Modular system for a plurality of construction variants of a side sill or of a body of a passenger car

Abstract

The invention relates to a modular system for a plurality of construction variants of a side sill (2) for a body (1) of a passenger car, comprising at least two construction-variant-independent profiles (3, 4) which are formed separately from one another and which have a respective side (S1, S2) with a respective recess (10, 11) and can be connected to one another in order to form the respective construction variant such that, when the profiles (3, 4) are connected to one another, the sides (S1, S2) face one another and the recesses (10, 11) of the profiles (3, 4) form a receptacle (12) of the side sill (2), and comprising at least one construction-variant-specific reinforcement element (7) which is formed separately from the profiles (3, 4) and which selectively can be arranged in the receptacle (12) or is to be left out of the receptacle such that in a first construction variant the reinforcement element (7) is arranged in the receptacle (12) and in a second construction variant the receptacle (12) is free of a construction element formed separately from the profiles (3, 4).

Description

[0001] Modular system for several construction variants of a side sill or body of a passenger car

[0002] The invention relates to a modular system for several construction variants of a side sill for the body of a passenger car. Furthermore, the invention relates to a modular system for several construction variants of the body of a passenger car.

[0003] EP 2 976250 B1 discloses a sill for a vehicle body as a known invention. Furthermore, DE 102017 124 391 A1 discloses a sill component for a sill of a vehicle body. Furthermore, it is known from the

[0004] DE 10 2021 001 103 B4 discloses a sill arrangement for a motor vehicle.

[0005] The object of the present invention is to create a modular system so that several construction variants of a side sill or body of a passenger car can be realized in a particularly simple, time-saving and cost-effective manner.

[0006] This problem is solved according to the invention by a modular system with the features of claim 1 and by a modular system with the features of claim 14. Advantageous embodiments of the invention are the subject of the dependent claims.

[0007] A first aspect of the invention relates to a modular system for several, in particular different, construction variants of a sill for a body, also referred to as a superstructure and preferably designed as a self-supporting body, of a passenger car, also referred to simply as a vehicle, whose interior, also referred to as passenger cell, passenger compartment or cabin, is formed by the body in the fully manufactured state of the passenger car. During a journey, persons such as the driver of the passenger car can be located in the interior. Since the construction variants of the side sill can be realized by means of the modular system according to the first aspect of the invention, several, in particular different, construction variants of the body can be realized.

[0008] The modular system according to the first aspect of the invention comprises at least two cross-variant and separately designed profiles, namely a first profile and a second profile. Each profile has a recess on one side. Looking at each profile individually, the recess is, for example, designed as a depression. The profiles can be connected to each other to form the respective variant of the side sill, also referred to simply as a sill. This means that to produce a first variant and a second variant, the profiles are connected to each other, so that in the respective produced variant, the profiles are joined together. For example, the profiles are joined together by a material bond.For example, the profiles are welded and / or glued together, thus joining them. Alternatively or additionally, the profiles can be joined in another way. When the profiles are joined, as is the case with the respective construction variant (i.e., when fully manufactured), their sides face each other. Therefore, in this joined state, the recesses form a recess for the side sill, i.e., for the respective construction variant of the side sill.This means that in the interconnected state of the profiles, for example, the recess of the first profile forms a first part of the receptacle and the recess of the second profile forms a second part of the receptacle, so that in the interconnected state of the profiles and thus in the respective construction variant, the receptacle is composed of the parts.

[0009] The modular system according to the first aspect of the invention also includes at least one, or exactly one, construction variant-specific reinforcing element, which is formed separately from the profiles. The feature that the profiles are cross-construction variants means that the profiles are used for both the first and the second construction variants, and thus that both the first and second construction variants have the same profiles. The feature that the reinforcing element is construction variant-specific means that, for example, with respect to the first and second construction variants, only one of the construction variants, and in particular only the first construction variant, has the reinforcing element.For this purpose, the reinforcing element can optionally be arranged within the receptacle or omitted from it. In the first design variant, the reinforcing element is arranged within the receptacle. This means that the first design variant of the side sill has the profiles and the reinforcing element arranged within the receptacle, by means of which the profiles, or rather a sill element of the side sill formed by the interconnected profiles, are reinforced. In the second design variant, the receptacle is free of any component separate from the profiles, so that in the second design variant neither the reinforcing element nor any other component separate from the profiles is arranged within the receptacle. In the second design variant as well, the interconnected profiles form the aforementioned sill element, which, again, is not reinforced by the reinforcing element.It is evident that the sill element can optionally be reinforced by the reinforcement element, or the reinforcement element can be omitted. This allows the first design variant to exhibit greater rigidity compared to the second, and the second variant to be lighter than the first. This enables the side sill, or rather the different design variants, to be manufactured according to requirements, allowing for the production of various body styles. For example, the first body style variant includes the first design variant of the side sill, and a second body style variant includes the second design variant of the side sill.

