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GB2521533A - Braking system for a vehicle, in particular a commercial vehicle - Google Patents

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

Info

Publication number
GB2521533A
GB2521533A GB1421595.8A GB201421595A GB2521533A GB 2521533 A GB2521533 A GB 2521533A GB 201421595 A GB201421595 A GB 201421595A GB 2521533 A GB2521533 A GB 2521533A
Authority
GB
United Kingdom
Prior art keywords
brake pad
vehicle
friction element
braking system
pad parts
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Withdrawn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
GB1421595.8A
Other versions
GB201421595D0 (en
Inventor
Sharath Kashyap
Kiran Ravindran
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 GB1421595.8A priority Critical patent/GB2521533A/en
Publication of GB201421595D0 publication Critical patent/GB201421595D0/en
Publication of GB2521533A publication Critical patent/GB2521533A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • 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
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/04—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting directly on tread
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H1/00—Applications or arrangements of brakes with a braking member or members co-operating with the periphery of the wheel rim, a drum, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D49/00—Brakes with a braking member co-operating with the periphery of a drum, wheel-rim, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D49/00—Brakes with a braking member co-operating with the periphery of a drum, wheel-rim, or the like
    • F16D49/16—Brakes with two brake-blocks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/06—Bands, shoes or pads; Pivots or supporting members therefor for externally-engaging brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/08—Bands, shoes or pads; Pivots or supporting members therefor for internally-engaging brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Braking Arrangements (AREA)

Abstract

A braking system 10, preferably for a commercial vehicle, comprises: at least one friction element configured to be rotationally fixed to a vehicle wheel 12; at least one actuator device 16 configured to move a brake pad device 14 into contact with the friction element; the brake pad device 14 having at least two separate brake pad parts 24, 26. The separate brake pad parts 24, 26 may be of different materials, preferably metallic and ceramic materials. The actuator 16 may exert different forces on the brake pad parts 24, 26, and may consist of separate actuators 32 & 34. The particles abraded of at least one brake pad parts 24, 26 may exceed 2.5 microns.

