ES2384729A1 - Aerodynamic diffuser for motorized vehicles. (Machine-translation by Google Translate, not legally binding) - Google Patents

Aerodynamic diffuser for motorized vehicles. (Machine-translation by Google Translate, not legally binding) Download PDF

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Publication number
ES2384729A1
ES2384729A1 ES201001181A ES201001181A ES2384729A1 ES 2384729 A1 ES2384729 A1 ES 2384729A1 ES 201001181 A ES201001181 A ES 201001181A ES 201001181 A ES201001181 A ES 201001181A ES 2384729 A1 ES2384729 A1 ES 2384729A1
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section
diffuser
vehicle
aerodynamic
sections
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Granted
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ES201001181A
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Spanish (es)
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ES2384729B1 (en
Inventor
Vicente HENRÍQUEZ CONCEPCIÓN
Cristina MARTÍN
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Universidad de las Palmas de Gran Canaria
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Universidad de las Palmas de Gran Canaria
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D35/00—Vehicle bodies characterised by streamlining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D37/00—Stabilising vehicle bodies without controlling suspension arrangements
    • B62D37/02—Stabilising vehicle bodies without controlling suspension arrangements by aerodynamic means

Abstract

Aerodynamic diffuser for motorized vehicles. The present invention relates to an aerodynamic diffuser for motor vehicles characterized in that it is constituted by a parallelepiped section, practiced in the upper part of the vehicle comprised from the end of the windshield (2) to the rear of the vehicle (3) ; and having a line (6) of slight transverse inflection, which divides the diffuser into two sections (4, 5) of variable curve section, in which an opening or air intake is made whose opening causes a certain elevation of the section or section (5) closest to the rear of the vehicle on the section or previous section (4), allowing to obtain an overpressure both in the area of intersection of the two sections of the diffuser and in the final section thereof. (Machine-translation by Google Translate, not legally binding)

Description

Difusor aerodinámico para vehículos motorizados Aerodynamic diffuser for motor vehicles

La presente solicitud de Patente de Invención consiste conforme indica su enunciado en un "Difusor aerodinámico para vehículos motorizados". The present invention patent application consists as indicated in a "Aerodynamic diffuser for motor vehicles".

La presente invención se refiere a un difusor situado en la zona superior de un vehículo automóvil con una geometría tal que incrementa la estabilidad a altas velocidades y mejora el flujo de aire al interior. The present invention relates to a diffuser located in the upper area of a motor vehicle with a geometry such that it increases stability at high speeds and improves the flow of air into the interior.

Antecedentes de la invención Background of the invention

Cuando un vehículo motorizado está en circulación se encuentra sometido a los efectos de las corrientes de aire que interaccionan con el mismo. La interacción de las corrientes de aire con el vehículo provocan la aparición de dos tipos de flujo de aire: (1) el flujo externo, debido al paso del aire por la superficie exterior de éste; y (2) el flujo interno debido al aire que circula a través de los elementos internos del automóvil (por ejemplo, el motor). En este sentido, las fuerzas aerodinámicas ejercidas sobre el vehículo incrementan exponencialmente con la velocidad afectando al consumo y a la estabilidad del vehículo. When a motor vehicle is in circulation, it is subject to the effects of air currents that interact with it. The interaction of the air currents with the vehicle causes the appearance of two types of air flow: (1) the external flow, due to the passage of the air through the exterior surface of the latter; and (2) the internal flow due to the air flowing through the internal elements of the car (for example, the engine). In this sense, the aerodynamic forces exerted on the vehicle increase exponentially with the speed affecting the consumption and stability of the vehicle.

De esta manera, el diseño aerodinámico de los vehículos es uno de los factores determinantes en la eficiencia y seguridad de los vehículos. Para lograr una mayor eficiencia y estabilidad del vehículo se hace necesario obtener una carga aerodinámica vertical o fuerza de sustentación negativa que permita al vehículo mantenerse adherido al suelo en todo momento. In this way, the aerodynamic design of the vehicles is one of the determining factors in the efficiency and safety of the vehicles. In order to achieve greater efficiency and stability of the vehicle, it is necessary to obtain a vertical aerodynamic load or negative bearing force that allows the vehicle to remain attached to the ground at all times.

