DE10261630A1 - Carrier module for mounting in a hybrid drive motor vehicle is positioned below driver/passenger compartment - Google Patents

Abstract

The invention relates to a support module for mounting in a motor vehicle, which contains a body floor, the body floor comprising a front body floor (1) extending in the driver / front passenger area and a rear body floor (2) extending in the rear seat area, the front body floor (1 ) is higher than the rear body floor (2). The carrier module is arranged in an area between the front body floor (1) and a floor boundary line (3). Thus, the carrier module can be quickly and easily attached to the body of the motor vehicle and at the same time offers space for several components while at the same time maintaining a stable driving behavior of the motor vehicle.

Description

The invention relates to a carrier module for mounting in a motor vehicle, one above a floor boundary line arranged body floor to an at least partial limitation contains an occupant floor area, the body floor a front body floor extending in the driver / front passenger area and one in the back seat area Includes extending rear body floor, the front body floor higher than the rear body floor is arranged.

Such a carrier module is for holding Units and functional parts, for example as a carrier for a front axle, for a Unit, in particular engine and transmission, and for various ancillary units, in particular Cooler, Auxiliary heating, intercooler (LLK), electromechanical and hydraulic power steering, anti-lock braking system (ABS), differential lock (EDS), electrical control units, and the like, known and counts thus through prior public use to the state of the art. The individual components are part of a module (a so-called Power unit pre-assembly unit) with the associated cable and hose routing summarized. The entire carrier module can be checked for errors before final assembly in the motor vehicle. Due to this modular design, the available space is also optimally used. The carrier module is often located directly below the engine compartment because sufficient space in this area to accommodate the above Components is present.

From the DE 19506963 C1 a motor vehicle substructure with a high body floor, as well as with aggregates and functional parts arranged below the body floor is known. However, this possibility of accommodating the units and functional parts, which is known as the underfloor version, proves to be disadvantageous, since the entire floor area is thus higher, as a result of which the center of gravity of the motor vehicle and the torque center of the motor vehicle are displaced unfavorably, which leads to unstable driving behavior of the motor vehicle. From the FR 02744978 A1 a component arrangement for motor vehicles is known below the body floor. The disadvantage of this is the fact that these components are accommodated in separate, cell-like areas and that this separate arrangement makes assembly and disassembly (for example for maintenance purposes) time-consuming and therefore expensive. The DE 19701571 A1 discloses a modular car with a divided base plate, in which the base plate is divisible and can be reassembled in other versions. The base plate contains a double floor to hold units and functional parts, which are easily accessible from below. In practice, it has proven disadvantageous that this type of accommodation shifts the floor boundary line very far down, which reduces the ground clearance. This can lead to the ground area hitting the road, particularly in the case of unfavorable road conditions. The Japanese patent application summary JP 2000238541 discloses a motor vehicle pillar for reinforcing a vehicle side section, which is used in particular for improved mounting of at least one battery of an electrically driven vehicle. Here, the reinforced receiving area extends from the vehicle, in particular below the driver / passenger area. A disadvantage of this is the resulting shift in the center of gravity of the vehicle and in particular the torque center, which leads to unstable driving behavior of the vehicle. The Japanese patent application summary JP 20011018661 discloses a four-wheel drive vehicle equipped with a converter. The converter is directly connected to a side part, the front side of which is provided with a battery holding part for holding the rear part of a battery on the rear part (rear) of the vehicle. It also proves disadvantageous here that the ground clearance to the roadway is reduced due to this arrangement. The Japanese patent application summary JP 2000344148 discloses a battery module for an electric vehicle, which is arranged in a trough-like receptacle below the vehicle in the area of the driver's seats. The uvanne-like receptacle is arranged in such a way that the forces occurring in the event of a collision press the receptacle into the force-receiving flanges, which absorb collision forces and thereby prevent the tub-like receptacle from falling down. The disadvantage of this is that the torque center of the vehicle is shifted due to the central arrangement of the batteries, which leads to an unstable driving behavior of the vehicle. The Japanese patent application summary JP 009226632 shows a tub-like carrier for batteries, which is mounted under an electrically powered vehicle. The tub-like carrier extends below the entire occupant area from the vehicle. A disadvantage of this is the resulting shift in the vehicle torque center, which leads to an unstable driving behavior of the vehicle. The JP 2001138753 discloses a battery module which is arranged in a height offset below a driver's seat area. The disadvantage of this is that due to the battery module arranged in the height offset, the center of gravity of the vehicle and the torque center are shifted, which leads to unstable driving behavior of the vehicle.

