Hydraulic block of a hydraulic assembly of a slip regulation system of a hydraulic vehicle brake system

Abstract

The invention provides that in the opposite sides of the hydraulic block (16) of the hydraulic assembly of the slip regulation system for the hydraulic vehicle brake equipment, the accommodation (14') for the pressure variation damper (14) and the accommodation (15') for the throttle member (15) are staggered with each other, and they are staggered with respect to the accommodation (9') for the hydraulic pump (9), thereby enabling a large volume of the pressure variation damper (14), and thereby enabling a better damping effect.

Description

Technical Field

[0001] The present invention relates to a hydraulic block of a hydraulic assembly for a slip adjustment system of a hydraulic vehicle braking device, wherein the hydraulic block has a housing for a valve for the slip adjustment system and a housing for a hydraulic pump. Background Technology

[0002] This hydraulic block is used for the mechanical fixing and hydraulic connection of hydraulic components in the slip adjustment system of hydraulic vehicle braking equipment. These hydraulic components include solenoid valves, check valves, hydraulic accumulators, pressure change dampers, throttling devices, pressure sensors, and hydraulic pumps. The hydraulic block is connected to the master brake cylinder via one or more brake lines, and the hydraulic wheel brakes are also connected to the hydraulic block via brake lines. Particularly for externally driven vehicle braking equipment, it is known to integrate the master brake cylinder into the hydraulic block, i.e., to carve a master brake cylinder bore into the hydraulic block to accommodate one or more master brake cylinder pistons, rather than connecting the hydraulic block directly to the master brake cylinder.

[0003] Slip adjustment systems include, for example, anti-lock braking systems, anti-slip systems, and / or ride dynamics systems / electronic stability programs, abbreviated as ABS, ASR, and / or FDR / ESP, respectively. These slip adjustment systems are known and will not be described further here. The hydraulic block may also have a housing for an external braking pressure generator, such as a housing for a piston cylinder unit used to generate braking pressure from an external force.

[0004] Hydraulic components are fixed within receptacles in the hydraulic block. These receptacles are mostly constructed as cylindrical through-holes or blind holes, and some are constructed as through-holes or blind holes with gradually changing diameters. "Hydraulic connection" refers to the connection of the receptacles or the hydraulic components fixed therein through pipes in the hydraulic block, according to the hydraulic wiring diagram of the vehicle's braking equipment or its slip adjustment system. These pipes are typically formed by drilling holes in the hydraulic block. The receptacles and the lines connecting them in the hydraulic block are also referred to as openings in the hydraulic block.

[0005] When equipped with hydraulic components for sliding adjustment, the hydraulic block forms a hydraulic assembly, wherein “equipped” means that the hydraulic components are fixed in respective receptacles of the hydraulic block, and are typically pressure-sealed.

[0006] Such a hydraulic block is known from the published document DE 10 2006 059 924 A1. Summary of the Invention

[0007] The hydraulic block according to the invention is used in a hydraulic assembly for slip adjustment of a hydraulic vehicle braking system. Furthermore, the hydraulic block has a housing for valves, particularly for solenoid valves in the slip adjustment system, and a housing for a hydraulic pump, particularly for a so-called return pump. The hydraulic block preferably has a housing for a hydraulic pump for each braking circuit of the vehicle braking system. The hydraulic pump is used to generate braking pressure for the slip adjustment system, and to increase the braking pressure in the wheel brakes of the vehicle braking system after the braking pressure in the wheel brakes decreases, and to return brake fluid from the wheel brakes to the master brake cylinder during slip adjustment. Furthermore, the hydraulic block has a housing for a pressure-changing damper on one side, and a housing for a throttling component on the other side, preferably the opposite side. The pressure-changing damper is connected to the pressure side of the hydraulic pump, and the throttling component is also connected to the pressure side of the hydraulic pump and / or connected to the pressure-changing damper. The pressure variation damper suppresses pressure changes in the brake fluid on the pressure side of the hydraulic pump, particularly suppressing pressure pulsations caused by the oscillating delivery of brake fluid by the hydraulic pump and sudden pressure changes caused by switching the solenoid valve of the slip-regulating system. The housings for the hydraulic pump, pressure variation damper, and / or throttling element are preferably staggered within the hydraulic block, such that they either cross or intersect each other. This staggering of the housing for the pressure variation damper relative to the housings for the hydraulic pump and / or the throttling element allows for a larger volume pressure variation damper, or the ability to mount a larger volume pressure variation damper within the hydraulic block, thereby improving or enhancing its damping effect.

