JP2024504833A - Motorcycle with fairing with front opening for air inflow - Google Patents

Abstract

In the motorcycle (1) with a fairing, a front opening (23) is provided in the front portion of the fairing (21) in order to promote the inflow of air into the fairing (21) from the front. The front opening (23) has a reduced vertical extension relative to the fairing itself, so that the upper area of the front part of the fairing is created by the forward movement of the motorcycle (1). It is open to allow direct inflow of air flow (F). Conversely, the lower region of the front part of the fairing (21) is closed by a cover (31) forming an aerodynamic profile with a front outer surface (31a) and a rear inner surface (31b), which The cover divides the descending airflow into an outer partial flow (FA) and an inner partial flow (FB). [Selection diagram] Figure 4

Description

The present invention relates to motorcycles cooled with water or other liquid coolants and equipped with fairings, such as, but not limited to, racing motorcycles.

High-performance motorcycles typically include an internal combustion engine that is cooled with a liquid coolant, such as water or an aqueous mixture. A radiator for cooling liquid coolant is usually located between the front wheels and the engine. Particularly in racing motorcycles, the engine and motorcycle frame are often at least partially surrounded by a fairing. The fairing has an opening at the front to allow airflow generated by the movement of the motorcycle to enter the radiator.

In particular, many efforts have been made to improve the air flow within the radiator, with the aim of reducing the negative effects of the presence of front steered wheels with respective suspension and steering columns. In fact, these components prevent the airflow generated by the forward movement of the motorcycle from freely entering the radiator.

For example, W02020/115636 discloses a motorcycle in which a front steering wheel is associated with a system for flowing air laterally, the system at least partially surrounding the front steering wheel and in which the motorcycle The airflow generated by the forward movement of the radiator is collected forward and transported towards the front of the radiator.

Despite these improvement efforts, engine efficiency and There is a continuing need to improve the cooling conditions of engines, especially high-performance motorcycles, in order to increase power output.

In short, in order to make the entry of the air flow generated by the forward movement of the engine into the fairing more efficient, for example, improving the conditions for heat removal from the radiator located in the volume defined by the fairing In order to do so, the fairing has a front part with a front opening that extends downward from the highest point without reaching the bottom part of the fairing, but is defined by two bifurcated surfaces that define an aerodynamic profile. The front cover remains. More particularly, said cover is located below the front opening, between the front opening and the bottom part of the fairing, and between the right and left parts of the fairing. The cover has a front outer surface facing in the direction of travel of the vehicle, ie towards the front steering wheels. The cover also has a rear inner surface facing the engine.

The rear inner surface and the front outer surface are joined together along a leading edge of an aerodynamic profile, the leading edge being along an edge surrounding a front opening of the fairing; The fairing spreads downward, that is, toward the bottom portion of the fairing.

The aerodynamic profile formed by the rear inner surface and the front outer surface is generated by the forward movement of the motorcycle and directs the airflow with a downward velocity component along the front outer surface and the rear inner surface. Split into two streams covering the profile. This creates particularly advantageous conditions in terms of the ground contact of the motorcycle while driving, and also facilitates and promotes the entry of air into the interior of the fairing.

In general, this airflow entering the internal volume of the fairing has a positive effect on the cooling conditions, regardless of the fact that the engine is cooled completely or partially by liquid and/or forced air convection.

However, in a particularly advantageous embodiment, the motorcycle has at least one radiator for dissipating the heat generated by the engine. The radiator may be a radiator for cooling lubricating oil or a radiator for cooling water or another liquid coolant, for example a mixture of water and antifreeze or the like. In general terms, we refer to liquid coolant herein to mean any fluid in liquid form that can circulate within a radiator and dissipate heat generated within an engine. Accordingly, the term liquid coolant herein optionally also includes lubricating fluids (lubricating oils).

