System for a ventilation arrangement

Abstract

System for a ventilation arrangement for an engine room of a vehicle, wherein the ventilation arrangement to be arranged between the engine room and an environment of the vehicle has at least one primary opening (2) and at least one secondary opening (4a, 4b, 4c), wherein each primary opening (2) has at least one section to which a primary louvre (5, 6) is assigned, wherein each secondary opening (4a, 4b, 4c) has at least one section to which a secondary louvre (8a, 8b, 8c) is assigned, wherein at least one primary louvre (5, 6) of the at least one primary opening (2) is connected to a drive (10), wherein at least one secondary louvre (8a, 8b, 8c) of the at least one secondary opening (4a, 4b, 4c) is connected to the drive (10) via at least one mechanical transmission module, wherein each primary louvre (5, 6) is initially at an original primary angle relative to the respective section is provided,and wherein each secondary slat (8a, 8b, 8c) is initially positioned at an original secondary angle relative to the respective section, wherein the respective section is at least partially open, wherein the drive (10) is configured to move the at least one primary slat from the primary original angle to close the respective section and to position it at a reduced angle relative to the respective section, wherein the drive (10) is configured to move the at least one secondary slat (8a, 8b, 8c) from the secondary original angle over the at least one transmission module to close the respective section and to position it at the reduced angle relative to the respective section, wherein the system comprises, as the at least one mechanical transmission module, a transmission shaft (14) having a transmission axis, a primary end, and a secondary end,wherein a primary linkage lever (30) is arranged at the primary end of the transmission shaft (14), which is connected via a primary linkage point to a primary linkage axis (32) which is connected to the at least one primary lamella (5, 6), and wherein a secondary linkage lever (34) is arranged at the secondary end of the transmission shaft (14), which is connected via a secondary linkage point to a secondary linkage axis (36) which is connected to the at least one secondary lamella (8a, 8b, 8c).

Description

[0001] The invention relates to a system for a ventilation arrangement.

[0002] The document DE 10 2011 055 394 A1 describes an air flap arrangement for controlling a cooling air flow in an engine compartment of a vehicle.

[0003] An air flap arrangement for a vehicle is known from the document WO 2017 / 021205 A2.

[0004] From the publication DE 10 2014 107 103 A1 a ventilation grille flap arrangement for a motor vehicle is known.

[0005] Another air flap arrangement for a vehicle is known from the document US 2016 / 0 059 688 A1.

[0006] Against this background, one task was to efficiently close a ventilation arrangement for a vehicle's engine room.

[0007] This problem is solved by a system having the features of the independent patent claims. Embodiments of the system are evident from the dependent patent claims and the description.

[0008] The system according to the invention is designed for a ventilation arrangement for an engine room of a vehicle, wherein the ventilation arrangement to be arranged or arranged between the engine room and an environment of the vehicle has at least one primary opening and at least one secondary opening. Each primary opening has at least one primary section to which a primary louvre is assigned, wherein each secondary opening has at least one secondary section to which a secondary louvre is assigned. At least one primary louvre of the at least one primary opening can be connected, is to be connected, or is connected directly to a drive. Furthermore, at least one secondary louvre of the at least one secondary opening is indirectly mechanically connected, is to be connected, and / or coupled, is to be coupled, or is to be coupled to the drive via at least one mechanical transmission module.The common drive provided for the slats and the at least one transmission module are designed as components of the system. Each primary slat is initially positioned, pivoted, and / or arranged at an original primary angle relative to the respective primary section, at which the respective primary section is at least partially open. Furthermore, each secondary slat is initially positioned, pivoted, and / or arranged at an original secondary angle relative to the respective secondary section, wherein the respective secondary section is at least partially open.

[0009] The drive of the system is designed to directly move and / or rotate the at least one primary slat of the at least one primary opening in the direction of a reduced angle or to a reduced angle and to arrange it at the reduced angle in order to close or close the primary slats, starting from a primary original angle. The drive is further designed to indirectly move and / or rotate the at least one secondary slat of the secondary opening via the at least one mechanical transmission module in the direction of the reduced angle or to the reduced angle and to arrange it at the reduced angle in order to close or close the secondary slats, starting from a secondary original angle. The reduced angle is the same for all slats.

