KR-102962475-B1 - Bypass Flow Path type Active Air Flap and Vehicle thereof

KR102962475B1KR 102962475 B1KR102962475 B1KR 102962475B1KR-102962475-B1

Abstract

The bypass flow type active air flap (10) applied to the vehicle (1) of the present invention allows the stagnant flow of driving air blocked by the closing of the air flap (30), which is opened and closed by the driving of the actuator (20), to pass through any one of the air curtain (7), hood (7), and under cover (9) by the bypass flow device (40). Alternatively, by forming a bypass flow path in the surrounding space of the stagnant flow in a combination of two or more, the driving wind pressure applied to the air flap (30) is reduced, thereby further enhancing the aerodynamic improvement effect while maintaining the excellent sealing performance of the air flap (30), and in particular, by forming a bypass flow path to various parts of the vehicle (1), the side effect (SIDE-EFFECT) caused by the improvement in the sealing performance of the air flap (30) is resolved.

Inventors

김운태
신준식

Assignees

현대자동차주식회사
기아 주식회사

Dates

Publication Date: 20260513
Application Date: 20210826

Claims (19)

In an active air flap that opens and closes by an actuator, A bypass flow path device is included to guide the stagnant flow of the driving air blocked by the closure of the air flap into the surrounding space of the air flap, thereby reducing the driving air pressure applied to the air flap. The above bypass flow path device is composed of a pressure flap valve that opens and closes according to the magnitude of the driving wind pressure caused by the stagnant flow, and a bypass duct that forms a bypass flow path in the surrounding space. The above pressure flap valve includes a fixed part, and The active air flap is characterized by the above-mentioned fixed portion comprising a projection formed on the valve frame of the pressure flap valve and a seating surface formed at the duct inlet of the bypass duct into which the projection is fitted.
In claim 1, the bypass flow path device An active air flap characterized by guiding to the surrounding space using one or a combination of a lateral bypass flow path device formed on the side of the air flap, an upward bypass flow path device formed on the upper side, and a downward bypass flow path device formed on the lower side.
In claim 2, the side-type bypass flow path device It includes a flap side frame that forms the side of the air flap and where the stagnant flow remains, The pressure flap valve is located on the flap side frame, and The above bypass duct is coupled with the pressure flap valve and forms the bypass flow path in the surrounding space when the door of the pressure flap valve is opened. Active air flap characterized by
In claim 3, the pressure flap valve The valve frame coupled to the above bypass duct, and A hinged door that blocks the opening of the door by the reaction force of the elastic part until the above driving wind pressure reaches a certain level or higher. An active air flap characterized by being composed of
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An active air flap according to claim 3, characterized in that the bypass duct leads to an air curtain formed on the side of the vehicle.
In claim 3, the side-type bypass flow path device includes an air guide to which the pressure flap valve is coupled, and An active air flap characterized in that the air guide is formed at a right angle to the side of the flap side frame.
In claim 2, the upward bypass flow path device It includes a flap upper frame that forms the upper part of the air flap and where the stagnant flow remains, and The above pressure flap valve is located on the upper frame of the flap, and An active air flap characterized in that the bypass duct is coupled with the pressure flap valve and forms the bypass flow path in the surrounding space when the door of the pressure flap valve is opened.
In claim 8, the pressure flap valve The valve frame coupled to the above bypass duct, and A hinged door that blocks the opening of the door by the reaction force of the elastic part until the above driving wind pressure reaches a certain level or higher. An active air flap characterized by being composed of
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An active air flap according to claim 8, characterized in that the bypass duct leads to a hood connecting port formed in the hood of a vehicle.
In claim 2, the downward bypass flow path device It includes a flap lower frame that forms the lower part of the air flap and where the stagnant flow remains, and The above pressure flap valve is located on the flap lower frame, and An active air flap characterized in that the bypass duct is coupled with the pressure flap valve and forms the bypass flow path in the surrounding space when the door of the pressure flap valve is opened.
In claim 12, the pressure flap valve The valve frame coupled to the above bypass duct, and A hinged door that blocks the opening of the door by the reaction force of the elastic part until the above driving wind pressure reaches a certain level or higher. An active air flap characterized by being composed of
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An active air flap according to claim 12, characterized in that the bypass duct leads to an under cover formed on the lower part of the vehicle.
An active air flap that reduces the driving wind pressure applied to the air flap by forming a bypass flow path in the surrounding space of the stagnant flow to any one of an air curtain, hood, and under cover by means of a bypass flow path device, thereby blocking the stagnant flow of driving wind that is opened and closed by the actuation of an actuator; and An AAF (Active Air Flap) controller is included that controls the opening and closing operation of the air flap by driving the actuator based on vehicle speed, and The above bypass flow path device is composed of a pressure flap valve that opens and closes according to the magnitude of the driving wind pressure caused by the stagnant flow, and a bypass duct that forms a bypass flow path in the surrounding space. The above pressure flap valve includes a fixed part, and A vehicle characterized in that the above-mentioned fixed part comprises a projection formed on the valve frame of the pressure flap valve and a seating surface formed on the duct inlet of the bypass duct into which the projection is fitted.
In claim 16, the bypass flow path formed by the bypass flow path device and the air curtain is A vehicle characterized by being formed with a bypass duct connected to a pressure flap valve that opens due to the driving wind pressure caused by the stagnant flow in the flap side frame of the air flap.
In claim 16, the bypass flow path formed by the bypass flow path device and the hood is A vehicle characterized by being formed with a bypass duct connected to a pressure flap valve that opens by the driving wind pressure caused by the stagnant flow in the upper frame of the flap of the above air flap.
In claim 16, the bypass flow path formed by the bypass flow path device and the under cover is A vehicle characterized by being formed with a bypass duct connected to a pressure flap valve that opens due to the driving wind pressure caused by the stagnant flow in the flap lower frame of the air flap above.