Actualmente, la inestabilidad de los vehículos se encuentra asociada a la diferencia de cargas entre la parte delantera y trasera del vehículo, y la eficiencia a la reducción de la resistencia aerodinámica. En el estado de la técnica existen soluciones que actúan sobre los bajos del vehículo, lo que produce pérdidas en la toma del motor, o hacen referencia al empleo de elementos aerodinámicos (por ejemplo, alerones) en la zona superior trasera del vehículo, lo que produce un aumento de la resistencia aerodinámica. Por otra parte, en lo que se refiere a la refrigeración, la solución aerodinámica adoptada en vehículos consiste en abrir orificios de gran tamaño allí donde se alcanzan ciertas sobrepresiones "relativas", aún con campos de flujo caracterizados por altas velocidades, lo que induce a las pérdidas asociadas debido a esa velocidad. Currently, the instability of the vehicles is associated to the difference in loads between the front and rear of the vehicle, and the efficiency to reduce aerodynamic drag. In the state of the art there are solutions that act on the underside of the vehicle, which causes losses in the intake of the engine, or refer to the use of aerodynamic elements (for example, ailerons) in the upper rear area of the vehicle, which It produces an increase in aerodynamic drag. On the other hand, when it comes to cooling, the aerodynamic solution adopted in vehicles consists in opening large holes where certain "relative" overpressures are reached, even with flow fields characterized by high speeds, which induces the associated losses due to that speed.

Por ejemplo, el documento de patente WO 2007/017236 Al hace referencia a un dispositivo que comprende una placa de succión del aire, situada debajo de la carrocería, que permite aumentar la estabilidad del vehículo a altas velocidades. También el documento de patente GB 2269142 A hace referencia a una modificación en la disposición del suelo del vehículo que define una garganta tipo Venturi que queda comunicada con un difusor situado en la parte trasera del vehículo y que genera una carga aerodinámica que actúa a través del centro de presión del vehículo, a su vez se dispone de medios (perfil aerodinámico trasero regulable o ventilador eléctrico) para modificar la posición del centro de presión. Otra solución similar se describe en la patente US 6068328. For example, patent document WO 2007/017236 Al refers to a device comprising an air suction plate, located below the body, which allows to increase the stability of the vehicle at high speeds. Also patent document GB 2269142 A refers to a modification in the arrangement of the floor of the vehicle that defines a Venturi throat that is communicated with a diffuser located at the rear of the vehicle and that generates an aerodynamic load that acts through the Pressure center of the vehicle, in turn, means (adjustable rear aerodynamic profile or electric fan) are available to modify the position of the pressure center. Another similar solution is described in US 6068328.

Por otra parte, el documento de patente US 5544931 hace referencia a un estabilizador aerodinámico adaptado para ser montado en la parte trasera del techo del vehículo. Otra solución similar se describe en la patente WO 2005/102826 Al. El problema de estos elementos es que suponen un aumento de la resistencia aerodinámica, y por lo tanto, una pérdida de eficiencia. On the other hand, patent document US 5544931 refers to an aerodynamic stabilizer adapted to be mounted on the rear part of the roof of the vehicle. Another similar solution is described in WO 2005/102826 Al. The problem with these elements is that they represent an increase in aerodynamic drag, and therefore, a loss of efficiency.

El objeto de la presente invención propone un difusor situado en la zona superior del vehículo (desde el final del parabrisas hasta la parte trasera de automóvil) cuya geometría supone la mejora de los efectos aerodinámicos producidos por ambos tipos de flujo (externo e interno). Este difusor permite obtener una sobrepresión desde la zona media del vehículo hasta atrás, logrando estabilidad a velocidades elevadas, y disminuir la resistencia aerodinámica al poder prescindir de elementos aerodinámicos traseros (por ejemplo, alerones); así como una disminución de las pérdidas en la toma de aire del motor ya que dicha toma se encuentra en la zona de mayor sobrepresión generada por difusión, lo que implica una disminución de velocidad y un aumento de presión. The object of the present invention proposes a diffuser located in the upper area of the vehicle (from the end of the windshield to the rear of the car) whose geometry implies the improvement of the aerodynamic effects produced by both types of flow (external and internal). This diffuser allows to obtain an overpressure from the middle area of the vehicle to the rear, achieving stability at high speeds, and reducing aerodynamic resistance by being able to dispense with rear aerodynamic elements (for example, ailerons); as well as a decrease in losses in the air intake of the engine since said intake is in the area of greatest overpressure generated by diffusion, which implies a decrease in speed and an increase in pressure.

Sumario de la invención Summary of the invention

La presente invención se refiere a un difusor aerodinámico para vehículos motorizados caracterizado por el hecho de que está constituido por una sección paralepipédica, practicada en la parte superior del vehículo comprendida desde el final del parabrisas (2) hasta la parte trasera del vehículo (3); y que presenta una línea (6) de ligera inflexión transversal, que divide el difusor en dos tramos (4, 5) de sección curva variable, en la que se practica una abertura o toma de aire (9) cuya apertura provoca una cierta elevación del tramo o sección (5) más cercano a la parte trasera del vehículo sobre el tramo o sección anterior (4), permitiendo obtener una sobrepresión tanto en la zona de intersección de los dos tramos del difusor como en la sección final del mismo. The present invention relates to an aerodynamic diffuser for motor vehicles characterized by the fact that it is constituted by a parallelepiped section, practiced in the upper part of the vehicle comprised from the end of the windshield (2) to the rear of the vehicle (3) ; and which has a line (6) of slight transverse inflection, which divides the diffuser into two sections (4, 5) of variable curved section, in which an opening or air intake (9) is practiced whose opening causes a certain elevation of the section or section (5) closest to the rear of the vehicle on the previous section or section (4), allowing an overpressure to be obtained both in the intersection zone of the two sections of the diffuser and in the final section thereof.

