CN101115647A - Brake actuating unit for actuating an automotive braking system - Google Patents
Brake actuating unit for actuating an automotive braking system Download PDFInfo
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- CN101115647A CN101115647A CNA2006800044126A CN200680004412A CN101115647A CN 101115647 A CN101115647 A CN 101115647A CN A2006800044126 A CNA2006800044126 A CN A2006800044126A CN 200680004412 A CN200680004412 A CN 200680004412A CN 101115647 A CN101115647 A CN 101115647A
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- 208000027418 Wounds and injury Diseases 0.000 abstract description 3
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- 238000006073 displacement reaction Methods 0.000 description 4
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Abstract
The invention relates to a brake actuating unit for actuating an automotive braking system of the brake-by-wire type. Said unit comprises a) a brake booster, which can be actuated according to the driver's wishes both by means of a brake pedal as well as by means of an electronic control unit, whereby means are provided for decoupling a force-transmitting connection between the brake pedal and the brake booster in the brake-by-wire operating mode; b) a master cylinder connected downstream from the brake booster; c) means for detecting the driver's wish to slow down, and; d) a pedal travel simulator, which interacts with the brake pedal and with which, in the brake-by-wire operating mode, a restoring force acting upon the brake pedal can be simulated independent of an actuation of the brake booster, and which, in the brake-by-wire operating mode, can be switched on when decoupling the force-transmitting connection between the brake pedal and the brake booster and can be switched off when the brake-by-wire operating mode is not active; whereby e) a mechanical connection between the brake booster and the brake pedal is provided and allows a transmission of the tensile force supplied by the brake booster to the brake pedal, and which is configured by two elements of an actuating rod actuating the control valve of the brake booster, which are capable of making a relative movement in relation to each other, whereby the first element is connected to the valve piston of the control valve and the second element is connected to the brake pedal in a force-transmitting manner. The aim of the invention is to eliminate the risk of injuries involved during inspection of a simulator shut-down and simultaneous maintenance work on the braking system. For this purpose, an elastic element (11) is interposed between the two elements (8, 9) and is compressed by the electronic control unit when the brake booster (1) is actuated independent of the driver's wish.
Description
Technical field
The present invention relates to a kind of brake actuating unit that is used for operating the motor vehicle braking systems of " brake-by-wire " type, this brake actuating unit comprises
A) both can also can be by means of electronic control unit, according to the brake servo unit of driver intention operation by means of acceleration pedal, wherein be provided with the dockingundocking bonded assembly device that is used for making the power of transmitting between brake pedal and the brake servo unit at the mode of operation of " brake-by-wire "
B) be arranged on the main brake cylinder in brake servo unit downstream,
C) be used to obtain the chaufeur deceleration intention device and
D) with the coefficient pedal stroke simulator of brake pedal, can in the mode of operation of " brake-by-wire ", operate the restoring force of dummy activity on brake pedal irrespectively by this simulator with brake servo unit, and in the mode of operation of " brake-by-wire ", startup when described simulator can transmit power between brake pedal and brake servo unit dockingundocking engages, and beyond the mode of operation of " brake-by-wire ", close, wherein
E) mechanical connection that between brake servo unit and brake pedal, is provided with, this connection makes the pulling force that is brought by brake servo unit can be delivered on the brake pedal, described connection is formed by two parts of the control lever of the control cock operation of brake servo unit, described two parts can carry out relative motion each other, wherein first is connected with the valve piston of control cock, and second portion and brake pedal are connected in the mode of transmitting power and telescopic be directed in first.
Background technology
Such operating unit is disclosed in DE 102004011622 A1.In such electro-hydraulic brake system, when particularly when vehicle stops, carrying out self check and system compensation, need initiatively not produce wheel brake pressure under the situation to the brake pedal operation at chaufeur.For example be provided with before beginning to travel for this reason the starting brake system (by as the remote control of central controlled lock system or door contact start/wake up (Wake-Up)) time what is called of carrying out travel preceding detection or the cleaning and the correction routine of execution after closing ignition device.
