WO2006103129A1

WO2006103129A1 - Control device

Info

Publication number: WO2006103129A1
Application number: PCT/EP2006/050542
Authority: WO
Inventors: Stefan Seitz; Andreas Schrade; Arne Roesch; Alexander Bareiss
Original assignee: Robert Bosch Gmbh
Priority date: 2005-03-29
Filing date: 2006-01-31
Publication date: 2006-10-05
Also published as: DE102005015768A1

Abstract

The invention relates to a control device (1), especially for a motor vehicle, which comprises a housing section (3), component subassemblies (9, 10) and a cover (4) for covering the housing section (3). The inventive device is characterized in that component subassemblies (9, 10) are provided in or on the cover (4) and are electrically connected to the housing section (3) in a detachable manner via contact elements (8).

Description

control device

STATE OF THE ART

The present invention relates to a control device, in particular for a motor vehicle, having a housing section, component groups and having a cover for covering the housing section.

A previously known structure and associated connection technology for control devices in the automotive industry, such as control units for ABS, TCS, ESP and the like, is characterized by classic contacting methods such as soldering, welding or bonding. Depending on the substrate technology, for example in a hybrid ceramic, today electrical connections are even realized only by bonding. However, this contacting technology also limits the possibility of choosing the mechanical structure of such a device or such a device, since the accessibility of components or the free spaces for the bonding head performing a bonding process limit the design possibilities. Another important criterion in operating the electronics of such control devices is to dissipate the resulting heat.

Here, a relatively large effort is now operated, and the structures are relatively complicated. Typically, a multi-shell plastic housing is provided with a plurality of metallic heat sinks, which transmit the heat through heat conduction to the associated device block via sockets and screws, for example a hydraulic block.

ADVANTAGES OF THE INVENTION

The control device according to the invention, in particular for a motor vehicle, having a housing section, component groups and having a cover for covering the housing section, has the advantage that component groups are arranged in or on the cover and are detachably connected to the housing section via elastic contact elements are. As a result, a simple contacting in the course of a mounting operation is possible without a bonding or other complicated connection technology is used.

According to the invention, power control components are applied to or within a cover with heat-dissipating properties, which transfer their heat loss directly by heat conduction to the cover, which in turn to the environment or to a device block as a heat sink derives. The control components are electrically connected via releasable contact means with a housing portion of the control device, which has further control components. The contact means cooperate with contact portions, the interaction of which advantageously takes place simply during the assembly of the cover. The contact means are contact elements designed as contact springs which are either applied to the control components or their substrate, or are an integral part of the housing and contact the corresponding contact partner on a contact section. This is advantageous in case of housing sections which are produced in MID technology (Molded Interconnected Device) or already inserted metal parts or conductor tracks for the electrical transmission of signals and energy.

A further advantage results from the fact that the simplification of the contacting results in a reduction of the construction of the control device.

A control device, in particular for a motor vehicle, having a housing section for receiving contact paths, component groups, control components and connecting elements and having a cover for covering the housing section is characterized in that component groups and control components are arranged in or on the cover Housing section are releasably connected via elastic contact elements electrically connected. Here, a simplification is that, for example, a substrate of the component groups or control components is applied directly to an example metallic lid, which may be provided simultaneously as a housing component of the control device. This offers an advantageous simple heat dissipation. Furthermore, the components are releasably contacted via contact elements with contact portions of a housing portion, which allows an advantageously simple assembly and disassembly during maintenance.

A further advantage results from the fact that the cover with the substrate introduced therein can be tested separately independently of the entire control device and thus can be produced as a unit per se. Thus, then the housing section with plugs, electrical loads such as coils for solenoid valves, and high performance electronics of 3 to 4 components can be reduced to 2 components.

It is preferred that in each case a free end of a contact element in the assembled state of the control device rests on an associated contact portion, wherein the so-called Kontaktanpresskraft this free end is generated by a force storage element, which is advantageous in that the contact element itself is a spring , In another embodiment, the contact element is acted upon in each case by an elastic force storage element.

