Hydraulic block for hydraulic unit of electro-hydraulic two-channel non-manual brake system

Abstract

The present invention relates to a hydraulic block (2) for a hydraulic unit (1) for an electrohydraulic dual-system non-human-powered brake device for an automobile that runs autonomously on public roads. The invention proposes connecting two chambers (11, 12) of a non-human cylinder bore (4) in a hydraulic block (2) by a check valve (20) and in parallel by a bypass line (21) to a chamber of a brake fluid container (16) arranged on the hydraulic block (2). The invention allows for the suction and replenishment of brake fluid when a non-human cylinder (3) is operated.

Description

Technical Field

[0001] The present invention relates to a hydraulic block for a hydraulic unit of an electro-hydraulic two-circuit non-manual braking device, which has the characteristics of the upper concept part of claim 1.

Background Art

[0002] An electro-hydraulic non-manual braking device generates a hydraulic braking pressure for operating a hydraulic wheel brake by non-manual means. For this purpose, for example, a non-manual piston is slid within a non-manual cylinder via a screw transmission mechanism by an electric motor.

[0003] Patent Document 1 discloses an electro-hydraulic two-circuit non-manual braking device having a hydraulic block. The hydraulic block includes a main brake cylinder operable by muscular force and a non-manual cylinder. The non-manual cylinder is arranged parallel to the axis with respect to the main brake cylinder. The non-manual cylinder has a non-manual cylinder bore, and two non-manual pistons arranged axially one behind the other are slidably arranged axially within the non-manual cylinder bore, which is known from a two-circuit main brake cylinder. Different from the main brake cylinder operable by muscular force, in order to generate a hydraulic braking pressure within a known vehicle braking device, one of the two non-manual pistons is slid within the non-manual cylinder bore non-manually by an electric motor via a cylindrical gear transmission mechanism as a reduction transmission mechanism and a ball screw mechanism. Two brake fluid containers are arranged on the hydraulic block. One of the two brake fluid containers communicates with the main brake cylinder within both brake circuits, and the other brake fluid container communicates with the non-manual cylinder within both brake circuits.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0005] The hydraulic block according to the present invention, having the features of claim 1, is provided for a hydraulic unit for an electro-hydraulic two-system non-human-powered brake system, and the hydraulic block comprises components provided for this purpose to form a hydraulic unit. In order to generate hydraulic brake pressure non-humanly, the hydraulic block according to the present invention is provided with a non-human-powered cylinder bore, and two non-human-powered pistons are slidably arranged within the non-human-powered cylinder bore. In order to generate braking force, the first non-human-powered piston of the two non-human-powered pistons is slid within the non-human-powered cylinder bore of the hydraulic block by an electric motor via a screw transmission mechanism, preferably via a reduction transmission mechanism, and in doing so generates hydraulic brake pressure in the first brake circuit. The second non-human-powered piston of the two non-human-powered pistons is biased by the brake pressure generated by the first non-human-powered piston, thereby generating brake pressure in the second brake circuit. Although the first non-human-operated piston is slid by non-human force instead of muscle force, the function of the non-human-operated cylinder bore is equivalent to the function of the conventional two-system main brake cylinder.

[0006] The hydraulic block according to the present invention comprises two connections for a brake fluid container, through which the brake fluid container communicates with a non-manual cylinder bore. Each of the two connections is connected to the non-manual cylinder bore of the hydraulic block through a check valve that allows fluid to flow from the direction of the brake fluid container connection towards the non-manual cylinder bore, and through a bypass pipeline hydraulically parallel to the check valve. The check valve allows brake fluid to be drawn from the brake fluid container into the non-manual cylinder bore when the non-manual cylinder is operated, so as not to push the brake fluid out of the non-manual cylinder bore into the brake fluid container when the non-manual cylinder is operated, and so as not to allow hydraulic brake pressure to be generated in the non-manual cylinder bore by the sliding of the non-manual piston.

[0007] The hydraulic block or hydraulic unit according to the present invention is designed for autonomous driving of vehicles on public roads up to Level 4 and Level 5 of automation. Level 4 signifies high automation, meaning that the vehicle's operation is handled by the system, and the system can require the driver to take over when it is no longer able to perform the driving task. Level 5 is the highest level, meaning full automation, which means that the driver is not required. Such a vehicle may not have a steering wheel and pedals, but this does not preclude the presence of a steering wheel and pedals. The hydraulic block or hydraulic unit can also be used for lower levels of automation and for non-autonomous driving.

