FR2901757A1 - Motor vehicle`s collision energy absorption module, has beam with end zones supported on parts of vehicle body so that beam absorbs energy of collision with pedestrian by flexion, and foot that extends from median zone of beam - Google Patents

Motor vehicle`s collision energy absorption module, has beam with end zones supported on parts of vehicle body so that beam absorbs energy of collision with pedestrian by flexion, and foot that extends from median zone of beam Download PDF

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Publication number
FR2901757A1
FR2901757A1 FR0605023A FR0605023A FR2901757A1 FR 2901757 A1 FR2901757 A1 FR 2901757A1 FR 0605023 A FR0605023 A FR 0605023A FR 0605023 A FR0605023 A FR 0605023A FR 2901757 A1 FR2901757 A1 FR 2901757A1
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France
Prior art keywords
foot
collision
energy
flexion
vehicle
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Granted
Application number
FR0605023A
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French (fr)
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FR2901757B1 (en
Inventor
Laurent Waxin
Pierre Lhuillier
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Centre dEtude et de Recherche pour lAutomobile CERA
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Centre dEtude et de Recherche pour lAutomobile CERA
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Priority to FR0605023A priority Critical patent/FR2901757B1/en
Publication of FR2901757A1 publication Critical patent/FR2901757A1/en
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Publication of FR2901757B1 publication Critical patent/FR2901757B1/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34Protecting non-occupants of a vehicle, e.g. pedestrians
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D25/00Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08Front or rear portions
    • B62D25/081Cowls
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34Protecting non-occupants of a vehicle, e.g. pedestrians
    • B60R2021/343Protecting non-occupants of a vehicle, e.g. pedestrians using deformable body panel, bodywork or components

Abstract

The module has a body (1) that is formed by thermoforming a plate made of phenolic sheet or glass wool. An energy absorption beam (2) is made by injection of a polymeric material and supported on the body. The beam has end zones supported on parts of a body of a motor vehicle so that the beam absorbs energy of a collision with a pedestrian, by flexion. A foot (4) extends from a median zone of the beam. The body and the beam are longitudinally supported on each other. The foot is supported on a support for limiting flexion of the beam in case of a collision.

Description

1 L'invention concerne un module d'absorption d'énergie destiné à êtreThe invention relates to an energy absorption module intended to be

monté entre le capot sur moteur d'un véhicule automobile et le pare-brise dudit véhicule.  mounted between the engine hood of a motor vehicle and the windshield of said vehicle.

Il est connu de disposer dans les véhicules automobiles, sensiblement en dessous de la zone de jonction entre le pare-brise et le capot, un module comprenant un corps qui s'étend sensiblement selon la largeur du pare-brise. En particulier, un tel corps contribue à remplir plusieurs fonctions telles que l'absorption acoustique, la collecte d'air pour le système de ventilation / climatisation du véhicule, l'étanchéité dans la zone de jonction ainsi que la collecte d'eau.  It is known to have in the motor vehicles, substantially below the junction area between the windshield and the hood, a module comprising a body which extends substantially along the width of the windshield. In particular, such a body contributes to fulfill several functions such as sound absorption, air collection for the ventilation / air conditioning system of the vehicle, sealing in the junction area and the collection of water.

Du fait de la présence du corps, on a proposé de pourvoir également le module avec une poutre qui est destinée à absorber de l'énergie d'un choc par flexion.  Due to the presence of the body, it has been proposed to provide the module also with a beam which is intended to absorb the energy of a bending shock.

En effet, les normes de sécurité imposent de prévoir des moyens permettant de limiter les lésions qui pourraient être occasionnées en cas de choc entre un piéton et les organes présents à l'avant du véhicule.  Indeed, the safety standards require to provide means to limit injuries that could be caused in case of collision between a pedestrian and the bodies present at the front of the vehicle.

Toutefois, compte tenu notamment de sa longueur, le dimensionnement de la poutre ne permet pas de répondre parfaitement aux normes de sécurité. En effet, une poutre rigide ne remplit pas sa fonction de façon satisfaisante en parties extrêmes et une poutre souple présente une trop grande flexion en partie centrale. Par conséquent, selon l'art antérieur, le dimensionnement de la poutre ne peut pas être réalisé de façon à conférer une absorption d'énergie optimale, notamment sur toute la longueur de la poutre.  However, especially given its length, the dimensioning of the beam does not meet the safety standards perfectly. Indeed, a rigid beam does not perform its function satisfactorily in extreme parts and a flexible beam has too much bending in the central part. Therefore, according to the prior art, the dimensioning of the beam can not be carried out so as to provide optimum energy absorption, especially over the entire length of the beam.

