FR3130700A1 - Airflow guidance module for an electric or hybrid motor vehicle - Google Patents

Abstract

Module for guiding an air flow for an electric or hybrid motor vehicle The invention relates to a module (5) for guiding an air flow (F) for an electric or hybrid motor vehicle (1), said module (5) being intended to be crossed by an air flow (F) and comprising a duct (12) between an inlet opening (14) and an outlet opening (16), a low temperature radiator (6) and a heat exchanger (7) arranged inside said duct (12), and a shutter device (400) movable between a closed position closing the duct (12) and an open position to allow the flow of air to pass (F) through the duct (12), the module (5) being characterized in that inside the duct (12) the heat exchanger (7) comprises at least one open portion (72) screw -à-vis direct from the inlet opening (14) and in that the closure device (400) is configured to allow an intermediate position in which it obstructs only the open portions (72) of said exchanger ( 7). Abstract Figure: Figure 1b

Description

Airflow guidance module for an electric or hybrid motor vehicle

The invention relates to a module for guiding an air flow for an electric or hybrid motor vehicle. The invention is in particular intended to equip a front face of said motor vehicle. An air flow is intended to enter via this front face inside a duct of the guide module. Inside said duct are arranged one or more heat exchangers as well as a device for closing the air flow. The air flow is intended to circulate along the duct of the guide module and to cross the inlet faces of said heat exchanger(s). The circulation of the air flow inside the duct of the guide module is strongly influenced by an air flow shutter device arranged in said duct. This closing device is movable between a closed position closing said duct of the guide module and an open position to allow the flow of air to pass through this same duct.

It is common to use such an airflow blocking device to reduce the drag coefficient and also to improve the cooling and air conditioning performance within the motor vehicle.

In the open position of the shutter device, the air flow can therefore circulate through the heat exchanger(s) arranged inside the duct of the guide module and thus participate in particular in the cooling of both the electronic part power than one or more electric motors as well as the heat engine in the context of a hybrid motor vehicle. In the closed position of the shutter device, the latter opposes the circulation of the air flow within the guidance module, which makes it possible to reduce the drag coefficient and therefore makes it possible to reduce fuel consumption as well than pollutant emissions. This therefore makes it possible to reduce pollution and energy consumption when the motor does not need to be cooled by the outside air.

The air flow shutter device therefore adopts extreme positions, in particular an open position or a closed position. However, it can be noted in particular that in the case where the hybrid motor vehicle operates solely on electric power, these extreme positions of the closure device do not make it possible to precisely regulate the passage of the flow of air through the or the heat exchangers arranged inside the duct of the guide module. The cooling power on the electric motor(s) of the motor vehicle is therefore not optimal.

The object of the present invention is therefore to remedy, at least partially, the drawbacks of the prior art and to propose an improved air flow guide module making it possible to precisely regulate the flow of air circulating inside the duct of the guide module to increase the cooling performance of the heat exchangers arranged inside this duct during fully electric operation of the motor vehicle.

The present invention therefore relates to a module for guiding an air flow for an electric or hybrid motor vehicle, said guide module being intended to be traversed by an air flow and comprising:
- a duct between an inlet opening and an airflow outlet opening,
- a low temperature radiator,
- at least a first heat exchanger,
the low-temperature radiator and the at least one first heat exchanger both being disposed inside said duct and intended to be traversed by the air flow, the air flow guiding module further comprising a device movable shutter between a closed position closing the duct of the guide module and an open position to allow the flow of air to pass through the duct of the guide module,
the air flow guiding module being characterized in that inside the duct, the first heat exchanger comprises at least one open portion facing directly from the inlet opening of the duct and in that the shutter device is configured to allow an intermediate position in which said shutter device only obstructs the unobstructed portion(s) of the first heat exchanger.

The intermediate position of the closing device makes it possible to obstruct the flow of air at the level of the unobstructed portion of the first heat exchanger. Thanks to this intermediate position of the shutter device, the air flow is mainly directed towards the low temperature radiator, which makes it possible to increase the cooling performance of the heat exchangers arranged inside the duct of the guide module. during fully electric operation of the motor vehicle

The invention may further comprise one or more of the following aspects taken alone or in combination:

– the shutter device comprises at least one flexible curtain and secured to a winding shaft arranged on one side of the duct of the guide module;

– the closing device is configured to move said at least one curtain in an opening and closing direction, between a closed position closing the duct and an open position configured to let the air flow pass through the duct of the module guidance;

- the shutter device is also capable of moving said at least one curtain into an intermediate position in which the at least one curtain only obstructs the unobstructed portion(s) of the first heat exchanger;

– the low temperature radiator and the at least one first heat exchanger are both arranged upstream of the closure device in the longitudinal direction of the conduit of the guide module;

- The low temperature radiator is arranged upstream of the first heat exchanger in the longitudinal direction of the conduit of the guide module;

- The low temperature radiator at least partly covers the first heat exchanger;

– the dimension of the low-temperature radiator measured along the direction of opening and closing of at least one curtain of the airflow blocking device is less than the dimension of the heat exchanger measured along this same direction;

– the low-temperature radiator is arranged centered with respect to the first heat exchanger in the direction of opening and closing of said at least one curtain, so that the first heat exchanger comprises a clear portion on either side of the edges defining an inlet face of the low temperature radiator;