[0010] The invention is based in particular on the following insights and considerations: Different body variants typically require differently adapted side sills due to their varying weights and / or structures. To meet these different requirements, increased material usage, particularly through greater wall thicknesses, is often employed. While this can potentially achieve sufficiently high body rigidity, it can also lead to an undesirably high body weight. In contrast, the invention now makes it possible to design the side sill, and thus the body, to be either particularly rigid or particularly lightweight, thereby enabling the side sill design variants, and thus the body variants, to be implemented according to requirements and thus in a time- and cost-effective manner.Since, in the fully manufactured state of the first construction variant, the reinforcing element is located in the recess and thus within the sill element, the reinforcing element acts, for example, as a core by which the sill element is reinforced in the first construction variant. Compared to the first construction variant, the material usage and therefore costs can be kept low or even reduced in the second construction variant.

[0011] In order to be able to implement the different construction variants of the side sill in a particularly cost-effective and weight-saving manner, one embodiment of the invention provides that the respective profile is designed as an extruded profile.

[0012] Another embodiment is characterized by the fact that the respective profile is formed from a respective first material.

[0013] It has proven particularly advantageous if the first material is a light metal alloy, especially an aluminum alloy. This allows for a particularly lightweight design for both the first and second versions of the side sill. Therefore, it is preferably intended that the respective profile be designed as an extruded aluminum profile.

[0014] In a further, particularly advantageous embodiment of the invention, the reinforcing element is formed from a second material that differs from the first. This allows for particularly effective reinforcement of the sill element in the first, non-second, construction variant.

[0015] In order to be able to reinforce the sill element particularly well in the first construction variant, it is provided in a further embodiment of the invention that the second material is a metallic material.

[0016] Preferably, the metallic material is steel, which allows for particularly advantageous reinforcement of the sill element in the first design variant. The reinforcing element thus functions, for example, as a steel core, by means of which the sill element can be reinforced especially well.

[0017] In order to reinforce the sill element in a particularly weight-efficient manner in the first design variant, a further embodiment of the invention provides that the second material is a fiber-reinforced plastic. This means that the fiber-reinforced plastic has a matrix, also referred to as a plastic matrix, formed from a plastic material, in which reinforcing fibers are embedded. The reinforcing fibers can comprise or be carbon fibers and / or glass fibers. Thus, for example, the fiber-reinforced plastic is a carbon fiber-reinforced or glass fiber-reinforced plastic.

[0018] In order to make the different construction variants particularly cost-effective, a further embodiment of the invention provides that the profiles are made of the same, preferably metallic, material.

[0019] Another embodiment is characterized by the fact that the profiles are identical in construction. This allows for a high number of identical parts, making it particularly cost-effective to produce the different side sill variants.

[0020] In a further, particularly advantageous embodiment of the invention, the reinforcing element is a first reinforcing element. In this embodiment, the modular system includes a second reinforcing element specific to the construction variant, which is formed separately from the profiles and separately from the first reinforcing element and can optionally be arranged in the receptacle or omitted from the receptacle. Thus, in the first construction variant, the first reinforcing element is arranged in the receptacle, and in the first construction variant, the receptacle is free of the second reinforcing element. Preferably, in the first construction variant, the receptacle is free of an additional component provided by the first reinforcing element, which is formed separately from the profiles and separately from the first reinforcing element.In the second design variant, the receptacle is free of any component separate from the profiles, so that in the second design variant neither the first nor the second reinforcing element is arranged in the receptacle, and in the second design variant no other component separate from the profiles is arranged in the receptacle. In a third design variant of the side sill, the second reinforcing element is arranged in the receptacle, and in the third design variant, the receptacle is free of the first reinforcing element. Most preferably, in the third design variant, the receptacle is free of any component provided in addition to the second reinforcing element and separately from the second reinforcing element and separately from the profiles. The preceding and following descriptions regarding the first reinforcing element can readily be applied to the second reinforcing element and vice versa.