Descripción de las figuras Description of the figures

La figura 1 muestra una vista en planta del difusor situado en la zona superior de la carrocería del vehículo. Figure 1 shows a plan view of the diffuser located in the upper area of the vehicle body.

La figura 2 muestra un detalle de la zona de intersección entre las dos secciones del difusor. Figure 2 shows a detail of the intersection zone between the two sections of the diffuser.

La figura 3 muestra una vista en corte o sección del vehículo sobre el que se ha integrado el difusor. Figure 3 shows a sectional view or section of the vehicle on which the diffuser has been integrated.

Descripción detallada de una realización preferida de la invención Detailed description of a preferred embodiment of the invention

Aunque la invención se describe en términos de una realización específica preferida, será fácilmente evidente para los expertos en esta técnica que se pueden hacer diversas modificaciones, redisposiciones y reemplazos. El alcance de la invención está definido por las reivindicaciones adjuntas a la misma. Although the invention is described in terms of a specific preferred embodiment, it will be readily apparent to those skilled in this art that various modifications, redispositions and replacements can be made. The scope of the invention is defined by the claims appended thereto.

La realización preferida de la invención describe un difusor, integrado en el diseño de la carrocería de un vehículo motorizado, situado en la zona superior de la carrocería que sustituye los siguientes elementos estructurales del vehículo: parte del techo, la luna trasera y parte de la zona trasera de la carrocería. The preferred embodiment of the invention describes a diffuser, integrated in the design of the body of a motor vehicle, located in the upper area of the body that replaces the following structural elements of the vehicle: part of the roof, the rear moon and part of the rear area of the body.

En esta realización preferida, tal y como se muestra en a figura 1, el difusor (1) se extiende desde la zona donde finaliza el parabrisas (2) hasta la parte trasera del vehículo (3). El difusor se encuentra dividido en dos secciones (4 Y 5) diferenciadas por su geometría, por su altura y por su inclinación. En la zona de intersección de ambas secciones (6) se produce un cambio de plano, elevándose la segunda sección del difusor (5) sobre la primera (4), cuando se abre la toma de aire (9). In this preferred embodiment, as shown in Figure 1, the diffuser (1) extends from the area where the windshield (2) ends to the rear of the vehicle (3). The diffuser is divided into two sections (4 and 5) differentiated by its geometry, its height and its inclination. In the intersection zone of both sections (6) there is a change of plane, the second section of the diffuser (5) rising above the first (4), when the air intake (9) is opened.

Atendiendo a las figuras 2 y 3, podemos observar como la primera sección del difusor (4) se extiende desde la zona donde finaliza el parabrisas (2) hasta la zona de intersección (6). Esta primera sección del difusor (4) consiste en un plano ligeramente inclinado hacia abajo Based on figures 2 and 3, we can see how the first section of the diffuser (4) extends from the area where the windshield (2) ends to the intersection zone (6). This first section of the diffuser (4) consists of a plane slightly inclined downwards

(7) hasta la intersección entre las dos secciones del difusor (6). Este plano (7) presenta una zona (8), tal y como se observa en la figura 3, donde se produce un ligero cambio de inclinación. En esta zona (8), se produce una disminución de la velocidad, y por 10 tanto un aumento de la presión sobre el vehículo, y una cantidad de flujo másico de aire que permite cubrir la demanda de cualquier planta motriz instalada en el vehículo. Por lo tanto, y debido a que en esta zona (8) se producen las menores pérdidas, es aquí donde se coloca una toma de aire (9) para canalizar el flujo al interior del vehículo. Al abrir la toma de aire (9), se produce un cambio de plano a una altura superior, actuando la segunda sección del (7) to the intersection between the two sections of the diffuser (6). This plane (7) has a zone (8), as shown in Figure 3, where there is a slight change in inclination. In this area (8), there is a decrease in speed, and therefore an increase in pressure on the vehicle, and an amount of mass air flow that allows to meet the demand of any driving plant installed in the vehicle. Therefore, and because in this area (8) the smallest losses occur, it is here that an air intake (9) is placed to channel the flow into the vehicle. When opening the air intake (9), there is a change of plane at a higher height, acting the second section of the

difusor (5). diffuser (5).

