DE102018116815A1 - Electro-hydraulic unit - Google Patents

Abstract

Electro-hydraulic unit (1) with at least one by means of an electromagnet (2) controlled hydraulic valve (3, 4), at least one volumetric flow source (5) comprising a by means of an electric motor (6) driven hydraulic pump (31), a control unit (7) with a PCB (8) for regulating or controlling a pressure and / or a volumetric flow and / or a direction of rotation of the pump (31) and a control unit (7), the volumetric flow source (8) and the at least one hydraulic valve (8). 3, 4) receiving housing (9), characterized in that a control of the at least one hydraulic valve (3, 4) with the control unit (7) of the volume flow source (5) and a first electrical contact (10) for the at least one hydraulic valve (3, 4) is provided directly on the PCB (8). In addition, a use of PCB (8) with the same layout for a plurality of corresponding electro-hydraulic units is proposed, which are controllable via different control lines (19, 21).

Description

The present invention relates to the electrical control of E-solenoid valves of an electro-hydraulic unit. Such units can be used, for example, to actuate a dual-clutch transmission with two or more clutches or to actuate or control a hybrid transmission in motor vehicles.

Such a unit also comprises at least one volumetric flow source in the form of a hydraulic pump driven by an electric motor, in addition to hydraulic valves controlled by electromagnets (E-solenoid valves). The pump is provided with a control unit in the form of a PCB (Printed Circuit Board) for controlling the pressure and / or the volumetric flow and / or the direction of rotation, wherein signals from speed, pressure and / or temperature sensors and control commands of a possibly existing higher-level control unit are processed. For this purpose, the control unit is connected to at least one control line, which may be formed, for example, in the manner of a cable harness.

In the known electro-hydraulic units must be pulled to connect the E-solenoid valves with the control unit cable, which can be disturbing and represent an increased assembly and contacting costs. In addition, the control unit is regularly integrated in the electro-hydraulic unit. The control lines for the electro-hydraulic unit are not standardized, but may have different connector configuration and / or variants of a harness architecture for different types of vehicles. Therefore, for different types of vehicles electro-hydraulic units must be manufactured with PCBs whose layout is individually adapted to the vehicle type. This results in high development and manufacturing costs.

The object of the invention is therefore to solve the problems described with reference to the prior art at least partially and in particular to provide an electro-hydraulic unit in which no cables have to be pulled to connect the E-solenoid valves in the control unit and the characterized by low development and manufacturing costs.

These objects are achieved with an electro-hydraulic unit according to the features of the independent claim. Further advantageous embodiments of the invention are specified in the dependent claims. It should be noted that the features listed individually in the dependent claims can be combined with each other in any technologically meaningful manner and define further embodiments of the invention. In addition, the features specified in the claims are specified and explained in more detail in the description, wherein further preferred embodiments of the invention are shown.

An electro-hydraulic unit with at least one hydraulic valve controlled by an electromagnet, at least one volumetric flow source comprising a hydraulic pump driven by an electric motor, a control unit with a PCB for regulating or controlling a pressure and / or a volumetric flow and / or a direction of rotation of the pump and a the control unit, the volume flow source and the at least one hydraulic valve receiving housing, wherein a control of at least one hydraulic valve with the control unit of the volume flow source takes place and a first electrical contact for the at least one hydraulic valve directly on the PCB is provided.

The electro-hydraulic unit is used in particular for the actuation of clutches or hydraulic gear actuators for engaging, disengaging or actuating gear elements or for actuating a parking lock. In addition, the electro-hydraulic unit may be, for example, an electric pump actuator. The electro-hydraulic unit has at least one controlled by an electromagnet hydraulic valve, in particular E-solenoid valve, and at least one volume flow source, which comprises a powered by an electric motor hydraulic pump on. Furthermore, the electro-hydraulic unit has a control unit with a PCB (Printed Circuit Board). The PCB is a printed circuit board. The PCB is used to regulate or control a pressure and / or a volumetric flow and / or a direction of rotation of the pump.

