DE102014215091A1 - Simulator device for a brake system of a vehicle and method of manufacturing a simulator device for a brake system of a vehicle - Google Patents

Abstract

The invention relates to a simulator device (50) for a braking system of a vehicle having a piston component (56) which subdivides an internal volume (54) into a first partial volume (58) and a second partial volume (60), the at least one first bore (56). 62) fillable first part volume (58) is steigerbar, while at least one second bore (64) brake fluid from the reduced second sub-volume (60) is transferable, wherein, if an adjustment of the piston component (56) is greater than a Grenzverstellweg, at least one Sealing region (72) of the piston component (56) between at least one on the inner volume (54) adjacent the mouth region (70) of the at least one second bore (64) and the second sub-volume (60) is pushed, and wherein in the piston component (56) at least a brake fluid path (74) is formed such that, if the displacement of the piston component (56) is greater than the Grenzverstellweg, Bre ms liquid from the second sub-volume (60) via the at least one brake fluid path (74) in the at least one second bore (64) is transferable.

Description

The invention relates to a simulator device for a brake system of a vehicle. Likewise, the invention relates to a hydraulic unit for a brake system of a vehicle and a brake system for a vehicle. Furthermore, the invention relates to a production method for a simulator device for a brake system of a vehicle and to a method for producing a hydraulic unit for a brake system of a vehicle.

State of the art

1a and 1b show a cross section through a conventional pedal stroke simulator and a coordinate system for explaining its operation.

The in 1a schematically reproduced conventional Pedalhubsimulator is installed in the Toyota Prius III. The conventional pedal stroke simulator has a casting as a housing 10 and one on the casting 10 inserted cap 12 on. An internal volume in the housing is by means of an adjustable piston 18 in a first partial volume 14 and a second subvolume 16 divided. The adjustable piston 18 carries an elastomeric seal 20 and is by means of two in the second sub-volume 16 arranged simulator springs 22 and 24 supported. A first simulator pen 22 of the two simulator springs 22 and 24 has a much lower spring stiffness than a second simulator spring 24 of the two simulator springs 22 and 24 , The the closure lid 12 contacting second simulator spring 24 pushes a spring plate 26 from the closure lid 12 path. By means of an inner bottom surface of the spring plate 26 contacting first simulator spring 22 becomes the piston 18 from the inner bottom surface of the spring plate 26 pressed away.

About one in the casting 10 trained connection bore 28 is brake fluid, which is pressed out by means of a driver braking force from a connected to the conventional Pedalhubsimulator master cylinder, in the first sub-volume 14 displaceable. It's also on the casting 10 a volume compensation opening 30 formed, via which brake fluid from the second subvolume 16 can be transferred into a connected expansion tank.

By means of the coordinate system of 1b is an operation of the conventional Pedalhubsimulators reproduced. An abscissa of the coordinate system of 1b indicates a displacement s (in millimeters) of a brake operating member (brake pedal) connected to the conventional pedal lift simulator (via the master cylinder). By means of the ordinates of the coordinate system of 1b a driver braking force F (in Newton) and a pressure p (in bar) applied thereto are reproduced in the conventional pedal stroke simulator.

Braking a driver by means of an actuation of the brake actuating element (brake pedal) in the conventional pedal stroke simulator causes from a response force F0 and a response s0 first an adjusting movement of the piston 18 from the first partial volume 14 in the second subvolume 16 under a deformation of the first simulator spring 22 until it hits the piston 18 on the inner bottom surface of the spring plate 26 at a displacement s equal to a predetermined free travel .DELTA.s. Unless the driver after hitting the piston 18 on the inner bottom surface of the spring plate 26 continues to brake into the conventional pedal stroke simulator, become pistons 18 and spring plate 26 under a deformation of the second simulator spring 24 towards the shutter piston 12 pressed. The driver can by means of the driver brake force F the piston 18 so far in the second subvolume 16 push in that one on the closure lid 12 attached elastomeric component 32 is deformed. In this way, for the conventional Pedalhubsimulator a force-displacement curve F (s) and a pressure-displacement curve p (s) with a large increase in force or pressure in an end region of the displacement s be realized. By means of the piston 18 circumferential elastomer seal 20 In addition, a hysteresis ΔF or Δp for the force-displacement curve F (s) and the pressure-displacement curve p (s) should be ensured. The elastomer seal 20 causes static friction of the piston 18 on the housing, which the driver by means of a breakaway force Fa before an adjustment movement of the piston 18 must overcome.

