DE10237163B4 - Hydraulic unit for a vehicle brake system - Google Patents

Abstract

Hydraulic unit for a vehicle brake system (1) with an anti-lock system, which can be connected to a traction control and / or a driving stability control, a housing block for a brake circuit (I, II) having: a master brake cylinder connection (39, 40) and wheel brake connections (55, 56 , 57, 58), - at least one inlet valve receiving space (41, 42, 43, 44) and at least one outlet valve receiving space (45, 46, 47, 48) whose longitudinal axes (49, 59) are aligned axially parallel to the master brake cylinder connection (39, 40) - a pump receiving space (60), the longitudinal axis (61) of which is aligned perpendicular to the longitudinal axes (49, 59) of the inlet and outlet valve receiving spaces (41-48), - at least one low-pressure storage receiving space (51, 52) perpendicular to the Inlet and outlet valve receiving spaces (41-48) and the pump receiving space (60) is aligned, - a suction valve receiving space (65, 66) connected to the pump receiving space (60), wherein ei n first connecting channel (67, 68) between the master brake cylinder connection (39, 40) and the intake valve receiving space (65, 66) which consists of exactly one first straight connecting section (67A, 68A), which from the low-pressure storage receiving space ...

Description

The invention relates to a hydraulic unit for a vehicle brake system with an anti-lock system, which cooperates with a traction control system and / or an electronic driving stability control.

Such a hydraulic unit is known, for example 3 of the DE 199 59 670 A1 , This known hydraulic power unit has a first connecting portion between a low-pressure accumulator receiving space RS1 and an exhaust valve accommodating space SL1, and a second connecting portion between a rear-side opening master cylinder port and the exhaust valve accommodating space SL1. Both connecting sections are each constructed from a plurality of bore sections, the bore sections each extending in different spatial directions. Bore sections are in all 3 Room directions available. The connecting passage from the master brake cylinder port via the exhaust valve receiving space to the low pressure accumulator receiving space comprises a total of 5 pcs. 90 ° deflections and is composed of total 6 Hole sections together. 3 this 6 Bore sections open to various outer sides of the housing block out and must be individually closed to prevent leakage of brake fluid into the environment under operating conditions. In contrast, the invention comes with only 3 Bore sections, 2 Pressure fluid deflections and a single closure to the environment out. Another difference to the invention is the formation of a connection between the intake valve receiving space and a pump receiving space. In the prior art, this consists of two blind-hole boring sections which meet at right angles to one another, while according to the invention this connection is formed only by exactly one bore, which is guided axially parallel to the intake valve receiving space.

A hydraulic power unit for a vehicle brake system is also from the DE 197 12 211 A1 However, without providing the person skilled in the art with regard to the claimed formation of the connections between an intake valve receiving space and a low-pressure accumulator receiving space, between an intake valve receiving space and a master brake cylinder port or between an intake valve receiving space and a pump receiving space.

A hydraulic vehicle brake system with an anti-lock device, by means of an additional traction control and electronic driving stability or vehicle dynamics control with automatic braking without involvement of a driver is possible, is further from the German patent application DE 196 19 985 A1 known.

This known hydraulic vehicle brake system for braking by brake pedal actuation and automatic braking has between a dual-circuit master cylinder and wheel brakes of vehicle wheels Bremsdruckmodulationsventilanordnungen, wherein a wheel brake is associated with a respective brake pressure build-up valve and a brake pressure reduction valve. The brake pressure reduction valve is followed in each case by a storage space and a return pump which can be switched on for the anti-lock operation. For automatic braking, the anti-lock device is additionally equipped with a changeover valve for each brake circuit and with pressure relief valves and controllable intake valves, by means of which the return pumps are connected to the master cylinder.