[0008] While it is true that the hydraulic block according to the present invention is not designed to additionally include a main brake cylinder or a main brake cylinder bore, the present invention does not preclude the provision of a main brake cylinder or a main brake cylinder bore within the hydraulic block.

[0009] The dependent claims cover the advanced forms and advantageous configurations of the invention described in the independent claims.

[0010] All features disclosed in the specification and drawings can be realized in embodiments of the present invention, either individually or in virtually any combination. It is also possible, in principle, for an invention to have only one or more features, rather than all of the features of a single claim or embodiment of the present invention.

[0011] The present invention will be described in more detail below based on one embodiment shown in the drawings. [Brief explanation of the drawing]

[0012] [Figure 1] This is an axial cross-sectional view of the hydraulic block of the hydraulic unit according to the present invention, passing through a non-manual cylinder bore. [Figure 2] Figure 1 is a perspective view of the hydraulic unit shown. [Figure 3] This is a side view of a hydraulic unit having a hydraulic block according to a second embodiment of the present invention. [Figure 4] Figure 3 is a perspective view of the hydraulic unit. [Modes for carrying out the invention]

[0013] The same component will be represented by the same reference numeral throughout the entire drawing.

[0014] The hydraulic unit 1 shown in Figures 1 and 2 is designed to generate hydraulic brake pressure non-human (external) within a slip-control type hydraulic two-channel non-human brake system (otherwise not shown). A slip control unit (not shown), particularly having a solenoid valve and a hydraulic pump, is connected to the hydraulic unit 1 via a brake line. The hydraulic wheel brakes of the vehicle's brake system are connected to this slip control unit via a brake line. The slip control unit (not shown) is used to adjust the brake pressure during slip control. Such slip control systems include, for example, anti-lock braking systems, anti-slip regulation, and / or vehicle dynamics control, commonly abbreviated as ABS, ASR, and / or FDR. Slip control is well known and will not be described further here.

[0015] The hydraulic unit 1 is provided for an electro-hydraulic dual-channel non-human-operated braking system for autonomous road-driving vehicles up to Level 4 and Level 5 of automation. Level 4 signifies high automation, meaning that vehicle control is performed by the system, and the system can require the driver to take over when it can no longer perform the driving task. Level 5 is the highest level, meaning full automation, which means that a driver is not required. Such a vehicle may not have a steering wheel and pedals, but this does not preclude the presence of a steering wheel and pedals. It is obvious that the hydraulic unit 1 according to the present invention may be used to generate brake pressure non-humanly within a vehicle braking system for lower levels of automation and even for non-autonomous driving.

[0016] While manual (muscle) operation of the vehicle's braking system is certainly not intended, this invention does not exclude it.

[0017] The hydraulic unit 1 has a hydraulic block 2 according to the present invention, and the hydraulic block 2 is configured to be equivalent to a conventional main brake cylinder that can be operated by muscle force, but with the condition that the hydraulic brake pressure that operates the vehicle brake system is generated by a non-human force instead of muscle force.

[0018] The hydraulic block 2 forms or comprises a non-manual cylinder 3, the non-manual cylinder 3 having a non-manual cylinder bore 4, one end of the non-manual cylinder bore 4 being closed (not shown) or pressure-tightly closed by a closing cap 5, and the other end of the non-manual cylinder bore 4 being open.

[0019] Within the non-human-operated cylinder bore 4, two pistons, referred to here as non-human-operated pistons 6 and 7, are arranged to move axially back and forth and to be slidable in the axial direction, and both non-human-operated pistons are movable relative to each other in the axial direction.

