CN102923111A - Electrical park brake (EPB) for vehicles and control method - Google Patents
Electrical park brake (EPB) for vehicles and control method Download PDFInfo
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- CN102923111A CN102923111A CN2012104338126A CN201210433812A CN102923111A CN 102923111 A CN102923111 A CN 102923111A CN 2012104338126 A CN2012104338126 A CN 2012104338126A CN 201210433812 A CN201210433812 A CN 201210433812A CN 102923111 A CN102923111 A CN 102923111A
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- parking
- control unit
- gripping power
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- actuating unit
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Abstract
The invention discloses an EPB for vehicles and a control method. The EPB comprises an electrical park control unit and a park actuating mechanism which are communicated, wherein the electrical park control unit comprises a tilt sensor and a current detection device and is connected with an ignition signal, a park switching signal and a gear signal respectively; and the current detection device comprises a current sensor, and the electrical park control unit calculates the park clamping force through the detected current. According to the technical scheme, the mechanical life of the park actuating mechanism can be prolonged, noise in a parking process of a vehicle can be reduced, and fuel consumption can be reduced; and simultaneously, the production cost is low, the safety, stability and reliability are high, and the like.
Description
Technical field
The invention belongs to vehicle electronic emergency brake system manufacturing technology field, specifically, relate to a kind of vehicle electronic emergency brake system and control method.Vehicle in this patent includes but not limited to automobile, motor vehicle driven by mixed power, pure electric vehicle etc.
Background technology
At present, in motor vehicle braking system manufacturing technology field, more and more extensive for the utilization of machinery control electronization, electronic brake system also more and more appears in the customer visual field.Electronic brake system (EPB:Electrical Park Brake) refers to the provisional braking in the driving process and the long time property braking function after stopping combines, and is realized the technology of stopping brake by electronic control mode.
Electronic brake system can be calculated vehicle on the slope because then the sliding force that gravity produces comes the balance sliding force by trailing wheel being applied braking force by its control system, and vehicle can be stopped on the slope.When vehicle start, obtain the signal of the size of displacement pickup on the pedal of clutch and throttle by control system and calculate the braking force that need to apply, know simultaneously the size of engine traction by high-speed CAN and engine computer communication.The increase of the automatic calculation engine tractive force of computer reduces braking force accordingly.When tractive force enough overcomes sliding force, computer drive motor brake off, thus realize the smooth and easy starting of vehicle.
In the prior art, vehicle electronic emergency brake system technology is in Rapid development stage, but a lot of aspect Shortcomings part also.Vehicle electronic emergency brake system of the prior art, when vehicle needs Parking, electronic parking control unit control Parking this moment actuating unit applies fixing Parking gripping power Parking (this gripping power is invariable), and the gripping power size of the implementing maxim that requires of car load normally, can safe Parking on than steep gradient to guarantee vehicle.There are many technical matterss in the prior art:
1, because electronic brake system of the prior art applies maximum fixing Parking gripping power for a long time, and to guarantee that this gripping power is invariable, cause greatly shorten the service life of Parking actuating unit.
2, because electronic brake system of the prior art applies maximum fixing Parking gripping power for a long time, and to guarantee that this gripping power is invariable, the oil consumption of car load is increased greatly, cause very large waste, be unfavorable for energy-conserving and environment-protective.
3, because electronic brake system of the prior art applies maximum fixing Parking gripping power for a long time, and to guarantee that this gripping power is invariable, so that in the Parking process, produced the noise that is difficult to improve, cause noise pollution.
Summary of the invention
Technical matters to be solved by this invention is, vehicle electronic emergency brake system of the prior art, when vehicle in the Parking process, electronic parking control unit control Parking actuating unit applies fixing Parking gripping power Parking (this gripping power is invariable), causes greatly shorten the service life of Parking actuating unit; The oil consumption of car load is increased greatly, cause very large waste, be unfavorable for energy-conserving and environment-protective; So that in the Parking process, produced the noise that is difficult to improve, cause the technical matterss such as noise pollution, and a kind of vehicle electronic emergency brake system and control method are provided.
Technical conceive of the present invention is, through to the prior art analysis as can be known, during Parking, needed Parking gripping power is different to vehicle on the ramp that the gradient varies in size, and the Parking actuating unit can apply the Parking gripping power that varies in size and carry out Parking.Concrete design is, the invention provides a kind of vehicle electronic emergency brake system and control method, to the vehicle that has been equipped with electronic brake system when the Parking, the electronic parking control unit detects the obliquity sensor signal, analyze the gradient size of judging the residing physical features of vehicle, calculate the needed Parking gripping power of vehicle Parking on this ramp, control Parking actuating unit carries out Parking by predetermined Parking gripping power.