Disclosure of the invention

The invention provides a simulator device for a brake system of a vehicle having the features of claim 1, a hydraulic unit for a brake system of a vehicle having the features of claim 8, a brake system for a vehicle having the features of claim 9, a manufacturing method for a simulator device for a Braking system of a vehicle with the features of claim 10 and a manufacturing method for a hydraulic unit for a brake system of a vehicle having the features of claim 11.

Advantages of the invention

The present invention provides simulator devices for on-board brake systems whose respective force-displacement curve (or pressure-displacement curve) only from an adjustment of the Piston component from its initial position over the predetermined Grenzverstellweg has a perceptible hysteresis. In a displacement of the piston component from its initial position below the predetermined Grenzverstellweg the force-displacement curve (or pressure-displacement curve) of each simulator device according to the invention, however, (almost) hysteresis-free. While the elastomer components used in the prior art cause a hysteresis of the force-displacement characteristic of the conventional Pedalhubsimulatoren over the entire displacement of their pistons, in the simulator device according to the invention, the occurrence of hysteresis on a portion of the total Adjustment of the piston component limited, for which the hysteresis is advantageous.

The occurrence of a noticeable hysteresis on the force-displacement curve (or pressure-displacement curve) of each simulator device according to the invention with a displacement of the respective piston component from its initial position over the predetermined Grenzverstellweg prevents a discharge of a connected brake actuator (brake pedal) immediately Change a previously requested vehicle deceleration triggers. Accordingly, even after the discharge of the brake operating member (pedal relief) due to the hysteresis in a re-operation / reentry prevents too direct effect of the delay. The present invention thus eliminates a so-called "nervous" brake operation feeling (pedal feeling).

At the same time it is ensured in each simulator device according to the invention that, in particular at the beginning of the entire adjustment of the piston component, especially in the jump-in workspace, no high breakout force for adjusting / Weiterverstellen the piston component is necessary. The response of each simulator device according to the invention is therefore so fine that during use of the simulator device according to the invention a pleasant (standard) brake actuation feeling (pedal feel) is ensured for the driver of a vehicle equipped with the simulator device according to the invention.

With a displacement of the piston component of each simulator device according to the invention from its initial position under the predetermined Grenzverstellweg brake fluid is displaced directly between the second sub-volume and the at least one opening out there mouth region of at least one second bore. Therefore, as long as the displacement of the piston component remains from its initial position below the predetermined Grenzverstellweg, an inching of the piston component in the second sub-volume or a Hinausverstellen the piston component from the second sub-volume counteracting friction low. In an adjustment of the piston component from its initial position under the predetermined Grenzverstellweg is therefore also applied to overcome a "sticking" of the piston component in an intermediate position breakout force relatively low. Only when the displacement of the piston component from its initial position is greater than the predetermined Grenzverstellweg, causes a corresponding design of the at least one brake fluid path in the piston component a resistance to the "release" of the piston component.

Once the piston component is adjusted from its initial position by an adjustment greater than the predetermined Grenzverstellweg, an immediate brake fluid transfer between the second subvolume and the at least one adjoining the inner volume of the at least one second bore hole is prevented. Instead, a brake fluid exchange between the second subvolume and the at least one opening region of the at least one second bore is possible only via the at least one brake fluid path in the piston component. In order to effect a "release" of the piston component at an adjustment from its initial position on the predetermined Grenzverstellweg, therefore, the brake fluid to be displaced must be additionally pressed by the at least one brake fluid path in the piston component. A "counteracting" counteracting force is thus increased from an adjustment of the piston component from its initial position over the predetermined Grenzverstellweg. Thus, an increased breakaway force must be applied to overcome a "sticking" of the piston component in an intermediate position with a displacement of the piston component from its initial position over the predetermined Grenzverstellweg.

Preferably, a first minimum flow area of the at least one second bore is greater than a two-dimensional flow area of the at least one brake fluid path. As an alternative or in addition to this, a first average / average flow area of the at least one second bore may also be larger than a second average / average flow area of the at least one brake fluid path. In both cases, an advantageously large hysteresis of the force-displacement curve (or pressure-displacement curve) of the respective simulator device is ensured, the noticeable hysteresis, however, only from an adjustment of the piston component from her Starting position above the predetermined Grenzverstellweg occurs.

