CUBIC-SHAPED HYDRAULIC BLOCK FOR A HYDRAULIC UNIT OF A BRAKE PRESSURE CONTROL SYSTEM OF A HYDRAULIC VEHICLE BRAKE SYSTEM

Description

[0001] The invention relates to a hydraulic block for a hydraulic unit of a brake pressure control of a hydraulic vehicle brake system with the features of the preamble of claim 1. The hydraulic block is intended in particular for a vehicle brake system having external power and / or slip control. State of the art

[0002] German Patent Application DE 10 2016 202 113 A1 discloses a cuboid-shaped hydraulic block for a hydraulic unit of a brake pressure control system of a hydraulic vehicle brake system. The hydraulic block has a valve side adjacent to a top side of the hydraulic block and in which receptacles for solenoid valves of the brake pressure control system are arranged. Receptacles for outlet valves are arranged offset in a longitudinal direction of the top side of the hydraulic block and transversely to the top side of the hydraulic block in the valve side of the hydraulic block.

[0003] Cuboid-shaped hydraulic blocks for hydraulic units of brake pressure control systems are also known from WO 2018 / 166687 A1 and WO 2019 / 105837 A1. Disclosure of the invention

[0004] The hydraulic block with the features of claim 1 is intended for a hydraulic unit of a brake pressure control system of a hydraulic vehicle brake system. In particular, the hydraulic block according to the invention is intended for a vehicle brake system having a slip control and / or a power-driven vehicle brake system. Brake pressure control means the generation and control of a brake pressure in the vehicle brake system, in brake circuits of the vehicle brake system, and / or in hydraulic wheel brakes of the vehicle brake system connected to the hydraulic block. It can, in particular, also include a slip control system. Slip control systems include, for example, anti-lock brakes, traction control, and / or vehicle dynamics control systems, for which the abbreviations ABS, ASR, and / or FDR are commonly used. Slip control systems are known and will not be explained here.

[0005] The hydraulic block serves to mechanically attach and hydraulically interconnect hydraulic components of the vehicle braking system, brake pressure generation and / or brake pressure control and / or slip control. Such hydraulic components include solenoid valves, check valves, hydraulic accumulators, damper chambers, and pressure sensors. The hydraulic components are mounted in receptacles in the hydraulic block, which are usually designed as cylindrical counterbores, blind holes, or through holes, sometimes with stepped diameters. "Interconnected" means that the receptacles or the hydraulic components mounted in them are connected by lines in the hydraulic block according to a hydraulic circuit diagram of the vehicle braking system. However, the lines are typically not necessarily drilled into the hydraulic block.

[0006] Equipped with the hydraulic components of the vehicle's braking system or its slip control, the hydraulic block forms the hydraulic unit, where "equipped" means that the hydraulic components are fastened in the respective receptacles of the hydraulic block.

[0007] In addition, the hydraulic block has, in particular, connections for brake lines leading to the hydraulic wheel brakes of the vehicle's braking system. It can also have connections for brake lines leading from a master brake cylinder; however, the master brake cylinder is preferably integrated into the hydraulic block, meaning that the hydraulic block has, for example, a master brake cylinder bore.

[0008] The invention is particularly directed to the arrangement of the hydraulic components or their receptacles and their hydraulic connection in the hydraulic block.

[0009] To save space, the inlet and / or outlet valves of the slip control system are arranged in a space-saving manner, with their receptacles in the hydraulic block not arranged in a straight line next to each other, but also offset transversely to their arrangement. For example, receptacles for inlet valves are arranged alternately on two parallel straight lines in the hydraulic block instead of one. And / or, for example, a receptacle for an outlet valve is arranged transversely offset from other receptacles for outlet valves in the hydraulic block that are arranged on a straight line.

[0010] According to the invention, the hydraulic block has a master brake cylinder bore with two circumferential sealing grooves for piston seals for a master brake cylinder piston, wherein a receptacle for an outlet valve communicates directly with the master brake cylinder bore through a line which leads coaxially through a base of the receptacle, radially or in a secant direction, between the two sealing grooves into the master brake cylinder bore.

