WO2016150598A1

WO2016150598A1 - Gearbox control device for a gearbox of a vehicle

Info

Publication number: WO2016150598A1
Application number: PCT/EP2016/052043
Authority: WO
Inventors: Holger Braun; Uwe Liskow; Martin Kowatsch; Markus Weiss
Original assignee: Robert Bosch Gmbh
Priority date: 2015-03-25
Filing date: 2016-02-01
Publication date: 2016-09-29
Also published as: CN107409473B; EP3275294A1; DE102015205445A1; KR20170131840A; CN107409473A

Abstract

The invention relates to a gearbox control device (10) for a gearbox (44) of a vehicle, comprising: a central module (12) having a carrier plate (18), electronic components (20) arranged on said carrier plate (18) and a housing (22) for said electronic components (20), said carrier plate (18) comprising an opening (36) for receiving a securing means (34) for securing the central module (12) to said gearbox (44); at least one peripheral module (14) which carries additional electrical and/or electronic components (28) of the gearbox control device (10); and at least one flexible conductive foil (16) which connects the central module (12) to the peripheral module (14). The peripheral module (14) comprises an additional carrier plate (26) on which the additional electrical and/or electronic components (28) are arranged, the carrier plate (26) having an additional opening (36) for receiving an additional securing means (34) for securing the peripheral module (14) to the gearbox (44).

Description

description

Transmission control unit for a transmission of a vehicle

Field of the invention

The invention relates to a transmission control device for a transmission of a vehicle.

State of the art

In general, gearbox control units are manufactured as an assembly, which can be later mechanically and electrically connected to the corresponding gear.

In general, a transmission control unit includes a component (such as a microcontroller, a memory, a power output stage, resistors,

Capacitors, etc.) populated substrate or circuit carrier. Among other things, for reasons of space, so-called bare-die components are used for the semiconductor components, which do not have their own housing. The pitch distances of these components can also be very small, which can then be very sensitive to short circuits due to conductive, even very small foreign particles. Therefore, the assembled substrates are usually protected after installation in a housing with gel or poured into plastic.

For equipping the gearbox control units among the above

Conditions are specialized works and / or high investments in

existing works necessary. In addition, expensive and complicated tools are needed, which also has no flexibility

Have variant formation. DE 10 2005 046 826 A1 shows a transmission control unit with a carrier, on which several flexible conductor foils can be laminated, which can serve to contact sensors, plug parts or hydraulic valves.

Disclosure of the invention

Advantages of the invention

Embodiments of the present invention may advantageously enable a gearbox controller to be manufactured, assembled, and / or modified faster and more cheaply.

The invention relates to a transmission control device for a transmission of a vehicle. The transmission is arranged in the drive train of the vehicle and / or may serve to a speed or torque of a

To convert internal combustion engine into a different speed or torque for the wheels of the vehicle. The vehicle may, for example, a

Be car, truck, bus or construction vehicle.

According to one embodiment of the invention, the transmission control unit comprises a central module, which comprises a carrier plate, electronic components arranged on the carrier plate and a housing for the electronic components, wherein the carrier plate has an opening for receiving a

Attachment means to secure the central module to the transmission. A support plate, which may be mechanically rigid, can

For example, be a plastic circuit board, a ceramic plate or a metal plate, or a combination thereof. For example, a printed circuit board on which electrical and / or electronic components are arranged, mounted on a metal plate and / or plastic plate without traces (glued, for example) to form a support plate. The opening in the

Support plate for receiving a fastener may be provided only in a metal plate and / or plastic plate on which a circuit board (without opening) is mounted. The electronic components may include, for example, a microcontroller. Furthermore, the central module can carry a bridge circuit for generating a supply voltage for an electric motor and / or an associated filter circuit.

Further, the transmission control unit comprises at least one peripheral module, the further electrical and / or electronic components of the

Gearbox controller carries, and at least one flexible conductor foil which connects the central module with the peripheral module. It is understood that that

Transmission control unit may include several peripheral modules, which may be connected via one or more flexible conductor foils to the central module. A flexible conductor foil or flex foil may comprise a plurality of conductor tracks which are accommodated between two plastic films.

The peripheral module or modules each include another, their own

Support plate on which the other electrical and / or electronic

Components are arranged, wherein the carrier plate has a further opening for receiving a further fastening means for securing the peripheral module to the transmission. This support plate may also be mechanically rigid and / or be a printed circuit board made of plastic or ceramic. In particular, the transmission control unit for the central module and each peripheral module on its own support plate, which can be separately connected to each other with the transmission.