[0021] For example, in the first design variant, the first reinforcing element is connected to the profiles, in particular by a material bond and / or a force-fit and / or a form-fit. Furthermore, it is conceivable that in the third design variant, the second reinforcing element is connected to the profiles by a material bond and / or a form-fit and / or a force-fit. This allows the sill element to be advantageously reinforced in the first and third design variants, respectively.

[0022] In order to reinforce the sill element formed by the interconnected profiles in a particularly needs-based manner in both the first and third construction variants, a further embodiment of the invention provides that the reinforcing elements differ from one another in their shapes, particularly on their outer circumference. Alternatively or additionally, it is provided that the reinforcing elements differ from one another in the materials from which they are formed. Alternatively or additionally, it is provided that the reinforcing elements differ from one another with regard to the heat treatment processes to which they have been subjected. For example, one of the reinforcing elements has been subjected to a heat treatment process, while the other has not been subjected to any heat treatment process.Furthermore, it is conceivable that the first reinforcing element was or is subjected to a first heat treatment process and the second reinforcing element to a second heat treatment process that differs from the first heat treatment process.

[0023] Thus, the reinforcement elements differ in their qualities, which means that the sill element can be reinforced in different ways and therefore according to requirements in the first and third construction variants.

[0024] Finally, it has proven particularly advantageous for the respective profile to have several separate hollow chambers within its interior. This allows for a cost-effective and weight-efficient achievement of a significantly high stiffness for the profile itself.

[0025] A second aspect of the invention relates to a modular system for several, in particular different, body variants of a passenger car, wherein the body variants are also referred to as body variants. The modular system according to the second aspect of the invention comprises at least two cross-variant, separately designed profiles, each of which has a recess on one side and can be connected to form a side sill of the body, such that in the connected state of the profiles the sides face each other and the recesses of the profiles form a recess for the side sill.The modular system according to the second aspect of the invention also includes at least one variant-specific reinforcing element, formed separately from the profiles, which can optionally be arranged in the receptacle or omitted from the receptacle. Thus, in a first body variant, the reinforcing element is arranged in the receptacle, while in a second body variant, the receptacle is free of a component formed separately from the profiles. Consequently, the first body variant has the profiles and the reinforcing element arranged in the receptacle, and the second body variant has the profiles but is free of a component formed separately from the profiles and arranged in the receptacle. Therefore, the first body variant has the first variant of the side sill, and the second body variant has the second variant of the side sill.This allows the different body variants to be implemented in a simple, time-saving, and cost-effective manner. In particular, the body variants can be manufactured, for example, depending on the respective weight of each body variant. Advantages and advantageous embodiments of the first aspect of the invention are to be regarded as advantages and advantageous embodiments of the second aspect of the invention, and vice versa.

[0026] Further details of the invention will become apparent from the following description of a preferred embodiment with the accompanying drawings. These show:

[0027] Fig. 1 shows a partial schematic perspective view of a first construction variant of a passenger car body, also referred to as the first body variant;

[0028] Fig. 2 shows a partial schematic perspective view of a first design variant of a side sill, the first design variant of which is used in the first body variant; Fig. 3 shows a schematic cross-sectional view of the first design variant of the side sill;

[0029] Fig. 4 shows a schematic cross-sectional view of a second construction variant of the side sill;

[0030] Fig. 5 shows a schematic cross-sectional view of a third construction variant of the side sill;

[0031] Fig. 6 shows a schematic cross-sectional view of a fourth construction variant of the side sill; and

[0032] Fig. 7 shows a partial schematic perspective view of the third construction variant of the side sill.

[0033] In the figures, identical or functionally equivalent elements are provided with the same reference symbols.

[0034] Fig. 1 shows a partial schematic perspective view of a first body variant of a self-supporting body 1 of a passenger car, also referred to simply as a vehicle, whose interior, also referred to as the passenger cell, passenger compartment, or cabin, is formed by the body 1 in the fully manufactured state of the passenger car. This means that the passenger car, or a first vehicle variant of the passenger car, has the first body variant in its fully manufactured state. The body 1 has two side sills spaced apart from each other in the transverse direction of the passenger car, one of which is visible in Fig. 1 and labeled 2. To manufacture the first body variant of the body 1, a respective first construction variant of the side sill 2 is used.The following describes a modular system by which several different versions of the side sill 2 can be manufactured, namely the first version mentioned, as well as a second version, a third version, and a third version of the side sill 2. To create a second body variant of body 1, the second version of the side sill 2 is used. To create a third body variant of body 1, the third version of the side sill 2 is used, and to create a fourth body variant of body 1, the fourth version of the side sill 2 is used.