When simultaneously brake equipment being carried out handling labor, for example carry out, when not operating under the situation of brake pedal, initiatively produce pressure in Parking for simulator cutting out detect, can cause potential danger (risk of crushing).At this moment, although can be with respect to law factor (product reliability), yet wish that still self has intelligence system, is subjected to grievous injury to prevent the occupant at least by the warning in vehicle handbook or maintenance instruction (MI) indication.
Summary of the invention
Therefore the objective of the invention is to, a kind of operating unit of aforementioned type is provided, the danger that injury takes place can be eliminated in this unit.
Described purpose realizes by between described two parts elastic element being set according to the present invention, when irrespectively operating brake servo unit by electronic control unit with driver intention, compresses this elastic element.
In order to specifically describe thought of the present invention, a kind of advantageous embodiment structure of the present invention is imagined, and described elastic element is designed to radially surround the compression spring of first.
In the advantageous embodiment structure of the solution that claim 1 or 2 provides, second portion has backstop, and after the compression spring compression, described backstop makes can drive second portion by first.
Imagine in another particularly preferred form of implementation according to the content of the present invention of claim 4, first is directed in second portion telescopicly, and elastic element is formed by the latch elements that is arranged on elastic tensions lockable mechanism, two preferred positioned opposite between described two parts at least.
Another of the solution that provides in claim 4 preferably improves in the structure, and when the power that surpasses with a regulation of the direction of operating acting in opposition of brake servo unit, described two parts can be separated from each other.
Another advantageous embodiment structure of the present invention is that lockable mechanism is arranged on the end of second portion away from brake pedal.
In another advantageous embodiment structure of the present invention, latch elements on the direction of lockable mechanism release with the inclined-plane combined action that in first, forms.
A kind of form of implementation that can make economically and work reliably especially of content of the present invention is characterised in that the locking element of elastic tension is designed to spheroid.
The preferred improvement project of another of content of the present invention is, software technology method (Mittel) is set, and distributes less car retardation for the brake pedal operational stroke of determining when occurring not jeopardizing safe fault/mistake (Fehler).
Another reasonably improves the form of implementation imagination the present invention, closes simulator when occurring jeopardizing safe fault in short time.
Description of drawings
Characteristics of the present invention and advantage will obtain more detailed explanation in the explanation to two embodiment below with reference to the accompanying drawings.Wherein:
Fig. 1 is the part sectional view according to first embodiment of brake actuating unit of the present invention, wherein realizes the starting of pedal stroke simulator by hydraulic efficiency gear and closes;
The chart of the characteristic quantity of operating unit according to the present invention that Fig. 2 a, 2b and 3a, 3b are is used to illustrate function of the present invention;
Fig. 4 be the brake actuating unit according to the present invention second embodiment with the corresponding part sectional view of Fig. 1; And
Fig. 5 a, 5b illustrate the other chart of the characteristic quantity of the operating unit according to the present invention, are used to illustrate function of the present invention.
The specific embodiment
The aforementioned structure that is used for the brake actuating unit of operation " brake-by-wire " type motor vehicle braking systems is disclosed in described DE 102004011622 A1 of specification sheets the beginning part.Therefore only illustrate brake servo unit in the drawings with semi-sictional view, described servo-unit is preferably low pressure brake servo unit 1, the control cock 2 of this low pressure brake servo unit 1 can irrespectively be operated by means of electromagnet 10 with the intention of chaufeur on the other hand by means of brake pedal 3 by driver's operation on the one hand.The stroke of the movable wall of brake servo unit 1 is measured by means of displacement pickup (BWS), and the deceleration intention of chaufeur is obtained by means of sensor device (PAS).Because displacement pickup and sensor device are fully open in aforementioned open file, so do not illustrate in the accompanying drawings.Particularly in the mode of operation of " brake-by-wire ", with brake pedal 3 coefficient pedal stroke simulators 4 and electric liquid closing appliance 5 combineds action, described simulator 4 makes chaufeur obtain the brake pedal feel of custom, and described closing appliance 5 cuts out pedal stroke simulator 4 when the mode of operation of non-" brake-by-wire ".Shown in implement, pedal stroke simulator 4 is outside the power transmission stream/power bang path (Kraftfluss) between brake pedal 3 and the brake servo unit 1.
