CN101039826A - Brake-by-wire type brake system - Google Patents
Brake-by-wire type brake system Download PDFInfo
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- CN101039826A CN101039826A CN 200580034671 CN200580034671A CN101039826A CN 101039826 A CN101039826 A CN 101039826A CN 200580034671 CN200580034671 CN 200580034671 CN 200580034671 A CN200580034671 A CN 200580034671A CN 101039826 A CN101039826 A CN 101039826A
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- 230000003213 activating effect Effects 0.000 description 1
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Abstract
The invention relates to a brake-by-wire type braking system for a motor vehicle, comprising a brake pressure transducer (3, 4) which can be actuated by means of a brake pedal (1), said brake pressure transducer (3, 4) being connected to the wheel brake of the vehicle when the brake-by-wire operating mode is not active. The brake-by-wire type braking system also comprises a pressure source (3, 4, 5) which can be controlled by means of an electronic control unit (7) and said pressure source can be connected to the wheel brake of the vehicle when the brake-by-wire is in the operational mode, also comprising means (6) which are used to detects the driver's wish to slow down, a pedal travel simulator (2) which co-operates with the brake pedal (1) enabling a restoring force acting upon the brake pedal (1) to be simulated independently from the control of the pressure source when the brake-by-wire is in the operational mode and an electrohydraulic device (9) which can be controlled by means of an electronic control unit (7), said device enabling the brake-by-wire operational mode to be active when switched on and enabling the pedal travel simulator (2) to be switched on when the brake-by-wire mode is not active. The electrohydraulic device (9) is controlled by signals produced by the means (6) used to detect the driver's wish to slow down.
Description
Technical field
The present invention relates to a kind of " brake-by-wire " type brake system that is used to be equipped with (motor-driven) vehicle of CD-ROM drive motor, should " brake-by-wire " type brake system have:
A) brake pressure generator that can operate by means of operating pedal, this brake pressure generator can be connected with the car side brake of this vehicle in the time of not in " brake-by-wire " mode of operation,
B) can be by means of the pressure source of electronic control unit (ECU) actuating, this pressure source can be connected with the car side brake of this vehicle in " brake-by-wire " mode of operation,
C) be used to detect the device of chaufeur deceleration hope,
D) with the coefficient pedal stroke simulator of operating pedal, in " brake-by-wire " mode of operation by this pedal stroke simulator can with the actuating of this pressure source irrespectively dummy activity on this operating pedal reset force and
E) can be by means of the electro-hydraulic device of electronic control unit actuating, this electro-hydraulic device can be realized the connection of this pedal stroke simulator in " brake-by-wire " mode of operation, and can realize the shutoff of this pedal stroke simulator not in " brake-by-wire " mode of operation the time.
Background technology
This brake system is open by DE 10 2,004 011 622 A1.The electro-hydraulic device that is used to connect and turn-off the pedal stroke simulator in this formerly disclosed brake system is by cylinder-piston component formation, and the pressure chamber of this cylinder-piston component can be connected by means of the shutdown valve disconnection or with the pressure chamber that has lower pressure.But from the disclosure document, can not know activating any concrete hint of this shutdown valve.
Summary of the invention
Therefore, the objective of the invention is to, propose to be used to activate the measure of top described electro-hydraulic device.
According to the present invention, the feature of describing in the characteristic of this purpose by independent claims 1 and 2 realizes.Described measure makes chaufeur just obtain common pedal sense when operating brake pedal for the first time.
In the favourable improvement of the solution that proposes in claim 2, come the actuated electro-hydraulic device according to the signal of car door contact, signal that vehicle seat takies means of identification or the signal of vehicle remote operating control, wherein said signal conveys is given control unit.
In another favourable improvement of the solution that proposes in claim 1 or 2, electro-hydraulic device is made of cylinder-piston component, but this cylinder-piston component forms being connected of transmission power by means of the shutdown valve disconnection of electromagnetic ground operation and with the pedal stroke simulator.
