CN103847529A - Pure-electric urban passenger car brake energy recycling system control method - Google Patents
Pure-electric urban passenger car brake energy recycling system control method Download PDFInfo
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- CN103847529A CN103847529A CN201210527548.2A CN201210527548A CN103847529A CN 103847529 A CN103847529 A CN 103847529A CN 201210527548 A CN201210527548 A CN 201210527548A CN 103847529 A CN103847529 A CN 103847529A
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Abstract
The invention discloses a pure-electric urban passenger car brake energy recycling system control method. The control method comprises the following steps of calculating the total needed brake force according to the attachment coefficient and load of a car axle; and obtaining an electric brake force by a fuzzy control algorithm according to the speed of a car and the brake pedal travel; calculating the maximal ground allowed brake force according to the ground attachment coefficient and the total mass of the car; subtracting the electric brake force by utilizing the total brake force to obtain the friction brake force; stopping the electric brake if the total brake force is greater than or equal to the maximal ground allowed brake force, executing the brake completely utilizing the friction force, and otherwise, executing the brake collectively through the calculated electric brake force and the friction brake force; repeating the steps according to a set time interval. By adopting the control method, the aim of automatic allocation of the friction brake force and the electric brake force can be mainly achieved, the friction brake force and the electric brake force can be allocated in a follow-up manner according to different car situations, and the brake energy recycling rate is greatly increased.
Description
Technical field
The present invention relates to pure Electric Bus field, relate in particular to a kind of pure Electric Bus brake energy recovering system control method.
Background technology
The braking of pure electric coach is made up of friction braking and electric braking two parts, generally all has braking energy recovering function.But what the braking energy using at present reclaimed that algorithm adopts the distribution of friction braking and electric braking is comparatively simple control method, main manifestations is for to control friction braking, makes friction braking a large amount of energy that dissipated; Due to friction braking and electric braking are distributed to employing fixed proportion, can not adopt corresponding brake measure according to concrete operating mode, make electric braking can not bring into play usefulness completely, and then cause energy dissipation.
Summary of the invention
The defect that the present invention is directed to above-mentioned prior art has proposed a kind of pure Electric Bus brake energy recovering system control method.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of pure Electric Bus brake energy recovering system control method, comprise that the speed of a motor vehicle, brake-pedal travel, ground attaching coefficient and the vehicular gross combined weight of receiving detection device transmission are as input, and accordingly the ratio of friction brake force and electric braking force is carried out to dynamic assignment, control their size, make in the situation that braking force meets the demands, recovery braking energy as much as possible, the size of brake-pedal travel has embodied the control intention of chaufeur.It comprises the steps:
A, calculate required total braking force according to the adhesion value of axletree and load meter; According to the speed of a motor vehicle and brake-pedal travel, adopt FUZZY ALGORITHMS FOR CONTROL, draw electric braking force.
Described FUZZY ALGORITHMS FOR CONTROL is:
Set up FUZZY ALGORITHMS FOR CONTROL rule list, wherein: the first row is the speed of a motor vehicle, it is divided into successively: very low, low, in low, in, middle height, high six grades, first row is brake-pedal travel, it is divided into successively: very short, short, medium, middle length, long five grades, what the centre portion of form was corresponding is electric braking force, and it is divided into successively: low, in low, in, middle height, high five grades, draw electric braking force according to the speed of a motor vehicle, brake-pedal travel parameter.
The corresponding concrete numerical value of the each grade of described electric braking force averages division according to electrical motor maximum output torque.
, there is overlapping region in adjacent rank in the division of each grade of the described speed of a motor vehicle and brake-pedal travel.
B, according to ground attaching coefficient and vehicular gross combined weight, calculate ground allow maximum braking force.
Whether the total braking force that C, determining step A calculate is more than or equal to the ground permission maximum braking force that step B calculates, and if so, is judged as emergency braking, and electric braking stops and using friction braking completely, otherwise execution step D.
D, judged whether ABS (anti-blocking brake system) actuation signal, if so, be judged as emergency braking, electric braking stops, and uses frictional vibration completely, otherwise execution step E.
E, according to formula: friction brake force=demand total braking force-electric braking force, calculates friction brake force.
Friction brake force and electric braking force that F, basis calculate, use friction brake force and electric braking force jointly to brake.
G, press setting-up time interval repeated execution of steps A to F, to realize the object of the ratio of friction brake force and electric braking force being carried out to dynamic assignment.