If the motorcycle has a radiator located behind the front opening of the fairing, i.e. between the front opening and the engine, and perpendicular to the forward direction of the motorcycle, the cover will cover the radiator. Define a flow path approximately parallel to the front surface. The aerodynamic profile defined by the part forming the cover of the fairing intercepts the airflow whose direction of flow is inclined downward and divides said airflow into a front partial flow which covers the front external surface and which enters the fairing. and a rear partial flow that is sent toward the inner heat dissipation surface. If at least one radiator is provided, this rear partial flow is directed towards the radiator.

If a radiator is present behind the cover, the rear partial flow generated by the aerodynamic profile of the cover and coming from the forward area around the front steering wheel is directed towards the channel formed in front of the front of the radiator. , is routed between the front surface of this radiator and the rear inner surface of the aerodynamic profile.

In addition to promoting and improving air ingress for the purpose of cooling the fairing interior, the cover can have additional benefits. In particular, if at least one radiator is located aft of the front opening of the fairing and is at least partially covered by a cover, this may be caused by stones or other debris thrown rearward by the front steering wheel. achieve the effect of mechanically protecting the radiator from accidental impacts.

Furthermore, the front steering wheel has the effect of directing hot air from the ground towards the front part of the fairing. This flow of hot air can reduce heat exchange efficiency, especially if the radiator is located just inside the front opening. The cover reduces this negative thermal effect.

Further advantageous features and embodiments of the motorcycle are defined in the appended claims forming a part of this specification.
The invention will be better understood by following the description and accompanying drawings, which illustrate non-limiting examples of the invention.

FIG. 1 is a side view of a motorcycle in one embodiment. FIG. 2 is a front view of the motorcycle of FIG. 1; FIG. 2 is a perspective view of the motorcycle. It shows a side view of the front part of the motorcycle and a partial cross-section on the midplane. FIG. 2 is a perspective view of the front portion of the motorcycle. FIG. 3 is a perspective view of the lower rear side of the motorcycle. FIG. 3 is a side view of the rear portion of the motorcycle. It is a schematic sectional view along the horizontal plane of a part of a rear fork and a rear drive wheel. 1 is a schematic side view of a motorcycle showing the ground force generated by airflow in the lower portion of the fairing; FIG. FIG. 8 is a side view corresponding to FIG. 7 in another embodiment.

In this specification, unless otherwise specified, "upper", "lower", "top", "bottom", "right", "left", "upper", "lower", "front", "rear", "front" and "rear" are used. The term, and similar terms defining the spatial location of airflow around or around elements or components of a motorcycle, refers to the motorcycle in its normal riding position. Further, the term "vertical" indicates a direction parallel to the direction of gravity, and the term "horizontal" indicates a direction perpendicular to the vertical direction. In FIG. 2, arrows L and R indicate left and right directions, and arrows U and D indicate vertical directions.

As will be described in detail below with reference to non-limiting examples, a motorcycle is provided that includes a fairing having a front portion facing a front steered wheel. The forward portion includes a forward opening extending above the vertical extension of the forward portion of the fairing and a cover extending below the vertical extension of the forward portion of the fairing. The cover has a front outer surface and a rear inner surface, and the cover is configured to channel downward airflow generated by forward movement of the motorcycle into an outer partial airflow covering the front outer surface and an inner partial airflow covering the rear inner surface. Divide into. In embodiments described herein, the front outer surface and the rear inner surface together form an aerodynamic profile with a leading edge disposed around the periphery of the fairing's front opening.

Referring to the embodiment shown in the accompanying drawings, a motorcycle 1 includes a frame 3 to which a seat 5 and an engine 7 are fixed. The motorcycle 1 has a front steering wheel 9 at the front, which is connected to a handlebar 11 and associated with a suspension comprising a front fork 12 in the illustrated embodiment. The motorcycle 1 further includes a rear drive wheel 13, and the rear drive wheel 13 is connected to the engine 7 via a transmission (not shown), such as a chain. The rear drive wheel 13 is supported by a rear fork 17, and the rear fork 17 is pivoted to the frame 3 about a hinge axis A (FIG. 7) that is parallel to the rotation axis of the rear drive wheel 13. There is.