[0011] Preferably, the hydraulic block according to the invention has an external power cylinder bore for generating the brake pressure with external power and / or a simulator cylinder bore or a receptacle for a pedal travel simulator.

[0012] A brake fluid reservoir is placed on a side of the hydraulic block, referred to here as the top side, which is preferably a narrow side of the hydraulic block. For this purpose, the hydraulic block has one or more connections for the brake fluid reservoir in the top side. To fasten the brake fluid reservoir to the top side of the hydraulic block, one embodiment of the invention provides a recess in a side of the hydraulic block adjacent to the top side, which recess extends up to the top side. A fastening tab, for example, protrudes from an underside of the brake fluid reservoir and can be secured in the recess with a screw, for example, without a screw head or another part of the fastening protruding above a surface of the adjacent side of the hydraulic block.This does not prevent the insertion of an electrical connector provided on the adjacent side for contacting a brake pressure control control unit.

[0013] For connection to the power cylinder bore, one embodiment of the invention provides a line in the hydraulic block that leads from one of the connections for the brake fluid reservoir in the top side to the power cylinder bore. This line runs axially or axially parallel from one connection of the brake fluid reservoir to the power cylinder bore, along which it runs parallel after an external bend and opens into the power cylinder bore with a further bend. In this way, the power cylinder bore can be connected to the brake fluid reservoir with just a few bends. A check valve through which flow can take place in the direction of the power cylinder bore can be provided in the line, particularly in the connection and immediately after the connection for the brake fluid reservoir.

[0014] The remaining dependent claims relate to further developments and advantageous embodiments of the invention specified in the independent claim.

[0015] Through holes or blind holes referred to here as "lines" or "bores" or as "cylindrical bores" may also be produced by means other than drilling.

[0016] All features disclosed in the description and the drawings can be implemented individually or in any combination in embodiments of the invention. Embodiments of the invention that do not include all, but only one or more, features of a claim or embodiment of the invention are, in principle, possible. Short description of the drawing

[0017] The invention is explained in more detail below with reference to an embodiment illustrated in the drawing. In the drawings: Figure 1 shows a hydraulic circuit diagram of a power-driven vehicle brake system having a slip control; Figure 2 shows a hydraulic block according to the invention in a perspective view with a view of a valve side of the hydraulic block; Figure 3 shows the hydraulic block from Figure 2 with a view of an opposite engine side of the hydraulic block; and Figure 4 a hydraulic unit with the hydraulic block from Figure 2 and 3 in a perspective view looking at the engine side. Embodiment of the invention

[0018] Figure 1shows a hydraulic multi-circuit, namely dual-circuit, externally powered vehicle brake system 1 with two brake circuits I, II and four hydraulic wheel brakes 2, two of which are each connected to a brake circuit I, II. The vehicle brake system 1 has a dual-circuit master brake cylinder 4 that can be actuated with muscle power using a foot brake pedal 3 and an externally powered brake pressure generator 5. The two brake circuits I, II are hydraulically connected in parallel to the master brake cylinder 4 and to the externally powered brake pressure generator 5, with each brake circuit I, II being connected to the master brake cylinder 4 via a respective isolating valve 6 and to the externally powered brake pressure generator 5 via a respective externally powered valve 7.

[0019] In one of the two brake circuits I, i.e. to a chamber of the dual-circuit master brake cylinder 4, a piston-cylinder unit 9 with a spring-loaded piston 10 as a pedal travel simulator 11 is connected via a simulator valve 8.

[0020] The master brake cylinder 4 has a pressureless brake fluid reservoir 12, to which the two chambers or brake circuits I, II of the master brake cylinder 4 are connected. One of the two chambers of the master brake cylinder 4 is connected directly to the brake fluid reservoir 12 via a test valve 13 and, in parallel hydraulically, via a check valve through which flow can pass in the direction of the master brake cylinder 4, and the other chamber of the master brake cylinder 4 is connected directly to the brake fluid reservoir 12.

