Showing papers by "Valeo published in 2006"

Vehicle radar sensor assembly

Abstract: A radar electronics module includes a support structure having a first surface having a plurality of recesses with a transmitter circuit board and a receiver circuit board disposed thereon. The transmitter and receiver circuit boards are disposed over the first surface of the supports structure such that transmitter and receive circuits are disposed in cavities on the support structure. The radar electronics module further includes a digital/power supply circuit printed wiring board (PWB) disposed on a second surface of the support structure and a connector disposed on the support structure. The connector is disposed in such a way that it provides electrical connections for at least one of power signals, analog signals or digital signals between at least two of the digital/power supply PWB, the transmitter circuit board and the receiver circuit board.

Process for modulated illumination of a road and headlamp using this process

Abstract: The modular lighting procedure is effected by a headlight containing a number of separate light sources, such as LEDs, each producing a partial beam emitted in a predetermined direction. The partial beams overlap to create the full headlight beam, and one or more of the light sources can be modulated to control the light flow in its partial beam. When the headlight is on a detection system such as a thermal, infra-red or video camera picks out critical zones (V1, V2, P) in the illuminated scene ahead, notably people's heads, vehicles travelling in the same or opposite direction, and road signs, and an electronic circuit adjusts the partial beams accordingly.

Vortex-Shedding Noise and Potential-Interaction Noise Modeling by a Reversed Sears' Problem

Abstract: The classical Sears’ problem of calculating the lift fluctuations, due to the impingement of upstream disturbances on the leading edge of a flat-plate airfoil, is recast in the present paper, essentially by reversing the mean flow carrying the velocity disturbances. The latter are considered to interact with the trailing edge when being evacuated downstream, instead of impinging on the leading edge from upstream, and the Kutta condition is ignored. A compressible solution is proposed, which is a straightforward adaptation of Amiet’s formulation, dedicated to the calculation of the far-field noise. The first application is the narrow-band vortex-shedding noise associated with the von Karman street shed in the wake of a thick plate. For this, a convection speed lower than the surrounding flow speed is accounted for. Once the PSD and the spanwise correlation length of the transverse velocity fluctuations in the near wake are known as input data, the model is shown to predict sound levels, which agree well with the measurements. The second application is the modeling of the potential-interaction noise generated as rotor blades operate in the flow distortion caused by a radial cylinder placed at a short downstream distance. The distortion and the blade loading harmonics are derived analytically. The shrouded tail rotor of an helicopter is investigated as a special case. The effect of a variable blade pitch angle, related to a variable thrust, is assessed. A noise increase by 0.4 dB per degree is found, compatible with previously reported measurements. Both test cases suggest that the proposed model is a reliable pre-design tool for configurations in which the unsteady aerodynamics of blades clearly results from downstream disturbances.

Lighting and/or signaling device for a motor vehicle incorporating a material having thermal anisotropy

Abstract: The device comprises at least one power light emitting diode light source and other means able to constitute one or more heat sources of such a nature as to affect the thermal environment of the light emitting diode light source. In accordance with the invention, the device also comprises a support piece formed at least partially from a material based on anisotropic graphite supporting the light emitting diode light source and opposing an effect of the other means on the thermal environment of the light emitting diode light source. According to other characteristics, the support piece comprises at least one thermal dissipation heat sink and the device can comprise a fan able to force a circulation of air through the heat sink.

Connector for mounting and jointing a wiper blade to a driving arm end

Abstract: The invention relates to the connector (10) of a wiper blade (12) for a driving arm (14), wherein said blade extends in a longitudinal direction and the connector is mountable on the free end (14a) of the arm (14) and comprises a fixing part provided with a reception area (32), which is downwardly opened and makes it possible to removably fixing the wiper (12) to the connector (10) in a vertical direction, and elastically deformable locking means provided with a sector used for longitudinally locking the connector (10) in the mounted position thereof in the free end (14a) of the arm (14). Said invention is characterised in that the fixing sector interacts with a mounting element (24) which differs from the locking means and is fixedly secured to the wiper and the locking means is provided with a longitudinally extending tongue.

