Abstract: A method of welding conductors to substrates with a stud attached to the substrate consists in welding to the substrate a stud which has the same composition by volume as the conductor and fastening the conductor to the stud by laser spot welding.

Abstract: A device to control an installation for heating, ventilating and/or ai-conditioning a vehicle passenger compartment responds to a set-point set by a passenger and chosen air-heating parameter values. A control module drives actuators to modify the operation of the installation. The device includes a module calculating a comfort temperature for a passenger in the passenger compartment using the stored values of the chosen parameters and by taking into account the set-point. The control module alters the operation of the installation as a function of the comfort temperature which corresponds to the air-heating configuration desired in the passenger compartment.

Abstract: Flat-top antenna emitting and/or receiving an electromagnetic field, particularly for a motor vehicle, formed of multi-strand conductors connected one by one to form turns. The flat-top antenna is positioned on a mechanical support so that it is mainly at right angles to the surface defined by the turns. Hands-free access and starting system may comprise such an antenna.

Abstract: The invention concerns an assembly supported on a base plate forming a radiator or capable of being directly mounted on the base plate, comprising a printed circuit card (1) having its thickness a plurality of holes (5) ensuring heat transfer between one face of said printed circuit card (1), which bears one or several electronic components (2) each enclosed by a box, and a base plate (3). The base plate forms a radiator having a plurality of pads (4a) made of heat conducting material and which run through the printed circuit card (1) over substantially its whole thickness to ensure heat transfer between a face of the printed circuit card (1) and the base plate. The pads (4a) are integral with a sole plate (4) which bears them. The sole plate (4) is interposed between the printed circuit card (1) and the base plate.

Abstract: The method of making secure a hands-free access and/or starting system for a motor vehicle, the hands-free system a control unit (2) placed in the vehicle and a portable identifier (1) suitable for communicating remotely and cordlessly with the control unit in order to be authenticated, the method consists in recording (30) a first data item in the identifier by communicating with the control unit in response to detecting starting of the vehicle engine, and in recording (60) a second data item to replace the first data item in the identifier by communicating with the control unit in response to detecting normal stopping of the vehicle engine. In the case of lending of the vehicle, the borrower of the vehicle must return an identifier containing the second data item in order to prove that he left the vehicle in an authorized manner.

Abstract: An automobile vehicle equipped with a “hands-free” access and/or engine starting system controlled by a management logic subassembly and equipped with a radio receiver subassembly, which includes at the top of the vehicle's steering column a radio antenna and which converts radio signals received by said antenna into signals exploitable by said management logic subassembly to enable it, when it recognizes said signals as coming from an identification device of a predetermined user, to authorize or trigger an operation in the vehicle, said management logic subassembly, said radio receiver subassembly and said antenna being integrated in and interconnected by an electronic board, wherein this electronic board also includes a subassembly providing interfaces with “on-the-column” control and/or signaling parts mounted on the vehicle's steering column or steering wheel and/or on one or more satellite modules mounted on this steering column.

Abstract: A method of welding conductors to substrates with a stud attached to the substrate consists in welding to the substrate a stud which has the same composition by volume as the conductor and fastening the conductor to the stud by laser spot welding.

Abstract: Device for detecting a risk of misting of a motor-vehicle window, and installation including such a device. Measurements are taken and associated with chosen models giving access to an average temperature (on the surface) of the window, for instance the windscreen, and to a dew temperature of the air in the passenger compartment of the vehicle. A comparison between the two temperatures represents a risk of misting of the window.

Abstract: A process for monitoring the rotation of a DC electric motor, wherein the voltage and the intensity of the current supplying the motor are measured in a manner sampled over time and wherein, for each sampling instant tn, an estimate &thgr;n, of the angular position is calculated as a function of a determined or known position for a previous sampling instant and of an estimate of a value of angular speed between these two instants, which is dependent on the voltage and on the intensity of current measured for the sampling instant tn, and/or for one or more previous sampling instants.

Abstract: Process for determination of the position of a door, window or roof of an automobile vehicle, according to which the angular position of the rotor of the electric motor actuating this door, window or roof is determined and the position of the door, window or roof is calculated as a function of the said angular position. The position of the door, window or roof is calculated by correcting a theoretical position that depends on the angular position by a term that takes account of the stiffness of the mechanical transmission between the door, window or roof and the electric motor, this term being a function of the motor power supply current. The device embodying this process is advantageously used in an electric window winder.

Abstract: A security arrangement for motor vehicle equipped with a programmed monitoring system (1) and with at least one specific system (2) to which the monitoring system transmits commands. The arrangement comprises hard-wired logic (4) mounted between a control facility (3) and the specific system, as is the monitoring system. This logic makes it possible to block a command (OV) transmitted by the monitoring system to the specific system, when this command corresponds to that which is obtained in respect of an instruction (C) received by the control facility and when such an instruction has not been received from the control facility by the hard-wired logic. The arrangement is intended to be fitted to a vehicle comprising a programmed monitoring system, such as a “hands-free” monitoring system, and one or more specific systems, for example an electrical anti-theft system or electrical supply monitoring system.

