DE10257838B4 - Ventilation module for a radiator of an internal combustion engine - Google Patents

Abstract

Ventilation module for attachment to a cooler (11) of an internal combustion engine of a motor vehicle, which has an air passage area (111), with a plate (13) which at least partially covers the air passage area (111) and has at least one air passage opening (16), and with one of the air passage opening ( 16) associated air flap (22), which is pivotably fixed to the plate (13) for blocking and releasing the air passage opening (16), the at least one air flap (22) being formed from the plate (13) and its pivotability at least due to resilient design of an adjacent plate section (23), the air flap (22) being a rigid plate section (24) of the plate (13) which fills the air passage opening (16) and which is connected to the plate (13) via the at least one resilient plate section (23) ) is integrally connected and rectangular, characterized in that the resilient Plate section (23) is designed as a bending beam (25) which is formed on each narrow side of the rigid plate section (24).

Description

State of the art

The invention relates to a ventilation module for a radiator having an air passage surface of an internal combustion engine of a motor vehicle according to the preamble of claim 1.

A known ventilation module of this type is designed as a full-surface installation frame in which a radiator fan or fan for the radiator of the internal combustion engine is added. The full-surface frame has a circular large opening in which the blower or fan of the radiator fan or fan is added. The impeller is driven by an electric motor, which is held in the frame. In the area of the solid surface of the installation frame which is recessed from the large opening, there are smaller auxiliary openings which are opened or closed by air dampers as a function of the dynamic pressure forming in front of the radiator during the drive of the motor vehicle. The additional openings are used at high driving speed of the vehicle, in which the driving wind provides air cooling and the cooling fan can be switched off, for ventilation and the areas of the air passage surface of the radiator not covered by the large opening in the mounting frame. At low driving speed and high engine power, z. B. when driving uphill, as well as at standstill of the vehicle with the engine running, however, a "obstruction" of the additional openings by the associated louvers is required to ensure optimum ventilation of the radiator by the then turned on radiator fan.

In document JP 56-060 818 A is a Einbauzarge, as described above with additional openings, which are closed by louvers disclosed. The louvers are connected via hinges, in particular film hinges with the installation frame. The installation frame has an additional component with the stopper. The stoppers prevent opening of the louvers in an undesired direction.

In document JP 57-173519 A is a built-in frame with hinges connected by air vents shown.

It is also known to manufacture the louvers as separate components and mounted in the mounting frame.

The object of the invention is to improve in a ventilation module according to the preamble of claim 1 and the preamble of claim 2, the geometry of the connection of the air damper with the frame.

The object is achieved in a generic ventilation module with the features according to the characterizing parts of the independent claims.

Advantages of the invention

Using the geometry of the louvers, the force required to open the louvers can be set to the desired value.

In the further claims advantageous developments of the specified in claim 1 and 2 ventilation module are given.

According to an advantageous embodiment of the invention, the air flap is a the air passage opening fills, rigid plate portion which is partially cut free from the plate and integrally connected via the at least one resilient plate portion with the plate.

The pivotability of the rigid plate portion enabling spring-elastic plate portion may be formed as a bending beam or torsion bar. When the rigid plate section is formed rectangularly, two bending beams are respectively provided on the narrow sides of the rigid plate section and a torsion bar is provided on a longitudinal side of the rigid plate section.

According to an advantageous embodiment of the invention, plate and plate sections are injection molded in the same manufacturing process by injection molding of plastic. The use of plastic material has the additional advantage that the material stiffness is temperature-dependent and thus at higher radiator temperatures only a reduced force for pivoting the louvers and the associated opening of the air passage openings is required by the driving wind.

The ventilation module according to the invention can advantageously be used as a full-surface installation frame for accommodating a radiator fan or radiator shutter arranged upstream of the radiator, with which the air flow of the radiator caused by the driving wind can be throttled or stopped, e.g. B. in the warm-up phase of the internal combustion engine.