[0008] According to a preferred embodiment of the present invention, the receiving portion for the pressure change damper and the receiving portion for the throttling component are arranged in the opposite side of the hydraulic block.

[0009] According to a preferred embodiment of the present invention, the receiving portion for the pressure change damper and the receiving portion for the throttling component have parallel axes.

[0010] According to a preferred embodiment of the present invention, the receiving portion for the pressure change damper and the receiving portion for the throttling component are offset from each other.

[0011] According to a preferred embodiment of the present invention, the receiving portion for the pressure change damper and the receiving portion for the throttling component intersect or communicate with each other.

[0012] According to a preferred embodiment of the present invention, the receiving portion for the pressure change damper and / or the receiving portion for the throttling component are offset relative to the receiving portion for the hydraulic pump.

[0013] According to a preferred embodiment of the present invention, the hydraulic block has an orifice that connects the pressure side of the hydraulic pump arranged in the housing for the hydraulic pump to the housing for the pressure change damper, and connects the pressure side of the hydraulic pump arranged in the housing for the hydraulic pump and / or the housing for the pressure change damper to the housing for the throttling component.

[0014] All features disclosed in the specification and drawings can be implemented individually or in principle in any combination in embodiments of the invention. Embodiments of the invention that do not possess all the features of the claims or embodiments, but only one or more of them, are also possible in principle. Attached Figure Description

[0015] The invention will now be explained in more detail with reference to the embodiments shown in the accompanying drawings. The drawings show:

[0016] Figure 1 It is a hydraulic circuit diagram of a hydraulic vehicle braking device with slip adjustment;

[0017] Figure 2 It is according to the invention for use Figure 1 A perspective view of the hydraulic block, equipped with some components, of the hydraulic assembly of the vehicle braking system shown.

[0018] Figure 3 It is observed from a different perspective. Figure 2 The illustration shows the hydraulic block without any components; and

[0019] Figure 4 yes Figure 2 and Figure 3 The diagram shows a longitudinal cross-section of the hydraulic block, which passes through the housing for the pressure change damper and the housing for the throttling component. Detailed Implementation

[0020] exist Figure 1 The vehicle braking device 1 shown is configured as a dual-circuit braking device with four hydraulic wheel brakes 2, two of which are connected to one of two braking circuits I and II respectively. The vehicle braking device also has a master brake cylinder 4, which in this embodiment can be operated by muscle force via a foot brake pedal 3. The master brake cylinder may, but is not necessarily, equipped with a brake force amplifier 5.

[0021] Each brake circuit I, II is connected to the master brake cylinder 4 via a release valve 6. Wheel brakes 2 are each connected to the release valve 6 via an inlet valve 7. In each brake circuit I, II, the wheel brake 2 is connected to the suction side of a hydraulic pump 9 via an outlet valve 8, also referred to as a return pump. A hydraulic accumulator 10 and a check valve 11 that allows flow toward the hydraulic pump 9 are arranged between the discharge valve 8 and the hydraulic pump 9. The pressure side of the hydraulic pump 9 is connected between the release valve 6 and the inlet valve 7, allowing the hydraulic pump 9 to, during slip adjustment, either re-inject brake fluid overflowing from the wheel brake 2 through the inlet valve 7 to restore pressure in the wheel brake 2 by opening the outlet valve 8, or to re-inject it back into the master brake cylinder 4 via the release valve.