[0010] It is provided that at least one, usually central, mechanical transmission module has a transmission shaft with a transmission axis, a primary end, and a secondary end. A primary linkage lever is arranged at the primary end of the transmission shaft, which is connected via a primary linkage point to a primary linkage axis, which is directly or indirectly connected to the at least one primary plate. A secondary linkage lever is arranged at the secondary end of the transmission shaft, which is connected via a secondary linkage point to a secondary linkage axis, which is directly or indirectly connected to the at least one secondary plate.

[0011] It is possible that in the transmission shaft, the secondary articulation point to the transmission axis has a secondary articulation distance and the primary articulation point to the transmission axis has a primary articulation distance, wherein the secondary articulation distance is greater than the primary articulation distance.

[0012] It is also possible for a secondary center distance between the transmission axis and the secondary pivot axis to be greater than a primary center distance between the transmission axis and the primary pivot axis. Alternatively or additionally, the secondary pivot lever is longer than the primary pivot lever.

[0013] Due to the different articulation distances, usually due to the different center distances and / or due to different lengths of the articulation levers, a movement and / or force of the drive is transmitted from the transmission shaft to the at least one secondary lamella according to a ratio of the secondary articulation distance relative to the primary articulation distance, wherein the ratio is not equal to 1, wherein the movement and / or force is transmitted and / or translated by the transmission shaft according to the ratio of the quotient of the secondary to the primary articulation distance.

[0014] In a possible embodiment, the at least one mechanical transmission module can alternatively or additionally be designed as a transmission shaft, as a coupling rod and / or as a gear and / or have a transmission shaft, a transmission rod, a coupling rod and / or at least one gear. Gears can be of different sizes. It is conceivable that a transmission rod can also be rotated about a transmission axis, with a primary gear being arranged at a primary end of the transmission rod and a secondary gear at a secondary end, with the secondary gear having a larger diameter than the primary gear. Teeth of the primary gear engage with teeth of a primary gear on the primary articulation axis, and teeth of the secondary gear engage with teeth of a secondary gear on the secondary articulation axis, with the gears on the two articulation axes having the same diameter in the embodiment.

[0015] In one embodiment, it is possible for the system to have the ventilation arrangement and thus also the openings, wherein the at least one opening has a plurality of sections, which are generally directly adjacent to one another, wherein a slat is assigned to each section, wherein the at least one opening is assigned a sliding gate as a mechanical transmission module, via which the slats assigned to the opening are or become mechanically connected and / or coupled to one another, wherein the sliding gate is designed to transmit a movement between all the slats of the opening synchronously and / or simultaneously during closing. In one embodiment, it is conceivable for the drive to be connected to the sliding gate for all the slats of the at least one primary opening.It is also possible that the drive is only connected to a superior primary slat, which is connected via the sliding gate to other subordinate slats of the at least one primary opening.

[0016] In addition, a method for operating a ventilation arrangement for an engine room of a vehicle, e.g. a motor vehicle, is provided. The ventilation arrangement which is to be arranged, can be arranged and / or arranged between the engine room and an area surrounding the vehicle has at least one primary opening and at least one secondary opening. Each primary opening has at least one primary section to which a primary louvre is assigned. Each secondary opening has at least one secondary section to which a secondary louvre is assigned. At least one primary louvre of the at least one primary opening is or is directly connected and / or coupled to a drive. At least one secondary louvre of the at least one secondary opening is or is indirectly mechanically connected and / or coupled to the drive via at least one mechanical transmission module.Each primary slat is initially positioned, pivoted, and / or arranged at an original primary angle relative to the respective primary section, at which the section of the at least one primary opening is or is at least partially opened. Furthermore, each secondary slat is initially positioned, pivoted, and / or arranged at an original secondary angle relative to the respective secondary section, wherein the respective section of the at least one secondary opening is or is at least partially opened.

[0017] To close or seal the respective section of the at least one primary opening with the primary slat, the latter is moved and / or rotated by the drive, starting from the primary original angle in the direction of a reduced angle or to a reduced angle, usually directly, and / or is arranged at or below the reduced angle relative to the respective section of the at least one primary opening. Simultaneously or synchronously, to close or seal the respective section of the at least one secondary opening with the secondary slat, the latter is moved and / or rotated by the drive, starting from the secondary original angle in the direction of the reduced angle or to the reduced angle, usually indirectly, via the at least one mechanical transmission module, and is arranged at the reduced angle relative to the respective section of the at least one secondary opening.