Abstract: A device for retaining a sheath of a remote control via cable has an attachment molded integrally with a support. The attachment has a base part arising from the support to delimit a housing for accommodating a fitting of the sheath, as well as a cover linked to the base part by a film hinge, in such a way that the cover is able to pivot between an opening position for the insertion of the fitting and a locking position for trapping the fitting. In the position for locking the cover, the end fitting is held in the housing, being immobilized axially and free in rotation.

Abstract: A signaling arrangement for a vehicle, in particular motor vehicle, comprising a ring made of translucent or transparent material enclosing the body of an element controlling contact in the vehicle and further comprising element for illuminating the ring. The lighting elements illuminate the ring made of translucent or transparent material in accordance with a lighting mode or another depending on whether the vehicle locking circuit is activated or not.

Abstract: A dual function radio frequency remote control system has a dual function portable emitter, and a receiver carried on a motor vehicle. The signal emitted by the emitter contains a function code in at least two parts at different power levels, and the receiver is adapted to control at least two functions of the vehicle selectively according to the power level of the received signal. If the receiver identifies both parts of the function code, the doors are unlocked. If only one part is received the doors are not unlocked, but the courtesy light or flashing indicators are switched on to enable the vehicle to be located.

Abstract: The electronic circuit which is intended to feed a magnetic field sending coil has a first input terminal (1) for receiving a power-supply voltage (Uhat), a second input terminal (2) for receiving a periodic control signal (SC) within a predefined frequency range, an output terminal (4) for generating an output current (I) in sending coil (L) connected between the output terminal (4) and earth (M), in such a way as to convert the periodic control signal into a periodic magnetic field sent out by a coil. In this electronic circuit, a series RLC circuit (RLCI) is connected between the output terminal (4) and earth in order to form a tuned antenna with the sending coil (L). Such a configuration makes it possible to send out magnetic field according to an extended pattern so that a receiver unit has a better sensitivity.

Abstract: A system for locking/unlocking at least one motor vehicle openable panel comprising transmission/reception devices which are intended for transmitting, from the vehicle, a radio-frequency interrogation signal, which transmission/reception devices are intended to be carried by a user and which, on receipt of the interrogation signal, are intended for transmitting a radio-frequency identification signal so as to actuate the unlocking of the openable panel, which system comprises detection unit which are linked to the transmission/reception devices on the vehicle and which are able to detect, on an identification signal received on the transmission/reception devices, a modification of a parameter of the transmission, between the transmission/reception means of the vehicle and of the user, which may be due to the interposition, between the vehicle and the user, of intermediate transmission/reception devices.

Abstract: The electronic circuit which is intended to feed a magnetic-field sending coil has a first input terminal (1) for receiving a power-supply voltage (Ubat), a second input terminal (2) for receiving a periodic control signal (SC), an output terminal (4) for applying an output voltage (U) at the terminals of the said sending coil (L), in such a way as to convert the said periodic control signal into a periodic magnetic field sent out by the coil. In this circuit, the said output voltage (U) is a periodic signal having a period identical to the period of the control signal (SC), and a duty cycle which depends on the power-supply voltage (Ubat) so that a current flowing in the coil has a peak intensity corresponding to a reference peak intensity. With such a configuration, the range of the magnetic field sent out by then sending coil is not subject to the influences of a variation in the power-supply voltage.

Abstract: A control module for a motor vehicle cab comprising a box, at least one power card and at least one control card placed in said box. The control card extends substantially perpendicularly to the power card, and the box comprises two half-boxes that are closed together and hinged about a hinge. One of the half-boxes has a housing means for receiving tongues and/or female pins which co-operate with the housing means to define connectors, and also having a case which provides protection for the control card.

Abstract: A water-resistant switching device has an elastomeric body overmoulded to one part of the casing. The elastomeric body has a rib which co-operates with a hooked flange portion to define a space for receiving a hooked flange of another part of the casing to provide a watertight seal.

Abstract: The invention concerns a control panel for a motor vehicle system comprising a housing supporting at least a double control unit formed by two rotating knobs arranged projecting relative to the housing and respectively coupled with two shafts, which are capable of being connected to the system elements. One of the shafts bears a coaxial worm screw for driving in rotation a toothed wheel about an axis orthogonal to the shaft axis, said toothed wheel capable of being functionally coupled with a first member of the system, while the other shaft is parallel to the first shaft and is capable of being functionally coupled with a second member of the system. The invention is particularly applicable to heating-ventilating and/or air conditioning systems.