DE102014207555A1 - Arrangement of components in the region of a rear axle of a two-lane, at least partially alternatively drivable motor vehicle, rear axle, pressure vessel and two-lane motor vehicle - Google Patents

Abstract

The invention relates to an arrangement of components in the region of a rear axle of a two-lane, at least partially alternatively drivable motor vehicle, wherein the arrangement has a rear axle and at least one pressure vessel. Here, the rear axle is designed to connect at least some of the wheel-guiding arm of the rear axle and has two longitudinal members and at least one cross member which connects the two longitudinal members. The pressure vessel is designed to store a pressurized fluid and is arranged between the longitudinal members and the cross member of the rear axle. In this case, the rear axle on a contour that is at least partially adapted to a contour of the pressure vessel. Furthermore, the invention relates to a rear axle for a previously described arrangement, a hollow cylindrical pressure vessel and a two-lane motor vehicle with a prescribed arrangement, in particular with a prescribed rear axle and / or with a pressure vessel described above.

Description

The invention relates to an arrangement of components in the region of a rear axle of a two-lane, at least partially alternatively drivable motor vehicle, wherein the arrangement comprises a rear axle and at least one pressure vessel, wherein the rear axle for connecting at least some of the wheel-guiding arm of the rear axle is formed and two, substantially longitudinally extending in the vehicle longitudinal member and at least one, extending substantially in the vehicle transverse direction cross member, which connects the two longitudinal members, wherein the pressure vessel for storing a pressurized fluid is formed and disposed between the longitudinal members and the cross members of the rear axle.

Furthermore, the invention relates to a rear axle for arrangement in the region of a rear axle of a two-lane, at least partially alternatively driven motor vehicle, wherein the rear axle for connecting at least some of the wheel-guiding arm of the rear axle is formed and two, extending substantially in the vehicle longitudinal direction of longitudinal members and at least one, having substantially in the vehicle transverse direction extending cross member which connects the two longitudinal members, wherein the rear axle is designed to connect at least one pressure vessel, which is designed to store a pressurized fluid.

Furthermore, the invention relates to a pressure vessel for storing a pressurized fluid, in particular for an arrangement in a two-lane, at least partially alternatively drivable motor vehicle in the region of a rear axle of the motor vehicle and a two-lane, at least partially alternatively antreibares motor vehicle.

Alternatively drivable motor vehicles, d. H. Motor vehicles which can be driven with an alternative fuel to gasoline or diesel fuel, for example by means of CNG (compressed natural gas), hydrogen, liquefied natural gas (LNG) or liquefied petroleum gas (LPG), are known from the prior art basically known. As a drive unit, they usually have an internal combustion engine, which corresponds in most cases to a conventional gasoline engine. Instead of a gasoline-air mixture, however, a treated alternative gas-air mixture is burned.

In principle, two embodiments of alternatively drivable motor vehicles are distinguished: bivalent and monovalent vehicles. Bivalent vehicles, which are also called bifuel-powered vehicles, can equally be operated with both alternative fuel and gasoline. Automatically or manually by operating a switch, the operation between the provided, different fuels can be changed at any time. As a result, the range of the vehicles is generally comparable to conventionally powered vehicles. Monovalent vehicles, d. H. monofuel or substantially fuel-only vehicles are mainly fueled by alternative fuel, such as CNG; H. with compressed natural gas. They mostly have only a small reserve fuel tank.

Since the alternative fuels, especially CNG, hydrogen, LNG or LPG, at atmospheric atmospheric pressure in comparison, for example, compared to diesel fuel, have a much lower energy density, some of these fuels must be highly compressed, CNG preferably up to about 200 bar, hydrogen preferred with pressures of up to 1000 bar in order to be able to carry a sufficient amount of energy in a reasonable volume in the vehicle for a comparable range.

Since a conventional fuel tank is not designed for such high pressures, the fuel tank is generally not suitable for receiving alternative fuels. For this purpose, rather, appropriate, in particular additional pressure vessel are required. In addition to the pressure vessels are still a corresponding technique, such as pressure regulator, injection and check valves and possibly additional control devices required. As a result, it can lead to space problems, especially in bivalent designed vehicles, as these vehicles usually a reduction of the fuel tank is undesirable, so that no additional space, which could be obtained, for example, by reducing the size of the fuel tank, is available. Rather, in particular, the pressure vessel must be integrated into the available space of a conventionally driven vehicle.

In order to avoid a limitation of the available luggage space, the pressure vessels are underfloor in many, available on the market, alternatively drivable production vehicles, d. H. mounted under the vehicle floor or in the region of the vehicle floor, in particular in the region of a rear axle, and not directly in the luggage compartment, d. H. in the trunk.

Different concepts are known from the prior art, in particular with the aim of appropriate pressure vessels as possible Space-saving, ie space-saving to arrange in a vehicle.