In a further advantageous embodiment, the piston component comprises a piston body with a bottom portion and a cylindrical portion and a disc with a diaphragm, wherein in the bottom portion of the piston body a recess is formed and formed on an outer surface of the cylindrical portion of the piston body, a puncture, wherein a formed in the piston body bore extends from the recess to the recess, and wherein the recess in the bottom region by means of the disc is partially covered so that brake fluid from the second partial volume via the at least one of the aperture, the recess, the bore and the recess comprehensive brake fluid path in the at least one second bore is transferable. The formation of the at least one brake fluid path in the piston component is thus easy and inexpensive to implement. It should be noted, however, that the formability of the simulator device is not limited to such a piston component. For example, as a piston component, a one-piece piston component can be used in the simulator device.

In an advantageous development, a neighboring region of the pane surrounding the panel may be shaped like a tulip cup. As a result, a different hysteresis for the respective flow directions of the brake fluid through the diaphragm can be achieved.

Advantageously, the simulator device comprises a first simulator spring having a first spring stiffness and a second simulator spring having a second spring stiffness greater than the first spring stiffness than the at least one simulator spring. As will be explained in more detail below, by means of the equipment of the simulator device with at least two such simulator springs, a jump-in work area can be formed on the simulator device.

For example, the first simulator spring may be supported on a first side on a housing part of the simulator device and on a second side directed away from the housing part on an inner bottom surface of a spring plate, and the second simulator spring may be on a first side on a surface facing away from the housing part a flange of the spring plate and supported on a directed away from the housing part second side of the piston component. The arrangement of the two simulator springs in the simulator device is thus easily carried out. However, the embodiment described here for the equipment of the simulator device with the two simulator springs is to be interpreted only as an example.

The advantages described above are also realized in a hydraulic power unit for a brake system of a vehicle with a corresponding simulator device integrated therein.

A braking system for a vehicle with such a simulator device or a corresponding hydraulic unit also provides the advantages described above.

In addition, the above-described advantages can be realized by performing a corresponding manufacturing method for a simulator device for a brake system of a vehicle. The manufacturing method can be further developed in accordance with the above-described embodiments of the simulator device.

Further, executing the corresponding manufacturing method for a hydraulic power unit for a brake system of a vehicle also provides the advantages described above. This production method can also be further developed in accordance with the embodiments of the simulator device explained above.

Brief description of the drawings

Further features and advantages of the present invention will be explained below with reference to the figures. Show it:

1a and 1b a cross section through a conventional pedal stroke simulator and a coordinate system for explaining its operation;

2a to 2c schematic representations of a first embodiment of the simulator device;

3 a schematic partial view of a second embodiment of the simulator device;

4 a schematic representation of an embodiment of the braking system; and

5 a flowchart for explaining an embodiment of the manufacturing method for a simulator device for a brake system of a vehicle.

Embodiments of the invention

2a to 2c show schematic representations of a first embodiment of the simulator device.

In the 2a to 2c illustrated simulator device 50 is used in a brake system of a vehicle / motor vehicle. The applicability of the simulator device 50 is not limited to a certain type of brake system or to a specific type of vehicle / type of vehicle. The simulator device 50 can be built as a single component with its own housing in the thus equipped to be equipped braking system. Likewise, the simulator device 50 in a hydraulic power unit 52 be integrated with the respective brake system.

The simulator device 50 has one within an internal volume 54 the simulator device 50 adjustably arranged piston component 56 on. The internal volume 54 the simulator device 50 For example, one of the simulator device's own housing 50 surrounding interior or a bore 54 in the hydraulic unit 52 be. The piston component 56 divides the interior volume 54 in a first partial volume 58 and into a second subvolume 60 (in addition to that of the piston component 56 occupied residual volume). In the presence of the piston component 56 in its initial position that is about at least a first hole 62 first partial volume which can be filled with brake fluid 58 minimal. Accordingly, this is about at least a second hole 64 second partial volume which can be filled with brake fluid 60 in the presence of the piston component 56 in their initial position maximum. The piston component 56 is from its initial position against at least one spring force of at least one simulator spring 66 and 68 the simulator device 50 so adjustable that that over the at least one first bore 62 first partial volume which can be filled with brake fluid 58 is steigerbar, while on the at least one second hole 64 Brake fluid from the reduced second partial volume 60 is transferable.

