Hydraulic block for brake unit of hydraulic non-manual brake equipment

Abstract

The subject of the present invention is drilling of a hydraulic block (20) of a brake unit (3) of a hydraulic non-human-powered vehicle brake equipment (1).

Description

Technical Field

[0001] The present invention relates to a hydraulic block for a brake unit of a hydraulic non-manual braking equipment for motor vehicles, which has the constituent elements of the preamble of claim 1.

Background Art

[0002] Patent Document 1 discloses an elongated rectangular parallelepiped hydraulic block for a hydraulic unit of a slip-controlled hydraulic non-manual braking equipment, which has three connection parts for a brake fluid storage container on the upper surface thereof. Below these connection parts, a master brake cylinder bore extends continuously through the hydraulic block parallel to the upper surface, from one narrow surface contacting the upper surface to the opposite narrow surface. Below the master brake cylinder bore, a non-manual cylinder bore penetrates from one wide surface of the hydraulic block contacting the upper surface and both narrow surfaces to the opposite wide surface, transversely to the master brake cylinder bore. In order to generate a brake pressure by non-manual means, a non-manual piston is slidable in the non-manual cylinder bore via a ball screw by an electric motor. The electric motor is arranged outside the hydraulic block coaxially with the non-manual cylinder bore, and the ball screw is - also coaxially with the electric motor and the non-manual cylinder bore - between the electric motor and the non-manual piston. The electric motor and the ball screw form a non-manual drive device, and together with the non-manual piston and the non-manual cylinder bore, form a non-manual brake pressure generator for a hydraulic vehicle braking equipment. A connection part for a hydraulic wheel brake by a brake pipe is provided on one of the two wide surfaces of the hydraulic block at the height of the connection part for the brake fluid storage container near the upper surface. A simulator cylinder bore for a pedal stroke simulator of the non-manual braking equipment is provided on the lower surface opposite to the upper surface of the known hydraulic block.

Prior Art Documents

Patent Documents

[0003] [Patent Document 1] German Patent Application Publication No. 102016202113A1 [Overview of the Initiative]

[0004] The hydraulic block of the present invention having the constituent elements of claim 1 is intended for a brake unit of a hydraulic non-human-operated braking system for an automobile in which brake pressure control is performed. Brake pressure control means the generation and control of brake pressure in the hydraulic wheel brake of a braking system connected to the vehicle braking system, the brake circuit of the vehicle braking system, and / or the hydraulic block. Brake pressure control may also include slip control in particular. Slip control is, for example, anti-lock control, traction control, and / or vehicle dynamic control, for which the abbreviations ABS, ASR, and / or FDR are commonly used. Slip control is well known and will not be described in detail here.

[0005] The hydraulic block serves as the mechanical mounting point for the hydraulic components of the vehicle's braking system, brake pressure generation, and / or brake pressure control, and / or slip control, as well as the hydraulic piping. Such hydraulic components include, in particular, solenoid valves, check valves, hydraulic reservoirs, damper chambers, and pressure sensors. The hydraulic components are mounted in the housing of the hydraulic block, which is often configured to have a partial diameter step, such as a cylindrical recess, blind hole, or through-hole. “Piped” means that the housing or the hydraulic components mounted therein are connected through pipes in the hydraulic block according to the hydraulic wiring diagram of the vehicle's braking system. However, the pipes are typically not necessarily drilled into the hydraulic block.

[0006] A hydraulic block constitutes a brake unit on which the hydraulic components of the vehicle brake system or its slip control are mounted, where "mounted" means that the hydraulic components are fitted into the respective housings of the hydraulic block for which they are intended.

[0007] The present invention focuses particularly on the perforation of hydraulic blocks, that is, the guidance of pipes between each hydraulic component or between their housings in a hydraulic block.

[0008] The hydraulic block according to the present invention has a top surface intended for mounting a brake fluid storage container. The hydraulic block has one or more connection points for the brake fluid storage container on its top surface.

