Air guidance system, motor vehicle front section and motor vehicle

Abstract

Air guidance device configured for cooling air flowing through a heat exchanger arrangement (20), comprising at least one air guide device (8;28;38), wherein the air guide device (8;28;38) has at least one leakage opening (10) through which a targeted leakage airflow (13) is diverted from the cooling airflow in such a way that adjacent airflows (12) are drawn into an area of ​​the heat exchanger arrangement (20) that is otherwise not or only insufficiently permeated, characterized in that the air guide device (8;28;38) originates from at least one air inlet opening (6) and has a curved profile, wherein the area of ​​the heat exchanger arrangement (20) that is otherwise not or only insufficiently permeated is arranged offset from the air inlet opening (6), and wherein the area of ​​the heat exchanger arrangement (20) that is otherwise not or only insufficiently permeated is arranged below the air inlet opening (6).

Description

[0001] The invention relates to an air guiding device according to the preamble of patent claim 1. The invention further relates to a motor vehicle front part and a motor vehicle.

[0002] German patent DE 610 142 A discloses a housing at the front end of a motor vehicle with a discharge opening and covered openings that direct air from the front opening to the side panels of a radiator by means of a lateral suction draft. German patent application DE 10 2006 045 201 A1 discloses a front-end structure for vehicles with heat exchangers that are provided with an upper duct, a lower duct, and side ducts on their vehicle tops, floor sides, and the left and right sides. The floor duct is provided with a plurality of first through holes that run in the up-down direction of the vehicle. Air can be introduced from the vehicle floor side to the front end sides of the heat exchangers through second through holes.German patent application DE 10 2008 056 065 A1 discloses a support for a front module, such as a front part assembly of a vehicle, wherein a subframe is formed which extends horizontally transversely through an opening of a quadrangular main frame, wherein a radiator is to be arranged below the subframe, and projecting air guiding devices are arranged on the main frame and on the subframe.German patent application DE 36 00 190 A1 discloses a cooling device for the drive engine of a motor vehicle, comprising an engine radiator, a fan associated therewith, and a permanently open inlet opening for the cooling air, which can be closed by means of an automatically operated flap, in a body region located in front of the engine radiator and fan. The permanently open inlet opening is designed to ensure sufficient cooling air supply at high driving speeds, the fan switches on at low driving speeds under high load, and the flap is arranged such that it is moved into its open position by the suction of the cooling air present during fan operation. French patent application FR 2 930 199 A1 discloses an arrangement of at least one first and one second heat exchanger, each having a first and a second end face.

[0003] The object of the invention is to improve an air guiding device according to the preamble of claim 1 in such a way that the heat exchanger arrangement is more evenly flowed through with cooling air.

[0004] The problem is solved by an air guiding device having the features of patent claim 1. Unlike with known air guiding devices, no air is supplied through the leakage opening, but rather cooling air is specifically discharged in order to improve the flow onto or through the heat exchanger arrangement. The leakage opening is dimensioned such that the discharged leakage amount of cooling air is relatively small compared to the overall cooling air flow. The heat exchanger arrangement preferably comprises at least one cooler and / or one condenser. The air guiding device is curved such that the entire surface of the heat exchanger arrangement through which the cooling air flows is evenly supplied with cooling air. Due to the offset arrangement, it can happen with conventional air guiding devices that the heat exchanger arrangement is not supplied with any air or is only insufficiently supplied with air.This is improved by the leakage opening according to the invention. The term "below" refers to a motor vehicle equipped with the air guidance device according to the invention.

[0005] A preferred embodiment of the air guiding device is characterized in that the leakage opening is arranged in a convexly curved section of the air guiding device relative to the cooling air flow. The air guiding device preferably extends from the air inlet opening to an outer edge of the heat exchanger arrangement.

[0006] A further preferred embodiment of the air guiding device is characterized in that a first air guiding element upstream of the leakage opening is oriented differently than a second air guiding element downstream of the leakage opening. Viewed in longitudinal section, the free ends of the air guiding elements delimit the leakage opening.

[0007] A further preferred embodiment of the air guiding device is characterized in that a free end of the second air guiding element is arranged closer to the heat exchanger arrangement than a free end of the first air guiding element. This ensures that the leakage air flow is guided, so to speak, behind or below the second air guiding element.

[0008] A further preferred embodiment of the air guiding device is characterized in that a free end of the first air guiding element is arranged above a free end of the second air guiding element. The term "above" refers to a motor vehicle equipped with the air guiding device according to the invention.