To connect the central module and the peripheral module to the transmission, the carrier plates have all the openings (such as eyelets, recesses, holes and / or bores) with which attaches the respective module to the transmission with a fastening means in the form of a screw or rivet can be. The modules are due to the flexible conductor foils spatially mutually flexible and changes in the relative position of the modules to each other, for example due to space adjustments in or around the transmission, can be implemented without much difficulty. The arrangement of the modules can be changed, for example, because the location of a sensor changed or another sensor is to be integrated.

In this way, for example, the central module and / or certain peripheral modules can be manufactured in a few specialized locations. Here For example, bare-die placement and subsequent protection of the devices may be accomplished by pouring or a lid that seals directly against the circuit substrate.

The assembly of the modules by means of flexible conductor foils can then take place on site in the countries of the respective end user. It can be dispensed with expensive transport packaging (which must be hermetically sealed, without moisture, without particles, for the transport of open bare-die circuits).

Furthermore, the modular design allows a simpler variant formation, since the individual modules (central module, peripheral module) can be modified separately. It is also possible to offer variants for individual modules that can be combined with each other. For example, different central modules for different maximum currents to supply an electric motor can be designed.

It may also be possible to avoid scraping a complete transmission control unit if the electronics shows a defect during testing. It is only necessary to replace one of the modules.

According to one embodiment of the invention, the housing of the central module comprises a casting compound into which the electronic components are cast. If the housing is formed using the Dam & Fill method, the tool costs are minimized, as no elaborate variant-specific tools are usually required for the manufacture.

Alternatively or additionally, the electronic components can be embedded in a gel or protected with a glued-on lid, a melted lid and / or a lid with a sealing ring.

According to one embodiment of the invention, the peripheral module comprises a housing for the electrical and / or electronic components, which has a casting compound into which the electrical and / or electronic components

Components are cast. Analogous to the central module, the

Components of the peripheral module are protected with a potting housing. According to one embodiment of the invention, the peripheral module comprises a sensor, a plug and / or a contact strip. The sensor can be arranged on the carrier plate of the peripheral module and can be embedded there in a cast housing.

According to one embodiment of the invention, a further peripheral module is connected to the central module by means of a cable. For example, in a connector / connection for an oil pump and / or a plug for the

Powering the transmission control unit, a flexible conductor foil may be unable to conduct enough current. In this case, the flexible conductor foil can be replaced by one or more flexible cables.

According to one embodiment of the invention, the gearbox control unit further comprises a centering plate, to which the carrier plate of the central module and the carrier plate of the peripheral module are attached, in order to position the central module and the peripheral module for attachment to the transmission. The

Support plate may for example be a plastic plate on which the

Carrier plates for transporting and / or positioning the

Transmission control unit are attached to the transmission. For example, a robot can grip the gearbox control unit using the carrier plate and then position it.

According to one embodiment of the invention, the central module only has an opening for attachment to the transmission. It is possible that the central module only has a central opening for receiving a

Fastening means (such as a screw), wherein the opening, for example, surrounded by the housing and / or leads through the support plate. Likewise, it is possible that the peripheral module has only one opening for attachment to the transmission. In this case, that must be

Although gearbox with several fasteners are attached to the transmission, but certain modules (because of their small size) are attached only at one point or only with a fastener.

According to one embodiment of the invention, the opening of the central module for receiving a fastening means is surrounded by a bush, which acts as a barrier for a casting compound when the housing is produced by casting. The socket may be in or above a prior to pouring the components Opening be positioned by the support plate to prevent the still liquid casting compound enters the opening for the fastener.

According to one embodiment of the invention, the socket is supported on the carrier plate. From a head of the fastener (such as a

Screw head) transmitted to the module force is transmitted from the socket to the support plate, which contacts the housing with an opposite side.

According to one embodiment of the invention, the bushing passes through the

Carrier plate through. The socket can also transmit the power of the head directly to the housing.

According to one embodiment of the invention, a head of the

Fastening means supported on the support plate or on the socket and / or a head of the fastening means is at least partially recessed in the socket. The bush may at least partially surround the head to reduce the height of the module. It is also possible that the bush serves only as a barrier for the casting compound and the head of the

Fastener is supported directly on the support plate (possibly with a washer).