[0035] The first design variant of the side sill 2 is shown in Fig. 2. As can be seen from Figs. 2 to 7, the modular system has at least or exactly two cross-design variants, separately formed profiles, namely a first profile 3 and a second profile 4. The characteristic that profiles 3 and 4 are cross-design variants means that the first, second, third, and fourth design variants of the side sill 2 have the same profiles 3 and 4. In this case, the respective profile 3, 4 is an extruded profile made of an aluminum alloy, so that each profile 3, 4 is designed as an aluminum extrusion. Furthermore, it can be seen from Fig. 2 that profiles 3 and 4 are structurally identical, with, for example, profiles 3 and 4 being mirror-symmetrical to each other in the respective design variant of the side sill 2. This can be seen from Fig.2. It is also that the respective profile 3, 4 has several hollow chambers 6 in its respective interior 5, wherein the hollow chambers 6 of the respective profile 3, 4 are separated from each other by partition walls designed as solid bodies. The respective profile 3, 4 is formed in one piece, i.e., as a single unit. This means that the respective profile 3, 4 is formed from a single piece, so that the respective profile 3, 4 is formed by a single-piece body, i.e., formed from a single piece and thus integrally manufactured and thus designed as a monoblock.

[0036] The modular system also features reinforcement elements, separate from profiles 3 and 4, namely a first reinforcement element 7, a second reinforcement element 8, and a third reinforcement element 9. Reinforcement elements 7, 8, and 9 are explained in more detail below. Each profile 3 and 4 has a recess on one side, with the side of profile 3 designated S1 and the side of profile 4 designated S2. The recess on side S1 of profile 3 is designated 10, and the recess on side S2 of profile 4 is designated 11.It is evident that the respective recess 10, 11 of the respective profile 3, 4, arranged on the respective side S1, S2 of the respective profile 3, 4, is designed as a respective indentation of the respective profile 3, 4, arranged on the respective side S1, S2 of the respective profile 3, 4, wherein the respective recess 10, 11 is concavely curved. In the embodiment shown in the figures, the respective recess 10, 11 is semicircular in its respective cross-section. To form the respective construction variant of the side sill 2, the profiles 3 and 4 can be connected or joined together.This means that, in the fully manufactured state of the respective design variant of the side sill 2, the separately formed profiles 3 and 4 are connected to each other in such a way that sides S1 and S2 face each other and that the recesses 10 and 11 form a receptacle 12, also referred to as the overall receptacle. This means that, in the fully manufactured state of the respective design variant of the side sill 2, the recess 10 is a first part of the receptacle 12 and the recess 11 is a second part of the receptacle 12, which is composed of the first and second parts. Thus, in the embodiment shown in the figures, the receptacle 12 has a circular cross-section in the respective design variant.

[0037] Figures 2 and 3 show the first design variant of the side sill 2. Figure 4 shows the second design variant of the side sill 2. Figure 5 shows the third design variant of the side sill 2, and Figure 6 shows the fourth design variant of the side sill 2. As can be seen from Figures 2 and 7, the respective reinforcing element 7, 8, and 9 can optionally be arranged in the receptacle 12 or omitted from the receptacle 12. In the first design variant, the reinforcing element 7 is arranged in the receptacle 12. In the second design variant, the receptacle is free of a component formed separately from the profiles 3 and 4. In the third design variant, the reinforcing element

[0038] In the first design variant, reinforcement element 8 is arranged in the receptacle 12, and in the fourth design variant, reinforcement element 9 is arranged in the receptacle 12. With the exception of reinforcement element 7, no other additional component, separate from profiles 3 and 4 and separate from reinforcement element 7, is arranged in the receptacle 12 in the first design variant. The same applies to the third and fourth design variants. In the third design variant, with the exception of reinforcement element 8, no other additional component, separate from profiles 3 and 4 and separate from reinforcement element 8, is arranged in the receptacle 12, and in the fourth design variant, with the exception of reinforcement element 8, no other additional component, separate from profiles 3 and 4 and separate from reinforcement element 8, is arranged in the receptacle 12.

[0039] 9 no other, further component, separately from profiles 3 and 4 and separately from the reinforcing element 9, is arranged in the receptacle 12.

