CN102923111B - A kind of vehicle electronic parking braking system and control method - Google Patents
A kind of vehicle electronic parking braking system and control method Download PDFInfo
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- CN102923111B CN102923111B CN201210433812.6A CN201210433812A CN102923111B CN 102923111 B CN102923111 B CN 102923111B CN 201210433812 A CN201210433812 A CN 201210433812A CN 102923111 B CN102923111 B CN 102923111B
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Abstract
The invention discloses a kind of vehicle electronic parking braking system, including electronic parking control unit and control device, described electronic parking control unit is connected with described control device, and described electronic parking control unit includes obliquity sensor and current sensing means.Described electronic parking control unit is connected with ignition signal, parking switch signal, gear signal respectively；Described current sensing means includes that current sensor, described electronic parking control unit calculate the size of parking clamping force by the size of current detected.Technical scheme provided by the present invention, both can extend the mechanical life of control device, can improve again the noise during vehicle parking, reduce oil consumption；The most also there is low cost of manufacture, the features such as security and stability is high, highly reliable.
Description
Technical field
The invention belongs to vehicle electronic parking braking system manufacturing technology field, specifically, relate to a kind of vehicle electronic parking braking 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, the utilization for Mechanical course electronization is more extensive, and electronic brake system the most more and more occurs in the consumer visual field.Long time property braking function after electronic brake system (EPB:ElectricalParkBrake) refers to the provisional braking in driving conditions and parking combines, and is realized the technology of stopping brake by electronic control mode.
Electronic brake system can calculate, by its control system, the sliding force that vehicle produces on the slope due to gravity, then by trailing wheel applying brake force is balanced sliding force, enables the vehicle to stop on the slope.When vehicle start, calculate, by the signal of the displacement transducer on control system acquisition clutch pedal and the size of throttle, the brake force needing to apply, known the size of engine traction simultaneously by high-speed CAN and engine computer communication.Computer calculates the increase of engine traction automatically, reduces brake force accordingly.When pull strength enough overcomes sliding force, computer drives motor to release braking, thus realizes the smooth and easy starting of vehicle.
In prior art, vehicle electronic parking braking system technology is in Rapid development stage, but a lot of aspect there is also weak point.Vehicle electronic parking braking system of the prior art, when vehicle needs parking, now electronic parking control unit controls control device and applies fixing parking clamping force parking (this clamping force is invariable), and the clamping force size implemented is typically the maximum that car load requires, to guarantee that vehicle can safe parking on relatively steep gradient.There is many technical problems in the prior art:
1, apply the fixing parking clamping force of maximum for a long time due to electronic brake system of the prior art, and to ensure that this clamping force is invariable, cause be greatly shortened the service life of control device.
2, apply the fixing parking clamping force of maximum for a long time due to electronic brake system of the prior art, and to ensure that this clamping force is invariable, make the oil consumption of car load be greatly increased, cause the biggest waste, be unfavorable for energy-conserving and environment-protective.
3, apply the fixing parking clamping force of maximum for a long time due to electronic brake system of the prior art, and to ensure that this clamping force is invariable so that during parking, create the noise being difficult to improve, cause noise pollution.
Summary of the invention
The technical problem to be solved is, vehicle electronic parking braking system of the prior art, when vehicle is during parking, electronic parking control unit controls control device and applies fixing parking clamping force parking (this clamping force is invariable), causes be greatly shortened the service life of control device；The oil consumption making car load is greatly increased, and causes the biggest waste, is unfavorable for energy-conserving and environment-protective；Make during parking, create the noise being difficult to improve, cause the technical problems such as noise pollution, and provide a kind of vehicle electronic parking braking system and control method.
The technology design of the present invention is that, through understanding prior art analysis, vehicle is on the ramp that the gradient varies in size during parking, and required parking clamping force is different, and the parking clamping force that control device can apply to vary in size carries out parking.Concrete design is, the present invention provides a kind of vehicle electronic parking braking system and control method, to being equipped with the vehicle of electronic brake system when parking, electronic parking control unit detection obliquity sensor signal, analyze the gradient size judging the physical features residing for vehicle, calculate vehicle parking clamping force on this ramp required for parking, control control device and carry out parking by predetermined parking clamping force.