The electrical control of the at least one hydraulic valve also takes place with the PCB of the control unit of the volume flow source. In this case, the at least one hydraulic valve is contacted directly on the PCB. For this purpose, a first electrical contact for the at least one hydraulic valve is provided directly on the PCB. The first electrical contact is formed in particular in a first contacting region of the PCB. Furthermore, the first electrical contact may have a plurality of first contact points, for example in the manner of through openings in the PCB for press-fit pins. The press-fit pins may be formed, for example, on a contacting element, which may be, for example, a "lead frame", or a plug. Furthermore, the press-fit pins can be formed on a stamped grid. The at least one hydraulic valve can thus be electrically connected via a press-fit connection to the first electrical contact of the PCB. Advantage of this solution is, inter alia, that one or more large central plug for carrying out the contacting of the gear housing are not required. This eliminates the need for cumbersome wiring. In addition, the course or the "routing" of the press-fit pins or of the stamped grid of the contacting element and / or at least one plug of the PCB for connecting at least one control line can be changed before the press-fitting of the press-fit pins. As a result, the electro-hydraulic unit can be adapted to a harness architecture of different vehicle types, without a large number of different PCBs are required with a customized layout. Thus, the same PCBs can be used for a variety of different vehicle types. This reduces the development and production costs.

A contacting element may be provided for connecting PCB and the at least one hydraulic valve. The contacting element, the z. B. may be a leadframe can be performed by a common housing of the volume flow source and at least one hydraulic valve. As a result, the contacting element can contact the PCB directly.

A first electrical connection between the contacting element and the at least one hydraulic valve can take place with an insulation displacement connection and a second electrical connection between the contacting element and the PCB with a press-fit connection.

The contacting element may comprise a first stamped grid which is at least partially surrounded by a carrier part. The first stamped grid can be a flat metal structure produced by stamping. Through the first stamped grid, a plurality of electrical conductors can be produced in only one manufacturing step. The individual electrical conductors of the first stamped grid can be designed as press-fit pins in the region of the second electrical connection between the contacting element and the PCB. The press-fit pins may have bottlenecks that compress when pressed in to create a preload. The stamped grid can be at least partially surrounded by a carrier part, for example in the manner of a plastic encapsulation. The carrier part may comprise crush ribs for positioning and / or attachment of the contacting element to the housing.

It can be provided in the housing a passage opening for the contacting element and be sealed a gap between the housing and the contacting element by means of a seal or an adhesive. The seal can be, for example, an elastomeric seal and / or the adhesive is a sealing adhesive. This can prevent a working medium from getting to the PCB.

The at least one hydraulic valve can be connected to the first electrical contact via a first control line. In this variant, the at least one hydraulic valve is not arranged (directly) in the housing of the electro-hydraulic unit. The first control line can be designed, for example, in the manner of a cable harness.

The PCB may have a second electrical contact for a second control line and the at least one hydraulic valve may be connected to the second electrical contact of the PCB via the second control line. The second electrical contact is formed in particular in a second contacting region of the PCB. Furthermore, the second electrical contact may have a plurality of second contact points, for example in the manner of through openings in the PCB for press-fit pins. The press-fit pins can be formed, for example, on a plug. Furthermore, the press-fit pins can be formed on a stamped grid of the plug. In this variant too, the at least one hydraulic valve does not have to be arranged in the housing of the electro-hydraulic unit, but can be electrically connected to the PCB via the second electrical contact and the second control line, which may likewise be a type of cable harness.

The PCB may have a second electrical contact for a second control line and at least one printed conductor may be formed on the PCB between the first electrical contact for the at least one hydraulic valve and the second electrical contact for the second control line. Preferably, a plurality of conductor track is formed on the PCB between the first electrical contact and the second electrical contact. The at least one conductor track may be provided in the layout of the PCB between the first electrical contact and the second electrical contact as "routing".

The control unit can process signals from speed and / or pressure and / or temperature sensors and / or control commands of a higher-level control unit. The higher-level control unit may be, for example, a control unit of a motor vehicle.