From the DE 20 2004 000 096 U1 For example, it is known to form a pressure vessel as part of a rear axle, wherein the pressure vessel is formed simultaneously as kraftaufnehmender and kraftübertrager part of the chassis or frame of the motor vehicle and for vehicle-side recording of the suspension, such as the wheel-guiding arm is formed, ie for a vehicle-mounted connection the suspension.

From the DE 39 40 250 A1 It is known to arrange a pressure vessel in a trained as a hollow profile profile of a rear axle.

Object of the present invention is thus to provide an alternative, in particular a simpler and more cost-effective and thus more advantageous arrangement of pressure vessels for receiving a pressurized fluid in the region of a rear axle of a two-lane, at least partially alternatively driven motor vehicle, with which the available space is used as optimally as possible and which allows the carrying of the largest possible volume of alternative fuel to achieve the greatest possible range.

This object is achieved by an arrangement with the features of claim 1, by a rear axle with the features of claim 10, a pressure vessel with the features of claim 12 and by a two-lane motor vehicle with the features of claim 13. Advantageous and preferred embodiments of the invention are the subject matter of the further claims and are explained in more detail below. The wording of the claims is incorporated herein by express reference.

An arrangement according to the invention is characterized in that the rear axle carrier has a contour which is at least partially adapted to a contour of the pressure vessel.

In this context, alternatively drivable motor vehicles are understood to mean motor vehicles which can be driven by means of an alternative fuel, in particular by means of CNG (compressed natural gas), LNG (liquefied natural gas), hydrogen or LPG or the like.

In a motor vehicle with an inventive arrangement of the alternative fuel is preferably as a fluid, d. H. stored as a gas or in liquid form in a pressure vessel, d. H. in a container for receiving a pressurized, d. H. is formed with pressure greater than normal pressure, acted upon fluid, in particular in a pressure vessel which is part of an inventive arrangement.

Preferably, the pressure vessel is arranged between the longitudinal members and the cross members of the rear axle, that a longitudinal axis of the pressure vessel extends in the vehicle transverse direction. The pressure vessel may also be arranged in the vehicle longitudinal direction.

Preferably, the pressure vessel is a cylindrical compressed gas cylinder and the contour of the rear axle is at least partially adapted to the contour of the compressed gas cylinder. Such pressure vessels per se are known from the prior art.

By adapted to the pressure vessel contour of the rear axle, especially when the contour is adapted to the contour of conventional gas cylinders, the space next to and / or between the pressure vessels, especially when using pressure vessels in the form of cylindrical gas cylinders, can be optimally used and does not remain unused. Thus, standardized and thus inexpensive compressed gas cylinders can be used as a pressure vessel without a significant space disadvantage arises. Ie. There are no specially adapted and manufactured pressure vessel required for optimal space utilization.

In a preferred arrangement, the pressure vessel is at least partially attached to the rear axle.

The rear axle is preferably formed in a conventional manner known from the prior art for connection to a vehicle body or to an underbody of the motor vehicle and for receiving the wheel-guiding handlebars.

The pressure vessel may be a steel vessel or a steel composite vessel, i. H. a container with a seamless core container (liner) made of chromium-molybdenum steel, which is wrapped with carbon fibers.

However, at least one pressure vessel is particularly preferably a full composite container with a plastic liner wrapped with carbon fibers, since such pressure vessels have a particularly favorable volume to weight ratio.

A pressure vessel, which is provided for storing CNG, is preferably designed such that compressed natural gas to at least 150 bar, preferably to at least 180 bar, in particular compressed to at least 200 bar, can be included.

The volume of the pressure vessel is for a passenger car preferably between 5 l and 100 l, in particular between 10 l and 50 l. For larger vehicles, such as buses and trucks, the volume of a pressure vessel but can also be up to 200 l.

For storing hydrogen, the pressure vessel is preferably designed such that hydrogen can be stored at pressures of at least 500 bar, in particular at pressures of at least 800 bar, more preferably of at least 1000 bar.

Pressure vessels for storing autogas (LPG) are generally designed for significantly lower pressures, preferably for pressures below 10 bar.

Preferably, the pressure vessel is completely connected or mounted on the rear axle. Ie. Preferably, the rear axle is designed as a carrier of the rear axle and as a support for at least one pressure vessel and the pressure vessel is connected only to the rear axle, but not to the body. This has the advantage that the pressure vessel can be preassembled together with the rear axle and the rear axle to form an assembly and can be connected as a whole assembly with the vehicle body or the vehicle body. As a result, the assembly process, in particular the assembly of the pressure vessel, can be considerably simplified. In particular, the assembly processes known today can be retained and it is also possible to manufacture conventional motor vehicles and at least partially alternatively drivable motor vehicles in an assembly line.

In a particularly preferred embodiment, the rear axle is designed to receive via the connection of at least some of the wheel-guiding links of the rear axle and introduced via the connection of the pressure vessel forces, the rear axle is preferably optimized in this regard. Ie. Particularly preferably, the rear axle is designed and dimensioned not only for its original function, namely as a carrier for the wheel guidance of the rear axle and for receiving the wheel guide, but also as a support for the pressure vessel. In particular, the rear axle is adapted or optimized with respect to its strength and / or the crash behavior.