[0020] To generate hydraulic brake pressure without human intervention, the first non-human-operated piston 6, one of the two non-human-operated pistons, which is closer to the open end of the non-human-operated cylinder bore 4, is slidable axially within the non-human-operated cylinder bore 4 via a screw transmission mechanism 9 by an electric motor 8. In this embodiment, a planetary drive mechanism is positioned between the electric motor 8 and the screw transmission mechanism 9 as a reduction transmission mechanism 10. The screw transmission mechanism 9 schematically shown in Figure 1 is a ball screw mechanism in this embodiment, but other screw transmission mechanisms, or more generally, a rotation / translation conversion transmission mechanism that converts the rotational motion of the electric motor 8 into translation that slides the first non-human-operated piston 6, can also be used (not shown). In this embodiment, the first non-manual piston 6 is a tubular, hollow piston that is closed at the end furthest from the electric motor 8. A screw drive mechanism 9 is partially located inside this first non-manual piston 6, and the screw drive mechanism 9 partially protrudes from this first non-manual piston 6 toward the electric motor 8.

[0021] The electric motor 8 is positioned coaxially with respect to the non-manual cylinder bore 4, at the open end of the non-manual cylinder bore 4, on the hydraulic block 2 or the non-manual cylinder 3. In this embodiment, the reduction gear transmission mechanism 10, shown as a circuit symbol in Figure 1, is also positioned coaxially with respect to the non-manual cylinder bore 4, between the electric motor 8 and the screw transmission mechanism 9.

[0022] The screw transmission mechanism 9 is (depending on the structure, the spindle or nut of the screw transmission mechanism 9) rigidly connected to the first non-powered piston 6. On the one hand, a pushing force directed towards the closed end of the non-powered cylinder bore 4 or towards the closing cap 5 to generate a hydraulic braking pressure, and on the other hand, a pulling force directed in the opposite direction, is applied to the first non-powered piston 6 towards the electric motor 8. In the basic position where the vehicle braking device is not operated and the non-powered cylinder bore 4 is at zero pressure, the screw transmission mechanism 9 can act on the first non-powered piston 6 to slide it back to the basic position occupied by the first non-powered piston 6. Since the first non-powered piston 6 can be pulled back within the non-powered cylinder bore 4 by the electric motor 8 via the screw transmission mechanism 9 to its basic position, a piston spring for sliding the first non-powered piston 6 back is not required and does not exist in this embodiment either. However, the present invention does not exclude a piston spring for the first non-powered piston 6, and the piston spring may be arranged, for example, in the form of a compression coil spring, between the first non-powered piston 6 and the other, second non-powered piston 7 (not shown).

[0023] The second non-powered piston 7, as a so-called floating piston, is urged by the hydraulic braking pressure generated between the first non-powered piston 6 and the second non-powered piston 7 within the non-powered cylinder bore 4 in the first chamber 11 of the non-powered cylinder 3 where the first non-powered piston 6 is located. Due to this pressure urging, the second non-powered piston 7 also generates a hydraulic braking pressure within the second chamber 12 of the non-powered cylinder 3 within the non-powered cylinder bore 4 between the closed end of the non-powered cylinder bore 4 or the closing cap 5 and the second non-powered piston 7.

[0024] Between the second non-manpower piston 7 and the closed end of the non-manpower cylinder bore 4 or the closing cap 5, in this embodiment, a compression coil spring is arranged as the piston spring 13. The piston spring 13 biases the second non-manpower piston 7 toward the first non-manpower piston 6 and toward the electric motor 8, and thus toward the basic position of the second non-manpower piston 7 where the vehicle braking device is not operated and the non-manpower cylinder bore 4 is at no pressure.

[0025] In this embodiment, the second non-manpower piston 7 has a retainer ring 14 that projects in a flange shape radially outward in a groove that surrounds it. This retainer ring 14 cooperates with a diameter step that is radially stepped down provided in the non-manpower cylinder bore 4. This diameter step provided in the non-manpower cylinder bore 4 forms a stroke stopper 15 for the second non-manpower piston 7. The stroke stopper 15 restricts the sliding of the second non-manpower piston 7 toward the first non-manpower piston 6 and the electric motor 8, and defines the basic position of the second non-manpower piston 7 by the abutment of the retainer ring 14 against the stroke stopper 15.

[0026] The hydraulic block 2 or the non-manpower cylinder 3 according to the present invention includes, for each chamber 11, 12, a connection part for the brake pipeline that is invisible in the drawing. The brake pipeline hydraulically connects a slip control unit (not shown) to the non-manpower cylinder 3 within each brake circuit, or, when there is no slip control unit, conducts to a hydraulic wheel brake (also not shown) of the vehicle braking device. In the basic position of the second non-manpower piston 7, the piston spring 13 has a preload, and thus cannot fall off from the pre-given position of the piston spring 13, and does not require a so-called "restraint", that is, an additional fixture for holding the piston spring 13 in its position.