According to a further aspect of the invention, it is also proposed to use PCBs of the same layout for a large number of electro-hydraulic units according to the invention, the electro-hydraulic units being controllable via different control lines. The different control lines are, in particular, harnesses with different connector configuration and / or harness architecture. In the case of the PCBs, in particular a first electrical contact and a second electrical contact are always arranged at the same position. In addition, before the press-fitting of the press-fit pins, the course or "routing" of press-fit pins or a punched grid of a contacting element and / or at least one plug of the PCB can be changed to connect at least one control line. As a result, the electro-hydraulic unit can be adapted to a harness architecture of different vehicle types, without a large number of different PCBs are required with a customized layout. Thus, the same PCBs can be used for a variety of different vehicle types. This reduces the development and production costs. For further details, reference is made to the description of the electro-hydraulic unit according to the invention.

• 1: eine erste Variante einer elektro-hydraulischen Einheit in einer perspektivischen Darstellung;
• 2: die erste Variante der elektro-hydraulischen Einheit in einer ersten Schnittdarstellung;
• 3: ein Prinzip-Schaltbild der ersten Variante der elektro-hydraulischen Einheit;
• 4: die erste Variante der elektro-hydraulischen Einheit in einer Explosionsdarstellung;
• 5: ein Kontaktierungselement der ersten Variante der elektro-hydraulischen Einheit in einer vergrößerten Darstellung;
• 6: die erste Variante der elektro-hydraulischen Einheit in einer zweiten Schnittdarstellung;
• 7: die erste Variante der elektro-hydraulischen Einheit in einer dritten Schnittdarstellung;
• 8: eine Einpresszone eines ersten Steckers der ersten Variante der elektro-hydraulischen Einheit;
• 9: eine zweite Variante einer elektro-hydraulischen Einheit in einer ersten perspektivischen Darstellung;
• 10: die zweite Variante der elektro-hydraulischen Einheit in einer zweiten perspektivischen Darstellung;
• 11: ein Stanzgitter eines zweiten Steckers der zweiten Variante der elektrohydraulischen Einheit; und
• 12: eine dritte Variante der elektro-hydraulischen Einheit in einer perspektivischen Darstellung.

The invention and the technical environment will be explained in more detail with reference to FIGS. It should be noted that the figures show, but are not limited to, particularly preferred variants of the invention. The same components are provided in the figures with the same reference numerals. They show by way of example and schematically:

• 1 a first variant of an electro-hydraulic unit in a perspective view;
• 2 : the first variant of the electro-hydraulic unit in a first sectional view;
• 3 a schematic diagram of the first variant of the electro-hydraulic unit;
• 4 : the first variant of the electro-hydraulic unit in an exploded view;
• 5 a contacting element of the first variant of the electro-hydraulic unit in an enlarged view;
• 6 : the first variant of the electro-hydraulic unit in a second sectional view;
• 7 : the first variant of the electro-hydraulic unit in a third sectional view;
• 8th a press-in zone of a first connector of the first variant of the electro-hydraulic unit;
• 9 a second variant of an electro-hydraulic unit in a first perspective view;
• 10 : the second variant of the electro-hydraulic unit in a second perspective view;
• 11 a punched grid of a second connector of the second variant of the electro-hydraulic unit; and
• 12 : A third variant of the electro-hydraulic unit in a perspective view.

The 1 shows a first variant of an electro-hydraulic unit 1 in a perspective view from the outside. The electro-hydraulic unit 1 has a housing 9 on, which is an aluminum injection molded case. The housing 9 is in the 1 in the region of a contacting element 11 open. In this area towering the case 9 a first hydraulic valve 3 and a second hydraulic valve 4 , The first hydraulic valve 3 and the second hydraulic valve 4 each have an electromagnet 2 on. At the first hydraulic valve 3 and the second hydraulic valve 4 These are solenoid valves, which are connected via the contacting element 11 with a PCB not to be recognized here 8th the electro-hydraulic unit 1 are electrically connected.

The 2 shows the first variant of the electro-hydraulic unit 1 in the region of the contacting element 11 in a longitudinal section. In the case 9 is a PCB 8th a control unit 7 the electro-hydraulic unit 1 arranged. The PCB 8th has a contacting area 23 with contact points not to be recognized here 24 on. The first hydraulic valve 3 with the electromagnet 2 are about the contacting element 11 with the PCB 8th electrically connected. Thus, an integrated valve contact is provided. The contacting element 11 enters through the housing 9 out to the first hydraulic valve 3 and second hydraulic valve 4 where a first gap 17 in a passage opening 16 of the housing 9 by means of a seal 18 , For example, in the manner of an elastomeric seal, or an adhesive is sealed so that no dirt or a working medium in the housing 9 to the PCB 8th can penetrate. The housing 9 is also with a cover 26 locked.

