KR20150045047A - Caliper Drag Measuring Apparatus and the method thereof - Google Patents

Caliper Drag Measuring Apparatus and the method thereof Download PDF

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Publication number
KR20150045047A
KR20150045047A KR20130124134A KR20130124134A KR20150045047A KR 20150045047 A KR20150045047 A KR 20150045047A KR 20130124134 A KR20130124134 A KR 20130124134A KR 20130124134 A KR20130124134 A KR 20130124134A KR 20150045047 A KR20150045047 A KR 20150045047A
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KR
South Korea
Prior art keywords
pad
pair
sensor
carrier
caliper
Prior art date
Application number
KR20130124134A
Other languages
Korean (ko)
Inventor
공영훈
Original Assignee
주식회사 만도
하원용
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Publication date
Application filed by 주식회사 만도, 하원용 filed Critical 주식회사 만도
Priority to KR20130124134A priority Critical patent/KR20150045047A/en
Publication of KR20150045047A publication Critical patent/KR20150045047A/en

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    • 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
    • F16D65/09—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
    • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • F16D65/095—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
    • F16D65/38—Slack adjusters

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

Abstract

Disclosed are an apparatus and a method for measuring a drag on the caliper of a vehicle. According to an embodiment of the present invention, the apparatus comprises: a disc rotating with a wheel; a pair of pad plates having pads attached to the inner surface thereof and pressing the disc; a carrier installed to allow the pad plates to advance and retreat in the direction of the disc; and a sensor arranged on the carrier, and selectively touching the pad plates. The apparatus is capable of sensing a force generated when the sensor touches the pad plates during the driving of the vehicle, and is capable of calculating the torque value of the drag using the force and a distance from the center of the wheel to the sensor.

Description

Technical Field [0001] The present invention relates to a caliper drag measuring apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus and method for measuring a caliper drag of a vehicle, and more particularly, to a dynamic caliper drag measurement apparatus and method capable of measuring a caliper drag during running.

Most elements that interfere with driving in a vehicle are represented by drag (resistance). Drag refers to most driving loss such as air resistance, gradient of road, frictional resistance caused by machine such as engine and mission drive shaft, and caliper resistance caused by braking device. By reducing the drag components, the running performance of the vehicle can be effectively increased.

The caliper drag measurement method currently used is a static method that lifts the vehicle to the lift and then reads the torque value while rotating the wheel with a torque wrench.

When the torque value becomes large, the torque value should be accurately measured at the time of development of the brake system because excessive fuel consumption of the vehicle, premature wear of the friction material, and noise due to non-uniform wear occur.

In the conventional caliper drag measurement method, since the torque value is measured in the fixed equipment provided with the measuring device, it is difficult to measure the torque value according to various situations that may occur during actual running.

In addition, the torque value output from the measuring device is not a method of directly measuring the caliper drag, but it is a method of subtracting the drag torque value of the transmission and the wheel from the total torque value including both the drag and the wheel drag of the caliper drag except for the caliper drag, The process is also complicated and it is difficult to see the torque value of the caliper drag accurately.

The caliper drag measurement device and the measurement method of the vehicle according to the embodiment of the present invention are intended to enable the caliper drag to be measured not only directly but also when traveling.

According to an aspect of the invention, there is provided a vehicle comprising: a disk rotating with a wheel of a vehicle; A pair of pad plates to which a pad is attached on the inner surface to press the disc; A carrier having a pair of the pad plates movably installed in a direction of the disk; And a sensor unit provided on the carrier for sensing movement of the pad plate occurring during traveling.

The sensor plate may be provided in the slide groove and may be selectively contacted with a protrusion of the pad plate which moves in a traveling direction. The sensor plate may include a plurality of protrusions formed at both ends of the pad plate, have.

The sensor unit may be a load cell.

The sensor unit may be provided in front of the traveling direction.

The sensor unit may be provided in a pair so as to correspond to a pair of the pad plates.

