motor vehicle

Abstract

Motor vehicle with a receiving space (20) arranged in the front region, which is delimited by a receiving space wall (22), wherein the receiving space wall (22) has an engagement opening (30), a front hood (40) which is movable between a closed position and an open position such that the front hood (40) closes the engagement opening (30) in a fluid-tight manner in its closed position, wherein the front hood can be designed optionally with a pedestrian protection adjusting device (60) or without the pedestrian protection adjusting device (60), at least one opening (321, 322) is provided on the receiving space wall (22), on which opening a cover element (34) is mounted which, depending on whether the front hood is designed with or without a pedestrian protection adjusting device, is designed as a ventilation grille device (36) or as a closure device (38).

Description

The invention relates to a motor vehicle, having a receiving space arranged in the front region, which is bounded by a receiving space wall, wherein the receiving space wall has an engagement opening, a front hood, which can be moved between a closed position and an open position, in such a way that the front hood in its closed position closes the engagement opening in a fluid-tight manner, wherein the front hood can be optionally designed with a pedestrian protection adjusting device or without the pedestrian protection adjusting device.Motor vehicles having a receiving space arranged in the front region are known from the prior art. In particular, the motor vehicles with a central engine or a rear engine have a trunk which is designed as a receiving space and is arranged in the front region. In addition, electric vehicles usually have a receiving space arranged in the front region. The receiving space is usually bounded by a receiving space wall, wherein the receiving space wall has an engagement opening through which it is possible to engage into the receiving space and objects can be inserted into the receiving space designed as a trunk. For closing the engagement opening, a front hood is provided, which is movable between a closed and open position. The front hood closes off the receiving space in a fluid-tight manner, so that objects which are not intended to become moist or dirty can be deposited in the receiving space. A vehicle of this type having a receiving space arranged in the front region is disclosed in DE 10 2008 053 767 A1.The front hoods are usually mounted pivotably via hinges on a side facing the windshield and fixed in the closed position by means of a hood lock on a side facing away from the windshield. Alternatively, the front hoods can be designed for pedestrian protection in the event of a front crash of the motor vehicle with a pedestrian with a pedestrian protection adjusting device. The pedestrian protection adjusting device has a pyrotechnic actuator and a special hood mounting, wherein, when a front impact of a pedestrian is detected, in particular by sensors provided in the front region, the pyrotechnic actuator is triggered and the hood is displaced upward in the vehicle vertical direction on the side facing a windshield. This process must take place in the shortest time in order to ensure sufficient pedestrian protection. By adjusting the hood, an additional crushing zone is created for the pedestrians and an impact of the pedestrian on the hard carrier parts of the vehicle is prevented. Such an adjusting device is disclosed, for example, in DE 20 2013 101 518 U1.In the event of a pedestrian impact on the front hood, which is mounted only pivotably on the motor vehicle body and does not have a pedestrian protection adjusting device, the air in the receiving space is compressed and the pressure in the receiving space is increased, wherein the increase in the air pressure in the receiving space counteracts a deformation of the front hood in the event of an impact of a pedestrian. As a result, there is a relatively high risk of injury to the pedestrian and a relatively high HIC (Head Injury Criterion) value is present. In the case of a front hood with a pedestrian protection adjusting device, the adjusting of the front hood leads to a fluidic connection between the receiving space and the external environment and thus to a pressure equalization between the receiving space and the external environment.From DE 10 2019 125 586 A1, a motor vehicle is known which has a front hood, a pedestrian protection adjusting device for adjusting the front hood in the event of a detected pedestrian impact, a receiving space which is restricted by a receiving space wall and which can be closed in a fluid-tight manner by the front hood, and a venting device which is permanently provided on the receiving space wall and is non-detachably connected to the receiving space wall.Usually, the same model of a motor vehicle is executed with or without the pedestrian protection attachment device, depending on the requirement. For example, different requirements can apply in different countries, so that motor vehicles of a vehicle model, i.e. motor vehicles of substantially identical design, are delivered for different countries with embodiments modified from one another. On the other hand, a vehicle model can be embodied, for example, as a road vehicle which must have measures or devices, for example pedestrian protection devices, required for operation in road traffic, or as a racing vehicle which is driven exclusively on a track and has as far as possible no unnecessary, weight-increasing components. In this case, the road vehicle is executed with and the racing vehicle without the pedestrian protection device, wherein other components are identical.The object of the invention is to provide a motor vehicle with or without a pedestrian protection adjusting device, which can be adapted to the different requirements in a simple and