As problematic proves in such a brake system, the realization of the hydraulic interconnection of the functional elements of the brake system in a housing block of a hydraulic unit. Therein are provided in practice for the brake pressure build-up valves and brake pressure reduction valves arranged in rows receiving spaces, which are connected via pressure medium channels with master cylinder connections and Radbremsenanschlüssen. These connections as well as the connections to a receiving space for the return pumps and the accommodation and connection of the intake valves and changeover valves are known to be made through numerous connection holes, which are usually introduced as a piercing puncture holes from different outer sides in the housing block, said tap holes in the installed state to the outside by closure means be sealed.

A disadvantage is the connection of the individual ports and receiving spaces in the housing block particularly to the effect that the pressure medium channels are largely formed with deflection points, which represent at 90 ° Abzweungen perpendicular to each other.

To the high manufacturing complexity and the aerodynamic disadvantages of such a 90 ° -Abwinkelung is added that each hole section must be closed to the outside, for example by a spherical closure element. This also results in the risk of a possible leak during operation, since these closures are exposed to a pressure pulsation.

It is an object of the present invention to provide a hydraulic unit for a vehicle brake system with a stall protection system which cooperates with a traction control and / or an electronic driving stability control, in which the arrangement of receiving spaces for a pump, valves and other elements and the connection between them Elements in a housing block is optimized so that the hydraulic unit is compact, easy and inexpensive to manufacture.

Advantages of the invention

The hydraulic unit according to the invention for a vehicle brake system with an anti-lock system, which is connectable to a traction control and / or driving stability control, according to the features of claim 1 has the advantage that the housing block can be performed with minimal bore and very small space requirement.

In particular, the connection of the master cylinder connection with the intake valve receiving space through the first connecting channel according to the invention and the connection of the Ansaugventilaufnahmeraums with the Umschaltventilaufnahmeraum via the second connecting channel according to the invention allows a simple production with low cutting costs and a pressure medium guide, each with only one deflection, which is a comparison with the state the technique results in improved pressure build-up behavior with shorter times, especially in the low temperature range.

Through the use of the master cylinder connections and low-pressure accumulator receiving chambers for introducing the first connection channel and its use in connection with the second connection channel for establishing a connection between the Umschaltventilaufnahmeraum and the Ansaugventilaufnahmeraum also results in a reduction of component payment and an increase in the density to the outside, as fewer closures for To the outside of the housing block lines must be provided.

For space optimization also contributes that each master cylinder connection is aligned axially parallel to an axis of a pump motor in the inventive arrangement, whereby brake lines can be arranged to save space next to the engine of the brake system and the entire brake system can be realized with smaller dimensions.

A significant reduction of the machining cost in the production and an optimized hydraulic connection between the intake valve receiving space and the pump receiving space can also be achieved by an embodiment of the hydraulic unit according to claim 10, wherein the connection between the intake valve receiving space and the pump receiving space as one of the intake valve receiving space axially parallel to this in the pump receiving space leading bore can be formed. This means that the Ansaugventilaufnahmeraum, in which in addition to the intake valve itself can also be arranged with this combined high-pressure switching valve, meets in direct extension to the transverse pump bore, whereby the housing block can be formed with a lower overall block depth.

Further advantages and advantageous embodiments of the article according to the invention are the description, the drawings and the claims removed.

drawing

An embodiment of a hydraulic unit according to the invention is shown schematically simplified in the drawing and will be explained in more detail in the following description. Show it

1 a simplified hydraulic circuit diagram of a vehicle brake system arranged in a hydraulic unit according to the invention elements; and

2 a highly schematic three-dimensional representation of a housing block of the hydraulic unit of 1 with receiving spaces for elements to be installed in the hydraulic unit and connections between the receiving spaces.

Description of the embodiment

The 1 shows a simplified hydraulic circuit diagram for a vehicle brake system 1 with a stall protection system, which has a control unit 2 is extended with the functions of a traction control and a driving stability control. For actuating the vehicle brake system 1 by a driver is a via a brake pedal switch 7 with the control unit 2 connected brake pedal 3 and a brake booster 8th provided by the driver on a master cylinder 4 Acting by the present two pistons 10 . 11 Pressure chambers limited, one of which depending on the position of the piston 10 . 11 a brake pressure via a main brake line 5 in a first brake circuit I and via a second main brake line 6 is introduced into a second brake circuit II.