Be used for to be delivered to the control plunger 6 of control cock 2 at the operating effort of brake pedal 3 places introducing with brake pedal 3 bonded assembly piston rods 7, this piston rod 7 is designed to two-part, and comprise with valve piston 6 bonded assembly firsts 8 and with brake pedal 3 bonded assembly second portions 9.Between these two parts 8,9, be provided with endplay " a ", this gap " a " guaranteed in the mode of operation of " brake-by-wire " being connected of the power of between brake pedal 3 and brake servo unit 1, transmitting (can) throw off.
As further illustrating among the figure, the section that first 8 sets to brake pedal 3 is provided with stepped hole 13, and this stepped hole partly holds second portion 9 and is used to guide second portion 9.Here, on action effect, be provided with elastic element 11 between two parts 8,9 like this, that is, and when two parts 8,9 opposite to each other during relative motion or in the drawings when first 8 is moved to the left, described elastic element is compressed.Elastic element 11 is preferably designed to the compression spring 12 that radially surrounds second portion 9.
When the function of the mobility of checking hydraulic piston 52 or shutoff valve 55, the aforementioned electromagnet 10 of control starting.The control assembly that comprises the first 8 of piston rod 7 thus is moved to the left in the drawings, and wherein first 8 drives the second portion 9 of back and drives brake pedal 3 thus by backstop 14 in stroke " b " back of determining.The signal of displacement pickup BWS and the signal of sensor device PAS are compared.Failure-free function is shown in Fig. 2 a, the 2b, wherein Fig. 2 a illustrates the output signal of BWS and PAS, and Fig. 2 b is illustrated in the hydraulic pressure P (THZ) that introduces in the unshowned main brake cylinder that is connected to brake servo unit 1 back and act on operating effort F on the brake pedal 3
BetRelation with operational stroke s.When test process began, the power output of the voltage of BWS and the pressure of master cylinder or brake servo unit raise.Behind the skew LAP, insert the PAS signal, and brake pedal 3 moves with the application force that reduces.
If in detection, break down (piston 52 blocks, valve 55 obstructions, brake pedal 3 kaysers etc.), by having controlled the pre-tensioning spring 12 of motor magnet 10 pressings to aforementioned closing appliance 5.Corresponding characteristic curve is shown in Fig. 3 a, the 3b.
Among second embodiment of content of the present invention shown in Figure 4, the second portion 90 that sets to brake pedal 3 is provided with hole 130, and this bore portion ground is admitted first 80 and is used to guide first.The end away from brake pedal 3 at second portion 90 is provided with lockable mechanism 110, and this mechanics limit first 80 is with respect to the relative motion of second portion 90.In the embodiment shown, described lockable mechanism is made of latch elements 130 two arranged offset, that radially be directed in second portion 90 and the inclined-plane 140 that forms in first 80 at least, and wherein latch elements is designed to the spheroid by means of unshowned tensioned.
To the movability of hydraulic piston 52,60 in other words the function of shutoff valve 55 detection or at each glancing impact or only be before the vehicle entry into service, to carry out in other words in the braking procedure of determining.Here, the control cock 6 of brake servo unit 1 is by means of the 10 control startings of aforementioned electric magnet, thereby the first 80 of control lever 7 is at first to being moved to the left in the drawings.Move through stroke " b " afterwards in first 80, drive second portion 90 and brake pedal 3 by Locking Device 110.After power on acting on brake pedal 30, opposite with direction of operating had increase slightly, first 80 was disengaged with second portion 90, thereby can the danger of pushing not take place owing to carrying mobile brake pedal 3.
When brake system according to the invention is moved, when brake snub or full application of brake under the situation that is moved beyond default stroke in advance of the moving end-wall of brake servo unit 1, be to exist gas or hydraulic efficiency pressure system to have under the situation of leakage in the system, must guarantee that aforementioned safety distance " b " can not use up.In this case, because this pedal will remain on its current position when discharging brake pedal 3, so no longer can make system accept driver intention by discharging brake pedal 3; This means, can not release the brake, and the sensor device (PAS) that detects accelerator travel can not recognize the brake pedal return movement, thereby keep vehicle is braked constantly from its current location.Although the pin of chaufeur is taken away from brake pedal 3, because brake pedal 3 remains on current location by brake servo unit 1, brake pedal 3 can not return automatically.