cost-effective manner.The object of the invention is achieved by the features of claim 1.According to the invention, at least one opening is provided on the receptacle space wall, which opening is covered by a cover element, which opening is designed as a ventilation grid device or as a closure device depending on whether a pedestrian protection adjusting device is provided or not provided on the front hood. The venting device and the closure device are designed in such a way that the geometric dimensions relevant for the mounting on the receptacle space wall are identical.As a result, the components relating to the receiving space can be designed identically for all motor vehicles of a vehicle model and independently of whether a pedestrian protection adjusting device is present or not present, wherein it is merely necessary to distinguish whether a venting device or a closure device has to be mounted. In this way, motor vehicles can be produced in a simple and cost-effective manner with or without a pedestrian protection adjusting device and can be adapted to the requirements in a simple and cost-effective manner.Preferably, in the case of a front hood with the pedestrian protection adjusting device, the closure device is arranged on the opening and, in the case of a front hood without the pedestrian protection adjusting device, the ventilation grid device is arranged on the opening. By mounting the ventilation grid device, in the case of a front hood without a pedestrian protection adjusting device, a pressure increase in the receiving space counteracting the deformation of the front hood in the event of a pedestrian impact can be reliably avoided and the HIC value can thereby be reduced. In the case of a front hood with a pedestrian protection adjusting device, the closure device can be mounted on the opening, which is in particular a plastic panel manufactured cost-effectively.In a preferred embodiment, a first and a second opening are provided on the receiving space wall, wherein a venting device is arranged on each of the two openings depending on the size of the openings, or a venting grid device is arranged on the first opening and a closure device is arranged on the second opening. In a front hood with the pedestrian protection adjusting device, both openings can be closed by a respective closing device, whereby penetration of dirt and moisture into the receiving space can be reliably prevented. In a front hood without a pedestrian protection adjusting device, either a venting grid device can be mounted on both openings or the venting grid device can be mounted on only one of the openings and the closure device can be mounted on the other opening. It is decisive that the cross section of the venting grid device or venting grid devices is sufficiently large that, in the event of a sudden deformation of the front hood and thus an abrupt reduction in the receiving space, the air in the receiving space can escape quickly and, as a result, a critical increase in pressure in the receiving space can be reliably avoided. Thus, depending on the size of the openings, a venting grid device can be mounted on both openings or only on one of the openings, wherein a closure device is mounted on the other opening.Preferably, the cover, i.e. the venting grid device or the closure device, is detachably connected, preferably locked, to the receiving space wall. As a result, the closure device and the venting grid device can be easily mounted.In a particularly preferred embodiment, at least one motor vehicle component, preferably a battery, a coolant compensation container of a motor vehicle cooling system or a separating device for a motor vehicle on-board electrical system, is arranged on a side of the receiving space wall facing away from the receiving space, said component being accessible via the opening through a disassembled venting grid device or a disassembled closure device. As a result, the closure or venting grid device performs a plurality of functions, namely the closure or venting of the receiving space and access to other components arranged below the receiving space.The venting grid device is preferably embodied in multiple parts, wherein the venting grid device has a venting grid screen and a nonwoven element. The ventilation grid screen and the nonwoven element can avoid a rise in pressure in the receiving space, in which the ventilation grid screen is permeable to air through the open regions between the webs and the nonwoven element, and penetration of dirt and moisture into the receiving space through the nonwoven element can be reliably prevented. Alternatively, the venting grid device is embodied in multiple parts, wherein the venting grid device has a venting grid diaphragm and a valve unit with preferably multiple openings, on which is arranged a valve that closes the openings in each case and opens in the event of a pressure increase in the receiving space.In a preferred embodiment, the fleece element is arranged on the ventilation grid screen in a non-detachable manner. In particular, the nonwoven element is welded to the ventilation grid screen.Alternatively, the nonwoven element is arranged on a carrier element, wherein the carrier element is detachably connected to the ventilation grid screen. As a result, the nonwoven element can be exchanged in a cost-effective manner, wherein the carrier element has to be detached from the ventilation grid screen and only the nonwoven element has to be exchanged.An exemplary embodiment of the invention is explained in more detail with reference to the drawings. FIG. 1 shows a cross section of a front region of a motor vehicle, FIG. 2 shows a top view of the front region from FIG. 1 in a perspective view, FIG. 3 ashows a venting grid device in an exploded illustration, and. FIG. 3 bshows a shutter grid device in a plan view.FIGS. 1 and 2 show a front region of a