– the airflow blocking device comprises two separate flexible curtains arranged on opposite sides of the guide module duct;

– in the intermediate position, the end edges of the two curtains are at the height of the edges delimiting the entry face of the low temperature radiator;

- the low temperature radiator is arranged on one side of the first heat exchanger;

– the low temperature radiator and the first heat exchanger have at least one of their edges aligned on a first side of the duct of the air flow guiding module;

– the airflow blocking device comprises a single flexible curtain secured to a winding shaft arranged on a second side of the duct of the airflow guiding module, said second side being located opposite the first side of said duct;

– in its intermediate position, the end edge of the curtain is at the height of the edge of the low temperature radiator closest to the second side of the guide module duct;

– the low temperature radiator and the first heat exchanger are arranged in the same plane extending perpendicularly to the longitudinal direction of the guide module duct;

– the airflow blocking device comprises a single flexible curtain attached to a winding shaft located on the same side of the duct as the low temperature radiator;

– in its intermediate position, the extreme edge of said curtain is located at the height of a space between the low temperature radiator and the first heat exchanger.

It is understood that all the characteristics and configurations previously given are in no way limiting. Other characteristics, details and advantages of the invention will emerge more clearly on reading the detailed description given below, and several examples of embodiment given by way of indication and not limitation with reference to the appended schematic drawings, in which:

There schematically illustrates, in side view, the front face of a motor vehicle comprising a module for guiding an air flow according to a first embodiment in which the device for shutting off the air flow is in closed position;

There is a figure similar to in which the device for shutting off the air flow is in an intermediate position;

There is an exploded view of the device for shutting off an air flow of the first embodiment;

There is a front view of the closure device of the in which the curtains are in the open position;

There is another front view of the closure device of the in which the curtains are in a partially open position;

There is a third front view of the closure device of the in which the curtains are in the closed position;

There is a detail view of a portion of the kinematic assembly which equips the device for shutting off an air flow from the ;

There schematically illustrates, in side view, the front face of a motor vehicle comprising a module for guiding an air flow according to a second embodiment in which the device for shutting off the air flow is in closed position;

There is a figure similar to in which the device for shutting off the air flow is in an intermediate position;

There is a schematic front view of a device for shutting off an air flow according to the second embodiment in the open position;

There is a view similar to the wherein the air flow shutter device is in the closed position;

There illustrates in schematic view a section of the device for closing an air flow of the according to plan AA;

There schematically illustrates, in side view, the front face of a motor vehicle comprising a module for guiding an air flow according to a third embodiment in which the device for shutting off the air flow is in closed position; And

There is a figure similar to in which the device for shutting off the air flow is in an intermediate position.

Identical elements in the various figures bear the same references. On all the figures is represented an XYZ trihedron in order to define the orientation of the various elements from each other. A first direction, denoted X, corresponds to a longitudinal direction of the vehicle. It also corresponds to a direction opposite to the direction of travel of the vehicle. A second direction, denoted Y, is a lateral or transverse direction. Finally, a third direction, denoted Z, is vertical. The directions, X, Y, Z are orthogonal two by two.

The following achievements are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference is to the same embodiment, or that the features apply only to a single embodiment. Simple features of different embodiments can also be combined or interchanged to provide other embodiments.

In the present description, it is possible to index certain elements or parameters, such as for example first element or second element as well as first parameter and second parameter or even first criterion and second criterion, etc. In this case, it is a simple indexing to differentiate and name elements or parameters or criteria that are close but not identical. This indexing does not imply a priority of one element, parameter or criterion over another and such denominations can easily be interchanged without departing from the scope of the present description. This indexing does not imply an order in time either, for example to assess such and such criteria.

There illustrates, in a side sectional view, a guide module 5 arranged at the front of an electric or hybrid motor vehicle 1. The guide module 5 is intended to be traversed by an air flow F, which is why the guide module 5 comprises a duct 12 extending in a longitudinal direction X between an inlet opening 14 and an opening of outlet 16. The guide module 5 is for example arranged downstream of a grille 3 of the motor vehicle 1 in the longitudinal direction X. Thus the air flow F is intended to pass through the grille 3 to penetrate inside the guide module 5 via the inlet opening 14 and to flow along the duct 12 before being evacuated from the latter via the outlet opening 16.

The guide module 5 also comprises a low temperature radiator 6 and at least one first heat exchanger 7. The low temperature radiator 6 and the at least one first heat exchanger 7 are also intended to be crossed by the air flow. F, which is why they are both arranged inside the duct 12 of the guide module 5.

The low temperature radiator 6 serves for example to cool a coolant of a heat exchange loop, in particular for the thermal management of the electric motor or motors of the motor vehicle 1. The first heat exchanger 7 is for example connected to a reversible air conditioning circuit, in particular for the thermal management of the passenger compartment of the motor vehicle 1.

The guide module 5 of the air flow F can also comprise a second heat exchanger 9. This second heat exchanger 9 is for example arranged downstream of the low temperature radiator 6 and of the first heat exchanger 7 in the longitudinal direction X of the guide module 5. In the case where the motor vehicle is a hybrid motor vehicle, this second heat exchanger 9 can be a high temperature radiator for thermal management of the combustion engine of the motor vehicle.