[0009] The mounting surface of the hydraulic block, which contacts the upper surface of the hydraulic block, is configured for mounting the hydraulic block or brake unit, i.e., the hydraulic block on which the hydraulic components of the vehicle's braking system are mounted, to the splashboard of the automobile. For this purpose, the hydraulic block has, for example, two standardized female threaded holes on its mounting surface, into which stud screws or stud bolts can be screwed for mounting the hydraulic block or brake unit to the splashboard of the automobile. The master brake cylinder bore communicates with the mounting surface of the hydraulic block, thereby allowing the master brake cylinder piston to slide by force within the master brake cylinder bore via a brake pedal mounted on the splashboard of the automobile facing the hydraulic block, and via a pedal rod that pivotally connects the brake pedal to the master brake cylinder piston. Preferably, the master brake cylinder bore extends through the hydraulic block parallel to the upper surface.

[0010] A non-human-powered cylinder bore for generating brake pressure non-human is provided in the hydraulic block between the upper surface of the hydraulic block and the master brake cylinder bore, oriented laterally to the master brake cylinder bore. Thus, the master brake cylinder bore is located below the non-human-powered cylinder bore, that is, on the side of the non-human-powered cylinder bore that faces away from the upper surface of the hydraulic block, or between the non-human-powered cylinder bore and the lower surface of the hydraulic block facing the upper surface. The non-human-powered cylinder bore communicates with the motor surface of the hydraulic block, which is in contact with the upper surface and the mounting surface, and is intended for mounting an electric motor to drive the non-human-powered brake pressure generator.

[0011] A simulator cylinder bore for the pedal stroke simulator is provided on the hydraulic block between the upper surface of the hydraulic block and the master brake cylinder bore, that is, above the master brake cylinder bore, and also perpendicular to the master brake cylinder bore. Preferably, this is in communication with the valve surface of the hydraulic block facing the motor surface, which is in contact with the mounting surface and the upper surface, similar to the motor surface.

[0012] According to the present invention, a second return pipe extends from a housing for the discharge valve of the vehicle brake system within the hydraulic block, through the simulator cylinder bore, to one of the connections for the brake fluid container. The return pipe is a pipe for the brake fluid that is drilled or otherwise fabricated in the hydraulic block. Preferably, the second return pipe extends from the housing for the discharge valve to the simulator cylinder bore, and from the simulator cylinder bore, obliquely to the motor surface, to the connection for the brake fluid container located on the upper surface of the hydraulic block. Furthermore, the second return pipe can lead to the master brake cylinder.

[0013] A second return pipe is positioned in the hydraulic block so as to communicate with the simulator cylinder bore on the back side of the simulator piston. The simulator piston divides the simulator cylinder bore into a pressure-biasable working chamber on the front side of the simulator piston, which is connected to the master brake cylinder by a simulator valve, and a pressure-free chamber on the back side of the simulator piston, which communicates with a pressure-free brake fluid container. According to the present invention, the second return pipe extends through the pressure-free chamber of the simulator cylinder bore.

[0014] In one embodiment of the present invention, the first return pipe leads from a housing for a discharge valve in the hydraulic block to a non-manual cylinder bore, and from the non-manual cylinder bore to one of the connections for a brake fluid container. Preferably, both return pipes connect different housings for the discharge valve to different connections for the brake fluid container. The first return pipe can be implemented independently of the guidance of the second return pipe described above.

[0015] Through-holes or blind holes in a hydraulic block, which may be called "pipes," "bores," or "cylinder bores," may be manufactured in a manner separate from drilling.

[0016] The dependent claims cover further developments and preferred embodiments of the invention described in the independent claims.

[0017] Any constituent elements disclosed in the specification and drawings may be embodied in embodiments of the present invention, either individually or in essentially any combination. Embodiments of the present invention having only one or more constituent elements, rather than all of the constituent elements of one claim or one embodiment of the present invention, are also possible in principle. For example, embodiments of the present invention may have a connection for an auxiliary brake unit located in a different location from the feature of claim 1.

[0018] Next, the present invention will be described in detail while referring to the embodiments shown in the drawings. The drawings show the following.

Brief Description of the Drawings

[0019] [Figure 1] It is a hydraulic wiring diagram of an electro-hydraulic non-manual braking equipment. [Figure 2] It is the motor surface of the hydraulic block according to the present invention of the brake unit of the vehicle braking equipment in FIG. 1. [Figure 3] It is the valve surface of the hydraulic block facing the motor surface in FIG. 2. [Figure 3a] It is a cross-sectional view of the hydraulic block along the bent cutting line A-A in FIG. 3. [Figure 3b] It is a cross-sectional view of the hydraulic block along the line B-B in FIG. 3. [Figure 4] It is a part of the perforation of the hydraulic block in FIGS. 2 and 3.