For an advantageously simple composition of the control device, it is expedient that the free ends of the contact elements are guided in the assembled state of the control device on the associated contact portions inserted into a guide, wherein the guide of the end by mutually corresponding geometric design of free ends of contact elements and associated Contact sections is formed. In this case, a centering is of particular advantage.

Here, it is also advantageous that initially the housing section is used together with the electrical loads regardless of the lid with the high-performance components and assembled, with its free accessibility is ensured, because the lid with the high-performance components to be contacted can be placed later in the simplest way, the Kontatktierung is simple and without the use of harnesses and connectors executable.

In a preferred embodiment, the cover is formed as a heat sink for the arranged in or on it component groups and control components and is connected to the device block for heat transfer in combination.

A further embodiment provides that the cover receives the housing portion and completely encloses it, wherein outwardly guided connecting elements of the housing portion are formed sealed against the lid. This makes it possible that the heat dissipation of the lid can be done directly by a connection to the device block, whereby the heat resistance of the heat dissipation is reduced and the heat dissipation is more effective.

It is advantageous that the lid with the recorded housing portion is sealed releasably connected to the device block, whereby installation work can be simplified.

In another embodiment, the lid with the recorded housing portion with the device block is inseparably sealed, being achieved by a sealed permanent connection of the lid with the recorded housing portion with the unit block by forming a caulking a particularly simple and intensive sealing and good heat transfer.

In addition, it is of particular advantage that the cover has an electromagnetic shield which is electrically connected to a corresponding potential. Further advantages and features of the invention, the description and the drawings can be removed.

DRAWINGS

The invention will be explained in more detail with reference to the embodiment shown in the figures of the drawing.

It shows:

FIG. 1 is a perspective view of an embodiment of the control device according to the invention;

FIG. Fig. 2 is a longitudinal sectional view of another embodiment similar to Fig. 1;

FIG. 3 is an enlarged detail view of a seal of the control device on a device block; and

FIG. 4 is an enlarged detail view of a contact element and a contact section.

DESCRIPTION OF THE EMBODIMENTS

Fig. 1 illustrates a perspective view of an embodiment of the control device 1 according to the invention, which is detachably mounted on a device block 2 by means of fastening elements 15. The control device 1 consists of a cover 4, which serves to receive a housing section 3, which will be described in more detail below, with a connecting element 5. The device block 2 is in this example a device block of a hydraulic control.

The connecting element 5 in this embodiment is a plug connector which is provided for the electrical connection of control elements and electrical consumers arranged in the control device 1. In this embodiment, the housing portion 3 is almost completely enveloped by the lid 4 to the side with the connector. On this side of the housing portion 3 relative to the lid 4 and the device block 2 is sealed in a suitable manner.

The device block 2 is in the illustrated embodiment, a hydraulic block for a hydraulic control in a motor vehicle, the electric actuators such as electric solenoid coils for valves is actuated. The electronic power components necessary for controlling these actuators are located inside the control device 1 in and / or on the cover 4 and on and / or in the housing section 3.

This is shown in Fig. 2 in a longitudinal sectional view of the control device 1. In this example, the housing section 3, which is trough-shaped, is not enveloped by the cover 4. The lid 4 is fixed in this case on the housing portion 3 so that it covers an overhead side of the housing portion 3.

The housing portion 3 includes contact paths 6, which are designed for example as a stamped grid and / or applied conductor tracks. The connector as an outwardly facing connecting element 5 is electrically connected with its contacts with the contact tracks 6 and with its frame with the housing portion 3.

The housing portion 3 is mounted sealed on the device block 2 in a known manner with a circumferential seal 13. Within its trough-shaped design, the housing section 3 receives electrical loads 11, which in this embodiment are the electromagnetic coils for valves arranged below in the device block 2. These electrical loads 11 are electrically connected to connecting elements 12 with the contact tracks 6 of the housing section 3.