As shown in Figures 1a, 1b, 5a, 5b, 8a and 8b, the low temperature radiator 6 and the heat exchanger(s) 7, 9 extend in planes perpendicular to the longitudinal direction X of the conduit 12 of the module guide 5. In operation, the air flow F therefore flows substantially parallel to this longitudinal direction X. The air flow F is in particular illustrated by an arrow located on the left in FIGS. 1a, 1b, 5a, 5b , 8a and 8b.

The low temperature radiator 6 and the first heat exchanger 7 each have respectively an inlet face 60 for the low temperature radiator 6 and an inlet face 71 for the first heat exchanger 7 through which the air flow enters through. Said exchange faces 60 and 71 extend perpendicular to the longitudinal direction X of the guide module 5. They are both oriented towards the grille 3 of the motor vehicle 10, as illustrated in FIGS. 1a, 1b, 5a, 5b , 8a and 8b.

In all of the embodiments of the guide module 5 of the air flow F illustrated in FIGS. 1a, 1b, 5a, 5b and 8a, 8b, the inlet face 60 of the low temperature radiator 6 is of smaller dimension. to that of the inlet face 71 of the first heat exchanger 7, because the cooling needs at the level of the low temperature radiator 6 are generally lower.

The first heat exchanger 7 also comprises at least one cleared portion 72 directly opposite the inlet opening 14 of the conduit 12. The cleared portion 72 is "cleared" in the sense that it is not covered by the low temperature radiator 6, i.e. the air flow F has direct access to this unobstructed portion 72 without first passing through the low temperature radiator 6.

The guide module 5 of the air flow F further comprises a closure device 400 movable between a closed position (illustrated for example in Figures 1a, 3c, 5a, 6b and 8a) closing the duct 12 of the guide module 5 and an open position (illustrated for example in FIGS. 3a and 6a) to allow the air flow F to pass through the duct 12 of the guide module 5. The shutter device 400 is also configured to allow an intermediate position in which it obstructs only the free portion or portions 72 of the first heat exchanger 7. This intermediate position of the closure device 400 is more particularly illustrated in FIGS. 1b, 5b and 8b.

In all of the embodiments described below, the low temperature radiator 6 and the first heat exchanger 7 are both arranged upstream of the device 400 for closing off the air flow F in the longitudinal direction X of the duct 12 of the guide module 5. In this configuration, the air flow F is intended to first pass through said low temperature radiator 6 and said first heat exchanger 7 before reaching the shutter device 400. Place the low temperature radiator 6 and the first heat exchanger 7 on the same side of the closure device 400 makes it possible to arrange them according to more favorable configurations in terms of cooling efficiency. These configurations will be described later in the description during the presentation of the various embodiments.

In the case where the guide module 5 also comprises a second heat exchanger 9, the latter is for example arranged downstream of the device 400 for closing off the flow of air F along the axis X. Thus, in the example illustrated in Figures 1a, 1b, 5a, 5b, 8a and 8b the heat exchangers 7 and 9 are arranged on either side of the closure device 400.

Various arrangements can be imagined for the low temperature radiator 6, the first heat exchanger 7 and the device 400 for closing the air flow within the guide module 5 of the air flow F. Thus, according to a first mode embodiment of the guide module 5 of the air flow F illustrated in FIGS. 1a and 1b, the low temperature radiator 6 is arranged upstream of the first heat exchanger 7 in the longitudinal direction X of the duct 12 of the guide module 5 and it at least partly covers the first heat exchanger 7. In other words, in this specific configuration, a large part of the air flow F is intended to pass through the low temperature radiator 6 before passing through the first heat exchanger 7. A another part of the air flow F passes directly through the open portion 72 of the first heat exchanger 7 without first passing through the low temperature radiator 6 when the shutter device 400 is in its open position.

In the various embodiments described below, the shutter device 400 comprises at least one curtain 404, 405 which is integral with a winding shaft 401, 402 arranged on one side of the conduit 12 of the guide module 5.

The at least one curtain 404, 405 can in particular be obtained by cutting: it is for example made from a flexible material, such as a fabric based on glass fibers covered with a waterproof and water-repellent coating.

The shutter device 400 is capable of moving said at least one curtain 404, 405 in an opening and closing direction, between a closed position closing off the duct 12 and an open position configured to allow the air flow F to pass through. through conduit 12 of guide module 5.

As represented in FIGS. 1a, 1b, 5a, 5b, 8a and 8b, the direction of opening and closing of the at least one curtain 404, 405 of the device 400 for closing the air flow F corresponds substantially to the vertical direction Z. The closed position of at least one curtain 404, 405 is illustrated in particular in Figures 1a, 3c, 5a, 6b and 8a while the open position of at least one curtain 404, 405 is illustrated for example in Figures 3a and 6a.

The shutter device 400 is also configured to move said at least one curtain 404, 405 into an intermediate position in which the at least one curtain 404, 405 only obstructs the unobstructed portion(s) 72 of the first heat exchanger 7. Otherwise said, when the at least one curtain 404, 405 is in its intermediate position, the passage opening for the air flow F is modified so that the air flow F can pass through the entire inlet face 60 of the low temperature radiator 6, but not through the open portion 72 of the first heat exchanger 7. This intermediate position is particularly illustrated in Figures 1b, 5b and 8b.