Described piston preferably limits the border of the pressure chamber of hydraulic pressure, and this pressure chamber is connected with in the centre under the situation of shutdown valve and is connected with low-pressure chamber.Shutdown valve can or be designed to often to drive (SO-) valve or be designed to have the pressure confinement function, prestrain often drives (SO-) valve on closing direction.
In another significant form of implementation flexible program, the pedal stroke simulator has the simulator spring, this simulator spring be bearing on the operating pedal on the one hand or be bearing in power transmission part that brake pedal is connected on, be bearing on the other hand on the first arm of double-arm lever, this double-arm lever is mounted to and can rotates within the specific limits and second arm and the piston combined action of this double-arm lever.The first arm constitutes housing, and the simulator spring is arranged in this housing.
In another favourable form of implementation of theme of the present invention, the main brake cylinder that pressure source comprises brake booster and is connected the brake booster back, this brake booster not only can but also can have been operated by means of electronic control unit by means of brake pedal according to the chaufeur hope.Preferably be provided with such device at this, this device can make brake pedal engage with dockingundocking between the brake booster in " brake-by-wire " mode of operation.
Description of drawings
Describe other features and advantages of the present invention with reference to accompanying drawing in detail by means of two examples in the following description.Wherein:
Fig. 1 a illustrates the main portion of first form of implementation of the brake system according to the invention that is used for power actuated vehicle;
Fig. 1 b illustrates the simplified schematic view that electro-hydraulic device according to the brake system of Fig. 1 a is in active position not or returns level (R ü ckfallebene);
Fig. 1 c illustrates the simplified schematic view that is in " brake-by-wire " mode of operation according to the electro-hydraulic device of the brake system of Fig. 1 a;
Fig. 2 a illustrates the main portion of second form of implementation of the brake system according to the invention that is used for power actuated vehicle;
Fig. 2 b illustrates the simplified schematic view that electro-hydraulic device according to the brake system of Fig. 2 a is in active position not or returns level;
Fig. 2 c illustrates the simplified schematic view that is in " brake-by-wire " mode of operation according to the electro-hydraulic device of the brake system of Fig. 2 a.
The specific embodiment
First form of implementation of power actuated vehicle of the present invention " brake-by-wire " the type brake system shown in Fig. 1 a mainly comprises brake actuating unit 10, brake pedal 1, pedal stroke simulator 2, electronic control unit 7 and in case of necessity by connect the unshowned car side brake that fluid control or regulon are connected with brake actuating unit 10 in the centre.Brake actuating unit 10 comprises the brake booster 3 that is preferably vacuum brake booster, be connected brake booster 3 back preferably be the main brake cylinder 4 of series connected main brake cylinder and configuration pressure medium storage container 5 to main brake cylinder 4, the car side brake of above-mentioned power actuated vehicle is connected with the unshowned pressure chamber of this main brake cylinder.The brake pedal 1 that is used for driver's operation brake booster 3 is especially in " brake-by-wire " mode of operation and 2 combineds action of pedal stroke simulator, and this pedal stroke simulator makes chaufeur obtain common brake pedal feel.The decision design that is used to detect chaufeur deceleration hope must have redundant sensor device 6 to produce control signal according to the operation of brake pedal 1, this control signal flows to electronic control unit 7, the output signal of this electronic control unit also actuatable one unshowned electromagnet, this electromagnet disposes to brake booster 3 and is independent of driver intention ground operation compressed-air controlled control cock, and this control cock control air is to the conveying of brake booster 3.In " brake-by-wire " mode of operation, be arranged on the dockingundocking that endplay between the control plunger of the end of the piston rod 8 that engages with brake pedal 1 and above-mentioned control cock guarantees the transmission power between brake pedal 1 and the brake booster 3 and engage.
