012 |
20120136504 | METHOD FOR DRIVING A GROUP OF VEHICLE MEMBERS ON THE BASIS OF DRIVING SITUATIONS, AND CORRESPONDING DEVICE - A driving method considering driving situations using at least one effective control signal of a member or group of members of an automobile, the method: making an arbitration between different control strategies each corresponding to a driving context, each control strategy being marked with an identifier continuously calculating an optimal control signal corresponding to each of the strategies; continuously transmitting a value representative of the identifier of the selected strategy; detecting if a strategy identifier change has occurred; when a change is detected, generating a time function x(t) increasing from 0 to 1 over a finite time interval starting when the strategy change has been detected; when a strategy identifier change has been detected, transmitting, during at least one time interval following the identifier change, an effective control signal which is the sum of the optimal signal of the control strategy following the last identifier change weighed by the value x(t) and of the optimal signal of the control strategy preceding the last identifier change weighed by the value (1−x(t)). | 05-31-2012 |
20130066531 | METHOD AND DEVICE FOR DISTRIBUTING AN ENGINE TORQUE BETWEEN TWO WHEEL SETS OF A MOTOR VEHICLE - A device distributing engine torque between first and second wheel sets of a vehicle, including a mode switch movable between a first stable position and a second unstable position, activating first and second engine torque distribution modes. When the vehicle stops while the second distribution mode is activated and then restarts after a stop duration, the second distribution mode is activated if the stop duration is less than a time delay, otherwise the first distribution mode is activated. It is determined, in the second distribution mode, whether the vehicle exceeds a predetermined maximum speed threshold. If so, a transition is made to an on-road mode. In the off-road mode, it is determined whether the vehicle exceeds a predetermined intermediate speed threshold, strictly less than maximum speed threshold in an off-road mode, during a time greater than a predetermined duration, to transition back to the on-road mode. | 03-14-2013 |
20130066534 | SYSTEM AND METHOD FOR LIMITING THE ENGINE TORQUE OF A FOUR-WHEEL-DRIVE VEHICLE - A system for limiting engine torque of a four-wheel-drive motor vehicle, including an actuator that is controlled and configured to distribute the engine torque to the drive wheels, a computer calculating at least one variable characteristic of an operation of the vehicle, and a module for limiting the engine torque. In addition, the limitation system includes a mechanism for deactivating the module for limiting the engine torque according to the variable characteristic of the operation of the engine. | 03-14-2013 |
20130066583 | ESTIMATION OF THE TEMPERATURE OUTSIDE A VEHICLE FROM TEMPERATURE MEASUREMENTS UNDER THE BONNET OF A VEHICLE - A method for determining an estimated value of air temperature outside a vehicle driven by an internal combustion engine, according to which an initial estimated value is attributed to an estimated temperature, the temperature of an intake air of the engine is then measured, and a speed of the vehicle is assessed, followed by a mathematical filtering of the measured temperature of the intake air of the engine. The filtering operation imposes a maximum gradient on the estimated temperature, that has at least two separate positive values over time, either one of the maximum positive gradient values being selected according to the momentary speed of the vehicle. | 03-14-2013 |
20130073158 | METHOD FOR CONTROLLING THE OPERATION OF A MEANS OF MECHANICALLY COUPLING THE FIRST AND SECOND AXLES OF A MOTOR VEHICLE - A method controlling operation of a mechanism mechanically coupling first and second axles of a transmission system of a motor vehicle, the first axle being driven as standard and the second axle being driven as an option depending on a status of the coupling mechanism, the transmission system being capable of operating in a first mode in which a value of transmittable torque that can be transmitted by the mechanical coupling mechanism is fixed, or in a second mode in which the value of the transmittable torque that can be transmitted by the mechanical coupling mechanism is higher than the value of the transmittable torque for the first mode. | 03-21-2013 |