The invention lies against this background based on the task of mounting the carrier module in an area below the body floor in such a way that assembly and disassembly can be carried out quickly and inexpensively, while at the same time maintaining a center of gravity which is favorable for the driving behavior of the vehicle.

This task is accomplished with a carrier module according to the features of patent claim 1 solved. The subclaims concern particularly useful further training the invention.

According to the invention it is proposed that carrier module in a between the front body floor and the floor boundary line extending area is arranged. The advantage is that due to the higher height compared to the rear body floor front body floor gives a free space, which for accommodation of the carrier module suitable is. The carrier module can, for example, range from the front bumper to to a B pillar extend the motor vehicle.

A particularly advantageous embodiment The invention is achieved in that the carrier module is designed to accommodate at least one component. hereby the at least one component can be mounted in the carrier module before and before the final assembly in the motor vehicle with regard to their function and their interaction with other parts are checked. Furthermore can the carrier module for different Drive types can be variably equipped with components. So can quickly and simply components for a vehicle with an electric drive or internal combustion engine or hybrid drive be compiled so that depending on the motor vehicle future Requirement an individual combination of components is possible.

It proves particularly useful that the carrier module by means of fasteners below the motor vehicle with the Motor vehicle is attached. So this can already be done with components provided carrier module especially in the case of customer service, simply by loosening the Fasteners, such as screws, from the motor vehicle solved become. Especially with only minor maintenance work, for example on a battery which is accommodated in the carrier module not the entire pre-assembly unit with front axle and unit to be expanded.

An embodiment has been found as particularly practical, in which the carrier module is a single-shell tub and contains a carrier network. For this the single-shell tub serves to hold and fasten the at least one component, and the stable composite carrier is used for secure attachment to the underside of the motor vehicle. This enables the single-shell tub to be made from a thin-walled material be what an inexpensive Manufacturing enables. As a further advantage, the overall vehicle weight can be reduced become what is noticeable in a lower energy consumption.

It turns out to be special advantageous if the single-shell tub made of sheet metal or plastic is made, because thus a cost reduction and weight saving will be realized.

It’s also helpful if the single-shell tub using the press process or casting process is trained. This carries especially for mass production at a cost reduction at.

Furthermore, it turns out to be special helpful if the single-shell tub as a floor covering for protection against stone chips and moisture is trained. This saves the provision of more Components for encapsulating the front floor area, which also contributes to cost reduction and weight saving.

Another particularly favorable modification is also achieved by using the girder for stiffening the motor vehicle body is formed. Thus, in particular increased torsional stiffness of the motor vehicle. Alternatively, at Maintaining the same stiffening of the motor vehicle too Material savings on previously used components, for example Sill, to be made. This generally leads to one Weight reduction of the entire motor vehicle and conversely to reduced energy consumption.

A particularly useful modification is also achieved by the carrier network for transmission and / or absorption of collision forces occurring in the event of a collision is. This makes the front passenger compartment, which is particularly sensitive to collisions additionally protected, because collision forces forwarded to stiffened body areas. In addition, a part of the collision forces that occur when the carrier assembly absorbed.

The carrier assembly preferably contains at least two main carrier profiles running essentially parallel to one another and at least one substantially perpendicular to the main beam profiles attached secondary beam profile. Due to this H-shaped trained arrangement lets the carrier network with low material costs and low manufacturing costs produce.

Preferably the two main beam profiles attached to a sill of the motor vehicle. This will the carrier network and thus the entire carrier module attached to a particularly rigid component of the motor vehicle. In the event of a collision, collision forces are also diverted to the sill. additionally The mostly massive design of the sills allows plenty of freedom Selection of attachment points so that the main beam profiles can be attached quickly and easily.

Furthermore, it turns out to be special advantageous if a main beam profile on a rigidly formed edge from a tunnel to which itself in the back seat area extending rear body floor is attached. hereby In the event of a collision, additional forces are applied to a rigid area of forwarded to the motor vehicle.

The at least one component preferably contains at least one battery and / or at least one latent heat store and / or an exhaust system and / or a heating and air conditioning device. It turns out it is advantageous that some components, such as the heater and air conditioner, not needs to be accommodated in the cockpit of the passenger compartment. in this connection this results in a larger storage option in the passenger compartment below the cockpit and also better assembly from the heater and air conditioner as particularly advantageous. It is also appropriate that water hoses and Air conditioning lines for heat transfer from the engine to the passenger line not due to an interposed Cross wall bushing have to be interrupted but outside of the motor vehicle in one piece pre-assembled and additionally be checked for leaks can. As a result, the assembly proves to be quick and easy to carry out and maintenance work can also be carried out be reduced, which contributes to cost savings overall.