Embodiments for Carrying Out the Invention

[0020] Each drawing is a partially simplified drawing including partially different scales.

[0021] The electro-hydraulic non-manual braking equipment 1 shown in FIG. 1 is intended for a passenger car having four wheel brakes 2. This non-manual braking equipment has a brake unit ③, to which four wheel brakes 2 are connected via brake pipes. The vehicle braking equipment 1 is constructed as a two-circuit braking equipment, and two wheel brakes 2 are connected to one brake circuit respectively.

[0022] For non-manual braking, the braking equipment 3 has a piston-cylinder unit 4, and its piston 5 can slide in the cylinder 8 by means of an electric motor 6 via a screw transmission device 7 as a rotation / translation conversion gear. The electric motor 6, the screw transmission device 7, and the piston-cylinder unit 4 form a non-manual brake pressure generator 9 of the brake unit 3 for generating a brake pressure for non-manual braking. The non-manual braking in which the brake pressure is generated by the non-manual brake pressure generator 9 is an intended normal brake operation, that is, service braking.

[0023] By means of the check valve 10, the non-manual brake pressure generator 9, that is, the cylinder 8 of the piston-cylinder unit 4 of the non-manual brake pressure generator 9, is connected to the chamber 11''' of the brake fluid container 11, and the wheel brakes 2 are connected to the cylinder 8 of the piston-cylinder unit 4 of the non-manual brake pressure generator 9 via the service brake valve 12 in each brake circuit that is hydraulically connected in parallel to each other.

[0024] The braking equipment 1 has an intake valve 13 and an exhaust valve 14 for each wheel brake 2, by which the wheel brake pressure can be individually controlled at each wheel brake 2. Thereby, the wheel brake pressure in the wheel brake 2 and, accordingly, the braking force of the wheel brake 2 can be controlled without slip during normal driving operations. Furthermore, slip control such as anti-lock control, traction control, vehicle dynamic control, etc., which is also called skid control in everyday language, automatic braking, inter-vehicle distance control, and others are possible. Such controls are well-known and will not be described in detail here. The intake valve 13 and the exhaust valve 14 can also be regarded as a wheel brake pressure control valve mechanism 13, 14. In each brake circuit, two intake valves 13 are hydraulically connected in parallel to the non-manual brake pressure generator 9 by the service brake valve 12.

[0025] In addition to the non-human-operated brake pressure generator 9, the braking system 1 has a two-circuit master brake cylinder 15 that can be operated by muscle power. The wheel brakes 2 of each brake circuit are connected to this cylinder by a separation valve 16 and two intake valves 13. The master brake cylinder 15 acts as a target value generator for the wheel brake pressure to be adjusted by the wheel brakes 2. Under non-human-operated braking, the brake pressure is generated by the non-human-operated brake pressure generator 9. Under non-human-operated braking, the master brake cylinder 15 is hydraulically separated from the wheel brakes 2 by the closing of the separation valve 16. If the non-human-operated brake pressure generator 9 fails, brake pressure is generated by operating the master brake cylinder 15 by muscle power (so-called auxiliary braking).

[0026] Under the closed separation valve 16, the brake unit 3 has a pedal stroke simulator 18 connected to the master brake cylinder 15 via a simulator valve 19 in a single brake circuit, so that brake fluid is pushed away from the master brake cylinder 15 and can move the piston of the master brake cylinder 15 and the brake pedal 17. The pedal stroke simulator 18 is a piston-cylinder unit having a spring-driven piston.

[0027] In the illustrated and described embodiment of the present invention, the intake valve 13 and the separation valve 16 are 2 / 2-way controlled solenoid valves that open when they are in their unpowered basic position, and the service brake valve 12, discharge valve 14, and simulator valve 19 of the non-human-powered brake pressure generator 9 are 2 / 2-way controlled solenoid valves that close when they are in their unpowered basic position.