[0022] The hydraulic pump 9 can be driven together with the electric motor 12. In addition to being connected to the wheel brake 2 via the outlet valve 8, the suction side of the hydraulic pump 9 is connected to the master brake cylinder 4 via the suction valve 13 to quickly build up braking pressure.

[0023] According to the invention, a pressure change damper 14 and a throttling element 15 are disposed on the pressure side of the hydraulic pump 9 and between them at the interface between the separation valve 6 and the inlet valve 7. When the hydraulic pump is configured, for example, as a piston pump, the pressure change damper 14 and the throttling element 15 suppress pressure fluctuations, pressure pulsations, and especially sudden pressure changes in the brake fluid by utilizing the periodic delivery of brake fluid by the hydraulic pump 9 and by switching valves.

[0024] In this embodiment, the valve is a two-position two-way solenoid valve, wherein the disconnect valve 6 and the inlet valve 7 are open in their non-current-driven basic position, and the outlet valve 8 and the suction valve 13 are closed in their non-current-driven basic position. The inlet valve 7 and the outlet valve 8 form a wheel brake pressure modulation valve device, which, together with the hydraulic pump 9, allows for individual adjustment of the wheel brake pressure in the wheel brake 2 during slip regulation. Such slip regulation systems are, for example, anti-lock braking systems, anti-slip systems, and / or ride dynamics systems / electronic stability programs, abbreviated as ABS, ASR, and / or FDR / ESP, respectively. These slip regulation systems are known and will not be explained in detail here.

[0025] Separator valve 6, inlet valve 7, outlet valve 8, hydraulic pump 9, hydraulic accumulator 10, check valve 11, suction valve 13, pressure change damper 14, and throttling component 15 are installed according to the present invention. Figure 2 and Figure 3The hydraulic block 16 shown is equipped with the aforementioned hydraulic components to form a hydraulic assembly for slip adjustment of the hydraulic vehicle braking device 1. The hydraulic block 16 or hydraulic assembly is connected to the master brake cylinder 4 via brake lines, and the wheel brakes 2 are also connected to the hydraulic block 16 or hydraulic assembly via brake lines.

[0026] exist Figure 2 and Figure 3 The hydraulic block 16 according to the invention shown in the figure is, in an embodiment, a cuboid metal block with nearly square large sides, the thickness of which is approximately one-quarter to one-third of its length or width. The hydraulic block 16 has blind holes serving as receptacles for solenoid valves 6, 7, 8, 13, check valve 11, hydraulic accumulator 10, pressure change damper 14, and throttling component 15, and through holes serving as receptacles for hydraulic pump 9. An electric motor 12 is arranged on one of the two large sides of the hydraulic block 16 on the outside; this side is referred to herein as the motor side 30 of the hydraulic block 16. Receptacles for hydraulic components housed in the hydraulic block 16 are indicated by the reference numerals of the corresponding components with an apostrophe (').

[0027] Four blind holes arranged in a row adjacent to each other are cut into the lateral side of the hydraulic block 16, referred to as the interface side 17. These blind holes serve as interfaces 18 for brake lines leading to the wheel brake 2. Similarly, interfaces 19 for the two brake lines from the master brake cylinder 4 are cut into the motor side 30 of the hydraulic block 16 near the interface side 17. Figure 2 The observer facing away from the center is located at the rear, and... Figure 3 The middle part is located at the bottom. The brake line is fixed in the interfaces 18 and 19 by means of threaded or press-fitted fittings, that is, self-clinching, so-called "self-locking" press-fitted fittings, in a pressure-sealed manner. The hydraulic block 16 is in Figure 3 The parts are displayed as transparent, so the housings for hydraulic components and the interfaces 18 and 19 for brake lines are visible.