As previously mentioned, operation that can be by pedal stroke simulator 2 and brake booster 3 in " brake-by-wire " mode of operation is the reset force of dummy activity on brake pedal irrespectively, design this pedal stroke simulator like this, this pedal stroke simulator can be connected when making in " brake-by-wire " mode of operation the dockingundocking of the transmission power between brake pedal 1 and brake booster 3 engage, and can turn-off not in " brake-by-wire " mode of operation the time.Shown in the form of implementation pedal stroke simulator 2 connection and turn-off and undertaken by electro-hydraulic device, but mainly comprise can be by means of the cylinder-piston component 9 of the shutdown valve 14 open circuited hydraulic pressure of electromagnetic ground operation for described electro-hydraulic device.Cylinder-piston component 9 has the low-pressure chamber 13 by the pressure chamber 12 of the hydraulic pressure of piston 11 limited boundaries and the hydraulic pressure that is communicated with pressure chamber 12, and wherein, shutdown valve 14 can realize that described bonded assembly disconnects or connects as previously mentioned.But can be designed to by means of the shutdown valve 14 of operation of the actuated signal of electronic control unit 7 or conversion the electromagnetic ground operation, often open (SO-) two position two-way valve (referring to Fig. 1 b, 1c).12 boiler check valve 15 (referring to Fig. 1 b) that open wide are used for the pressure compensation between pressure chamber 12 and the low-pressure chamber 13 towards the pressure chamber.
In the first favourable form of implementation shown in Fig. 1 a, the pedal stroke simulator has stage clip 16, and this stage clip is clamped in brake pedal 1 or does not have between the power transmission part 17 and double-arm lever 18 that is connected on this brake pedal 1 with relatively rotating.Double-arm lever 18 is installed coaxially, also can be rotated within the specific limits with respect to this brake pedal biasing with respect to brake pedal 1, wherein, the first arm 19 of this double-arm lever is configured for the areal of support of stage clip 16, and second arm 20 of this double-arm lever is bearing on the hydraulic piston 11 of piston-cylinder assembly 9.
Under the situation that simulator spring 16 works, friction element 21 rests on the above-mentioned power transmission part 17.Friction element 21 and friction face 22 combineds action.Friction element 21 carrying out in this wise by putting by means of the abutment surfaces 23,24 that is provided with obliquely on power transmission part 17 makes can produce when operating pedal stroke simulator 2 friction element 21 is pressed in component on the friction face 22.Said elements 16,17,21,22 preferably is arranged in the housing 25, and this housing preferably designs integratedly with the first arm 19 of double-arm lever 18.
The principle of work of above-mentioned brake system is known for the professional who engages in " brake-by-wire " systems technology field.This brake system in shown in Fig. 1 a and also corresponding to the not active position that returns level (also referring to Fig. 1 b), the pressure chamber 12 of the hydraulic pressure of electro-hydraulic device 9 is connected with low-pressure chamber 13 by often opening shutdown valve 14.When operation brake pedal 1, the motion of this brake pedal is detected and reports to electronic control unit 7 by sensor device 6, this electronic control unit produces control signal simultaneously to encourage above-mentioned electromagnet and shutdown valve 14, thereby interrupt being connected between pressure chamber 12 and the low-pressure chamber 13, connect pedal stroke simulator 2 thus.Schematically show this state among Fig. 1 c.
Under the situation of vehicle electronics fault or car load circuit network fault, shutdown valve 14 is not convertible, brakes in returning level thus.When operation brake pedal 1, double-arm lever 18 rotates with brake pedal 1 under the situation that simulator spring 16 works, the left side of piston 11 in accompanying drawing of electro-hydraulic device 9 moved, and pressure medium is pushed into the low-pressure chamber 13 from pressure chamber 12.