The at least one first hole 62 is identifiable as an inflow bore, while the at least one second bore 64 as an outflow hole is rewritable. It is noted, however, that about the at least one first hole 62 also brake fluid from the first part volume 58 is squeezable while on the at least one second bore 64 Brake fluid in the second subvolume 60 is sucked. The at least one second hole 64 is so on the simulator device 50 formed such that, provided an adjustment of the piston component 56 from its initial position is smaller than a predetermined Grenzverstellweg, at least one of the inner volume 54 adjacent mouth area 70 the at least one second bore 64 at least partially in the second subvolume 60 empties. One can also rewrite that with a displacement of the piston component 56 from its initial position under the predetermined Grenzverstellweg the at least one of the inner volume 54 adjoining estuarine area 70 the at least one second bore 64 at the second subvolume 60 free / uncovered. Is the adjustment of the piston component 56 from its initial position, however, greater than the predetermined Grenzverstellweg, so is at least one Abdichtbereich 72 the piston component 56 between the at least one mouth area 70 and the second subvolume 60 pushed. An immediate brake fluid transfer between the at least one mouth region 70 and the second subvolume 60 is thus by means of the at least one shifted sealing area 72 the displaced from its initial position by at least the predetermined Grenzverstellweg piston component 56 prevented.

Also, in the piston component 56 at least one at the at least one sealing area 72 opening brake fluid path 74 designed such that, provided that the adjustment of the piston component 56 from its initial position is greater than the predetermined Bremsverstellweg, brake fluid from the second sub-volume 60 over the at least one brake fluid path 74 into the at least one second hole 64 is transferable. One can also rewrite this as starting from an adjustment of the piston component 56 from its initial position by an adjustment of at least the predetermined Grenzverstellweg the at least one brake fluid path 74 the second partial volume 60 with the at least one mouth area 70 the at least one second bore 64 hydraulically connects by at least a first end of the at least one brake fluid path 74 in the second subvolume 60 and a respective second end of the respective brake fluid path 74 at the at least one mouth area 70 lead. (At an adjustment of the piston component 56 from its initial position below the predetermined Grenzverstellweg is the at least one second end of the respective brake fluid path 74 usually separated from the at least one mouth area 70 in front.)

While at a displacement of the piston component 56 from its initial position under the predetermined Grenzverstellweg brake fluid directly between the second sub-volume 60 and the at least one mouth opening out there 70 the at least one second bore 64 is displaceable, is at a displacement of the piston component 56 from its initial position over the predetermined Grenzverstellweg a brake fluid exchange between the second sub-volume 60 and the at least one mouth area 70 the at least one second bore 64 only via the at least one brake fluid path 74 in the piston component 56 possible. The simulator device 50 thus has at least one from an adjustment of their piston component 56 from the initial position by at least the predetermined Grenzverstellweg activated flow diversion by the piston component 56 , At an adjustment of the piston component 56 from its initial position above the predetermined Grenzverstellweg is therefore one of the wetted with the transferred brake fluid inner walls of the at least one brake fluid path 74 frictional resistance caused for the brake fluid exchange between the second partial volume 60 and the at least one mouth area 70 in addition to overcome. One can also rewrite this with the fact that the simulator device 50 the brake fluid exchange between the second sub-volume 60 and the at least one mouth area 70 opposes a displacement-specific resistance, which at a displacement of the piston component 56 from its initial position under the predetermined Grenzverstellweg is still relatively low, but at a displacement of the piston component 56 is significantly larger from its initial position over the predetermined Grenzverstellweg.

The simulator device 50 Therefore, has a force-displacement characteristic (or pressure-displacement characteristic), which only from an adjustment of the piston component 56 from its initial position over the predetermined Grenzverstellweg has a perceptible hysteresis. In contrast to one at a displacement of the piston component 56 From its initial position over the predetermined Grenzverstellweg comparatively large breakout force to overcome a "sticking" of the piston component 56 (in an intermediate position) is therefore before adjusting the piston component 56 from its initial position by at least the predetermined Grenzverstellweg only a relatively small breakout force for Hineinverstellen the piston component 56 in the second subvolume 60 or to readjust the piston component 56 from the second partial volume 60 applied. A user of the simulator device 50 is therefore not irritated by a large breakaway force at a braking with a comparatively low Einbremsweg. (When braking in the simulator device 50 with a large Einbremsweg the user feels a large breakout force hardly disturbing.) At the same time is a "nervous" brake actuation feeling (pedal feel) when braking in the simulator device 50 prevented with a large Einbremsweg. Thus, a discharge on the simulator device causes 50 connected brake actuator (brake pedals) after braking with a large Einbremsweg not immediately a change in a current vehicle deceleration. Also, due to the hysteresis of the force-displacement characteristic in a re-operation / re-entry after the discharge of the brake operating member prevents too direct acting of the delay. The user of the simulator device 50 thus has a pleasant feeling of brake operation (pedal feel).

