CN202002608U - System for detecting wear of friction plate of electronic parking brake system - Google Patents
System for detecting wear of friction plate of electronic parking brake system Download PDFInfo
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- CN202002608U CN202002608U CN2011200986370U CN201120098637U CN202002608U CN 202002608 U CN202002608 U CN 202002608U CN 2011200986370 U CN2011200986370 U CN 2011200986370U CN 201120098637 U CN201120098637 U CN 201120098637U CN 202002608 U CN202002608 U CN 202002608U
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- friction disc
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- brake system
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- friction plate
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Abstract
The utility model discloses a system for detecting wear of a friction plate of an electronic parking brake system. The system for detecting wear of the friction plate of the electronic parking brake system comprises an electronic control unit (ECU), wherein a current sensor is arranged in the ECU; the current sensor is arranged in the ECU in an integration manner; the ECU is connected with a motor which is connected with a deceleration transmission mechanism; and the deceleration transmission mechanism is connected with a piston which is connected with the friction plate. The system can effectively solve the technical problems that the conventional technical scheme is complicated so as not to contribute to large-scale and efficient manufacturing, the manufacturing cost is high, the large-scale modification of conventional motorcycle type cannot be adapted, and the detection structure of the friction plate is inaccurate. Simultaneously, the wear degree of the friction plate is measured accurately and timely; the conventional motorcycle type is modified conveniently and easily; and the degree for large-scale assembly line work is high.
Description
Technical field
The utility model belongs to motor vehicles electronic brake system manufacturing technology field, and specifically, the utility model relates to a kind of detection system of electronic brake system friction disc wear.
Background technology
In motor vehicle braking systems manufacturing technology field, electronic brake system is widely used in the various vehicles, and as an important backup system on the motor vehicle, it has the effect that parking braking power and auxiliary braking are provided.Friction disc in the electronic brake system is one of most critical parts of vehicle safety travel, and the abrasion condition of friction disc is directly connected to the reliability of car brakeing, and the abrasion condition of in time understanding friction disc is particularly important.Safety except 100%, whenever driver and crew's expectation can both know the abrasion condition of friction disc.
At present, to the major part research of automobile friction is alarm to wear limit, though such as probe being installed on brake-shoe or the brake block, in friction disc, being imbedded method such as lead and give the alarm can be in the friction disc lifetime limitation time, the abrasion detection in the friction disc use and to transmit the research of information in real time to driver and crew actually rare.
In the prior art, record at the abrasion detection in the friction disc use, for example at Chinese patent ZL200710047396.5, patent name is " based on the disk brake friction wafer attrition rate detecting system of guided wave ", and open day is on March 5th, 2008; This patent has been put down in writing a kind of disk brake friction wafer attrition rate detecting system based on guided wave, make its guided wave driver in friction disc, motivate guided wave, in addition, utilize wave propagation time and guided wave driver and guided wave signal receiver to be received in the guided wave signal of propagating in the friction disc, utilize the distance of wave propagation time and guided wave driver and guided wave signal receiver to obtain the actual propagation speed in friction disc of guided wave, thereby obtain the thickness of friction disc, also be the degree of wear, whether the distortion characteristics of the guided wave signal that receives is used to detect has damage to exist in the friction disc.But in the actual production manufacturing and using, there is following technological deficiency in the prior art:
1, prior art scenario-frame complexity, and the parts installation site had relatively high expectations, be difficult for extensive high efficiency production manufacturing;
2, prior art scheme parts are many, and used parts are relatively more expensive, cause the manufacturing cost height;
3, the prior art scheme is transformed difficulty at existing vehicle, can't adapt on a large scale to having the improvement of vehicle now;
4, the prior art scheme is subjected to the restriction or the interference of external condition easily, causes the testing result of friction disc inaccurate.
The utility model content
The technical scheme that the utility model provides technical matters to be solved is that prior art scenario-frame complexity is difficult for extensive high efficiency production manufacturing; The manufacturing cost height; Can't adapt on a large scale to having the improvement of vehicle now; To technical matterss such as the detection architecture of friction disc are inaccurate, and a kind of simple in structure, low cost of manufacture is provided, be convenient to existing vehicle improve, to the testing result of the friction disc detection method of electronic brake system friction disc wear amount accurately.
Design of the present utility model is, utilize the electronics parking system voltage, electric current, the time that friction disc carries out in the clamping process to be changed in control executing mechanism, carry out logic contrast and judgement by electronic control unit (ECU), draw the degree of wear that detects friction disc, and according to this degree of wear in good time send warning.
Technical scheme provided by the utility model is, a kind of detection system of electronic brake system friction disc wear, comprise electronic control unit (ECU), be provided with current sensor in described electronic control unit, described current sensor is arranged in the described electronic control unit in integrated mode.