According to another aspect of the present invention, there is provided a disk apparatus comprising: a disk rotating together with a wheel of a vehicle; a pair of pad plates having pads on the inner surface thereof for pressing the disks; And a sensor provided on the carrier and selectively in contact with the pad plate so as to sense a force generated when the pad plate and the sensor are in contact with each other while the vehicle is traveling and to measure the torque value of the caliper drag using the force and the distance from the center of the wheel to the sensor A method of measuring a caliper drag of a vehicle may be provided.

The caliper drag measurement apparatus and method of a vehicle according to the embodiment of the present invention can output the torque value of the caliper drag by using the movement of the pad plate generated during traveling, Caliper drag can be measured even while driving.

1 is an exploded view of a vehicle disk brake in which a caliper drag measurement apparatus according to an embodiment of the present invention is installed.
2 is a cross-sectional view of a vehicle disk brake equipped with a caliper drag measurement device according to an embodiment of the present invention.
3 is a plan view of a disc brake for a vehicle equipped with a caliper drag measurement apparatus according to an embodiment of the present invention.
4 is a graph comparing the torque values of the caliper drag measurement apparatus according to an embodiment of the present invention and the conventional measurement apparatus.
FIG. 5 is another graph comparing the torque values of the caliper drag measuring apparatus and the conventional measuring apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, the embodiments described below are provided as examples so that those skilled in the art will be able to fully understand the spirit of the present invention. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. Further, in order to clearly illustrate the present invention, parts not related to the description are omitted from the drawings, , Length, thickness, etc. may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

The caliper drag measurement apparatus according to the embodiment of the present invention is installed in the vehicle disk brake shown in Fig.

As shown in the figure, a vehicle disk brake is configured such that a part of both sides of a disk 1 rotating together with a wheel (not shown) is pressed by a pair of pad plates 20 and 30 to which pads 21 and 31 are attached, A carrier 40 fixedly mounted on the knuckle of the vehicle body, and a caliper housing 10 slidably coupled to the carrier 40. [

The caliper housing 10 is provided at its one side with a cylinder 11 and moves forward and backward in accordance with braking oil supplied from a master cylinder (not shown) in the cylinder 11, The piston 12 is pressed against the piston 12.

The other side of the caliper housing 10 is provided with a downwardly bent finger 13 so that the other pad plate 30 can press the disc 1 with the sliding movement of the caliper housing 10. [ The cylinder 11 may be provided with a seal (not shown) for preventing oil leakage between the piston 11 and the piston 12 and returning the piston 12 when the braking oil pressure is released.

At both ends of the caliper housing 10, guide rods 14 are respectively provided so that the caliper housing 10 is slidably engaged with the carrier 40. The caliper housing 10 is connected to the carrier 40 40).

The pad plates 20 and 30 have an inner pad plate 20 having an inner surface attached with a pad 21 and an outer surface contacting the front end of the piston 12 and a pad 31 attached to the inner surface, And an outer pad plate 30 arranged to be in contact with the fingering protrusion 13. The names of the inner pad plate and the outer pad plate may be mutually changed. The pad plates 20, 30 have rectangular projections 22, 32 on both side ends thereof.

The carrier 40 is provided at the bottom of the caliper housing 10 to prevent the pad plates 20 and 30 from coming off and to guide the sliding operation of the pad plates 20 and 30.

The carrier 40 also has slide grooves 42 corresponding to the projections 22 and 32 provided at both ends of the pair of pad plates 20 and 30. The slide grooves 42 are provided in a rectangular shape to support the pad plates 20 and 30 moving toward both sides of the disk.

A pad spring 50 may be provided between the carrier 40 and the pad plates 20 and 30. The pad spring 50 is formed by molding a thin steel plate having a predetermined elasticity. The pad spring 50 is formed so as to have a concavo-convex shape so as to correspond to the projections 22 and 32 of the pad plates 20 and 30 or the shape of the slide groove 42 of the carrier 40. The pad plates 20 and 30 are smoothly slid toward the disc 1 while being supported by the pad springs 50. At this time, the pad springs 50 move in the sliding direction of the pad plates 20 and 30 And buffers vibrations applied to the pad plates 20 and 30.