Technical scheme provided by the present invention is, a kind of vehicle electronic emergency brake system control method comprises electronic parking control unit, obliquity sensor, Parking actuating unit,
The first step, described electronic parking control unit detects ignition signal, parking switch signal, gear signal;
Second step, described electronic parking control unit detects the obliquity sensor signal;
In the 3rd step, described electronic parking control unit calculates the corresponding gripping power of described Parking actuating unit according to the obliquity sensor signal;
In the 4th step, described electronic parking control unit sends instruction to described Parking actuating unit;
In the 5th step, described Parking actuating unit begins action, and brake disc is applied the described corresponding gripping power that calculates;
In the 6th step, when reaching described corresponding gripping power, described Parking actuating unit keeps this gripping power.
Described electronic parking control unit detects the obliquity sensor signal, calculates the gradient size of the residing physical features of vehicle.
Described electronic parking control unit compares the sizes values of the described gradient and the calibration value of experiment, calculates the Parking gripping power corresponding with this ratio of slope, the Parking of control Parking actuating unit.
Described Parking actuating unit comprises motor, described electronic parking control unit detects the size of the Parking gripping power that described Parking actuating unit applies by sensor, and when the Parking gripping power reached required value, the control motor stopped, otherwise, continue to apply the Parking gripping power.
Described sensor is for detecting the current sensor of current of electric, and described electronic parking control unit calculates the size of Parking gripping power by the size of current that detects.
Described motor comprises hollow travel stage and clamping stage, described hollow travel stage and described clamping stage are successive, begin to increase with the increase of the electric current of motor at described clamping stage Parking gripping power, when Parking gripping power during to required value, motor stops operating, the electric current vanishing, Parking is finished.
A kind of vehicle electronic emergency brake system comprises electronic parking control unit and Parking actuating unit, and described electronic parking control unit is connected with described Parking actuating unit, and described electronic parking control unit comprises obliquity sensor and current sensing means.
Described electronic parking control unit links to each other with ignition signal, parking switch signal, gear signal respectively; Described current sensing means comprises current sensor, and described electronic parking control unit calculates the size of Parking gripping power by the size of current that detects.
Described electronic parking control unit detects the obliquity sensor signal, calculates the gradient size of the residing physical features of vehicle.
Described electronic parking control unit compares the sizes values of the described gradient and the calibration value of experiment, calculates the Parking gripping power corresponding with this ratio of slope, the Parking of control Parking actuating unit; Described Parking actuating unit comprises motor, described electronic parking control unit detects the size of the Parking gripping power that described Parking actuating unit applies by sensor, and when the Parking gripping power reached required value, the control motor stopped, otherwise, continue to apply the Parking gripping power.
Adopt technical scheme provided by the present invention, can effectively solve vehicle electronic emergency brake system of the prior art, when vehicle in the Parking process, electronic parking control unit control Parking actuating unit applies fixing Parking gripping power Parking (this gripping power is invariable), causes greatly shorten the service life of Parking actuating unit; The oil consumption of car load is increased greatly, cause very large waste, be unfavorable for energy-conserving and environment-protective; So that in the Parking process, produced the noise that is difficult to improve, cause the technical matterss such as noise pollution, simultaneously, technical scheme provided by the present invention, when vehicle during in Parking, electronic brake system is big or small by the gradient that obliquity sensor detects vehicle physical features of living in, and through calculation process, control Parking actuating unit applies predetermined Parking gripping power and carries out Parking.Technical scheme provided by the present invention both can prolong mechanical life of Parking actuating unit, can improve again noise in the vehicle Parking process, reduce oil consumption; Also has simultaneously low cost of manufacture, the characteristics such as security and stability is high, reliability is strong.
Description of drawings
By reference to the accompanying drawings, the present invention is further illustrated:
Fig. 1 is structural representation of the present invention;
Fig. 2 vehicle of the present invention ramp of living in gradient size and Parking gripping power corresponding relation scheme drawing;
The corresponding relation figure signal of Fig. 3 size of current of the present invention and Parking gripping power;
Fig. 4 control flow chart of the present invention;
Wherein, 1 is the electronic parking control unit; 2 are the Parking actuating unit; 3 is obliquity sensor; 4 is current sensing means; 5 is ignition signal; 6 is the parking switch signal; 7 is gear signal.