[0028] The hydraulic components of the electro-hydraulic non-human-powered brake system 1, namely the valves 12, 13, 14, 16, 19, and 21 of the non-human-powered brake pressure generator 9, the master brake cylinder 15, the pedal stroke simulator 18, and other components such as pressure sensors, are located in the housings of the hydraulic block 20 of the brake unit 3 and are connected to each other by perforations in the hydraulic block 20 in accordance with the hydraulic wiring diagram of the vehicle brake system 1 shown in Figure 1. The housing 21' for the test valve 21 communicates with the master brake cylinder bore 15' (Figure 3b) by a bore 42 that leads axially from the bottom surface of the housing 21' to a groove 38 surrounding the master brake cylinder bore 15'. The groove 38 and the bore 42 communicating with it are shown offset in the cross-sectional plane in Figure 3b. In reality, they are located behind the bore 42 and the oblique hole 39 in the line of sight looking at the mounting surface 29 of the hydraulic block 20.

[0029] Furthermore, an oblique hole 39 extends from the bottom surface of the housing 21' for the test valve 21 to a horizontal bore 40 parallel to the master brake cylinder bore 15' and between the master brake cylinder bore 15' and the valve surface, which leads to the first return pipe 22. Thus, the housing 21' for the test valve 21 is connected to one of the connection parts 27' for the brake fluid container 11 (Figure 3b).

[0030] In one of the two brake circuits, the master brake cylinder 15 is connected by a test valve 21 to one of the chambers 11' of the brake fluid reservoir 11. In this embodiment, the test valve 21 is a 2 / 2 directional solenoid valve that also opens when in its unpowered basic position. In the other brake circuit, the master brake cylinder 15 is connected to the back surface of the pedal stroke simulator 19, which in turn is connected to the chamber 11'' of the brake fluid reservoir 11, thereby being unpressurized. The back surface of the pedal stroke simulator 19 is one of the two chambers of the cylinder of the pedal stroke simulator 19, where the piston of the pedal stroke simulator 19 divides the cylinder of the pedal stroke simulator 19. The front surface of the pedal stroke simulator 19 is connected to the master brake cylinder 15 by a simulator valve 19 and is pressure-driven by the master brake cylinder 15 when the simulator 19 is open.

[0031] In one brake circuit, the discharge valve 14 is connected to the cylinder 8 of the piston-cylinder unit 4 of the non-human-operated brake pressure generator 9 by a first return pipe 22 that runs around the piston 5 of the piston-cylinder unit 4, in the chamber 11' of the brake fluid container 11. In the other brake circuit, the discharge valve 14 is connected to another chamber 11'' of the brake fluid container 11, together with the master brake cylinder 15, by a second return pipe 23.

[0032] Figure 2 shows the motor surface 24 of the hydraulic block 20 of the brake unit 3, and Figure 3 shows the valve surface 25. In this embodiment, the hydraulic block 20 is a flat rectangular metal block that serves as the mechanical mounting point for the hydraulic components of the non-human-powered brake system 1 and for hydraulic piping. The hydraulic components are mounted on the hydraulic block 20 to form the brake unit 3 of the vehicle brake system 1. "Flat" means that the hydraulic block 20 is approximately three to four times wider or longer than it is thick. The two opposing wide surfaces of the hydraulic block 20 are approximately square in this embodiment and form the motor surface 24 and the valve surface 25. In Figures 2 and 3, the hydraulic block 20 is shown without mounting, i.e., without hydraulic components.

[0033] The narrow surface of the hydraulic block 20, referred to here as the upper surface 26, has three cylindrical blind holes that serve as connection parts 27', 27'', 27'''' for the chambers 11', 11'', 11'''' of a brake fluid container 11 (not shown) positioned on the upper surface 26 of the hydraulic block 20. At this time, the connecting nipple on the bottom surface of the brake fluid storage container 11 enters the blind holes of the hydraulic block 20 that form the connection parts 27', 27'', 27'''' and is sealed there by an O-ring.

[0034] The hydraulic block 20 has a master brake cylinder bore 15' which forms the master brake cylinder 15, positioned parallel to the upper surface 26 and in the center between the motor surface 24 and the valve surface 25. In Figures 2 and 3, the master brake cylinder bore 15' is shown by a dashed line. In this embodiment, the master brake cylinder bore is located slightly below the center of the hydraulic block 20, between the upper surface 26 and the opposite lower surface 28 of the hydraulic block 20, so that the master brake cylinder bore 15' contacts the central plane of the hydraulic block 20 tangentially between the upper surface 26 and the lower surface 28.