Autonomous air-conditioning module intended particularly for the thermal treatment of an area of a vehicle cabin

Abstract: The subject of the invention is a module for ventilating, heating and/or air-conditioning an area ( 5 ) of a vehicle cabin ( 1 ) that is to be thermally treated. This module ( 2 ) comprises a thermal treatment device ( 7 ) which includes an enclosure ( 38 ) and an impeller ( 12 ) and is designed to extract air from the cabin ( 1 ), circulate this air inside the enclosure ( 38 ) and expel the air toward the area ( 5 ) to be treated. A Peltier-type cell ( 18 ) is housed inside the enclosure ( 38 ), the latter comprising a first duct ( 16 ) for circulating the admitted air along the first face ( 21 ) of the Peltier cell ( 18 ), prior to its being expelled toward the area ( 5 ) to be treated, and a second duct ( 17 ) for circulating the admitted air along the second face ( 22 ) of the Peltier cell ( 18 ), prior to its being expelled from the area ( 5 ) to be treated.

Hot-Wire Measurements Around a Controlled Diffusion Airfoil in an Open-Jet Anechoic Wind Tunnel

Abstract: The aeroacoustic measurements in the large anechoic wind tunnel of Ecole Centrale de Lyon, which previously focused on the wall pressure distribution and the far-field acoustic pressure, are extended to velocity measurements by hot-wire probes in the nozzle jet and in the vicinity of a Controlled Diffusion airfoil. The present work focuses on the flow conditions corresponding to a Reynolds number based on the airfoil chord length Re c = 1.6×10 5 and a geometric angle of attack α g of 8°. Midspan measurements were achieved at the exit plane of the wind tunnel nozzle upstream of the test airfoil and in a large eddy simulation domain that was embedded in the potential core around the airfoil mockup. The inlet measurements by a single hot-wire probe provided insight into the free-stream turbulence intensity upstream of the profile. The X-probe measurements on the upper and lower computational boundaries show the overall deflection of the jet potential core by the cambered airfoil. These are compared to previous Reynolds averaged Navier-Stokes predictions. The X-probe measurements in the airfoil wake provide information on the development of the airfoil boundary layer and the resulting wake after separation

Lighting or indicator device, in particular for motor vehicles

Abstract: This invention relates to a lighting or indicator device, in particular for motor vehicles, comprising at least one light source and at least one output optical system in order to form a lighting or indicator lamp beam consistent with regulations. In accordance with this invention the device comprises at least one input optical system comprising a collimating element receiving light rays emitted by the source and transmitting a beam of parallel rays towards an output optical system which forms a lighting or indicator lamp beam.

Natural and Forced Conjugate Heat Transfer in Complex Geometries on Cartesian Adapted Grids

Abstract: The Cartesian incompressible RANS solver with immersed boundaries, IBRANS, recently developed at Stanford, has been extended to include conjugate heat transfer modeling and used for the simulation of the electrical motor of an automotive engine cooling fan system. Such applications are particularly challenging, as they involve very complex geometries with tight tolerances and rotating parts. The new conjugate heat transfer capability of IBRANS has been verified on natural and forced convection flows. The former involves flows in enclosures around a sphere and electronic chips. The latter focuses on heated cylinders for Reynolds numbers covering flow regimes ranging for a steady laminar flow to unsteady turbulent flows. First three-dimensional simulations of the flow and heat transfer within the complete electrical motor are presented

Valve with operating means between two outlet passages

Abstract: A valve has a body, a fluid inlet duct delimited by the body, two fluid outlet ducts into which the fluid inlet duct opens, an intersection formed by the two fluid outlet ducts, a butterfly valve disposed in the intersection, and a motor, to which the butterfly valve is connected, for actuating the butterfly valve between a first extreme position in which the butterfly valve directs the fluid mainly toward the first outlet duct and a second extreme position in which the butterfly valve directs the fluid mainly toward the second outlet duct. The motor is placed between the outlet ducts in the vicinity of a connecting zone connecting the two outlet ducts to one another. The butterfly valve is mounted in front of the connecting zone so that the butterfly valve forms a screen against the fluid for the connecting zone.

Locking device between a wiper blade and a windscreen wiper blade arm

Abstract: The invention concerns a locking device (14, 45, 52, 56, 66) between a windscreen wiper blade arm (2) and windscreen wiper blade (13), said blade (13) consisting of an upper part (15) adapted to co-operate with said wiper blade arm (2) and a lower part (16) directly contacting the windscreen or window to be wiped, said device (14, 45, 52, 56, 66) having a shape complementary to that of said upper part (15) of said blade (13) The invention is characterized in that it is adapted to be secured to linking means (29), said linking means (29) connecting one of the ends of said wiper blade arm (2) to one of the ends of said blade (13)

Connector connecting a wiper blade to a driving arm

Abstract: The invention relates to a connecting device between a wiper blade and a driving arm capable of driving the wiping of the wiper blade on a window or windshield. The inventive device is provided in the form of two plates (18, 19) that can be joined to one another and is characterized in that at least one of these two plates has fixing means (20) having the same axis of rotation (21) according to two distinct positions with regard to at least one of the two plates (18, 19). Advantageously, these fixing means (20) having the same axis of rotation (21) according to two distinct positions are provided in the form of a hole (25) in at least one of the two plates (18, 19).