[0027] On the hydraulic block 2 according to the present invention, which forms or has a non-human-operated cylinder 3, a brake fluid container 16 having two chambers is arranged, as is known from conventional, muscle-operated main brake cylinders. Each of the two chambers of the brake fluid container 16 has its own connecting nipple 17, which protrudes outward or downward from the bottom of the brake fluid container 16 and is sealed by a seal 18 and is located in each of the connecting portions 19 for the brake fluid container 16 provided within the hydraulic block 2. The connecting portions 19 for the brake fluid container 16 are holes that are stepped in diameter section by section, and these holes open into the two chambers 11, 12 of the non-human-operated cylinder 3, so that the two chambers of the brake fluid container 16 communicate with the two chambers 11, 12 in the non-human-operated cylinder hole 4 through these holes. These holes are positioned and configured such that they are always in communication with the chambers 11 and 12 of the non-manual cylinder 3, even when both non-manual pistons 6 and 7 are slid to their maximum extent toward the closed end or closing cap 5 of the non-manual cylinder hole 4.

[0028] The stepped diameter of the holes forms a housing for one check valve 20, and the check valves 20 connect the non-manual cylinder holes 4 to the brake fluid container 6. The check valves 20, shown as circuit symbols in Figure 1, are capable of flowing through the non-manual cylinder holes 4 and prevent the brake fluid from being pushed out of the non-manual cylinder holes 4 into the brake fluid container 16 when generating hydraulic brake pressure. In other words, both check valves 20 enable the generation of hydraulic brake pressure within the non-manual cylinder holes 4.

[0029] The housing for the check valve 20 or the check valve 20 itself is located within the hydraulic block 2 coaxially with respect to the connection portion 19 for the brake fluid container 16 and radially with respect to the non-manual cylinder bore 4, but this is not essential to the present invention.

[0030] In this invention, the hydraulic block 2 is equipped with a bypass pipeline 21, which connects both chambers of the brake fluid container 16 to both chambers 11 and 12 of the non-manual cylinder bore 4, while bypassing the check valve 20. The bypass pipeline 21 has a hole 22 inside the hydraulic block 4, which extends parallel to the hole in which the check valve 20 is located, and opens into the non-manual cylinder bore 4 at the point where the bypass pipeline 21 is open when both non-manual pistons 6 and 7 are in their basic positions. As the two non-operated pistons 6 and 7 slide within the non-operated cylinder bore 4 toward the closed end of the non-operated cylinder bore 4 or toward the closing cap 5 in order to generate hydraulic brake pressure, the non-operated pistons 6 and 7 overcome the opening of the bore 22 such that they block the bypass pipeline 21 in the form of a so-called piston valve or spool valve, thereby enabling the generation of brake pressure. To enable the generation of brake pressure when the non-operated pistons 6 and 7 slide from their basic position, another valve provided within the two non-operated pistons 6 and 7, such as a so-called center valve known from conventional main brake cylinders, is also possible (not shown).

[0031] Starting from the connection part 19 for the brake fluid container 16, the inclined hole 23, which is not closed by the connection nipple 17 of the brake fluid container 16 and is electrically connected to the hole 22, serves as a component of the bypass pipeline 21, connecting the hole 22 to the connection part 19 for the brake fluid container 16.

[0032] Hole 22 is closed, for example, by a press-fitted ball 24, on the opposite side of the opening of the inclined hole 23 from the non-manual cylinder hole 4. The bypass conduit 21 may be configured differently from that described herein and from those shown in Figure 1, as long as it is configured in accordance with the present invention.

[0033] The check valve 20 is configured such that when the non-operated pistons 6 and 7 are operated, they slide from their basic positions toward the closed end of the non-operated cylinder bore 4 or the closing cap 5, thereby enabling the brake fluid to be drawn from the brake fluid container 16 into the non-operated cylinder bore 4 and supplied when the bypass pipeline 21 is blocked.