The specific embodiment
A kind of vehicle electronic emergency brake system control method provided by the present invention, comprise electronic parking control unit 1, obliquity sensor 3, Parking actuating unit 2, the first step, described electronic parking control unit 1 detects ignition signal 5, parking switch signal 6, gear signal 7; Second step, described electronic parking control unit 1 detects obliquity sensor 3 signals; In the 3rd step, described electronic parking control unit 1 is according to obliquity sensor 3 signals, calculates the corresponding gripping power of described Parking actuating unit 2; In the 4th step, described electronic parking control unit 1 sends instruction to described Parking actuating unit 2; In the 5th step, described Parking actuating unit 2 begins action, and brake disc is applied the described corresponding gripping power that calculates.In the 6th step, when reaching described corresponding gripping power, described Parking actuating unit 2 keeps this gripping power.Described electronic parking control unit 1 detects obliquity sensor 3 signals, calculates the gradient size of the residing physical features of vehicle.Described electronic parking control unit 1 compares the sizes values of the described gradient and the calibration value of experiment, calculates the Parking gripping power corresponding with this ratio of slope, 2 Parkings of control Parking actuating unit.Described Parking actuating unit 2 comprises motor, described electronic parking control unit 1 detects the size of the Parking gripping power that described Parking actuating unit 2 applies by sensor, and when the Parking gripping power reached required value, the control motor stopped, otherwise, continue to apply the Parking gripping power.Described sensor is for detecting the current sensor of current of electric, and described electronic parking control unit 1 calculates the size of Parking gripping power by the size of current that detects.Described motor comprises hollow travel stage and clamping stage, described hollow travel stage and described clamping stage are successive, begin to increase with the increase of the electric current of motor at described clamping stage Parking gripping power, when Parking gripping power during to required value, motor stops operating, the electric current vanishing, Parking is finished.
A kind of vehicle electronic emergency brake system, comprise electronic parking control unit 1 and Parking actuating unit 2, described electronic parking control unit 1 is connected with described Parking actuating unit 2, is provided with obliquity sensor 3 and current sensing means 4 in the described electronic parking control unit 1.Described electronic parking control unit 1 links to each other with ignition signal 5, parking switch signal 6, gear signal 7 respectively; Described current sensing means 4 comprises current sensor, and described electronic parking control unit 1 calculates the size of Parking gripping power by the size of current that detects.Described electronic parking control unit 1 detects obliquity sensor 3 signals, calculates the gradient size of the residing physical features of vehicle.Described electronic parking control unit 1 compares the sizes values of the described gradient and the calibration value of experiment, calculates the Parking gripping power corresponding with this ratio of slope, 2 Parkings of control Parking actuating unit; Described Parking actuating unit 2 comprises motor, described electronic parking control unit 1 detects the size of the Parking gripping power that described Parking actuating unit 2 applies by sensor, and when the Parking gripping power reached required value, the control motor stopped, otherwise, continue to apply the Parking gripping power.
The present invention be for the vehicle that has been equipped with electronic brake system when the Parking, electronic parking control unit 1 detects obliquity sensor 3 signals, calculate the gradient size of the residing physical features of vehicle, control Parking actuating unit 2 applies corresponding Parking gripping power and carries out Parking.
The present invention overcomes the fixedly defective of Parking clamping force control mode of in the past electronic brake system employing, to improve the performance of electronic brake system.The electronic brake system Parking control method that the present invention relates to mainly comprises the following aspects:
1, detects obliquity sensor 3 signals, calculate the gradient size of the residing physical features of vehicle.
2, electronic parking control unit 1 compares the sizes values of this gradient and the calibration value of experiment, calculates the Parking gripping power corresponding with this ratio of slope, controls Parking actuating unit 2 and carries out Parking with predetermined Parking gripping power.
3, electronic parking control unit 1 detects the size of the Parking gripping power that Parking actuating unit 2 applies by sensor, and when the Parking gripping power reached required value, the control motor stopped.
The value of obliquity sensor 3 when demarcating by experiment vehicle and being positioned on the ramp that the gradient varies in size, and the Parking gripping power corresponding with the gradient.
Fig. 1 is the system architecture diagram of the designed a kind of electronic brake system of the present invention and Parking control method.Electronic brake system is comprised of electronic parking control unit 1 and Parking actuating unit 2, wherein electronic control unit 1 is integrated obliquity sensor 3 and current sensing means 4.Obliquity sensor 3 is for detection of the size of the vehicle ramp of living in gradient, and this signal is passed to treater.Current sensing means 4 is for detection of the running current of motor in the Parking actuating unit 2, and the electronic parking control unit is known the Parking gripping power of Parking actuating unit by this signal.The Parking signal derives from ignition signal 5, parking switch 6, gear signal 7.
