GB2530371A - Braking system for a vehicle, in particular a motor vehicle - Google Patents

Braking system for a vehicle, in particular a motor vehicle Download PDF

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Publication number
GB2530371A
GB2530371A GB1511433.3A GB201511433A GB2530371A GB 2530371 A GB2530371 A GB 2530371A GB 201511433 A GB201511433 A GB 201511433A GB 2530371 A GB2530371 A GB 2530371A
Authority
GB
United Kingdom
Prior art keywords
signal
vehicle
brake
braking
braking device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB1511433.3A
Other versions
GB201511433D0 (en
Inventor
Venugopal Reddi
Avinash Varagiri
Ramanathan Ranganathan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
Original Assignee
Daimler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimler AG filed Critical Daimler AG
Priority to GB1511433.3A priority Critical patent/GB2530371A/en
Publication of GB201511433D0 publication Critical patent/GB201511433D0/en
Publication of GB2530371A publication Critical patent/GB2530371A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/08—Brake-action initiating means for personal initiation hand actuated
    • B60T7/085—Brake-action initiating means for personal initiation hand actuated by electrical means, e.g. travel, force sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B60T7/22—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle, or by means of contactless obstacle detectors mounted on the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/02—Active or adaptive cruise control system; Distance control
    • B60T2201/022—Collision avoidance systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2220/00—Monitoring, detecting driver behaviour; Signalling thereof; Counteracting thereof
    • B60T2220/04—Pedal travel sensor, stroke sensor; Sensing brake request

Abstract

A braking system, for a motor vehicle, comprises at least one control element 11 having a brake pedal 12, a pressure sensor and an angle sensor. The brake pedal is actuated by a driver of the vehicle and wirelessly transmits at least one first signal 15 which has a value that is indicative of a braking force for braking the vehicle. The value of the first signal 15 is dependent on pressure detected by the pressure sensor and/or an angle detected by the angle sensor. First signal 15 is wirelessly transmitted to at least one control unit 22 which, on a basis of the first signal 15, generates and wirelessly transmits a control signal 24 to a braking device 16 so as to control the braking device 16 and brake a wheel. A wheel speed sensor wirelessly transmits a speed signal to the control unit 22 which generates the control signal 24 based on the first signal 15 and the speed signal. The signals may be radio-frequency identification technology.