Description

Braking System for a Vehicle, in particular a Commercial Vehicle The invention relates to a braking system for a vehicle according to the preamble of patent claim 1.
Such braking systems for vehicles, in particular commercial vehicles, are well-known from the general prior art. Such a braking system comprises at one least friction element configured to be connected to at least one wheel of the vehicle in the rotationally fixed manner. Conventionally, said friction element is a brake disk or a brake drum which, in a completely assembled state of the vehicle, rotates together with the wheel when the vehicle is travelling.
The braking system further comprises at least one brake pad device configured to be mounted on a structure of the vehicle at least indirectly. For example, the brake pad device is connected to a wheel carrier in a rotationally fixed manner, the wheel carrier being configured to carry the wheel of the vehicle. In other words, in the completely assembled state of the vehicle, the wheel and the friction element are rotatably mounted on the wheel carrier so that the wheel and the friction element can rotate in relation to the wheel carrier and the brake pad device about a rotation axis when the vehicle is travelling.
Furthermore, the braking system comprises at least one actuator device configured to move the brake pad device into contact with the friction element so as to brake, i.e. decelerate the friction element and, thus, the wheel. Thereby, the wheel and, thus, the vehicle can be decelerated due to friction forces acting between the friction element and the brake pad device. Thus, the braking system is also referred to as a friction brake which usually is a service brake of the vehicle. JR 59077137 Al shows a friction pad.
When braking the vehicle by means of the braking system particles are abraded off the brake pad device due to the friction between the brake pad device and the friction element. Thus, wear and tear results from braking the vehicle.
It is therefore an object of the present invention to provide a braking system of the previously mentioned kind, in which braking system wear and tear can be kept particularly low.
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.
In order to provide a braking system of the kind indicated in the preamble of patent claim 1, in which braking system wear and tear can be kept particularly low according to the present invention the brake pad device comprises at least two separate brake pad parts.
Thereby, forces or a brake pressure to move the brake pad parts into contact with the friction element and hold the brake pad parts in contact with the friction element can be distributed among the brake pad parts so that loads acting upon the respective brake pad parts during braking can be kept particularly low in comparison with conventional braking systems in which the brake pad device is formed by a single brake pad. Since the brake pressure can be distributed over the separate brake pad parts wear and tear of the brake pad parts can be kept particularly low so that harmless debris and/or a lesser amount of debris is released from the brake pad device during braking. Thereby, wear and tear of the brake pad device as well as a pollution of the environment can be kept to a minimum.
Preferably, the brake pad parts are made of different materials which have, for example, different abrasion factors so that the amount of particles abraded off the brake pad parts can be kept particularly low.
In an advantageous embodiment of the invention the actuator device is configured to exert different forces for moving the respective brake pad parts into contact with the friction element on the brake pad parts. For example, the actuator device is configured to exert forces for moving the brake pad parts into contact with the friction element on the brake pad parts in such a way that the size of particles abraded off at least one of the brake pad parts due to the contact with the friction element exceeds 2.5 microns (pm).
Thereby, pollution of the environment can be kept particularly low since only harmless debris is released from the brake pad device during braking, the debris being capable of being filtered by a body's respiratory system.
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 respective indicated combination but also in any other combination or taken alone without leaving the scope of the invention.
The drawing shows in: Fig. 1 a schematic view of a braking system for a vehicle, the braking system comprising at least one brake pad device configured to be mounted on a structure of the vehicle at least indirectly and having at least two separate brake pad parts; and Fig. 2 a diagram illustrating the size of particles abraded off the brake pad device during braking in dependency on a brake pressure acting upon the brake pad device.
Fig. 1 shows a schematic view of a braking system 10 for a vehicle, in particular a commercial vehicle. The vehicle comprises a structure having a frame which is not shown in Fig. 1. Moreover, the vehicle, in particular the commercial vehicle, can comprise at least one body and a driver's cab which are mounted on the frame. Moreover, the vehicle comprises at least one front axle and at least one rear axle each of which is mounted on the frame. Each of the axles comprises at least two wheels via which the vehicle can roll on a surface during a journey. One of said wheels is shown in Fig. 1 and indicated by 12.
This means the wheel 12 is rotatably mounted on the frame so that the wheel 12 can rotate in relation to the frame about a rotation axis.
The braking system 10 comprises at least one friction element which is not shown in Fig. 1, the friction element being configured to be connected to the wheel 12 in a rotationally fixed manner. In other words, in a completely assembled state of the vehicle, the friction element is connected to the wheel 12 in a rotationally fixed manner so that, during a journey of the vehicle, the wheel 12 and the friction element rotate together about said rotation axis. For example, the friction element is a brake disk or a brake drum connected to the wheel 12 at least indirectly in a rotationally fixed manner.