According to an advantageous embodiment of the invention, the ventilation module has a fan frame attachable to the radiator, into which at least one impeller of a radiator fan is inserted. The plate with several molded, pivoting louvers forms a separate ram air flap unit, which is based on a blower-free, hollow Zargenbereich put on and attached to the frame, for example, screwed or clipped. Due to the separation of the fan cowl and the plate, a different material than for the fan cowl can be used to produce the plate, with which the desired opening force for the louvers can be achieved more favorably. In addition, the manufacturing effort for the production of the ram air flap unit simplified. By simply clipping the plate on the fan frame, the additional assembly costs can be kept low.

According to an advantageous embodiment of the invention, at least two air intake for the reception of each fan of a radiator fan are formed in the fan frame. While an impeller is used in at least one air intake, at least one other air intake is assigned to the ram air flap unit, d. H. upstream or downstream in the airflow. This structural measure is particularly advantageous for double and multiple fans of a radiator fan, since now the air flow can be varied using the ram air flap unit. The fan cowl can be equipped in the example with two air intake either with two impellers or with only one impeller, the then fallen opening of the other air intake is covered by the ram air flap unit.

drawing

The invention is explained in more detail with reference to embodiments illustrated in the drawings in the following description. Show it:

1 FIG. 2 a perspective top view of a ventilation module designed as a mounting frame in conjunction with a radiator of an internal combustion engine of a motor vehicle, shown schematically,

2 an enlarged top view of the section II in FIG 1 .

3 and 4 each detail a same representation as in 2 according to two further embodiments,

5 3 a longitudinal section of the ventilation module designed as a radiator shutter in conjunction with a radiator for the internal combustion engine of a vehicle, shown schematically,

6 to 8th in each case a top view of a ventilation module according to three further embodiments in an exploded view.

Description of the embodiments

This in 1 in plan view ventilation module 10 for a cooler 11 an internal combustion engine or an internal combustion engine of a motor vehicle is designed as a so-called. Installation frame in which a radiator fan 12 or radiator fan for additional ventilation of the radiator 11 is included. In known manner, the cooler 11 an air-water heat exchanger in which the heated in the engine cooling water its heat to the one air passage surface 111 the radiator 11 passing through the air.

The ventilation module 10 has a stiff plate 13 on that to the radiator 11 attachable and the entire air passage area 111 the radiator 11 covered. Usually - as in 1 is shown - the plate 13 , in the direction of air flow through the radiator 11 seen (arrow 14 in 1 ), behind the radiator 11 arranged. In some cases, but also the arrangement of the plate 13 in front of the radiator 11 possible. The plate 13 has a circular large opening 15 as well as several, smaller air passage openings 16 Open as additional openings in one of the large opening 15 recessed areas of the plate 13 lie. The in the ventilation module 10 integrated radiator fan 12 has an impeller 17 that in the big opening 15 rests, as well as the impeller 17 driving electric motor 18 on. In 1 is from the radiator fan 12 only the impeller 17 with the wheel hub 19 , at the wheel hub 19 attached paddles 20 and with that the paddles 20 at the wheel hub 19 facing away from each end connecting hollow cylindrical stiffening ring 21 shown. The electric motor 18 is removed. The complete radiator fan 12 is in 5 Shown schematically in longitudinal section. How out 5 it can be seen overlaps the wheel hub 19 the electric motor 18 frontally and is this with a driver plate not visible here, the rotation on the output shaft of the electric motor 18 sits, connected. The electric motor 18 is supported on the housing side of the ventilation module.