[0035] The master brake cylinder bore 15' is open on the narrow side of the hydraulic block 20 and communicates with, or has a communication portion with, this narrow side of the hydraulic block 20. The narrow side of the hydraulic block 20 that is open to or communicates with the master brake cylinder bore 15' is referred to here as the mounting surface 29 of the hydraulic block 20. This mounting surface is in contact with the upper surface 26, motor surface 24, valve surface 25, and lower surface 28 of the hydraulic block 20 and is intended for mounting the hydraulic block 20 to a splash board of an automobile (not shown). The hydraulic block 20 is mounted to the splash board of an automobile with its upper surface 26 facing upwards together with the brake fluid container 11. The master brake cylinder bore 15' is open at the mounting surface 29 of the hydraulic block 20, thereby allowing the master brake cylinder piston to slide within the master brake cylinder bore 15' via a pedal rod that pivotally connects the master brake cylinder piston to the foot brake pedal 17, which is mounted on the opposite side of the splash board. The foot brake pedal 17 and pedal rod are not shown in Figures 2 and 3.

[0036] The non-human-powered cylinder bore 8' that forms the cylinder 8 of the non-human-powered brake pressure generator 9 is positioned perpendicular to the master brake cylinder bore 15' on the motor surface 24 of the hydraulic block 20, and protrudes as a kind of dome 30 on the valve surface 25. The non-human-powered cylinder bore 8' is slightly above the master brake cylinder bore 15', i.e., between the master brake cylinder bore 15' and the upper surface 26 of the hydraulic block 20. The non-human-powered cylinder bore 8' passes by the master brake cylinder bore 15' at a right angle with a small gap between them, and is positioned slightly eccentrically, offset towards the mounting surface 29 of the hydraulic block 20.

[0037] The electric motor 6 of the non-human-operated brake pressure generator 9, which is not shown in Figure 2, is positioned coaxially with respect to the non-human-operated cylinder bore 8' and outside the motor surface 24 of the hydraulic block 20. A planetary gear, which functions as a reduction gear and, in this embodiment, as a ball screw screw drive device 7, is positioned coaxially with respect to the non-human-operated cylinder bore 8' between the electric motor 6 and the piston 5 of the non-human-operated brake pressure generator 9 (not shown in Figure 2).

[0038] The valve surface 25 of the hydraulic block 20 is provided with a cylinder bore 18' for the pedal stroke simulator 18, parallel to the non-human-operated cylinder bore 8' and perpendicular to the master brake cylinder bore 15'. In this embodiment, the cylinder bore 18' is located between the master brake cylinder bore 15' and the upper surface 26 of the hydraulic block 20, closer to the upper surface 26 than the master brake cylinder bore 15', and between the non-human-operated cylinder bore 8' and the narrow surface 31 facing the mounting surface 29 of the hydraulic block 20.

[0039] Housings 12', 13', 14', 16', 19', 21' for solenoid valves 12, 13, 14, 16, 19, 21, and housings for other components such as pressure sensors are provided on the valve surface 25 of the hydraulic block 20. In Figure 3, the housings indicated by a "'" after the reference numerals of each solenoid valve 12, 13, 14, 16, 19, 21, or other component are cylindrical recesses or blind holes in the hydraulic block 20 with a partially stepped diameter. The hydraulic components are inserted into the housings and crimped tightly to form a circumferential shape. Of the solenoid valves 12, 13, 14, 16, 19, 21, the hydraulic area that forms the actual valve is located within the housing, while the armature, magnetic coil, etc., housed in the valve dome protrude from the valve surface 25 of the hydraulic block 20.

[0040] The hydraulic block 20 of the brake unit 3 is drilled according to the hydraulic wiring diagram shown in Figure 1. "Drilled" or "drilled" means bores that form cylinder bores, housings for solenoid valves and connections, and pipes that connect them according to the hydraulic wiring diagram, provided in the hydraulic block 20. The hydraulic block 20 is drilled in Cartesian coordinates, that is, bores, housings, connections, pipes, etc., are provided in the hydraulic block 20 parallel and perpendicular to each other and to the sides and edges of the hydraulic block 20. This does not exclude individual pipes or bores that extend diagonally.

[0041] Two connection points 2' for brake pipes leading to two wheel brakes 2 are provided on the motor surface 24 along a narrow surface 31 facing the mounting surface 29, and two connection points 2' for brake pipes leading to two wheel brakes 2 are provided on the motor surface 24 near the lower surface 28 of the hydraulic block 20. "Nearby" means a distance not greater than the radius of each connection point.