Description

Braking System for a Vehicle, in particular a Motor Vehicle The invention relates to a braking system for a vehicle, in particular a motor vehicle.
Braking systems for vehicles, in particular motor vehicles, are well-known from the general prior art. Conventionally, a braking system comprises a brake pedal arranged in the interior of the vehicle, wherein the brake pedal can be actuated by a foot of the driver of the vehicle. Moreover, a conventional braking system comprises at least one first brake element such as, for example, a brake disk connected to a wheel hub in a rotationally fixed manner. At least one wheel of the vehicle can be fixed to the wheel hub in a rotationally fixed manner so that the wheel and, thus, the vehicle can be decelerated by means of the brake disk or the first brake element. Moreover, the braking system comprises at least one second brake element such as a brake pad which can be moved into contact with the first brake element thereby decelerating the first brake element and, thus, the wheel hub and the wheel. Moreover, conventionally, the brake pedal is hydraulically coupled to the second brake element so that the second brake element can be hydraulically moved by actuating the brake pedal.
Moreover, US 7 084 748 B2 shows a communication device for communication along a communication path between control elements which are actuated by a driver of a vehicle and emit control signals. The communication device comprises controlled devices of the vehicle which receive the control signals and convert the control signals into responses in or on the controlled devices. A conventional braking system usually comprises a high number of parts and is thus a high complexity.
Therefore, it is an object of the present invention to provide a braking system having a particularly low complexity.
This object is solved by a braking system having the features of patent claim 1.
Advantageous embodiments with expedient developments of the invention are indicated in the other patent claims.
The invention relates to a braking system for a vehicle, in particular a motor vehicle, the braking system comprising at least one braking device configured to brake at least one wheel of the vehicle. For example, the braking device comprises at least one first brake element such as, for example, a brake disk which is connected to a wheel hub in a rotationally fixed manner, wherein the wheel can be connected to the wheel hub.
Moreover, for example, the braking device comprises at least one second brake element such as, for example, a brake pad which can be moved into contact with the first brake element thereby decelerating the first brake element and, thus, the wheel hub, the wheel and the vehicle.
The braking system according to the present invention further comprises at least one control element configured to be actuated by the driver of the vehicle. For example, the control element is arranged in the interior of the vehicle. Moreover, the control element can comprise a pedal such as a brake pedal which can be actuated by a foot of the driver.
The control element is configured to wirelessly transmit at least one first signal due to the actuation of the control element, the first signal being indicative of a braking force for braking the vehicle. In other words, the first signal is indicative of a brake demand by the driver. If the driver wishes to decelerate the vehicle, the driver actuates said control element thereby demanding a braking force for braking or decelerating the wheel and, thus, the vehicle.
The braking system according to the present invention further comprises at least one electronic control unit configured to wirelessly receive the first signal. Moreover, the electronic control unit is configured to generate at least one control signal on the basis of the first signal, and transmit the control signal to the braking device. The braking device is configured to receive the control signal thereby controlling the braking device so as to brake the wheel and, thus, the vehicle by means of the braking device. For example, said second brake element is moved into contact with said first brake element on the basis of the control signal and, thus, on the basis of the first signal thereby decelerating the wheel and, thus, the vehicle. Preferably, the electronic control unit is configured to wirelessly transmit the control signal to the braking device which is configured to wirelessly receive the control signal.
The idea behind the invention is to connect the control element with the electronic control unit and, for example, the electronic control unit with the braking device in a wirelessly manner so that, in comparison with conventional braking systems, a brake booster, hydraulic elements, a pedal simulator and wiring harnesses can be eliminated so that the number of parts and, thus, the complexity of the braking system according to the present invention can be kept particularly low.
Either radio-frequency identification (REID) technology or any other wireless based communication technology is used to wirelessly transmit and receive the respective signal. In other words, REID technology is used to actuate or operate the braking device, wherein the actuation of the second brake element can either be through a hydraulic system or an electric motor, for example. However, preferably, the braking device is a stand-alone braking unit or braking module configured to receive the control signal in a wirelessly manner so that, for example, the hydraulic system or the electric motor of the braking device is configured to be operated by the wirelessly received control signal.
Further advantages, features, and details of the invention derive from the following description of a preferred embodiment as well as from the drawing. The features and feature combinations previously mentioned in the description as well as the features and feature combinations mentioned in the following description of the figures and/or shown in the figures alone can be employed not only in the respectively indicated combination but also in other combination or taken alone without leaving the scope of the invention.
The drawings show in: Fig. 1 a schematic view of a vehicle in the form of a motor vehicle comprising a braking system in which signals are wirelessly transmitted and received to brake the vehicle; and Fig. 2 a further schematic view of the braking system according to Fig. 1.
In the figures the same elements or elements having the same function are indicated by the same reference signs.
Fig. 1 shows in a schematic view a vehicle in the form of a motor vehicle which is configured as a passenger vehicle. The vehicle has a braking system 10 configured to decelerate or brake wheels of the vehicle and, thus, the vehicle itself. As can be seen from Fig. 1, the braking system 10 comprises a control element 11 having a brake pedal 12, at least one angle sensor and at least one pressure sensor. The brake pedal 12 is arranged in the interior of the vehicle. The driver of the vehicle can actuate and, thus, move the brake pedal 12 by their foot 14. The angle sensor is configured to detect an angle and/or a distance the brake pedal 12 is moved by the driver's foot 14.