Each of the air passage openings 16 is with a damper 22 occupied, which is formed pivotally and the air passage opening 16 blocked or released. Here are the louvers 22 designed so that at a certain dynamic pressure, which is caused by the driving wind of the moving motor vehicle, the louvers 22 pivot and thus the air passage openings 16 be released. At low driving speed, however, swing the air flaps 22 back and block the air passages 16 , The obstruction of the air passage openings 16 is required so that at low speed and high power of the engine, eg. B. Hill driving, or at standstill of the vehicle with the internal combustion engine then switched on the radiator fan 12 the cooler 11 optimally ventilated. For this it is necessary that the radiator fan 12 primarily air over the large opening 15 and almost no external air through the air passage openings 16 sucks, which would lead to a reduction of the blower output. At high speed, however, it is necessary that this so-called. Obstruction of the air passage openings 16 is canceled and the driving wind then with switched off radiator fan 12 the cooler 11 over the entire air passage area 111 can flow through.

The louvers 22 are made directly from the plastic plate 13 formed, and their pivotability is characterized by a resilient design of at least one adjacent plate portion 23 brought about. How out 2 can be seen more clearly, is the air damper 22 a the air passage opening 16 filling, from the plate 13 cut out of the plate 13 rigid plate section 24 , which has at least one elastic panel section 23 with the plate 13 is integrally connected. The plate 13 and the two plate sections 23 . 24 are injected in the same manufacturing process by injection molding. To clarify the valve integration in the plate 13 is the in 2 - 4 partial plate in plan view 13 hatched, but the hatching should not be interpreted as a cross-sectional image.

In the embodiment of 2 is the resilient plate section 23 as a bending beam 25 executed on each narrow side of the rectangular, rigid plate section 24 is trained. Every bending beam 25 gets from a meandering strip 26 formed of the plate material, by introducing slot-like recesses 27 in each of the narrow sides of the rigid plate section 24 adjacent panel section 23 won. Through this strip of material 26 becomes the plate section 23 in the manner of a bending beam 25 elastic and the stiff plate section 24 can be by means of both sides existing, elastic panel sections 23 in the form of the two bending beams 25 when applying a sufficiently high force to the plate section 24 in 2 Swivel perpendicular to the page.

In the embodiment of 3 is the resilient plate section 23 as a torsion bar 28 carried out on the upper longitudinal side of the rigid plate portion 24 is trained. Again, can be by twisting the resilient plate section 23 like a torsion bar the rigid plate section 24 perpendicular to the sheet in 3 swing.

In the embodiment of the 4 is the resilient plate section 23 as a movie hinge 29 formed along the upper longitudinal side of the rigid plate portion 24 extends. By means of the film hinge 29 can be the rigid plate section 24 also in 4 Swivel perpendicular to the page.

At the in 5 in longitudinal section illustrated embodiment of the ventilation module 10 this is used as a radiator shutter and this with a variety of air passage openings 16 provided, all with a trained in the manner described above air damper 22 are occupied. The preferably rectangular, elongated air passage openings 16 are arranged in parallel side by side in one or more vertical rows spaced apart and evenly over the entire surface of the plate 13 distributed. The plate 13 is doing, in the flow direction of the air through the radiator 11 seen (arrow 14 ), in front of the radiator 11 arranged and in turn covers its entire air passage area 111 , In the in 5 shown illustration are the louvers 22 from the driving wind from the air passage openings 16 swung out so that the radiator 11 over its entire air passage area 111 flows through the driving wind.

In the direction of flow (arrow 14 ) behind the radiator 11 is the fan blower 12 Arranged in one with the radiator 11 connected frame 30 is held. The radiator fan 12 is formed in the same way as described above, and that of the wheel hub 19 partially overruled electric motor 18 is about striving 31 in the frame 30 supported. With in 1 Matching components are provided with the same reference numerals.

When the vehicle is at a standstill or at low driving speed, in turn, the air passage openings 16 in the plate 13 through the louvers 22 locked so that the radiator 11 does not flow through the driving wind and so the cooling water is brought to operating temperature faster during the warm-up phase of the engine.