A particularly useful modification is also achieved by at least one component contains a fuel cell and / or at least one reformer. hereby can these components, which generally take up a lot of space quick and easy in the carrier module pre-assembled and then attached to the vehicle. Moreover can these are particularly susceptible to maintenance Components can be removed from the vehicle quickly and easily.

The invention leaves numerous embodiments to. One of them is to clarify its basic principle shown in the drawing and is described below. This shows in

1 a motor vehicle equipped with the carrier module according to the invention in side view;

2 a motor vehicle equipped with the carrier module according to the invention in plan view;

3 a carrier module composed of a single-shell tub and a carrier assembly;

4 an increase of 2 for a detailed representation of an attachment of the carrier module.

1 and 2 show a motor vehicle equipped with the carrier module in side and top view. An important criterion here is the height offset between a front body floor extending in the driver / front passenger area 1 and a rear body floor extending in the rear seat area 2 , This results in a between the front body floor 1 and a floor gauge 3 extensive space to accommodate additional large components. A hybrid vehicle is shown as an embodiment, in which eight large batteries are exemplified 4 are housed to symbolize a sufficiently large space for the necessary battery capacity. These eight batteries would be practical 4 can be combined into one or two battery blocks. In this embodiment, a latent heat storage is additionally 5 accommodated. This latent heat store is used to preheat the catalytic converter in the event of a cold start. The latent heat storage is also used 5 for general heat supply, since at least with hybrid drives in city traffic the combustion engine and thus the heat source remains switched off. In addition, the latent heat storage 5 for the operation of fuel cells (in electric vehicles) whose function is based on the formation of water. It is important here that the fuel cells must not freeze and that they are therefore dependent on a heat source. An additional space is provided by an exhaust system 6 interrupted with catalyst. As can be seen in this figure, it proves to be advantageous that this free space is not restricted by vehicle wheels, such as in the trunk or engine area, and thus almost the entire vehicle width is used. In a further embodiment, as an alternative to the hybrid vehicle, further component combinations are conceivable, such as utilization of residual heat, heating and air-conditioning device and fuel cells with a reformer. It is advantageous that these components are arranged in a tub-like support frame, that the tub-like support frame can be individually adapted to the component combination depending on the drive type and requirement, and that the tub-like support frame is attached to the body from below regardless of the component combination and the drive type can be added and screwed on. In summary, the carrier module proves to be particularly advantageous for accommodating additional components in the motor vehicle, which can otherwise only be accommodated to a limited extent. These additional components include, for example, a second or more batteries. A second battery can thus be used, for example, to preheat the catalytic converter during a cold start in order to comply with future exhaust gas standards. More batteries 4 are required to operate hybrid drives and so-called starter-generator drives (combination of electric motor and internal combustion engine).

A heating and air conditioning unit is conceivable as an additional component, which, for example, the state of the art is often housed in the cockpit of the passenger compartment. Alternatively, in vehicles with hydrogen drive, the battery is used instead of the components mentioned above 4 , Latent heat storage 5 and heating and air conditioning unit, the installation of a fuel cell is also possible. Alternatively, the space can be used for a reformer, which converts fuel to hydrogen, for example. A combination of fuel cell and reformer is also conceivable.

3 represents a carrier module, which consists of a single-shell tub 7 and a carrier network 8th is composed. The single-shell tub 7 is preferably deep-drawn from sheet metal or plastic or is pressed or cast from these materials. The single-shell tub 7 carries the components listed above, for example ( 4 . 5 . 6 . 7 ) and protects them from stone chips and moisture from below and thus also serves as floor covering (capsule). The carrier network 8th serves to accommodate the single-shell tub 7 In addition to components, it also acts as a stiffener and, in the event of a collision, as a means of transmitting collision forces. The carrier network 8th consists in this embodiment of two main support profiles 9 . 9 ' and two secondary beam profiles 10 . 10 ' , The secondary beam profiles 10 . 10 ' become vertical with the parallel main beam profiles 9 . 9 ' attached. In this embodiment, screws serve as fastening means 11 . 11 ' , which are inserted through a hole provided at the contact points. Alternatively, the profiles can be welded together. At the respective ends of the main beam profiles 9 . 9 ' are also boreholes for additional screws 12 . 12 ' intended. The single-shell tub 7 is designed in such a way that it fits perfectly in the carrier assembly 8th can be engaged. The edge area of the single-shell tub 7 is also provided with boreholes, which correspond to those in the carrier system 8th trained drill holes are congruent. Thus, in this embodiment, all screws can 11 . 11 ' . 12 . 12 ' at the same time through the carrier network 8th and the single-shell tub that is engaged with it 7 be inserted and attached to the underside of the body in corresponding threaded holes.