Moreover, the braking system 10 comprises at least one brake pad device 14 configured to be mounted on the structure of the vehicle at least indirectly in a rotatably fixed manner. In other words, in the completely assembled state of the vehicle the braking pad device 14 is attached to the frame at least indirectly. Moreover, the braking pad device 14 is rotatably fixed with respect to the rotation axis. Thereby, the wheel 12 and the friction element rotate about the rotation axis in relation to the brake pad device 14 about the rotation axis when the vehicle is travelling.
The braking system 10 further comprises at least one actuator device 16 configured to move the brake pad device 14 into contact with the friction element and hold the brake pad device 14 in contact with the friction element so as to brake the friction element and, thus, the wheel l2so that the vehicle is decelerated. The braking system 10 further comprises an electronic control unit 18 which is also referred to as a braking control unit configured to control the actuator device 16 via a control logic 20. In Fig. 1, a directional arrow 22 illustrates the direction of forward movement of the vehicle.
For example, the actuator device 16 is a hydraulic actuator or a pneumatic actuator configured to exert a brake pressure and, thus, forces on the brake pad device l4so as to move the brake pad device 14 into contact with the friction element and hold the brake pad device 14 in contact with the friction element. The forces or brake pressure exerted on the brake pad device 14 and, via the brake pad device 14, on the friction element can be adjusted by the driver of the vehicle via an operation element such as a brake paddle configured to be actuated by the driver.
Moving the brake pad device 14 into contact with the friction element and holding the brake pad device 14 in contact with the friction element so as to decelerate the vehicle results in friction between the brake pad device 14 and the friction element. In order to keep wear and tear of the braking system 10 particularly low the brake pad device 14 comprises at least two separate brake pad parts 24 and 26. Thus, the brake pressure exerted on the brake pad device 14 by the actuator device 16 is distributed among the separate brake pad parts 24 and 26 so that forces and loads acting upon the brake pad parts 24 and 26 during braking can be kept particularly low. Thereby, the amount of particles abraded off the brake pad device 14 during braking can be kept particularly low and/or the size of the particles exceeds 2.5 microns (pm) so that pollution of the environment can be kept to a minimum.
Fig. 2 shows a diagram illustrating the relations between the brake pressure, the size of the particles and the velocity of the vehicle. The diagram has a first area 28 in which the size of the particles exceeds 2.5 pm (micrometers, pm). Moreover, the diagram has a second area 30 in which the size of the particles is below 2.5 pm. Since the brake pad device 14 comprises the two separate brake pad parts 24 and 26 the brake pad device 14, in particular the braking system 10 can be configured in such a way that the size of the particles abraded off at least one of the brake pad parts 24 and 26 exceeds 2.5 pm during braking. For example, the brake pad parts 24 and 26 are made of different materials. For example, the brake pad part 24 is made of a metallic material and the brake pad part 26 is made of a ceramic material.
Additionally or alternatively the actuator device 16 is configured to exert different forces.
i.e. different brake pressures for moving the respective brake pad parts 24 and 26 into contact with the friction element and hold the respective brake pad parts 24 and 26 in contact with the friction element on the brake pad parts 24 and 26. For example, the actuator device 16 comprises a first actuator 32 configured to move the corresponding brake pad part 24 into contact with the friction element and hold the brake pad part 24 in contact with the friction element. For example, the actuator device 16 comprises a second actuator 34 configured to move the corresponding brake pad pad 26 into contact with the friction element and hold the brake pad part 26 in contact with the friction element.
As can be seen from Fig. 1, the actuators 32 and 34 can be controlled by the electronic control unit 18 via the control logic 20. Preferably, the control logic 20 comprises the diagram shown in Fig. 2 so that the actuator device 16, in particular the actuators 32 and 34, are controlled by the control logic 20 on the basis of the diagram shown in Fig. 2. As can be seen from Fig. 2, preferably, the actuator device 16, i.e. the separate actuators 32 and 34 are controlled by the electronic control unit 18 in such a way on the basis of the velocity that the brake pressure applied to at least one of the brake pad parts 24 and 26 is in the area 28. Thus, the size of the particles exceeds 2.5 pm so that the particles can be filtered by a body's respiratory thereby keeping the pollution of the environment at a minimum. Moreover, wear and tear of the brake pad device 14 can be kept to a minimum which results in a particularly long life of the brake pad parts 24 and 26. Moreover, at least one of the brake pad parts 24 and 26 can be made of a particularly environmentally harmless material, wherein the other brake pad pad 24 or 26 can be made of a particularly cost-efficient material. However, since the brake pad device 14 comprises the two brake pad parts 24 and 26 and the actuator device 16 comprises the two separate actuators 32 and 34 an adequate braking performance can be realized.
List of reference signs braking system 12 wheel 14 brake pad device 16 actuatordevice 18 electronic control unit control logic 22 directional arrow 24 brake pad part 26 brake pad part 28 first area second area 32 actuator 34 actuator