[0042] Between the non-human-operated cylinder bore 8' and the upper surface 26, three through holes extending from the motor surface 24 to the valve surface 25 are provided in the hydraulic block 20 as motor connection bores 32 for supplying current from the non-human-operated brake pressure generator 9 to the electric motor 6. The motor connection bores 32 are provided in the hydraulic block 20 between the non-human-operated cylinder bore 8' and the upper surface 26, on a virtual arc centered on the non-human-operated cylinder bore 8'. Similarly, on the virtual arc in which the motor connection bores 32 are provided, signal bores 33 for control lines and / or signal lines to and from the electric motor 6 are provided in the hydraulic block 20.

[0043] A first return pipe 22, shown as a bore in the hydraulic block 20 and connected to one of the connection parts 27' for one of the chambers 11' of the brake fluid container 11, passes around the piston 5 of the piston-cylinder unit 4 of the non-human-powered brake pressure generator 9, through two of the housings 14' for the discharge valves 14 of the two wheel brakes 2, and is shown as a dashed line in Figure 3. Starting from the connection part 27' for the chamber 11' of the brake fluid container 11, the first return pipe 22 first passes as an oblique hole from the bottom surface of the connection part 27' to a non-human-powered cylinder bore 8' that forms the cylinder 8 of the piston-cylinder unit 4 of the non-human-powered brake pressure generator 9. From the non-human-powered cylinder bore 8', the first return pipe 22 is offset in the direction of the mounting surface 29 and further extends parallel downward, passing between both housings 14' for both discharge valves 14 to the lower surface 28 of the hydraulic block 20. Both housings 14' are connected to the first return pipe 22 by a lateral hole (not shown) communicating with the mounting surface 29 of the hydraulic block 20. "Angled hole" means that the section of the first return pipe 22 leads from the connection 27' for the brake fluid reservoir 11 to the non-operated cylinder bore 8' at an angle to the motor surface 24 and valve surface 25, and—in this embodiment, parallel to the mounting surface 29 and narrow surface 31. Except for the section from the connection 27' to the non-operated cylinder bore 8', the first return pipe 22 extends parallel to the surfaces 24, 25, 26, 28, 29, 31 and edges of the hydraulic block 20, just like all other bores. The portion of the first return pipe 22 coming from the connection 27' for the brake fluid container 11, as well as the portion of the first return pipe 22 leading to the housing 14' for the discharge valve 14, communicates with a groove 34 in the non-human-powered cylinder bore 8', which is located in the radial plane of the non-human-powered cylinder bore 8' where the piston 5 of the piston-cylinder unit 4 of the non-human-powered brake pressure generator 9 is located when assembled. The first return pipe 22 is thus guided around the piston 5 of the piston-cylinder unit 4 of the non-human-powered brake pressure generator 9 and does not communicate with the cylinder 8 of the piston-cylinder unit 4 of the non-human-powered brake pressure generator 9.The groove 34 of the non-manual cylinder bore 8' is shown as a dashed line in Figure 3.

[0044] The second return pipe 23 is also shown by a dashed line in Figure 3 and extends upward from both other housings 14' for the discharge valves 14 of the two wheel brakes 2 toward the cylinder bore 18' of the pedal stroke simulator 18, and from there offset toward the narrow face 31 of the hydraulic block 20 and further parallel upward to a connection 27'' distinct from the first return pipe 22 in the chamber 11'' of the brake fluid container 11.

[0045] Between the cylinder bore 18' of the pedal stroke simulator 18 and the connection portion 27'' of the chamber 11'' of the brake fluid container 11, the second return pipe 23 extends parallel to the mounting surface 28 and the narrow surface 31 of the hydraulic block 20 facing it, but obliquely to the motor surface 24 and valve surface 25 of the hydraulic block 20. The oblique direction of travel of the second return pipe 23 can be seen in Figure 3a. The cross-sectional plane in Figure 3a has an offset radially with respect to the cylinder bore 18' of the pedal stroke simulator 18, either in the direction of the mounting surface 29 or in the direction of the narrow surface 31 of the hydraulic block 20 facing the mounting surface 29. The offset of the cross-sectional plane in Figure 3a is illustrated by the cross-sectional line AA in Figure 3. In Figure 3a, the region of the second return pipe 23 that extends obliquely to the motor surface 24 and valve surface 25 of the hydraulic block 20 between the cylinder bore 18' of the pedal stroke simulator 18 and the connection portion 27'' of the chamber 11'' of the brake fluid container 11 is shown as offset to the cutting plane. In reality, the oblique region of the second return pipe 23 has a radial offset with respect to the connection portion 27'' of the chamber 11'' of the brake fluid container 11, as can be seen in Figure 3.