The pressure sensor is configured to detect a pressure exerted on the brake pedal by the driver's foot 14 when the driver actuates the brake pedal 12. Thus, the brake pedal 12, the angle sensor and the pressure sensor are parts of the control element 11 which is, for example, a brake pedal unit (BRU). The brake pedal unit (control element 11) is configured to wirelessly transmit at least one first signal 15 due to the actuation of the brake pedal 12, the first signal 15 being indicative of a braking force for braking the vehicle. In other words, the first signal 15 is indicative of a brake demand issued by the driver in such a way that the driver actuates the brake pedal by their foot 14. The first signal 15, in particular its value, is dependent on the angle detected by the angle sensor and/or the pressure detected by the pressure sensor. For example, the higher the angle and/or the higher the pressure is the higher is the value of the first signal 15 and, thus, the higher is the demanded braking force for braking the vehicle.
The braking system 10 further comprises a braking device 16 per wheel of the vehicle.
This means each wheel of the vehicle is equipped with a braking device 16. For example, the vehicle comprises a plurality of wheel hubs, wherein at least one wheel can be connected to each wheel hub in a rotationally fixed manner. The respective braking device 16 comprises a first brake element in the form of a brake disk 18 connected to the respective wheel hub in a rotationally fixed manner. Moreover, the respective braking device 16 comprises a brake caliper 20 which is attached to the body of the vehicle at least indirectly. Furthermore, the respective braking device 16 comprises at least one second brake element in the form of a brake pad which cannot be seen in Fig. 1. The respective brake pad is movably held on the respective brake caliper 20 so that the brake pad can be moved into contact with the respective brake disk 18 thereby generating friction between the respective brake pad and the respective brake disk 18 so as to decelerate or brake the brake disk 18 and, thus, the wheel hub, the respective wheel and, thus, the vehicle as a whole.
The braking system 10 further comprises at least one electronic control unit 22 which is also referred to as a brake control unit (BCU). The electronic control unit 22 is configured to wirelessly receive the first signal 15, generate at least one control signal 24 on the basis of the first signal, 15, and transmit the control signal 24 to the respective braking device 16. The respective braking device 16 is configured to receive the respective control signal 24 thereby controlling the respective braking device 16 so as to brake the respective wheel by means of the respective braking device 16. As can be seen from Fig. 1, the electronic control unit 22 is configured to wirelessly transmit the respective control signal 24 to the respective braking device 16 which, in turn, is configured to wirelessly receive the respective control signal 24. As can be seen from Fig. 1, the vehicle further comprises a further electronic control unit 26, wherein the electronic control units 22 and 26 are configured to wirelessly exchange at least one second signal 28.
In the event of failure of the BCU (electronic control unit 22), the electronic control unit 26 being the main vehicle ECU would take control and send a signal 29 to the parking brake unit to reduce the speed and stop the vehicle.
This means the BCU processes the first signal 15 received from the BPU thereby generating the control signal 24. Then, the BCU sends the control signal 24 to the individual braking device 16 to apply the brakes and stop the vehicle or to reduce the speed of the vehicle. The respective braking device 16 is configured as a disk brake module unit (DBM) wherein, for example, the respective brake pad can be moved, i.e. actuated by a hydraulic system or an electric motor.
Preferably, the respective braking device 16 comprises at least one wheel speed sensor configured to detect a rotational speed of the respective wheel. Moreover, the wheel speed sensor is configured to provide a speed signal indicative of the detected rotational speed. Furthermore, the respective wheel speed sensor is configured to wirelessly transmit the speed signal to the electronic control unit 22 which is configured to wirelessly receive the speed signal. Thus, preferably, the electronic control unit 22 is configured to generate the respective control signal 24 on the basis of the first signal 15 and the respective speed signal. For example, the respective wheel speed sensor (WSS) is capable of detecting a locking of the respective wheel. In case any locking is detected, the speed signal is indicative of the detected locking so that the BCU can take necessary action to end the locking of the respective wheel. Said communications between the brake pedal unit and the brake control unit, the disk brake module unit and the wheel speed sensor happen by means of wireless technology such as RFID (radio-frequency identification) technology or any other wireless based communication technology.
The vehicle further comprises a detection unit 30 which is, for example, configured as a braking assistant or distronic. The detection unit 30 is configured to detect at least one distance between the vehicle and at least one object in the surroundings of the vehicle.
For example, said object is another traffic participant such as another vehicle. For example, when the detection unit 30 detects that the speed of the vehicle is higher than the speed of said object so that the distance between the vehicle and said object decreases, the detection unit 30 determines that braking is required. Thus, the detection unit 30 wirelessly transmits a third signal 32 indicative of the required braking, wherein the electronic control unit 22 is configured to wirelessly receive the third signal 32. For example, a warning signal 34 can be output in the interior of the vehicle so that the driver of the vehicle can be instructed to brake in order to avoid a collision of the vehicle and said object. If the electronic control unit 22 and/or the detection unit 30 determines that the driver does not actuate the brake pedal 12 or that the driver actuate the brake pedal 12 insufficiently, the respective control signal 24 is generated on the basis of the first signal 32 in such a way that a collision between the vehicle and said object can be automatically avoided. In this case, the respective braking device 16, in particular the respective brake pad is pushed against the respective brake disk 18 stronger than demanded by the driver.
Moreover, the vehicle comprises rear brake lights 36 which are wirelessly activated by means of the electronic control unit 22 when the respective braking device 16 is actuated.
Moreover, a parking brake is integrated in the braking system 10. When the driver actuates a second control element in the form of a parking brake lever 38 or a switch a fourth signal 40 is wirelessly transmitted to the electronic control unit 22 which receives the fourth signal 40 wirelessly. Then, the respective control signal 24 is wirelessly transmitted to the respective braking device l6so as to activate the parking brake thereby preventing the vehicle from rolling. When the driver releases the parking brake lever 38 or said switch the parking brake is deactivated so that the vehicle can roll.
list of reference signs braking system 11 control element 12 brake pedal 14 foot first signal 16 braking device 18 brake disk brake caliper 22 electronic control unit 24 control signal 26 electronic control unit 28 second signal 29 signal detection unit 32 third signal 34 warning signal 36 brake light 38 parking brake lever fourth signal