[0021] The externally powered brake pressure generator 5 has a piston-cylinder unit 14, the piston 15 of which is displaceable in a cylinder 18 of the piston-cylinder unit 14 via a screw drive 17 to generate brake pressure using external power by an electric motor 16. The two brake circuits I, II of the vehicle brake system 1 are connected to the cylinder 18 of the externally powered brake pressure generator 5 via the two externally powered valves 7.

[0022] The cylinder 18 of the piston-cylinder unit 14 of the external brake pressure generator 5 is connected to the brake fluid reservoir 12 by a check valve 19 through which flow can pass in the direction of the cylinder 18, and directly to the brake fluid reservoir 12 by a line 20 without the interposition of a valve. At the beginning of its displacement, the piston 10 of the external brake pressure generator 5 passes over an opening of this line 20, so that the piston-cylinder unit 14 of the external brake pressure generator 5 is hydraulically separated from the brake fluid reservoir 12 upon actuation of the external brake pressure generator 5.

[0023] Each wheel brake 2 is connected to one of the two brake circuits I, II and connected to the unpressurized brake fluid reservoir 12 via an outlet valve 22.

[0024] The power brake pressure generator 5, the inlet valves 21, and the outlet valves 22 form brake pressure control valve assemblies that enable wheel-specific slip control systems such as anti-lock control, traction control, and vehicle dynamics control. These slip control systems are commonly abbreviated to ABS, ASR, and FDR. Such slip control systems are well known and will not be discussed further here.

[0025] In the illustrated and described embodiment of the invention, the isolating valves 6, the external force valves 7, the simulator valve 8, the test valve 13, the inlet valves 21 and the outlet valves 22 are 2 / 2-way solenoid valves, wherein the isolating valves 6, the test valve 13 and the inlet valves 21 are open in their de-energized basic positions and the external force valves 7, the simulator valve 8 and the outlet valves 22 are closed in their de-energized basic positions.

[0026] Pressure sensors 23, 24 are connected to one of the two chambers of the master brake cylinder 4 and to the cylinder 18 of the power brake pressure generator 5. A travel or position sensor 45 for measuring a piston or pedal travel or a piston or pedal position of the master brake cylinder piston 53 or the foot brake pedal 3 is arranged on a pedal rod connecting the foot brake pedal 3 to a master brake cylinder piston 53.

[0027] Service braking is carried out as external power braking with the external power brake pressure generator 5. For this purpose, the external power valves 6 are opened and a brake pressure is generated with the external power brake pressure generator 5, which acts on the wheel brakes 2 through the open inlet valves 21, which are thus actuated.

[0028] During service braking, the master brake cylinder 4 is hydraulically separated from brake circuits I and II by closing the isolation valves 6. It serves as a setpoint transmitter for the brake pressure to be generated by the external brake pressure generator 5. The simulator valve 8 is opened during service braking, allowing the master brake cylinder 4 to displace brake fluid into the pedal travel simulator 11, allowing a piston and pedal travel on the master brake cylinder 4.

[0029] In the event of a malfunction or failure of the external brake pressure generator 5, auxiliary braking is possible by muscle power actuation of the master brake cylinder 4, whereby the isolation valves 6 remain open and the external force valves 7 remain closed.

[0030] The hydraulic components of the vehicle brake system 1 are arranged in and on a hydraulic block 25, which is Figure 2 and 3The hydraulic block 25 is shown transparent so that its bore can be seen. Figure 2 shows a valve side 26 and Figure 3 an opposite motor side 27 of the hydraulic block 25. In the exemplary embodiment, the hydraulic block 25 is a flat, cuboid-shaped metal block which serves for mechanical fastening and hydraulic connection of the hydraulic components of the vehicle brake system 1. Equipped with the hydraulic components, the hydraulic block 25 forms a hydraulic unit 32 of the vehicle brake system 1, which in Figure 4 shown in perspective with a view of the motor side 27. "Flat" means that the hydraulic block 25 is approximately 3 to 4 times as wide or long as it is thick. Two opposite large sides of the hydraulic block 25 are almost square in the illustrated embodiment and form the valve side 26 and the motor side 27.