motor vehicle 10, for example of an electric vehicle, wherein a receiving space 20, for example a trunk, is arranged in the front region, in which receiving space objects can be deposited and transported. The receiving space 20 is delimited by a receiving space wall 22 produced in one piece with a carpet 23 fastened thereto, wherein the receiving space wall 22 has two side parts 241, 242, a front wall 26, a rear wall 28 and a base 29. On the side opposite the base 29, the receiving space wall 22 has an engagement opening 30, through which objects can be passed and deposited in the receiving space 20.The engagement opening 30 can be closed in a fluid-tight manner by a front hood 40, wherein the front hood 40 is mounted pivotably on a motor vehicle body 12 of the motor vehicle 10 via two hinges, which are not shown in the figure. The front hood 40 can thus be moved between an open position and a closed position, wherein in FIG. 2 the front hood 40 is shown in its open position and in FIG. 1 the front hood 40 is shown in its closed position.For closing the engagement opening 30 in a fluid-tight manner, a seal 50 is provided on the motor vehicle body 12 which is embodied in a circumferential manner and completely surrounds the engagement opening 30. On the front hood 40, a sealing surface is provided which interacts with the seal 50.The encircling seal 50 seals the receptacle space 20 from the outside environment in a fluid-tight manner in the closed position of the front hood 40, with the result that no moisture and no dirt enter the receptacle space 20 and the articles deposited therein are protected from damage and contamination.Below the receiving space 20 different components, for example a battery 14, are arranged. In order to reach the components 14 below the one-piece receptacle space wall 22, the receptacle space wall 22 has a plurality of, in the present case three, openings 321, 322, 323, which are covered by a cover element 34 in the normal state.The front hood 40 can be designed as required with and without a pedestrian protection adjusting device 60, shown in FIG. 1. The pedestrian protection actuating device 60 usually comprises a pyrotechnic actuator and an airbag, wherein the pedestrian protection actuating device 60 is designed such that, in the event of a front-end collision with a pedestrian, which is detected by a sensor, the pyrotechnic actuator is activated. Gas flows out of the pyrotechnic actuator into the airbag, which inflates and raises the front hood in the hinge region in the vehicle vertical direction and adjusts it by fixing the front hood 40 at the opposite end. The hinges of the front hood 40 are designed accordingly to permit a setting movement. By the adjustment, the front hood 40 serves as an additional crushing zone for the pedestrian.In the event of a pedestrian impact on the front hood 40, which is mounted only pivotably on the motor vehicle body and does not have a pedestrian protection adjusting device 60, the air in the receiving space 20 is compressed and the pressure in the receiving space 20 is increased, wherein the increase in the air pressure in the receiving space counteracts a deformation of the front hood 40 in the event of an impact of a pedestrian and the HIC (Head Injury Criterion) value is increased. In the case of a front hood 40 with a pedestrian protection adjusting device 60, the adjusting of the front hood 40 leads to a fluidic connection between the receiving space 20 and the external environment and to a pressure equalization between the receiving space 20 and the external environment, as a result of which no pressure increase takes place in the receiving space 20.Therefore, depending on whether the front hood 40 is configured with or without the pedestrian protection adjusting device 60, the cover elements 34 are configured as a closure device 38 or as a venting device 36. In the case of a front hood 40 without a pedestrian protection adjusting device 60, at least one of the two openings 321, 322 is covered with a venting device 36, as a result of which, in the event of a pedestrian impact on the front hood 40, venting of the receiving space 20 takes place via the venting device 36 and hence a rise in pressure in the receiving space 20 is avoided. If the size of the opening 321, 322 closed by the venting device 36 is not sufficiently large for rapid venting, both openings 321, 322 are covered by one venting device 36 in each case, so that venting can take place via both openings 321, 322. In the case of a front hood 40 with a pedestrian protection adjusting device 60, the openings 321, 322 are each covered by a closure device 38, since venting of the receiving space 20 takes place in the event of a pedestrian impact on the front hood 40 by adjusting the front hood 40. The opening 323 is closed in all embodiments by a closure device 38 specially designed for this purpose.The closure device 38 is designed as a one-piece plastic plate. The venting device 36 is embodied in multiple parts and has a venting grid screen 361 produced from plastic and a fleece element 363, wherein the fleece element 363 is arranged on a plastic carrier element 362, which is detachably connected to the venting grid screen 361. As a result, a venting can be provided and penetration of dirt into the receiving space 20 through the fleece element 363 can be avoided. The cover elements 34 are releasably locked to the receiving space wall 22, so that the components 14 arranged below the receiving space 20 are accessible via the openings 321, 322, 323.As a result, the components relating to the receiving space 20 can be designed identically for all motor vehicles 10 of a vehicle model and independently of whether a pedestrian protection adjusting device 60 is present or not present, wherein it is merely necessary to distinguish whether a venting device 36 or a closure device 38 has to be mounted.