The master cylinder 4 is this with a reservoir 9 connected and can in a known manner, such as in the DE 196 19 985 A1 described, be trained.

The present vehicle brake system 1 is designed as a diagonal brake system, in which the first brake circuit I acts on a wheel brake VL of the vehicle at the front left front wheel and on a wheel HR of a relative to a vehicle central axis diagonally opposite, that is arranged rear right rear wheel. The second brake circuit II acts correspondingly on a wheel brake VR of a front right front wheel and a wheel brake HL of a diagonally thereto rear left of the vehicle arranged rear wheel.

The vehicle brake system 1 For each of the wheel brakes HL, VR, VL, HR has a brake pressure build-up valve or intake valve 12 . 13 . 14 . 15 and a brake pressure lowering valve and exhaust valve, respectively 16 . 17 . 18 . 19 wherein each of an intake valve and an exhaust valve form a brake pressure modulation valve assembly. The intake valves 12 to 15 are each by means of a check valve 26 towards the master cylinder 4 bypassable at a pressure gradient around the respective intake or brake pressure build-up valve 12 to 15 , Furthermore, the intake valves 12 to 15 in the illustrated embodiment, each with a throttle 27 combined.

For each brake circuit I, II is in a so-called secondary circuit the exhaust valves 16 . 17 respectively. 18 . 19 a low pressure accumulator 20 respectively. 21 downstream. The secondary circuit leads via the low-pressure accumulator 20 respectively. 21 to a return pump 22 respectively. 23 by means of a recovery of the hydraulic fluid in the secondary circuit in one of the master cylinder 4 to the respective intake valves 12 to 15 leading primary circuit is possible. The return pumps 22 . 23 be by means of a present with an eccentric common pump motor 24 driven.

All intake and exhaust valves of the brake pressure modulation valve assembly and the pump motor 24 are to the controller 2 connected, wherein an individual control of the respective wheel brake associated valves by the control unit 2 is possible.

The one for the return pumps 22 . 23 common pump motor 24 can be performed in a conventional manner, in which case realized by a suitable software, clocked control of the return pumps 22 . 23 a pressure pulsation damping is provided, which is an embodiment of the vehicle brake system 1 allowed without damper chambers.

In normal braking operation, the intake valves are 12 to 15 open and allow so when pressing the brake pedal 3 a pressure medium flow from the master cylinder 4 in the wheel brakes HL, VR, VL and HR. Here are the exhaust valves 16 to 19 closed or allow in electrically controlled position a throttling passage in the direction of the low-pressure accumulator 20 respectively. 21 and return pumps 22 . 23 ,

When braking with Radperriergefahr the associated inlet valve 12 to 15 closed and depending on the degree of Radperriergefahr the corresponding exhaust valve 16 to 19 at least temporarily open and the pump motor 24 for driving the respective return pump (s) 22 respectively. 23 switched on. This will be the master cylinder 3 Coming pressure against the relevant wheel lock off and to the low-pressure accumulator 20 respectively. 21 and the return pump 22 respectively. 23 derived, whereby a brake pressure reduction and a reduction of Radperriergefahr is achieved.

If the risk of wheel lock is sufficiently reduced, the respective outlet valve 16 to 19 closed, and the associated return pump 22 respectively. 23 empties the associated low pressure accumulator 20 respectively. 21 ,

For an automatic braking is the vehicle brake system shown 1 additionally with a change-over valve 25 for the brake circuit I and another switching valve 26 for the brake circuit II and present in the changeover valves 25 and 26 integrated pressure relief valves 27 . 28 equipped, with the switching valves 25 and 26 are designed as electromagnetically actuated seat valves. The combination of the changeover valves 25 . 26 and the pressure relief valves 27 . 28 is in each case by means of a check valve 29 respectively. 30 umgehbar, so that in an automatic braking operation and at the same time sufficient operation of the brake pedal 3 Pressure medium from the master cylinder 4 to the intake valves 12 to 15 can get.