Ideas for embodiments of the present invention may be considered, inter alia, as being based on the thoughts and findings described below.

Brief description of the drawings

Embodiments of the invention will now be described with reference to the accompanying drawings, in which neither the drawings nor the description are to be construed as limiting the invention.

Fig. 1A shows a schematic, perspective view of a

Transmission control device according to an embodiment of the invention. FIG. 1B shows a schematic cross section through the transmission control unit from FIG. 1A.

Fig. 2A shows a schematic, perspective view of a

Transmission control device according to another embodiment of the invention.

FIG. 2B shows a schematic cross section through the gearbox control unit from FIG. 2A.

Fig. 3 shows a schematic, perspective view of a

Transmission control device according to another embodiment of the invention.

4 shows a schematic cross section through a central module of a transmission control device according to an embodiment of the invention.

5 shows a schematic cross section through a central module of a transmission control device according to an embodiment of the invention.

6 shows a schematic cross section through a central module of a transmission control device according to an embodiment of the invention.

FIG. 7 shows a schematic cross section through a central module of a transmission control device according to an embodiment of the invention.

8 shows a schematic cross section through a central module of a transmission control device according to an embodiment of the invention.

9 shows a schematic cross section through a central module of a transmission control device according to an embodiment of the invention.

The figures are only schematic and not to scale. Like reference numerals designate the same or equivalent features in the figures.

Embodiments of the invention Fig. 1 A and 1 B show a modular transmission control unit 10, the one

Central module 12 and a plurality of peripheral modules 14 includes, which are connected by means of a flexible conductor foil 16 with the central module 12.

The central module 12 comprises a support plate 18, on which electronic and electrical components 20 are arranged, such as a microcontroller, a bridge circuit for supplying an electric motor, an electrical filter for the bridge circuit, resistors, capacitors, etc. In the central module 12 may also be a sensor integrated, for example, if there are close to the central module 12 speeds, paths or positions and / or pressures to be detected.

The carrier plate 18 may be, for example, a printed circuit board (such as an HDI-PCB, "high density interconnect printed circuit board"), which is equipped with the components 20, such as by gluing, bonding and / or soldering bare-die components and other devices, such as SMD (surface mounted device) devices with their own housings.

Furthermore, the central module 12 comprises a housing 22, which over the

Components 20 is arranged and protects them. For example, the components 20 may be embedded in a molding compound 24 or may be protected from the environment by a cover (which may be affixed) secured to the support plate 18.

A flexible conductor foil 16 may have a flexible carrier layer with conductor track and protective lacquer or may have two cover foils (for example of polyimide), between which electrical conductor tracks are arranged. The flexible one

Conductor films or flex films 16 are electrically connected, for example, on the exposed edge of the carrier plate. A flexible conductor foil 16 can be soldered to a printed circuit board as a carrier plate 18, for example, with iron soldering. The soldering pad transfers heat directly via the closed, upwardly facing other cover sheet on the tracks of the flexible conductor foil 16. Protective tape for the soldering iron (also called thermode), since a cover layer of the flexible conductor film 16 assumes this function. The closed side of the flexible conductor foil 16 can then simultaneously serve as chip protection for the connection point. The flexible conductor foil 16 can additionally be protected around the solder joints by a peripheral adhesive bond per solder joint or for a group of solder joints.

The peripheral modules 14 are electrically contacted to the other end of the respective flexible conductor foil. The peripheral modules can be, for example, a sensor module 14a or a plug-in module, such as a gear plug 14b, an actuator contact strip 14c or a

Oil pump connection 14d, act. The peripheral modules 14 also include a carrier plate 26 on which the respective electrical and / or electronic components 28 are arranged. The support plate 26 may be analogous to the central module 12, a printed circuit board, a plastic plate or a ceramic plate. For a sensor module 14a, these electronic components 28 may include a sensor IC 28a and optional auxiliary circuitry mounted directly on the flexible conductor foil 16 (which is approximately in turn mounted on the carrier plate 26). In the case of a plug-in module 14b, 14c, 14d, the components 28 may comprise a contact strip 28b, electrical contacts 28c and / or an additional circuit.

The components 28 of the peripheral modules 14 may be protected analogously to the central module 12 by a housing 30 which has been generated for example by pouring the components 28 into a casting compound 32. For example, the sensor ICs 28a may be protected from the environment (chips, oil) with a polymeric protection (eg, epoxy resin, plastic, globe top).