4 shows an enlarged view of the 2 and illustrates the attachment of the carrier module to the underside of the motor vehicle body. The two main beam profiles 9 . 9 ' are at their outer ends using screws 12 . 12 ' screwed to the sill. In the middle is the front main beam profile 9 ' by means of the screws 11 additionally screwed to a stiffening element of the motor vehicle. In the event of a collision, forces are generated by the two main beam profiles 9 . 9 ' backwards over the screw there 11 ' in the rear floor area 2 headed in the area of the back seat. In addition, two further screws are in this embodiment 13 provided, which are attached to a body area, which is exactly on a very rigid edge from a tunnel to the rear floor area 2 lies. This gives the carrier module an additional firm hold in the event of a collision.

1

front body floor

2

rear body floor

3

Bottom boundary line

4

battery

5

Latent heat storage

6

exhaust system

7

single-shell tub

8th

carrier assembly

9 9 '

Main carrier profile

10 10 '

Joist Profile

11 11 '

screw

12 12 '

screw

13

screw

Claims (16)

Carrier module for mounting in a motor vehicle, which a one above a floor boundary line ( 3 ) arranged body floor to at least partially delimit an occupant floor area, the body floor having a front body floor extending in the driver / front passenger area ( 1 ) and a rear body floor extending in the rear seat area ( 2 ) contains, with the front body floor ( 1 ) higher than the rear body floor ( 2 ) is arranged, characterized in that the carrier module in a between the front body floor ( 1 ) and the floor boundary line ( 3 ) extending area is arranged. Carrier module according to claim 1, characterized in that the carrier module for receiving at least one component ( 4 . 5 . 6 ) is trained. carrier module according to the claims 1 or 2, characterized in that the carrier module by means of fastening means is attached below the motor vehicle with the motor vehicle. Carrier module according to at least one of the preceding claims, characterized in that the carrier module is a single-shell trough ( 7 ) and a carrier network ( 8th ) contains. Carrier module according to at least one of the preceding claims, characterized in that the single-shell trough ( 7 ) to accommodate the at least one component ( 4 . 5 . 6 ) educated and the carrier association ( 8th ) to accommodate the single-shell tub ( 7 ) is trained. Carrier module according to at least one of the preceding claims, characterized in that the carrier assembly ( 8th ) with the single-shell tub ( 7 ) is attached below the motor vehicle with the motor vehicle. Carrier module according to at least one of the preceding claims, characterized in that the single-shell trough ( 7 ) is made of sheet metal or plastic. Carrier module according to at least one of the preceding claims, characterized in that the single-shell trough ( 7 ) is formed by pressing or casting processes. Carrier module according to at least one of the preceding claims, characterized in that the single-shell trough ( 7 ) is designed as floor cladding to protect against stone chips and / or moisture. Carrier module according to at least one of the preceding claims, characterized in that the carrier assembly ( 8th ) is designed to stiffen the motor vehicle body. Carrier module according to at least one of the preceding claims, characterized in that the carrier assembly ( 8th ) is designed for the transmission and / or absorption of collision forces occurring in the event of a collision. Carrier module according to at least one of the preceding claims, characterized in that the carrier assembly ( 8th ) at least two main carrier profiles running essentially parallel to each other ( 9 . 9 ' ) and at least one essentially perpendicular to the main beam profiles ( 9 . 9 ' ) attached secondary beam profile ( 10 . 10 ' ) contains. Carrier module according to at least one of the preceding claims, characterized in that the two main carrier profiles ( 9 . 9 ' ) are attached to a sill of the motor vehicle. Carrier module according to at least one of the preceding claims, characterized in that at least one main carrier profile ( 9 . 9 ' ) on a rigid edge from a tunnel to the rear body floor extending in the rear seat area ( 2 ) is attached. Carrier module according to at least one of the preceding claims, characterized in that the at least one component has at least one battery ( 4 ) and / or at least one latent heat storage ( 5 ) and / or at least one heating and air conditioning unit and / or an exhaust system ( 6 ) contains. carrier module according to at least one of the preceding claims, characterized in that the at least one component has at least one fuel cell and / or contains at least one reformer.