L'invention a notamment pour but de résoudre ce problème technique en proposant un module d'absorption d'énergie qui est agencé pour pouvoir remplir sa fonction de façon optimale. A cet effet, l'invention propose un module d'absorption d'énergie destiné à être monté entre le capot sur moteur d'un véhicule automobile et le pare-brise dudit véhicule, ledit module comprenant un corps et une poutre d'absorption30 2 d'énergie disposée en appui sur ledit corps, ladite poutre comprenant deux zones extrêmes destinées à venir en appui sur la caisse du véhicule de sorte que la poutre puisse absorber de l'énergie d'un choc par flexion. Le module comprend en outre au moins un pied s'étendant depuis sensiblement la zone médiane de ladite poutre, ledit pied étant agencé pour venir en appui sur un support de sorte à limiter la flexion de ladite poutre en cas de choc.  The invention aims in particular to solve this technical problem by proposing an energy absorption module which is arranged to perform its function optimally. For this purpose, the invention proposes an energy absorption module intended to be mounted between the engine hood of a motor vehicle and the windshield of said vehicle, said module comprising a body and an absorption beam. energy beam disposed on said body, said beam comprising two end zones intended to bear against the vehicle body so that the beam can absorb the energy of a shock bending. The module further comprises at least one foot extending substantially from the median zone of said beam, said foot being arranged to bear on a support so as to limit the bending of said beam in case of impact.

Ainsi, la présence du pied permet de dimensionner la poutre de façon optimale relativement à l'absorption d'énergie par flexion, tout en limitant ladite flexion notamment en partie centrale. En outre, la présence du pied contribue à absorber de l'énergie en cas de choc.  Thus, the presence of the foot makes it possible to dimension the beam optimally relative to the energy absorption by bending, while limiting said bending, particularly in the central part. In addition, the presence of the foot helps to absorb energy in case of shock.

D'autres particularités et avantages de l'invention apparaîtront dans la description qui suit, faite en référence aux figures jointes dans lesquelles : • la figure 1 est une représentation en perspective de dessous d'un module d'absorption d'énergie selon un mode de réalisation ; • la figure 2 est une représentation en perspective de dessus du module selon la figure 1 • la figure 3 est une représentation en perspective de dessous du module de la figure 1 dans son environnement de montage ; • la figure 4 est une représentation en coupe transversale selon AA de la figure 3.  Other features and advantages of the invention will appear in the description which follows, made with reference to the attached figures in which: • Figure 1 is a perspective view from below of a power absorption module according to a mode of achievement; FIG. 2 is a perspective view from above of the module according to FIG. 1; FIG. 3 is a perspective view from below of the module of FIG. 1 in its mounting environment; FIG. 4 is a cross-sectional representation along AA of FIG.

En relation avec les figures, on décrit un module d'absorption d'énergie destiné à être monté entre le capot sur moteur d'un véhicule automobile et le pare-brise dudit véhicule. Pour ce faire, la géométrie du module, et notamment sa longueur, est agencée pour couvrir sensiblement toute la zone de jonction entre le capot et le pare-brise.  In connection with the figures, there is described an energy absorbing module intended to be mounted between the engine hood of a motor vehicle and the windshield of said vehicle. To do this, the geometry of the module, and in particular its length, is arranged to cover substantially the entire junction zone between the hood and the windshield.

Le module comprend un corps 1 et une poutre 2 d'absorption d'énergie qui est disposée en appui sur ledit corps. Le corps 1 peut être réalisé par thermoformage de plaques de feutre phénolique ou en laine de verre éventuellement associées à des plaques à base de PVC (polychlorure de 3 vinyle) ou d'EPDM (éthylène propylène diène monomère) et la poutre 2 est typiquement réalisée par injection d'un matériau polymérique, éventuellement chargé de sorte à optimiser ses propriétés mécaniques. La géométrie de la poutre 2 est en outre agencée pour optimiser ses propriétés mécaniques, notamment en présentant une section en U comme représenté sur les figures.  The module comprises a body 1 and a beam 2 of energy absorption which is disposed in abutment on said body. The body 1 may be made by thermoforming phenolic or glass wool felt plates possibly associated with PVC (polyvinyl chloride) or EPDM (ethylene propylene diene monomer) based plates, and the beam 2 is typically produced. by injection of a polymeric material, optionally loaded so as to optimize its mechanical properties. The geometry of the beam 2 is further arranged to optimize its mechanical properties, in particular by having a U-shaped section as shown in the figures.