[0009] The invention further relates to a motor vehicle front part or motor vehicle front part with an air guiding device as described above.

[0010] The invention further relates to a motor vehicle with a previously described air guiding device, in particular with a previously described motor vehicle front part or motor vehicle front part.

[0011] Further advantages, features, and details of the invention will become apparent from the following description, in which various embodiments are described in detail with reference to the drawings. They show: Fig. 1 a simplified representation of a motor vehicle front part in longitudinal section with an air guiding device according to the invention and the Fig. 2 and Fig. 3 two variants of the Fig. 1 illustrated embodiment.

[0012] In the Fig. 1 to 3 show a simplified longitudinal section of a motor vehicle front end 1 according to the invention, according to three different embodiments. The motor vehicle front end 1 comprises two body parts 2, 3 at the front end of a motor vehicle. An air guide device 4 preferably comprises a plurality of air inlet openings 6 at the front end of the motor vehicle.

[0013] An air guide device 8 extends from the air inlet opening 6 to a package 20, which comprises a heat exchanger arrangement with a cooler and a condenser. During operation of the motor vehicle, a cooling air flow is generated via the air guide device 8, which flows against and through the package 20.

[0014] Within the scope of the present invention, it was found that in a lower region in front of the package 20, separations and turbulences of the cooling air flow can lead to insufficient flow onto or through the lower region of the heat exchanger arrangement 20.

[0015] In Fig. In Figure 1, an arrow 11 indicates an air flow in a conventional air guiding device 8. According to an essential aspect of the invention, a leakage air flow, indicated by an arrow 13, is specifically discharged through a leakage opening 10 of the air guiding device 8.

[0016] Leakage airflow 13 creates a suction that causes the cooling air flow to be drawn downward, as indicated by arrow 12. Arrow 12 indicates an airflow that flows toward the bottom of the stack 20. Leakage airflow 13 draws the adjacent airflows 12 downward.

[0017] In the Fig. 2 and Fig. 3, the air guiding device 4 comprises an air guiding device 28; 38 each with two air guiding elements 31, 32; 41, 42. The air guiding elements 31, 32; 41, 42 shown in longitudinal section limit, as in the case of the Fig. 1 illustrated embodiment, the leakage opening 10, but are aligned differently relative to each other.

[0018] In the Fig. 2, the free end of the air guiding device 31 is arranged further away from the heat exchanger arrangement package 20 than the free end of the air guiding element 32. This results in a leakage air flow branched off through the leakage opening 10 being guided behind or below the air guiding element 32.

[0019] In the Fig. In the embodiment shown in Figure 3, the free end of the air guide element 41 is arranged above the free end of the air guide element 42. This ensures that less cooling air is diverted from the cooling air flow via the leakage opening 10.

Claims

[1] Air guiding device configured for cooling air flowing through a heat exchanger arrangement (20), comprising at least one air guiding device (8; 28; 38), wherein the air guiding device (8; 28; 38) has at least one leakage opening (10) through which a targeted leakage air flow (13) is branched off from the cooling air flow in such a way that adjacent air flows (12) are sucked into an area of the heat exchanger arrangement (20) through which air flow is otherwise not or only insufficiently flowed through, characterized by in that the air guiding device (8; 28; 38) extends from at least one air inlet opening (6) and has a curved course, wherein the area of the heat exchanger arrangement (20) through which air is otherwise not flowed or only insufficiently flowed is arranged offset from the air inlet opening (6), wherein the area of the heat exchanger arrangement (20) through which air is otherwise not flowed or only insufficiently flowed is arranged below the air inlet opening (6). [2] Air guiding device according to claim 1, characterized by that the leakage opening (10) is arranged in a convexly curved section of the air guiding device (8;28;38) with respect to the cooling air flow. [3] Air guiding device according to one of the preceding claims, characterized by that a first air guide element (31; 41) upstream of the leakage opening (10) is oriented differently than a second air guide element (32; 42) downstream of the leakage opening (10). [4] Air guiding device according to claim 3, characterized by that a free end of the second air guide element (32) is arranged closer to the heat exchanger arrangement (20) than a free end of the first air guide element (31). [5] Air guiding device according to claim 3, characterized by that a free end of the first air guide element (41) is arranged above a free end of the second air guide element (42). [6] Motor vehicle front part with an air guiding device (4) according to one of the preceding claims. [7] Motor vehicle with an air guiding device (4) according to one of claims 1 to 5, in particular with a motor vehicle front part (1) according to claim 6.

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