The engine 7 is cooled by a liquid coolant, for example water. Heat extracted from the engine 7 must be dissipated to the surrounding environment. In the illustrated embodiment, at least one radiator 19 is provided for this purpose, typically mounted between the engine 7 and the front steering wheels 9. In the illustrated embodiment, there are two radiators 19, for example one radiator for cooling water (or other liquid coolant) and the other radiator for cooling lubricating oil. . In general terms, the motorcycle 1 can have a single radiator, for example for cooling water or lubricating oil, or, as in this example, two radiators, one for cooling water and one for lubricating oil. It is also possible to have In this specification and the appended claims, the term liquid coolant also refers to lubricating oil.

The features of the fairing described herein are particularly advantageous in motorcycles having at least one radiator, preferably arranged such that its major surface is perpendicular to the direction of movement of the vehicle, but air-cooled Some advantages can also be obtained in type motorcycles and/or motorcycles with one or more radiators in different positions. The term "direction of movement" refers to the direction in which the motorcycle moves without turning the steering wheel, that is, the direction in which the motorcycle moves straight.

If at least one radiator 19 is provided, heat is removed by the air flow generated by the movement of the motorcycle. Said air flow contacts and passes through the radiator 19, covering the duct through which the liquid coolant (water, oil) passes. In the illustrated embodiment, there are two radiators 19.

The frame 3 and engine 7 are at least partially protected by a front fairing 21, which includes a front windshield 22 to protect the handlebars and onboard instruments as well as the driver. .

Further, the fairing 21 has a left side portion 21A and a right side portion 21B that at least partially sandwich the engine 7, and when the motorcycle 1 is moving, the fairing 21 allows air to flow beyond the range of the driver G of the motorcycle 1. It has a structure that deflects it. Reference numeral 34 designates the bottom portion, or lower wall, of the fairing 21, which faces the ground on which the motorcycle is supported and connects the left and right portions 21A and 21B of the fairing. The bottom portion 34 passes below the radiator 19 and below the engine 7 of the motorcycle 1, and extends from the front portion of the fairing 21 toward the rear drive wheel 13.

The front portion of the fairing 21 extends from the windshield 22, behind the front steered wheels 9, to the bottom 34, and between the left and right portions 21A and 21B of the fairing. The front part has a front opening 23 surrounded by an edge 25. The front opening 23 allows airflow generated by the forward movement of the motorcycle to enter the interior of the fairing toward the engine 7. If at least one radiator is present, the airflow is typically arranged behind the front opening 23 inside the fairing 21 and between the edge 25 of the front opening 23 and the engine 7. collide with the radiator.

The front steering wheel 9 and the front fork 12 form an obstruction that impedes the movement of the airflow towards the inside of the fairing 21 and in particular towards the radiator or radiators 19 if present.

The front opening 23 that allows cooling air to enter the radiator 19 is not present in the entire front part of the fairing 21, but rather in the front cover 31, which extends from the bottom 34 of the fairing 21 towards the windshield 22. Due to the presence, only a portion of the heightwise extension of the front part of the fairing extends from the highest point of the fairing 21 adjacent to the windshield 22 to the bottom of the fairing 21. If the motorcycle has at least one radiator 19 arranged behind the opening 23, at least a part of the front face of the at least one radiator is partially covered by a front cover 31 formed by the fairing 21. This cover 31 forms a pocket (FIG. 3) in the lower region of the front part of the fairing 21, which pocket forms a pocket in the front side of the radiator 19, i.e. in the illustrated example the lower radiator 19. Although it partially covers the surface facing the direction of movement of the motorcycle 1, the upper radiator 19 is completely free. It is more or less completely visible through the opening 23. The edge 25 surrounding the front opening 23 is therefore not completely external to the effective surface of the radiator, but has a lower part located at a height substantially higher than the lowest point of the radiator 19. There is.

The part of the fairing 21 forming the cover 31 of the radiator 19 defines an aerodynamic profile, again designated here by 31, as can be seen in particular in FIG. More specifically, the cover 31 includes a front outer surface 31a facing forward with respect to the forward direction of the motorcycle 1 (arrow FF). Furthermore, the cover 31 includes a rear inner surface 31b facing in a direction opposite to the forward direction of the motorcycle 1 and thus facing the radiator 19. The front outer surface 31a and the rear inner surface 31b are joined to form a front edge 31c (see especially FIG. 4), and the front edge 31c forms a part of the edge 25 surrounding the front opening 23. .

