Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B7/00—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins
  • B60B7/0026—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins characterised by the surface
  • B60B7/0066—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins characterised by the surface the dominant aspect being the surface structure
  • B60B7/0086—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins characterised by the surface the dominant aspect being the surface structure having cooling fins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B2900/00—Purpose of invention
  • B60B2900/50—Improvement of
  • B60B2900/513—Cooling, e.g. of brakes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B7/00—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins
  • B60B7/02—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins made essentially in one part
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
  • Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses

Definitions

• WHEEL AERODYNAMIC WHEEL CHOPPING BRAKE BLADES, ORIENTATION AND TRANSVERSAL POSITION
• the invention relates to vehicle wheels, and more specifically the aerodynamic hubcaps intended to equip such wheels.
• Most of the vehicle wheels comprise a rim (generally cylindrical), a web provided with radial apertures and secured to the rim, and a hubcap masking the web and generally secured to the rim.
• hubcaps called “standard” are intended primarily to fulfill a style function, and therefore do not offer optimal aerodynamic characteristics. They generally have numerous and imposing air passages intended to allow the passage of a large amount of air for good cooling of the braking means coupled to the associated wheel rim. However, this type of hubcap degrades the aerodynamics of a vehicle.
• hubcaps fulfill a function of style and offer aerodynamic characteristics that do not degrade (or almost no) the aerodynamics of their vehicle.
• this type of hubcap generally has air passages of small area and therefore that allow a passage of a small amount of air to the braking means coupled to the associated wheel rim, which does not does not allow sufficient cooling of these braking means.
• the invention is therefore particularly intended to improve the situation. It proposes in particular for this purpose an aerodynamic trim, on the one hand, intended to equip a vehicle wheel, having a clean rim to extend in longitudinal, transverse and vertical directions of the vehicle, and a veil provided with radial cutouts , and, on the other hand, comprising blades extending between a central portion and a peripheral edge, separated by air passages and having a profile adapted to deflect a lateral air flow from the outside to the perforations radial or inversely (radial openwork).
• a theoretical thrust axis having a curvature chosen in a first plane constructed from the longitudinal and vertical directions, and placed at a selected distance from a plane parallel to this first plane and located at the interface with the outside of the wheel, and
• the hubcap according to the invention may comprise other features that can be taken separately or in combination, and in particular:
• the curvature chosen may, for example, be between 5 mm and 500 mm;
• the curvature chosen may, for example, be between 80 mm and 180 mm;
• the distance chosen may, for example, be between -5 mm and +30 mm; the negative values being located beyond the interface with the outside, the opposite side to the veil;
• the distance chosen may, for example, be between +6 mm and +18 mm;
• the general inclination chosen may, for example, be between 2 ° and the general inclination chosen may, for example, be between 7 ° and 17 °;
• it can comprise a number of blades equal to the number of radial openings of the veil.
• the invention also proposes a wheel suitable for equipping a vehicle and comprising a rim adapted to extend in longitudinal, transverse and vertical directions of the vehicle, a sail provided with radial apertures, and an aerodynamic hubcap of the type shown in FIG. -before.
• the invention also proposes a vehicle, possibly of automotive type, and comprising at least one wheel of the type of that presented above.
• FIG. 1 schematically illustrates, in a perspective view, a part of an exemplary wheel, comprising a web and a rim welded to each other,
• FIG. 2 schematically illustrates, in a perspective view, the wheel of FIG. 1 with an exemplary embodiment of an aerodynamic trim according to the invention, coupled to its rim,
• FIG. 3 schematically illustrates, in a front view, the wheel of FIG. 2,
• FIG. 4 schematically illustrates the wheel of FIG. 3 in a sectional view along the axis IV-IV (YZ plane), and
• FIG. 5 schematically illustrates the wheel of Figure 3 in a sectional view along the axis V-V.
• the object of the invention is notably to propose an aerodynamic wheel trim EA intended to equip an RV wheel of a vehicle.
• the vehicle is automotive type. This is for example a car. But the invention is not limited to this type of vehicle. It concerns indeed any vehicle comprising at least one wheel comprising a hubcap. Therefore, it concerns at least land vehicles.
• the direction X is a so-called longitudinal direction because it is intended to be parallel to the longitudinal direction of a vehicle
• the Y direction is a transverse direction because it is intended for be parallel to the transverse direction of the vehicle
• the direction Z is a so-called vertical direction because it is intended to be parallel to the vertical direction of the vehicle.
• the longitudinal direction X is therefore perpendicular to the transverse direction Y
• the vertical direction Z is perpendicular to the longitudinal X and transverse Y directions.
• FIGS. 1 and 2 show diagrammatically an exemplary wheel RV of a vehicle, respectively without and with an aerodynamic trim EA according to the invention.
• the wheel RV comprises a rim JR of generally cylindrical shape, a sail VR provided with radial apertures AR and fixedly affixed to the rim JR, and an aerodynamic trim EA placed in front of an outer face of the sail VR (in order to mask ( almost) fully the latter (VR)) and for example fixedly secured to the rim JR.