Preferably, the rear axle is designed such that in the event of a crash on the region of the rear axle forces are at least partially supported by the rear axle and / or redirected and / or absorbed, so that at least in some cases, a damage between the longitudinal beams arranged and can be avoided at the rear axle connected pressure vessel.

For this purpose, the rear axle of an inventive arrangement preferably has two cross members. As a result, an improved support of lateral forces introduced into the rear axle carrier can be achieved; in particular, a force acting on one of the longitudinal members can be directed by means of the cross members to the other longitudinal carrier, wherein the cross members in each case form a main load path.

In a preferred embodiment, the contour of the rear axle is adapted to the pressure vessel that in a functional, assembled state of the arrangement with its components at least one wall of the Hinterachsträgers, preferably at least one wall of a cross member and / or a longitudinal member, at least partially corresponding to the outer contour is formed of the pressure vessel, wherein the wall is preferably formed corresponding to the outer contour of a cylindrical compressed gas cylinder.

Particularly preferably, the contour of the rear axle, in particular the correspondingly extending wall, with a certain distance to the outer contour of the pressure vessel, preferably at a constant distance. The distance between the contour of the rear axle and the outer contour of the pressure vessel is preferably as small as possible, but particularly preferably so large that damage to the pressure vessel during assembly or disassembly of the pressure vessel can be safely avoided.

Preferably, in particular, the cross member is at least partially adapted to a contour of the pressure vessel. In particular, such that in a functional, assembled state of the arrangement with its components at least one wall of the cross member at least partially corresponding and at a distance from the outer contour of the pressure vessel, preferably at a constant distance.

Ie. Preferably, the outer contours or the geometry of the rear axle, in particular the outer contours of the cross member, at least partially matched to the outer contour or the geometry of the pressure vessel. As a result, an optimal space utilization can be achieved.

Preferably, the rear axle, in particular the cross member, surrounds the pressure vessel at least partially, in particular with the wall formed corresponding to the outer contour of the pressure vessel.

In particular, when the cross member at least partially surrounds the arranged between the longitudinal members and substantially parallel to the cross member pressure vessel with the corresponding formed to the outer contour of the pressure vessel wall, results in a high degree of utilization of the available space.

In a preferred embodiment, the rear axle, in particular at least one longitudinal member and / or a cross member, at least one reinforcing rib, wherein the reinforcing rib is preferably arranged in the region of the corresponding wall formed to the contour of the pressure vessel and in particular adjacent to this. Preferably, at least one reinforcing rib runs in a zigzag shape in the vehicle transverse direction, based on a functional installation state of the arrangement in a motor vehicle. Ie. In a particularly preferred embodiment, the wall is stiffened by at least one immediately adjacent reinforcing rib.

Particularly preferably, the arrangement comprises at least two adjacently arranged pressure vessels, which are each designed to store a pressurized fluid, wherein the rear axle is designed such that the corresponding formed to the outer contour of the pressure vessel wall, in particular a wall of a longitudinal member and / or a Cross member extending in a functional, assembled state of the assembly with its components at least partially into a volume between the two adjacent pressure vessels inside. This allows a particularly high degree of utilization of the available space can be achieved.

Of course, the arrangement may also comprise more than two pressure vessels. The number of pressure vessels is flexibly expandable, so that the volume of the entrained, alternative fuel can be adjusted accordingly and thus can be set as needed within the available space. Instead of other pressure vessels or in free space and high-voltage storage, batteries or the like can be arranged.

In particular, when the corresponding wall is a wall of a cross member, d. H. In particular, when a cross member of the introduced for the transmission of forces in a longitudinal member on the other side member, at least partially hineinerstreckt into the volume between two pressure vessels and is formed corresponding to at least one outer contour of a pressure vessel, results in an advantageous space utilization, since the volume between two pressure vessels can be used for the main load path and thus remains unused as pressure vessels especially when using arranged in the vehicle transverse direction compressed gas cylinders.

Particularly preferably, in a functional, assembled state of the arrangement with its components at least one reinforcing rib of the rear axle at least partially in a volume between two adjacent pressure vessels, wherein the reinforcing rib is preferably adjacent to the corresponding formed to the outer contour of the pressure vessel wall.

If the arrangement has two pressure vessels arranged adjacently, with one wall each of the rear axle carrier extending at least partially into the volume between the two adjacent pressure vessels, at least one reinforcing rib preferably extends between the two correspondingly formed walls from one wall to the other and connects them, wherein preferably at least one stiffening rib in the vehicle transverse direction zigzag runs, d. H. parallel to a road level. As a result, a particularly efficient stiffening of the rear axle carrier in the region of the walls can be achieved with little space and, in particular, a crash resistance can be improved.