Referring to FIG. 4, reference numeral 25A indicates the highest point of the edge 25 surrounding the front opening 23. Therefore, the reference numeral 25A is the upper end of the front opening 23. Typically, this highest point 25A is located on the vertical center plane of the motorcycle 1. In FIG. 4, the symbol H indicates the distance from the bottom 34 of the fairing 21 to the upper end 25A of the front opening 23. The symbol h indicates the distance between the upper end 25A of the front opening 25 and the guiding edge 31c of the aerodynamic profile formed by the cover 21. The distance h is preferably 20% or more of the distance H. Preferably, distance h is 80% or less of distance H. For example, the distance h should be between 10% and 60% of the distance H, preferably between 20% and 50% of the distance H, more preferably between 20% and 50% of the distance H, or between 20% and 40%. I can do it.

The aerodynamic profile 31, more precisely its front outer surface 31a, is joined laterally to the left side part 21A and right side part 21B (FIG. 2) of the fairing 21 and at the bottom to the lower wall of the fairing 21, i.e. to the bottom part. 34. Preferably, the front outer surface 31a abuts the side portions 21A and 21B and the bottom portion 34, defining a cornerless joining curve for aerodynamic purposes.

The rear inner surface 31b is arranged at a certain distance from the front surface of the radiator 19, and air flow enters between the radiator 19 and the rear inner surface 31b of the cover 31 in a direction substantially parallel to the front surface of the radiator 19. form a passageway.

In the side view, the front outer surface 31b of the cover 31 may be mainly convex, but the portion near the front edge 31c may have a concave shape, as seen in the accompanying drawings. In fact, in some embodiments, in a cross-sectional view of the fairing 21 according to the vertical midplane, the front outer surface 31a, starting from the leading edge 31c, has a first concave portion and a second convex portion. It has a profile having a shaped portion. The convex portion continues downwardly until it joins the lower outer surface of the portion of the lower fairing 34 that extends below the engine of the motorcycle.

However, the anterior outer surface 31a has a predominantly (or completely) convex, i.e., forward-facing, convex portion, whereas the posterior inner surface 31b has a predominantly (or completely) concave, i.e., posteriorly facing convex portion. It has a concave portion. Substantially, the intersection between the vertical mid-plane of the motorcycle 1 and the part of the fairing forming the cover 31 defines two curves, one primarily convex pointing forward and the other curved. is mainly concave, facing backwards.

The two surfaces 31a and 31b can be formed by two separate metal plates joined together along the leading edge 31c.

In an advantageous embodiment, in side view, the part of the front outer surface 31a of the cover 31 which defines the convexity projects forwardly forming an ogival-shaped or spherical part of the fairing 21. , which reduces the aerodynamic drag coefficient of the motorcycle.

The front outer surface 31a joins the lower outer surface of the fairing bottom portion 34 and defines an acceleration profile of the airflow over the front outer surface 31a and the lower outer surface of the fairing 21, creating a reduction in air pressure and driving Increases the grounding force of the motorcycle inside. In FIG. 9, this ground force is indicated by the symbol F1.

In an advantageous embodiment, the rear inner surface 31b of the aerodynamic profile formed by the cover 31 extends downwardly from the leading edge 31c and slopes rearwardly towards the radiator 19. In other words, in the side view, the profile defined by the rear inner surface 31b along the center plane of the motorcycle 1 corresponds to the lower part of the cover 31, that is, the fairing 21 extending from the front edge 31c to the lower part of the engine 7. Towards the bottom part 34 of the radiator the distance from the radiator decreases. When the motorcycle 1 moves forward, the airflow flowing into the fairing internal volume behind the rear inner surface 31b is decelerated along the inner surface 31b, resulting in an increase in pressure, which contributes to the ground contact force F1.