The electrical loads 11 are electrically connected via the contact tracks 6, contact sections 7 and contact elements 8, which are explained in more detail below, to control components 10 and / or component groups 9 and are electrically controlled by them. The control components 10 and / or component groups 9 are flowed through by the power current of the electrical consumers. This creates a certain electrical power loss, due to the high

Power of the electrical load 11, which is converted by the control components 10 and / or component groups 9 in heat, which in turn must be dissipated.

The heat dissipation of the power loss takes place via heat conduction from the control components 10 and / or component groups 9 in the lid 4, in and / or on the inside of these components 9, 10 are mounted with a good heat transfer. For example, they can be fastened to the cover 4 with a heat-conducting adhesive. It is also possible that the substrates of the component 9, 10 are applied directly to the lid 4 in a known manner.

The cover 4 dissipates the heat loss, in part, by way of heat radiation via its surface and partly by heat conduction via metallic contact to the housing section 3 and then into the device block 2 or directly into the device block 2. For this purpose, it is expedient that the cover 4 made a material with good thermal conductivity and good heat radiating ability, for example, a metal. Metallic Wärmeleitblöcke between the cover 4 and the device block 2 and the housing portion 3 are also possible.

The component groups 9 and control components 10, which are arranged in the cover 4, are detachably connected by means of contact elements 8 with contact sections 7 of the housing section 3. In this way, it is possible to connect the cover 4 in a simple assembly step on or with the housing section 3 advantageously quickly. A plugging of electrical connection cables between the component groups 9 and control components 10 and the housing section 3 for connection to the contact tracks 6 is no longer required during assembly, since a contact by the contact elements 8 and contact portions 7 during assembly takes place automatically.

The contact elements 8 are electrically conductive and attached in each case with one end to the component groups 9 and control components 10. At its other end, which may be rounded, for example, they have a suitable contact surface, which cooperates with the respective contact section 7 (see FIG. 4). It is advantageous that the contact sections 7 are part of the contact paths 6 of the housing section 3, wherein the contact tracks 6, for example, as inserted metal parts in the housing section 3 in known MID technology (MID = Molded Interconnect Devices) may be formed. Also, printed conductors according to known printed circuit board technology can be used in different configurations. In this case, it is possible for higher integration of further control components to take place on the housing section 3 due to spatially limited contact sections.

The contact element 8 and the corresponding contact section 7 require to produce a good conductive electrical contact with low contact resistance a certain contact pressure force, which is generated by a force storage element (not shown). This power storage element is formed in the present example by the execution of the contact element 8 as a contact spring with a certain elasticity. When placing the lid 4, the contact elements are stretched by resting on the contact portions 7 of the housing portion 3, so that their spring force thus generated ensures the contact pressure.

When applying the lid 4, it is necessary that the contact elements 8 and the associated contact portions 7 are made composable with a suitable geometric help in making the contact. This is possible, for example, by virtue of the contacting, bent end, as shown in FIG. 4, having a bead which interacts with a bore in the contact section 7. This results in an exact positioning thanks to this centering fe. The resilient contact element 8 simultaneously allows clearance compensation between the cover 4 and the housing portion. 3

The control device 1 can be assembled in conventional forward assembly, without fertilizer connections are used. The cover 4 with the component groups 9 and control components 10 arranged in it can be pre-assembled and can be separately subjected to an electrical functional test during production control.

By this simplified structure of the control device 1 and a reduction of the expense for the attachment of the control device 1 on the device block 2 is made possible. Since the height of the housing portion 3 can no longer interfere with the assembly, because this housing portion 3 is freely accessible independently of this for any work prior to installation of the lid 4, by appropriate shaping of the lid 4, a direct contact point, as already mentioned above, for Device block 2 are created, which Wärmeleitblöcke can be omitted. In this case, other attachment methods such as clamping or caulking (see Fig. 3) are then possible.