Description

Bypass Flow Path type Active Air Flap and Vehicle thereof The present invention relates to an active air flap, and more particularly to a vehicle equipped with an active air flap that resolves the side effect (SIDE-EFFECT) of improved sealing performance of the air flap, namely the purification flow in the high-pressure region, through a bypass path. Generally, vehicles are equipped with aerodynamic structures to improve fuel efficiency. Examples of such aerodynamic improvement structures include a streamlined exterior design that minimizes air resistance while driving and flow control technology within the engine compartment. In particular, the aforementioned flow control technology is implemented using an Active Air Flap (hereinafter AAF) applied to the front bumper grille to allow air to pass through easily for engine compartment cooling. In this case, although the structure and components of the Active Air Flap do not differ significantly, they are classified as either internal or external types depending on their application location on the grille. For example, the above AAF is composed of an air flap that acts as a valve to open or close an opening (i.e., a hole) connected to the grille according to set conditions, and an actuator that moves the air flap by being driven by the control of a controller. This prevents air from entering the engine compartment by blocking the opening of the grille except when engine cooling is required, and thus has the advantage of improving the worsening of air resistance as the amount of air entering the engine compartment increases. Furthermore, the above-mentioned AAF increases the torque of the actuator so that the air flap does not open even in high-speed wind (i.e., driving wind), and minimizes the gap between multiple air flaps acting inside a duct-shaped case by applying a structural application that improves sealing performance, thereby further enhancing the improvement of AAF performance by securing the sealing performance of these air flaps. FIG. 1 is an example in which an active air flap according to the present invention applies a bypass path to an air curtain of a vehicle, FIG. 2 is a configuration diagram of a pressure flap valve according to the present invention, FIG. 3 is a state in which the bypass path device is not operated when the flap of the active air flap is open during vehicle driving according to the present invention, FIG. 4 is a state in which the bypass path device is operated when the flap of the active air flap is closed during vehicle driving according to the present invention, FIG. 5 is an example in which an active air flap according to the present invention applies a bypass path to the hood of a vehicle, FIG. 6 is an example in which an active air flap according to the present invention applies a bypass path to the under cover of a vehicle. Embodiments of the present invention will be described in detail below with reference to the attached illustrative drawings. Since these embodiments are merely examples and can be implemented in various different forms by those skilled in the art to which the present invention pertains, the embodiments described herein are not limited to the examples described herein. Referring to FIG. 1, the vehicle (1) includes an active air flap (10) and an AAF controller (100). For example, the above active air flap (10) is located in the grille (5) that introduces driving air into the engine room from the bumper (3) of the vehicle (1), and is connected to the air curtain (7) formed on the left and right sides of the bumper (3) to direct driving air toward the side of the vehicle. Therefore, the above active air flap (10) is characterized as a bypass flow type active air flap by diverting the purified flow of the high-pressure region, which is generated by the driving wind that collides with the closed air flap (30), to the bypass flow device (40). Specifically, the active air flap (10) is composed of an actuator (20), an air flap (30), and a bypass flow path device (40). For example, the actuator (20) is driven by an output signal of the AAF controller (100) using a motor as a power source, and the air flap (30) closes the grille (5). By driving the actuator (20), it rotates (i.e., performs angular motion) to open the flap opening (30a) (see FIG. 3), thereby forming a passage for the air to flow in. Therefore, the actuator (20) and the air flap (30) are identical to the conventional components that constitute the active air flap (10). For example, the above bypass Euro device (40) is composed of a pressure flap valve (50) and a bypass duct (60). In particular, the pressure flap valve (50) is formed in a rectangular structure (or a square structure) and acts to allow the stagnant flow (i.e., driving wind) to flow toward the bypass duct (60) by opening the high-pressure region of the stagnant flow (i.e., driving wind) that strikes the air flap (30) with a pressure greater than a certain amount applied from the