[0034] The hydraulic unit 1 has an electronic control device 25, which is shown as a circuit symbol in Figure 1, is housed in a housing 26, and is located at the end of the electric motor 8 furthest from the hydraulic block 2. The control device 25 controls or adjusts the electric motor 8. The control device 25 may be located elsewhere on the electric motor 8 or on the hydraulic block 2 (not shown).

[0035] The hydraulic block 2 according to the present invention comprises two non-human-operated pistons 6 and 7, an electric motor 8, a screw transmission mechanism 9, and a reduction transmission mechanism 10, thereby forming a hydraulic unit 1. The brake fluid container 16 may also be considered a component of the hydraulic unit 1.

[0036] The hydraulic unit 1 shown in Figures 3 and 4, like the hydraulic unit 1 shown in Figures 1 and 2, is designed to generate hydraulic brake pressure non-manually within a slip-control type electro-hydraulic two-channel non-manual braking system (other details not shown). This hydraulic unit 1 can be used for autonomous driving up to levels 4 and 5. Unlike the hydraulic unit 1 shown in Figures 1 and 2, the hydraulic unit 1 shown in Figures 3 and 4 has slip control such as an anti-lock braking system, anti-slip regulation and / or vehicle dynamics control.

[0037] The hydraulic block 2 of the hydraulic unit 1 shown in Figures 3 and 4, as configured according to the present invention, matches the hydraulic block 2 of the hydraulic unit 1 shown in Figures 1 and 2, and is equipped with a non-manual cylinder bore 4. Two non-manual pistons 6 and 7 are slidable within the non-manual cylinder bore 4. The first non-manual piston 6 of the non-manual pistons 6 and 7 is slidable via an electric motor 8 through a screw transmission mechanism 9, and optionally via a reduction transmission mechanism 10, in order to generate hydraulic brake pressure within the non-manual cylinder bore 4 without human intervention. A brake fluid container 16 is arranged on the hydraulic block 2, and the chambers of the brake fluid container 16 are isolated from each other within each brake circuit and communicate with chambers 11 and 12 in the non-manual cylinder bore 4 via a check valve 20 and a bypass pipeline 21. The structure and function of the hydraulic unit 1 and hydraulic block 2 shown in Figures 1 and 2 and Figures 3 and 4 are consistent in this respect, so the explanation of Figures 3 and 4 can be explained by referring to the previous explanation of Figures 1 and 2.

[0038] The hydraulic block 2 shown in Figures 3 and 4 is larger so that, in addition to the non-manual cylinder bore 4, a solenoid valve 27, one or more hydraulic pumps 28, and further components of slip control, such as a check valve and a hydraulic accumulator, can be housed within the hydraulic block 2. In this embodiment, the hydraulic block 2 shown in Figures 3 and 4 is rectangular in shape in the region of the non-manual cylinder bore 4 where the hydraulic block 2 forms the non-manual cylinder 3, and extends downward, i.e., on the side opposite to the brake fluid container 16. Viewed axially with respect to the non-operated cylinder bore 4, the hydraulic block 2 shown in Figures 3 and 4 is L-shaped, with a brake fluid container 16 positioned on the horizontal side of this "L". This horizontal side forms a non-operated cylinder 3 having the non-operated cylinder bore 4, and the side of the "L" extending downward from the lower surface of the non-operated cylinder 3, opposite to the brake fluid container 16, is one piece with the non-operated cylinder 3 and constitutes a slip control component.

[0039] The hydraulic block 2 shown in Figures 3 and 4 has a housing for the slip control solenoid valve 27 within a valve surface 31 that is adjacent to the upper surface 30. The surface of the hydraulic block 2 on which the brake fluid container 16 is located is referred to as the upper surface 30. The housing for the solenoid valve 27 is a blind hole provided within the valve surface 31 of the hydraulic block 2, and the blind hole may have a diameter step and / or a surrounding groove. Within the housing, the hydraulic member of the solenoid valve 27, which can also be considered the valve itself, is arranged under pressure. The movable element 32 and magnetic coil of the solenoid valve 27 protrude vertically outward from the valve surface 31 of the hydraulic block 2. The solenoid valve 27 or the valve itself, as well as its movable element 32 and magnetic coil, are shown in simplified circuit symbols in the figures. The movable elements 32 and magnetic coils of the multiple solenoid valves 27 of the slip control are individually covered by valve domes 33, and these valve domes 33 themselves are collectively covered by a single cover 34. The cover 34 takes the form of a rectangular box with an open side, and with the open side, the cover 34 is positioned on the valve surface 31 of the hydraulic block 2.