In a first embodiment of the guide module 5 of the air flow F illustrated in FIGS. 1a and 1b, the shutter device 400 has several characteristics which will be detailed in the following paragraphs.

Thus, according to a first embodiment of the shutter device 400 illustrated in more detail in Figures 2, 3a, 3b and 3c, the shutter device 400 comprises a support frame 361 of generally rectangular shape. Referring to the XYZ trihedron, the support frame 361 extends in the plane formed by the Y and Z axes.

Referring to the embodiment illustrated in the , the support frame 361 comprises for example a first shell 362 and a second shell 363 which are configured to be nested with each other so as to form a first crosspiece and a second crosspiece which are parallel to each other, as well as two side uprights which extend between the ends of the first crosspiece and of the second crosspiece so as to define a passage opening for the support frame 361 intended to be borrowed by the flow of air F. In FIGS. 2, 3a, 3b and 3c, the first crosspiece and the second crosspiece of the support frame 361 are oriented in the Y direction and the two side uprights are oriented substantially vertically in the Z direction.

The two shells 362 and 363 of the support frame 361 of the closure device 400 are in particular rigid, they are for example made of plastic material. The two shells 362 and 363 are for example obtained by injection molding. In order to improve the overall rigidity of said support frame 361 formed by these two shells 362 and 363, these can be molded in one piece.

Clip tabs 364 (visible in particular on the ) or any other means of connection allowing the shells 362 and 363 to be assembled together can be fitted to the first and second crosspieces and/or the side uprights of the support frame 361. These clipping tabs 364 make it possible to disassemble the support frame 361 to clean , maintain or possibly replace the components of the shutter device 400.

In the embodiment illustrated in Figures 1a, 1b, 2, 3a, 3b and 3c, the shutter device 400 more particularly comprises two winding shafts 401, 402 arranged at the level of the first and second crosspieces of the support frame. 361 so as to be sandwiched by the two shells 362 and 363 which form said support frame 361. Each winding shaft 401, 402 may comprise two longitudinal parts 430 and 431 assembled around which the at least one curtain 404, 405 is wound , this is particularly illustrated in the .

The winding shafts 401, 402 for example each comprise at their longitudinal ends end pieces 409 cooperating with bearings 410 so as to be able to rotate around a winding axis A1, A2 specific to each winding shaft 401, 402. These axes of 'winding A1, A2 (illustrated in Figures 3a, 3b, 3c) are preferably parallel to the first and second crosspieces of the support frame 361.

The cooperation between the ends 409 of the winding shafts 401, 402 with bearings 410 therefore makes it possible to make the curtains 404, 405 mobile. Since the curtains 404, 405 are flexible, they can be rolled up and unrolled around said winding shafts 401, 402. Winding the at least one curtain 404, 405 around a winding shaft 401, 402 makes it possible to store said curtain in a simple and compact when in its open position.

The at least one curtain 404, 405 is for example generally rectangular in shape and therefore has four edges 412, 413 and 414. Among these four edges, one can in particular distinguish a proximal edge 412 which serves as a connection between the winding shaft 401, 402 and the curtain 404, 405; two side edges 413 and a second end edge 414, as illustrated in the .

The extremal border 414 is located opposite the proximal border 412, these proximal 412 and extremal 414 borders are parallel to each other and perpendicular to the direction of opening and closing of the at least one curtain 404. In addition, the border proximal 412 and the extremal edge 414 extend parallel to the winding shafts 401, 402 while the side edges 413 are parallel to the opening and closing direction of the at least one curtain 404, 405.

The proximal edge 412 of at least one curtain 404, 405 is integral with the winding shaft 401 or 402 with which said curtain 404 or 405 is associated. Thus, when the at least one curtain 404, 405 is wound around the winding shaft 401 or 402 to which its proximal edge 412 is attached, this corresponds to its open position ( ).

The extremal edge 414 of the at least one curtain 404, 405 can be integral with a sealing member 416 which can take the form of a rod 417 assembled with a seal 418, as illustrated in the . The rod 417 can in particular stiffen said end edge 414. The ends of the rod 417 can also be arranged in rails arranged on the side uprights of the support frame 361. The rod 417 thus makes it possible to carry the seal 418 but also to maintain the at least one curtain 404, 405 against the support frame 361 and to guide the at least one curtain 404, 405 in its movement between its open position and its closed position.

In order to move the at least one curtain 404, 405 in the direction of opening and closing, the shutter device 400 comprises an electric actuator 406 cooperating with one of the winding shafts 401 or 402. In the embodiment of the device 400 illustrated in FIGS. 2, 3a, 3b and 3c, the electric actuator 406 cooperates more particularly with the first winding shaft 401. On the , the actuator 406 is housed in a box 365 arranged on a side upright of the frame 361.

The actuator 406 is configured to rotate the first winding shaft 401 via two toothed wheels 407 and 408 for example. These wheels 407 and 408 mesh together, this is particularly illustrated in the . In this same figure, the toothed wheel 407 is integral with the actuator 406, its electric motor in particular, and the toothed wheel 408 is integral with the shaft 401. Thus the first winding shaft 401 is drivable by the electric actuator 406 and the second winding shaft 402 is passive.