En relation avec la figure 3, la poutre 2 comprend deux zones extrêmes qui sont disposées en appui sur deux parties 3 de la caisse du véhicule qui sont agencées à cette fin. Ainsi, la poutre 2 peut absorber de l'énergie d'un choc, notamment avec un piéton, par flexion.  In relation to FIG. 3, the beam 2 comprises two end zones which are arranged in abutment on two parts 3 of the vehicle body which are arranged for this purpose. Thus, the beam 2 can absorb the energy of a shock, in particular with a pedestrian, by bending.

Selon cet agencement, la disposition relative de la poutre 2 et du corps 1 est prévue pour que le corps 1 présente une fonction d'absorption acoustique. En particulier, dans le mode de réalisation représenté, le corps 1 et la poutre 2 sont en appui longitudinalement l'un sur l'autre. Selon un autre mode de réalisation, la poutre 2 peut soutenir le corps 1 au moyen d'appuis ponctuels issus de matière.  According to this arrangement, the relative arrangement of the beam 2 and the body 1 is provided so that the body 1 has an acoustic absorption function. In particular, in the embodiment shown, the body 1 and the beam 2 are supported longitudinally on one another. According to another embodiment, the beam 2 can support the body 1 by means of point supports derived from material.

Le module comprend en outre un pied 4 qui s'étend depuis sensiblement la zone médiane de la poutre 2. Le pied 4 est agencé pour venir en appui sur un support de sorte à limiter la flexion de la poutre 2 en cas de choc. A cet effet, le pied 4 s'étend en dessous de la poutre 2, c'est-à-dire à l'opposé de l'impact du choc à sécuriser.  The module further comprises a foot 4 which extends substantially from the median zone of the beam 2. The foot 4 is arranged to bear on a support so as to limit the bending of the beam 2 in case of impact. For this purpose, the foot 4 extends below the beam 2, that is to say the opposite of the impact of the shock to secure.

Selon la figure 3, le support est formé par une pièce 5 sur laquelle le corps 1 est en appui. En variante, le pied 4 peut être prévu pour venir en appui sur une zone de la caisse du véhicule. Selon une autre variante, la pièce 5 peut se déformer légèrement avant que la caisse bloque le pied 4. Il peut également être prévu que la forme du pied soit agencée pour se déformer lorsque ledit pied 4 vient en appui sur une zone de la caisse. 4 Ainsi, le pied 4 assure un appui de la zone médiane de la poutre 2, ce qui permet de limiter sa flexion et donc de pouvoir dimensionner la poutre 2 de façon optimale relativement à sa fonction d'absorption d'énergie.  According to Figure 3, the support is formed by a part 5 on which the body 1 is supported. Alternatively, the foot 4 may be provided to bear on an area of the vehicle body. According to another variant, the part 5 can be deformed slightly before the body blocks the foot 4. It can also be expected that the shape of the foot is arranged to deform when said foot 4 bears on an area of the body. Thus, the foot 4 provides support for the median zone of the beam 2, which makes it possible to limit its flexion and thus to be able to dimension the beam 2 optimally with respect to its energy absorption function.

Selon le mode de réalisation représenté, le pied 4 est venu de matière avec la poutre 2 de sorte à pouvoir être obtenu conjointement par moulage. En variante, on pourrait envisager que le pied 4 soit séparé de la poutre 2, notamment dans le cas où il serait souhaitable que ce dernier soit réalisé dans un matériau différent de celui formant la poutre 2.  According to the embodiment shown, the foot 4 is integral with the beam 2 so that it can be obtained jointly by molding. Alternatively, it could be envisaged that the foot 4 is separated from the beam 2, in particular in the case where it would be desirable for the latter to be made of a material different from that forming the beam 2.

En outre, le pied 4 représenté est incliné par rapport à la verticale définie par la poutre 2 et la partie extrême dudit pied qui est opposé à la poutre 2 présente une zone 6 s'étendant sensiblement transversalement. Selon cette réalisation, le pied 4 confère un appui arrière à la poutre 2, ledit appui étant sécurisé en prévoyant que la zone transversale 6 soit immobilisée dans une zone de la pièce 5 prévue à cet effet. En outre, le pied 4 peut également absorber une partie de l'énergie de la flexion de la poutre 2 par flexion propre et/ou par compression.  In addition, the foot 4 shown is inclined relative to the vertical defined by the beam 2 and the end portion of said foot which is opposite the beam 2 has a zone 6 extending substantially transversely. According to this embodiment, the foot 4 gives a rear support to the beam 2, said support being secured by providing that the transverse zone 6 is immobilized in a zone of the part 5 provided for this purpose. In addition, the foot 4 can also absorb part of the energy of the bending of the beam 2 by bending and / or by compression.