[0018] It is provided that the common reduced angle for all slats, i.e. for the primary and for the secondary slats, is or will be set the same within the framework of usual manufacturing tolerances. In one embodiment, it is provided that the original primary angle and the original secondary angle at which the slats are or will be set to a respective section are or will be set to the same size. In this case, both the sections of the at least one primary opening and the sections of the at least one secondary opening are or will be originally opened to the same extent. In an alternative embodiment, the secondary original angle is or will be set smaller than the primary original angle, wherein the sections of the at least one primary opening are or will be originally opened wider than the sections of the at least one secondary opening.

[0019] In this case, a kinematic advance or projection is provided to the at least one secondary slat relative to the at least one primary slat during and / or for closing according to a difference between the primary and the secondary original angle. The provided original angles establish and / or provide a zero position for the slats during and / or for closing the sections, which, depending on the design, is the same for the secondary slats or less than for the primary slats. Furthermore, it is also possible to set different original secondary angles for different secondary slats, which depend, for example, on the number of transmission modules via which a respective secondary slat is connected to the drive.

[0020] In the method, it is further alternatively or additionally possible that an original movement of the drive is transmitted by the drive as a primary movement directly to the at least one primary slat.

[0021] Furthermore, the original movement of the drive is transmitted by the drive and via the at least one transmission module provided for this purpose, optionally also via the at least one primary slat as such a transmission module, as at least one secondary movement to the at least one secondary slat. It is possible that the at least one secondary movement is transmitted more quickly than the primary movement due to a mechanical transmission of the at least one transmission module by the at least one transmission module, wherein the respective section of the at least one secondary opening and the respective section of the at least one primary opening reach the usually common reduced angle at the same time, wherein the sections of all openings are closed simultaneously.

[0022] It is possible for all slats to be set at the same reduced angle to the sections after the sections have been closed. To open the sections, the primary slats are moved by the drive from the reduced angle directly to the primary original angle. The secondary slats are moved by the drive from the reduced angle indirectly to the secondary original angle via the at least one transmission module. It is possible for the primary and secondary original angles to be set to the same level, or for the primary original angle to be set greater than the secondary original angle, wherein the section of the at least one primary opening is opened wider than the section of the at least one secondary opening according to a difference between the primary and secondary angles.

[0023] In one embodiment, each slat can be positioned, pivoted, and / or arranged relative to the respective section at a maximum angle at which the section is maximally and / or completely opened and / or released by the respective slat, wherein this maximum angle is, for example, 90°. Furthermore, each slat can be positioned, pivoted, and / or arranged relative to the respective section at a minimum angle at which the section is minimally and / or completely closed by the respective slat, wherein this minimum angle is, for example, 0°. At least the primary original angle can correspond to the maximum angle. The secondary original angle can also correspond to the maximum angle or be smaller. It is also possible for both original angles to be smaller than the maximum angle. The common reduced angle can correspond to the minimum angle or be greater than it.

[0024] When the slats close, each primary slat covers a primary angular range between the original primary angle and the common reduced angle if it is usually moved directly by the drive. In addition, each secondary slat covers a secondary angular range between the original secondary angle and the common reduced angle if it is usually moved indirectly by the drive via the at least one transmission module. In this case, it is provided that the secondary angular range is smaller than the primary angular range or shortened compared to the primary angular range, and / or that the secondary angular range is covered by the secondary slat at the same speed as the primary angular range of the primary slat. The method makes it possible to compensate for mechanical play between the primary slats and the secondary slats.

[0025] In the method, a force or torque is transmitted between the drive and the at least one secondary slat by the at least one transmission module. In some embodiments, asynchronous and / or staggered closing of the different primary and secondary slats is also possible. Each opening can have several sections with several slats, forming a slat array.

