Automobile function module circuit

The invention relates to a circuit arrangement, can be arranged for in a motor vehicle, with a voltage supply and / or a control scarf device can be connected functional modules, with the Oberbe handle of claim 1 mentioned features.

State of the art

It is known, in a motor vehicle a plurality arranging of functional modules. This Funktionsmo modules are usually in different groups divided, for example, on the one hand the motor management and on the other a so-called Karos serie electronics can be assigned. furthermore may be provided function modules from Finally, a special equipment of a motor vehicle, such as radio, car phone, navigation system gationssysteme etc. serve. For data exchange and for controlling the individual function modules, it is known, the functional modules of a group with a Bus system to connect, for example, a CAN bus, so that by means of the so-called multiplex technology, which is, a multiple utilization of a conduction path, the controls can be realized. To the individual functional modules together with the for they be able to provide relevant data, it is be known, the individual bus systems in a common Gateway, ie in a computer network of the individual bus systems associated computers together menzuschalten. This gateway accepts beispielswei se the release of the individual bus systems for In formation transmission, or sets Prioritä th transmission of information and / or an Infor mationsaustausches between the information systems firmly.

From IMechE 1989, 213-222, is a derarti ges known gateway. Here, the common gate way in one of a control unit and a Fah rerinformationsmodul existing CPU re alisiert. This has the disadvantage that the central unit relationship regardless of the presence as absence of various function module in the motor vehicle a standardized layout own needs, of a maximum number of possible Function modules corresponds. In particular, the driver information module, must provide all of the ads possibly due to the selected Fahrzeugaus reimbursement are not actually needed. About that addition, it is disadvantageous that the for the realization Gateway in addition to the computer units of Zen traleinheit a computer for the gateway available have to be.

ADVANTAGES OF THE INVENTION

The inventive circuit arrangement with the Claim 1 provides features mentioned contrast the advantage that a flexible adaptation of the central unit to a certain level of equipment a is motor vehicle possible and a common Gateway via the central unit without additional Computer is possible. Characterized in that the central unit with a driver information module, a structural unit forms, wherein the central unit with the Fahrerinfor Automation module is preferably releasably connectable, a first bus system connected to the central unit is a second bus on the driver information module is connected, the gateway through a Ver bunch of the central unit and only the reali driver information module arranged Calculator Siert is, these prior via an interface, preferably a serial port, with each other are connected, it is advantageously possible, by means of in two parts, ie the central unit or the driver information module, available anyway Hosts the gateway functions for all bus systems perceive, said over the expected average Stel le to communicate the computer. To that extent, Thus, in a simple manner to the arrangement of a to additional microcomputer for carrying out the Gateway functions in the central unit and / or the Driver information module are omitted because of Composite of existing in two parts via computer the interface the necessary functions mitüber can take.

give Advantageous embodiments of the invention from those referred to in the dependent claims Wish to paint.

drawing

The invention is described in an execution for example with reference to the accompanying drawings, the cal matically in a block diagram of the present invention Circuitry is explained in more detail.

Description of the embodiment

The figure shows a total of <b>10</b> Marked Circuitry for the connection of too explanatory function modules of a not illustrated Set motor vehicle. The core of the circuit arrangement <b>10</b> is a central processing unit <b>12</b>, from a central electrical module <b>14</b> and a Fahrerinfor Automation module <b>16</b> consists. In a detailed presentation position of the central electrical module <b>14</b> and the driver information module <b>16</b>Such as affecting the presentation ment of individual advertisements and individual electronic or electrical components, was made For the sake of clarity omitted.

The central electrical module <b>14</b> and Fahrerinfor Automation module <b>16</b> are coupled via suitable compounds, For example, latching connections, detachable each other connectable. By the indicated arrows<b>18</b> should be made clear that the central electrical module <b>14</b> with the driver information module <b>16</b> to the Zentralein ness <b>12</b> can be mechanically joined together.

The driver information module <b>16</b> is provided with a first bus system <b>20</b>, For example, a high-speed CAN bus connected to the individual function modules <b>22</b> one connect engine management of the motor vehicle are. The functional modules<b>22</b> For example, an engine injection, ignition, transmission control etc.. To activate the function module <b>22</b> via the bus system <b>20</b> has the driver formation module <b>16</b> a computer unit <b>24</b>, about the a data transfer via the bus system <b>20</b> in general known manner is realized.

At the central electrical module <b>14</b> a second bus system <b>26</b>, For example a CAN bus connected. To the bus system <b>26</b> are individual function modules <b>28</b> the so-called body electronics, as example as lighting units, central locking, ACU location, electric seat adjustment, etc., be Schlos sen. To organize the data transfer on the bus system <b>26</b> has the central electrical module <b>14</b> a computer unit <b>30</b>,

In addition to the mechanical connection of the Zentralelek trikmoduls <b>14</b> with the driver information module <b>16</b> is an electrical connection via a serial or parallel port <b>32</b> provided. The average office <b>32</b> may be formed as a plug connection, wherein the computer units <b>24</b> respectively <b>30</b> ever Weil's a serial or parallel input-output circuit <b>34</b> is assigned, via which a Data Out exchange of computer units <b>24</b> and <b>30</b> about the interface <b>32</b> is organized.

The circuit arrangement shown in the figure <b>10</b> practices the following function:

When used as intended the central unit <b>12</b> is carried out via the computer unit <b>24</b> the driver Informa tion module <b>16</b> an activation of the bus system <b>20</b>. while via the computer unit <b>30</b> the Central electrics module <b>14</b> an activation of the bus system <b>26</b> takes place. By decoupling the bus<b>20</b> and <b>26</b> , a respective optimal data transfer on the respective bus system <b>20</b> and 36 Runaway are leading. Since the bus system<b>20</b> For example, a High-speed CAN bus, that is, via the radio tion module <b>22</b> are much data the engine management element provided with a high repetition rate, is performed by decoupling not influencing the data transfers on the bus system <b>26</b>Wherein the radio tion module <b>28</b> Data with a lower replacement provide refresh rate or receive data. An absolutely necessary exchange of data between individual function modules <b>28</b> the bus system <b>26</b> and function modules <b>22</b> the bus system <b>20</b> via the interface <b>32</b>Through which the computer units <b>24</b> and <b>30</b> communicate with each other. About this Ver binding can hence the gateway function between the bus systems <b>20</b> and <b>26</b> will be realized.

Due to the modular design of the central unit <b>12</b> is a replacement of the central electrical module <b>14</b> and / or the driver information module <b>16</b> without wei teres possible. These modules can then, for example, the actual equipment level of the driving force tool to be adapted in a simple manner. The ever Weil exchanged modules via the interface office <b>32</b>Wherein both the remaining module as also the replaced module course the appropriate input-output circuits <b>34</b> as the computer units <b>24</b> respectively <b>30</b> exhibit, electrically interconnected. Thereby, the necessary data exchange between the bus systems <b>20</b> respectively <b>26</b> and the gateway function in every possible configuration of the central unit <b>12</b> for sure posed.