[0031] In the hydraulic block 25, a master brake cylinder bore 4', which forms the master brake cylinder 4, an external power cylinder bore, which forms the cylinder 18 of the external power brake pressure generator 5, a cylinder bore 28, which forms the cylinder of the piston-cylinder unit 9 of the pedal travel simulator 11, receptacles for the solenoid valves 6, 7, 8, 13, 21, 22, a receptacle for the check valve 19, receptacles for the pressure sensors 23, 24 and connections 29 for the brake fluid reservoir 12 and connections 30 for the hydraulic wheel brakes 2 are attached to the hydraulic block 25 by means of brake lines. The receptacles for the solenoid valves, the check valve and the pressure sensors are in Figure 2 and 3 with the same reference numbers as the respective hydraulic components in Figure 1 supplemented by a "'".

[0032] The receptacles are cylindrical, partially diameter-stepped countersinks or blind holes in the hydraulic block 25. The hydraulic components are inserted into the receptacles and caulked all around to ensure pressure-tightness. Hydraulic sections of the solenoid valves forming the actual valves are located in the receptacles. Armatures and solenoid coils, which are housed in a valve dome, protrude from the valve side 26 of the hydraulic block 1. The connections 29 for the brake fluid reservoir 12 are also blind holes into which connection nipples, which protrude from a base of the brake fluid reservoir 12, are inserted and sealed with sealing rings. The connection bores 30 for the wheel brakes 2 are also blind holes in which the brake lines leading to the wheel brakes 2 are fastened pressure-tight with press-in nipples (not shown) using so-called self-clinching technology. The brake lines can also be connected, for example, using screw nipples.Lines designed as bores in the hydraulic block 1 connect the cylinder bores, receptacles for the hydraulic components and the connections 29, 30 for the brake fluid reservoir 12 and the wheel brakes 2 according to the hydraulic circuit diagram in . Figure 1 each other.

[0033] "Drilled" or "bored" refers to the cylinder bores, receptacles for the solenoid valves, and connection bores located in hydraulic block 1, as well as the bores connecting them and forming lines according to the hydraulic circuit diagram. Hydraulic block 25 is Cartesian drilled, meaning the bores, receptacles, connections, lines, etc., are arranged parallel and perpendicular to each other and to the sides and edges of hydraulic block 25. This does not exclude individual, diagonally running lines and bores. "Equipped" means that the hydraulic components are arranged in their receptacles.

[0034] The brake fluid reservoir 12 is mounted on an upper side 31 of the hydraulic block 25 adjacent to the valve side 26 and the motor side 27 in such a way that the connection nipples on the bottom of the brake fluid reservoir 12 are inserted into the connections 29 in the upper side 31 of the hydraulic block 25. The brake fluid reservoir 12 has three chambers, two of which are connected to the two chambers of the master brake cylinder 4 and one of which is connected via the check valve 19 and the line 20 to the cylinder 18 of the piston-cylinder unit 14 of the external brake pressure generator 5. The connections 29 are arranged one behind the other in a longitudinal direction of the upper side 31 of the hydraulic block 25 and in a somewhat V-shape, i.e. a middle one of the three connections 29 is arranged transversely to the upper side 31 and offset from the other two connections 29 in the upper side 31 of the hydraulic block 25.

[0035] The brake fluid reservoir 12 has two eye plates 33, to which it is fastened with shoulder screws 34 on the top side 31 of the hydraulic block 25 and an eye plate 35 projecting from the bottom, to which it is fastened with a stud screw 36 on the hydraulic block 25 ( Figure 4 ). The stud 36 allows for length compensation in the event of thermal expansion of the hydraulic block 25. The eyelet 35 is located in a recess 37 in a side 38 of the hydraulic block 25 adjacent to the top side 31, the valve side 26, and the motor side 27, which extends to the top side 31. A screw head of the stud 36 is also countersunk in the recess 37, so that nothing protrudes on the side 38.