[0026] It is possible for one embodiment of the method to be carried out with one embodiment of the system according to the invention. The ventilation arrangement can be designed and / or designated as an automatically closable and reopenable cooling air opening for a heat exchanger, for the engine compartment, e.g., an engine compartment, and / or for cooling components, e.g., brakes, aggregates, batteries, which can be supplied with air from the environment in different ways depending on the originally set angle for the primary and secondary louvers. At least one heat exchanger, a machine for driving the vehicle, e.g., an electric motor and / or an internal combustion engine, or other components that are to be cooled as needed, are arranged in the engine compartment.Furthermore, a duct can be connected to the closable primary and / or secondary louvers, via which duct cooling air is conveyed to areas outside the engine room, wherein components outside the engine room are to be cooled, e.g. brakes, wheel bearings, assemblies, transmissions, motors, pumps and / or electronic components. The ventilation arrangement and the system can be designed or referred to as a controllable cooling air inlet (SKE). The method provides a measure for optimizing the tightness of the ventilation arrangement and / or the controllable cooling air inlet, wherein leakage of the closed ventilation arrangement and / or the closed controllable cooling air inlet is reduced if all louvers are positioned and / or arranged at the same reduced angle relative to the sections of the openings.

[0027] The secondary louvres of the at least one secondary opening are kinematically pre-adjusted relative to the primary louvres of the at least one primary opening via the at least one transmission module, corresponding to a difference between the primary and secondary original angles. In this case, for a closed state of the ventilation arrangement, when all louvres are positioned at the minimum angle to the sections, any play resulting from a distance between the drive and a respective secondary louvre and / or due to the at least one transmission module located therebetween is eliminated.

[0028] The advance of the secondary slats, based on the difference between the primary and secondary original angles, is adjusted via the linkage levers and / or the at least one transmission shaft as the at least one transmission module. To provide the advance, the secondary linkage axis is spaced further from the transmission axis than the primary linkage axis. Furthermore, different linkage points can be provided for the primary and secondary linkage levers. A force and / or a torque of the drive is transmitted to the at least one secondary slat by the at least one transmission module, i.e., the transmission shaft and / or the linkage levers arranged thereon and / or a gear.In this case, the secondary original angle, which is smaller than the primary angle, can also be set with the at least one transmission module, wherein the different original angles in the design are used to set a respective zero position for the primary slats to be driven directly from the drive and the secondary slats to be driven indirectly from the drive and the at least one transmission module, wherein the intended advance travel is set for the secondary slats.

[0029] Alternatively or additionally, the secondary slats are kinematically provided with a greater path and / or a greater transmission ratio than the primary slats by means of the at least one transmission module, wherein the play in the closed state is eliminated via the at least one transmission module or an active chain provided thereby. A first transmission ratio is set between the drive and the at least one primary slat, and a second transmission ratio is set between the drive, the at least one transmission module and the at least one secondary slat, wherein the two transmission ratios are different. It is therefore possible for the secondary linkage lever on the transmission shaft to be longer than the primary linkage lever on the transmission shaft, wherein the secondary slats, when moved by the drive, have a longer path and / or a greater transmission ratio due to the at least one transmission module.cover a larger angular range than the primary slats. Furthermore, the required transmission ratio between the drive and the at least one secondary slat can be adjusted and / or specified by dimensioning the at least one transmission module.

[0030] It is understood that the features mentioned above and those to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present invention.

[0031] The invention is illustrated schematically in the drawing using embodiments and is described schematically and in detail with reference to the drawing. Fig. 1 shows a schematic representation of an example of a ventilation arrangement or a controllable air inlet by means of adjustable slats for a vehicle designed here as a motor vehicle, which has an embodiment of the system according to the invention for carrying out an embodiment of a method. Fig. 2 shows details from Fig. 1 to explain variants of the embodiment of the system and method according to the invention.

[0032] The figures are described coherently and comprehensively. The same reference symbols are assigned to the same components.

[0033] The Fig. The example of the ventilation arrangement schematically illustrated in Figure 1 is intended for a vehicle, embodied here as a motor vehicle, which has an engine compartment in which at least one heat exchanger, a cooling air duct, and a drive unit, e.g., an electric motor and / or an internal combustion engine, are arranged for driving and propelling the vehicle. The ventilation arrangement is arranged in an opening in a wall which separates the engine compartment from the vehicle's surroundings, as it is arranged therebetween. It is possible for the ventilation arrangement to be arranged behind a radiator grille of the vehicle. It is also possible for the ventilation arrangement to be connected separately to the vehicle's outer skin via a duct.