Described electronic control unit (ECU) connects motor, and motor connects reduction gearing mechanism, and reduction gearing mechanism connects piston, and piston connects friction disc.
Described vehicle electronics control module (ECU) receives the variable quantity of voltage, electric current and time that described topworks measures in the Parking process by circuit, according to the relation of friction disc decrement and described voltage and/or the variable quantity of electric current and/or time, detect the friction disc wear amount.
Described current sensor can detect the electric current changing value of electronics Parking topworks in clamping process in the Parking process.
The technical scheme that adopts the utility model to provide can effectively solve prior art scenario-frame complexity, is difficult for extensive high efficiency production manufacturing; The manufacturing cost height; Can't adapt on a large scale to having the improvement of vehicle now; To technical matterss such as the detection architecture of friction disc are inaccurate, simultaneously, the scheme that adopts the utility model to provide, to the degree measurement of friction disc wear accurately, in time; Conveniently and easily existing vehicle is improved large-scale pipeline operation degree height.
Description of drawings
In conjunction with the accompanying drawings, the utility model is described further:
Fig. 1 is (A) and the detected electric current of wearing and tearing back (B) Parking process, time-varying relationship synoptic diagram before the utility model friction disc wear;
Fig. 2 friction disc the n time that is the utility model in carrying out braking procedure and (n+1) detected electric current of inferior Parking process and clamping time the variation relation synoptic diagram;
Fig. 3 is the utility model friction disc (C) and the floor map of wearing and tearing backs (D) in piston promotion clamp Parking process when last state.
Fig. 4 is the utility model electronic brake system friction disc wear quantity measuring method system principle diagram;
Wherein, 1 is brake disc; 2 is friction disc; 3 is piston; 4 is reduction gearing mechanism; 5 is motor; 6 is electronic control unit; 7 is current sensor.
Embodiment
Technical scheme provided by the utility model is, a kind of detection system of electronic brake system friction disc wear, comprise electronic control unit 6 (ECU), be provided with current sensor 7 in described electronic control unit, described current sensor 7 is arranged in the described electronic control unit in integrated mode.Described electronic control unit 6 (ECU) connects motor 5, and motor 5 connects reduction gearing mechanism 4, and reduction gearing mechanism 4 connects piston 3, and piston 3 connects friction disc 2.Described vehicle electronics control module (6) (ECU) receives the variable quantity of voltage, electric current and time that described topworks measures in the Parking process by circuit, according to the relation of friction disc (2) decrement and described voltage and/or the variable quantity of electric current and/or time, detect the friction disc wear amount.Described current sensor 7 can detect the electric current changing value of electronics Parking topworks in clamping process in the Parking process.
A kind of detection system of electronic brake system friction disc wear, the detection method step is as follows:
The first step is braked vehicle by electronic brake system, and control executing mechanism clamps friction disc 2;
In second step, vehicle electronics control module 6 (ECU) detects the variable quantity of voltage, electric current and the time of control executing mechanism clamping process;
In the 3rd step, the above-mentioned variable quantity that described vehicle electronics control module 6 (ECU) will obtain draws the wear extent that detects friction disc 2 by logic determines.
Described vehicle electronics control module 6 (ECU) is being measured described topworks measures voltage, electric current and time in the Parking process variable quantity, according to the relation of friction disc 2 decrements and described voltage and/or the variable quantity of electric current and/or time, detect the friction disc wear amount.
The elastic deformation of mechanical part takes place in described friction disc 2 in the braking clamping process, according to the Conversion of energy law, following variation is arranged in the process that motor 5 voltage and currents driving topworks clamps:
F
c＝λ·Δx
Formula (I)
Wherein, when clamp finishing, can think the kinetic energy E that is converted into
kWith heat energy E
hBeing approximately 0 ignores.E
xBe the elastic potential energy that friction disc wear produces, λ is an elasticity coefficient, and Δ x is a decrement, and U is motor 5 voltages, and I is motor 5 electric currents.When clamping process finishes, E
k=0, F
cBe clamping force.η is an energy conversion efficiency.Then have:
Under the situation that clamping force is determined, can do following estimation:
Wherein, the constant coefficient of k for determining by test.
Can draw decrement Δ x value by asking for to voltage, current integration;
The Δ x of described friction disc 2 when new state is available greatest wear value, and after wearing and tearing occurred, Δ x reduced gradually, equaled the available ultimate value Δ x that demarcates by test as Δ x
MinThe time, promptly report to the police, and can in real time abrasion condition be passed to driver and crew by the state output circuit of described vehicle electronics control module 6 (ECU).