In second form of implementation of brake system shown in Fig. 2 a-2c according to the present invention, electronic control unit 7 and control instrument 30 combineds action, the unshowned CD-ROM drive motor of this control instrument control vehicle.In addition, the signal 31 of car door contact, the signal 32 of seat occupancy means of identification or be used to the signal 33 of the remote control device that driver door unblanks to be fed to control instrument 30 and to be processed into actuated signal, this actuated signal (by electronic control unit 7) is as the change over signal that is used for above-mentioned shutdown valve 14.Because the principle of work of described device is corresponding to the principle of work of the brake system of describing in conjunction with Fig. 1 a-1c, so need not described again.
Certainly, can carry out modification within the scope of the invention.Therefore for example can use have the pressure confinement function, the shutdown valve of often opening of prestrain substitutes and often opens shutdown valve 14 on closing direction.
Claims (13)
1. " brake-by-wire " type brake system that is used for power actuated vehicle should " brake-by-wire " type brake system have:
A) can be by means of the brake pressure generator (3,4) of brake pedal (1) operation, this brake pressure generator can be connected with the car side brake of vehicle in the time of not in " brake-by-wire " mode of operation,
B) can be by means of the pressure source (3,4,5) of electronic control unit (7) actuating, this pressure source can be connected with the car side brake of vehicle in " brake-by-wire " mode of operation,
C) be used to detect the device (6) of chaufeur deceleration hope,
D) with the coefficient pedal stroke simulator of brake pedal (1) (2), in " brake-by-wire " mode of operation by this pedal stroke simulator can with the actuating of pressure source irrespectively dummy activity on this brake pedal (1) reset force and
E) can be by means of the electro-hydraulic device (9) of electronic control unit (7) actuating, this electro-hydraulic device can be realized the connection of pedal stroke simulator (2) and can realize the shutoff of pedal stroke simulator not in " brake-by-wire " mode of operation the time in " brake-by-wire " mode of operation
It is characterized in that: come actuated electro-hydraulic device (9) by the signal that produces by the described device (6) that is used to detect chaufeur deceleration hope.
2. " brake-by-wire " type brake system that is used to be equipped with the power actuated vehicle of at least one CD-ROM drive motor should " brake-by-wire " type brake system have:
A) can be by means of the brake pressure generator of operating pedal operation, this brake pressure generator can be connected with the car side brake of this vehicle in the time of not in " brake-by-wire " mode of operation,
B) can be by means of the pressure source of electronic control unit (ECU) actuating, this pressure source can be connected with the car side brake of vehicle in " brake-by-wire " mode of operation,
C) be used to detect the device of chaufeur deceleration hope,
D) with the coefficient pedal stroke simulator of operating pedal, in " brake-by-wire " mode of operation by this pedal stroke simulator can with the actuating of pressure source irrespectively dummy activity on this operating pedal reset force and
E) electro-hydraulic device that can activate by means of electronic control unit, this electro-hydraulic device can be realized the connection of pedal stroke simulator and can realize the shutoff of pedal stroke simulator not in " brake-by-wire " mode of operation the time in " brake-by-wire " mode of operation,
It is characterized in that: electronic control unit (7) and control instrument (30) combined action that is used for the controlling and driving motor make and come actuated electro-hydraulic device (9) by the signal that is produced by this control instrument (30).
3. according to the brake system of claim 2, it is characterized in that: the signal (31) according to the car door contact that flows to control instrument (30) comes actuated electro-hydraulic device (9).
4. according to the brake system of claim 2, it is characterized in that: the signal (32) that takies means of identification according to the vehicle seat that flows to control instrument (30) comes actuated electro-hydraulic device (9).
5. according to the brake system of claim 1, it is characterized in that: the signal (33) according to the vehicle remote operating control that flows to control instrument (30) comes actuated electro-hydraulic device (9).
6. according to the brake system of one of claim 1 to 5, it is characterized in that: but comprise can be by means of the open circuited cylinder-piston component of shutdown valve (14) (9) of electromagnetic ground operation for electro-hydraulic device, and the piston of this cylinder-piston component (11) is connected with pedal stroke simulator (2) formation transmission power.