[0034] The ventilation arrangement comprises at least one primary opening 2 and a plurality of secondary openings 4a, 4b, 4c, each of which has largely rectangular cross-sectional areas. The primary opening 2 and a first secondary opening 4a are each arranged on a first side, here a driver's side, and a second and third secondary opening 4b, 4c are each arranged on a second side, here a passenger side, of the vehicle. A longitudinal axis of the vehicle runs centrally between the two sides, with the two openings 2, 4a on the first side and the two openings 4b, 4c on the second side, in the embodiment presented here, being arranged and formed symmetrically with respect to the longitudinal axis. The primary opening 2 and the second secondary opening 4b are each at a first distance from the longitudinal axis and also have the same first size or cross-sectional area.The first and third secondary openings 4a, 4c each have a second distance from the longitudinal axis and continue to have the same first cross-sectional area. The first distance is smaller than the second distance, and the first cross-sectional area is larger than the second cross-sectional area. A gap 18 is located between the primary opening 2 and the second secondary opening 4b.

[0035] The embodiment of the system according to the invention comprises a plurality of slats 5, 6, 8a, 8b, 8c, wherein in this case four slats 5, 6, 8a, 8b, 8c are each assigned to an opening 2, 4a, 4b, 4c. Furthermore, one slat 5, 6, 8a, 8b, 8c is each assigned to a section of a total of four sections of a respective opening 2, 4a, 4b, 4c. In this case, one slat 5, 6, 8a, 8b, 8c is pivotable relative to a respective section about a slat shaft, wherein each slat 5, 6, 8a, 8b, 8c is pivoted relative to the section by an angle. The set angle can have a minimum value of 0° and a maximum of 90°. A slat 5, 6, 8a, 8b, 8c, which is pivoted minimally relative to the section, here for example by 0°, is arranged parallel to a cross-sectional area of ​​the section, wherein the section is minimally, here completely, closed by the slat 5, 6, 8a, 8b, 8c.is, whereby an exchange of air between the engine room and the environment is prevented and / or prevented. A slat 5, 6, 8a, 8b, 8c, which is pivoted to the maximum relative to the section, here by 90°, is arranged perpendicular to the cross-sectional area of ​​the section, whereby the section is or is opened to the maximum and / or completely by the slat 5, 6, 8a, 8b, 8c, whereby a maximum exchange of air between the engine room and the environment is enabled because the section is free to allow air to flow through. If the slat 5, 6, 8a, 8b, 8c is or is pivoted relative to the section by an angle that is greater than a minimum possible angle and smaller than a maximum possible angle, here greater than 0° and less than 90°, the section is partially opened or correspondingly partially closed by this slat 5, 6, 8a, 8b, 8c.

[0036] The primary opening 2 is assigned a field of four primary louvres 5, 6, namely a superior, here upper, primary louvre 5 and three subordinate, here lower, primary louvres 6. Each secondary opening 4a, 4b, 4c is assigned a field of four secondary louvres 8a, 8b, 8c.

[0037] The system comprises a drive 10 with a drive shaft 13 as a mechanical transmission module, which is directly connected to the higher-level primary slat 5. The drive shaft 13 and the slat shaft of the higher-level primary slat 5 rotate about the same primary slat axis and are connected to one another in a rotationally fixed manner, with the higher-level primary slat 5 being directly driven by the drive 10. Furthermore, the system comprises a primary sliding gate 12a as a mechanical transmission module, which is assigned to the primary opening 2. The primary sliding gate 12a connects the drive shaft 13 and / or the higher-level primary slat 5 or its slat shaft to the three lower-level primary slats 6 or their slat shafts. In this case, a movement of the drive shaft 13 and / or the higher-level primary slat 5 is transmitted via the primary displacement link 12a to each of the three lower-level primary slats 6 orwhose slat shafts are transmitted synchronously, whereby the subordinate primary slats 6 are driven indirectly via the primary sliding gate 12a.

[0038] In addition, the same angle is set for each subordinate primary slat 6 relative to the section to which it is assigned via or with the primary sliding gate 12a, which angle is also set for the superordinate primary slat 5 relative to the section to which it is assigned.