[0046] The lateral hole 37 connects both housing sections 14' for the discharge valve 14 to each other.

[0047] The second return pipe 23 communicates with the master brake cylinder bore 15', thereby connecting one of the chambers of the dual-circuit master brake cylinder 15 to one of the chambers 11'' of the brake fluid container 11 via the cylinder bore 18' of the pedal stroke simulator 18. The second return pipe 23 communicates with the radial plane of the cylinder bore 18' of the pedal stroke simulator 18, which is unpressurized by the connection to the brake fluid container 11, located on the back surface of the piston of the pedal stroke simulator 18.

[0048] The second return pipe 23 is drilled from the lower surface 28 into the hydraulic block 20 and passes radially through the master brake cylinder bore 15', so that when drilling the second return pipe 23, the drill strikes the cylinder wall of the master brake cylinder bore 15' perpendicularly rather than obliquely when exiting the master brake cylinder bore 15'. This prevents the drill from being offset tangentially with respect to the master brake cylinder bore 15' when exiting the master brake cylinder bore 15', and thus prevents fracture. The master brake cylinder bore 15' has a circumferential groove 41, through which the second return pipe 23 communicates radially at two points opposite each other in diameter.

[0049] Figure 4 shows a portion of the hydraulic block 20 from a line of sight looking at the narrow surface 31 facing the mounting surface 29. A dome 30 can be seen that extends the non-operated cylinder bore 8' protruding from the valve surface 25 of the hydraulic block 20. The non-operated cylinder bore 8' is shown with a solid line, similar to the connection portions 27'', 27''' of the brake fluid container 11. A brake pipe, manufactured as a bore in the hydraulic block 20, is coaxially connected to one of the connection portions 27'''. After bending, it extends parallel to the non-operated cylinder bore 8' at the wall of the dome 30 and communicates with a circular groove 36 that surrounds the non-operated cylinder bore 8' with the dome 30.

[0050] The connection portion 27'''' for the brake fluid container 11 has a recess 10' extending from it, which serves as a housing for a check valve 10 located in the brake pipe 35 leading to the non-manual cylinder bore 8'. The check valve 10 is shown as a switch symbol in Figure 4.

[0051] In order to ventilate the master brake cylinder 15, that is, to remove air bubbles from the brake fluid inside the master brake cylinder 15, a brake pipe 43 connecting the master brake cylinder bore 15' to one of the housings 16' for both separation valves 16 is tangentially connected to the master brake cylinder bore 15' at a circumferential point facing the upper surface 26 of the hydraulic block 20 (Figure 3b). In Figure 3, it can be seen that one of the housings 16' for the separation valves 16 is positioned tangentially to the upper surface 26 of the hydraulic block 20 near the right side of the communication point of the non-manual cylinder bore 15' on the mounting surface 29 of the hydraulic block 20. [Explanation of Symbols]

[0052] 1. Brake equipment 2-wheel brakes 2' Connection part 5 Non-human-powered pistons 6 Electric motor 8' Non-Human-Powered Cylinder Bore 9. Non-human-powered brake pressure generator 10 Check valve 10' Storage Unit 11 Brake fluid container 12 Service brake valve 12' Storage Unit 13 Intake valve 13' Containment Unit 14 Discharge valve 14' Storage Unit 15' Master Brake Cylinder Bore 16 Separation valve 16' Storage Unit 18 Pedal Stroke Simulator 18' Simulator Cylinder Bore 19 Simulator valve 19' Detention Unit 20 Hydraulic Blocks 22 First return pipe 23. Second return pipe 24 Motor surface 25 Valve surface 26 Top side 27'27'',27''' Connection 29 Mounting surface 30 Domes 32 Motor connection bore 33 signal bore 34 Groove 35 Brake pipe 43 Brake pipe