Described vehicle electronics control module 6 (ECU) detects the wear extent of friction disc 2 by measuring the variable quantity of the clamping time that the per twice Parking process measurement of described topworks arrive according to the accumulated value of friction disc 2 decrements.
Between per twice Parking process, all can produce wearing and tearing at automobile according to friction disc 2, described vehicle electronics control module 6 (ECU) is measured the used time that each Parking process electric current changes, by calculating friction disc 2 decrements, and compare with the Parking process of going forward, these differences are added up, draw accumulated value; According to the abrasion condition of described accumulated value detection friction disc 2, when accumulated value reaches friction disc 2 decrement maximal value Δ x
MaxThe time, promptly report to the police, and abrasion condition is passed to driver and crew in real time by the state output circuit of described vehicle electronics control module 6 (ECU).
In actual test process, can be respectively T by current sensor integrated in the electronics Parking controller 7 measurements the n time and (n+1) inferior clamping time
nAnd T
(n+1), calculate friction disc 2 decrements by pre-designed control algolithm and be respectively Δ x (n) and Δ x (n+1).Per twice Parking process friction disc 2 decrement Δ x add up and represent with sum, then
sum＝∑[Δx(n+1)-Δx(n)]，n＝1，2，3，Λ
The situation of the change-detection friction disc wear by measuring sum is when sum reaches Δ x
MaxThe time, promptly report to the police.
Described vehicle electronics control module 6 (ECU) begins Parking to the variation of the used time that Parking finishes, according to the wear extent of described time change-detection friction disc 2 by measuring Parking topworks piston 3 from position, the end.
A kind of detection method of electronic brake system friction disc wear, step is as follows:
The first step, described friction disc 2 at level road shangguan close point fire switch, are independently controlled left and right sides clamp then after vehicle whenever travels above 1,000 kilometers;
Second step earlier was discharged into the end with left clamp, measured topworks's used time in the Parking process, then right clamp was discharged into the end, measured topworks's used time in the Parking process;
The 3rd step compared measured value and the friction disc 2 used time when the new state, was expressed as the friction disc wear situation according to its mistiming, and 2 decrement Δ x reach Δ x when friction disc
MaxThe time, promptly report to the police, and the friction disc wear situation is passed to driver and crew in real time by the state output circuit of described vehicle electronics control module 6 (ECU).
Specifically, the utility model begins Parking to the variation of the used time that Parking finishes by measuring Parking topworks piston 3 from position, the end, detect the abrasion condition of friction disc 2.Whenever travel surpass 1,000 kilometers after, at level road shangguan close point fire switch, independent then control left and right sides clamp.Earlier left clamp are discharged into the end, measure the used time t of topworks in the Parking process by control algolithm pre-designed in the electronic brake system controller
2, then right clamp are discharged into the end, measuring topworks is another t the used time in the Parking process
2Value.Used time t with measured value and friction disc 2 when complete
1Compare, according to t
2To t
1Change-detection friction disc 2 decrements, 2 decrement Δ x reach Δ x when friction disc
MaxThe time, promptly report to the police, and abrasion condition is passed to driver and crew in real time by the state output circuit of electronic brake system controller.
Be provided with current sensor 7 in the described vehicle electronics control module 6 (ECU), described current sensor 7 is measured the current change quantity of described topworks in clamping process.
1-4 is described further the utility model in conjunction with the accompanying drawings, and as shown in Figure 1, horizontal ordinate is represented is current rise time that measures in the Parking process, and what ordinate was represented is that detected electric current changes in the Parking process.Measuring the current rise time of measuring by current sensor integrated in the electronics Parking controller 7 before each braking clamping process friction disc wear is t
1, be t the current rise time of measuring behind friction disc wear
2According to formula
Wherein Δ x is a decrement, and U is motor 5 voltages, and I is motor 5 electric currents, the constant coefficient of k for determining by test.After calculating estimation, when friction disc 2 decrement Δ x equal by testing the ultimate value Δ x of demarcation
MinThe time, promptly report to the police, and the electronic brake system controller passes to driver and crew by the state output circuit in real time with abrasion condition.
As shown in Figure 2, horizontal ordinate is represented is clamping time that measures in the Parking process, and what ordinate was represented is that detected electric current changes in the Parking process.What two curves were represented respectively among the figure is the n time and detected clamping electric current of (n+1) inferior Parking process and the graph of a relation of clamping time, measures the n time and (n+1) inferior clamping time is respectively T by current sensor integrated in the electronics Parking controller 7
nAnd T
(n+1), be respectively Δ x (n) and Δ x (n+1) by calculating friction disc 2 decrements.Per twice Parking process friction disc 2 decrement Δ x add up and represent with sum, then
sum＝∑[Δx(n+1)-Δx(n)]，n＝1，2，3，Λ
The situation of the change-detection friction disc wear by measuring sum is when sum reaches Δ x
MaxThe time, promptly report to the police, and by the state output circuit abrasion condition is passed to driver and crew in real time by the electronic brake system controller.