[0039] Furthermore, at least one primary slat 5, 6 or its slat shaft and / or the primary sliding gate 12a is connected via a first coupling rod 16a as a transmission module to secondary slats 8a of the first secondary opening 4a and / or to another sliding gate (not shown) for these secondary slats 8a. This first coupling rod 16a synchronously transmits a movement and / or a moment of the primary slats 5, 6 to the secondary slats 8a.

[0040] A transmission shaft 14 is arranged in the intermediate space 18 as a transmission module, which connects the primary slats 5, 6 or their slat shafts and / or the sliding gate 12a for the primary slats 5, 6 of the primary opening 2 with the secondary slats 8b or their slat shafts of the second secondary opening 4b and / or another secondary sliding gate 12b as a transmission module for the secondary slats 8b. With the transmission shaft 14, a movement and / or force is / are synchronously transmitted from the sliding gate 12a and / or the primary slats 5, 6 to the secondary slats 8b.

[0041] Furthermore, the secondary slats 8b of the second secondary opening 4b or their slat shafts are connected via a second coupling rod 16b as a transmission module to secondary slats 8c of the third secondary opening 4c and / or to an additional sliding gate (not shown) for these secondary slats 8c. With this second coupling rod 16b, a movement and / or a moment of the secondary slats 8b of the second secondary opening 4b is / are transmitted synchronously to the secondary slats 8c of the third secondary opening 4c.

[0042] Details of the transmission shaft 14 in the space 18 are in Fig.2. The transmission shaft 14 comprises a transmission axis around which the transmission shaft 14 rotates. At a primary end of the transmission shaft 14, which here faces the primary slats 5, 6 and the primary opening 2, a primary linkage lever 30 is arranged as a transmission module, which is connected via a primary linkage point to a primary linkage axis 32, which is connected to the primary slats 5, 6 and / or the primary sliding gate 12a. At an opposite secondary end of the transmission shaft 14, which here faces the secondary slats 8b and the second secondary opening 4b, a secondary linkage lever 34 is arranged, which is connected via a secondary linkage point to a secondary linkage axis 36, which is connected to the secondary slats 8b, which rotate about secondary slat axes, and / or the secondary sliding gate 12b.

[0043] In the embodiment of the method for operating the ventilation arrangement presented here, each primary louvre 5, 6 is initially positioned at an originally primary angle, and each secondary louvre 8a, 8b, 8c is initially positioned at an originally secondary angle relative to the respective section, wherein the respective section is at least partially open. To close the primary louvres 5, 6, they are moved from the primary original angle to a reduced angle via the drive 10. To close, the secondary louvres 8a, 8b, 8c are rotated from the secondary original angle to the same reduced angle as the primary louvres 5, 6 via the drive 10 and the at least one transmission module, at least via the transmission shaft 14.

[0044] In a first variant of the embodiment of the system presented here or a first variant of the embodiment of the method to be carried out or carried out therewith, a secondary axis distance between the transmission axis and the secondary articulation axis 36 is greater than a primary axis distance between the transmission axis and the primary articulation axis 32. Alternatively or additionally, the secondary articulation lever 34 is longer than the primary articulation lever 30.

[0045] In a second variant of the embodiment of the system presented here or a second variant of the embodiment of the method to be carried out or carried out therewith, the secondary articulation point has a secondary articulation distance from the secondary transmission axis and the primary articulation point has a primary articulation distance from the transmission axis, wherein the secondary articulation distance is greater than the primary articulation distance.

[0046] In at least one of the variants of the system or method presented here, usually at least in the second variant, the common reduced angle for the primary and the secondary slats 5, 6, 8a, 8b, 8c is the same (within the scope of usual manufacturing tolerances), wherein the original primary angle and the original secondary angle are or are set to be the same when the drive 10 is activated to close the slats 5, 6, 8a, 8b, 8c, wherein sections of the at least one primary opening 2 and sections of the at least one secondary opening 4a, 4b, 4c are open to the same extent. Alternatively or additionally, in at least one of the variants, usually at least in the first variant, the secondary original angle is or is set smaller than the primary original angle. In this case,Each section, to which a secondary slat 8a, 8b, 8c is assigned, is further closed according to a difference between the originally primary and the originally secondary angle. The at least one secondary slat 8a, 8b, 8c has a projection relative to the at least one primary slat 5, 6, which projection results depending on the difference between the originally primary and the originally secondary angle when and / or as soon as the drive 10 is activated to close all slats 5, 6, 8a, 8b, 8c. It is possible to combine both variants presented here. REFERENCE SYMBOL: 2 primary opening 4a, 4b, 4c secondary opening 5, 6 primary lamella 8a, 8b, 8c secondary lamella 10 Drive 12a, 12b sliding backdrop 13 Drive shaft 14 Transmission shaft 16a, 16b coupling rod 18 gap 30 primary control levers 32 primary pivot axis 34 secondary control levers 36 secondary pivot axis