Dans le mode de réalisation décrit, la poutre 2 comprend en outre une nervure longitudinale 7 qui est agencée pour permettre la fixation d'un joint sur ladite poutre, par exemple afin d'étanchéifier le contact entre le module et le capot sur moteur. La nervure 7 absorbe également une partie de l'énergie du choc.  In the embodiment described, the beam 2 further comprises a longitudinal rib 7 which is arranged to allow the attachment of a seal on said beam, for example to seal the contact between the module and the engine cover. The rib 7 also absorbs some of the energy of the shock.

Comme représenté, on peut également prévoir que le corps 1 comprenne une gorge 8 formant moyen d'évacuation d'eau au niveau de la zone de jonction entre le capot et le pare-brise. En outre, le corps peut également comprendre des moyens permettant la collecte d'air pour le système de ventilation / climatisation du véhicule.30  As shown, it can also be provided that the body 1 comprises a groove 8 forming water discharge means at the junction zone between the hood and the windshield. In addition, the body may also include means for collecting air for the vehicle ventilation / air conditioning system.

Claims (6)

REVENDICATIONS 1. Module d'absorption d'énergie destiné à être monté entre le capot sur moteur d'un véhicule automobile et le pare-brise dudit véhicule, ledit module comprenant un corps (1) et une poutre (2) d'absorption d'énergie disposée en appui sur ledit corps, ladite poutre comprenant deux zones extrêmes destinées à venir en appui sur la caisse du véhicule de sorte que la poutre (2) puisse absorber de l'énergie d'un choc par flexion, ledit module étant caractérisé en ce qu'il comprend en outre au moins un pied (4) s'étendant depuis sensiblement la zone médiane de ladite poutre, ledit pied étant agencé pour venir en appui sur un support (5) de sorte à limiter la flexion de ladite poutre en cas de choc.  An energy absorbing module for mounting between the engine hood of a motor vehicle and the windshield of said vehicle, said module comprising a body (1) and a beam (2) for absorbing energy. energy disposed in abutment on said body, said beam comprising two end zones intended to rest on the body of the vehicle so that the beam (2) can absorb energy from a shock by bending, said module being characterized in it further comprises at least one foot (4) extending substantially from the median zone of said beam, said foot being arranged to bear on a support (5) so as to limit the flexion of said beam by case of shock. 2. Module d'absorption d'énergie selon la revendication 1, caractérisé en ce que le pied (4) est venu de matière avec la poutre (2).  2. Energy absorbing module according to claim 1, characterized in that the foot (4) is integral with the beam (2). 3. Module d'absorption d'énergie selon la revendication 1 ou 2, caractérisé en ce que le pied (4) est incliné par rapport à la direction verticale définie par la poutre (2).  3. energy absorbing module according to claim 1 or 2, characterized in that the foot (4) is inclined relative to the vertical direction defined by the beam (2). 4. Module d'absorption d'énergie selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la partie extrême du pied (4) qui est opposée à la poutre présente une zone (6) s'étendant sensiblement transversalement. 25  4. Energy absorbing module according to any one of claims 1 to 3, characterized in that the end portion of the foot (4) which is opposite the beam has a zone (6) extending substantially transversely. 25 5. Module d'absorption d'énergie selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la poutre (2) comprend en outre une nervure longitudinale (7) qui est agencée pour permettre la fixation d'un joint sur ladite poutre. 30  5. energy absorbing module according to any one of claims 1 to 4, characterized in that the beam (2) further comprises a longitudinal rib (7) which is arranged to allow the attachment of a seal on said beam. 30 6. Module d'absorption d'énergie selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le corps (1) comprend une gorge (8) formant moyen d'évacuation d'eau.20  6. Energy absorbing module according to any one of claims 1 to 5, characterized in that the body (1) comprises a groove (8) forming means for discharging water.
FR0605023A 2006-06-06 2006-06-06 ENERGY ABSORPTION MODULE COMPRISING A FLEXION BEAM AND A SUPPORT FOOT Expired - Fee Related FR2901757B1 (en)

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FR0605023A FR2901757B1 (en) 2006-06-06 2006-06-06 ENERGY ABSORPTION MODULE COMPRISING A FLEXION BEAM AND A SUPPORT FOOT

