EP4486607A1 - Système pour le refroidissement d'un disque de frein et procédé de fonctionnement d'un tel système - Google Patents
Système pour le refroidissement d'un disque de frein et procédé de fonctionnement d'un tel systèmeInfo
- Publication number
- EP4486607A1 EP4486607A1 EP23703246.1A EP23703246A EP4486607A1 EP 4486607 A1 EP4486607 A1 EP 4486607A1 EP 23703246 A EP23703246 A EP 23703246A EP 4486607 A1 EP4486607 A1 EP 4486607A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- duct
- deflector
- vehicle
- inlet opening
- conduit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T5/00—Vehicle modifications to facilitate cooling of brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
- F16D65/84—Features relating to cooling for disc brakes
- F16D65/847—Features relating to cooling for disc brakes with open cooling system, e.g. cooled by air
Definitions
- the invention relates to a system for the controlled cooling of a brake disc.
- the invention also relates to a vehicle, in particular an automobile, comprising such a system.
- the invention also relates to a method of operating such a system or such a vehicle.
- Motor vehicles comprising air inlets at the front of the vehicle or on the sides of the vehicle to cool the brake discs.
- the object of the invention is to provide a system for the controlled cooling of a brake disc and a method of operating such a system remedying the above drawbacks and improving the devices and methods known from the prior art.
- the invention makes it possible to produce a system and a method which are simple and which have a reduced cost and which make it possible to optimize the compromise between a high cooling capacity of the brakes and a reduced aerodynamic drag.
- the invention relates to a system for the controlled cooling of a braking system, in particular a brake disc of a vehicle automobile, comprising a duct, for airflow, and a deflector, the duct comprising an inlet opening and an outlet opening, the deflector being arranged upstream along a longitudinal direction of the opening of entry of the duct, the deflector being movable between a deployed position towards the duct inlet opening, in particular a deployed position such as to reduce the aerodynamic drag of the motor vehicle, and a folded position at a distance from the opening of the duct entrance.
- the main direction of the duct can have an angle of inclination between 10° and 45° with respect to the longitudinal direction.
- the deflector may be capable of pivoting between the deployed position in which the deflector is perpendicular or substantially perpendicular to the longitudinal direction, and the folded-down position in which the deflector is parallel or substantially parallel to the longitudinal direction.
- One end of the baffle can be pivotally mounted at a location close to the duct inlet opening.
- the duct outlet opening may have a smaller area than the duct inlet opening.
- the conduit outlet opening may have a rectangular or substantially rectangular shape.
- the duct may comprise a first tubular section extending along the main direction of the duct and a second tubular section, the main direction of elongation of the second tubular section forming an angle with the main direction of the duct, the angle being for example included between 0° and 45°.
- the invention also relates to a vehicle, in particular a motor vehicle, comprising a system defined above, the inlet opening of the duct being located at a location of a base of the vehicle, the outlet opening of the duct being located at a location in against a brake disc.
- the deflector may be capable of extending perpendicularly or substantially perpendicular to an underbody of the vehicle in the deployed position, and the deflector may be capable of extending into contact with an underbody of the vehicle in the folded position.
- the invention also relates to a method for operating a previously defined system or for operating a previously defined vehicle, comprising: a step of comparing the speed of the vehicle with respect to a threshold value; and if the speed of the vehicle is lower than the threshold value, placing the system in a braking performance mode in which the deflector is in the folded-down position; if the speed of the vehicle is greater than or equal to the threshold value, placing the system in an aerodynamic performance mode in which the deflector is in the deployed position.
- Figure 1 schematically shows an embodiment of a system for the controlled cooling of a brake disc of a vehicle, the deflector being in the deployed or open position.
- Figure 2 schematically shows an embodiment of a system for the controlled cooling of a brake disc of a vehicle, the deflector being in the folded or closed position.
- Figure 3 is a bottom view schematically representing an embodiment of a system for the controlled cooling of a brake disc of a vehicle, the deflector being in the deployed or open position.
- Figure 4 is a bottom view schematically representing an embodiment of a system for the controlled cooling of a brake disc of a vehicle, the deflector being in the folded or closed position.
- the invention proposes a system for the controlled cooling of a brake disc, in particular of a motor vehicle, making it possible to optimize the compromise between high aerodynamic performance of the vehicle, in particular reduced aerodynamic drag, and high cooling capacity.
- the braking system or the brakes, in particular the brake discs of the vehicle Thanks to the active control of the system, depending on the operating conditions of the vehicle, high aerodynamic performance of the vehicle, in particular reduced aerodynamic drag, or high cooling capacity of the brake discs can be easily obtained when required.