• the rim JR extends in the longitudinal directions X, transverse Y and vertical Z. It is for example made of steel.
• the sail VR is for example made of steel or aluminum. It comprises a peripheral edge which is preferably welded to an inner face of the rim JR. It will be noted that in the example shown in non-limiting manner in FIGS. 1 and 2, the web VR comprises sixteen AR radial apertures intended to allow the passage of air. But it can include any number of radial apertures AR greater than or equal to two.
• the aerodynamic trim EA is for example fixedly secured by screwing, welding or riveting JR rim. It can be made of metal or plastic, such as a polyamide.
• this trim (aerodynamic) EA comprises a central part PC, a peripheral edge BP surrounding its central part PC, and blades PE extending between (and joining together) its central portion PC and its peripheral edge BP.
• PE blades are separated in pairs by PA air passages and have a profile that is able to deflect a lateral air flow from the outside (of the RV wheel) to the radial apertures AR (of the sail (VR )) or vice versa (AR radial apertures to the outside). The air is thus deflected in the air passages PA defined between the blades PE.
• the central portion PC and the peripheral edge BP are each shaped so as to define air deflectors DA which channel the air to the radial apertures AR, and thus allow to limit turbulence.
• the profile of the PE blades may be that of an aircraft wing.
• the profile may, for example, be that called NACA.
• it may be more precisely a profile called "Clark Y” or “Zhukovsky”, for example.
• a blade PE having an aircraft wing profile comprises a leading edge BA and a trailing edge BF connected by a so-called "intrados" surface, under which there is an overpressure, and by a so-called surface “Extrados", above which there is an underpressure.
• the air to be deflected first reaches the leading edge BA.
• such a PE blade has a so-called theoretical thrust axis passing through all its theoretical thrust centers.
• each PE blade deflects the lateral air flow from the outside (of the RV wheel) to the radial apertures AR (of the sail VR) when its intrados is oriented towards the sail VR, as in the example that is illustrated here.
• each PE blade could have its intrados facing outwards, and in this case the air flow circulates radial apertures AR (VR sail) to the outside (of the RV wheel) .
• blowing mode we are in a so-called blowing mode.
• the hubcap EA comprises a number of PE blades equal to sixteen. This number is therefore equal to the number of radial apertures AR VR veil. Thus, each PE blade is associated with a corresponding radial aperture AR. But this is not obligatory. Indeed, the number of blades PE can take any value greater than or equal to two.
• each blade PE has a theoretical thrust axis, on the one hand, having a selected curvature d in a first plane XZ constructed from the longitudinal X and vertical Z directions (see FIG. 3), and, on the other hand, placed at a selected distance d1 with respect to a plane P1 which is parallel to the first plane XZ and situated at the interface with the outside of the wheel RV (see FIG. 5).
• the chosen distance d1 is that which separates the plane P1 (at the external interface) from the plane P2 (containing the theoretical thrust axis).
• each blade PE has a section, in a second plane YZ constructed from the transverse directions Y and vertical Z, which has a general inclination chosen ⁇ with respect to the first plane XZ.
• the chosen curvature d may be between 5 mm and 500 mm. This depends in particular on the optimization of the incoming air flow (and therefore the efficiency) that one wants to obtain.
• the chosen curvature d may, for example, be between 80 mm and 180 mm. More preferably still, the chosen curvature d may, for example, be equal to about 130 mm.
• the selected distance d1 (between P1 and P2) can be between -5 mm and +30 mm. This depends in particular on the environment of the RV wheel, and in particular the type of rim hook used, the type of tire used or the silhouette of the vehicle. It should be noted that the negative values are here located beyond the interface with the outside (represented by the plane P1), on the side which is opposite the veil VR. Therefore a negative value of d1 means that plane P2 (containing the theoretical thrust axis) is located beyond plane P1 (and therefore outside the RV wheel), while a positive value of d1 means that the plane P2 is located below the plane P1 (and therefore inside the wheel RV, as in the example illustrated in Figures 4 and 5).
• the selected distance d1 may, for example, be between +6 mm and +18 mm. More preferably, the selected distance d1 may, for example, be equal to about +12 mm. Also by way of example, the general inclination chosen ⁇ may, for example, be between 2 ° and 25 °. This depends in particular on the environment of the RV wheel, and in particular the type of rim hook used, the type of tire used or the silhouette of the vehicle.
• the selected overall inclination ⁇ may, for example, be between 7 ° and 17 °. More preferably ecore, the selected general inclination ⁇ may, for example, be equal to about 12 °.
• the length of the blades PE is preferably at least equal to the diameter of the radial apertures AR.
• the invention it is possible to optimize the aerodynamic drag of the vehicle and thus obtain, in particular, a reduction in C0 2 emissions, without this adversely affecting the good cooling of the braking means associated with the wheel, and without this does not lead to a noticeable increase in the cost of the hubcap.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Tires In General (AREA)
• Braking Arrangements (AREA)
• Body Structure For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=55182392

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Family Cites Families (6)

• 2015
  • 2015-11-23 FR FR1561233A patent/FR3043945B1/fr not_active Expired - Fee Related
• 2016
  • 2016-10-21 CN CN201680068438.0A patent/CN108290441A/zh active Pending
  • 2016-10-21 EP EP16809914.1A patent/EP3380339A1/de not_active Withdrawn
  • 2016-10-21 WO PCT/FR2016/052721 patent/WO2017089665A1/fr active Application Filing

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