The 3 shows a schematic diagram of the first variant of the schematically shown with a dashed line electro-hydraulic unit 1 in a component 27 a drive train of a motor vehicle, not shown here. At the component 27 For example, it can be a Transmission, a parking brake of a transmission and / or a drive unit act. The electro-hydraulic unit 1 has the control unit 7 with a PCB 8th on. The PCB 8th the control unit 7 is on the one hand with an electric motor 6 and on the other hand via the contacting element 11 with the first hydraulic valve 3 with a first electric drive 29 (electromagnetic valve) and the second hydraulic valve 4 with a second electric drive 30 (electromagnetic valve) electrically connected. The electro-hydraulic unit 1 can also do more than the two hydraulic valves 3 . 4 exhibit. The contacts between the PCB 8th and the electric motor 6 as well as the PCB 8th and the hydraulic valves 3 . 4 are each with a seal 18 sealed, so no dirt or a medium in the housing 9 to the PCB 8th can penetrate. The electric motor 6 drives a pump 31 a volumetric flow source 5 at. The pump 31 the volumetric flow source 5 in turn supplies a hydraulic connection 32 , among other things, by means of hydraulic valves 3 . 4 acts. A first taker 33 and a second taker 34 are as hydraulically operated elements to the hydraulic interconnection 32 connected. The electro-hydraulic unit 1 can also do more than the two takers 33 . 34 exhibit. The takers 33 . 34 can be, for example slave cylinder to actuation of clutches or hydraulic gear plate for inserting, laying out or operating gear elements or for actuating a parking brake. The PCB 8th has a first connector 28 on, by means of which the PCB 8th via a first control line not shown here 19 , For example, in the manner of a wiring harness, with a higher-level control unit or control unit of the motor vehicle and / or a power supply also not shown here is connectable. Through the control unit 7 are the electric motor 6 the volumetric flow source 5 and the hydraulic valves 3 . 4 controllable.

The 4 shows the first variant of the electro-hydraulic unit 1 in an exploded view. To recognize is among other things the housing 9 and the PCB 8th at which the electric motor 6 is attached. The electro-hydraulic unit 1 has a first lid 25 with a part for the hydraulic circuit not shown here 32 or commutation and a pump interface. Furthermore, the hydraulic valves 3 . 4 with over the contacting element 11 with the PCB 8th connected. For this purpose, the contacting element 11 a first punched grid 14 on top of that, with one directly on the PCB 8th trained first electrical contact 10 in the area of the contact area 23 the PCB 8th with the PCB 8th electrically connected. The first electrical contact 10 the PCB 8th has a plurality of first contact points 24 on that as through holes in the PCB 8th are formed. The first electrical contact 10 has a first contacting configuration in the form of a first hole pattern. In addition, the PCB points 8th one directly on the PCB 8th trained second electrical contact 20 for the first connector 28 on. The second electrical contact 20 the PCB 8th has a plurality of second contact points 37 on that as through holes in the PCB 8th are formed. The second electrical contact 20 has a second contacting configuration in the form of a second hole pattern. On the PCB 8th is at least one trace 22 between the first electrical contact 10 and the second electrical contact 20 educated. In particular, the at least one conductor track 22 in the layout of the PCB 8th as a "routing" between the first electrical contact 10 and the second electrical contact 20 intended. The hydraulic valves 3 . 4 are also through an opening 36 in the case 9 can be used, with the opening 36 through a second lid 35 is closable. The second lid 35 can be formed for example as a stamped part and / or deep-drawn part. In addition, the second lid 35 have a sealing adhesive. Through the second lid 35 of the housing 9 can add additional applications to the electro-hydraulic unit 1 be made and / or potential problems due to corrosion of the electrical contacting of the hydraulic valves 3 . 4 be resolved. An interface between the first connector 28 and the cover 26 is sealable with a seal or sealing adhesive.