Preferably, the rear axle is formed in a conventional manner, known in the art, in several parts, for example, as in the EP 2 578 473 A1 described. Particularly preferably, the rear axle on at least one cross member, which is screwed disassembled with the two side rails. This allows a simple assembly disassembly of the pressure vessel on the rear axle and thus the inventive arrangement. Furthermore, later the pressure vessel can be easily replaced on the vehicle and without much effort, for example in the event of a defect, without the entire rear axle carrier having to be dismantled.

However, the rear axle carrier is particularly preferably designed in such a way and the pressure containers are arranged in such a way that disassembly of a carrier, in particular of a crossbeam, is not required.

In a preferred embodiment, the rear axle is at least partially known in the art Blechschalenbauweise trained, for example, as in the DE 10 2007 030 929 A1 described. The rear axle can also be completely formed in sheet metal shell construction.

The rear axle can also be made partially or completely from a fiber composite material, which is particularly advantageous for weight reasons, or be made partially or completely by casting, in particular by die-cast aluminum.

Of course, the rear axle can also be composed of different materials or differently manufactured parts, for example, at least one cast node and parts in sheet metal shell construction and / or fiber composite parts and / or from a U-shaped frame made of cast iron with at least one carrier, in particular with a cross member , made of cast iron, in sheet metal construction or of a fiber composite material.

In one embodiment of the invention, the pressure vessel is formed in a hollow cylinder, d. H. Preferably, the pressure vessel has an annular cross-section. A valve for filling and emptying the pressure vessel is then preferably arranged off-center offset from the longitudinal axis of the pressure vessel.

If the pressure vessel is of hollow cylindrical shape, a component, in particular an elongate, narrow component, is passed through the interior of the hollow cylindrical pressure vessel for optimum space utilization.

If the rear axle has a stabilizer, it is particularly preferred for it to pass through the hollow cylindrical pressure vessel. In this case, the stabilizer is preferably designed in several parts, in particular so disassembled that it can be passed through the pressure vessel accordingly.

By such an arrangement of the components in the region of the rear axle of a vehicle, in particular by the use of a hollow cylindrical pressure vessel, a greater range can be achieved compared to an arrangement with a conventional fully cylindrical pressure vessel, which must have a smaller outer diameter due to the space required for a stabilizer if a diameter of the inner wall of the pressure vessel is chosen as small as possible. Because the range is proportional to the volume to which the outer diameter has a greater influence than the inner diameter. Ie. an increase in the inner diameter causes a significantly small reduction of the available volume for receiving alternative fuel as a reduction of the outer diameter by the same amount. Accordingly, an increase in the outer diameter by a certain amount leads to a significantly larger volume increase than a reduction of the inner diameter by the same amount.

An inventive arrangement allows even when using conventional gas cylinders as a pressure vessel optimal space utilization and thus relatively large ranges in alternative operation severely limit the customer benefit, especially without a massive increase in the luggage compartment floor is required, which would lead to a significantly lower luggage compartment volume, and is designed to be as light as possible and nevertheless reaches the strength target values, in particular in the event of a crash, given a suitable design.

The arrangement is suitable or intended both for use in a bivalent and in a monovalent motor vehicle and is particularly suitable for front-wheel drive vehicles.

An inventive rear axle carrier is characterized in that the rear axle carrier has a contour which is at least partially adapted to a contour of a pressure vessel which can be connected to the rear axle carrier.

In this case, the contour is preferably adapted to the pressure vessel such that in a functional, assembled state of the arrangement with its components at least one wall of the rear axle, preferably a wall of a longitudinal member and / or a cross member, at least partially formed corresponding to the outer contour of the pressure vessel, preferably corresponding to the outer contour of a cylindrical or hollow cylindrical compressed gas cylinder.

Preferably, the rear axle is designed such that it at least partially surrounds the pressure vessel in a functional, assembled state of the arrangement with its components, in particular with the corresponding wall formed to the outer contour of the pressure vessel.

The rear axle carrier preferably has at least one reinforcing rib, which is preferably arranged in the region of the wall corresponding to the contour of the pressure vessel and, in particular, adjoins it.

A pressure vessel according to the invention for storing a pressurized fluid is characterized in that the pressure vessel has a hollow cylindrical shape, ie the pressure vessel has an annular cross-section, wherein the valve for filling and emptying the pressure vessel is then arranged eccentrically offset from the longitudinal axis of the pressure vessel.

In order to avoid a "collapse" or an implosion of the inner wall of the pressure vessel, a wall thickness of an inner wall is preferably greater than a wall thickness of an outer wall.

An inventive, two-lane motor vehicle is characterized in that the rear axle and the pressure vessel are arranged according to an inventive arrangement in the motor vehicle.

Particularly preferably, the motor vehicle has a rear axle according to the invention and / or at least one pressure vessel according to the invention.

The motor vehicle can be designed as a bivalent vehicle or as a monovalent vehicle.

These and other features will become apparent from the claims and from the description also from the drawings, wherein the individual features in each case alone or more in the form of sub-combinations in one embodiment of the invention be realized and represent advantageous and inherently protectable versions for which protection is claimed here.