Furthermore, each of the brake circuits I, II for automatic braking, a controllable directional control valve 31 respectively. 32 on, on the one hand with the respective main brake line 5 respectively. 6 and on the other hand connected to the secondary circuit of the relevant brake circuit I, II. Opening these as 2/2-way valves 31 . 32 running valves causes a connection between the master cylinder 4 and the relevant return pump 22 respectively. 23 , which in each case a self represents filling pump. The directional valves 31 and 32 are so-called intake valves.

To improve the filling of the return pumps 22 . 23 is the vehicle brake system 1 in the present embodiment another, in the DE 196 19 985 A1 described pump device 83 assigned.

The structural design of the intake valves 12 to 15 , Exhaust valves 16 to 19 , Changeover valves 25 . 26 and directional valves or intake valves 31 and 32 and their interaction with each other and each associated with them further elements of the vehicle brake system 1 can in a known per se, such. B. in the DE 196 19 985 A1 described, be executed.

For hydraulic connection between the master cylinder 4 and the wheel brakes HL, VR, VL and HR arranged elements is a hydraulic unit 33 provided, which has a in 2 schematically shown housing block 34 having.

Again 2 can be seen, the housing block 34 for receiving one of the master cylinder 4 in the housing block 34 of the hydraulic unit 33 promoted brake fluid a master cylinder connection 39 for the first brake circuit I and another master cylinder connection 40 for the second brake circuit II. The master cylinder connections 39 . 40 represent holes, which from the side of a connection or flange 38 of the hydraulic unit 33 for the pump motor 24 in the housing block 34 are introduced.

Furthermore, in the housing block 34 with the master brake cylinder connection 39 respectively. 40 the associated brake circuit connected intake valve receiving spaces 41 to 44 for receiving the intake valves 12 to 15 provided, which are arranged in a straight line. In a straight line parallel thereto, two exhaust valve receiving spaces are provided for each brake circuit 45 . 46 respectively. 47 . 48 for receiving the exhaust valves 16 to 19 arranged.

The intake valve and exhaust valve receiving spaces 41 to 48 are with their longitudinal axes 49 respectively. 59 paraxial to the longitudinal axes 50 the master cylinder connections 39 . 40 aligned and from one to the master cylinder connections 39 . 40 having surface 38 opposite side or surface 37 in the housing block 34 stepped incorporated. The intake valve receiving spaces associated with a brake circuit I and II, respectively 41 . 42 respectively. 43 . 44 and exhaust valve receiving spaces 45 . 46 respectively. 47 . 48 are each through a hole 35 respectively. 36 which are perpendicular to the longitudinal axes 49 . 59 the intake valve and exhaust valve receiving spaces 41 to 48 and run parallel to its rows, interconnected. These holes 35 . 36 are in the operating state at their end on an outside of the housing block 24 each closed by a conventional closure means.

To accommodate the exhaust valves 16 to 19 hydraulically downstream low-pressure accumulator 20 and 21 are in the housing block 34 Low-pressure accumulator holding spaces 51 . 52 educated. These are called circular holes on the side of a surface 53 in the housing block 34 introduced, which is perpendicular to the connection or flange 38 for the pump motor 24 stands and one in the 2 a top surface 54 , which leads to the wheel brakes HL, VR, VL and HR arranged in a straight row wheel brake connections 55 to 58 has, opposite. The low pressure storage tanks 51 . 52 and wheel brake connections 55 to 58 are thus perpendicular to the intake valve and exhaust valve receiving spaces 41 to 48 and the master cylinder connections 39 . 40 aligned.

Between the exhaust valve receiving spaces 45 to 48 and the low pressure storage receiving spaces 51 . 52 is a pump receiving space 60 for receiving the return pumps 22 and 23 arranged, whose longitudinal axis 61 perpendicular to the longitudinal axes 49 . 59 the intake valve and exhaust valve receiving spaces 41 to 48 as well as perpendicular to the low-pressure accumulator receiving spaces and wheel brake connections 55 to 58 runs.