The function of the cover 31 described above is particularly illustrated in FIG. While the motorcycle 1 is moving forward, an airflow F is generated between the front steering wheel 9 and the front upper part of the fairing 21, and this airflow F can flow both above and below the front mudguard 35. , has a downwardly directed component. The upper part of the fluid stream forming the air stream F directly impinges on the radiator 19 with a high velocity component perpendicular to the front face of the radiator 19 so as to pass through the radiator 19 . The lower part of the fluid stream forming air stream F has a high vertical velocity component directed downwards. The downwardly directed portion of the flow collides with the leading edge 31c and is divided into a front partial flow FA and a rear partial flow FB.

In the side view, the front partial flow FA covers the front outer surface 31a of the cover 31 and is divided between the bottom part 34 of the fairing 31 and the ground (arrow FC, FIG. 4) and is defined by the front outer surface 31a and the generates a downwardly directed force as a result of acceleration along the ogival portion.

The rear partial flow FB covers the rear inner surface 31b of the cover 31, passes through a flow path defined between the rear inner surface 31b and the front surface of the radiator 19, and is directed below the rear partial flow FB. Covering the front side of the radiator 19 as a result of the velocity component. The rear partial flow FB is decelerated with the resulting increase in pressure and gradually flows through the radiator 19.

The aerodynamic profile of the front outer surface 31a and the rear inner surface 31b limits the risk of fluid flow separation along the surfaces and thus improves the hydrodynamic behavior.

The deceleration of the partial flow FB in the flow pocket, ie the flow path, formed between the front surface of the radiator 19 and the rear inner surface 31b of the cover 31 pushes the air through the radiator 19. Therefore, the partial flow FB contributes efficiently to the removal of heat from the radiator 19.

In this way, the air flow F generated between the front steering wheel 9 and the upper part of the fairing 21 is optimally utilized for cooling the fluid coolant of the engine 7. Furthermore, the cover 31 protects the interior of the fairing 21 from the intrusion of debris and sharp objects such as stones that could damage mechanical components such as the radiator. The inflow of hot air pumped up from the ground by the front steering wheels 9 when the ambient temperature is very high is also reduced, resulting in an improved cooling situation for the engine 7.

In the embodiment shown in the accompanying drawings, in particular in FIGS. 1, 7, 8 and 9, the rear fork 17 comprises two support arms 51 of the rear drive wheel 13. The two arms 51 are connected to each other by a joining structure 53 forming a block defining a hinge connecting the rear fork 17 to the frame of the motorcycle.

The joining structure 53 has a rear side surface 55 facing the rear drive wheel 13 . As shown in particular in FIGS. 7 and 9, in a side view, more precisely in a sectional view along the vertical mid-plane of the motorcycle 1, the rear side 55 has a lower part joined to the rear part 59 of the fairing 21. have The rear portion 59 of the fairing extends upwardly from the bottom portion 34 of the fairing 21 and faces the ground and the rear drive wheels 13.

In a practical embodiment, the rear side surface 55 has a portion that is substantially parallel to the outer circumferential surface of the rear drive wheel 13 in a side view, more precisely in a sectional view along the vertical center plane of the motorcycle 1. be able to. In some embodiments, as shown in FIG. A flow path may be defined that slightly converges in the direction of the airflow generated.

In a practical embodiment, in the vertical mid-plane of the motorcycle 1, the rear side 55 of the joining structure 53 has a contour, i.e. a curve, substantially tangent to the rear side 59 of the fairing 21 (FIGS. 7 and 9). ), and forms an air diffusion path together with the outer peripheral surface of the rear drive wheel 13.

In fact, on the vertical central plane of the motorcycle 1, the rear side part 59 of the fairing 21 and the rear side face 55 of the joining structure 53 are connected to each other in the transition area between the rear side part 59 and the rear side surface 55. The derivatives form a continuous curve.

In this way, the rear side 59 of the fairing 21 and the rear side 55 of the joining structure 53 define a guide profile for the airflow around the rear drive wheel 13.