2 and 3, the caliper drag measurement apparatus according to the present embodiment is provided inside the slide groove 42 of the carrier so as to be in contact with the projections 22 and 32 of the pad plates 20 and 30 And a sensor unit 60 for detecting the temperature of the liquid.

2, the sensor unit 60 includes a sensor 61 provided inside the carrier 40 and a calculating device 63 electrically connected through the sensor 61 and the cable 62 do.

The sensor 61 uses a load cell that outputs an electric signal when a load (force) is received. The button gauge of the load cell is provided to protrude from the outer wall of the carrier 40. This is because there is a large difference between the force acting on the load cell during braking and the force acting on the load cell during running. Experimentally, the force generated during braking is about 100 times greater than the force generated during driving. Since the load cell covering a wide range is not only expensive but also has a large deviation from the result, in this embodiment, the load cell protrudes about 0.2 mm from the carrier surface so as to protect the load cell when a force exceeding a predetermined level is applied. When a force exceeding a certain range acts on the load cell, the protruding portions 22 and 32 of the pad plate and the outer wall of the carrier 40 are contacted to prevent the load cell from being excessively pressed.

Further, the sensors 61 are provided in a pair of right and left. This is because the caliper drag generated in the inner pad plate 20 and the outer pad plate 30 are different from each other. In the present embodiment, the torque values for the caliper drag of the two pad plates 20 and 30 are summed to output the final torque value.

The signal output from the sensor 61, for example, the load cell, is converted into an electrical signal and input to the computing device 63. In this embodiment, an ECU (not shown) of the vehicle performs a role of an associative device and outputs the caliper drag as a torque value.

The ECU calculates the final torque value in the following manner.

Torque = Pad F (Inner + Outer) x Radius x cos?

        Radius: Distance from the wheel center to the sensor

In addition, the sensor unit 60 is provided in front of the traveling direction of the vehicle indicated by the arrows in Figs. This is because the caliper drag is generated when the disc 1 rotating together with the wheel contacts the pads 21 and 31 and thereby the pad plates 20 and 30 move in the running direction so that the disc 1 is eventually driven by the pad plate 20 , 30 (the caliper drag) acts in the running direction (the right side of the drawing) in front of the disc.

FIG. 4 is a graph comparing the Dynamo Torque value measured using the caliper drag measurement device installed in the test site with the Brake Torque value measured through the caliper drag measurement device of the present embodiment installed in the actual vehicle.

In the graph, it can be seen that the conventional dynamo torque value of the vertical axis outputted when the caliper drag is set the same is almost the same as the brake torque value of the present embodiment. The horizontal axis represents the number of caliper drag settings.

 FIG. 5 is a time chart comparing the Dynamo Torque value measured using the caliper drag measurement device with the Brake Torque value measured through the caliper drag measurement device of the present embodiment with respect to time.

In the graph, red indicates the torque value of the inner pad plate 20, green indicates the torque value of the outer pad plate 30, and the sum of the torque values of the inner pad plate and the outer pad plate, Value.

As shown in the figure, the final torque value of the caliper drag measuring apparatus according to the present embodiment substantially coincides with the torque value of black indicating the torque value of the conventional caliper drag measurement equipment.

1 .. Disc
10. Caliper Housing
20. Inner pad plate
30. Outer pad plate
40 .. Carrier
50 .. Pad spring
60,

Claims (9)