The device 400 also includes a kinematic assembly 403 configured to move the at least one curtain 404, 405 according to its opening and closing direction. The kinematic assembly 403 is more particularly arranged to transmit a movement of the first winding shaft 401 associated with the electric actuator 406 to the second winding shaft 402. The kinematic assembly 403 thus cooperates with the two winding shafts 401, 402 to associate their rotation respectively. The second winding shaft 402 can be described as "passive" in the sense that it is not directly connected to the actuator 406 as is the case for the first winding shaft 401, but driven by the kinematic assembly 403 linking these two winding shafts 401 and 402.

The at least one curtain 404, 405 is extended by at least one belt element 411 (visible in FIGS. 2 to 4 for example) which is part of the kinematic assembly 403. The at least one belt element 411 has in particular a slender in shape, it extends parallel to the side edges 413 of at least one curtain 404, 405 with which it is associated. In the embodiment of the device 400 illustrated in Figures 2, 3a, 3b and 3c, two belt elements 411 parallel to each other extend the at least one curtain 404, 405 on two side edges 413 opposite to each other. . These two belt elements 411 are arranged symmetrically with respect to an axis of symmetry SY which extends parallel to the direction of opening and closing. This axis of symmetry SY then passes through the middle of at least one curtain 404, 405, as illustrated in FIGS. 3a and 3b. The belt elements 411 thus form strips of material which extend the at least one curtain 404, 405 like straps.

In this same embodiment, one of the belt elements 411 extends at least partially above a side edge 413 of the at least one curtain 404, 405 and the other belt element 411 extends at least partially below the other lateral edge 413 of the at least one curtain 404, 405. In other words, when the at least one curtain 404, 405 and the belt elements 411 associated with it are laid flat, these belt elements 411 deviate from the side edges 413 of the at least one curtain 404, 405. Thus the belt elements 411 do not obstruct the passage opening through the support frame 361 when the at least one curtain 404, 405 is in its open position. The belt elements 411 are located away from the location occupied by the at least one curtain 404, 405 in the closed position.

The belt element(s) 411 can be made in one piece with the at least one curtain 404 or 405 with which they are associated. In other words, the belt element 411 and the at least one curtain 404 or 405 are for example cut from the same fabric during manufacture.

In a variant, the belt element or elements 411 are elements assembled with the at least one curtain 404 or 405, that is to say that the belt element 411 is not formed in the same part as the curtain 404 or 405. The belt element 411 is for example made of a different material from the material of at least one curtain 404, 405. The belt element(s) can then be fixed to said curtain 404, 405 by a fixing, by example a seam, glue, welding or other.

In this first embodiment of the shutter device 400, the latter therefore comprises two separate curtains 404, 405 which are arranged on opposite sides of the conduit 12 of the guide module. These opposite sides of the duct 12 designate more particularly the sides extending in a plane perpendicular to the direction of opening and closing of the curtains 404, 405 (which is substantially parallel to the axis Z). The opposite sides therefore designate the upper side of the duct 12, that is to say the side closest to the roof of the motor vehicle 1, and the lower side of the duct 12, that is to say the side closest to the base of the motor vehicle 1. These opposite sides of the duct 12 face each other.

The opposite sides of the duct 12 can also designate the lateral sides of the duct 12 which are perpendicular to the direction Y. In this particular case, the winding shafts 401 and 402 are arranged substantially parallel to the direction Z and the direction of opening. and closing of the curtains 404, 405 then corresponds to the Y direction. In other words, in this particular configuration, the curtains 404 and 405 are moved transversely and not from top to bottom as is the case for the arrangement described previously. The respective positions of the low temperature radiator 6 and of the heat exchanger 7 are to be adapted for each case in order to allow the curtains 404, 405 to adopt the intermediate position in which they obstruct only the open portions 72 of the first heat exchanger. heat.

In the first embodiment of the guide module 5 which includes this particular shutter device 400, the low temperature radiator 6 is arranged centered with respect to the first heat exchanger 7 in the direction of opening and closing of said curtains 404, 405. In this same embodiment, the dimension of the low temperature radiator 6 measured along the direction of opening and closing of the curtains 404, 405 is less than the dimension of the heat exchanger 7 measured along this same direction. As a result, the first heat exchanger 7 comprises an open portion 72 on either side of the edges delimiting the inlet face 60 of the low temperature radiator 6. Thus the low temperature radiator 6 disposed centered and upstream of the first heat exchanger 7 in the longitudinal direction X covers the central part of said exchanger 7 while open portions 72 protrude on either side of the lower and upper edges of the low temperature radiator 6.

Furthermore, when the two curtains 404, 405 of the shutter device 400 are placed in the intermediate position, the end edges 414 of said curtains 404, 405 are located at the height of the edges delimiting the inlet face 60 of the low temperature radiator 6. This implies that when the two curtains 404, 405 of the shutter device 400 are placed in the intermediate position, these curtains obstruct only the open portions 72 of the first heat exchanger 7, but not the inlet face 60 of the radiator low temperature 6, nor the central part of the first heat exchanger 7 covered by the low temperature radiator 6.

According to a second embodiment of the closure device 400 illustrated in particular in FIGS. 5a and 5b, the low temperature radiator 6 can be arranged on one side of the first heat exchanger 7. In this second embodiment, the low temperature radiator 6 and the first heat exchanger 7 have for example at least one of their edges aligned on a first side of the duct 12 of the guide module 5 of the air flow F. As illustrated in FIGS. 5a and 5b, the first side of conduit 12 of guide module 5 corresponds to the side closest to the base. In other words, the lower edges of the low temperature radiator 6 and the first heat exchanger 7, that is to say the edges closest to the base, are at the same height.