In the following the invention will be further explained with reference to a preferred embodiment, the invention being schematically illustrated in the accompanying drawings. The 1a and 1b show a first embodiment of an arrangement according to the invention in a perspective view in different views, 1c a cut along through the in the 1a and 1b illustrated arrangement along the cutting plane A'A, 2a the rear axle from the 1a to 1c in perspective view in single part representation and 2 B an alternative embodiment of a rear axle according to the invention for an inventive arrangement, also in a perspective view in detail. 3 shows an enlarged view of a section of the rear axle from 2a , 4 also shows an enlarged view of a section of the rear axle 2a but a different section and in a section through a cross member. 5a shows a second embodiment of an inventive arrangement in view from below and 5b a section in the vehicle longitudinal direction by the inventive arrangement 5a , 6a shows a third embodiment of an inventive arrangement in view from below and 6b a section in the vehicle longitudinal direction by the inventive arrangement 6a , In this case, all the features described in more detail can be essential to the invention.

1a and 1b each show in perspective view in a view obliquely from below a first embodiment of an inventive arrangement 100 in the area of a four-link rear axle of a two-lane motor vehicle, which can be driven at least partially by CNG, with one on a floor group 101 a vehicle body of a two-lane motor vehicle mounted rear axle according to the invention 120 as well as four pressure vessels 130 in the form of conventional gas cylinders 130 ,

The four-link rear suspension has four wheel-guiding links on each side of the vehicle 110 on, of which only three are shown recognizable, namely a spring link 110a and a lower wishbone 110b , each with one end on the rear axle 120 are tethered and with the other end to a wheel carrier 111 , which is designed to receive a wheel, and a trailing arm 110c , which also has one end on the wheel carrier 111 is connected. With its other end is the trailing arm 110c but connected to the vehicle body. The fourth link of the four-link rear suspension, which is also a wishbone and the vehicle side on the rear axle 120 and wheel side on the wheel carrier 111 is hinged is not shown.

About the bike-guiding handlebars 110 becomes the wheel carrier 111 kept or led. Furthermore, the rear axle still has a stabilizer 150 on, which extends from one side of the vehicle to the other side of the vehicle and serves for roll compensation.

The rear axle according to the invention 120 has two longitudinal members extending substantially in the vehicle longitudinal direction L. 121 on, as well as three, substantially in the vehicle transverse direction Q extending cross member 122 respectively. 122a . 122b and 122c , in which only the two cross members 122a and 122c are recognizable (cf. 2a ). The crossbeams 122 connect each of the two side members 121 ,

The pressure vessels 130 are designed to store CNG at a pressure of about 200 bar and arranged such that a longitudinal axis of the pressure vessel 130 each essentially in the vehicle transverse direction Q extends. In this embodiment, the two rear pressurized gas bottles 130 ie between the two cross members 122a and 122c arranged compressed gas cylinder 130 as well as the adjacent to this compressed gas cylinder 130 according to the invention in each case via two connections 123 at the rear axle 120 Tied, these two gas cylinders 130 completely on the rear axle 120 are attached. Ie. they are only on the rear axle 120 attached and not in addition to the vehicle body or the vehicle body. The between the cross members 122a and 122c arranged compressed gas cylinder, ie in this embodiment, the rearmost of the four compressed gas cylinders 130 , is directly between the two side members 121 arranged. For fixing the other compressed gas cylinders 130 the arrangement has several struts 103 as well as holder 102 laying down on. The at the rear axle 120 attached pressure vessel 130 are specifically placed in front of the so-called deformation zone rear crash.

The attachment of the compressed gas cylinders is designed so that the compressed gas cylinders 130 can be removed without removing the entire rear axle down and exchanged. For disassembly of compressed gas cylinders 130 are just the holder 102 or the struts 103 to disassemble. As a result, a simple and quick assembly and disassembly of the arrangement 100 and a simple replacement of the pressure vessel 130 possible. In some cases, it may be beneficial to the struts 103 to be replaced by a shear field.

1c shows a section through the in 1a shown embodiment in a sectional view along the cutting plane A'A. In this illustration, it can be clearly seen that the rear axle carrier 120 has a contour which at least partially to a contour of the compressed gas cylinders 130 is adjusted. In particular such that in this embodiment two walls 125 of the rear axle carrier 120 corresponding to the outer contour 131 the one in this illustration right next to the walls 125 arranged compressed gas cylinder 130 are formed. The corresponding to the outer contour 131 the pressure vessel formed walls 125 each through a wall of a front cross member 122b respectively. 122c educated. The front cross member 122b and 122c which are like the rear cross member 122a each form a main load path and for transmission of in a side member 121 initiated forces on the other side members, thereby extending with the walls 125 in a volume between the two adjacent pressurized gas cylinders 130 , ie the volume or the space between the two compressed gas cylinders 130 is for a main load path that runs along the front cross member 122b and 122c runs, used.

To reinforce the walls 125 and thus the cross member 122b and 122c has the rear axle 120 in this area in this embodiment also dreieickförmig, ie forming triangles, or in the vehicle transverse direction Q zigzag running, and to the walls 125 adjacent reinforcing ribs 126 on.