A disk rotating with a wheel of the vehicle;
A pair of pad plates to which a pad is attached on the inner surface to press the disk;
A carrier having a pair of the pad plates movably installed in a direction of the disk;
And a sensor unit provided on the carrier for detecting movement of the pad plate during traveling. The method according to claim 1,
Wherein the pad plate includes projections at both side ends thereof,
Wherein the carrier has a slide groove corresponding to the projection,
Wherein the sensor unit is provided in the slide groove and selectively contacts a protrusion of the pad plate moving in a running direction. 3. The method of claim 2,
Wherein the sensor unit is a load cell. The method according to claim 1,
Wherein the sensor unit is provided in front of the traveling direction. 5. The method according to any one of claims 1 to 4,
Wherein the sensor unit is provided in a pair so as to correspond to a pair of the pad plates. A pair of pad plates having a pad on the inner surface thereof for pressing the disc, a carrier on which a pair of pad plates are installed so as to be movable forward and backward in the direction of the disc, Including a selectively contacting sensor,
Sensing force generated by contact between the pad plate and the sensor during traveling,
And calculating the torque value of the caliper drag using the force and the distance from the center of the wheel to the sensor. The method according to claim 6,
Wherein the pad plate includes projections at both side ends thereof,
Wherein the carrier has a slide groove corresponding to the projection,
Wherein the sensor is provided in the slide groove. The method according to claim 6,
Wherein the sensor is provided in front of the traveling direction. The method according to claim 6,
Wherein the sensors are provided in a pair so as to correspond to a pair of the pad plates.
KR20130124134A 2013-10-17 2013-10-17 Caliper Drag Measuring Apparatus and the method thereof KR20150045047A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600077944A1 (en) * 2016-07-25 2018-01-25 Itt Italia Srl DEVICE FOR DETECTION OF RESIDUAL BRAKING TORQUE IN A VEHICLE EQUIPPED WITH DISC BRAKES
US11519475B2 (en) 2019-09-06 2022-12-06 Itt Italia S.R.L. Vehicle brake pad and a production process thereof
US11661987B2 (en) 2015-09-17 2023-05-30 Itt Italia S.R.L. Sensor-equipped vehicle braking systems, devices, and methods
US11740145B2 (en) 2021-05-25 2023-08-29 Itt Italia S.R.L. Methods and devices for estimating residual torque between the braked and braking elements of a vehicle
US11767896B2 (en) 2013-04-17 2023-09-26 Itt Italia S.R.L. Vehicle braking systems and methods
US11794707B2 (en) 2016-03-03 2023-10-24 Itt Italia S.R.L. Antilock braking systems, devices, and methods using sensorized brake pads
US11828333B2 (en) 2015-09-17 2023-11-28 Itt Italia S.R.L. Hot runner detection and response systems, devices, and methods
US11933379B2 (en) 2015-05-28 2024-03-19 Itt Italia S.R.L. Smart braking devices, systems, and methods with resin features

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11767896B2 (en) 2013-04-17 2023-09-26 Itt Italia S.R.L. Vehicle braking systems and methods
US11933379B2 (en) 2015-05-28 2024-03-19 Itt Italia S.R.L. Smart braking devices, systems, and methods with resin features
US11661987B2 (en) 2015-09-17 2023-05-30 Itt Italia S.R.L. Sensor-equipped vehicle braking systems, devices, and methods
US11828333B2 (en) 2015-09-17 2023-11-28 Itt Italia S.R.L. Hot runner detection and response systems, devices, and methods
US11794707B2 (en) 2016-03-03 2023-10-24 Itt Italia S.R.L. Antilock braking systems, devices, and methods using sensorized brake pads
IT201600077944A1 (en) * 2016-07-25 2018-01-25 Itt Italia Srl DEVICE FOR DETECTION OF RESIDUAL BRAKING TORQUE IN A VEHICLE EQUIPPED WITH DISC BRAKES
WO2018019438A1 (en) * 2016-07-25 2018-02-01 Itt Italia S.R.L. Device for detecting the residual braking torque in a vehicle equipped with disc brakes
US10451130B2 (en) 2016-07-25 2019-10-22 Itt Italia S.R.L. Residual braking torque indication devices, systems, and methods
US11441629B2 (en) 2016-07-25 2022-09-13 Itt Italia S.R.L. Residual braking torque indication devices, systems, and methods
US11519475B2 (en) 2019-09-06 2022-12-06 Itt Italia S.R.L. Vehicle brake pad and a production process thereof
US11885386B2 (en) 2019-09-06 2024-01-30 Itt Italia S.R.L. Vehicle brake pad and a production process thereof
US11740145B2 (en) 2021-05-25 2023-08-29 Itt Italia S.R.L. Methods and devices for estimating residual torque between the braked and braking elements of a vehicle

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