This in 6 in an exploded view sketched ventilation module 10 has a fan cowl 32 into which a blower wheel 17 the radiator fan is used. The plate 13 with a plurality of superposed louvers 22 is designed as a separate component and as a so-called. Ram door unit on the fan cowl 32 attachable and attachable to this. The on the radiator 11 in the same way as 5 illustrated attached fan cowl 32 itself covers the air passage area as a closed surface 111 the radiator 11 and is on the one hand with a collar-shaped air intake 33 into the fan wheel 17 is used, and with an embodiment of the 6 approximately rectangular recess 35 Mistake. On this the recess 35 containing area of the fan cowl 32 is the air flaps 22 containing plate 13 put on and from the edge of the plate 13 protruding snap hook 36 on the fan cowl 32 clipped. The louvers 22 are integral with the plate in the same manner as described above 13 trained and bending beam, torsion bars or - as in the embodiment of 6 shown - about film hinges 29 at the plate 13 held pivotally, which are designed so that at high speeds, the louvers 22 be pivoted and thus the air passage openings 16 release, so that the driving wind through the open, the recess 35 in the fan cowl 32 upstream air passage openings 16 through the radiator 11 can flow through.

At the ventilation module 10 according to 7 is the fan cowl 32 designed for receiving two radiator fans and accordingly has two air intake 33 and 34 on, but the number of radiator fan and thus the number of air intake can also be larger. This in 7 illustrated ventilation module 10 is adapted to the case that the radiator 11 The vehicle requires only a radiator fan due to the nature of the vehicle. As a result, there is only one impeller 17 Available in the one air intake 33 is used. The second air intake 34 remains open and offers the driving wind a circular air passage to the radiator 11 , The free air intake 34 having area of the fan cowl 32 is from the of the plate 13 with integrated air dampers 22 formed ram air flap unit covered and z. B. by means of screws on the fan cowl 32 attached, including in the plate 13 Clearance holes 37 and in the fan cowl 32 threaded holes 38 are provided. A quick release clipping of the plate 13 at the fan cowl 32 as they too 6 is also possible. The plate 13 with integrated, pivoting air caps 22 is formed in the same way as described above.

When removing the ram air flap unit of the ventilation module 10 with two blower wheels 17 be equipped, one of which in each of the air intake 33 . 34 is used.

At the ventilation module 10 according to 8th is the fan cowl 32 as they too 7 is shown and described, with two impellers 17 . 17 ' equipped, each in an associated air intake 33 . 34 the fan cowl 32 are used. The plate 13 is as a ram air flap unit with two rows of superimposed louvers 22 to close and release in the plate 13 incorporated air passage openings 16 educated. In each case a series of louvers 22 is an impeller 17 respectively. 17 ' assigned, so that at the fan cowl 32 attached plate 13 in each case a series of louvers 22 an impeller 17 respectively. 17 ' upstream in the air flow direction. The plate 13 is in turn detachable on the fan cowl 32 attached, z. B. by screws or snap hooks 36 as they are in 6 are shown, so that the plate 13 if necessary from the fan cowl 32 can be easily removed. Alternatively, it is possible to use the plate 13 as in 7 with only a series of louvers 22 and this optionally one or the other impeller 17 or 17 ' vorzusetzen.

Claims (14)