- FIGS. 1 to 4 An embodiment of a system 5 for the controlled cooling of a braking system 3, in particular of a brake disc 31, in particular of a vehicle 1, is described below with reference to FIGS. 1 to 4 .
- the vehicle 1 can be a motor vehicle.
- An orthonormal XYZ frame is defined, in which the X axis designates the longitudinal direction in which the vehicle usually moves in a straight line, and is oriented from the front to the rear of the vehicle, or from the upstream to the downstream.
- the Y axis designates the transverse direction of the vehicle and is oriented from the left side to the right side of the vehicle.
- the Z axis designates the vertical direction, and is oriented from the bottom to the top, from the lower part to the upper part of the vehicle.
- the system 5 comprises a conduit 6, in particular of tubular shape.
- the conduit 6 is intended for a flow or circulation or passage of a fluid, in particular air.
- Duct 6 includes an inlet opening 7 and an outlet opening 8.
- the conduit 6 is for example intended to be connected to a base 23 of a vehicle 1.
- the conduit 6 comprises for example at least one tubular section 61, 62.
- the conduit 6 comprises at least a first tubular section 61 extending in a main direction A1, from the inlet opening 7.
- the duct 6 extends in particular along a main direction, or main direction of elongation, A1.
- the duct 6 is arranged at an angle relative to the longitudinal direction X.
- the main direction A1 of the conduit 6 forms an angle a called angle of inclination, with the longitudinal direction X.
- the angle of inclination a between the main direction A1 of the duct 6 and the longitudinal direction X can be between 10° and 45°.
- the angle of inclination a may in particular be chosen according to the vehicle 1 and/or according to the dimensions of a wheel 2 of a vehicle 1 .
- the duct 6 is inclined so as to emerge in the downstream direction with respect to the longitudinal direction X.
- the main dimension of the cross section of the first tubular section 61 of the conduit 6, in particular the diameter d of the cross section of the first tubular section 61 of the conduit 6, is for example between 50 mm and 150 mm, for example of the order 100mm.
- System 5 further comprises a motorized deflector 10.
- the deflector 10 is for example a shutter.
- the deflector 10 has for example the shape of a wall or low wall, in particular rectangular, of height or length h and of width W.
- height or length h of the deflector is meant the largest dimension of the deflector measured in a direction perpendicular to the transverse direction Y.
- width W of the deflector is meant the dimension of the deflector in the transverse direction Y.
- the height h of the deflector is for example between 100 mm and 150 mm, for example of the order of 120 mm.
- the deflector 10 can be arranged in the immediate vicinity of the conduit 6.
- the deflector 10 can be arranged upstream along the longitudinal direction X of the inlet opening 7 of the duct 6.
- the deflector 10 can be arranged in front of the inlet opening 7 of the duct along of the longitudinal direction X.
- the deflector 10 can be movable between a deployed position towards the inlet opening 7 of the duct 6 and a folded position at a distance from the inlet opening 7 of the duct 6.
- the deflector 10 In the deployed position (or open position) of the deflector 10, the deflector 10 interferes with the entry direction or main direction A1 of the duct 6.
- the deployed position of the deflector 10 may in particular be such as to reduce the aerodynamic drag of the vehicle. This improves the aerodynamic performance of the vehicle. This results in particular in reduced energy consumption of the vehicle.
- the deflector 10 In the folded position (or closed position) of the deflector 10, the deflector 10 is without interference with the direction of entry or main direction A1 of the duct 6.
- the closed position of the deflector 10 is the default position of the deflector 10.
- the height h of the deflector 10 can be chosen according to the shape and/or the dimensions of the inlet opening 7 of the duct 6.
- the height or length h of the deflector 10 is for example greater than or equal to 100 mm.
- the width W of the deflector 10 is for example greater than or equal to 150 mm.
- the deflector 10 can be plastic.
- the deflector 10 may be capable of pivoting between an extended position in which the deflector is perpendicular or substantially perpendicular to the longitudinal direction X, and a folded position in which the deflector is parallel or substantially parallel to the longitudinal direction X, in particular perpendicular or substantially perpendicular to the Y axis or perpendicular or substantially perpendicular to the Z axis.
- the deflector 10 may be capable of pivoting through an angle (
- ) is for example zero.
- the deflector 10 can in particular be in a horizontal or substantially horizontal position.
- ) is for example equal to 90°.
- the deflector 10 can in particular be in a vertical or substantially vertical position.
- One end 11 of the deflector 10 can be mounted in a pivot connection at a location close to the inlet opening 7 of the duct 6.