Fig. 2 is vehicle body of the present invention physical features gradient size of living in and Parking gripping power corresponding relation figure.Transverse axis is gradient size among the figure, and the longitudinal axis is Parking gripping power size.The present invention is divided into several scopes (as shown being three scopes) with the gradient, applies different Parking gripping powers in different gradient scopes.
Fig. 3 is the corresponding relation figure of current of electric size of the present invention and Parking gripping power.Motor is through starting process, at t
1After enter hollow travel stage, t
2The Parking gripping power begins to increase with the increase of the electric current of motor constantly, and when Parking gripping power during to required value, motor stops operating, the electric current vanishing, and Parking is finished.
The control flow chart of a kind of electronic brake system Parking control method that Fig. 4 designs for the present invention.After the Parking signal produced, electronic parking control unit 1 execution in step S1 gathered obliquity sensor signal 3.Step S2 after electronic parking control unit 1 gathers obliquity sensor signal 3, compares obliquity sensor signal 3 and experimental calibration value, calculates the gradient size of the residing physical features of vehicle.Then execution in step S3, electronic parking control unit 1 calculates vehicle needed Parking gripping power on this ramp according to the result of previous step.Next enter step S4, control Parking actuating unit 2 carries out Parking.And then in step S5, electronic parking control unit 1 judges by the motor operating current that detects the Parking actuating unit whether the Parking gripping power has reached required value.If reach required value, then finish this process; If no, then continue to judge, until reach required value.
Above embodiment is only unrestricted in order to the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, the present invention is made amendment or is equal to replacement, and not breaking away from the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. vehicle electronic emergency brake system control method, it is characterized in that, comprise electronic parking control unit (1), obliquity sensor (3), Parking actuating unit (2), described electronic parking control unit (1) carries out Parking control as follows:
The first step, described electronic parking control unit (1) detects ignition signal (5), parking switch signal (6), gear signal (7);
Second step, described electronic parking control unit (1) detects obliquity sensor (3) signal;
In the 3rd step, described electronic parking control unit (1) calculates the corresponding gripping power of described Parking actuating unit (2) according to obliquity sensor (3) signal;
In the 4th step, described electronic parking control unit (1) sends instruction to described Parking actuating unit (2);
In the 5th step, described Parking actuating unit (2) begins action, and brake disc is applied the described corresponding gripping power that calculates;
In the 6th step, when reaching described corresponding gripping power, described Parking actuating unit (2) keeps this gripping power.
2. a kind of vehicle electronic emergency brake system control method according to claim 1 is characterized in that, described electronic parking control unit (1) detects obliquity sensor (3) signal, calculates the gradient size of the residing physical features of vehicle.
3. a kind of vehicle electronic emergency brake system control method according to claim 1 and 2, it is characterized in that, described electronic parking control unit (1) compares the sizes values of the described gradient and the calibration value of experiment, calculate the Parking gripping power corresponding with this ratio of slope, the Parking of control Parking actuating unit (2).
4. a kind of vehicle electronic emergency brake system control method according to claim 3, it is characterized in that, described Parking actuating unit (2) comprises motor, described electronic parking control unit (1) detects the size of the Parking gripping power that described Parking actuating unit (2) applies by sensor, when the Parking gripping power reaches required value, the control motor stops, otherwise, continue to apply the Parking gripping power.
5. a kind of vehicle electronic emergency brake system control method according to claim 4, it is characterized in that, described sensor is for detecting the current sensor of current of electric, and described electronic parking control unit (1) calculates the size of Parking gripping power by the size of current that detects.
6. according to claim 4 or 5 described a kind of vehicle electronic emergency brake system control methods, it is characterized in that, described motor comprises hollow travel stage and clamping stage, described hollow travel stage and described clamping stage are successive, begin to increase with the increase of the electric current of motor at described clamping stage Parking gripping power, when Parking gripping power during to required value, motor stops operating, the electric current vanishing, Parking is finished.
7. vehicle electronic emergency brake system, comprise electronic parking control unit (1) and Parking actuating unit (2), it is characterized in that, described electronic parking control unit (1) is connected with described Parking actuating unit (2), and described electronic parking control unit (1) comprises obliquity sensor (3) and current sensing means (4).
8. a kind of vehicle electronic emergency brake system according to claim 7 is characterized in that, described electronic parking control unit (1) links to each other with ignition signal (5), parking switch signal (6), gear signal (7) respectively; Described current sensing means (4) comprises current sensor, and described electronic parking control unit (1) calculates the size of Parking gripping power by the size of current that detects.