Method for detecting nocturnal fog and system for implementing the method

Abstract: The invention concerns a system and method for detecting, at night, the presence of an element such as fog interfering with the visibility of a road scene situated in front of a vehicle, comprising the following operations: acquiring an image of the road scene, extracting, from the image of the road scene, at least one light halo produced by a lighting device of the vehicle, approximating a form of this light halo by an elliptic curve, comparing the form of this light halo with the elliptic curve obtained in order to deduce therefrom the presence or absence of an element interfering with visibility.

Projecting pole rotor comprising coil end support plates and rotary electric machine comprising one such rotor

Abstract: A rotor of a rotary electric machine comprising a rotor shaft, a stack of laminations, which is coaxial to the rotor shaft and which comprises at least two radially-projecting poles, a field coil which is wound around each pole, such that the ends of the coil project out axially in relation to each external axial end radial face of the lamination stack and two plates for supporting the lamination stack, which are disposed axially on either side of the stack, housings being provided in the internal radial face of each plate for receiving the coil ends. At least one of the housings comprises a contact surface with the external radial face of the associated coil end.

Headlight lamp holder equipped with claws oriented tangentially with respect to the wall of the lamp holder

Abstract: The invention concerns a lamp holder for a headlight that is intended to carry a lamp. The lamp holder having a roughly cylindrical tubular wall and has at least one claw that is electrically connected to the wall of the lamp holder and that is intended to be in contact with the body of the high-voltage connector, wherein the claw extends in a tangential direction with respect to the wall of the lamp holder and perpendicular with respect to the longitudinal principal axis.

Method for determining the depth of a parking space using ultrasonic sensors and associated system

Abstract: A method for determining the depth of a parking space using at least one ultrasonic vehicle sensor. According to the method, the following steps are carried out as the vehicle drives longitudinally past the parking space: a) an ultrasonic wave is emitted, b) echo signals of the emitted ultrasonic wave are collected within a measuring window, c) the dispersion is determined and/or the distribution of the echo signals within that dispersion is determined, d) a depth is defined if the dispersion range of all and/or several echo signals that form a concentration within the distribution lies below a pre-determinable threshold value.

Rotary electrical machine having loss reduction means

Abstract: In a rotary electrical machine, the stator is subject to eddy currents, causing losses. These losses are reduced by extending the path of the eddy currents whilst avoiding causing saturation. The invention therefore proposes to form recessed zones or slots (2) in the teeth (1) of the stator whose depth does not exceed one-half of the height of the tooth (1).

Wiper blade comprising a support mount, an internal vertebra and a connecting element

Abstract: The invention provides a motor vehicle wiper blade (10), comprising: a support mount (12) which comprises a longitudinal tubular body (18); a structural element (14) in the form of a longitudinal horizontal strip, which is accommodated inside the tubular body (18); and an element (16) for connecting the blade (10) to a drive arm, which is mounted on the support mount (12) and which comprises locking means for locking the structural element (14) in position in the connecting element (16). The locking means of the connecting element (16) comprise, on the one hand, longitudinal means for locking the structural element (14) in position and, on the other hand, angular means for locking the structural element (14) in position.

Electrical rotating machine comprising an intermediate sleeve interposed between the shaft and the polar wheels and method for making the rotor

Abstract: The invention concerns an electrical rotating machine rotor (12), in particular for a motor vehicle, comprising a central shaft (14), an annular core (36) coaxial with the shaft (14) and two polar wheels (20, 22) which are axially arranged on either side of the core (36), of the type wherein the shaft (14) includes at least one drive section (57) which is axially force-fitted into a fixing bore (59) of at least one component (58, 36) of the rotor so as to secure in rotation at least one of the two polar wheels (20, 22) of the rotor (12) to the shaft (14), an intermediate sleeve (58) being radially interposed between each polar wheel (20, 22) and the central shaft (14), and on which sleeve is mounted said polar wheel (20, 22). The invention also concerns a method for making such a rotor.