[0040] For slip control, the hydraulic block 2 shown in Figures 3 and 4 is equipped with a piston pump having two pump pistons as a hydraulic pump 28. Such a hydraulic pump 28 for slip control is also referred to as a return pump. Each pump piston of the hydraulic pump 28 is assigned to one brake circuit. In this embodiment, both pump pistons are arranged coaxially in a pump bore 35, which penetrates the hydraulic block 2 below the non-manual cylinder 3 and, in this embodiment, below the housing for the solenoid valve 27, parallel to the non-manual cylinder bore 4.

[0041] For the stroke drive of both pump pistons, the hydraulic pump 28 or piston pump has an eccentric body, which is not visible in the drawing, and is located in the pump bore 35 between the two pump pistons. The axis of rotation of the eccentric body intersects the axis of the pump bore 35 radially. Coaxial with the axis of rotation of the eccentric body, a second electric motor 36 is located on the outside of the hydraulic block 2, on the motor surface 37 of the hydraulic block 2, which is on the opposite side of the valve surface 31. Through the eccentric body, the second electric motor 36 drives both pump pistons to cause a stroke motion that reciprocates axially within the pump bore 35, thereby pressurizing the brake fluid.

[0042] Here, the cover 34 has a second electronic control device 38 within the wall of the hydraulic block 2 that is furthest from the valve surface 31 and parallel to the valve surface 31, which is referred to as the bottom of the cover 34. The second electronic control device 38 is shown in a simplified circuit symbol in Figure 3. The second electronic control device 38 controls the second electric motor 36 of the slip control hydraulic pump 28 and the slip control solenoid valve 27, thereby performing slip control of the vehicle brake system. Here, there is no distinction between control and adjustment; "control" is understood as "adjustment" and vice versa.

[0043] In the event of an error or failure of the non-human-operated cylinder 3 or electric motor 8, which slides non-human-operated pistons 6, 7 within the non-human-operated cylinder bore 4 to generate hydraulic brake pressure, the hydraulic brake pressure is generated by the slip-control hydraulic pump 28. Regarding the generation of hydraulic brake pressure by non-human operation, this creates redundancy, and the hydraulic brake pressure required for brake operation is selectively generated by either the non-human-operated cylinder 3 or the hydraulic pump 28, and in the event of an error or failure in the slip-control area, slip control is no longer possible. Redundancy is also created in the control or adjustment of the hydraulic unit 1 by both electronic control devices 25, 38. Each electronic control device 25, 38 and each electric motor 8, 36 are provided with their own current supply units (not shown).

[0044] The hydraulic block 2 shown in Figures 3 and 4 includes four brake line connections 39 for a hydraulic wheel brake (not shown) of the vehicle brake system. The brake line connections 39 are recesses, which in the illustrated embodiment of the present invention are located within the valve surface 31 of the hydraulic block 2, above the cover 34. The brake line connections 39 are located within the valve surface 31, between the top surface 30 and the cover 34, on a hypothetical straight line parallel to the non-manual cylinder bore 4. This arrangement of the brake line connections 39 is certainly planned for the hydraulic unit 1 or hydraulic block 2 according to the present invention shown in Figures 3 and 4, but is not essential to the present invention in any case. Other arrangements of the brake line connections 39 within the valve surface 31 and / or in another surface of the hydraulic block 2 are also possible. The hydraulic wheel brake is connected to the hydraulic block 2 or hydraulic unit 1 (not shown) through brake lines by threaded nipples or press-fit nipples provided on the brake line connections 39.