Claims (6)

  1. Claims A braking system (10) for a vehicle, in particular a commercial vehicle, the braking system (10) comprising: -at least one friction element configured to be connected to at least one wheel (12) of the vehicle in a rotationally fixed manner; -at least one brake pad device (14) configured to be mounted on a structure of the vehicle at least indirectly; -at least one actuator device (16) configured to move the brake pad device (14) into contact with the friction element so as to brake the friction element; characterized in that the brake pad device (14) comprises at least two separate brake pad parts (24, 26).
  2. 2. The braking system (10) according to claim 1, characterized in that the brake pad parts (24, 26) are made of different materials.
  3. 3. The braking system (10) according to claim 2, characterized in that one of the brake pad parts (24, 26) is made of a metallic material and the other brake pad part (26) is made of a ceramic material.
  4. 4. The braking system (10) according to any one of the preceding claims, characterized in that the actuator device (16) is configured to exert different forces for moving the respective brake pad parts (24, 26) into contact with the friction element on the brake pad parts (24, 26).
  5. 5. The braking system (10) according to any one of the preceding claims, characterized in that the actuator device (16) comprises a first actuator (32) for moving one of the brake pad parts (24, 26), and a separate second actuator (34) for moving the other brake pad part (26).
  6. 6. The braking system (10) according to any one of the preceding claims, characterized in that the actuator device (16) is configured to exert forces for moving the brake pad parts (24, 26) into contact with the friction element on the brake pad parts (24, 26) in such a way that the size of particles abraded off at least one of the brake pad parts (24, 26) due to the contact with the friction element exceeds 2.5 microns.
GB1421595.8A 2014-12-04 2014-12-04 Braking system for a vehicle, in particular a commercial vehicle Withdrawn GB2521533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1421595.8A GB2521533A (en) 2014-12-04 2014-12-04 Braking system for a vehicle, in particular a commercial vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1421595.8A GB2521533A (en) 2014-12-04 2014-12-04 Braking system for a vehicle, in particular a commercial vehicle

Publications (2)

Publication Number Publication Date
GB201421595D0 GB201421595D0 (en) 2015-01-21
GB2521533A true GB2521533A (en) 2015-06-24

Family

ID=52425462

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1421595.8A Withdrawn GB2521533A (en) 2014-12-04 2014-12-04 Braking system for a vehicle, in particular a commercial vehicle

Country Status (1)

Country Link
GB (1) GB2521533A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106812837A (en) * 2016-12-27 2017-06-09 徐骏 A kind of aluminum matrix composite braking brake disk and preparation method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2355419A (en) * 1942-11-04 1944-08-08 Johns Manville Composite brake lining
JPS6226183A (en) * 1985-07-26 1987-02-04 本田技研工業株式会社 Brake caliper for motorcycle
US4907677A (en) * 1986-03-31 1990-03-13 Sumitomo Electric Industries, Ltd. Friction brake material with carbon and ferrous portions
DE4019792A1 (en) * 1990-06-21 1991-07-04 Daimler Benz Ag Disc brake for motor vehicle - has brake pads which are made from materials with different friction characteristics
FR2734875A1 (en) * 1995-06-01 1996-12-06 Usines Dehousse Braking pad for rail vehicle, having blocks with friction surfaces constituted from different materials
JP2009264506A (en) * 2008-04-25 2009-11-12 Nissin Kogyo Co Ltd Vehicular disc brake

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2355419A (en) * 1942-11-04 1944-08-08 Johns Manville Composite brake lining
JPS6226183A (en) * 1985-07-26 1987-02-04 本田技研工業株式会社 Brake caliper for motorcycle
US4907677A (en) * 1986-03-31 1990-03-13 Sumitomo Electric Industries, Ltd. Friction brake material with carbon and ferrous portions
DE4019792A1 (en) * 1990-06-21 1991-07-04 Daimler Benz Ag Disc brake for motor vehicle - has brake pads which are made from materials with different friction characteristics
FR2734875A1 (en) * 1995-06-01 1996-12-06 Usines Dehousse Braking pad for rail vehicle, having blocks with friction surfaces constituted from different materials
JP2009264506A (en) * 2008-04-25 2009-11-12 Nissin Kogyo Co Ltd Vehicular disc brake

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106812837A (en) * 2016-12-27 2017-06-09 徐骏 A kind of aluminum matrix composite braking brake disk and preparation method
CN106812837B (en) * 2016-12-27 2019-12-13 徐骏 Aluminum-based composite material brake disc and preparation method thereof

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