Preferably, a first minimum flow area of the at least one second bore 64 greater than a second minimum flow area of the at least one brake fluid path 74 , As an alternative or in addition thereto, a first average / average flow area of the at least one second bore can also be provided 64 greater than a second average / average flow area of the at least one brake fluid path 74 be. In both cases, the in-line adjustment of the piston component 56 in the second subvolume 60 or the displacement of the piston component 56 from the second partial volume 60 a comparatively large resistance adjustment path specific oppositely.

In the embodiment of the 2a to 2c includes the piston component 56 a piston body 76 with a floor area 76a and a cylindrical area 76b and a slice 78 with a panel 80 , The disc 78 can also act as a hysteresis disc 78 be designated. In the floor area 76a of the piston body 76 is (at one of the first subvolume 58 directed away and to the second sub-volume 60 aligned side) a recess 82 educated. On an outer surface of the cylindrical portion 76b of the piston body 76 is a puncture 84 educated. You can do the puncture 84 on the outer surface of the cylindrical portion 76b also as a taper of an outer diameter in a central portion of the cylindrical portion 76b rewrite. Preferably, a lower piston edge 72 at one of the first subvolume 58 directed away end of the puncture 84 as a sealing area 72 the piston component 56 be educated. About one in the piston body 76 trained hole 86 (eg a radial bore 86 ), which differ from the depression 82 to the puncture 84 extends are the recess 82 and the puncture 84 hydraulically connected to each other.

The depression 82 in the floor area 76a is by means of the disc 78 partially covered so that the aperture 80 at the recess 82 empties. Thus, (from an adjustment of the piston component 56 from their starting position by at least the predetermined Grenzverstellweg) brake fluid from the second subvolume 60 over the at least one the aperture 80 , the recess 82 , the hole 86 and the puncture 84 comprehensive brake fluid path 74 into the at least one second hole 64 transferable. Accordingly, (from an adjustment of the piston component 56 from its initial position by at least the predetermined Grenzverstellweg) brake fluid from the at least one second bore 64 over the puncture 84 , the hole 86 , the recess 82 and the aperture 80 in the second subvolume 60 be transferable. In particular by means of a diameter of the diaphragm 80 may be the hysteresis of the Kraft-Verstellweg-characteristic curve (or the pressure-displacement characteristic curve) of the simulator device 50 be set easily and reliably. In addition, the aperture 80 in a first approximation viscosity-independent, so that fluctuations in the hysteresis over the operating temperature are low.

Optionally, at one to the first sub-volume 58 aligned outer surface of the floor area 76a of the piston body 76 another seal 88 be attached. By means of the seal 88 may in this case leakage of brake fluid along an outer side of the piston component 56 between the first subvolume 58 and the second subvolume 60 be prevented.

It should be noted that a 100% tightness between the piston body 76 and the disc 78 is not required. The insertion of an additional sealing element between the piston body 76 and the disc 78 can thus be omitted.

In the embodiment of the 2a to 2c has the simulator device 50 a first simulator spring 66 with a first spring stiffness and a second simulator spring 68 having a second spring stiffness greater than the first spring stiffness than the at least one simulator spring 66 and 68 on. The first simulator pen 66 is supported by way of example on a first side on a housing part 90 the simulator device 50 from. The housing part 90 For example, a cap 90 which is the inner volume 54 in the hydraulic unit 52 trained hole 54 seals to the outside. On one of the housing part 90 directed away second side is based on the first simulator spring 66 on an inner bottom surface of a spring plate 92 from. The second simulator spring 68 rests on a first side on one of the housing part 90 directed away surface of a flange of the spring plate 92 from. On one of the housing part 90 directed away second side is based on the second simulator spring 68 at the piston component 56 from. Specifically, the second simulator spring protrudes 68 partly in one of the cylindrical area 76b of the piston body 76 stretched inside volume and is supported on the disc 78 from. In the 2a to 2c schematically illustrated arrangement of the two simulator springs 66 and 68 is to be interpreted only as an example. It should also be noted that the designability of the simulator device is not limited to a particular number of simulator springs 66 and 68 is limited.