Device for lighting or signalising, in particular for vehicles

Abstract: A lighting or signalling device, comprising light source(s) (10) and optical output system(s) (16) to form the light beam for illumination or signalling and an optical input system consisting of a collimator (12) receiving light rays from the source and emitting a beam (14) of parallel rays to the output system, includes at least one flat reflecting surface (20) located in the trajectory of the beam of parallel rays

Power Interconnecting Part for Electrical Rotating Machine

Abstract: The invention concerns a power interconnecting part (21) for an electrical rotating machine. The inventive power interconnecting part (21) comprises at least one power trace provided with power electrical terminals (2120, 2110, 217d) designed to co-operate with a power trace (103, 104) of an electronic module (10) so as to distribute an electrical power to said module (10), said module being incorporated on said machine.

Optical module for a motor vehicle lighting device

Abstract: An optical module for a motor vehicle lighting device, capable of emitting at least one type of light beam having a cut-off and comprising: a light source disposed in a reflector; a dioptric element, in particular a convergent lens, disposed in front of the reflector; a shield disposed between said light source and said dioptric element; and an additional optical element is disposed between the light source and the shield.

Compact electric power supply device for a motor vehicle

Abstract: The invention concerns an electric power supply device (10) for a motor vehicle, which is mounted in the motor vehicle and is designed to connect at least one electrical machine (12) capable of operating as an electric engine and/or an electric generator, to a battery (16) of the vehicle, comprising a single housing (32) including cooling means and having a lower part (34) forming a box for receiving at least one electric power storage unit (20).

Selectively controllable heated wash system

Abstract: A selectively controllable heated wash system for a vehicle surface includes a wiper system control module operatively disposed in the vehicle and may be adapted to receive at least one sensed input. A fluid heating module is controlled by the wiper system control module, the heating module adapted to heat fluid therein to a predetermined target temperature, or to a preferred temperature determined as a result of recognition and analysis of the sensed input(s). Fluid is dispensed onto the surface from the heating module manually, according to predetermined parameters, or according to predetermined parameters determined at least in part as a result of recognition and analysis of the sensed input(s).

Electronic Module for Rotating Electrical Machine

Abstract: The invention concerns an electronic module for rotating electrical machine comprising: a housing (101) defined by an upper surface, a lower surface and at least three side surfaces; electronic components (102) arranged in said housing (101). The invention is characterized in that said electronic components are mounted on power connections (103, 104, 105), and in that said power connections include ends which are all arranged proximate a first surface of the housing. The invention is applicable to an alternator starter.

Device for supplying electric power to a motor vehicle

Abstract: The invention concerns a connection box for connecting at least two electric power storage units. The two storage units (12a, 12b) are electrically connected by a connection box (14) mounted at least on one of them, the box containing a circuit of connecting elements providing electrical connections to two separate distribution networks via terminals (20) and to another connector (42).

Signal interconnecting part for electrical rotating machine

Abstract: A dissipator for electronic components, the electronic components being intended for the functioning of a rotary electrical machine, the machine comprising a rear bearing, the dissipator comprising a top face and a bottom face including fins. The present invention applies to any type of polyphase rotary electrical machine, synchronous or asynchronous, such as alternators or alternator starters, and also whether it is a case of electrical machines for motor vehicles and driven for example by belt, with cooling by air, liquid or any other solution that can be envisaged.

Device for managing the supply to a network of power-consuming elements for a motor vehicle

Abstract: The invention relates to a switching unit for a device for managing the supply to a network of power-consuming elements for a motor vehicle, said management device including: a main network (Rp), a main energy storage element (Bp) which is intended to supply the main network (Rp), a secondary network (Rs), and a secondary energy storage element (Ucap) which is intended to supply the secondary network (Rs). According to the invention, the unit is intended to connect the secondary network (Rs) electrically with the secondary energy storage element (Ucap) when the vehicle is in a parking mode. The secondary energy storage element (Ucap) comprises a super-capacitor (Ucap) and includes means (D0, Rp) for pre-charging the secondary energy storage element (Ucap). The invention is suitable for motor vehicles.

Method for the manufacturing of a module or a vehicle headlamp

Abstract: The procedure for designing a dippable lamp with a lens (La) separated by an air gap from a light source with at least one LED consists of selecting a lens with an output surface (As1) that can be linked by smooth and continuous surfaces with the output surfaces of similar modules. The input surface (Ae1) of the lens is shaped to provide a dipped beam without the use of a mask.