Claims

[1] System for a ventilation arrangement for an engine room of a vehicle, wherein the ventilation arrangement to be arranged between the engine room and an environment of the vehicle has at least one primary opening (2) and at least one secondary opening (4a, 4b, 4c), wherein each primary opening (2) has at least one section to which a primary louvre (5, 6) is assigned, wherein each secondary opening (4a, 4b, 4c) has at least one section to which a secondary louvre (8a, 8b, 8c) is assigned, wherein at least one primary louvre (5, 6) of the at least one primary opening (2) is connected to a drive (10), wherein at least one secondary louvre (8a, 8b, 8c) of the at least one secondary opening (4a, 4b, 4c) is connected to the drive (10) via at least one mechanical transmission module, wherein each primary louvre (5, 6) is initially rotated at an original primary angle relative to the respective section,and wherein each secondary slat (8a, 8b, 8c) is initially positioned at an original secondary angle relative to the respective section, wherein the respective section is at least partially open, wherein the drive (10) is configured to move the at least one primary slat from the primary original angle to close the respective section and to position it at a reduced angle relative to the respective section, wherein the drive (10) is configured to move the at least one secondary slat (8a, 8b, 8c) from the secondary original angle over the at least one transmission module to close the respective section and to position it at the reduced angle relative to the respective section, wherein the system comprises, as the at least one mechanical transmission module, a transmission shaft (14) having a transmission axis, a primary end, and a secondary end,wherein a primary linkage lever (30) is arranged at the primary end of the transmission shaft (14), which is connected via a primary linkage point to a primary linkage axis (32) which is connected to the at least one primary lamella (5, 6), and wherein a secondary linkage lever (34) is arranged at the secondary end of the transmission shaft (14), which is connected via a secondary linkage point to a secondary linkage axis (36) which is connected to the at least one secondary lamella (8a, 8b, 8c). [2] The system of claim 1, wherein the secondary articulation point has a secondary articulation distance from the transmission axis and the primary articulation point has a primary articulation distance from the transmission axis, the secondary articulation distance being greater than the primary articulation distance. [3] System according to claim 1 or 2, wherein a secondary axis distance between the transmission axis and the secondary articulation axis (36) is greater than a primary axis distance between the transmission axis and the primary articulation axis (34), and / or wherein the secondary articulation lever (34) is longer than the primary articulation lever (30). [4] System according to one of claims 1 to 3, which comprises a coupling rod (16a, 16b) and / or a gear as at least one mechanical transmission module. [5] System according to one of claims 1 to 4, in which at least one opening (2, 4a, 4b, 4c) has a plurality of sections, each section being assigned a slat (5, 6, 8a, 8b, 8c), the at least one opening (2, 4a, 4b, 4c) being assigned a sliding gate (12a, 12b) as a mechanical transmission module, via which the slats (5, 6, 8a, 8b, 8c) assigned to the opening (2, 4a, 4b, 4c) are mechanically connected to one another, the sliding gate (12a, 12b) being designed to transmit a movement during closing between the slats (5, 6, 8a, 8b, 8c) of the opening (2, 4a, 4b, 4c). [6] System according to one of claims 1 to 5, with which the reduced angle for the at least one primary slat and the at least one secondary slat (8a, 8b, 8c) is set to be equal, wherein the original primary angle and the original secondary angle are set to be equal, or wherein the secondary original angle is set to be smaller than the primary original angle. [7] System according to one of claims 1 to 5, with which an original movement of the drive (10) is transmitted from the drive (10) as a primary movement directly to the at least one primary slat (5, 6) and via the at least one transmission module as at least one secondary movement to the at least one secondary slat (8a, 8b, 8c).

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