Abstract: Automobile vehicle fitted with a dedicated communication system provided with an antenna (4) and enabling exchanges of data signals within a communication area corresponding to the antenna radiation area, forming a volume with a chosen shape and dimensions. The antenna is an air antenna that forms an elongated loop around a console (3) located on the floor (5) in the automobile vehicle passenger compartment, and that delimits a communication area with a determined shape and extension inside the passenger compartment.

Abstract: The invention relates to a control circuit, in particular for a load in an automotive vehicle, comprising a chopping circuit, at least one LC filter (F1) means (20) opposing the saturation of the inductor, (L1) of this LC circuit, wherein these latter means (20) are provided so as to prebias the inductor in a chosen direction.

Abstract: A device, particularly for the instrument panel of a motor vehicle, comprises a liquid crystal display module comprising a multiplicity of parallel inputs connected via a multiplicity of control lines to a multiplicity of outputs of a control module supplied by an electrical power supply. The output of the display module and the electrical power supply are connected to an electrical ground. A branch line has, on the one hand, an input connected to the electrical power supply and an output connected directly to the output of the display module, and has, on the other hand, an impedance considerably lower than the corresponding impedance of each pair formed by a control line and the output of the associated control module. The device is thus protected against electrostatic discharges.

Abstract: The invention concerns a device for mechanically locking with respect to a support an electronic component soldered on a printed circuit card directly mounted on said support. The invention comprises a main wall designed to rest against a support wall and at least an elastic tab forming a U-shaped back loop relative to said main wall, said main wall and said elastic tab bearing matching means for maintaining said tab in a position wherein it is compressed towards said main wall, said matching means being capable of being disengaged relative to one another by the effect of a tool actuated by an operator, said elastic tab being then released to be urged against the component.

Abstract: A control panel or control unit for a motor vehicle heating and air conditioning circuit comprises a body having a front panel, and contains a printed circuit which comprises a front circuit board located behind the front panel and having an aperture, together with a computer circuit board which makes an angle with the front circuit board. The computer circuit board has an extension portion which passes through the aperture in the front circuit board, and this extension portion carries a display device which is located behind an aperture formed through the front panel. Retaining means, for example adjustable fastening means, are interposed between the computer circuit board and the body so as to secure the display device in a defined position with respect to the front panel.

Abstract: An indicator light for a motor vehicle includes a circuit comprising a printed circuit, a network of light emitting diodes carried by the printed circuit, and two power supply wires connected to the network. At least one of the power supply wires is a resistive wire having a linear resistance greater than 1 ohm per metre, the length of this wire being such that it provides regulation for the supply current to the diodes.

Abstract: A method for detecting vibrations generated by the running of a tire on a safety insert, wherein a vibration signal is measured within a given frequency band and the measurement thus made is processed to detect a mode of resonance generated by this running. The energy of the signal measured by a sensor in two frequency bands, one being narrow and the other being wide, which are centered on the same line of the mode of resonance, is determined. The ratio of these two energies is compared with a given warning threshold.

Abstract: A motor vehicle heating, ventilating and/or air conditioning installation has a control panel comprising a light box which consists of a housing comprising a housing member with an open side closed by a front wall of the control panel, and a light source within the housing. The front wall is of translucent material made opaque on its front face except in lighting zones which define illuminated indicia. Some of the lighting zones have a first thickness, while others are of different thicknesses, so that the luminance of the lighting zones at the front face of the front wall is modified locally. In this way, imperfections in the light box arising from differences in luminance in the illuminated indicia can be compensated for.

Abstract: A motor vehicle air conditioning installation has a cold loop, a hot loop, a sensor for measuring cabin temperature, a manual setting unit for setting demand values of cabin air parameters, and a control unit for defining the resulting required adjustments to be made to the various components of the cold and hot loops. The control unit includes a temperature estimating module which generates an estimated value of the outside temperature, either from (a) the measured value of cabin temperature (in stabilized operation of the installation), or (b) a temperature value stored in a sub-memory of the control unit (when the installation is converging towards its stabilized mode).

Abstract: In accordance with the method, the received signal is quadrature demodulated by mixing it with two signals with a relative phase difference of .pi./2 and having the same frequency as the emitted carrier, the absolute value of each of the demodulated signals of each pair of signals obtained is compared to a respective threshold to determine valid pairs if the absolute value of at least one of the two demodulated signals is higher than the threshold and invalid pairs otherwise and the number of successive rotations of the vector whose coordinates correspond to the values of the signals of the successive valid pairs is counted. For each invalid pair the value of the count is progressively reduced. The alarm is tripped if the value of the count reaches a given threshold.

