Abstract: An electrical connection system for connecting two electrical devices, including at least one elastic contact integral with a first electrical device and in elastic abutment against a second electrical device so as to form an electrical connection. The at least one elastic contact being able to deform in a deformation plane. At least one wall placed so that the elastic contact is placed between the wall and the second electrical device in the deformation plane. The at least one elastic contact, the at least one wall, and the second electrical device being coated in a protective material after assembly.

Abstract: A method for determining the thickness of a tire of a motor vehicle being equipped with at least a tire pressure monitoring sensor placed in contact with the internal wall of the tire facing the tread, including the following steps: at least two successive reference times are determined; at least one instant of passage of a half-deflection angle is determined; the half-deflection angle is determined; then the value of a mean external radius, which radius is estimated in a range of angular positions, is determined; a value of a mean internal radius, which radius is estimated in a range of angular positions, is determined; then the thickness of the tire being the difference between the mean external radius and the mean internal radius.

Abstract: A reception device for receiving a radio signal, designed to estimate a time of arrival of the radio signal. The reception device includes a reception module designed to receive the radio signal, and a detection module configured so as to: measure a current supplied by an electric power source to the reception module, detect a current peak measured by the detection module, the current peak being caused by the reception of the radio signal by the reception module, and determine the time of arrival of the radio signal on the basis of the time of detection of the detected current peak.

Abstract: Disclosed is a method for determining the configuration of a combustion engine of a motor vehicle including a step of detecting the reference position of the crankshaft, a step of controlling the control valve of the injection pump, after a predetermined time interval, a step of measuring a fuel pressure value in the injection rail, and a step of determining a first configuration of the engine when the fuel pressure value measured in the injection rail is greater than or equal to a first predetermined pressure threshold or determining a second configuration of the engine when the fuel pressure value measured in the injection rail is between a second predetermined pressure threshold and a third predetermined pressure threshold.

Abstract: A device for near-field communication with a portable user apparatus, includes: a first communication antenna located on a first carrier; a first device for activating the first antenna located on a second carrier, which is facing the first carrier and mechanically connected to the first carrier by pads. The pads are made of conductive metal and the device also includes: a second antenna, a first winding portion of which is located on one end of the first carrier and a second winding portion of which is located on one end of the second carrier, the two ends facing one another. The first portion and second portion of each winding electrically connected by a pad, the second antenna emitting an electromagnetic field, a main component of which is perpendicular to a main component of the electromagnetic field emitted by the first antenna; and a second device for activating said second antenna.

Abstract: A method for determining the instantaneous frequency and phase of a periodic signal includes: acquiring a periodic signal characteristic of the frequency to be determined and a particular point of which is characteristic of a reference of the phase of the signal; identifying, by optimization, a reference sequence in at least one consecutive portion of the signal; determining a temporal evolution of the frequency of the signal by computing a function of the lag between the identification of the reference sequence in at least one consecutive portion of the signal; determining an instant corresponding to a point characteristic of a reference of the phase of the signal in the course of the period of the signal, and deducing therefrom the temporal evolution of the frequency, the instantaneous phase of the signal with respect to the point characteristic of phase reference.

Abstract: Disclosed is a method for selective catalytic reduction operating by desorbing ammonia from at least one storage cartridge in an exhaust line at the output of a motor vehicle engine, the cartridge being arranged in at least one bypass branch of a main line of the exhaust line. The exhaust gas flow rate in the bypass branch is controlled according to an estimated or measured temperature in the bypass branch and a desired amount of ammonia to be injected by desorption estimated in the exhaust line to provide a catalytic reduction of the nitrogen oxides present in the exhaust gas, a temperature of the cartridge being estimated according to the gas flow rate at the temperature estimated or measured during a given time interval and corresponding to an amount of desorbed ammonia equal to the desired amount of ammonia.

Abstract: Disclosed is a method of alerting to the state of a high-pressure pump of an engine including a relief valve, a threshold pressure defining the opening pressure of the relief valve, the pump supplying fuel under pressure to a chamber equipped with a pressure sensor, including the following steps: initializing a computer when the engine is cut off during which cut-off a threshold pressure and a value of a first counter are collected in a memory associated with the computer; measuring the pressure of the fuel in the chamber; incrementing the first counter if the pressure of the fuel in the chamber is above or equal to the threshold pressure; and triggering an alert when the value of the first counter crosses a predetermined threshold.

Abstract: A tire monitoring system electronic unit suitable for being mounted either on the tire inflation valve or on the internal surface of the tire. The system includes electronics for managing the electronic unit including sensors for measuring parameters of the tire, a microprocessor and a supply battery, and an antenna configured to be mountable on the management electronics; a way of securing the antenna and the electronic managing device to each other; the management electronics thus forming a common base capable of being used with an antenna that can be adapted to the intended location of the electronic unit, either on the tire inflation valve or on the internal surface of the tire.

Abstract: Disclosed is a method for preventing a risk of freezing in a device for supplying reducing agent to a selective catalytic reduction system in an exhaust line, a freezing temperature specific to the agent being stored in memory, the system including a controller operating the system and emitting pulses to an injector, the controller being inactive when the engine is switched off. With the combustion engine switched off, the controller is woken up at predetermined intervals to initiate an emission of a specific electric pulse to the injector with measurements of a current-strength and voltage of the electric pulse providing a value of the electrical resistance of the injector. A temperature of the reducing agent at the injector is estimated as a function of the measured resistance and, when at least the temperature thus estimated is below the freezing temperature, a purge of the device is initiated.