Since the dimension of the low temperature radiator 6 measured along the direction of opening and closing of at least one curtain 404, 405 of the shutter device 400 is less than the dimension of the heat exchanger 7 measured along this same direction, the upper edges of the low temperature radiator 6 and of the first heat exchanger 7 are located at different heights on the vertical axis Z. In other words, the upper edge of the first heat exchanger 7 is closer to a second side of the duct 12 of the guide module 5 located opposite the first side of the duct 12 than the upper edge of the low temperature radiator 6.

In this particular configuration, the inlet face 60 of the low temperature radiator 6 is therefore opposite the lower part of the first heat exchanger 7. As a result, the cleared portion 72 of the first heat exchanger 7 is located above the low temperature radiator 6, as shown in Figures 5a and 5b.

In this second embodiment of the guide module 5, the shutter device 400 may be different from the embodiment described previously. Thus, in this second embodiment, the shutter device 400 has several different characteristics which are detailed in the following paragraphs.

The main difference of this second embodiment of the shutter device 400 compared to the first embodiment described above lies in the fact that in this second embodiment, the shutter device 400 comprises a single curtain 404. This single curtain 404 is integral with a winding shaft 401 arranged on a second side of the duct 12 of the guide module 5 of the air flow. This second side of the duct 12 designates the side closest to the roof of the motor vehicle 1. This second side of the duct 12 is located opposite the first side of the said duct 12, the first side being the side closest to the base of the motor vehicle. This is more particularly illustrated in Figures 5a and 5b.

This particular arrangement of the winding shaft 401 and of the single curtain 404 integral with said winding shaft 401 within the second embodiment of the shutter device 400 makes it possible to easily place the single curtain 404 in its intermediate position with respect to the low temperature radiator 6 and to the first heat exchanger 7 within the guide module 5. Thus, when the single curtain 404 is in its intermediate position, the end edge 414 of said curtain 404 is located at the height of the edge of the low radiator temperature 6 closest to the second side of conduit 12 of guide module 5, as illustrated more particularly in the . In this intermediate position, the curtain 404 obstructs only the free portion 72 of the first heat exchanger 7, this free portion 72 being located above the low temperature radiator 6 with respect to the vertical direction Z.

The second embodiment of the shutter device 400 differs from the first embodiment described above also by other characteristics which will be discussed in the following paragraphs.

Thus, in this second embodiment of the shutter device 400 illustrated more particularly in FIGS. 6a, 6b and 7, the latter comprises a support frame 361 configured to serve as a support for the single curtain 404 integral with the shaft. winder 401.

The support frame 361 more precisely comprises a first crosspiece and a second crosspiece opposite the first crosspiece. In the mounted state, the first cross member and the second cross member are parallel to each other and oriented substantially horizontally along the width of the vehicle 1. In FIGS. 6a and 6b, the first cross member and the second cross member are oriented along the direction Y.

The support frame 361 also comprises two lateral uprights which extend between the ends of the first crosspiece and the second crosspiece of the support frame 361 so as to define at least one passage opening intended to be borrowed by the air flow F crossing the grille 3 of the front face of the motor vehicle 1. In FIGS. 6a and 6b, the two side uprights are oriented substantially vertically in the direction Z.

The support frame 361 of the shutter device 400 is in particular rigid, it is for example made of plastic material. The first and second crosspieces as well as the side uprights are in particular obtained by injection molding. In order to improve the rigidity of said support frame 361, the latter can be molded in one piece.

The single curtain 404 is movable between a closed position (shown in the ) in which the curtain 404 obstructs the passage of the air flow F in the duct 12 of the guide module 5 and an open position (illustrated in the ) in which said curtain 404 lets the air flow F pass inside the duct 12 of the guide module 5.

The curtain 404 comprises a proximal edge 412 fixed to the first winding shaft 401. This first winding shaft 401 is in particular arranged at the level of the first crosspiece of the support frame 361. It then extends parallel to the first crosspiece located along a sides of the passage opening.

The curtain 404 also includes an end edge 414 opposite its proximal edge 412. The end edge 414 of the curtain 404 may be secured to a rod 417 which may in particular stiffen said end edge 414. The ends of the rod 417 may also be arranged in rails arranged on the side uprights of the frame 361. The rod 417 thus makes it possible to hold the curtain 404 against the support frame 361 and to guide the curtain 404 in its movement between its open position and its closed position.

In this second embodiment of the shutter device 400, the curtain 404 can in particular be in the form of a fabric of rectangular or trapezoidal shape. The dimensions of the curtain 404 generally correspond to those of the support frame 361. For example, the lengths of the proximal 412 and extreme 414 edges of the curtain 404 correspond approximately and respectively to the length of the first crosspiece and that of the second crosspiece. The spacing between the proximal edges 412 and the extreme edge 414 of the curtain 404 is in particular greater than or equal to the distance separating the first and the second crosspiece in the direction of closing and opening of the curtain 404.