- the outlet opening 8 of the duct 6 may have a surface area smaller than the surface of the inlet opening 7 of the duct 6. This results in better focusing of the air flow at the outlet of the duct 6.
- the surface of the outlet opening 8 of the duct 6 is for example of the order of 15% to 30% smaller than the surface of the inlet opening 7 of the duct 6.
- the surface of the inlet opening 7 of the duct 6 is for example of the order of 10,000 mm 2
- the surface of the outlet opening 8 of the duct 6 is for example of the order of 8000 mm 2 .
- the inlet opening 7 of the duct 6 can have a round or rectangular or oval shape or an irregular shape.
- the outlet opening 8 of the duct 6 can have a round or rectangular or oval shape or an irregular shape.
- the inlet opening 7 of the duct 6 has for example a round shape.
- the outlet opening 8 of the duct 6 has for example a rectangular shape.
- the outlet opening 8 of the duct 6 has a rectangular or substantially rectangular shape.
- the shape of the duct 6 at the location of the outlet opening 8 is different from the shape of the duct 6 upstream of the outlet opening 8.
- the shape of the duct 6 at the location of the opening outlet 8 can in particular be chosen so that conduit 6 does not come into abutment against one or more elements of a wheel 2 or against one or more elements associated with a wheel 2 of a vehicle 1 .
- the duct 6 has a local modification of its shape, in particular of its cross-section, at the outlet, with respect to the rest of its length.
- the shape of the duct 6 changes for example from a cylindrical shape to a parallelepipedic shape from the inlet to the outlet or from upstream to downstream of the duct 6.
- the duct 6 has for example a circular section over a major part its length from the inlet opening 7, and may have in particular at the location of the outlet opening 8 and possibly near the outlet opening 8 a rectangular cross-section.
- the duct 6 may include an elbow 9.
- the elbow 9 is intended to optimize the orientation of the flow of air leaving the duct 6, in particular so that the flow of air leaving the duct 6 reaches the region of a disc brake 31 the most favorable to cool the brake disc.
- Elbow 9 of duct 6 can be located at a location along the length of the duct intended to coincide with the beginning of a passage of a wheel 2.
- Elbow 9 is for example intended to be located at the location of a structure which frames a wheel 2, in particular at the location of a wheel frame or a wheel arch.
- the conduit 6 comprises for example a first tubular section 61 extending in particular along the main direction A1 and a second section 62.
- the second section 62 of the conduit 6 can be tubular.
- the second section 62 of the duct 6 can extend along a main direction, or main direction of elongation, A2.
- the first tubular section 61 extends in particular from the inlet opening 7 of the conduit 6 to the elbow 9, the second section 62 extending in particular from the elbow 9 to the outlet opening 8.
- the main direction A1 of the first tubular section 61 and the main direction A2 of the second tubular section 62 form, for example, an angle ⁇ comprised between 0° and 45°.
- the modification of the main direction of the conduit 6 for the second section 62 with respect to the first section 61, or in other words the fact that the conduit 6 comprises an elbow 9, makes it possible in particular to optimize the flow of fluid on the system and therefore to optimize the ventilation of a braking system 3, in particular a brake disc 31, by the air leaving the duct 6 further downstream compared to the case where the duct 6 would extend in the main direction A1 over the entire its length.
- the first tubular section 61 has for example a cylindrical shape, in particular of revolution.
- the second tubular section 62 has for example a cylindrical shape, in particular of revolution, except at its downstream end or at the outlet of the conduit 6 and possibly near the outlet opening 8 of the conduit 6.
- the length L1 of the first tubular section 61 is for example between 100 mm and 200 mm, for example of the order of 150 mm.
- the length L2 of the second tubular section 62 is for example between 50 mm and 150 mm, for example of the order of 100 mm.
- the elbow 9 of the duct 6 is intended in particular to optimize the direction and/or the position of a flow of air leaving the duct 6.
- the shape of the duct 6 at the outlet (or at its downstream end) and/or the elbow 9 of the duct 6 are intended in particular to optimize the ventilation of a brake disc 31 of a wheel 2, by optimizing the flow of air coming out of conduit 6.
- the shape of the duct 6 at the outlet and/or the elbow 9 of the duct 6 make it possible in particular to escape the constraints, in particular in terms of size, linked to a rim of a wheel 2.
- the duct 6 can be configured so that an air flow leaving the duct 6 reaches a brake disc 31 and ventilates it, without the duct 6 being in contact with the brake disc 31, which makes it possible to avoid damaging the brake disc 31, in particular by preventing the duct 6 from creating possible impacts on the brake disc 31.