In some embodiments, the joint structure 53 and the rear side 59 of the fairing 21 move, for example as a result of loading by the driver G or as a result of movements caused by ground roughness and/or dynamic effects. Despite the rocking movement of the rear fork 17 about the axis A, the continuity of the surface defining the diffusion path of the airflow around the rear drive wheel 13 can be maintained. For example, for this purpose, the two mutually abutting surfaces of the rear side 59 of the fairing 21 and the joining structure 53 can have regions that slidably connect to each other.

In the illustrated embodiment, the rear side 59 of the fairing 21 has an upper edge 61 (FIG. 6) facing the fork 17, which upper edge 61 is spaced apart from the fork 17. ing. Furthermore, a notch 63 facing the rear fork 17 is provided in the upper edge portion 61 . A deflector 65 having a shape complementary to the notch 63 is provided integrally with the rear fork 17. In the angular position of the rear fork 17, the deflector 65 is substantially flush with the inside of the notch 63, forming a substantially continuous surface. When the rear fork 17 rotates upward about the axis A relative to the above-mentioned position, the deflector 65 moves away from the rear side 59 of the fairing 21 and opens a gap 70 in the rear side 59 of the fairing. The deflector 65 is located in front of the gap. This creates a guide profile for the airflow exiting from the inside of the fairing 21 through the gap defined by the notch 63, which airflow connects the outer peripheral surface of the rear drive wheel 13 and the joining structure 53. It is forced to pass through a passage defined between the rear side surface 55 and the rear side surface 55.

In this way, airflow guidance is obtained around the rear side of the fairing 21 between the rear side surface 55 of the joining structure 53 of the fork 17 and the rear drive wheel 13, and the flow conditions are improved. vorticity phenomena, which cause an increase in the rolling resistance of the motorcycle, are reduced and, as a result of the airflow guided into the flow path, the cooling of the rear drive wheel 13 is optimized.

As the air flow around the rear side 59 of the fairing 21 is accelerated toward the rear side 55 of the joint structure 53, an aerodynamic effect accompanied by a downward force is also generated, which increases the grounding force of the motorcycle 1. increases (arrow F2 in FIG. 9).

The use of an upside-down airfoil 67 that is integral with the rear fork 17 and placed below the plane in which the rotational axis of the rear drive wheel 13 and the hinge axis A of the rear fork 17 lie, further increases the ground contact force. I can do it. The airfoil 67 is upside down in the sense that the high pressure side along which the airflow decelerates faces upwardly, and the low pressure side along which the airflow accelerates faces downwardly. The front edge of the airfoil 67 faces forward, and the rear edge faces toward the rear drive wheel 13, and the front edge of the airfoil 67 faces the rear drive wheel 13 in the forward direction of the motorcycle 1 (arrow FF). Located in front of 13.

In a particularly advantageous embodiment, a rear mudguard 69 having a rear side surface 71 facing the rear drive wheel 13 can be fixed to the rear fork 17 . In a side view, in particular a cross-sectional view along the vertical mid-plane of the motorcycle 1, the rear side 71 of the rear mudguard 69 is substantially relative to the rear side 55 of the joint structure 53, as can be seen in particular in FIG. can come into contact with. Substantially, the rear side 71 of the rear mudguard 69 follows a contour that forms an extension of the contour defined by the intersection of the rear side 55 and the rear side 59 of the fairing 21 with a vertical midplane. intersects the vertical midplane of 1.

This allows for a part of the extension of the flow path, under the seat of the motorcycle 1, along which the air flow FE is guided, to reach the upper region of the rear wheel drive wheels 1. A flow path is defined that extends around the annulus 13. This flow path efficiently guides the airflow FE generated by the forward motion of the motorcycle 1, reduces air resistance, and effectively cools the rear drive wheels.

FIG. 10 is a diagram similar to FIG. 7 of an improved embodiment. In particular, this embodiment provides a solution aimed at optimizing the effect of the airflow generated by the structure of the rear fork 17, in particular the combination of the rear side 55 and the rear side 59 of the fairing 21. be done.