[0036] On the valve side 26 of the hydraulic block 25, a control unit cover 39 is arranged with an electronic control unit for brake pressure control, which has a multi-pole electrical coupling 40 located on the side 38 of the hydraulic block 25. Due to the countersunk arrangement of the eyelet 35 of the brake fluid reservoir 12, including the stud 36, in the recess 37, the eyelet 35 and the stud 36 do not hinder the insertion and removal of a plug (not shown) into the coupling 40.

[0037] The master brake cylinder bore 4' forming the master brake cylinder 4 is arranged in the hydraulic block 25 at a distance from the top side 31 and parallel to the top side 31 to the valve side 26 and the motor side 27 above a center of the hydraulic block 25.

[0038] The cylinder 18 of the piston-cylinder unit 14 of the external brake pressure generator 5 is mounted perpendicular to the valve side 26 and the motor side 27 in the hydraulic block 25. A raised portion 41 protrudes from the valve side 26 of the hydraulic block 25, into which the cylinder 18 of the external brake pressure generator 5 extends. The cylinder 18 of the piston-cylinder unit 14 of the external brake pressure generator 5 is mounted perpendicular to the master brake cylinder bore 4' and directly adjacent to the master brake cylinder bore 4' in the hydraulic block 25. "Directly adjacent" means that there is no cavity in the hydraulic block 25 between the cylinder 18 of the piston-cylinder unit 14 of the external brake pressure generator 5 and the master brake cylinder bore 4'.

[0039] The cylinder 18 of the piston-cylinder unit 14 of the external brake pressure generator 5 is, as described, connected to the central connection 29 of the brake fluid reservoir 12 via the check valve 19. For this purpose, the line 20 runs coaxially from a base of the connection 29 to almost a circumference of the cylinder 18, from where the line 20 runs at a right angle, axially parallel to the cylinder 18, in the elevation 41 along the outside of the cylinder 18 and opens into the cylinder 18 via a recess 51. The recess 51 is a type of circumferential groove in the cylinder 18 of the external brake pressure generator 5, which extends only over part of the circumference of the cylinder 18. It can also be completely circumferential. In general, the recess 51 can also be understood as an angled portion through which the line 20 opens into the cylinder 18. At the bottom of the connection 29, the check valve 19 is arranged in a diameter widening of the line 20.which forms a receptacle 19' for the check valve 19.

[0040] The cylinder bore 28 of the pedal travel simulator 11 is located directly adjacent to the cylinder 18 of the power brake pressure generator 5, vertically in the valve side 26 of the hydraulic block 25, between the cylinder 18 of the piston-cylinder unit 14 of the power brake pressure generator 5 and a corner of the hydraulic block 25. "Directly adjacent" means that there is no cavity in the hydraulic block 25 between the cylinder bore 28 of the pedal travel simulator 11 and the cylinder 18 of the power brake pressure generator 5.

[0041] Parallel to and close to the master brake cylinder bore 4', the hydraulic block 25 has a considerably thinner bore as a position sensor bore 43 for a master brake cylinder piston (primary or rod piston) 53. The position sensor bore 43 opens on the same side as the master brake cylinder bore 4', in the exemplary embodiment on the fastening side 46 of the hydraulic block 25. A rod-shaped sensor holder extends into the position sensor bore 43. This sensor holder is attached outside the hydraulic block 25 to a piston rod 42 that is connected to the master brake cylinder piston 53 (not shown), so that the sensor holder moves with the master brake cylinder piston 53. A permanent magnet, for example, is attached to the sensor holder as a signal transmitter and is located in the position sensor bore 43.

[0042] Perpendicular to the position sensor bore 43, a blind hole serves as a receptacle 44 for the displacement or position sensor 45 in the hydraulic block 25. The receptacle 44 is located above, i.e., on a side of the position sensor bore 43 facing the top side 31 of the hydraulic block 25 and close to the opening of the position sensor bore 43, or close to the opening of the master brake cylinder bore 4', or close to the mounting side 46 of the hydraulic block 25.