Technical scheme provided by the present invention is, a kind of vehicle electronic parking braking system control method, including electronic parking control unit, obliquity sensor, control device,
The first step, described electronic parking control unit detection ignition signal, parking switch signal, gear signal；
Second step, described electronic parking control unit detection obliquity sensor signal；
3rd step, described electronic parking control unit, according to obliquity sensor signal, calculates the clamping force that described control device is corresponding；
4th step, described electronic parking control unit sends instruction to described control device；
5th step, described control device starts action, to the corresponding clamping force calculated described in brake disc applying；
6th step, when reaching described corresponding clamping force, described control device keeps this clamping force.
Described electronic parking control unit detection obliquity sensor signal, the gradient size of calculating physical features residing for vehicle.
The sizes values of the described gradient is compared by described electronic parking control unit with the calibration value of experiment, calculates the parking clamping force corresponding with this value of slope, controls control device parking.
Described control device includes motor, described electronic parking control unit detects the size of the parking clamping force that described control device is applied by sensor, when parking clamping force reaches required value, controls motor and stops, otherwise, parking clamping force is continued to.
Described sensor is the current sensor of detection current of electric, and described electronic parking control unit calculates the size of parking clamping force by the size of current detected.
Described motor includes hollow travel stage and clamping phase, and described hollow travel stage is successive with described clamping phase, starts the increase of the electric current with motor in described clamping phase parking clamping force and increases, when parking clamping force to required value, motor stalls, electric current vanishing, parking completes.
A kind of vehicle electronic parking braking system, including electronic parking control unit and control device, described electronic parking control unit is connected with described control device, and described electronic parking control unit includes obliquity sensor and current sensing means.
Described electronic parking control unit is connected with ignition signal, parking switch signal, gear signal respectively；Described current sensing means includes that current sensor, described electronic parking control unit calculate the size of parking clamping force by the size of current detected.
Described electronic parking control unit detection obliquity sensor signal, the gradient size of calculating physical features residing for vehicle.
The sizes values of the described gradient is compared by described electronic parking control unit with the calibration value of experiment, calculates the parking clamping force corresponding with this value of slope, controls control device parking；Described control device includes motor, described electronic parking control unit detects the size of the parking clamping force that described control device is applied by sensor, when parking clamping force reaches required value, controls motor and stops, otherwise, parking clamping force is continued to.
Use technical scheme provided by the present invention, can effectively solve the problem that vehicle electronic parking braking system of the prior art, when vehicle is during parking, electronic parking control unit controls control device and applies fixing parking clamping force parking (this clamping force is invariable), causes be greatly shortened the service life of control device；The oil consumption making car load is greatly increased, and causes the biggest waste, is unfavorable for energy-conserving and environment-protective；Make during parking, create the noise being difficult to improve, cause the technical problems such as noise pollution, simultaneously, technical scheme provided by the present invention, when vehicle is in parking, electronic brake system is by the gradient size of physical features residing for obliquity sensor detection vehicle, through calculation process, controls the predetermined parking clamping force of control device applying and carries out parking.Technical scheme provided by the present invention, both can extend the mechanical life of control device, can improve again the noise during vehicle parking, reduce oil consumption；The most also there is low cost of manufacture, the features such as security and stability is high, highly reliable.
Accompanying drawing explanation
In conjunction with accompanying drawing, the present invention is further illustrated:
Fig. 1 is the structural representation of the present invention；
Hill gradient size residing for the vehicle of Fig. 2 present invention and parking clamping force corresponding relation schematic diagram；
The corresponding relation figure signal of the size of current of Fig. 3 present invention and parking clamping force；
Fig. 4 control flow chart of the present invention；
Wherein, 1 is electronic parking control unit；2 is control device；3 is obliquity sensor；4 is current sensing means；5 is ignition signal；6 is parking switch signal；7 is gear signal.