The shutter device 400 also comprises a second shaft 402' extending over the support frame 361, along a side of the passage opening opposite to that carrying the first winding shaft 401. In the case of FIGS. 6a , 6b and 7, the second shaft 402' is arranged at the level of the second crosspiece of the support frame 361. The second shaft 402' also extends parallel to the second crosspiece of the support frame 361.

The first winding shaft 401 and the second shaft 402' are therefore parallel to each other. In the examples illustrated in Figures 6a, 6b and 7, the first winding shaft 401 is arranged above the second shaft 402'. In other words, the first winding shaft 401 is closer to the roof of the motor vehicle 1 while the second shaft 402' is closer to the underbody of the motor vehicle 1.

The first winding shaft 401 and the second shaft 402' are each connected to the support frame 361 by bearings 410 so as to be able to rotate around a winding axis A1, A2 specific to each winding shaft 401 or 402'. These winding axes A1, A2 are preferably parallel to the first and second crosspieces of the support frame 361.

The first winding shaft 401 to which is fixed the proximal edge 412 of the curtain 404 is connected to a drive device 38 (visible on the ) so as to wind the curtain 404 around said first winding shaft 401 to bring it into the open position and so as to unroll the curtain 404 to bring it into the closed position. This drive device 38 cooperates for example with an actuator 406 fixed to the support frame 361 and connected to the first winding shaft 401 by a gear system (visible on the ).

The shutter device 400 also includes a means 40 for transferring the rotation of the first winding shaft 401 to the second shaft 402'. According to a first embodiment of the transfer means 40 illustrated more particularly in the , the latter may comprise a toothed belt connecting the first winding shaft 401 and the second shaft 402′ via tension pulleys 36 arranged on the support frame 361. Thus, when the first winding shaft 401 is driven in rotation by the drive device 38 under the effect of the actuator 406, the notched belt of the transfer means 40 rotates the second shaft 402'. The notches of this type of belt limit the risks of the latter slipping on the winding shaft 401 and/or the shaft 402' or on the tension pulleys 36 when these parts are rotating. Such a belt equipping the transfer means 40 consumes little energy and efficiently transmits the movement without generating excessive noise.

According to another embodiment (not shown) of the transfer means 40, the latter may comprise at least one pinion arranged on the first winding shaft 401 and the second shaft 402'. Said sprockets are connected by a transmission chain so that when the first winding shaft 401 is driven in rotation by the drive device 38, the assembly formed by the sprockets and the chain drives the second shaft 402′ in rotation. This embodiment advantageously differs from the previous embodiment by its long service life.

Thus, when the curtain 404 is wound around the first winding shaft 401, this corresponds to its open position and the air flow F can circulate through the duct 12 of the guide module 5.

Conversely, when the curtain 404 is unrolled ( ), it extends between the first and the second crosspiece of the support frame 361 in the direction of closing and opening of the curtain 404, then obstructing the flow of air F by thus blocking its passage through the duct 12. This then corresponds to its closed position.

The particularities as to the intermediate position of the curtain 404 in this second embodiment of the guide module 5 have already been explained previously.

A third embodiment of the guide module 5 can be envisaged, this third embodiment is illustrated in particular in FIGS. 8a and 8b. In this third embodiment of the guide module 5, the low temperature radiator 6 and the first heat exchanger 7 are arranged in the same plane which extends perpendicularly to the longitudinal direction X of the conduit 12 of the guide module 5. Such illustrated in Figures 8a and 8b, the low temperature radiator 6 is placed above the first heat exchanger 7. In this particular embodiment, the free portion 72 of the first heat exchanger 7 therefore corresponds to the entire from the inlet side of the first heat exchanger 7.

In this third embodiment, the shutter device can be very similar to that described for the second embodiment. More particularly, the shutter device used in the second and third embodiments of the guide module 5 can be identical, except for the particularities linked to the intermediate position of the curtain 404.

Thus, in this third embodiment of the guide module 5, the shutter device 400 comprises a single curtain 404 secured to a winding shaft 401 which is located on the same side of the conduit 12 as the low temperature radiator 6. , in its intermediate position, the end edge 414 of the curtain 404 is located at the height of a space between the low temperature radiator 6 and the first heat exchanger 7, as illustrated more particularly in the . In other words, when the curtain 404 is in its intermediate position, the curtain covers the unobstructed portion 72 of the first heat exchanger 7, ie the entire inlet face of the first heat exchanger 7. The air flow F therefore circulates mainly through the low temperature radiator 6.

According to a fourth embodiment, not illustrated, of the guide module 5, the shutter device 400 may comprise a plurality of pivoting flaps controlled individually by one or more actuators. In the intermediate position of this closure device 400, the individually controlled pivoting flaps arranged directly opposite the open portion 72 of the first heat exchanger 7 are for example oriented such that they obstruct the passage of the flow of air through said unobstructed portion 72 while the other individually controlled pivoting flaps arranged opposite the low temperature radiator 6 are oriented such that they allow the flow of air to circulate through the duct 12 of the module of guide 5 with the aim of increasing the cooling performance of the low temperature radiator 6.

A regulation method for a guidance module 5 according to any one of the embodiments described above can therefore comprise for example the following steps. When the motor vehicle 1 operates solely on electric power, the actuator 406 moves the shutter device 400 into an intermediate position in which it obstructs the passage of the air flow F through the duct 12 of the guide module 5 only through the open portion(s) 72 of the first heat exchanger 7. When the intermediate position of the shutter device 400 is not suitable for the engine cooling requirements, the actuator 406 can trigger a movement of the closure 400 along the opening direction (respectively the closing direction) from the intermediate position to the open position (respectively closed).