Ventilation module for attachment to an air passage surface ( 111 ) having coolers ( 11 ) an internal combustion engine of a motor vehicle, with an air passage area ( 111 ) at least partially overlapping plate ( 13 ), the at least one air passage opening ( 16 ), and with one of the air passage opening ( 16 ) associated air damper ( 22 ) used to block and release the air passage opening ( 16 ) pivotable on the plate ( 13 ), wherein the at least one air flap ( 22 ) from the plate ( 13 ) and their pivotability by resilient design of at least one adjacent plate portion ( 23 ), whereby the air flap ( 22 ) the air passage opening ( 16 ) filling, rigid plate section ( 24 ) of the plate ( 13 ), which over the at least one resilient plate portion ( 23 ) with the plate ( 13 ) is integrally connected and rectangular in shape, characterized in that the resilient plate portion ( 23 ) as a bending beam ( 25 ) carried out on each narrow side of the rigid plate section ( 24 ) is trained. Ventilation module for attachment to an air passage surface ( 111 ) having coolers ( 11 ) an internal combustion engine of a motor vehicle, with an air passage area ( 111 ) at least partially overlapping plate ( 13 ), the at least one air passage opening ( 16 ), and with one of the air passage opening ( 16 ) associated air damper ( 22 ) used to block and release the air passage opening ( 16 ) pivotable on the plate ( 13 ), wherein the at least one air flap ( 22 ) from the plate ( 13 ) and their pivotability by resilient design of at least one adjacent plate portion ( 23 ), whereby the air flap ( 22 ) the air passage opening ( 16 ) filling, rigid plate section ( 24 ) of the plate ( 13 ), which over the at least one resilient plate portion ( 23 ) with the plate ( 13 ) is integrally connected and rectangular in shape, characterized in that the resilient plate portion ( 23 ) as a torsion bar ( 28 ) is executed, on a longitudinal side of the rigid plate section ( 24 ) is trained Ventilation module according to claim 1 or 2, characterized in that the plate ( 13 ) and their plate sections ( 23 . 24 ) are injection molded from plastic in the same manufacturing process. Ventilation module according to one of claims 1-3, characterized in that the plate ( 13 ) a variety of with louvers ( 22 ) occupied air passage openings ( 16 ) having. Ventilation module according to claim 4, characterized in that the air passage openings ( 16 ) evenly over the surface of the plate ( 13 ) are arranged distributed. Ventilation module according to one of claims 4 or 5, characterized in that the air passage openings ( 16 ) are arranged one above the other in parallel in at least one vertical row. Ventilation module according to claims 4-6, characterized in that the plate ( 13 ) the entire air passage area ( 111 ) of the radiator ( 11 ) and in the flow direction ( 14 ) of the air through the radiator ( 11 ) seen in front of the radiator ( 11 ) is arranged. Ventilation module according to any one of claims 1-3, characterized in that the plate ( 13 ) a circular large opening ( 15 ) for receiving an impeller ( 17 ) of a radiator fan ( 12 ) and that the at least one with the air damper ( 22 ) occupied air passage opening ( 16 ) as an additional opening in one of the large opening ( 15 ) recessed plate area is located. Ventilation module according to claim 8, characterized in that the plate ( 13 ) in the direction of flow ( 14 ) of the air through the radiator ( 11 ) seen behind the radiator ( 11 ) is arranged. Ventilation module according to one of claims 1-3, characterized by a on the radiator ( 11 ) Fastenable fan frame ( 32 ) into which at least one impeller ( 17 ) of a radiator fan ( 12 ) is inserted, and that the plate ( 13 ) can be placed on a fan-free, hollow frame area and on the fan cowl ( 32 ) is formed releasably fixed. Ventilation module according to claim 10, characterized in that in the fan cowl ( 32 ) at least two air intake nozzles ( 33 . 34 ) for receiving one impeller ( 17 ) are formed and that in at least one air intake ( 33 ) an impeller ( 17 ) and at least one other air intake ( 34 ) from the plate ( 13 ) with integrated, pivotable louvers ( 22 ) is covered. Ventilation module according to one of claims 1-3, characterized by a on the radiator ( 11 ) Fastenable fan frame ( 32 ), into the two impellers ( 17 . 17 ' ) are inserted, that the plate ( 13 ) to the fan cowl ( 32 ) attachable and releasably securable is formed and that the plate ( 13 ) a plurality of in each case one air passage opening ( 16 ) covering louvers ( 22 ), which in at the fan cowl ( 32 ) plate ( 13 ) at least one impeller ( 17 ) are arranged upstream. Ventilation module according to claim 12, characterized in that the plate ( 13 ) Rows of superposed louvers ( 22 ), each one an impeller ( 17 . 17 ' ) are arranged upstream. Ventilation module according to any of claims 10-13, characterized in that (for releasably fixing the plate 13 ) on the fan cowl ( 32 ) Clips ( 36 ) on the plate ( 13 ) are arranged.

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