, carry out credibility between the signal of displacement pickup (BWS) of stroke of moving end-wall of brake servo unit 1 and address inquires to (Plausibilit tsabfrage) obtaining the sensing system of driver intention (PAS) signal and obtain particularly in conjunction with as described in Fig. 3 a, the b as top.If two values that match each other in credibility is addressed inquires to differ very big each other, or above the threshold value of stipulating, the then measure of executive software technology, the effect of described measure is shown in Figure 5, and Fig. 5 shows the relation of the operational stroke s of car retardation V and brake pedal 3.Wherein use V
1Express the feature (curve) of trouble free system, and used V
2Expressed the feature (curve) that the system of aforementioned fault wherein occurred.Shown in the figure of figure tabular form among Fig. 5, can guarantee feature (curve) by " elongation " by suitable software approach, in other words, will distribute to identical deceleration value than long brake-pedal travel s.Therefore,, in normal brake system, only need the pedal stroke s of about 25mm for reaching for example 40% deceleration value, and the pedal stroke s of about 55mm that in having the system of fault, must pass by.Described measure is particularly suitable when occurring not jeopardizing safe fault.
When occurring in the system jeopardizing safe fault, then close pedal stroke simulator 4 in short time, promptly aforementioned valve 55 is opened, thereby under the situation that does not increase operating effort, the operational stroke of long brake pedal 3 that obtains realizing this moment.The performance of system is shown in Fig. 5 b.Wherein by F
1The feature of expression trouble free system, and by F
2The system of aforementioned fault wherein appears in expression.
When this phenomenon occurring, produce warning signal vision or sound, thus driver, braking function is in the improper state, and it can mean, exists too much air or this state to be caused by leakage in the system.
Claims (12)
1. brake actuating unit that is used for operating the motor vehicle braking systems of " brake-by-wire " type comprises:
A) both can also can be by means of the brake servo unit of electronic control unit according to driver intention operation by means of acceleration pedal, wherein be provided with the mode of operation that is used at " brake-by-wire " and make the device that transmits the dockingundocking of power between brake pedal and the brake servo unit
B) be arranged on the main brake cylinder in brake servo unit downstream,
C) be used to obtain the chaufeur deceleration intention device and
D) with the coefficient pedal stroke simulator of brake pedal, can in the mode of operation of " brake-by-wire ", operate the restoring force of dummy activity on brake pedal irrespectively by this simulator with brake servo unit, and start described simulator when can be in the mode of operation of " brake-by-wire " between brake pedal and brake servo unit, transmitting the dockingundocking of power, and beyond the mode of operation of " brake-by-wire ", close described simulator, wherein
E) mechanical connection portion is set between brake servo unit and brake pedal, this connecting portion makes the pulling force that is brought by brake servo unit can be delivered on the brake pedal, described connecting portion is made up of two parts of the control lever of the control cock of operation brake servo unit, described two parts can carry out relative motion each other, wherein first is connected with the valve piston of control cock, and second portion is connected in the mode of transmitting power with brake pedal, it is characterized in that, at described two parts (8,9) elastic element that is furnished with between (11) compresses this elastic element (11) when irrespectively operating brake servo unit (1) by electronic control unit with driver intention.
2. according to the brake actuating unit of claim 1, it is characterized in that described elastic element (11) is designed to compression spring (12).
3. according to the brake actuating unit of claim 1 or 2, it is characterized in that described second portion (9) is directed telescopicly in described first (8), and compression spring (12) radially surrounds described second portion (9).
4. according to the brake actuating unit of claim 3, it is characterized in that described second portion (9) has backstop (14), behind compression spring, this backstop makes can be by driving described second portion (9) in the described first (8).
5. according to the brake actuating unit of claim 1, it is characterized in that, described first (80) is directed in described second portion (90) telescopicly, described elastic element by be arranged on lockable mechanism (110) between described two parts (80,90), at least two preferably the latch elements of positioned opposite (130) form.