La segunda sección del difusor (5) se extiende desde la zona de intersección (6) hasta la parte trasera del vehículo (3). Esta segunda sección del difusor (5) consiste en un plano 5 ligeramente inclinado hacia abajo (lO) que poco a poco va perdiendo dicha inclinación (11) hasta la zona final donde se aprecia una discreta inclinación hacia arriba (12). The second section of the diffuser (5) extends from the intersection zone (6) to the rear of the vehicle (3). This second section of the diffuser (5) consists of a plane 5 slightly inclined downwards (10) that gradually loses said inclination (11) to the final area where a discrete upward inclination (12) is appreciated.

La geometría de esta segunda sección del difusor (5) permite que se genere sobre esta zona una sobrepresión (carga aerodinámica o sustentación negativa) que se ve acentuada aún más en la sección final (12), proporcionando mayor estabilidad a altas velocidades The geometry of this second section of the diffuser (5) allows an overpressure (aerodynamic load or negative lift) to be generated on this area that is further accentuated in the final section (12), providing greater stability at high speeds

10 pudiendo prescindir así de elementos aerodinámicos (spoilers o alerones) que pueden provocar un aumento en la resistencia. 10 thus being able to dispense with aerodynamic elements (spoilers or spoilers) that can cause an increase in resistance.

Claims (1)

REIVINDICACIONES 1.-Difusor aerodinámico para vehículos motorizados caracterizado por el hecho de que está 1.-Aerodynamic diffuser for motor vehicles characterized by the fact that it is constituido por una sección paralepipédica, practicada en la parte superior del vehículo constituted by a parallelepiped section, practiced in the upper part of the vehicle 5 comprendida desde el final del parabrisas (2) hasta la parte trasera del vehículo (3); y que presenta una línea (6) de ligera inflexión transversal, que divide el difusor en dos tramos (4, 5) de sección curva variable, en la que se practica una abertura o toma de aire (9) cuya apertura provoca una cierta elevación del tramo o sección (5) más cercano a la parte trasera del vehículo sobre el tramo o sección anterior (4), permitiendo obtener una sobrepresión tanto en 5 from the end of the windshield (2) to the rear of the vehicle (3); and which has a line (6) of slight transverse inflection, which divides the diffuser into two sections (4, 5) of variable curved section, in which an opening or air intake (9) is practiced whose opening causes a certain elevation of the section or section (5) closest to the rear of the vehicle on the previous section or section (4), allowing to obtain an overpressure both in 10 la zona de intersección de los dos tramos del difusor como en la sección final del mismo. 10 the intersection zone of the two sections of the diffuser as in the final section thereof.
ES201001181A 2010-09-02 2010-09-02 AERODYNAMIC DIFFUSER FOR MOTORIZED VEHICLES. Active ES2384729B1 (en)

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ES201001181A ES2384729B1 (en) 2010-09-02 2010-09-02 AERODYNAMIC DIFFUSER FOR MOTORIZED VEHICLES.

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ES201001181A ES2384729B1 (en) 2010-09-02 2010-09-02 AERODYNAMIC DIFFUSER FOR MOTORIZED VEHICLES.

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ES2384729B1 ES2384729B1 (en) 2013-06-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11447192B2 (en) 2021-01-12 2022-09-20 Honda Motor Co., Ltd. Diffuser for a vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2361924A (en) * 1943-04-20 1944-11-07 Boynton Alexander Atmospheric resistance equalizing means for moving vehicles
DE760115C (en) * 1941-07-08 1953-02-16 Fahrzeug Motoren An Der Techn Device for improving the effect of guide surfaces that are upright on a vehicle roof surface
US3328074A (en) * 1965-09-20 1967-06-27 Walter J Van Rossem Top construction for convertible automobiles
ES2323438T3 (en) * 2006-06-22 2009-07-15 Compagnie Plastic Omnium AERODYNAMIC DEVICE FOR AUTOMOBILE VEHICLE.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE760115C (en) * 1941-07-08 1953-02-16 Fahrzeug Motoren An Der Techn Device for improving the effect of guide surfaces that are upright on a vehicle roof surface
US2361924A (en) * 1943-04-20 1944-11-07 Boynton Alexander Atmospheric resistance equalizing means for moving vehicles
US3328074A (en) * 1965-09-20 1967-06-27 Walter J Van Rossem Top construction for convertible automobiles
ES2323438T3 (en) * 2006-06-22 2009-07-15 Compagnie Plastic Omnium AERODYNAMIC DEVICE FOR AUTOMOBILE VEHICLE.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11447192B2 (en) 2021-01-12 2022-09-20 Honda Motor Co., Ltd. Diffuser for a vehicle

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