The inventive arrangement 100 thus allows even when using conventional gas cylinders 130 as a pressure vessel optimal space utilization and consequently relatively large ranges in CNG operation, without severely restricting customer benefit, especially without a massive increase in the luggage compartment floor is required, which would lead to a significantly lower luggage compartment volume. In this case, the arrangement according to the invention 100 nevertheless, as easily as possible and also achieves the strength target values, in particular in the event of a crash.

Through the to the compressed gas cylinders 130 adapted contour of the walls 125 or in particular at least one cross member 122b respectively. 122c , the space between the pressure vessels 130 , Especially when using pressure vessels in the form of cylindrical gas cylinders 130 , optimally used and does not remain unused. As a result, the installation space disadvantage of compressed gas cylinders 130 circumvented or used advantageously.

The pressure vessels 130 are preferably formed in lightweight construction, preferably at least one pressure vessel 130 a full composite pressure vessel.

2a shows the rear axle according to the invention 120 from the 1a to 1c in a perspective view obliquely from above in single part representation, in this representation, in particular the frame-like structure of the rear axle 120 with two side rails 121 and a rear cross member 122a and two front cross members 122b and 122c is clearly recognizable. The rear axle carrier 120 is composed of differently manufactured components. The front cross member 122b and 122c are sheet metal parts made of extruded profiles. The rear cross member 122a is, however, designed as an IHU profile ie this cross member 122a has been produced in the hydroforming process, also from an extruded profile.

Since the two front and rear vehicle-side attachment points for the rear axle each not along an axis with the front and rear cross members 122b and 122c respectively. 122a are arranged, the ends of the cross member 122b and 122c each offset to a central region of the cross member 122a . 122b respectively. 122c arranged or the cross member 122a . 122b and 122c each slightly angled.

2 B shows an alternative embodiment of a rear axle 220 for an inventive arrangement. As related to before 2a described rear axle 120 has this rear axle carrier 220 also two longitudinal members extending substantially in the vehicle longitudinal direction L. 221 on, a rear cross member 222a , which is also designed as an IHU profile and two front cross member 122b and 122c , The two front cross members 222b and 222c are with this rear axle carrier 220 but not manufactured in sheet metal construction and in each case with the side rails 221 but they are designed as a common casting, which with the side rails 221 is screwed. For an optimal ratio of stiffness to weight of the rear axle 220 are the two crossbeams 222b and 222c not solid, but have a hollow structure in its interior, by reinforcing ribs 226 is stiffened.

But it is also possible that at least one connection region, in which a side member 221 with a crossbeam 222a . 222b or 222c is merged to form by a casting node and a central part of a cross member 222a . 222b , or 222c or a side member 221 formed by an extruded profile, for example by a corresponding sheet metal part or an IHU profile.

In this illustration are also good the connections 223 to recognize for the compressed gas cylinders. Advantageously, the connection takes place with a known from the prior art "neck-mount system", which, for example, from the US 6,536,722 B2 is known.

3 shows an enlarged view of a section of the rear axle 120 out 2a in the region of the connection of the casting node or the connection of the lower arm 110b at the rear axle 120 , For optimal accessibility to the screw connection of the lower arm 110b with the rear axle carrier 120 has the rear axle 120 a breakthrough 127 on.

4 also shows an enlarged view of a section of the rear axle 120 out 2a However, another section and in a section through the cross member 122b , In this illustration, the reinforcing ribs extending in the vehicle transverse direction Q in particular are zigzag-shaped 126 , this cross member 122b for stiffening or for weight optimization, easily recognizable. Furthermore, in this illustration is well the angled course of the cross member 122b recognizable, which is required to offset the middle part of the cross member 122b to the attachment points for the attachment of the rear axle 120 to compensate for the vehicle body.

5a shows a second embodiment of an inventive arrangement 200 , this arrangement 200 the same invention Hinterachsträger 120 has, as previously based on the 1a to 1c described inventive arrangement 100 ,

The inventive arrangement 200 differs, however, in the size and number and in the manner of the arrangement of the pressure vessel 130 respectively. 130a to 130e , In this second embodiment of an arrangement according to the invention 200 is in addition to the four pressure vessels 130 respectively. 130a to 130d a fifth pressure vessel 130e present, which is also a conventional compressed gas cylinder 130e is and relative to the vehicle longitudinal direction L behind the rear axle 120 is arranged.

As 5b shows is the fifth gas cylinder 130e below the floor group 101 of the vehicle, in particular below a luggage compartment, wherein the diameter of the compressed gas cylinder 130e is chosen such that a luggage compartment floor compared to a conventionally driven vehicle did not have to be raised. The arrangement of the compressed gas cylinder 130e behind the rear axle carrier 120 Although may require additional measures to meet the requirements in the rear crash, but allows a significant increase in range.