Abstract: In an electric motor which includes an electronic control device and an armature within a closed motor casing, the electronic control device is arranged within the casing, in a position offset axially from but close to the armature. The motor includes a thermal screen which is interposed axially between the armature and the control device, and the screen includes means for dissipating heat outside the casing.

Abstract: A self-propelled vehicle alternator used both as a generator and as an electric motor for starting the engine of the vehicle. A coil-carrying rotor and a multiphase stator connected to a bridge of diodes and switches for rectifying and controlling the phases cooperate for selective operation as a generator or starting motor. A control unit for the switches recognizes a code signal transmitted by a code transmitter and controls the phases of the stator to cause the alternator to operate as an electric motor and start the engine only if it receives a code signal from the transmitter authorizing starting.

Abstract: A motor vehicle power steering system includes a hydraulic pump, an electric motor for driving the pump, and a control unit for controlling the electric motor. The control unit includes means for controlling the power supply voltage applied to the electric motor so that said voltage increases up to a maximum value when the load impedance decreases from its unloaded value, and is at a low value when said load impedance is in the vicinity of its unloaded value.

Abstract: A three-phase synchronous electric motor, especially a motor of a motorized fan unit for a motor vehicle, includes a synchronizing device in which the energizing signal for the three phases of the motor is synchronized with the rotational position of the rotor. The energizing signals are synchronized with a single position signal representing the rotational position of the rotor, and, in order to start the motor, its three phases are supplied with three energizing signals out of phase one with another by 2.pi./3; if the motor then fails to start, the energizing signals are phase shifted by 2.pi./3.

Abstract: The invention concerns a rotary contactor comprising a fixed casing which houses a movable hub and a flexible strip attached at one end to the hub and at its other end to the casing. An internal rotor is disposed radially between the hub and the internal bore of the casing. A planetary gear train supported by the casing, the internal rotor and the hub is provided for rotating the internal rotor via the hub. The internal rotor comprises means for the passage of the flexible strip. The invention is useful for motor vehicles.

Abstract: The power supply to a starter of a motor vehicle engine is cut off when the power supply voltage to the starter reaches a threshold value. On closing of the starter power contacter, a time window is commenced, and during this time window the maximum value assumed by the supply voltage is measured. The threshold value is determined as a function of the maximum value measured during this time window, and may also be a function of the value of the supply voltage prior to initiation of the starting process, and/or a function of operating temperature.

Abstract: A control device for a three-phase motor of a fan for a motor vehicle includes a current generator for the armature winding of the motor corresponding to each phase. Each current generator receives an input command signal such that the vector defined by the current intensities generated by the current generators is proportional to the vector V-ZI where V is a vector defined by the different voltages measured for the windings, I is a vector defined by the different currents measured for the windings, and Z is an operator corresponding to the impedance of the windings.

Abstract: An assembly, in particular for the power supply circuit of a discharge lamp in a motor vehicle headlight, the assembly comprising a wound transformer together with a printed circuit on which said transformer is mounted, wherein said printed circuit is mounted on a metal soleplate forming a heat sink and wherein the ferrite element(s) of the transformer is (are) in thermal contact through its (their) whole surface directly facing the metal soleplate, with the printed circuit or with the metal soleplate.

Abstract: A synchronous electrical machine comprising a rotor and a stator, each having a plurality of notches, wherein the rotor is a stack of laminations without conductor windings and without permanent magnets, and wherein the stator has magnetizing means defining at least one pair of poles thereon, while the notches of said stator receive at least one secondary winding.

Abstract: A rotary contactor, comprising two coaxial parts which are mounted for movement in rotation of one with respect to the other against a flexible tape (8) providing electrical connection and wound between the said parts (2, 7) by being attached at one of its ends to one of the said parts and at its other end to the other said part, in which one of the said parts (2, 7) comprises a rotatable hub (2) and the other part a fixed hollow housing (7), in the interior of which the hub (2) is mounted, the said contactor including, firstly, a rotor (5) mounted for rotation in the housing (7), and secondly, an epicyclic gear train (40, 4, 20) carried by the housing (7) and by the hub (2) and the rotor (5), for driving the rotor (5) in rotation through the hub (2) and for reducing the number of turns between the hub (2) and the housing (7), the rotor (5) carrying, for rotation on the rotor, a pinion (4) adapted to mesh with a set of teeth (40) formed in the interior of the housing (7) and a set of teeth formed on the hub (