7. according to the brake system of claim 6, it is characterized in that: piston (11) limits the border of the pressure chamber (12) of hydraulic pressure, and this pressure chamber is connected with in the centre under the situation of shutdown valve (14) and is connected with low-pressure chamber (13).
8. according to the brake system of claim 6 or 7, it is characterized in that: shutdown valve (14) is designed to often open (SO-) valve.
9. according to the brake system of claim 6 or 7, it is characterized in that: shutdown valve is designed to have the normally open valve pressure confinement function, prestrain on closing direction.
10. according to the brake system of one of claim 5 to 9, it is characterized in that: pedal stroke simulator (2) has simulator spring (16), this simulator spring is bearing in brake pedal (1) on the one hand and goes up or be bearing on the power transmission part (17) that is connected with this brake pedal (1), be bearing on the other hand on the first arm (19) of double-arm lever (18), this double-arm lever is mounted to and can rotates within the specific limits and second arm (20) of this double-arm lever and piston (11) combined action.
11. the brake system according to claim 10 is characterized in that: the first arm (19) constitutes housing (25), and simulator spring (16) is arranged in this housing.
12. brake system according to one of aforementioned claim, it is characterized in that: the main brake cylinder (4) that pressure source comprises brake booster (3) and is connected this brake booster (3) back, this brake booster not only can but also can have been operated by means of electronic control unit (7) by means of brake pedal (1) according to the chaufeur hope.
13. the brake system according to claim 12 is characterized in that: be provided with such device, this device can make the dockingundocking of the transmission power between brake pedal (1) and the brake booster (3) engage in " brake-by-wire " mode of operation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004050287.0 | 2004-10-15 | ||
| DE102004050287 | 2004-10-15 | ||
| DE102005049199.5 | 2005-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101039826A true CN101039826A (en) | 2007-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200580034671 Pending CN101039826A (en) | 2004-10-15 | 2005-10-14 | Brake-by-wire type brake system |
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| Country | Link |
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| CN (1) | CN101039826A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102791548A (en) * | 2010-03-16 | 2012-11-21 | 罗伯特·博世有限公司 | Brake booster having flexible actuation |
| CN101559768B (en) * | 2009-06-01 | 2012-11-28 | 奇瑞汽车股份有限公司 | Automobile braking system based on wire control |
| 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 |
| CN110979275A (en) * | 2019-12-20 | 2020-04-10 | 湘潭大学 | Brake pedal displacement detection device and detection method |
| CN113370948A (en) * | 2020-03-10 | 2021-09-10 | 丰田自动车株式会社 | Vehicle braking/driving force control device |
| CN113573955A (en) * | 2019-02-12 | 2021-10-29 | 爱皮加特股份公司 | Actuating device for a fully or partially hydraulically operated brake system for a vehicle |
-
2005
- 2005-10-14 CN CN 200580034671 patent/CN101039826A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559768B (en) * | 2009-06-01 | 2012-11-28 | 奇瑞汽车股份有限公司 | Automobile braking system based on wire control |
| CN102791548A (en) * | 2010-03-16 | 2012-11-21 | 罗伯特·博世有限公司 | Brake booster having flexible actuation |
| CN102791548B (en) * | 2010-03-16 | 2016-01-20 | 罗伯特·博世有限公司 | There is the brake booster of flexible flip flop equipment |
| 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 |
| CN113573955A (en) * | 2019-02-12 | 2021-10-29 | 爱皮加特股份公司 | Actuating device for a fully or partially hydraulically operated brake system for a vehicle |
| CN113573955B (en) * | 2019-02-12 | 2024-06-07 | 爱皮加特股份公司 | Actuating device for a fully or partially hydraulically operated braking system for a vehicle |
| CN110979275A (en) * | 2019-12-20 | 2020-04-10 | 湘潭大学 | Brake pedal displacement detection device and detection method |
| CN113370948A (en) * | 2020-03-10 | 2021-09-10 | 丰田自动车株式会社 | Vehicle braking/driving force control device |
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