- the shape and/or the position of the outlet 8 or of the downstream end of the duct 6 can be chosen according to the vehicle 1 .
- the shape and/or the dimensions of the duct 6 may be chosen so as to allow an optimized air flow, in particular to improve the distribution of the air flow or the ventilation of the brake disc 31, in particular to ensure rapid cooling of a brake disc 31.
- the system 5 can further comprise an actuator connected to the deflector 10.
- the actuator can be active.
- the actuator can be controlled by a computer, in particular by a computer of a vehicle 1.
- the actuator can in particular be controlled, in particular actively, according to the speed of the vehicle 1 .
- the vehicle 1 comprises at least one wheel 2 and at least one braking system 3 associated with the at least one wheel 2.
- the braking system 3 is in particular a disc brake system.
- the braking system 3 comprises for example a brake disc 31 and a brake caliper 33 comprising brake pads.
- the vehicle 1 comprises for example a front part 21 and a base or underbody 23.
- the inlet opening 7 of the conduit 6 can be located at a location of the base 23 of the vehicle 1.
- the conduit 6 can be connected to the base 23 of the vehicle 1.
- the deflector 10 can be arranged upstream of the duct 6.
- the deflector 10 can be arranged in the immediate vicinity of the duct 6.
- the conduit 6 can be connected to the base 23 so that the main direction A1 of the conduit 6 forms an angle a of between 10° and 45° with respect to the base 23 of the vehicle 1.
- the outlet opening 8 of the duct 6 can be located at a location opposite a brake disc 31 .
- the main direction of conduit 6 at the outlet of conduit 6 is preferably offset with respect to an axis of rotation of a wheel 2.
- the deflector 10 is for example capable of extending perpendicularly or substantially perpendicularly to the base 23 of the vehicle 1 in the deployed position.
- the deflector 10 is for example able to extend in contact with the underbody 23 of the vehicle 1 in the folded position.
- the actuator is arranged in the base 23 of the vehicle 1.
- the flow direction D of the air flow is for example parallel or substantially parallel to the longitudinal direction X.
- the flow direction of the air flow is represented by an arrow 4.
- the air flow represented by an arrow 4 is in particular a direct or frontal airflow.
- the direction of flow D and the longitudinal direction X are in particular oriented in the same direction.
- the direction of rotation of a wheel 2 of vehicle 1 is represented by an arrow 24.
- the duct 6 of the system 5 is inclined so as to emerge in the direction of the downstream with respect to the direction of air flow D.
- FIGs 1 and 3 schematically show the system 5 in operation, when the deflector 10 is in the deployed or open position.
- the deflector 10 In the deployed position of the deflector 10, the deflector 10 interferes with the direction of entry of the duct 6. The deflector 10 interferes with the main direction A1 of the duct 6. The deflector 10 in the deployed position makes it possible to limit the circulation of air in the duct 6 and to limit the formation of an air compression zone just in front of the wheel, this air compression greatly impairing the aerodynamic performance. He This results in particular in a reduction in the aerodynamic drag of the vehicle. This makes it possible to optimize the aerodynamic performance of the vehicle.
- FIGS 2 and 4 schematically show the system 5 in operation, when the deflector 10 is in the folded position.
- the deflector 10 In the folded down position of the deflector 10, the deflector 10 is without interference with the direction of entry of the duct 6. The deflector 10 does not interfere with the main direction A1 of the duct 6. Air circulates or flows in duct 6. Arrow 14 represents an air flow flowing in duct 6, from the inlet to the outlet of duct 6, from upstream to downstream of duct 6.
- the inlet opening 7 of the conduit 6 is located at a location of a base 23 of the vehicle 1.
- the flow of air flowing in the duct 6 can thus advantageously come from a direct flow of air and/or from a frontal flow and/or from a flow of air flowing under the vehicle.
- the system 5 is for example controlled, in particular in an active manner, to cause the deflector 10 to pass from the deployed position to the folded-down position and vice versa.
- the system 5 is for example controlled, in particular actively, by an actuator, in particular of the type described above.
- the invention proposes a method for the active control of the deflector 10 of the system 5. Such a method is intended in particular to improve the cooling capacity of the brakes and the aerodynamic performance of the vehicle.
- the deflector 10 is able to be controlled according to the need for cooling a brake disc 31 of a vehicle 1 and/or the need for aerodynamic performance.
- the system 5 is for example capable of operating according to two modes: a braking performance mode and an aerodynamic performance mode.