Also in this embodiment of an inventive arrangement 200 are the walls 125 the front cross member 122b and 122c of the rear axle carrier 120 to the outer contour 131 of the pressure vessel 130b adapted and run corresponding to this with a constant distance. To reinforce the walls 125 or the cross member 122b and 122c are also reinforcing ribs 126 adjacent to the walls 125 intended.

6a shows a third embodiment of an inventive arrangement 300 , Wherein the arrangement substantially with the in the 5a and 5b shown inventive arrangement 200 matches and only in the arrangement and size of the rearmost pressure vessel 130e respectively. 130f different. Further, in addition a volume reserve 129 intended for a conventional fuel tank, which is above the rear axle 120 is arranged. But here also a high-voltage battery or the like, for example, a battery can be arranged. The rearmost pressure vessel 130f has a larger diameter and thus a larger volume, so that with this arrangement 300 a greater range can be achieved than with the arrangement described above 200 with the pressure vessel 130e , However, had in this third embodiment of an inventive arrangement 300 the luggage compartment floor be raised so that less luggage space volume is available.

Instead of one behind the rear axle 120 arranged pressure vessel 130e respectively. 130f in the form of a compressed gas cylinder, can also be an inventive, hollow cylindrical pressure vessel 130h as he exemplifies in 7 is shown used. As a result, space for narrow elongated components can be created, for example for a stabilizer 150 respectively. 151 ,

For example, a pressure vessel according to the invention 130h at a correspondingly shorter length because of its hollow cylindrical shape or its annular cross-section a little further forward to the rear axle 120 are arranged as a pressure vessel 130e or 130f especially if a stabilizer 150 is designed such that it like the stabilizer 151 in 7 can be passed through the pressure vessel inside.

Of course, a variety of modifications, in particular of structural modifications, to the illustrated embodiment possible without departing from the content of the claims.

LIST OF REFERENCE NUMBERS

100, 200, 300

arrangement

102

bracket

103

strut

110a, 110b, 110c

handlebars

111

wheel carrier

120, 220

Hinterachsträger

130, 130a-130h

pressure vessel

121, 221

longitudinal beams

122, 122a, 122b, 122c, 222a, 222b, 222c

crossbeam

123, 223

Connection pressure vessel on the rear axle

125

Wall rear axle carrier

126

reinforcing ribs

127

breakthrough

128

angle

129

Volume reserve for a fuel tank

131

Outer contour pressure vessel

150, 151

stabilizer

L

Vehicle longitudinal direction

Q

Vehicle transverse direction

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202004000096 U1 [0010]
• DE 3940250 A1 [0011]
• EP 2578473 A1 [0044]
• DE 102007030929 A1 [0046]
• US 6536722 B2 [0081]

Claims (14)