The pump receiving space 60 is as a stepped towards the center tapered hole in the housing block 34 introduced and has a center in the pump receiving space 60 opening up, pot-like pump motor receiving room 62 on, perpendicular to the longitudinal axis 61 the pump receiving space 60 and paraxial to the master cylinder connections 39 . 40 from the connection surface 38 for the pump motor 24 in the housing block 24 is introduced. In this recording room 62 is in the assembled state an eccentric of the pump motor 24 known per se and for example in the DE 44 31 250 A1 arranged manner described.

An Indian 2 indicated contour 77 shows essentially the position of the housing block 34 flanged pump motor 24 ,

In the pump receiving room 60 lead from the low-pressure storage receiving spaces 51 . 52 coming, provided for their venting and designed as a separate hole connections 75 respectively. 76 , In this case, a longitudinal axis of these bores 75 . 76 paraxial and in the direction of the pad 38 for the pump motor 24 eccentrically offset to a longitudinal axis of the low pressure storage receiving spaces 51 . 52 ,

Again 2 It can also be seen that the pump receiving space 60 with two each one of the brake circuits I, II associated intake valve receiving spaces 65 and 66 connected.

The intake valve receiving spaces 65 . 66 are each via a first connection channel 67 respectively. 68 with the associated master cylinder connection 39 . 40 connected, said first connection channel 67 . 68 each a first connection section 67A respectively. 68A that of the low-pressure accumulator receiving space 51 respectively. 52 axially parallel to its longitudinal axis in the housing block 34 as a blind hole is drilled, the respective intake valve receiving space 65 . 66 penetrates and is guided into a plane in which a second connecting portion 67B respectively. 68B of the first connection channel 67 . 68 runs, that of the master cylinder connection 39 . 40 axially parallel to its longitudinal axis 50 is drilled as a blind hole and the first connection section 67A . 68A meets.

In the installed state, the first connection section 67A . 68A of the first connection channel 67 . 68 at its low-pressure storage receiving room 51 respectively. 52 facing end in the usual way closed by a closure means.

The intake valve receiving spaces 65 . 66 which are axially parallel to the intake and exhaust valve receiving spaces 41 to 48 are aligned approximately at a height or level with the pump receiving space 60 arranged so that the connection between the respective intake valve receiving space 65 . 66 and the pump receiving space 60 as one of the intake valve receiving space 65 . 66 paraxial to this in the pump receiving space 60 leading bore 81 respectively. 82 is executable.

With the intake valve receiving spaces 65 . 66 each is a switching valve accommodating space 63 respectively. 64 connected, which between the low-pressure accumulator receiving space 51 . 52 and the pump receiving space 60 paraxial to the intake valve and exhaust valve receiving spaces 41 to 48 is arranged aligned. The switching valve receiving spaces 63 . 64 for receiving the changeover valves 25 . 26 are like the intake valve intake spaces 65 . 66 for receiving the intake valves 31 . 32 stepped and parallel to each other from the pad 38 for the pump motor 24 opposite side 37 in the housing block 24 introduced so that the Umschaltventilaufnahmeräume 63 . 64 and intake valve receiving spaces 65 . 66 paraxial to the master cylinder connections 39 . 40 are aligned.

The connection between the changeover valve receiving spaces 63 . 64 and the intake valve receiving spaces 65 . 66 via a second connecting channel, which with one of an outer side 78 respectively. 79 of the housing block 34 introduced, the respective switching valve receiving space 63 . 64 penetrating, perpendicular to the first section 67A . 68A of the first connection channel 67 . 68 running and this meeting hole 69 respectively. 70 is trained.

The hole 69 respectively. 70 of the second connection passage passes through the respective Umschaltventilaufnahmeraum in the embodiment shown 63 . 64 eccentric to a longitudinal axis 80 the switching valve receiving space 63 . 64 towards the pump receiving space 60 added. At its the outside 78 . 79 of the housing block 34 facing end is the second connection channel 69 . 70 locked in the installed state by a closure means.