6. according to the brake actuating unit of claim 5, it is characterized in that when the predetermined force that surpasses with the direction of operating opposite effect of brake servo unit (1), described two parts (80,90) can be separated from one another.
7. according to the brake actuating unit of claim 5 or 6, it is characterized in that described lockable mechanism (110) is arranged on the end of second portion (90) away from described brake pedal (3).
8. according to each brake actuating unit in the claim 5 to 7, it is characterized in that, described latch elements (130) along the direction of the release of lockable mechanism (110) with go up inclined-plane (140) combined action that forms in described first (80).
9. according to each brake actuating unit in the claim 5 to 8, it is characterized in that described latch elements (130) is designed to by means of the pre-tensioned spheroid of spring.
10. according to each brake actuating unit in the claim 1 to 9, it is characterized in that, be provided with the software technology method, this method is distributed long brake pedal (3) stroke (s) for the car retardation of determining (V) when taking place not jeopardize safe fault.
11., it is characterized in that pedal is closed simulator (4) in short time when occurring jeopardizing safe fault according to each brake actuating unit in the claim 1 to 9.
12. the brake actuating unit according to claim 10 or 11 is characterized in that, is arranged on the device that produces the warning signal of the vision or the sense of hearing when breaking down.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005005628.8 | 2005-02-08 | ||
| DE102005005628 | 2005-02-08 | ||
| DE102005052310.2 | 2005-11-01 | ||
| DE102005059746.7 | 2005-12-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101115647A true CN101115647A (en) | 2008-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800044126A Pending CN101115647A (en) | 2005-02-08 | 2006-02-08 | Brake actuating unit for actuating an automotive braking system |
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| Country | Link |
|---|---|
| CN (1) | CN101115647A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103802802A (en) * | 2012-11-13 | 2014-05-21 | 现代自动车株式会社 | Brake control system and method having variable braking modes |
| CN107697041A (en) * | 2016-08-08 | 2018-02-16 | 通用汽车环球科技运作有限责任公司 | Vehicle line control brake system with brake pedal emulator override device |
| CN109484380A (en) * | 2017-09-11 | 2019-03-19 | 北京凌云智能科技有限公司 | A kind of integrated form braking system and its application method |
| CN111418314A (en) * | 2014-05-27 | 2020-07-17 | 株式会社久保田 | Working machine |
| CN114222687A (en) * | 2019-08-29 | 2022-03-22 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Operating unit for a hydraulically operable brake system and corresponding brake system |
| CN116101240A (en) * | 2021-11-10 | 2023-05-12 | 长沙泊呈科技有限公司 | Pedal simulator for vehicle braking system and braking method |
-
2006
- 2006-02-08 CN CNA2006800044126A patent/CN101115647A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103802802A (en) * | 2012-11-13 | 2014-05-21 | 现代自动车株式会社 | Brake control system and method having variable braking modes |
| CN103802802B (en) * | 2012-11-13 | 2018-01-23 | 现代自动车株式会社 | Braking control system and method with variable braking pattern |
| CN111418314A (en) * | 2014-05-27 | 2020-07-17 | 株式会社久保田 | Working machine |
| CN107697041A (en) * | 2016-08-08 | 2018-02-16 | 通用汽车环球科技运作有限责任公司 | Vehicle line control brake system with brake pedal emulator override device |
| CN109484380A (en) * | 2017-09-11 | 2019-03-19 | 北京凌云智能科技有限公司 | A kind of integrated form braking system and its application method |
| CN114222687A (en) * | 2019-08-29 | 2022-03-22 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Operating unit for a hydraulically operable brake system and corresponding brake system |
| CN114222687B (en) * | 2019-08-29 | 2024-02-13 | 大陆汽车科技有限公司 | Operating unit for a hydraulically actuated brake system and corresponding brake system |
| CN116101240A (en) * | 2021-11-10 | 2023-05-12 | 长沙泊呈科技有限公司 | Pedal simulator for vehicle braking system and braking method |
| CN116101240B (en) * | 2021-11-10 | 2024-04-23 | 长沙泊呈科技有限公司 | Pedal simulator for vehicle braking system and braking method |
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