2a shows the simulator device 50 in the presence of the piston component 56 in their initial position. About the at least one first hole 62 can brake fluid from a connected master cylinder in the first part volume 58 into which the piston component 56 from its initial position into the second subvolume 60 moved in and brake fluid from the second part volume 60 over the at least one second bore 64 in a tailed surge tank (with atmospheric pressure present therein) is displaceable. A driver of one with the simulator device 50 equipped vehicle thus has the possibility by pressing its brake actuator (brake pedal) via the master cylinder in the simulator device 50 einzubremsen.

When adjusting the piston component 56 From their initial position, at first only the weaker first simulator spring 66 deformed while the second simulator spring 68 preferably still retains its original shape. The exclusive deformation of the first simulator spring 66 while maintaining the output form of the second simulator spring 68 can be done until the spring plate 92 on the housing component 90 abuts (see 2 B ). For an adjustment of the piston component 56 from its initial position to the abutment of the spring plate 92 on the housing component 90 Therefore, the force-displacement characteristic only comparatively low force values. The adjustment of the piston component 56 from its initial position, in which the spring plate 92 on the housing component 90 can therefore also be called a jump-in way. Preferably, the jump-in path is smaller than the predetermined Grenzverstellweg. A jump-in workspace of the simulator device 50 is thus (almost) hysteresis-free.

As in 2 B in particular, the jump-in path can be equal to the predetermined limit adjustment path. Thus, from overcoming the jump-in working range, the noticeable hysteresis occurs on the force-displacement characteristic (or the pressure-displacement characteristic) of the simulator device 50 on.

After the abutment of the spring plate 92 on the housing component 90 a further adjustment of the piston component takes place 56 in the second subvolume 60 under a deformation of the second simulator spring 68 , Because the second simulator spring 68 a greater spring stiffness than the first simulator spring 66 The driver must deform the second simulator spring 68 exercise significantly more driver braking force on the tethered to the master cylinder brake actuator. In addition, due to the in 2c by means of the arrows 94 reproduced Brake fluid exchange over the at least one brake fluid path 74 ensures the noticeable hysteresis, which prevents a behavior of a "nervous" brake actuator (brake pedal).

3 shows a schematic partial view of a second embodiment of the simulator device.

In 3 is from the simulator device 50 only a cross section through the disc 78 (hysteresis 78 ). It can be seen that the aperture 80 the disk is surrounded by a neighboring area 96 the disc 78 , which is tulip-cup shaped. You can also rewrite this as the neighbor area 96 the aperture 80 to one side of the disk 78 is bulged while the rest of the disc 78 is flat. By means of the tulip-shaped aperture geometry of the disc 78 a different hysteresis for the respective flow direction can be achieved. Depending on the orientation of the tulip-shaped region, the flow or flow for a flow direction can be facilitated. One to the first partial volume 58 aligned bulge of the neighboring area 60 Reduces the hysteresis at pedal load compared to the hysteresis at pedal relief. By means of a to the second partial volume 60 aligned bulge of the neighboring area 60 The hysteresis decreases with pedal relief compared to the hysteresis under pedal load.

The disc 78 but it can also be completely flat. As a disk 78 For example, a simple stamped part can be used.

4 shows a schematic representation of an embodiment of the brake system.

This in 4 Schematically illustrated braking system exemplifies two simulator devices 50 on. The two simulator devices 50 can, optionally, via a simulator valve 100 and / or via a check valve 104 , at least one pressure chamber of a master cylinder 102 be connected. Furthermore, the simulator devices 50 via at least one suction line 106 to a surge tank / a brake fluid reservoir 108 connected to the brake system. Through a parallel connection of several simulator devices 50 to the master cylinder 102 can during a braking of a driver in the simulator devices 50 a length of each on each simulator device 50 occurring hubs are shortened. The number of simulator devices arranged parallel to one another 50 but can be chosen freely. The equipment of brake system of 4 with exactly two simulator devices 50 is merely an example. Even with an equipment of the brake system with only one simulator device 50 is a user-acceptable brake actuation feeling (pedal feel) can be generated with a specially tuned characteristic curve.