[0040] In the embodiment shown in the figures, the respective reinforcing element 7, 8, 9 is made of steel, and it is conceivable that the reinforcing elements 7, 8, and 9 are made of the same steel. Furthermore, it would be conceivable that at least two of the reinforcing elements 7, 8, and 9 are made of different materials, in particular different metallic materials, and especially different steels. It would also be conceivable that at least or exactly one of the reinforcing elements 7, 8, and 9 is made of a fiber-reinforced plastic.

[0041] Reinforcing elements 7 and 9 differ, for example, in their wall thicknesses. Reinforcing element 7 has a first wall thickness, and reinforcing element 9 has a second wall thickness, which in this case is greater than the first. It is particularly conceivable that reinforcing elements 7 and 9 are made of the same material, especially the same metallic material, and most specifically the same type of steel. It is evident that reinforcing elements 7 and 8 differ from each other, particularly in their outer circumferences. Furthermore, reinforcing elements 8 and 9 also differ from each other, particularly in their outer circumferences.It can be seen that the reinforcing element 8, viewed in cross-section, has a club- or bone-shaped form and comprises two lateral regions 13, between which a central region 14 of the reinforcing element 8 is arranged, connecting the lateral regions 13 to each other. For example, the lateral regions 13 and the central region 14 are formed integrally, that is, from a single piece. In particular, the reinforcing element 8 is mirror-symmetrical with respect to at least or exactly two planes of symmetry that are perpendicular to each other. The reinforcing element 8 tapers from one of the lateral regions 13 towards the central region 14 and widens again from the central region 14 towards the other of the lateral regions 13. The respective reinforcing elements 7, 9 have a circular cross-section.The reinforcing element 8 has a cross-section that is shaped differently from a circle. Preferably, the respective reinforcing element 7, 8, 9 is connected to the profiles 3 and 4, in particular by a material bond and / or a force bond and / or a form bond.

[0042] Each profile 3, 4 has wall regions adjoining, in particular directly, the respective recess 10, 11, namely a respective first wall region and a respective second wall region, wherein the respective recess 10, 11 of the respective profile 3, 4 is arranged between the respective first wall region of the respective profile 3, 4 and the respective second wall region of the respective profile 3, 4. The first wall regions of the profiles 3 and 4 face each other, and the second wall regions of the profiles 3, 4 also face each other. In particular, the first wall regions of the profiles 3 and 4 are connected to each other, especially directly, and, most importantly, the second wall regions of the profiles 3, 4 are connected to each other, especially directly. For example, the first wall regions are materially bonded to each other, in particular welded and / or bonded together.For example, the second wall sections are materially bonded to each other, in particular glued and / or welded together. Furthermore, it would be conceivable that the first wall sections are force-fitted to each other, in particular bolted together. It would also be conceivable that the second wall sections are force-fitted to each other, in particular bolted together.

[0043] Because profiles 3 and 4 are identical in construction, and because the first, second, third, and fourth versions of the side sill 2 all have the same profiles 3 and 4, a high number of identical parts can be achieved. This allows the different versions of the side sill 2, and thus the different body variants, to be implemented simply, quickly, and cost-effectively. Since the reinforcement elements 7, 8, and 9 can be optionally arranged in or omitted from the receptacle 12, and since the reinforcement elements 7, 8, and 9 differ from one another, particularly in pairs, especially with regard to their mechanical properties, different properties, particularly mechanical ones, can be generated for the side sill 2 versions and thus for the body variants in a simple, cost-effective, and lightweight manner.The construction variants, and therefore the body variants, can differ from each other, particularly with regard to their accident characteristics, so that the accident characteristics can be specifically adjusted or influenced.

[0044] Since, in the embodiment shown in the figures, the respective reinforcing element 7, 8, 9 is arranged in the receptacle 12, in each construction variant, the reinforcing element 7, 8, and 9 is embedded in a sill element 15 formed by the interconnected profiles 3, 4. The respective reinforcing element 7, 8, 9 thus is or functions as a core that is arranged, in particular embedded, in the respective sill element 15. In the second construction variant of the side sill 2 shown in Fig. 4, the receptacle 12, and thus the sill element 15, is free of a component formed separately from the profiles 3 and 4 and arranged in the receptacle 12.Since the sill element 15 is formed by profiles 3 and 4, it is a two-part or, conversely, a multi-part extruded profile, in particular an aluminum extruded profile. In the first, third, and fourth design variants, it is reinforced by the respective reinforcing element 7, 8, 9, and in the second design variant, it is free of a component arranged in the receptacle 12 that is separate from profiles 3 and 4, and thus has a very low weight. Furthermore, it is conceivable that at least two of the reinforcing elements 7, 8, and 9, in particular reinforcing elements 7 and 9, have different grades and, for example, differ from each other with regard to the heat treatment processes to which the reinforcing elements 7 and 9 have been subjected. This allows different, in particular mechanical, properties of the side sill 2 to be adjusted as required.