The 5 shows the contacting element 11 the first variant of the electro-hydraulic unit 1 in an enlarged view. The contacting element 11 includes the stamped grid 14 and a carrier 15 , in which the punched grid 14 partially poured. At the carrier 15 this is a plastic extrusion. On the carrier 15 are a plurality of quince ribs 38 formed, the positioning or attachment of the contacting element 11 on the housing 9 serve.

The 6 shows the first variant of the electro-hydraulic unit 1 in a second sectional view along the contacting element 11 , A first electrical connection 12 between the first punched grid 14 of the contacting element 11 and the hydraulic valves 3 . 4 is designed as insulation displacement connection. A second electrical connection 13 between the first punched grid 14 of the contacting element 11 and the PCB 8th is designed as a press-in connection.

The 7 shows the first variant of the electro-hydraulic unit 1 in a third sectional view along the contacting element 11 , It can be seen here that the ends of the first stamped grid 14 in the range of the second electrical connection 13 as press-fit pins in the as Through holes trained contact points 24 of the first electrical contact 10 the PCB 8th are pressed. The ends of the first punched grid 14 can be in the range of the second electrical connection 13 Have needle tube, which are pressed together by the press-fitting and thereby generate a bias. A circumferential first gap 17 between the contacting element 11 and the housing 9 and a circumferential second gap 39 between the case 9 and the cover 26 can be sealed with a gasket or with sealing adhesive.

The 8th shows a first press-in zone 40 of the first connector 28 the first variant of the electro-hydraulic unit 1 , The first plug 28 has a second punched grid 41 on, whose ends are in the first press-in zone 40 in the second electrical contact 20 the PCB 8th are einpressbar. At the first plug 28 it may be, for example, a multi-pin connector. To the plug 28 is a schematically illustrated here first control line 19 for the electro-hydraulic unit 1 connected.

The 9 shows a second variant of an electro-hydraulic unit 1 in a first perspective view. The second variant of the electro-hydraulic unit 1 differs from the first variant of the electro-hydraulic unit 1 in that the hydraulic valves, not shown here 3 . 4 not in the case 9 integrated, but via a second connector 42 with the first electrical contact 10 the PCB 8th are electrically connected. The second variant of the electro-hydraulic unit 1 thus has a first connector 28 for controlling and / or powering the electro-hydraulic unit 1 and a second plug 42 for the control of the hydraulic valves 3 . 4 on. To the first connector 28 is a schematically illustrated first control line 19 for connection of the electro-hydraulic unit 1 connectable to a higher-level control unit or a power source. To the second connector 42 is a schematically illustrated second control line 21 for connection of the electro-hydraulic unit 1 to the hydraulic valves 3 . 4 connected. The second variant of the electro-hydraulic unit 1 thus has two separate connector interfaces for controlling the electric motor 6 and the hydraulic valves 3 . 4 on. Incidentally, the second variant of the electro-hydraulic unit 1 identical to the first variant of the electro-hydraulic unit 1 educated. In particular, it is the PCB 8th the control unit 7 around the same PCB 8th as in the first variant of the electro-hydraulic unit 1 ,

The 10 shows the second variant of the electro-hydraulic unit 1 in a second perspective view. To the second variant of the electro-hydraulic unit 1 the same hole pattern or contacting configuration of the second electrical contact 20 the PCB 8th The design of the second stamped grid can be used 41 of the first connector 28 by changing the routing of the individual conductors of the second punched grid 41 be changed. For this purpose, the individual conductors of the second punched grid 41 for example, be bent differently. The first plug 28 and the second plug 42 can work together with the PCB 8th to the housing 9 be screwed. The PCB 8th points, as in the 4 in relation to the first variant of the electro-hydraulic unit 1 shown between the first electrical contact 10 and the second electrical contact 20 the PCB 8th the at least one track 22 on. The at least one track 22 is in the second variant of the electro-hydraulic unit 1 However, not used because the hydraulic valves 3 . 4 outwards over the second plug 42 and the second control line 21 be contacted.

The 11 shows the second punched grid 41 in the 9 and 10 shown first plug 28 , To the PCB 8th facing ends of the second punched grid 41 are the individual conductors of the second punched grid 41 in the form of press-fit pins with needle tubes 43 educated. These are when pressed into the through holes of the second electrical contact 20 the PCB 8th compressed, so that a bias arises.