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FR0605023A FR2901757B1 (en) 2006-06-06 2006-06-06 ENERGY ABSORPTION MODULE COMPRISING A FLEXION BEAM AND A SUPPORT FOOT

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FR2901757A1 true FR2901757A1 (en) 2007-12-07
FR2901757B1 FR2901757B1 (en) 2008-09-05

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102529873A (en) * 2010-12-27 2012-07-04 上海汽车集团股份有限公司 Automobile front windshield cross sill and vehicle applying same
FR2987335A1 (en) * 2012-02-29 2013-08-30 Renault Sa MOTOR VEHICLE WATER BOX CAPABLE OF ABSORBING A PART OF THE ENERGY OF A PITCH SHOCK AND CORRESPONDING FRONT STRUCTURE
FR3021008A1 (en) * 2014-05-19 2015-11-20 Cera DEVICE FOR COLLECTING AND SEPARATING WATER AND VENTILATION AIR FROM A MOTOR VEHICLE HABITACLE
FR3031337A1 (en) * 2015-01-07 2016-07-08 Peugeot Citroen Automobiles Sa STRUCTURE ELEMENT COMPRISING A FIRST REINFORCING ELEMENT ON WHICH IS SOLIDARIZED A SECOND REINFORCING ELEMENT AND VEHICLE COMPRISING SUCH A STRUCTURE ELEMENT
FR3132676A1 (en) * 2022-02-15 2023-08-18 Psa Automobiles Sa motor vehicle water flow module

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FR2819475A1 (en) * 2001-01-15 2002-07-19 Neyr Plastiques Holding Device for recovery of rainwater from automobile front compartment comprises long plastic tray with longitudinal reinforcing element which is fixed to vehicle bodywork
FR2847205A1 (en) * 2002-11-18 2004-05-21 Neyr Plastiques Holding Vehicle water tank, has rupture zones that are liable to break when it is under load exerted from outside the vehicle due to vertical component and reaching preset value, control unit to control tank movement after zones collapse
EP1564114A2 (en) * 2004-02-13 2005-08-17 Nissan Motor Co., Ltd. Vehicle cowl structure
GB2417012A (en) * 2004-07-27 2006-02-15 Nihon Plast Company Ltd A cowl cover for a vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2819475A1 (en) * 2001-01-15 2002-07-19 Neyr Plastiques Holding Device for recovery of rainwater from automobile front compartment comprises long plastic tray with longitudinal reinforcing element which is fixed to vehicle bodywork
FR2847205A1 (en) * 2002-11-18 2004-05-21 Neyr Plastiques Holding Vehicle water tank, has rupture zones that are liable to break when it is under load exerted from outside the vehicle due to vertical component and reaching preset value, control unit to control tank movement after zones collapse
EP1564114A2 (en) * 2004-02-13 2005-08-17 Nissan Motor Co., Ltd. Vehicle cowl structure
GB2417012A (en) * 2004-07-27 2006-02-15 Nihon Plast Company Ltd A cowl cover for a vehicle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102529873A (en) * 2010-12-27 2012-07-04 上海汽车集团股份有限公司 Automobile front windshield cross sill and vehicle applying same
CN102529873B (en) * 2010-12-27 2016-01-13 上海汽车集团股份有限公司 Automobile front windshield lower beam and apply the automobile of this crossbeam
FR2987335A1 (en) * 2012-02-29 2013-08-30 Renault Sa MOTOR VEHICLE WATER BOX CAPABLE OF ABSORBING A PART OF THE ENERGY OF A PITCH SHOCK AND CORRESPONDING FRONT STRUCTURE
WO2013128106A1 (en) * 2012-02-29 2013-09-06 Renault S.A.S Motor vehicle water reservoir capable of absorbing part of the energy of a pedestrian impact, and corresponding front structure
FR3021008A1 (en) * 2014-05-19 2015-11-20 Cera DEVICE FOR COLLECTING AND SEPARATING WATER AND VENTILATION AIR FROM A MOTOR VEHICLE HABITACLE
FR3031337A1 (en) * 2015-01-07 2016-07-08 Peugeot Citroen Automobiles Sa STRUCTURE ELEMENT COMPRISING A FIRST REINFORCING ELEMENT ON WHICH IS SOLIDARIZED A SECOND REINFORCING ELEMENT AND VEHICLE COMPRISING SUCH A STRUCTURE ELEMENT
FR3132676A1 (en) * 2022-02-15 2023-08-18 Psa Automobiles Sa motor vehicle water flow module

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