The carrier plate 26 may be made of the same plastic as the housing 30. For example, sensor dome of the sensor modules 14a may be pure plastic body, through which the flexible conductor foil 16 is positioned and fixed.

The central module 12 and at least some of the peripheral modules 14 can each be equipped with one or more fastening means 34 (here screws), by means of which they can be positioned and fastened to possibly also spatially branched points of a gearbox. The

Fasteners 34 are guided through openings 36 and screw-on in the respective support plates 18, 26, via which the modules 12, 14 can be attached. It is possible that the central module 12 and at least some of the

Peripheral modules 14 are attached to the transmission via only a fastener 34, such as a screw. The transmission control unit 10 therefore provides very small tolerance chains for the peripheral modules 14, since no fixed connection via an overhanging carrier plate system is necessary. The support plates 18, 26 only need a pre-positioning for

Enable screw-on points. The actual centering of the individual modules 12, 14 to gear components take over the fastening means 24 or optionally additional dowel pins on the modules 12, 14th

The central module 12 may, for example, in a specialized factory

(Cleanroom electronics manufacturing, bare-the processing, gluing and bonding) manufactured, tested and delivered to a module factory, in which a

Contacting the peripheral modules 14 takes place. In the module plant no clean room conditions are necessary. There is also no need for expensive transportation and logistics concepts to ship unprotected bare-die circuits.

As shown in FIGS. 2A and 2B, the transmission controller 10 may include a centering plate 38 that positions the individual modules 12, 14 relative to each other. The centering plate 38 may be a pure plastic component without integrated conductor tracks. At the centering plate 38 or mask, which may comprise a plurality of arms and / or branches, for example, the support plates 18, 26 are attached. The centering plate 38 may be disposed below or above the modules 12, 14. To protect the flexible conductor foils 16 may serve a cover plate 40 which is mounted from above as a protective plate.

Since the individual modules 12, 14 are mechanically flexibly connected, thermo-mechanical stresses between the individual modules 12, 14 are greatly reduced, as may be the case with large-area module circuit boards, stamped grids and assemblies integrated into carrier plates. Each module 12, 14 has its own attachment points. The connection to the neighboring component takes place only via a flex foil (possibly with relief waves) and / or via the centering plate 38, which only takes over the pre-centering for mounting on the transmission component, but not the functional centering, and therefore sufficient clearance between the modules 12, 14 and can provide the centering plate 38. As shown in FIGS. 1 A and 2A, the transmission control unit 10 can also be represented without a centering plate 38. This can be done in one

Pre-positioned transport device to be removed by grippers and attached to gear parts.

FIG. 3 shows that flexible conductor foils 16 can also be replaced by cables 42, for example if the current conductivity of the flexible conductor foil 16 is insufficient. These cables 42 can be electrically contacted at the edge of the carrier plate 18. In Fig. 3 it is shown that a transmission plug module 14 b and a plug module 14 d for an oil pump by means of cable 42 with the

Central module are connected.

4 shows a schematic cross section through the central module 12, with which the connection between the central module 12 and the gear 44 is to be explained. It is possible that one or more of the

Peripheral modules 14 are analogously connected to the transmission 44.

The central module 12 is by means of a single or with multiple screws or comparable releasable or non-detachable connections as fastening means 34 directly to a transmission component, such as a

Hydraulic control plate, mechanically and heat dissipating connected. The

Support plate 18 touches the gear 44 surface. This can lead to an optimal heat connection of the central module 12, since only an air gap or oil gap remains between the carrier plate 18 and the transmission 4.

The support plate 18 and the molded housing 22 or the casting compound 24 each contain a central opening or a hole 36 through which a foot of the fastening means 34 extends. The installation of the central module 12 with a central fastening means counteracts a thermo-mechanical deformation of the module 12, which by different

Thermal expansion coefficient can be caused. In the structure of Fig. 4 (also in Figs. 5 to 9), the central module 12 can move freely at the edge and is not performed in a forced clamping (forced about flatness), which can lead to local overloads inside the module 12 , Thus, a delamination of components 20 on the support plate 18 and / or in the casting compound 24 can be counteracted. In FIG. 4, the head of the fastening means 34 rests directly on the housing 22. Alternatively, a washer may be located between the head and the housing.