Claims

1. A hydraulic block for a brake unit of a hydraulic non-operational brake system for an automobile, wherein the hydraulic block (20) comprises: a top surface (26) intended for mounting a brake fluid container (11) and having a connection portion (27', 27'', 27''') for the brake fluid container (11); a mounting surface (29) in contact with the top surface (26) and configured for mounting the hydraulic block (20) to the splash board of an automobile and communicating with a master brake cylinder bore (15'); and a motor in contact with the top surface (26) and the mounting surface (29) and communicating with a non-operational cylinder bore (8') and capable of accommodating an electric motor (6) for sliding a non-operational piston (5) of a non-operational brake pressure generator (9) within the non-operational cylinder bore (8'). A hydraulic block having a top surface (24), a connection portion (2') for a hydraulic wheel brake (2), and a simulator cylinder bore (18') for a pedal stroke simulator (18) of the non-human-operated brake equipment (1), wherein the non-human-operated cylinder bore (8') and the simulator cylinder bore (18') are provided in the hydraulic block (20) between the top surface (26) and the master brake cylinder bore (15'), and a second return pipe (23) extends within the hydraulic block (20) from a housing portion (14') for a discharge valve (14), through the simulator cylinder bore (18') to one of the connection portions (27'') for the brake fluid container (11).

2. The hydraulic block according to claim 1, characterized in that the second return pipe (23) passes from the housing (14') for the discharge valve (14) to the master brake cylinder bore (15'), and from the simulator cylinder bore (18') passes obliquely to the motor surface (24) to the connection (27'') for the brake fluid container (11).

3. The hydraulic block according to claim 1 or 2, characterized in that the second return pipe (23) penetrates the master brake cylinder bore (15') radially.

4. The hydraulic block according to claim 1 or 2, characterized in that a first return pipe (22) in the hydraulic block (20) passes from a housing (14') for a discharge valve (14) to the non-operated cylinder bore (8'), and from the non-operated cylinder bore (8') to one of the connection portions (27') for the brake fluid container (11).

5. The hydraulic block according to claim 4, characterized in that the portion of the first return pipe (22) coming from the housing (14') for the discharge valve (14) communicates with the groove (34) of the non-manual cylinder bore (8') at a circumferential location different from the portion of the first return pipe (22) leading to the connection (27').

6. The hydraulic block according to claim 1 or 2, wherein the hydraulic block (20) has a dome (30) protruding from a valve surface (25) facing the motor surface (24), the non-operated cylinder bore (8') extending into the dome, and within the hydraulic block (20) a portion of the brake pipe (35) that leads from one of the connection portions (27''') for the brake fluid container (11) on the upper surface (26) of the hydraulic block (20) to the non-operated cylinder bore (8') extends through the cylinder wall of the dome (30).

7. The hydraulic block (20) according to claim 1 or 2, characterized in that the hydraulic block (20) has housings (12', 13', 14', 16', 19') for valves (12, 13, 14, 16, 19) for brake pressure control of the non-human-powered brake equipment (1) on the valve surface (25) of the hydraulic block (20) facing the motor surface (24).

8. The hydraulic block according to claim 1 or 2, characterized in that the connection portion (2') for the wheel brake (2) is arranged on the motor surface (24) of the hydraulic block (20).

9. The hydraulic block according to claim 1 or 2, characterized in that a brake pipe (43) within the hydraulic block (20) that leads from the master brake cylinder bore (15') to a housing (16') for the separation valve (16) communicates with the master brake cylinder bore (15') at a circumferential portion facing the upper surface (26) of the hydraulic block (20).

10. The hydraulic block according to claim 1 or 2, characterized in that one of the connection portions (27'') for the brake fluid container (11) on the upper surface (26) of the hydraulic block (20) has a concentric housing (10') for a check valve (10), and a brake pipe (35) leads from the housing to the non-operated cylinder bore (8') within the hydraulic block (20).

11. The hydraulic block according to claim 6, characterized in that a motor connection bore (32) for supplying current from the non-human-powered brake pressure generator (9) to the electric motor (6), and a signal bore (33) for control lines and / or signal lines to and from the electric motor (6) are provided on the hydraulic block (20) on a virtual arc around the non-human-powered cylinder bore (8') such that the hydraulic block (20) penetrates the hydraulic block (20) from the motor surface (24) to the valve surface (25).

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