Arrangement ( 100 . 200 . 300 ) of components in the region of a rear axle of a two-lane, at least partially alternatively drivable motor vehicle, wherein the arrangement ( 100 . 200 . 300 ) a rear axle carrier ( 120 . 220 ) and at least one pressure vessel ( 130 . 130a - 130h ), wherein the rear axle carrier ( 120 . 220 ) for connecting at least some of the wheel-guiding handlebars ( 110 ) of the rear axle is formed and two, substantially in the vehicle longitudinal direction (L) extending longitudinal members ( 121 ) and at least one, in the vehicle transverse direction (Q) extending cross member ( 122 ), which supports the two longitudinal members ( 121 ), the pressure vessel ( 130 . 130a - 130h ) is formed for storing a pressurized fluid and between the longitudinal beams ( 121 ) and the cross beams ( 122 ) of the rear axle carrier ( 120 . 220 ), characterized in that the rear axle carrier ( 120 . 220 ) has a contour that at least partially to a contour ( 131 ) of the pressure vessel ( 130 . 130a - 130h ) is adjusted. Arrangement ( 100 . 200 . 300 ) according to claim 1, characterized in that at least one pressure vessel ( 130 . 130a - 130h ) a cylindrical compressed gas cylinder ( 130 . 130a - 130h ) and the contour of the rear axle ( 120 . 220 ) at least partially to the contour ( 131 ) of the compressed gas cylinder ( 130 . 130a - 130h ) is adjusted. Arrangement ( 100 . 200 . 300 ) according to claim 1 or 2, characterized in that the contour of the rear axle ( 120 . 220 ) to the pressure vessel ( 130 . 130a - 130h ) is adapted, that in a functional, assembled state of the arrangement ( 100 . 200 . 300 ) with its components at least one wall ( 125 ) of the rear axle carrier ( 120 . 220 ), preferably at least one wall of a cross member ( 122 ) and / or a longitudinal member ( 121 ), at least partially corresponding to the outer contour of the pressure vessel ( 130 . 130a - 130h ) is formed, wherein the wall ( 125 ) preferably corresponding to the outer contour ( 131 ) a cylindrical compressed gas cylinder ( 130 . 130a - 130h ) is trained. Arrangement ( 100 . 200 . 300 ) according to one of the preceding claims, characterized in that the rear axle carrier ( 120 . 220 ) the pressure vessel ( 130 . 130a - 130h ) at least partially surrounds, in particular with the corresponding to the outer contour ( 131 ) of the pressure vessel ( 130 . 130a - 130h ) formed wall ( 125 ). Arrangement ( 100 . 200 . 300 ) according to one of the preceding claims, characterized in that the rear axle carrier ( 120 . 220 ), in particular at least one longitudinal member ( 121 ) and / or a cross member ( 122 ), at least one reinforcing rib ( 126 ), wherein the reinforcing rib ( 126 ) preferably in the area corresponding to the contour ( 131 ) of the pressure vessel ( 130 . 130a - 130h ) formed wall ( 125 ) is arranged and in particular adjacent to this. Arrangement ( 100 . 200 . 300 ) according to one of the preceding claims, characterized in that the arrangement comprises at least two adjacently arranged pressure vessels ( 130 . 130a - 130h ), each of which is designed to store a pressurized fluid, wherein the rear axle carrier ( 120 . 220 ) is formed such that the corresponding to the outer contour ( 131 ) of the pressure vessel ( 130 . 130a - 130h ) formed wall ( 125 ), in particular a wall ( 125 ) of a longitudinal member ( 121 ) and / or a cross member ( 122 ), in a functional, assembled state of the assembly ( 100 . 200 . 300 ) with its components at least partially into a volume between the two adjacent pressure vessels ( 130 . 130a - 130h ) extends into it. Arrangement ( 100 . 200 . 300 ) according to claim 6, characterized in that the rear axle carrier ( 120 . 220 ) is designed such that in a functional, assembled state of the arrangement ( 100 . 200 . 300 ) with its components at least one reinforcing rib ( 126 ) of the rear axle carrier ( 120 . 220 ) at least partially in a volume between two adjacent pressure vessels ( 130 . 130a - 130h ), wherein the reinforcing rib ( 126 ) preferably to the corresponding to the outer contour ( 131 ) of the pressure vessel ( 130 . 130a - 130h ) formed wall ( 125 ) adjoins. Arrangement ( 100 . 200 . 300 ) according to one of the preceding claims, characterized in that the pressure vessel ( 130h ) is formed hollow cylindrical. Arrangement ( 100 . 200 . 300 ) according to claim 8, that the rear axle of the motor vehicle has a stabilizer ( 150 . 151 ), the inside by the hollow cylindrical pressure vessel ( 130h ) is passed. Rear axle carrier ( 120 . 220 ) to the arrangement ( 100 . 200 . 300 ) in the region of a rear axle of a two-lane, at least partially alternatively drivable motor vehicle, wherein the rear axle carrier ( 120 . 220 ) for connecting at least some of the wheel-guiding handlebars ( 110 ) of the rear axle is formed and two, substantially in the vehicle longitudinal direction (L) extending longitudinal members ( 121 ) and at least one extending substantially in the vehicle transverse direction (Q) Cross member ( 122 ), which supports the two longitudinal members ( 121 ), the rear axle carrier ( 120 . 220 ) for connecting at least one pressure vessel ( 130 . 130a - 130h ), which is designed to store a pressurized fluid and between the longitudinal members ( 121 ) and the cross beams ( 122 ) of the rear axle carrier ( 120 . 220 ), characterized in that the rear axle carrier ( 120 . 220 ) has a contour that at least partially to a contour ( 131 ) one at the rear axle ( 120 . 220 ) attachable pressure vessel ( 130 . 130a - 130h ) is adjusted. Rear axle carrier ( 120 . 220 ) according to claim 10, characterized in that the contour in such a way to the pressure vessel ( 130 . 130a - 130h ) is adapted, that in a functional, assembled state of the arrangement with its components at least one wall ( 125 ) of the rear axle carrier ( 120 . 220 ), preferably a wall ( 125 ) of a longitudinal member ( 121 ) and / or a cross member ( 122 ), at least partially corresponding to the outer contour ( 131 ) of the pressure vessel ( 130 . 130a - 130h ) is formed, preferably corresponding to the outer contour ( 131 ) a cylindrical compressed gas cylinder ( 130 . 130a - 130h ). Pressure vessel ( 130h ) for storing a pressurized fluid, in particular for an arrangement ( 100 . 200 . 300 ) in a two-lane, at least partially alternatively drivable motor vehicle in the region of a rear axle of the motor vehicle, characterized in that the pressure vessel ( 130h ) is formed hollow cylindrical. Two-lane, at least partially alternatively drivable motor vehicle, the motor vehicle a rear axle ( 120 . 220 ) and at least one pressure vessel ( 130 . 130a - 130h ), characterized in that the rear axle carrier ( 120 . 220 ) and the pressure vessel ( 130 . 130a - 130h ) according to an arrangement ( 100 . 200 . 300 ) are arranged according to one of claims 1 to 9 in the motor vehicle. Motor vehicle according to Claim 13, characterized in that the motor vehicle has a rear axle carrier ( 120 . 220 ), which is formed according to one of claims 10 or 11, and / or at least one pressure vessel ( 130h ) formed according to claim 12.

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