In the following FIGS. 5 to 9, the opening 36 is surrounded by a bush 46, which on the one hand can serve as a storage for the head of the fastening means 34, but on the other hand also serves as a dam or barrier for the casting compound 24 of the housing 22. Preferably, the bushing 46 has a similar

Thermal expansion coefficient as the molding compound 24 on to a

Delaminate the sleeve 46 of the housing 22 to prevent. For example, the bushing 46 may be made of duroplastic. But it is also possible that the sleeve 46 is made of an aluminum alloy, which may have a poor adhesion to the casting material 24. In this case, but no shear forces, but the sleeve 46 dissolves after casting from the housing 22.

5, 6, 8 and 9, the head of the fastener 34 is supported on the sleeve 46, while the sleeve 46 in Figs. 5, 8 and 9 on the

Support plate 18 and in FIGS. 6 and 9 supported on the housing 44.

In the embodiments of Figs. 6 and 9, it may be advantageous if the thermal expansion coefficient of the sleeve 46 between the

Thermal expansion coefficient of the housing 22 and the support plate 18 is located.

In Fig. 7, the socket rests on the support plate 18, while the socket 46 is used only as a barrier for the molding compound 24. It is possible that a washer and / or a tinning between the head of the fastener 34 and the support plate 18 is arranged.

In Fig. 9, the sleeve 46 has a cantilevered portion, which can reduce the filling level of the molding compound 24 where only flat components 20 are arranged on the support plate 18.

In FIGS. 7, 8 and 9, the head of the fastening means 34 is at least partially sunk in the bushing 46, for example to reduce the overall height of the central module 12. Finally, it should be noted that terms such as "comprising,""comprising," etc., do not exclude other elements or steps, and terms such as "a" or "an" do not exclude a multitude. Reference signs in the claims are not to be considered as limiting.

Claims

claims

1 . Transmission control unit (10) for a transmission (44) of a vehicle, the

Transmission control unit (10) comprising:

a central module (12) which comprises a carrier plate (18), electronic components (20) arranged on the carrier plate (18) and a housing (22) for the electronic components (20), wherein the carrier plate (18) has an opening (36 ) for receiving a fastener (34) to secure the central module (12) to the gearbox (44);

at least one peripheral module (14) carrying further electrical and / or electronic components (28) of the transmission control unit (10);

at least one flexible conductor foil (16) connecting the central module (12) to the peripheral module (14);

characterized in that

the peripheral module (14) comprises a further carrier plate (26) on which the further electrical and / or electronic components (28) are arranged, wherein the carrier plate (26) has a further opening (36) for receiving a further attachment means (34) to attach the peripheral module (14) to the transmission (44).

2. Transmission control unit (10) according to claim 1,

wherein the housing (22) of the central module comprises a casting compound (24) into which the electronic components (20) are cast.

3. Transmission control unit (10) according to claim 1 or 2,

wherein the peripheral module (14) comprises a housing (30) for the electrical and / or electronic components (28), which has a casting compound (32) into which the electrical and / or electronic components (28) are cast.

4. Transmission control unit (10) according to one of the preceding claims,

wherein the peripheral module (14) comprises a sensor (28a), a plug (28c) and / or a contact strip (28b).

5. Transmission control unit (10) according to one of the preceding claims, wherein a further peripheral module (14b, 14d) by means of a cable (42) to the central module (12) is connected.

6. Transmission control unit (10) according to one of the preceding claims, further comprising:

a centering plate (38) to which the support plate (18) of the central module (12) and the support plate (26) of the peripheral module (14) are fastened to the central module (12) and the peripheral module (14) for attachment to the transmission ( 44).

7. Transmission control unit (10) according to one of the preceding claims,

the central module (12) having only one opening (36) for attachment to the transmission (44); and or

wherein the peripheral module (14) has only one opening (36) for attachment to the transmission (44).

8. Transmission control unit (10) according to one of the preceding claims,

wherein the opening (36) of the central module (12) for receiving a

Fastening means (34) by a bush (46) is surrounded, which in generating the housing (22) by casting as a barrier for a

Casting compound (24) acts.

9. Transmission control unit (10) according to claim 8,

wherein the bush (46) is supported on the support plate (18); and / or wherein the bushing (46) passes through the carrier plate (18).

10. Transmission control unit (10) according to claim 8 or 9,

wherein a head of the fastener (46) is supported on the support plate (18) or on the bushing (46); and or

wherein a head of the fastener (34) is at least partially recessed in the bushing (46).