[0028] The housing for the solenoid valve is located in the large side of the hydraulic block 16 opposite the motor side 30, referred to herein as the valve side 20. More specifically, a total of four housings 7' for the inlet valve 7 are arranged side-by-side in a first valve row parallel to the interface side 17, four housings 8' for the outlet valve 8 are also arranged side-by-side parallel to the interface side 17 in a second valve row, a housing 13' for the suction valve 13 is arranged in a third valve row, and a housing 6' for the disconnect valve 6 is arranged in a fourth valve row, wherein these four valve rows are arranged in the aforementioned order on the valve side 20 of the hydraulic block 16 between the interface side 17 and the opposite transverse side. Between the housings 6' for the disconnect valve 6, the hydraulic block 16 has housings 21' for the pressure sensor 21. In the transverse side opposite the interface side 17, the hydraulic block 16 has blind holes serving as housings 10' for the hydraulic accumulator 10. Through these drilled holes in the hydraulic block 16, the receiving portions for these hydraulic components are connected to each other according to the hydraulic wiring diagram of the vehicle braking device 1. These drilled holes, receiving portions, and interfaces may also be referred to as the orifices of the hydraulic block 16. After these hydraulic components are installed, the hydraulic block 16 constitutes the hydraulic assembly for the slip adjustment system of the vehicle braking device 1, as described.

[0029] The through hole constituting the receiving portion 9' for the hydraulic pump 9 passes through the hydraulic block 16 between the two large sides of the hydraulic block 16, namely parallel to the motor side 30 and the valve side 20, and parallel to the two lateral sides, namely parallel to the interface side 17 and the lateral side opposite to the interface side.

[0030] exist Figure 2 In the middle, a valve cover surrounding the electromagnetic armature of the solenoid valve extends from the hydraulic block 16 on the valve side 20. To operate the solenoid valve, an electromagnetic coil (not shown) is placed on the valve cover. Besides the valve cover, in... Figure 2 The hydraulic block 16 according to the present invention is not equipped with other components. Figure 3 In order to make the receiving part clearly visible, the hydraulic block 16 according to the invention is not equipped and is transparent.

[0031] In the third valve block, the hydraulic block 16 according to the invention has two blind holes in the valve side 20, in addition to the receiving portion 13' for the suction valve 13, serving as receiving portions 14' for the pressure change damper 14. That is, the receiving portion 13' for the suction valve 13 is located between the receiving portions 14' for the pressure change damper 14. The receiving portion 14' for the pressure change damper 14 is offset relative to the receiving portion 9' for the hydraulic pump 9, towards the lateral side of the hydraulic block 16 opposite to the interface side 17. This offset is so small that the imaginary, cylindrical envelope of the receiving portion 14' of the pressure change damper 14 intersects with the receiving portion 9' of the hydraulic pump 9. However, the receiving portion 14' of the pressure change damper 14 is so short that it does not lead into the receiving portion 9' of the hydraulic pump 9. This allows... Figure 4 As can be seen in the figure, this shows a longitudinal section of the hydraulic block 16 parallel to its longitudinal side, that is, perpendicular to the interface side 17, the motor side 30, and the valve side 20, which axially passes through one of the two receiving portions 14' for the pressure change damper 14. (As shown in...) Figure 3 and Figure 4 As can be seen, the housing 14' for the pressure change damper 14 and the housing 9' for the hydraulic pump 9 are recessed into the hydraulic block 16 at right angles to each other and staggered from each other.

[0032] like Figure 4 As shown, the pressure variation damper 14 has a cylindrical, closed-at-one-end housing 24, the open end of which is arranged in an opening of a receiving portion 14' and is pressure-sealed within the receiving portion 14' by a surrounding sealant. The housing 24 of the pressure variation damper 14 extends from the valve side 20 of the hydraulic block 16, like a valve cover of a solenoid valve. A thick-walled, tubular damping body 25 is located within the housing 24, one end of which is closed and its open end opens into the receiving portion 14'. The damping body 25 is made of elastomeric foam and suppresses pressure changes in the brake fluid within it.