As shown in Figure 3, when described topworks carries out in the friction disc 2 clamp operation processes, piston 3 drives friction discs 2 reaches, abuts on the brake disc 1, clamps gradually.After vehicle whenever travels and surpasses 1,000 kilometers, at level road shangguan close point fire switch, independent then control left and right sides clamp.Earlier left clamp are discharged into the end, measure the used time t in the Parking process of topworks
2, then right clamp are discharged into the end, measuring topworks is another t the used time in the Parking process
2Value.The used time of this process when friction disc 2 is complete is t
1, according to t
2To t
1Change-detection friction disc 2 decrements, and it is passed to the electronic brake system controller, 2 decrement Δ x reach Δ x when friction disc
MaxThe time by the state output circuit abrasion condition is passed to driver and crew in real time.
As shown in Figure 4, it is the system principle diagram of electronic brake system friction disc wear quantity measuring method, and electronic control unit 6 (ECU) can detect the electric current variation of electronics Parking topworks in clamping process in the Parking process by its integrated current sensor 7.Concrete structure circuit is connected to, and is provided with current sensor 7 in the electronic control unit 6 (ECU), and described electronic control unit 6 (ECU) connects motor 5, and motor 5 connects reduction gearing mechanism 4, and reduction gearing mechanism 4 connects piston 3, and piston 3 connects friction disc 2.
Above embodiment is only unrestricted in order to explanation the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the utility model, and not breaking away from spirit and scope of the present utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (4)
1. the detection system of an electronic brake system friction disc wear, comprise that electronic control unit (6) (ECU) is characterized in that, be provided with current sensor (7) in described electronic control unit, described current sensor (7) is arranged in the described electronic control unit in integrated mode.
2. the detection system of a kind of electronic brake system friction disc wear according to claim 1, it is characterized in that, described electronic control unit (6) (ECU) connects motor (5), motor (5) connects reduction gearing mechanism (4), reduction gearing mechanism (4) connects piston (3), and piston (3) connects friction disc (2).
3. the detection system of a kind of electronic brake system friction disc wear according to claim 1 and 2, it is characterized in that, described vehicle electronics control module (6) (ECU) receives the variable quantity of voltage, electric current and time that described topworks measures in the Parking process by circuit, according to the relation of friction disc (2) decrement and described voltage and/or the variable quantity of electric current and/or time, detect the friction disc wear amount.
4. the detection system of a kind of electronic brake system friction disc wear according to claim 3 is characterized in that, described current sensor (7) can detect the electric current changing value of electronics Parking topworks in clamping process in the Parking process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200986370U CN202002608U (en) | 2011-04-07 | 2011-04-07 | System for detecting wear of friction plate of electronic parking brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200986370U CN202002608U (en) | 2011-04-07 | 2011-04-07 | System for detecting wear of friction plate of electronic parking brake system |
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| Publication Number | Publication Date |
|---|---|
| CN202002608U true CN202002608U (en) | 2011-10-05 |
Family
ID=44705345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200986370U Expired - Fee Related CN202002608U (en) | 2011-04-07 | 2011-04-07 | System for detecting wear of friction plate of electronic parking brake system |
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| CN (1) | CN202002608U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110032084A (en) * | 2019-03-22 | 2019-07-19 | 中国第一汽车股份有限公司 | A kind of emulation and test method of electronic parking system function mode |
| CN110578764A (en) * | 2019-08-22 | 2019-12-17 | 上海大陆汽车制动***销售有限公司 | Software type electronic brake caliper friction plate abrasion alarm system and method |
| CN112326263A (en) * | 2020-10-28 | 2021-02-05 | 江苏徐工工程机械研究院有限公司 | Wet brake life estimation system and method |
-
2011
- 2011-04-07 CN CN2011200986370U patent/CN202002608U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110032084A (en) * | 2019-03-22 | 2019-07-19 | 中国第一汽车股份有限公司 | A kind of emulation and test method of electronic parking system function mode |
| CN110032084B (en) * | 2019-03-22 | 2021-11-19 | 中国第一汽车股份有限公司 | Simulation and test method for functional mode of electronic parking system |
| CN110578764A (en) * | 2019-08-22 | 2019-12-17 | 上海大陆汽车制动***销售有限公司 | Software type electronic brake caliper friction plate abrasion alarm system and method |
| CN112326263A (en) * | 2020-10-28 | 2021-02-05 | 江苏徐工工程机械研究院有限公司 | Wet brake life estimation system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20130407 |