Thus the intermediate position of the shutter device 400 within the guide module 5 of an air flow F makes it possible to regulate the passage of the air flow F through the low temperature radiator 6 and/or the first heat exchanger. heat 7 according to the cooling needs of the motor or motors of the motor vehicle 1 electric or hybrid.

Claims (10)

Guiding module (5) for an air flow (F) for an electric or hybrid motor vehicle (1), said guiding module (5) being intended to be traversed by an air flow (F) and comprising:
- a duct (12) between an inlet opening (14) and an outlet opening (16) of the air flow (F),
- a low temperature radiator (6),
- at least a first heat exchanger (7),
the low temperature radiator (6) and the at least one first heat exchanger (7) being both arranged inside the said duct (12) and intended to be traversed by the flow of air (F), the module guide (5) of the air flow (F) further comprising a closure device (400) movable between a closed position closing the duct (12) of the guide module (5) and an open position to let the air flow (F) through the duct (12) of the guide module (5),
the guide module (5) of the air flow (F) being characterized in that inside the duct (12), the first heat exchanger (7) comprises at least one open portion (72) screw -directly opposite the inlet opening (14) of the duct (12) and in that the shutter device (400) is configured to allow an intermediate position in which said shutter device (400) obstructs only the unobstructed portion(s) (72) of the first heat exchanger (7). Guiding module (5) of an air flow (F) according to the preceding claim, characterized in that the closing device (400) comprises at least one curtain (404, 405) flexible and integral with a shaft roller (401, 402) arranged on one side of the duct (12) of the guide module (5), the shutter device (400) being configured to move the said at least one curtain (404, 405) in a direction of opening and closing, between a closed position closing off the duct (12) and an open position configured to allow the flow of air (F) to pass through the duct (12) of the guide module (5) and in that the device shutter (400) is also able to move said at least one curtain (404, 405) into an intermediate position in which the at least one curtain (404, 405) obstructs only the cleared portion(s) (72) of the first heat exchanger (7). Guiding module (5) of an air flow (F) according to any one of the preceding claims, characterized in that the low temperature radiator (6) and the at least one first heat exchanger (7) are all both arranged upstream of the closure device (400) in the longitudinal direction (X) of the duct (12) of the guide module (5). Guiding module (5) of an air flow (F) according to any one of the preceding claims, characterized in that the low temperature radiator (6) is arranged upstream of the first heat exchanger (7) according to the longitudinal direction (X) of the duct (12) of the guide module (5) and at least partially covers the first heat exchanger (7). Guiding module (5) of an air flow (F) according to Claims 2 and 4 or 2 and 3 and 4, characterized in that the dimension of the low temperature radiator (6) measured in the direction of opening and closure of at least one curtain (404, 405) of the device (400) for shutting off the air flow (F) is less than the dimension of the heat exchanger (7) measured along this same direction and in this that the low temperature radiator (6) is arranged centered relative to the first heat exchanger (7) in the direction of opening and closing of said at least one curtain (404, 405), so that the first heat exchanger ( 7) comprises an open portion (72) on either side of the edges delimiting an inlet face (60) of the low temperature radiator (6). Guiding module (5) of an air flow (F) according to the preceding claim, characterized in that the device (400) for closing off the air flow (F) comprises two flexible curtains (404, 405) distinct arranged on opposite sides of the conduit (12) of the guide module (5) and in that in the intermediate position, the end edges (414) of the two curtains (404, 405) are located at the height of the edges delimiting the inlet face (60) of the low temperature radiator (6). Guiding module (5) of an air flow (F) according to claims 2 and 4, characterized in that the dimension of the low temperature radiator (6) measured along the direction of opening and closing of the at least one curtain (404, 405) of the closing device (400) is smaller than the dimension of the heat exchanger (7) measured along this same direction and in that the low temperature radiator (6) is arranged on one side of the first heat exchanger (7), the low temperature radiator (6) and the first heat exchanger (7) having at least one of their edges aligned with a first side of the conduit (12) of the flow guide module (5) of air (F). Guiding module (5) of an air flow (F) according to the preceding claim, characterized in that the device (400) for closing off the air flow (F) comprises a single curtain (404) flexible and integral with a winding shaft (401) disposed on a second side of the duct (12) of the guide module (5) of the air flow (F), said second side being located opposite the first side of said duct ( 12) and in that in its intermediate position, the end edge (414) of said curtain (404) is located at the height of the edge of the low temperature radiator (6) closest to the second side of the duct (12) of the guide (5). Guiding module (5) of an air flow (F) according to claim 2, characterized in that the low temperature radiator (6) and the first heat exchanger (7) are arranged in the same plane extending perpendicular to the longitudinal direction (X) of the conduit (12) of the guide module (5). Guiding module (5) of an air flow (F) according to the preceding claim, characterized in that the device (400) for closing off the air flow (F) comprises a single curtain (404) flexible and integral with a winding shaft (401) located on the same side of the duct (12) as the low temperature radiator (6) and in that in its intermediate position, the end edge (414) of the said curtain (404) is located at the height of a space between the low temperature radiator (6) and the first heat exchanger (7).