Abstract: A system for detecting command gestures made by a finger of a driver of a motor vehicle, the system including an interface pad, a light source that emits in the infrared toward the pad, an imaging sensor, for capturing images steered by the pad away from the driver, with a base frame and a movable plate, an optical zone of interest seen by the imaging sensor being defined at the interface between the base frame and the plate, the pad including an elastic deformable seal interposed between the base frame and the movable plate, the seal being absorbent at the optical wavelengths of interest, the pad including a reflective strip behind the seal from the point of view of the camera, so that the seal forms a zone that appears dim to the camera, the size of the dim zone depending on the pressure exerted on the plate.

Abstract: A method for adjusting the periodicity of wireless communications between a tire pressure monitoring system for a motor vehicle and a smart device for a user of the vehicle in question is disclosed. On the basis of the position and any movement of the user's smart device in the environment of the vehicle, the periodicity of the alternation, by the different units of the system, of phases of transmission/polling of ultra high frequency signals with standby phases is modified.

Abstract: A method for locating at least one wheel of a vehicle, the wheels each being equipped with an electronic device which sends a wheel rotation signal to a central unit, a speed sensor for each wheel which supplies a signal to the central unit. For each electronic device, at least two sequences of several acquisitions are performed by formation of the signal with simultaneous acquisition by the central unit of the signal transmitted by each speed sensor. A pairing is performed of the two signals for an electronic device with each of the wheel speed signals. For each pair, a phase offset is measured between the two signals. When a constant phase offset is measured in the pairs with a speed sensor, the electronic device associated with the signal is identified as being assigned to the wheel associated with the speed sensor.

Abstract: Disclosed is a camshaft or crankshaft sensor including a toothed target, a measuring cell adapted to supply a raw signal and a processor module having two modes of operation: 1) a measurement mode in which the processor module is adapted to supply an output port of the sensor a measurement signal representing the times of passage of the teeth of the target at the level of the measuring cell; and 2) a diagnostic mode in which the processor module is adapted to supply at the output port of the sensor a diagnostic signal different from the measurement signal and representing the amplitude of the raw signal. Also disclosed is a method and a module for diagnosing such a sensor.

Abstract: A torque sensor mounted on a rotating element in a motor vehicle, including at least one strain gauge and emitting an electrical signal as a function of the torsion experienced by the rotating element, the torque sensor having a moving part intended to be driven in rotation with the rotating element and including the strain gauge and a fixed part including a first printed circuit board. The torque sensor also acts as an angular-position sensor, the moving part bearing angularly distributed targets passing in succession past a first annular sector borne by the first board including a secondary receiver winding generating a sine signal, a secondary receiver winding generating a cosine signal, and a primary emitter winding inducing a voltage in the receiver windings.

Abstract: Disclosed is a method for controlling a DC current converter present in an on-board network of a motor vehicle including a service battery, the on-board network being connected, via the converter, to a traction battery that supplies power to a traction network with inverter and electric machine. When a transmission of power transients from the on-board network to the traction network leading to instabilities in the traction network is detected, an auxiliary mode of control of the converter is implemented with a limit on the current output from the converter depending on a state of charge of the service battery, the current limit increasing as the charge of the service battery decreases.

Abstract: Disclosed is an authentication reader intended to be installed on a motor vehicle opening element, the reader including a microcontroller, at least one transmitter, at least one matching circuit and a single antenna, called “primary” antenna, characterized by a working frequency. The matching circuit includes switching element able to switch the matching circuit between a first mode, in which the matching circuit makes it possible to match the primary antenna to a secondary antenna of an authentication device whose resonant frequency is lower than the working frequency, and a second mode, in which the matching circuit makes it possible to match the primary antenna to a secondary antenna of an authentication device whose resonant frequency is higher than the working frequency.

Abstract: A method for automatic calibration of a camshaft sensor for a motor vehicle. The sensor includes a processing module configured to generate, from a raw signal indicative of the variations in a magnetic field which are caused by the rotation of a toothed target and measured by a cell, an output signal indicative of the moments at which the teeth pass past the cell. The calibration method makes it possible, for each tooth, to determine a switching threshold not only as a function of a local minimum and of a local maximum for the tooth during the preceding revolution of the target, but also as a function of a corrective value calculated from a local maximum and/or a local minimum of the raw signal during the passage of a preceding tooth past the cell during a new revolution.

Abstract: A method for charging a power supply battery of a portable device by near-field communication with a base station. The method, implemented by the device, includes, the primary antenna of the base station and the secondary antenna of the device being electromagnetically coupled, the steps of modifying the coupling between the primary antenna of the base station and the secondary antenna of the device, of receiving an authentication request signal sent by the base station subsequent to the step of modifying the coupling, and of charging the power supply battery of the device from the energy of the received authentication request signal.

Abstract: A system for detecting the operation of the motor or engine of a motor vehicle equipped with at least one tire-pressure-monitoring-system transmitter including: a low-frequency stage including a resonant stage connected in series with an antenna, a processing stage, a first switch and a second switch, the first switch being connected to at least two capacitors so as to control the parallel connection of at least one of the capacitors, the second switch being connected to at least two resistors so as to control the parallel connection of at least one of the resistors, outputs of the low-frequency stage being arranged to receive input from the processing stage, in order to transfer the perceived signal to a processor of the signal, which is configured to compare the level of the perceived signal to a preset threshold level.