Claims (6)

  1. SClaims A braking system (10) for a vehicle, the braking system (10) comprising: -at least one braking device (16) configured to brake at least one wheel of the vehicle; -at least one control element (11) configured to be actuated by the driver of the vehicle and wirelessly transmit at least one first signal (15) due to the actuation of the control element (11), the first signal (15) being indicative of a braking force for braking the vehicle; and -at least one electronic control unit (22) configured to wirelessly receive the first signal (15), generate at least one control signal (24) on the basis of the first signal (15), and transmit the control signal (24)to the braking device (16) configured to receive the control signal (24) thereby controlling the braking device (16) so as to brake the wheel by means of the braking device (16).
  2. 2. The braking system (10) according to claim 1, wherein the electronic control unit (22) is configured to wirelessly transmit the control signal (24)to the braking device (16) configured to wirelessly receive the control signal (24).
  3. 3. The braking device (10) according to claim 1 or 2, wherein the braking system (10) comprises at least one wheel speed sensor configured to detect a rotational speed of the wheel, provide a speed signal indicative of the detected rotational speed, and wirelessly transmit the speed signal to the electronic control unit (22) configured to wirelessly receive the speed signal.
  4. 4. The braking device (10) according to claim 3, wherein the electronic control unit (22) is configured to generate the control signal (24) on the basis of the first signal and the speed signal.
  5. 5. The braking device according to any one of the preceding claims, wherein the respective signal (15, 24) is wirelessly transmitted and received by means of radio-frequency identification technology or any other wireless based communication technology.
  6. 6. A vehicle having at least one braking system (10) according to any one of the preceding claims.
GB1511433.3A 2015-06-30 2015-06-30 Braking system for a vehicle, in particular a motor vehicle Withdrawn GB2530371A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1511433.3A GB2530371A (en) 2015-06-30 2015-06-30 Braking system for a vehicle, in particular a motor vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1511433.3A GB2530371A (en) 2015-06-30 2015-06-30 Braking system for a vehicle, in particular a motor vehicle

Publications (2)

Publication Number Publication Date
GB201511433D0 GB201511433D0 (en) 2015-08-12
GB2530371A true GB2530371A (en) 2016-03-23

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Family Applications (1)

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GB1511433.3A Withdrawn GB2530371A (en) 2015-06-30 2015-06-30 Braking system for a vehicle, in particular a motor vehicle

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110435615A (en) * 2019-07-26 2019-11-12 同济大学 A kind of wireless brake system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7084748B2 (en) * 2002-03-19 2006-08-01 Zf Friedrichshafen Ag Wireless communication in vehicles
CN201484612U (en) * 2009-08-07 2010-05-26 弘家金属工业股份有限公司 Brake system with wireless transmission
KR20110010314A (en) * 2009-07-24 2011-02-01 이남구 Wireless control system of brake and transmission gear for bicycle
CN104590311A (en) * 2014-12-09 2015-05-06 南车株洲电力机车有限公司 Railway locomotive braking system control device and method
US20150158470A1 (en) * 2013-12-10 2015-06-11 Hyundai Motor Company Remote control system and method for parking brake of vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7084748B2 (en) * 2002-03-19 2006-08-01 Zf Friedrichshafen Ag Wireless communication in vehicles
KR20110010314A (en) * 2009-07-24 2011-02-01 이남구 Wireless control system of brake and transmission gear for bicycle
CN201484612U (en) * 2009-08-07 2010-05-26 弘家金属工业股份有限公司 Brake system with wireless transmission
US20150158470A1 (en) * 2013-12-10 2015-06-11 Hyundai Motor Company Remote control system and method for parking brake of vehicle
CN104590311A (en) * 2014-12-09 2015-05-06 南车株洲电力机车有限公司 Railway locomotive braking system control device and method

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Publication number Publication date
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