[0045] The hydraulic block 2 comprises non-human-operated pistons 6, 7, two electric motors 8, 36, a screw drive mechanism 9, a hydraulic pump 28, two electronic control devices 25, 38, a brake fluid container 16 if applicable, and other components if applicable, to form a hydraulic unit 1. [Explanation of Symbols]

[0046] 1. Hydraulic Unit 2. Hydraulic block 3 Non-human-operated cylinder 4 Non-manual cylinder bore 5. Closing cap 6. First non-human-powered piston 7. Second non-human-powered piston 8 Electric motor 9. Screw transmission mechanism 10 Reduction transmission mechanism 11 First Chamber 12 Second Chamber 13 Piston spring 14 Retainer Rings 15-step stopper 16 Brake fluid container 17. Connecting nipple 18 stickers 19 Connection part 20 Check valve 21 Bypass pipeline 22 holes 23 Diagonal hole 24 balls 25 Electronic control devices 26 Housing 27 Solenoid valve 28. Hydraulic pump 30 Top side 31 Valve surface 32 Mover 33-valve dome 34 Cover 35 pump holes 36. Second electric motor 37 Motor side 38. Second electronic control device 39 Brake line connection

Claims

1. A hydraulic block for a hydraulic unit of an electro-hydraulic two-channel non-human-operated brake system, It is equipped with a non-human-operated cylinder bore (4), and two non-human-operated pistons (6, 7) are slidably arranged within the non-human-operated cylinder bore (4). The hydraulic block (2) is provided with two connection parts (19) for the brake fluid container (16), and the connection parts (19) communicate with the non-manual cylinder bore (4). In a hydraulic block, Within the hydraulic block (2), a check valve (20) is positioned between the connection portion (19) for the brake fluid container (16) and the non-manual cylinder hole (4), allowing fluid to flow through toward the non-manual cylinder hole (4). The check valve (20) connects the non-manual cylinder hole (4) to the connection portion (19) for the brake fluid container (16), and The hydraulic block (2) is equipped with a bypass pipeline (21), and the bypass pipeline (21) connects the connection part (19) for the brake fluid container (16) to the non-manual cylinder hole (4) in parallel with the check valve (20) in a hydraulic manner. The bypass conduit (21) has a hole (22) parallel to the connection portion (19) for the brake fluid container (16), and an oblique hole (23) coming from the connection portion (19) for the brake fluid container (16) opens into the hole (22). A hydraulic block for a hydraulic unit of an electro-hydraulic two-channel non-human-operated braking system, characterized by the above.

2. The hydraulic block according to claim 1, characterized in that when the non-operated pistons (6, 7) are moved from their basic position when the non-operated cylinder (3) is not being operated, the bypass pipeline (21) is shut off.

3. The hydraulic block according to claim 1 or 2, characterized in that the check valve (20) is arranged coaxially with respect to the connection portion (19) for the brake fluid container (16) within the hydraulic block (2).

4. The hydraulic block according to claim 1 or 2, wherein an electric motor (8) is arranged in the hydraulic block (2), a screw drive mechanism (9) is arranged in contact with the hydraulic block (2) or inside the hydraulic block (2), the screw drive mechanism (9) is rotationally driveable by the electric motor (8), and when rotationally driven, the first non-human drive piston (6) of the two non-human drive pistons is slid within the non-human drive cylinder bore (4) in order to generate hydraulic brake pressure non-humanly.

5. The hydraulic block according to claim 4, characterized in that the first non-human-operated piston (6) is coupled to the screw transmission mechanism (9) so as to be able to transmit pushing and pulling forces.

6. The hydraulic block according to claim 5, characterized in that the first non-human-operated piston (6) does not have a piston spring that biases the first non-human-operated piston (6) to its basic position.

7. The hydraulic block according to claim 4, characterized in that an electronic control device (25) for controlling the electric motor (8) is provided in the electric motor (8).

8. The hydraulic block according to claim 1 or 2, wherein the second non-manual piston (7) of the two non-manual pistons has a stroke stopper (15), and the stroke stopper (15) defines the basic position of the second non-manual piston (7).

9. The hydraulic block (2) is characterized by comprising a housing for a solenoid valve (27) for adjusting brake pressure, as described in claim 1 or 2.

10. The hydraulic block (2) is characterized by comprising a hydraulic pump (28) that redundantly generates the hydraulic brake pressure, as described in claim 1 or 2.

11. The hydraulic block (2) is characterized by comprising a piston pump as a hydraulic pump (28) and a pump port (35) for the piston pump, as described in claim 10.

12. The hydraulic block according to claim 7, wherein the hydraulic block (2) comprises a second electronic control device (38) for controlling a solenoid valve (27) for adjusting brake pressure and / or a hydraulic pump (28) for redundantly generating the hydraulic brake pressure.

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