Claims

Motor vehicle having a receiving space (20) arranged in the front region, which is delimited by a receiving space wall (22), wherein the receiving space wall (22) has an engagement opening (30), a front hood (40), which can be moved between a closed position and an open position, in such a way that the front hood (40) closes the engagement opening (30) in a fluid-tight manner in its closed position, wherein the front hood can be optionally carried out with a pedestrian protection attachment device (60) or without the pedestrian protection attachment device (60), characterized in that at least one opening (321, 322) is provided on the receiving space wall (22), on which opening a cover element (34) is mounted, which, depending on whether the front hood (40) is carried out with or without a pedestrian protection attachment device (60), is designed as a ventilation grid device (36) or as a closure device (38), wherein the venting device (36) and the closing device (38) are designed such that the geometric dimensions relevant for the mounting to the receiving space wall (22) are identical.Motor vehicle according to Claim 1, characterized in that, in the case of a front hood (40) with the pedestrian protection adjusting device (60), the closure device (38) is arranged on the opening (321, 322), and, in the case of a front hood (40) without the pedestrian protection adjusting device (60), the venting grid device (36) is arranged.Motor vehicle according to Claim 1 or 2, characterized in that a first opening (321) and a second opening (322) are provided on the receptacle space wall (22), wherein a venting grid device (36) is arranged in each case on both openings (321, 322) depending on the size of the openings (321, 322), or a venting grid device (36) is arranged on the first opening (321) and a closure device (38) is arranged on the second opening (322).Motor vehicle according to one of the preceding claims, characterized in that the cover element (34) is detachably connected to the receiving space wall (22).Motor vehicle according to Claim 4, characterized in that the cover element (34) is locked releasably to the receptacle space wall (22).Motor vehicle according to Claim 5, characterized in that at least one motor vehicle component (14) is arranged on a side of the receiving space wall (22) facing away from the receiving space (20), said motor vehicle component being accessible via the opening (321, 322) by a removed covering element (34).Motor vehicle according to Claim 6, characterized in that the motor vehicle component (14) is a battery, a coolant compensation container of a motor vehicle cooling system or a separating device for a motor vehicle on-board power supply system.Motor vehicle according to one of the preceding claims, characterized in that the ventilation grid device (36) is of multipart design, wherein the ventilation grid device (36) has a ventilation grid screen (361) and a nonwoven element (363).Motor vehicle according to Claim 8, characterized in that the nonwoven element (363) is non-detachably connected to the ventilation grid screen (361).Motor vehicle according to Claim 9, characterized in that the nonwoven element (363) is welded to the ventilation grid screen (361).Motor vehicle according to Claim 8, characterized in that the nonwoven element (363) is arranged on a carrier element (362), wherein the carrier element (362) is detachably connected to the ventilation grille screen (361).Motor vehicle according to one of Claims 1 to 7, characterized in that the ventilation grid device (36) is of multipart design, wherein the ventilation grid device has a ventilation grid screen (361) and a valve unit.

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