[0043] The master brake cylinder 4 and the position sensor bore 43 are open on a mounting side 46 of the hydraulic block 25, which is adjacent to the valve side 26, the motor side 27, and the upper side 31 and is opposite the side 38 with the recess 37. The mounting side 46 is used to attach the hydraulic block 25 to a bulkhead (not shown) of a motor vehicle, so that the upper side 31 with the brake fluid reservoir 12 is at the top.

[0044] Coaxial with the cylinder 18 of the piston-cylinder unit 14 of the external brake pressure generator 5, the electric motor 16 is arranged on the outside of the motor side 27 of the hydraulic block 25. Coaxial with the electric motor 16 and the cylinder 18, a planetary gear (not shown) serving as a reduction gear and a ball screw drive for converting a rotary drive of the electric motor 16 into a translational movement for displacing the piston 15 of the piston-cylinder unit 14 of the external brake pressure generator 5 are arranged in a motor housing of the electric motor 16 and in the cylinder 18 of the external brake pressure generator 5.

[0045] Between the cylinder 18 of the piston-cylinder unit 14 of the external brake pressure generator 5 and a bottom side 47 of the hydraulic block 25 opposite the top side 31, three through holes extending from the valve side 26 to the motor side 27 are provided in the hydraulic block 25 as motor connection bores 48 for a power supply of the electric motor 16 of the external brake pressure generator 5. The motor connection bores 48 are arranged on an imaginary arc around the cylinder 18 between the cylinder 18 and the bottom side 47 in the hydraulic block 25.

[0046] In addition, the hydraulic block 25 has a signal bore 49 for control lines and / or signal lines to or from the electric motor 16. Through the signal bore 49, for example, a rotation angle sensor 50 of the electric motor 16 can be connected to the electronic control unit, which is arranged in the control unit cover 39 on the valve side 26 of the hydraulic block 25. The signal bore 49 extends from the valve side 26 to the motor side 27 and is arranged between the cylinder 18 of the power brake pressure generator 5 and a corner of the hydraulic block 25, between the mounting side 46 and the underside 47 of the hydraulic block 25.

[0047] The receptacles for the solenoid valves are arranged in the valve side 26 of the hydraulic block 25. The receptacles 21' for the inlet valves 21 are arranged between a base of the connections 29 for the brake fluid reservoir 12 and the master brake cylinder bore 4', adjacent to one another and alternately, with an offset of slightly less than their diameter toward the top side 31 and the master brake cylinder 4 in the valve side 26.

[0048] Of the receptacles 22' for the outlet valves 22, three are mounted next to one another in the valve side 26 of the hydraulic block 25 on an imaginary straight line parallel to the top side 31 at the level of the master brake cylinder bore 4'. These three receptacles 22' for the outlet valves 22 are arranged in an axial plane of the master brake cylinder bore 4' or in a plane parallel to the axial plane of the master brake cylinder bore 4' that intersects the master brake cylinder bore 4'. A first or last receptacle 22' for an outlet valve 22 is mounted in the valve side 26 of the hydraulic block 25, offset toward the top side 31 of the hydraulic block 25. The receptacle 22' closest to the mounting side 46 is offset from the other three receptacles 22' for the outlet valves 22.The receptacles 21' for the inlet valves 21 and the receptacles 22' for the outlet valves 22 for each wheel brake 2 are offset from one another in pairs, i.e. perpendicular to the upper side 31 or parallel to the fastening side 46 of the hydraulic block 25.

[0049] The master brake cylinder bore 4' has two circumferential sealing grooves 54 for each master brake cylinder piston 53, in which piston seals (sealing rings) 55 are arranged. The sealing grooves 54 are only a small axial distance from one another, approximately as large as the width of the sealing grooves 54. The three receptacles 22' for the outlet valves 22, arranged at the level of the master brake cylinder bore 4', communicate directly with the master brake cylinder bore 4' via lines that lead coaxially through a base of the receptacles 22', radially or in a secant direction into the master brake cylinder bore 4'. One of the receptacles 22' for one of the outlet valves 22 is connected to the master brake cylinder bore 4' between two of the sealing grooves 54.