As seen in FIG. 10, a shield 100 extending around the outer circumferential surface of the tire of the rear drive wheel 13 is arranged between the two arms 51 of the fork 17. As can be seen in FIG. 10, the shield 100 can be in the form of a wall having a three-dimensional curvature that substantially corresponds to the curvature of the tire of the rear drive wheel 13, with a constant distance from the tread of the tire. placed at a distance. In practice, the surface of the shield 100 facing the rear drive wheel 13 may form an encirclement of the rear drive wheel 13, preferably at a constant distance from the rear drive wheel 13.

Shield 100 has an upper portion 100a and a lower portion 100b. In the illustrated embodiment, upper portion 100a has an angular extension equal to angle α and lower portion 100b has an angular extension equal to angle β. In some embodiments, the angular extension of the two portions 100a and 100b, and thus the total angular extension of the shield 100, may be fixed. For purposes that will become clear below, a set of shields with different angular extensions can be provided in order to adapt the motorcycle 1 to different riding conditions. In other embodiments, the two parts 100a and 100b can be made movable, one relative to the other, to increase or decrease the extent of their overlap and thus change their total angular extension. This variation can be controlled manually, for example, by allowing the two parts 100a and 100b to be fixed in variable angular positions, one relative to the other. In another more sophisticated embodiment, the angular extension of the shield 100 can be changed using a servo-assisted system, optionally by control means accessible to the driver G while driving. Electric, pneumatic or hydraulic actuators can be provided for this purpose. It is also possible to control the extension and contraction of the shield 100 by mechanical control with an operating member located on the handlebar or accessible to the driver while driving.

The function of the shield 100 is to shield the tire of the rear drive wheel 13 more or less depending on its angular extension (a+P). In this way, the temperature of the tires can be regulated by more or less shielding the tires of the rear drive wheels 13, i.e. by the rear side 59 of the fairing 21 and the rear side 55 of the rear fork 17. As a result of the airflow conveyed in the channel formed, a more or less cooling effect on the tire can be provided.

The angular extension (a+P) of the shield 100 can be varied (manually or servo-assisted) depending on driving conditions, type of tires installed, ambient temperature, type of road surface, etc. In the case of servo-assisted operation, it is also possible to automate the control of the angular extension of the shield 100 based on a temperature signal generated by a temperature sensor that detects the surface temperature of the rear wheel.

Furthermore, in the case of rain, the shield 100 prevents rainwater flowing between the rear fork rear surface 59 and the rear drive wheel 13 from flooding the rear drive wheel 13 during driving. This maximizes grip in bad weather.

Claims (16)