[0033] On the motor side 30, that is, on the side of the hydraulic block 16 opposite to the valve side 20 having a receiving portion 14' for the pressure change damper 14, a blind hole is cut in the hydraulic block 16 as a receiving portion 15' for the throttling component 15 (see...). Figure 3 and Figure 4The receiving portion 15' for the throttling component 15 and the receiving portion 14' for the pressure change damper 14 are parallel to each other, having parallel axes. That is, the receiving portion 15' for the throttling component 15 is perpendicular to the receiving portion 9' for the hydraulic pump 9, just as the receiving portion 14' for the pressure change damper 14 is. Like the receiving portion 14' for the pressure change damper 14, the receiving portion 15' for the throttling component 15 is offset relative to the lateral side of the receiving portion 9' for the hydraulic pump 9 facing the hydraulic block 16, opposite the interface side 17, but the offset is greater, so that the receiving portion 15' for the throttling component 15 and the receiving portion 9' for the hydraulic pump 9 do not intersect. However, the offset of the receiving portion 15' for the throttling component 15 is so small that the receiving portion 15' for the throttling component 15 opens into the receiving portion 14' of the pressure change damper 14, just as it can be seen from... Figure 3 and Figure 4 As can be seen from it. In Figure 4 In this configuration, the throttling element 15 is symbolically constructed as a perforated baffle within its receiving portion 15', wherein the throttling element 15 can be further designed. Furthermore, in Figure 4 In the diagram, check valve 23 is indicated by a line symbol within the housing 15' of the throttling component 15. This check valve 23 may be present, but is not mandatory. A borehole 22, drilled from the interface side 17 into the hydraulic block 16, passes parallel to the valve side 20, motor side 30, and longitudinal side of the hydraulic block 16, through the housing 9' of the hydraulic pump 9 and the housing 15' of the throttling component 15. The borehole 22 is formed as part of the orifice of the hydraulic block 16, so that when the hydraulic pump 9 is arranged in its housing 9' within the hydraulic block 16, the borehole connects the pressure side of the hydraulic pump 9 to the housing 15' of the throttling component 15, the housing 7' of the inlet valve 7, and the housing 6' of the disconnect valve 6. The housing 14' for the pressure change damper 14 is connected to the pressure side of the hydraulic pump 9 via the housing 15' for the throttling member 15, wherein the housing for the throttling member leads into the housing for the pressure change damper 14.

Claims

1. A hydraulic block (16) for a hydraulic assembly of a slip adjustment system for a hydraulic vehicle braking device (1), wherein the hydraulic block (16) has a receiving portion (6', 7', 8', 13') for valves (6, 7, 8, 13) of the slip adjustment system and a receiving portion (9') for a hydraulic pump (9), wherein, The hydraulic block (16) has a receiving portion (14') for a pressure change damper (14) on one side (20) and a receiving portion (15') for a throttling component (15) on the other side (30). The feature is that the receiving portion (14') for the pressure change damper (14) and the receiving portion (15') for the throttling component (15) are arranged in the opposite sides (20, 30) of the hydraulic block (16), wherein the receiving portion (14') for the pressure change damper (14) and the receiving portion (15') for the throttling component (15) have parallel axes, and the receiving portion (14') for the pressure change damper (14) and / or the receiving portion (15') for the throttling component (15) are offset relative to the receiving portion (9') for the hydraulic pump (9).

2. The hydraulic block according to claim 1, characterized in that, The housing (14') for the pressure change damper (14) and the housing (15') for the throttling component (15) are offset from each other.

3. The hydraulic block according to claim 1 or 2, characterized in that, The housing (14') for the pressure change damper (14) and the housing (15') for the throttling component (15) intersect or connect to each other.

4. The hydraulic block according to claim 1 or 2, characterized in that, The hydraulic block (16) has an orifice (22) that connects the pressure side of the hydraulic pump (9) arranged in the housing (9') for the hydraulic pump (9) to the housing (14') for the pressure change damper (14), and connects the pressure side of the hydraulic pump (9) arranged in the housing (9') for the hydraulic pump (9) and / or the housing (14') for the pressure change damper (14) to the housing (15') for the throttling member (15).

Images