Detailed description of the invention
A kind of vehicle electronic parking braking system control method provided by the present invention, including electronic parking control unit 1, obliquity sensor 3, control device 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 signal；3rd step, described electronic parking control unit 1, according to obliquity sensor 3 signal, calculates the clamping force that described control device 2 is corresponding；4th step, described electronic parking control unit 1 sends instruction to described control device 2；5th step, described control device 2 starts action, to the corresponding clamping force calculated described in brake disc applying.6th step, when reaching described corresponding clamping force, described control device 2 keeps this clamping force.Described electronic parking control unit 1 detects obliquity sensor 3 signal, the gradient size of calculating physical features residing for vehicle.The sizes values of the described gradient is compared by described electronic parking control unit 1 with the calibration value of experiment, calculates the parking clamping force corresponding with this value of slope, controls control device 2 parking.Described control device 2 includes motor, described electronic parking control unit 1 detects the size of the parking clamping force that described control device 2 is applied by sensor, when parking clamping force reaches required value, controls motor and stops, otherwise, parking clamping force is continued to.Described sensor is the current sensor of detection current of electric, and described electronic parking control unit 1 calculates the size of parking clamping force by the size of current detected.Described motor includes hollow travel stage and clamping phase, and described hollow travel stage is successive with described clamping phase, starts the increase of the electric current with motor in described clamping phase parking clamping force and increases, when parking clamping force to required value, motor stalls, electric current vanishing, parking completes.
A kind of vehicle electronic parking braking system, including electronic parking control unit 1 and control device 2, described electronic parking control unit 1 is connected with described control device 2, is provided with obliquity sensor 3 and current sensing means 4 in described electronic parking control unit 1.Described electronic parking control unit 1 is connected with ignition signal 5, parking switch signal 6, gear signal 7 respectively；Described current sensing means 4 includes that current sensor, described electronic parking control unit 1 calculate the size of parking clamping force by the size of current detected.Described electronic parking control unit 1 detects obliquity sensor 3 signal, the gradient size of calculating physical features residing for vehicle.The sizes values of the described gradient is compared by described electronic parking control unit 1 with the calibration value of experiment, calculates the parking clamping force corresponding with this value of slope, controls control device 2 parking；Described control device 2 includes motor, described electronic parking control unit 1 detects the size of the parking clamping force that described control device 2 is applied by sensor, when parking clamping force reaches required value, controls motor and stops, otherwise, parking clamping force is continued to.
The present invention is for being equipped with the vehicle of electronic brake system when parking, electronic parking control unit 1 detects obliquity sensor 3 signal, calculate the gradient size of physical features residing for vehicle, control control device 2 and apply corresponding parking clamping force and carry out parking.
The present invention overcomes conventional electronic brake system to use the defect of fixing parking clamping force control mode, to improve the performance of electronic brake system.The electronic brake system parking control method that the present invention relates to mainly includes the following aspects:
1, detection obliquity sensor 3 signal, the gradient size of calculating physical features residing for vehicle.
2, the calibration value of the sizes values of this gradient with experiment is compared by electronic parking control unit 1, calculates the parking clamping force corresponding with this value of slope, controls control device 2 and carries out parking with predetermined parking clamping force.
3, electronic parking control unit 1 detects the size of the parking clamping force that control device 2 is applied by sensor, when parking clamping force reaches required value, controls motor and stops.
The value of obliquity sensor 3 when being positioned on the ramp that the gradient varies in size by experimental calibration vehicle, and the parking clamping force corresponding with the gradient.
Fig. 1 is a kind of electronic brake system designed by the present invention and the system architecture diagram of parking control method.Electronic brake system is made up of electronic parking control unit 1 and control device 2, and wherein electronic control unit 1 is integrated with obliquity sensor 3 and current sensing means 4.Obliquity sensor 3 is for detecting the size of hill gradient residing for vehicle, and this signal is passed to processor.Current sensing means 4 is for detecting the running current of motor in control device 2, and electronic parking control unit knows the parking clamping force of control device by this signal.Parking signal derives from ignition signal 5, parking switch 6, gear signal 7.
Fig. 2 be the present invention vehicle body residing for physical features gradient size and parking clamping force corresponding relation figure.In figure, transverse axis is gradient size, and the longitudinal axis is parking clamping force size.The gradient is divided into several scopes (as shown being three scopes) by the present invention, applies different parking clamping forces in different range of grade.
Fig. 3 is the current of electric size corresponding relation figure with parking clamping force of the present invention.Motor is through starting process, at t1Rear entrance hollow travel stage, t2After moment, parking clamping force starts the increase of the electric current with motor and increases, and when parking clamping force to required value, motor stalls, electric current vanishing, parking completes.