Frame (3) and
an internal combustion engine (7) provided in the frame;
at least one front steering wheel (9);
a rear drive wheel (13);
A front fairing (21) that at least partially covers the frame (3), the motorcycle comprising:
- A windshield (22) that covers the front steering wheel (9);
a right-hand part (21B) and a left-hand part ( 21A) and
- a bottom part (34) facing the ground, interconnecting the left part (21A) with the right part (21B) and extending below the engine (7);
- Includes a front part that descends downward from the windshield (22), is joined to the left part (21A) and right part (21B) at the side, and is joined to the bottom (34) of the fairing (21) at the bottom. ,
Said front part comprises a front opening (23) adapted to allow air into the fairing (21) during running of the motorcycle (1), said front opening (23) forming an edge (25). ),
The front part has a cover (31) extending from an edge (25) surrounding the front opening (23) towards a bottom part (34) of the fairing (21), the cover (31) comprising: It has a front side surface (31a) facing the front steering wheel (9) and a rear side surface (31b) facing the engine (7),
The front side (31a) and the rear side (31b) widen with respect to each other from the edge (25) of the front opening (23) towards the bottom part (34) of the fairing (21), ) A motorcycle characterized in that it is adapted to form an aerodynamic profile with a leading edge (31c) along an edge (25) surrounding ). The cover (31) is joined to the right side part (21B) and the left part (21A) of the fairing (21) at the side surface, and is joined to the bottom part (34) of the fairing (21) at the bottom surface. The motorcycle according to claim 1, characterized in that: a front opening (23) extends downwardly from the upper end (25A) of the front opening to the leading edge (31c) of the aerodynamic profile;
The leading edge (31c) of the aerodynamic profile extends from the top end (25A) of the front opening (23) to the top end (25A) of the front opening (23) and the bottom part (34) of the fairing (21). The motorcycle according to claim 1 or 2, wherein the motorcycle is arranged at a distance (h) that is 20% or more of a distance (H) between the two. the leading edge (31c) of the aerodynamic profile from the top of the front opening is no more than 90% of the distance between the top of the front opening (23) and the bottom part (34) of the fairing (21); Motorcycle according to claim 3, characterized in that the distance is preferably 80% or less. Claim 1- characterized in that the front opening (23) is arranged at the top of the front part so as to be closer to the windshield (22) than the bottom part (34) of the fairing (21). 4. The motorcycle according to any one of 4. comprising at least one radiator (19) for cooling at least one liquid coolant of the engine (7);
the at least one radiator (19) has a front side facing forward in the forward direction of the motorcycle (1);
The at least one radiator (19) is arranged behind the front opening (23) so as to receive the air flow (F) passing through the front opening (23) when the motorcycle (1) is running. The motorcycle according to any one of claims 1 to 5, characterized in that: Motorcycle according to claim 6, characterized in that the at least one radiator (19) is arranged at least partially behind the cover (31) with respect to the forward direction of the motorcycle (1). . The rear inner surface (31b) of the cover (31) is joined to the at least one radiator (19) in a direction substantially perpendicular to the front side of the at least one radiator (19). The motorcycle according to claim 6 or 7, characterized in that: Claims 1 to 3, characterized in that the front outer surface (31a) of the cover (31) is at least partially convex and extends forward with respect to the leading edge (31c) of the aerodynamic profile. 8. The motorcycle according to any one of 8. that the rear inner surface (31b) of the cover (31) is at least partially concave and slopes rearwardly with respect to the leading edge (31c) of the aerodynamic profile towards the engine (7); The motorcycle according to any one of claims 1 to 9, characterized in that: The front outer surface (31a) and the rear inner surface (31b) of the cover (31) absorb airflow (F) generated by the forward movement of the motorcycle (1) and flowing around and over the front steering wheel (9). into a rear partial flow (FB) carried along the rear inner surface (31b) of the cover (31) and a front partial flow (FA) carried along the front outer surface (31a) of the cover (31). The motorcycle according to any one of claims 1 to 10, characterized in that the motorcycle is configured to be separated. The front outer surface (31a) of the cover (31) abuts and joins the bottom part (34) of the fairing (21), and during the forward movement of the motorcycle (1), the front partial flow (FA) 12. Motorcycle according to claim 11, characterized in that it is configured to accelerate along the outer surface (31a) and produce a reduction in pressure that increases the ground contact force of the motorcycle (1). a pocket is formed between the rear inner surface (31b) of the cover (31) and the at least one radiator (19);
The pocket is configured to collect and decelerate a rear partial flow (FB) generated while the motorcycle (1) is moving forward, thereby increasing the pressure that increases the grounding force of the motorcycle (1). The motorcycle according to claim 11 or 12. According to any one of claims 1 to 13, wherein the front outer surface (31a) of the cover (31) has an ogive shape with a convex portion facing forward in the traveling direction of the motorcycle (1). motorcycle. A motorcycle comprising a fairing (21) having a front portion facing a front steering wheel (9),
a forward opening (23) extending above the vertical extension of the forward portion of the fairing;
a cover (31) extending below the vertical extension of the forward portion of the fairing;
said cover (31) forming an aerodynamic profile with a front outer surface (31a) facing the front steering wheels (9) and a rear inner surface (31b) facing the engine (7);
the front outer surface and the rear inner surface diverge with respect to each other;
A motorcycle characterized in that the aerodynamic profile divides the downward airflow generated by the forward motion of the motorcycle into an outer partial flow (FA) and an inner partial flow (FB). Motorcycle according to claim 15, characterized in that it comprises one or more of the features according to claims 2 to 14.

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