Brake actuating device for motor vehicle brake system, having adapter unit

Abstract

To provide a brake actuating device for a motor vehicle brake system, having an adapter unit.SOLUTION: There is provided a brake actuating device (1) for a motor vehicle brake system comprising a hydraulic unit (2), having a side face (10), on which an electric motor (3) is arranged. In the brake actuating device (1): the electric motor (3) drives a pressure generator, located in the hydraulic unit (2), for conveying a hydraulic fluid; the hydraulic unit (2) comprises a number of outlet openings (13) in the side face (10); an adapter unit (8) which comprises a number of inlet openings (14) is arranged on the side face (10); the outlet openings (13) of the hydraulic unit (2) are connected in fluid communication via respective connecting tubes (11) with the corresponding inlet openings (14) of the adapter unit (8).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The invention relates to a brake actuation device for a motor vehicle brake system according to the preamble of claim 1. [Background technology]

[0002] Patent Document 1 discloses a brake actuation device for a motor vehicle brake system, including a block-type hydraulic unit on which an electric motor and an electronic unit are disposed. The electric motor drives a pressure generator located within the hydraulic unit to deliver hydraulic fluid under pressure toward the wheel brakes of the motor vehicle brake system. A pressure medium reservoir is disposed directly on the hydraulic unit to store the hydraulic fluid. The hydraulic unit contains electromagnetic switching valves that are switched using corresponding solenoids in the electronic unit. The electronic unit serves to control the brake actuation device in open and closed loops. Numerous channels are opened within the hydraulic unit to connect the individual components of the motor vehicle brake system to each other and are connected or disconnected using switching valves. Four such channels open connection openings to the outside of the hydraulic unit, connecting brake lines to the wheel brakes of the motor vehicle brake system. In the brake actuation device shown in FIG. 1, these connections are located above the electric motor. When the brake actuation device is fastened to the vehicle bulkhead on the left side, the connections face the right side of the engine compartment. Under certain installation conditions, these connections may be difficult to access for connecting wheel brake lines. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] German Patent Application Publication No. 102018214565A1 Summary of the Invention [Problem to be solved by the invention]

[0004] It is an object of the present invention to provide a brake actuation device for a motor vehicle brake system that simplifies the connection of brake lines. [Means for solving the problem]

[0005] The object on which the invention is based is achieved by a modular electrohydraulic brake actuation device according to the features characterizing claim 1.

[0006] The modular electrohydraulic brake actuation device is used in slip-controlled motor vehicle braking systems.

[0007] Preferred embodiments of the invention are found in the dependent claims and the following description of exemplary embodiments with reference to the figures. [Brief explanation of the drawings]

[0008] [Figure 1] 1 illustrates an exemplary brake actuation device with an adapter unit. [Figure 2] 1 shows an adapter unit in a first perspective view. DETAILED DESCRIPTION OF THE INVENTION

[0009] FIG. 1 shows an electrohydraulic brake actuation device 1 for a motor vehicle braking system with a central hydraulic unit 2. An electric motor 3 is mounted on a side 10 of the hydraulic unit 2. The electric motor 3 drives a pressure generator arranged in the hydraulic unit 2, which conveys hydraulic fluid in the direction of the wheel brakes of the motor vehicle braking system. The pressure generator can be designed as a two-stage piston pump or as a linear actuator. A pressure medium reservoir 5 is attached to the hydraulic unit 2 to supply hydraulic fluid.

[0010] The electronic unit 4 is arranged on the hydraulic unit 2 opposite the electric motor 3. The electronic unit 4 serves to provide open-loop and closed-loop control of the brake actuation device 1. Within the hydraulic unit 2 there is an electromagnetically operable directional control valve which is driven by a solenoid in the electronic unit 4. The directional control valve is used to control the flow of fluid between the individual components of the motor vehicle brake system. A number of channels are therefore opened within the hydraulic unit 2 to connect the individual components of the motor vehicle brake system to one another. Four of these channels open respective outlet openings 13 on a side surface 10 of the hydraulic unit 2.

[0011] In the present example, the adapter unit 8 is mounted on a side 10 of the hydraulic unit 2. In the present example, the adapter unit 8 includes four connection openings 9 for brake lines leading to the wheel brakes of the motor vehicle brake system. To connect these connection openings 9 to the hydraulic unit 2, the adapter unit 8 includes inlet openings not visible in FIG. 1 . The inlet openings of the adapter unit 8 are fluidly connected to outlet openings 13 of the hydraulic unit 2 via exemplary connecting pipes 11. Each outlet opening 13 is thus connected to a corresponding inlet opening of the adapter unit 8. The connecting pipes 11 are connected to the respective outlet openings 13 and inlet openings on both sides using union nuts. The connecting pipes 11 are preferably made of copper or a copper alloy and are preferably coated with aluminum polyamide. A rigid and curved design of the connecting pipes 11 is essential. In this case, the connecting pipes 11 are routed around the electric motor 3.