The braking system of 4 exemplifies two brake circuits 110a and 110b on. Every brake circuit 110a and 110b has two wheel brake cylinders 112 , one wheel inlet valve each 114 per wheel brake cylinder 112 and one wheel outlet valve each 116 per wheel brake cylinder 112 , Each with a first isolation valve 118 is every brake circuit 110a and 110b on the master cylinder 102 tethered. Besides, every brake circuit is 110a and 110b via a second isolation valve 120 to a motorized piston-cylinder device 122 (eg a plunger) connected. After closing the respective first isolation valve 118 is thus the at least one in the wheel brake cylinders 112 of the respective brake circuit 110a or 110b present brake pressure and independent of an operation of the master cylinder 102 tethered brake actuator / brake pedals 124 by means of the motorized piston-cylinder device 122 adjustable. Furthermore, the brake system can still at least one form sensor 126 and / or at least one pressure sensor 128 to have. Optionally, the brake system can still with at least one brake actuation sensor 130 , eg a pedal travel sensor and / or a rod travel sensor 130 be equipped.

5 FIG. 12 is a flow chart for explaining an embodiment of the manufacturing method for a vehicle brake system simulator apparatus. FIG.

By means of the manufacturing method described below, for example, the above-described embodiments of the simulator device can be produced. It should be noted, however, that the practicability of the manufacturing method is not limited to making one of these embodiments.

In a method step S1, a housing of the later simulator device is formed with an internal volume, at least one first bore and at least one second bore. For example, the simulator device can be integrated in a hydraulic unit.

Before the method step S1, simultaneously with the method step S1 or after the method step S1, a method step S2 is carried out. In method step S2, an adjustable piston component is supported within the internal volume by means of at least one simulator spring such that the internal volume is subdivided into a first partial volume and a second partial volume. This ensures that the at least a first hole filled with brake fluid first partial volume is minimal in a presence of the piston component in its initial position and is increased by adjusting the piston component from its initial position against at least one spring force of at least one simulator spring while through Adjusting the piston component, the second partial volume is reduced.

In addition, in method step S1, the at least one second bore is formed on the housing such that, as long as the piston component is displaced from its initial position by an adjustment smaller than a predetermined Grenzverstellweg, at least one of the inner volume adjacent mouth region of the at least one second bore at least partially opens in the second subvolume. However, as soon as the displacement of the piston component from its initial position is greater than the predetermined Grenzverstellweg, by means of the formation of at least one second bore ensures that at least one sealing region of the piston component between the at least one mouth region and the second sub-volume is pushed.

Furthermore, a method step S3 is performed before at least method step S2. In the method step S3, at least one brake fluid path is formed in the piston component such that, as soon as the displacement of the piston component from its initial position is greater than the predetermined Grenzverstellweg, the second subvolume on the at least one opening at the at least one Abdichtbereich Bremsflüssigkeitspfad with the at least one second Bore is connected.

Claims (11)