Furthermore, the switching valve receiving spaces 63 and 64 each over a further, paraxial to the first section 67A . 68A of the first connection channel 67 . 68 extending connection channel 73 respectively. 74 with the associated intake valve receiving spaces 41 to 44 connected.

Claims (18)

Hydraulic unit for a vehicle brake system ( 1 ) with a anti-lock system, which is connectable to a traction control system and / or a driving stability control, wherein a housing block for a brake circuit (I, II) comprises: - a master cylinder connection ( 39 . 40 ) and wheel brake connections ( 55 . 56 . 57 . 58 ), - at least one intake valve receiving space ( 41 . 42 . 43 . 44 ) and at least one exhaust valve receiving space ( 45 . 46 . 47 . 48 ) whose longitudinal axes ( 49 . 59 ) paraxial to the master cylinder connection ( 39 . 40 ), - a pump receiving space ( 60 ) whose longitudinal axis ( 61 ) perpendicular to the longitudinal axes ( 49 . 59 ) of the intake and exhaust valve receiving spaces ( 41 - 48 ), - at least one low-pressure storage receiving space ( 51 . 52 ) perpendicular to the intake and exhaust valve receiving spaces (FIGS. 41 - 48 ) and the pump receiving space ( 60 ), - one with the pump receiving space ( 60 ) connected intake valve receiving space ( 65 . 66 ), wherein a first connection channel ( 67 . 68 ) between the master brake cylinder port ( 39 . 40 ) and the intake valve receiving space ( 65 . 66 ) of exactly a first straight connecting section ( 67A . 68A ) coming from the low-pressure storage compartment ( 51 . 52 ) paraxial to its longitudinal axis, the intake valve receiving space ( 65 . 66 ) penetrates transversely to its longitudinal axis and a straight second connecting portion ( 67B . 68B ) connected to the master cylinder ( 39 . 40 ) paraxial to its longitudinal axis ( 50 ) and across the first connecting section ( 67A . 68A ) is apt, is formed and - a Umschaltventilaufnahmeraum ( 63 . 64 ), which via a second connecting channel ( 69 . 70 ) with the intake valve receiving space ( 65 . 66 ), wherein the intake valve receiving space ( 65 . 66 ) and the switching valve receiving space ( 63 . 64 ) axially parallel to the intake and exhaust valve receiving spaces ( 41 - 48 ) are aligned. Hydraulic unit according to Claim 1, characterized in that the first connecting section ( 67A . 68A ) of the first connection channel ( 67 . 68 ) at its low pressure storage receiving space ( 51 . 52 ) facing end in the installed state is closed by a closure means. Hydraulic unit according to claim 1 or 2, characterized in that the first and / or second connecting portion ( 67A . 68A . 67B . 68B ) of the first connection channel ( 67 . 68 ) is designed as a blind hole. Hydraulic unit according to one of claims 1 to 3, characterized in that the second connecting channel ( 69 . 70 ) with one from an outside ( 78 . 79 ) of the housing block ( 34 ), the switching valve receiving space ( 63 . 64 ) penetrating, perpendicular to the first section ( 67A . 68A ) of the first connection channel ( 67 . 68 ) running and this meeting hole is formed. Hydraulic unit according to Claim 4, characterized in that the second connecting channel ( 69 . 70 ) at its the outside ( 78 . 79 ) of the housing block ( 34 ) facing end in the installed state is closed by a closure means. Hydraulic unit according to one of claims 1 to 5, characterized in that the wheel brake connections ( 55 - 58 ) and the low pressure storage reservoirs ( 51 . 52 ) of opposing surfaces ( 54 . 53 ) in the housing block ( 34 ), these surfaces ( 54 . 53 ) at least approximately perpendicular to a master cylinder connection ( 39 . 40 ) surface ( 38 ) of the housing block ( 34 ) are aligned. Hydraulic unit according to one of claims 1 to 6, characterized in that the pump receiving space ( 60 ) between exhaust valve receiving spaces ( 45 - 48 ) and the low-pressure storage receiving space ( 51 . 52 ) is arranged. Hydraulic unit according to one of claims 1 to 7, characterized in that the switching valve receiving space ( 63 . 