[0050] A receptacle 13' for the test valve 13 is mounted between the receptacles 22' for the outlet valves 22, which are offset from the other receptacles, and the mounting side 46 of the hydraulic block 25 in the valve side 26 of the hydraulic block 25.

[0051] At a center between the receptacles 22' for the outlet valves 22, a shallow recess serving as a receptacle 24' for the pressure sensor 24 for the cylinder 18 of the external brake pressure generator 5 is provided in the valve side 26 of the hydraulic block 25. It communicates through a coaxial bore in its base with the line 20, which leads from the central connection 29 for the brake fluid reservoir 12 to the cylinder 18 of the external brake pressure generator 5.

[0052] A receptacle 23' for the pressure sensor 23 of the master brake cylinder 4 is mounted slightly below the master brake cylinder bore 4' and near its closed end in the valve side 26 of the hydraulic block 25. The receptacle 23' for the pressure sensor 23 communicates directly with the master brake cylinder bore 4' via a line that runs coaxially through the bottom of the receptacle 23' in a secant direction into the master brake cylinder bore 4'.

[0053] Between the receptacle 23' for the pressure sensor 23 of the master brake cylinder 4 and the cylinder 18 of the external brake pressure generator 5, a receptacle 6' for one of the two isolating valves 6 is mounted in the valve side 26 of the hydraulic block 25. The receptacle 6' for the other external valve 6 is mounted on an opposite side of the cylinder 18 of the external brake pressure generator 5, between the cylinder 18 and the mounting side 46 of the hydraulic block 25 in the valve side 26 of the hydraulic block 25.

[0054] Receptacles 7' for the external power valves 7 are mounted on opposite sides of the cylinder 18 of the external power brake pressure generator 5 in the valve side 26 of the hydraulic block 25. One of the two receptacles 7' is located between the receptacle 23' for the pressure sensor 23 of the master brake cylinder 4, and the other receptacle 7' is located on the opposite side of the cylinder 18 between the latter and the mounting side 46 of the hydraulic block 25. The two receptacles 7' for the external power valves 7 communicate with the cylinder 18 of the external power brake pressure generator 5 via a line 52, which runs through the hydraulic block 25 parallel to the top side 31 and perpendicular to the mounting side 46 of the hydraulic block 25.

[0055] A receptacle 8' for the simulator valve 8 is located between the receptacle 23' for the pressure sensor 23 of the master brake cylinder 4 and the cylinder bore 28 of the pedal travel simulator 11, offset from the cylinder bore 28 in the direction of the side 38 of the hydraulic block 25 having the recess 37.

Claims

1. Cuboid hydraulic block for a hydraulic unit of a brake pressure control system of a hydraulic vehicle brake system, wherein the hydraulic block (25) has a valve side (26) which adjoins an upper side (31) of the hydraulic block (25) and in which receptacles (6', 7', 8', 13', 21', 22') for solenoid valves (6, 7, 8, 13, 21, 22) of the brake pressure control system are arranged, wherein receptacles (21') for inlet valves (21) and / or receptacles (22') for outlet valves (22) of the brake pressure control system are arranged in a longitudinal direction of the upper side (31) of the hydraulic block (25) and transversely with respect to the upper side (31) of the hydraulic block (25) offset in the valve side (26) of the hydraulic block (25), and wherein the hydraulic block (25) has a brake master cylinder bore (4') with two circumferential seal grooves (54) for piston seals (55) for a brake master cylinder piston (53), characterized in that that a receptacle (22') for an outlet valve (22) communicates directly through a line with the brake master cylinder bore (4'), which coaxially leads into the brake master cylinder bore (4') through a base of the receptacle (22') radially or in a secant direction between the two seal grooves (54).

2. Hydraulic block according to Claim 1, characterized in that, in the longitudinal direction of the upper side (31) of the hydraulic block (25), receptacles (21') for the inlet valves (21) are arranged alternately transversely with respect to the upper side (31) of the hydraulic block (25) offset in the valve side (26) of the hydraulic block (25), and / or in that a receptacle (22') for an outlet valve (22) is arranged transversely with respect to the upper side (31) of the hydraulic block (25) offset from other receptacles (22') for outlet valves (22) in the valve side (26) of the hydraulic block (25).