As shown in FIG. 3, the lid 4 or a part of the housing section 3 has an edge which is designed such that on the one hand it receives the seal 13 and on the other hand has a fastening edge which is secured by a peripheral edge of the device block 2 Tool is for example clamped clamp-like. Here, an advantageous circumferential attachment and uniform pressure of the seal 13 is achieved. The heat transfer is also improved. A simplified balance between the necessary centering for the contact points and the attachment of the lid 4 is made possible. In this case, the cover 4 made of metal can completely encase the housing section 3, wherein the connector (similar to FIG. 1) is completely peripherally sealed relative to the cover 4 in a known manner.

The invention is not limited to the embodiments described above, but modifiable in a variety of ways.

For example, it is conceivable that the contact elements 8 are fastened with one end to the housing section 3 or are part of its contact paths 6 (MID), wherein the contact sections 7 to be contacted are arranged on the components 9, 10 mounted in the cover 4.

It is also possible to apply further power components to the housing section 3, which are arranged so that their heat-dissipating surface contacts the inside of the cover 4 for heat transfer when mounting the cover 4. The contact elements 8 can also be provided as resilient contact pins with a Kontaktierkrone, as used for the automatic electrical test for printed circuit boards. Since the contact is not made frequently, as is the case with switching contacts, but only once during assembly and occasionally during maintenance and replacement, such contact pins can be designed in a simplified manner.

The cover 4 in metallic design or with appropriate metallization for heat dissipation fulfills an additional function in terms of electromagnetic compatibility (EMC) both as Einstrahlschutz for external sources of interference as well as radiation protection own glitches.

LIST OF REFERENCE NUMBERS

Claims

1. Control device (1), in particular for a motor vehicle, with a housing section (3), component groups (9, 10) and with a cover (4) for covering the housing section (3), characterized in that in or on the cover ( 4) component groups (9, 10) are arranged, which are electrically connected to the housing portion (3) via elastic contact elements (8).

2. Control device (1) according to claim 1, characterized in that in each case a free end of a contact element (8) in the assembled state of the control device (1) rests on an associated contact portion (7), wherein the contact pressure force of this free end generated by a force storage element is.

3. Control device (1) according to claim 2, characterized in that the contact element (8) is a spring.

4. Control device (1) according to claim 1 or 2, characterized in that the contact element (8) is acted upon in each case by an elastic force storage element.

5. Control device (1) according to one of claims 2 to 4, characterized in that the free ends of the contact elements (8) in the assembled state of the control device (1) on the associated contact portions (7) guided in a guide can be used.

6. Control device (1) according to claim 5, characterized in that the guide of the end is formed by mutually corresponding geometric configuration of free ends of contact elements (8) and associated contact sections (7).

7. Control device (1) according to one of claims 1 to 6, characterized in that the cover (4) as a heat sink for in or on it arranged component groups (9) and control components (10) is formed metallic and with the device block ( 2) is in communication for heat transfer.

8. Control device (1) according to claim 7, characterized in that the cover (4) accommodates the housing portion (3) and completely surrounds it, wherein outwardly guided connecting elements (5) of the housing portion (3) relative to the de- diskel (4 ) are formed sealed.

9. Control device (1) according to claim 8, characterized in that the cover (4) with the accommodated housing portion (3) with the device block (2) is releasably sealed.

10. Control device (1) according to claim 8, characterized in that the cover (4) with the accommodated housing portion (3) with the device block (2) sealed is permanently connected.

11. Control device (1) according to claim 10, characterized in that the sealed permanent connection of the cover (4) with the housed housing section (3) with the device block (2) has a caulking.

12. Control device (1) according to one of claims 7 to 11, characterized in that the cover (4) has an electromagnetic shield which is electrically connected to a corresponding potential.