The control flow chart of a kind of electronic brake system parking control method that Fig. 4 designs for the present invention.After parking signal produces, electronic parking control unit 1 performs step S1 and gathers obliquity sensor signal 3.Step S2 is, after electronic parking control unit 1 gathers obliquity sensor signal 3, to be compared with experimental calibration value by obliquity sensor signal 3, calculates the gradient size of physical features residing for vehicle.Then performing step S3, electronic parking control unit 1 calculates, according to the result of previous step, the parking clamping force that vehicle is required on this ramp.Next enter step S4, control control device 2 and carry out parking.And then, in step s 5, by the motor operating current of detection control device, electronic parking control unit 1 judges that parking clamping force has reached required value the most.If reaching required value, then terminate this process；If it is not, continue to judge, until reaching required value.
Above example is only in order to illustrate rather than restriction, although the present invention being described in detail with reference to preferred embodiment, it will be understood by those within the art that, the present invention is modified or equivalent, without departing from the spirit and scope of the present invention, it all should be contained in the middle of scope of the presently claimed invention.
Claims (1)
1. a vehicle electronic parking braking system control method, it is characterised in that include electronic parking control unit (1), obliquity sensor (3), control device (2)；Described electronic parking control unit (1) is connected with described control device (2), and described electronic parking control unit (1) includes obliquity sensor (3) and current sensing means (4)；Described electronic parking control unit (1) is connected with ignition signal (5), parking switch signal (6), gear signal (7) respectively；Described current sensing means (4) includes that current sensor, described electronic parking control unit (1) calculate the size of parking clamping force by the size of current detected；Described electronic parking control unit (1) detection obliquity sensor (3) signal, the gradient size of calculating physical features residing for vehicle；Parking signal derives from ignition signal (5), parking switch signal (6), gear signal (7)；
Described electronic parking control unit (1) carries out parking control as follows；Through understanding prior art analysis, vehicle is on the ramp that the gradient varies in size during parking, and required parking clamping force is different, and the parking clamping force that control device can apply to vary in size carries out parking；To being equipped with the vehicle of electronic brake system when parking, electronic parking control unit detection obliquity sensor signal, analyze the gradient size judging the physical features residing for vehicle, calculate vehicle parking clamping force on this ramp required for parking, control control device and carry out parking by predetermined parking clamping force:
The first step, described electronic parking control unit (1) detection ignition signal (5), parking switch signal (6), gear signal (7)；
Second step, described electronic parking control unit (1) detection obliquity sensor (3) signal；Described electronic parking control unit (1) detection obliquity sensor (3) signal, the gradient size of calculating physical features residing for vehicle；The described gradient is divided into several scopes, applies different parking clamping forces in different range of grade；
3rd step, described electronic parking control unit (1), according to obliquity sensor (3) signal, calculates the clamping force that described control device (2) is corresponding；The sizes values of the described gradient is compared by described electronic parking control unit (1) with the calibration value of experiment, calculates the parking clamping force corresponding with this value of slope, controls control device (2) parking；
4th step, described electronic parking control unit (1) sends instruction to described control device (2)；
5th step, described control device (2) beginning action, to the corresponding clamping force calculated described in brake disc applying；By the motor operating current of detection control device, electronic parking control unit (1) judges that parking clamping force has reached required value the most；If reaching required value, then terminate this process；If it is not, continue to judge, until reaching required value；Described motor includes hollow travel stage and clamping phase, and described hollow travel stage is successive with described clamping phase, starts the increase of the electric current with motor in described clamping phase parking clamping force and increases, when parking clamping force to required value, motor stalls, electric current vanishing, parking completes；
6th step, when reaching described corresponding clamping force, described control device (2) keeps this clamping force.
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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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| CN102923111A CN102923111A (en) | 2013-02-13 |
| CN102923111B true CN102923111B (en) | 2016-08-03 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102249329B1 (en) * | 2014-06-20 | 2021-05-07 | 주식회사 만도 | Electronic Parking Brake system |
| KR102548846B1 (en) * | 2016-11-01 | 2023-06-28 | 에이치엘만도 주식회사 | Vehicle control apparatus and control method thereof |
| CN108202730B (en) * | 2016-12-20 | 2020-08-18 | 宝沃汽车（中国）有限公司 | Method and device for 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 circuit 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 |
| CN113335245B (en) * | 2021-07-28 | 2022-09-23 | 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 |
| CN117928795A (en) * | 2022-10-13 | 2024-04-26 | 芜湖伯特利汽车安全系统股份有限公司 | Clamping force estimation method and system and automobile |
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Patent Citations (4)
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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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