Simulator device ( 50 ) for a braking system of a vehicle with an inside volume ( 54 ) of the simulator device ( 50 ) adjustably arranged piston component ( 56 ), which the internal volume ( 54 ) into a first partial volume ( 58 ) and a second partial volume ( 60 ), wherein the at least one first bore ( 62 ) can be filled with brake fluid first partial volume ( 58 ) in the presence of the piston component ( 56 ) is minimal in its initial position, and the piston component ( 56 ) from its initial position against at least one spring force of at least one simulator spring ( 66 . 68 ) of the simulator device ( 50 ) is adjustable so that via the at least one first bore ( 62 ) can be filled with brake fluid first partial volume ( 58 ) is increased while at least a second bore ( 64 ) Brake fluid from the reduced second partial volume ( 60 ) is transferable; characterized in that, provided an adjustment of the piston component ( 56 ) is smaller than a predetermined Grenzverstellweg from its initial position, at least one of the inner volume ( 54 ) adjacent mouth area ( 70 ) of the at least one second bore ( 64 ) at least partially in the second sub-volume ( 60 ), while, if the displacement of the piston component ( 56 ) is greater than the predetermined Grenzverstellweg from its initial position, at least one Abdichtbereich ( 72 ) of the piston component ( 56 ) between the at least one mouth region ( 70 ) and the second partial volume ( 60 ) is pushed; wherein in the piston component ( 56 ) at least one at the at least one sealing area ( 72 ) opening brake fluid path ( 74 ) is designed such that, provided that the adjustment of the piston component ( 56 ) is greater than the predetermined Grenzverstellweg from its initial position, brake fluid from the second sub-volume ( 60 ) via the at least one brake fluid path ( 74 ) into the at least one second bore ( 64 ) is transferable. Simulator device ( 50 ) according to claim 1, wherein a first minimum flow area of the at least one second bore ( 64 ) greater than a second minimum flow area of the at least one brake fluid path ( 74 ). Simulator device ( 50 ) according to claim 1 or 2, wherein a first mean flow area of the at least one second bore ( 64 ) greater than a second mean flow area of the at least one brake fluid path ( 74 ). Simulator device ( 50 ) according to any one of the preceding claims, wherein the piston component ( 56 ) a piston body ( 76 ) with a floor area ( 76a ) and a cylindrical area ( 76b ) and a disc ( 78 ) with an aperture ( 80 ), wherein in the bottom area ( 76a ) of the piston body ( 76 ) a recess ( 82 ) is formed and on an outer surface of the cylindrical portion ( 76b ) of the piston body ( 76 ) a puncture ( 84 ), wherein one in the piston body ( 76 ) formed bore ( 86 ) from the depression ( 82 ) to the puncture ( 84 ), and wherein the recess ( 82 ) in the floor area ( 76a ) by means of the disc ( 78 ) is partially covered so that brake fluid from the second partial volume ( 60 ) over the at least one the aperture ( 80 ), the deepening ( 82 ), the bore ( 86 ) and the puncture ( 84 ) comprehensive brake fluid path ( 74 ) into the at least one second bore ( 64 ) is transferable. Simulator device ( 50 ) according to claim 4, wherein the diaphragm ( 80 ) surrounding neighboring area ( 96 ) of the disc ( 78 ) tulip cup-shaped. Simulator device ( 50 ) according to one of the preceding claims, wherein the simulator device ( 50 ) a first simulator spring ( 66 ) with a first spring stiffness and a second simulator spring ( 68 ) having a second spring stiffness greater than the first spring stiffness than the at least one simulator spring ( 66 . 68 ). Simulator device ( 50 ) according to claim 6, wherein the first simulator spring ( 66 ) on a first side on a housing part ( 90 ) of the simulator device ( 50 ) and on one of the housing part ( 90 ) directed away second side of an inner bottom surface of a spring plate ( 92 ) and the second simulator spring ( 68 ) on a first side at one of the housing part ( 90 ) directed away surface of a flange of the spring plate ( 92 ) and on one of the housing part ( 90 ) directed away second side on the piston component ( 56 ) is supported. Hydraulic unit ( 52 ) for a braking system of a vehicle with a simulator device integrated therein ( 50 ) according to any one of the preceding claims. Braking system for a vehicle with a simulator device ( 50 ) according to one of claims 1 to 7 or a hydraulic power unit ( 52 ) according to claim 8. Manufacturing method for a simulator device ( 50 ) for a braking system of a vehicle, comprising the step of: forming a housing of the later simulator device ( 50 ) with an internal volume ( 54 ), at least one first bore ( 62 ) and at least one second bore ( 64 ); and supporting an adjustable piston component ( 56 ) within the internal volume ( 54 ) by means of at least one simulator spring ( 66 . 68 ), that the internal volume ( 54 ) into a first partial volume ( 58 ) and a second partial volume ( 60 ), wherein the at least one first bore ( 62 ) can be filled with brake fluid first partial volume ( 58 ) in the presence of the piston component ( 56 ) is minimal in its initial position and by adjusting the piston component ( 56 ) from its initial position against at least one spring force of the at least one simulator spring ( 66 . 68 ) is increased, while by adjusting the piston component ( 56 ) the second partial volume ( 60 ) is reduced (S2); characterized by the steps of: forming the at least one second bore ( 64 ) on the housing such that as long as the piston component ( 56 ) is adjusted from its initial position by an adjustment smaller than a predetermined Grenzverstellweg, at least one of the inner volume ( 54 ) adjacent mouth area ( 70 ) of the at least one second bore ( 64 ) at least partially in the second sub-volume ( 60 ), while, as soon as the adjustment of the piston component ( 56 ) becomes larger than the predetermined Grenzverstellweg from its initial position, at least one Abdichtbereich ( 72 ) of the piston component ( 56 ) between the at least one mouth region ( 70 ) and the second subvolume ( 60 ) is pushed (S1); and forming at least one brake fluid path ( 74 ) in the piston component ( 56 ), that as soon as the adjustment of the piston component ( 56 ) becomes larger than the predetermined Grenzverstellweg from its initial position, the second sub-volume ( 60 ) over the at least one of the at least one sealing region ( 72 ) opening brake fluid path ( 74 ) with the at least one second bore ( 64 ) (S3). Manufacturing method for a hydraulic power unit ( 52 ) for a braking system of a vehicle, wherein a simulator device ( 50 ) by carrying out the method according to claim 10 in the hydraulic unit ( 52 ) is integrated.

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