[0012] By means of the adapter unit 8 according to the example, the connection openings 9 for the wheel brake lines are relocated to a more accessible position in the engine compartment, which makes it easier to connect the brake lines to the brake actuation device 1. The adapter unit 8 creates the possibility of a modular approach, so that a conventional hydraulic unit 2 for the brake actuation device 1 can be used without requiring a special design. In applications where it is more difficult to access the connection openings for the wheel brake lines, an additionally mounted adapter unit 8 is used. This increases the flexibility of the installation of the brake actuation device 1 in the motor vehicle.

[0013] The hydraulic unit 2 is also provided with a flange 7 by means of which the brake actuating device 1 is attached to a fastening point in the motor vehicle, with a piston rod 6 protruding from the flange 7 leading to the interior of the vehicle and actuated by a pedal.

[0014] FIG. 2 shows the adapter unit 8 in a phantom view. It also shows the rear inlet openings 14 into which the connecting pipes are screwed. The inlet openings 14 are integrated into the channels 12, which then open into the connecting openings 9 for the wheel brakes. The channels 12 are drilled into the adapter unit 8, which is made of aluminum and, if necessary, closed with plugs. In this way, a fluid connection is established between each inlet opening 14 and the corresponding connecting opening 9. Three of the connecting openings 9 are arranged on one connecting surface 15, which is also oriented perpendicular to the side surface of the hydraulic unit. The fourth connecting opening 9 is arranged on another connecting surface of the adapter unit 8, which is oriented parallel to the side surface of the hydraulic unit. The adapter unit 8 further includes a connecting flange 16 with two openings, by means of which the flange is screwed into the hydraulic unit. [Explanation of symbols]

[0015] 1 Brake actuating device 2 Hydraulic Unit 3 Electric motor 4 Electronic Unit 5 Pressure medium reservoir 6 Piston rod 7 Fastening flange 8 Adapter Unit 9 Connection openings for wheel brake lines 10 Side 11 Connecting pipe 12 channels 13 Exit opening 14 Entrance opening 15 Connection Surface 16 Connection flange

Claims

1. 1. A brake actuation device (1) for a motor vehicle brake system including a hydraulic unit (2) having a side (10) on which an electric motor (3) is arranged, the electric motor (3) driving a pressure generator located in the hydraulic unit (2) for conveying hydraulic fluid, the hydraulic unit (2) including a number of outlet openings (13) in the side (10), an adapter unit (8) including a number of inlet openings (14) is arranged on the side (10), the outlet openings (13) of the hydraulic unit (2) being connected in fluid communication with the corresponding inlet openings (14) of the adapter unit (8) via respective connecting pipes (11).

2. 2. The brake actuation device (1) according to claim 1, wherein the adapter unit (8) comprises a connection surface (15) having a number of connection openings (9) for fluidly connecting wheel brakes of the motor vehicle brake system.

3. 3. A brake actuation device (1) according to claim 2, wherein the connection surface (15) of the adapter unit (8) is oriented perpendicular to the side surface (10) of the hydraulic unit (2).

4. A brake actuation device (1) according to any one of claims 1 to 3, wherein in each case one of the inlet openings (14) is connected to in each case one of the connection openings (9) via a channel (12) made in the adapter unit (8).

5. A brake actuation device (1) according to claim 4, wherein the channel (12) is drilled in the adapter unit (8).

6. The brake actuation device (1) according to any one of the preceding claims, wherein the connecting tube (11) is made at least from copper.

7. A brake actuation device (1) according to any one of the preceding claims, wherein the connecting tube (11) is of a rigid, curved design.

8. The brake actuation device (1) according to any one of the preceding claims, wherein the connecting pipe (11) is led at least in part around a housing of the electric motor (3).

9. A brake actuating device (1) as claimed in any one of claims 1 to 8, wherein in an installed position of the brake actuating device (1), the adapter unit (8) is arranged above the electric motor (3) on the hydraulic unit (2).

10. The brake actuation device (1) according to any one of the preceding claims, wherein the adapter unit (8) is connected to the hydraulic unit (2) by means of a threaded connection.

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