- the braking performance mode of the system 5 or of the vehicle 1 corresponds to the operating mode of the system 5 described in relation to FIGS. 2 and 4.
- the aerodynamic performance mode of the system 5 or of the vehicle 1 corresponds to the operating mode of the system 5 described in relation to Figures 1 and 3.
- system 5 When efficient cooling of the brakes, in particular of a brake disc, of the vehicle is required or in the event of a high need for cooling of the brakes, in particular of a brake disc, for example in town or in traffic jams , system 5 operates in braking performance mode.
- the deflector 10 is in the folded position (FIGS. 2 and 4). Air flows through duct 6 to directly cool brake disc 31.
- the system 5 When a high aerodynamic performance of the vehicle is required, for example on a highway, the system 5 operates in aerodynamic performance mode.
- the deflector 10 is in the deployed position (FIGS. 1 and 3), in particular so that the deflector 10 can limit the circulation of air in the duct 6 and therefore prevent it from hitting or directly reaching the wheel 2.
- the deployed position of the deflector 10 allows the high pressure area on the tire surface of wheel 2 to be reduced. As a result, aerodynamic drag can be reduced, thereby reducing the power consumption of vehicle 1.
- the method may include a step of comparing the speed of vehicle 1 with a threshold value.
- the vehicle speed threshold value is for example of the order of 100 km/h.
- a bet of the system 5 and/or of the vehicle 1 in a braking performance mode in which the deflector 10 is in the folded down position If the speed of the vehicle 1 is lower than the threshold value, in particular lower than 100 km/h, a bet of the system 5 and/or of the vehicle 1 in a braking performance mode in which the deflector 10 is in the folded down position.
- the system 5 and/or the vehicle 1 is placed in an aerodynamic performance mode in which the deflector 10 is in the deployed position.
- An advantage of a method of the type described above lies in the fact that it makes it possible to optimize the compromise between low aerodynamic drag and high cooling capacity of the brakes. Such an active control method makes it easy to obtain low aerodynamic drag and high brake cooling capacity when required.
- An advantage of a system of the type described above lies in the fact that it is easy to manufacture and/or to assemble.
- An advantage of a system of the type described above is that it has a reduced cost.
- a system 5 has been described above for the controlled cooling of a brake disc 31 of a braking system 3 associated with a wheel 2.
- a system 5, comprising a conduit 6 and a deflector 10 and possibly an actuator may be provided for several wheels 2 of a vehicle 1, in particular for each wheel 2 of a vehicle 1.
- a system has been described above for the controlled cooling of a brake disc in the case of a motor vehicle. Such a system could be used for other types of vehicles than a motor vehicle. Such a system could in particular be used for high-speed trains, for which an optimization of the performances vehicle aerodynamics and vehicle brake cooling performance is required.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2201747A FR3133068B1 (fr) | 2022-02-28 | 2022-02-28 | Système pour le refroidissement d’un disque de frein. |
| PCT/EP2023/053184 WO2023161033A1 (fr) | 2022-02-28 | 2023-02-09 | Système pour le refroidissement d'un disque de frein et procédé de fonctionnement d'un tel système |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4486607A1 true EP4486607A1 (fr) | 2025-01-08 |
Family
ID=82100342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23703246.1A Pending EP4486607A1 (fr) | 2022-02-28 | 2023-02-09 | Système pour le refroidissement d'un disque de frein et procédé de fonctionnement d'un tel système |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4486607A1 (fr) |
| FR (1) | FR3133068B1 (fr) |
| WO (1) | WO2023161033A1 (fr) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010037615B4 (de) * | 2010-09-17 | 2023-07-20 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Luftleiteinrichtung zur Kühlerabluftführung für eine Kühlereinheit |
| US8631889B2 (en) * | 2011-06-20 | 2014-01-21 | David Begleiter | Combined condensation radiator fan module and brake cooling duct shutter system |
| CN108698650A (zh) * | 2016-03-01 | 2018-10-23 | 法拉第未来公司 | 主动空气进气口 |
| US20170299006A1 (en) * | 2016-04-15 | 2017-10-19 | GM Global Technology Operations LLC | Active airflow deflector for brake cooling |
-
2022
- 2022-02-28 FR FR2201747A patent/FR3133068B1/fr active Active
-
2023
- 2023-02-09 EP EP23703246.1A patent/EP4486607A1/fr active Pending
- 2023-02-09 WO PCT/EP2023/053184 patent/WO2023161033A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023161033A1 (fr) | 2023-08-31 |
| FR3133068B1 (fr) | 2024-03-15 |
| FR3133068A1 (fr) | 2023-09-01 |
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