3. Hydraulic block according to Claim 1 or 2, characterized in that the receptacles (21') for the inlet valves (21) and the receptacles (22') for the outlet valves (22) for each wheel brake (2) are arranged in pairs perpendicularly with respect to the upper side (31) of the hydraulic block (25) offset from each other in the valve side (26) of the hydraulic block (25), and / or in that the receptacles (21') for the inlet valves (21) and the receptacles (22') for the outlet valves (22) for each wheel brake (2) are arranged in pairs parallel to a fastening side (46) of the hydraulic block (25) offset from each other in the valve side (26) of the hydraulic block (25).

4. Hydraulic block according to one or more of Claims 1 to 3, characterized in that a receptacle (22') for an outlet valve (22) is arranged in an axial plane of the brake master cylinder bore (4') or in a plane parallel to the axial plane of the brake master cylinder bore (4'), which intersects the brake master cylinder bore (4').

5. Hydraulic block according to either of Claims 3 or 4, if Claim 4 is dependent on Claim 3, characterized in that that the hydraulic block (25) has a receptacle (7') for a power assistance valve (7) in the valve side (26) perpendicularly with respect to the upper side (31) and / or parallel to the fastening side (46) of the hydraulic block (25) offset from a receptacle (21') for an inlet valve (21) and / or from a receptacle (22') for an outlet valve (22).

6. Hydraulic block according to either of Claims 3, 4 (if Claim 4 is dependent on Claim 3) or 5, characterized in that the hydraulic block (25) has two receptacles (7') for two power assistance valves (7) in the valve side (26) on both sides next to a cylinder (18) of a power assistance brake pressure generator (5), which are connected to the cylinder (18) by a line (52) which runs in the hydraulic block (25) perpendicularly with respect to the fastening side (46) and / or parallel to the upper side (31) of the hydraulic block (25).

7. Hydraulic block according to one or more of the preceding claims, characterized in that that the hydraulic block (25) has a receptacle (24') for a pressure sensor (24) for a power assistance brake pressure generator (5) in the valve side (26) on one side of the receptacles (21') facing away from the upper side (31) of the hydraulic block (25) for the inlet valves (21) and / or between the receptacles (22') for the outlet valves (22).

8. Hydraulic block according to one or more of the preceding claims, characterized in that the hydraulic block (25) has a cylinder (18) for a power assistance brake pressure generator (5) perpendicularly with respect to the valve side (26) and a connector (29) for a brake fluid reservoir (12) in the upper side (31), from which a line (20) extends in the direction of the cylinder (18) of the power assistance brake pressure generator (5), which passes into a line (20) parallel to the cylinder (18) of the power assistance brake pressure generator (5), which opens with an angle, in particular through a puncture (51), into the cylinder (18) of the power assistance brake pressure generator (5).

9. Hydraulic block according to Claim 8, characterized in that the hydraulic block (25) has three connectors (29) for the brake fluid reservoir (12) in the upper side (31), the central connector (29) of which communicates with the cylinder (18) of the power assistance brake pressure generator (5) in the hydraulic block (25).

10. Hydraulic block according to one or more of the preceding claims, characterized in that the hydraulic block (25) has, in a side (38) adjacent to the upper side (31) and to the valve side (26), a depression (37) reaching to the upper side (31) for fastening a brake fluid reservoir (12) on the upper side (31) of the hydraulic block (25).

11. Hydraulic block according to one or more of the preceding claims, characterized in that the hydraulic block (25) has a position sensor bore (43), parallel to the brake master cylinder bore (4'), for a position sensor for a brake master cylinder piston (53), and a holder (44) for a displacement or position sensor (45), which is located at a distance not exceeding the thickness of the hydraulic block (25) perpendicularly with respect to the valve side (26) from a fastening side (46) adjacent to the upper side (31) and to the valve side (26) of the hydraulic block (25) and / or from the upper side (31) of the hydraulic block (25).