The 12 shows a third variant of an electro-hydraulic unit 1 in a perspective view. The third variant of the electro-hydraulic unit 1 differs from the second variant of the electro-hydraulic unit 1 only in that the control and / or power supply of the control unit, not shown here 7 and the hydraulic valves 3 . 4 over a common first connector 28 he follows. So even with the third variant of the electro-hydraulic unit 1 the same PCB 8th The individual conductors of the second punched grid can be used 41 of the first connector 28 for example, be bent differently.

LIST OF REFERENCE NUMBERS

1

electro-hydraulic unit

2

electromagnet

3

first hydraulic valve

4

second hydraulic valve

5

Flow Source

6

electric motor

7

control unit

8th

PCB

9

casing

10

first electrical contact

11

contacting

12

first electrical connection

13

second electrical connection

14

first punched grid

15

support part

16

Through opening

17

first gap

18

poetry

19

first control line

20

second electrical contact

21

second control line

22

conductor path

23

contacting

24

first contact points

25

first lid

26

cover

27

component

28

first plug

29

first electric drive

30

second electric drive

31

pump

32

hydraulic connection

33

first taker

34

second taker

35

second lid

36

opening

37

second contact points

38

Quetchrippen

39

second gap

40

first press-in zone

41

second punched grid

42

second plug

43

eye of a needle

Claims (10)

Electro-hydraulic unit (1) with at least one by means of an electromagnet (2) controlled hydraulic valve (3, 4), at least one volumetric flow source (5) comprising a by means of an electric motor (6) driven hydraulic pump (31), a control unit (7) with a PCB (8) for regulating or controlling a pressure and / or a volumetric flow and / or a direction of rotation of the pump (31) and a control unit (7), the volumetric flow source (8) and the at least one hydraulic valve (8). 3, 4) receiving housing (9), characterized in that a control of the at least one hydraulic valve (3, 4) with the control unit (7) of the volume flow source (5) and a first electrical contact (10) for the at least one hydraulic valve (3, 4) is provided directly on the PCB (8). Electro-hydraulic unit (1) according to Claim 1 in which a contacting element (11) is provided for connecting PCB (8) and the at least one hydraulic valve (3, 4). Electro-hydraulic unit (1) according to Claim 2 wherein a first electrical connection (12) between the contacting element (11) and the at least one hydraulic valve (3, 4) with an insulation displacement connection and a second electrical connection (13) between the contacting element (11) and the PCB (8) a press-in connection takes place. Electro-hydraulic unit (1) according to Claim 2 or 3 wherein the contacting element (11) comprises a first stamped grid (14) which is at least partially surrounded by a support part (15). Electro-hydraulic unit (1) according to one of Claims 2 to 4 , wherein a passage opening (16) for the contacting element (11) in the housing (9) is provided and a gap (17) between the housing (9) and the contacting element (11) by means of a seal (18) or an adhesive is sealed. Electro-hydraulic unit (1) according to one of the preceding claims, wherein the at least one hydraulic valve (3, 4) via a first control line (19) is connected to the first electrical contact (10). Electro-hydraulic unit (1) according to one of the preceding claims, wherein the PCB (8) has a second electrical contact (20) for a second control line (21) and wherein the at least one hydraulic valve (3, 4) via the second control line (21) to the second electrical contact (20) of the PCB (8) is connected. Electro-hydraulic unit (1) according to one of the preceding claims, wherein the PCB (8) has a second electrical contact (20) for a second control line (21) and wherein on the PCB (8) at least one conductor track (22) between the first electrical contact (10) for the at least one hydraulic valve (3, 4) and the second electrical contact (20) for the second control line (21) is formed. Electro-hydraulic unit (1) according to one of the preceding claims, wherein the control unit (7) processes signals from speed and / or pressure and / or temperature sensors and / or control commands of a higher-level control unit. Use of PCBs (8) with the same layout for a plurality of electro-hydraulic units (1) according to one of the preceding claims, wherein the electro-hydraulic units (1) can be controlled via different control lines (19, 21).

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