[0045] Fig. 7 shows a partial schematic perspective view of the third construction variant of the side sill 2, which includes the reinforcing element 8.

[0046] Reference symbol list

[0047] body

[0048] Side skirts

[0049] profile

[0050] profile

[0051] interior

[0052] Hollow chambers

[0053] Reinforcing element

[0054] Reinforcing element Reinforcing element Recess Recess

[0055] Side view

[0056] Mid-range

[0057] Sill element

[0058] Page

[0059] Page

Claims

Patent claims 1. Modular system for several construction variants of a side sill (2) for a body (1) of a passenger car, with at least two cross-construction variant, separately designed profiles (3, 4) which each have a side (S1, S2) with a respective recess (10, 11) and can be connected to each other to form the respective construction variant, such that in the connected state of the profiles (3, 4) the sides (S1, S2) face each other and the recesses (10, 11) of the profiles (3, 4) form a receptacle (12) of the side sill (2), and with at least one construction variant-specific reinforcement element (7) designed separately from the profiles (3, 4), which can optionally be arranged in the receptacle (12) or omitted from the receptacle,so that in one of the construction variants the reinforcing element (7) is arranged in the receptacle (12) and in a second of the construction variants the receptacle (12) is free of a component formed separately from the profiles (3, 4).

2. Modular system according to claim 1, characterized in that the respective profile (3, 4) is designed as an extruded profile.

3. Modular system according to claim 1 or 2, characterized in that the respective profile (3, 4) is formed from a respective first material.

4. Modular system according to claim 3, characterized in that the first material is a light metal alloy.

5. Modular system according to claim 3 or 4, characterized in that the reinforcing element (7) is formed from a second material different from the first material.

6. Modular system according to claim 5, characterized in that the second material is a metallic material.

7. Modular system according to claim 6, characterized in that the metallic material is steel.

8. Modular system according to claim 5, characterized in that the second material is a fiber-reinforced plastic.

9. Modular system according to one of the preceding claims, characterized in that the profiles (3, 4) are made of the same material.

10. Modular system according to one of the preceding claims, characterized in that the profiles (3, 4) are identical in construction.

11. Modular system according to one of the preceding claims, characterized by a construction variant-specific second reinforcement element (8) designed separately from the profiles (3, 4) and separately from the reinforcement element (7) as the first reinforcement element, which can optionally be arranged in the receptacle (12) or omitted from the receptacle (12), such that: - in the first construction variant the first reinforcing element (7) is arranged in the receptacle (12) and the receptacle (12) is free of the second reinforcing element (8); - in the second construction variant, the receptacle (12) is free of a component formed separately from the profiles (3, 4); and - in a third of the construction variants, the second reinforcement element (8) is arranged in the receptacle (12) and the receptacle (12) is free of the first reinforcement element (7).

12. Modular system according to claim 11, characterized in that the reinforcing elements (7, 8) differ from one another in their shapes and / or materials from which the reinforcing elements are formed and / or with regard to heat treatment processes to which the reinforcing elements (7, 8) have been subjected.

13. Modular system according to one of the preceding claims, characterized in that the respective profile (3, 4) has several separate hollow chambers (6) in its respective interior (5).

14. Modular system for several body variants (1) of a passenger car, comprising at least two cross-variant, separately designed profiles (3, 4), each having a side (S1, S2) with a respective recess (10, 11) and being connectable to form a side sill (2) of the body (1), such that in the connected state of the profiles (3, 4) the sides (S1, S2) face each other and the recesses (10, 11) of the profiles (3, 4) form a receptacle (12) of the side sill (2), and comprising at least one variant-specific reinforcing element (7) designed separately from the profiles (3, 4), which can optionally be arranged in the receptacle (12) or omitted from the receptacle (12), such that in a first of the body variants the reinforcing element (7) is arranged in the receptacle (12) and in a second of the Construction variants the intake (12) free from a separate from the profiles (3,4) is a trained component.

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