9. a kind of vehicle electronic emergency brake system according to claim 8 is characterized in that, described electronic parking control unit (1) detects obliquity sensor (3) signal, calculates the gradient size of the residing physical features of vehicle.
10. a kind of vehicle electronic emergency brake system according to claim 9, it is characterized in that, described electronic parking control unit (1) compares the sizes values of the described gradient and the calibration value of experiment, calculate the Parking gripping power corresponding with this ratio of slope, the Parking of control Parking actuating unit (2); Described Parking actuating unit (2) comprises motor, described electronic parking control unit (1) detects the size of the Parking gripping power that described Parking actuating unit (2) applies by sensor, when the Parking gripping power reaches required value, the control motor stops, otherwise, continue to apply the Parking gripping power.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210433812.6A CN102923111B (en) | 2012-11-02 | 2012-11-02 | A kind of vehicle electronic parking braking system and control method |
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| CN201210433812.6A CN102923111B (en) | 2012-11-02 | 2012-11-02 | A kind of vehicle electronic parking braking system and control method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202073A (en) * | 2014-06-20 | 2015-12-30 | 株式会社万都 | Electronic Parking Brake System And Method Of Controlling The Same |
| CN108001437A (en) * | 2016-11-01 | 2018-05-08 | 株式会社万都 | Controller of vehicle and its control method |
| CN108202730A (en) * | 2016-12-20 | 2018-06-26 | 宝沃汽车（中国）有限公司 | For the method and apparatus of parking control |
| CN110254414A (en) * | 2019-05-06 | 2019-09-20 | 万向钱潮股份有限公司 | A kind of electronic parking system of four-wheel braking |
| CN110539738A (en) * | 2018-05-28 | 2019-12-06 | 比亚迪股份有限公司 | electronic parking control method and device, storage medium and vehicle |
| CN111610347A (en) * | 2020-05-19 | 2020-09-01 | 国家电网有限公司 | Bus loop resistance wiring device |
| CN112721897A (en) * | 2021-01-28 | 2021-04-30 | 坤泰车辆系统（常州）有限公司 | Double-control double-drive pull-wire type EPB control system and parking force self-adaptive control method |
| CN113335245A (en) * | 2021-07-28 | 2021-09-03 | 中国第一汽车股份有限公司 | Control method for preventing rolling rejoining of electronic parking brake system from being triggered by mistake |
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| CN202429186U (en) * | 2012-06-21 | 2012-09-12 | 卢卡斯伟利达廊重制动器有限公司 | Electronic parking brake system |
| CN203157970U (en) * | 2012-11-02 | 2013-08-28 | 芜湖伯特利汽车安全系统有限公司 | Electronic parking brake system for vehicle |
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| JPS59143746A (en) * | 1983-02-05 | 1984-08-17 | Mazda Motor Corp | Electric parking brake device |
| CN101537831A (en) * | 2009-04-13 | 2009-09-23 | 浙江亚太机电股份有限公司 | Control method of automobile electric control parking and start assisting by manual transmission and system thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202073A (en) * | 2014-06-20 | 2015-12-30 | 株式会社万都 | Electronic Parking Brake System And Method Of Controlling The Same |
| CN108001437A (en) * | 2016-11-01 | 2018-05-08 | 株式会社万都 | Controller of vehicle and its control method |
| CN108001437B (en) * | 2016-11-01 | 2020-07-24 | 株式会社万都 | Vehicle control device and control method thereof |
| CN108202730A (en) * | 2016-12-20 | 2018-06-26 | 宝沃汽车（中国）有限公司 | For the method and apparatus of parking control |
| CN110539738A (en) * | 2018-05-28 | 2019-12-06 | 比亚迪股份有限公司 | electronic parking control method and device, storage medium and vehicle |
| CN110254414A (en) * | 2019-05-06 | 2019-09-20 | 万向钱潮股份有限公司 | A kind of electronic parking system of four-wheel braking |
| CN111610347A (en) * | 2020-05-19 | 2020-09-01 | 国家电网有限公司 | Bus loop resistance wiring device |
| CN112721897A (en) * | 2021-01-28 | 2021-04-30 | 坤泰车辆系统（常州）有限公司 | Double-control double-drive pull-wire type EPB control system and parking force self-adaptive control method |
| CN113335245A (en) * | 2021-07-28 | 2021-09-03 | 中国第一汽车股份有限公司 | Control method for preventing rolling rejoining of electronic parking brake system from being triggered by mistake |
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| CN102923111B (en) | 2016-08-03 |
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