64 ) between the low-pressure storage receiving space ( 51 . 52 ) and the pump receiving space ( 60 ), wherein the switching valve receiving space ( 63 . 64 ) penetrating second connecting channel ( 67 . 68 ) eccentric to a longitudinal axis ( 80 ) of the switching valve receiving space ( 63 . 64 ) in the direction of the pump receiving space ( 60 ) is arranged offset. Hydraulic unit according to one of claims 1 to 8, characterized in that the switching valve receiving space ( 63 . 64 ) via a further connection channel ( 73 . 74 ) with the at least one intake valve receiving space ( 41 - 44 ) connected is. Hydraulic unit for a vehicle brake system ( 1 ) with a anti-lock system, which is connectable to a traction control system and / or a driving stability control, wherein a housing block for a brake circuit (I, II) comprises: - a master cylinder connection ( 39 . 40 ) and wheel brake connections ( 55 . 56 . 57 . 58 ), - at least one intake valve receiving space ( 41 . 42 . 43 . 44 ) and at least one exhaust valve receiving space ( 45 . 46 . 47 . 48 ) whose longitudinal axes ( 49 . 59 ) paraxial to the master cylinder connection ( 39 . 40 ), - a pump receiving space ( 60 ) whose longitudinal axis ( 61 ) perpendicular to the longitudinal axes ( 49 . 59 ) of the intake and exhaust valve receiving spaces ( 41 - 48 ), - at least one low-pressure storage receiving space ( 51 . 52 ) perpendicular to the intake and exhaust valve receiving spaces (FIGS. 41 - 48 ) and the pump receiving space ( 60 ), - one with the pump receiving space ( 60 ) connected intake valve receiving space ( 65 . 66 ), which is provided with a switching valve receiving space ( 63 . 64 ), wherein the intake valve receiving space ( 65 . 66 ) and the switching valve receiving space ( 63 . 64 ) axially parallel to the intake and exhaust valve receiving spaces ( 41 - 48 ) and are arranged to each other such that the connection between the intake valve receiving space ( 65 . 66 ) and the pump receiving space ( 60 ) as exactly one of the intake valve receiving space ( 65 . 66 ) parallel to this in the pump receiving space ( 60 ) leading bore ( 81 . 82 ) is trained. Hydraulic unit according to one of claims 1 to 10, characterized in that a plurality of intake valve receiving spaces ( 41 - 44 ) and / or more Exhaust valve receiving spaces ( 45 - 48 ) are each arranged in a straight line. Hydraulic unit according to one of claims 1 to 11, characterized in that the wheel brake connections ( 55 - 58 ) are arranged in a straight row. Hydraulic unit according to one of claims 1 to 12, characterized in that a receiving space ( 62 ) for a pump motor ( 24 ) in the middle of the pump receiving space ( 60 ) and axially parallel to the master cylinder connection ( 39 . 40 ) is trained. Hydraulic unit according to one of claims 1 to 13, characterized in that a separate connection ( 75 . 76 ) between the low-pressure storage receiving space ( 51 . 52 ) and the pump receiving space ( 60 ) is provided whose longitudinal axis to the longitudinal axis of the low-pressure accumulator receiving space ( 51 . 52 ) in the direction of a connection surface ( 38 ) of the hydraulic unit ( 33 ) for a pump motor ( 24 ) is arranged offset. Hydraulic unit according to one of claims 1 to 14, characterized in that it is formed without damping chamber. Hydraulic unit according to one of claims 1 to 15, characterized by its use with a pressure pulsation damping control of the pump motor ( 24 ). Hydraulic unit according to claim 14, characterized in that the longitudinal axis of the separate connection ( 75 . 76 ) axially parallel to the longitudinal axis of the low-pressure storage receiving space ( 51 . 52 ) is arranged offset. Hydraulic unit according to claim 16, characterized in that the pressure pulsation damping control of the pump motor ( 24 ) is a clocked controller.

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