20130073167 | TORQUE DISTRIBUTION CONTROL METHOD FOR A FOUR-WHEEL DRIVE MOTOR VEHICLE AND CORRESPONDING VEHICLE - A motor vehicle with four drive wheels mounted on first and second axles, including: a transfer shaft connected to the first axle and a controlled coupling that can transfer part of the torque from the transfer shaft to the second axle; a mechanism determining respective speeds of the first and second axles, and a torque distribution control system configured to determine a slip value representative of the speed difference between the first and second axles and to control the coupling. The torque distribution control system is further configured to control the coupling such as to suppress any torque transfer via the coupling when the average slip value over a pre-determined period exceeds a threshold. | 03-21-2013 |
20130080002 | METHOD OF OPERATING A TRANSMISSION SYSTEM OF AN AUTOMOTIVE VEHICLE OF THE FOUR-WHEEL DRIVE TYPE COMPRISING A MEANS OF MECHANICALLY COUPLING THE FIRST AND SECOND AXLES - A method of operating a transmission system of an automotive vehicle, the transmission system including a mechanism of mechanically coupling first and second axles of the transmission system, a status of the coupling mechanism defining a number of transmission modes. In the method, if the automotive vehicle crosses a speed threshold for a determined length of time, for example between 30 seconds and two minutes, the transmission system switches from a first mode in which the torque that can be transmitted by the mechanical coupling mechanism is fixed, into a different transmission mode. | 03-28-2013 |
20130110312 | METHOD FOR ESTIMATING THE INITIAL TEMPERATURE OF A MECHANICAL MEMBER OF A VEHICLE AT THE START-UP OF THE VEHICLE | 05-02-2013 |
20130110359 | METHOD OF OPERATING A MOTOR VEHICLE TRANSMISSION SYSTEM | 05-02-2013 |
20140244186 | METHOD FOR ESTIMATING THE ROLLING RESISTANCE OF A VEHICLE WHEEL - A method for estimating rolling resistance of a wheel of a moving vehicle, the vehicle including at least two wheels fitted with tires, the method including: measuring or estimating a value of angular velocity Ω of rotation of at least one wheel; and measuring or estimating a value of torque T applied to the wheel; the method using an observer of dynamics of the wheel that is based on a sliding mode control theory, in which input signals are the value of the angular velocity Ω of the wheel and the value of the torque T applied to the wheel. | 08-28-2014 |
Patent application number | Description | Published |
20110290935 | METHOD OF MANUFACTURE BY SUPERPLASTIC FORMING AND BY FISHPLATING OF A RIB FOR AN AERODYNAMIC FAIRING OF AN AIRCRAFT ENGINE MOUNTING PYLON - The present invention relates to a method of manufacture of a stiffening transverse internal rib for an aerodynamic fairing of an engine mounting device, including:
| 12-01-2011 |
20110290936 | METHOD OF MANUFACTURE BY SUPERPLASTIC FORMING AND BY FISHPLATING OF A RIB FOR AN AERODYNAMIC FAIRING OF AN AIRCRAFT ENGINE MOUNTING PYLON - The present invention relates to a method of manufacture of a group of transverse internal stiffening ribs ( | 12-01-2011 |
20130221157 | AIRCRAFT ENGINE PYLON AFT AERODYNAMIC FAIRING - An aircraft engine pylon aft aerodynamic fairing includes upper spars, transverse stiffening ribs, lower spars and a trailing edge where the upper spars and lower spars join together. In this fairing, a profiled structure is formed according to a profile open to the outside of the fairing. In a first end portion, the profiled structure comes to be enclosed between an end portion of the lower spars and the ends of at least one transverse stiffening ribs flush with the lower spars. This structure extends between the lower spars and the upper spars over a straight central portion inclined relative to the first end portion, and comes in a second end portion flush against a portion of the upper spars, parallel to the first end. | 08-29-2013 |
20130320135 | AFT AERODYNAMIC FAIRING WITH IMPROVED THERMAL RESISTANCE FOR A PYLON FOR ATTACHING AN AIRCRAFT PROPELLING ASSEMBLY - An aft aerodynamic fairing for a pylon for attaching an aircraft propelling assembly, including a caisson structure, a heat-shield floor, as well as a support structure for this floor comprising linking parts arranged to link two side edges of this floor to the caisson structure. The linking parts of each side edge of the floor are configured so as to allow travelling motion of the side edge relative to the caisson structure in a corresponding direction included in a plane orthogonal to a longitudinal direction of the fairing. The linking parts form a sliding link between the floor and the caisson structure, reducing the stresses induced by the deformations of these elements in use. | 12-05-2013 |