The invention has the beneficial effects as follows: by adopting pure Electric Bus brake energy recovering system control method of the present invention, can automatically distribute according to the control intention of vehicle actual travel situation and chaufeur the ratio of friction braking and electric braking, make in the situation that braking force can meet brake request recovery braking energy as much as possible.
Brief description of the drawings
Fig. 1 is control algorithm diagram of circuit of the present invention;
Detailed description of the invention
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, a kind of pure Electric Bus brake energy recovering system control method, comprise that the speed of a motor vehicle, brake-pedal travel, ground attaching coefficient and the vehicular gross combined weight of continuous receiving detection device transmission are as input, and accordingly the ratio of friction brake force and electric braking force is carried out to dynamic assignment, control their size, make in the situation that braking force meets the demands, recovery braking energy as much as possible, the size of brake-pedal travel has embodied the control intention of chaufeur.It comprises the steps:
A, calculate required total braking force: total braking force=front axle braking force+rear axle braking force.
Wherein, front axle braking force=front axle adhesion value * front axle load.
Rear axle braking force=rear axle adhesion value * rear axle load.
According to the speed of a motor vehicle and brake-pedal travel, adopt FUZZY ALGORITHMS FOR CONTROL, calculate electric braking force; Described FUZZY ALGORITHMS FOR CONTROL is exactly to being difficult to the complication system with math modeling is described accurately, adopt natural language (as large, medium and small) to be narrated, by qualitatively, coarse and fuzzy conditional statement expresses, and then calculates a kind of engineering common method of results needed.There are more data and textbook introduction about FUZZY ALGORITHMS FOR CONTROL, as being published in publication in 2002 by Beijing Aviation space flight press, by Zhang Huaguang, He Xiqin chief editor " fuzzy self-adaption control theory and application thereof ", in this book, has comparatively detailed discussion to fuzzy control theory and FUZZY ALGORITHMS FOR CONTROL.
B, according to ground attaching coefficient and vehicular gross combined weight, calculate ground allow maximum braking force:
Ground maximum braking force is F=￠ G, and in formula, ￠ is ground attaching coefficient, and G is vehicular gross combined weight.
Whether the total braking force that C, determining step A calculate is more than or equal to the ground permission maximum braking force that step B calculates, and if so, is judged as emergency braking, and electric braking stops and using friction braking completely, otherwise execution step D.
D, judged whether ABS actuation signal, if so, be judged as emergency braking, electric braking stops, and uses friction braking completely, otherwise execution step E.
E, according to formula: friction brake force=demand total braking force-electric braking force, calculates friction brake force.
Friction brake force and electric braking force that F, basis calculate, use the friction brake force and the electric braking force that calculate jointly to brake.
G, press setting-up time interval repeated execution of steps A to F, to realize the object of the ratio of friction brake force and electric braking force being carried out to dynamic assignment, the every 0.3s of program calculates once in this example.
FUZZY ALGORITHMS FOR CONTROL rule described in steps A is as shown in table 1:
Table 1: FUZZY ALGORITHMS FOR CONTROL rule list
In table 1, the first row is the speed of a motor vehicle, it is divided into successively: very low, low, in low, in, middle height, high six grades, first row is brake-pedal travel, it is divided into successively: very short, short, medium, middle length, long five grades, what the centre portion of form was corresponding is electric braking force, and it is divided into successively: low, in low, in, middle height, high five grades.Draw electric braking force according to the speed of a motor vehicle, brake-pedal travel parameter.
The corresponding concrete numerical value of the each grade of described electric braking force averages division according to electrical motor maximum output torque.
, there is overlapping region in adjacent rank in the division of each grade of the described speed of a motor vehicle and brake-pedal travel.The very low 0-15km/h that is defined as of for example speed of a motor vehicle, the low 10-30km/h etc. that is defined as of the speed of a motor vehicle.For example pedal total travel length is made as 1 again, and very short is 0-0.2, and short is 0.1-0.3.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (1)
1. a pure Electric Bus brake energy recovering system control method, is characterized in that: comprising: the speed of a motor vehicle, brake-pedal travel, ground attaching coefficient and vehicular gross combined weight that receiving detection device sends, as input, are then carried out following steps:
A, according to axletree adhesion value and the required total braking force of LOAD FOR;
According to the speed of a motor vehicle and brake-pedal travel, adopt FUZZY ALGORITHMS FOR CONTROL, draw electric braking force;
B, according to ground attaching coefficient and vehicular gross combined weight, calculate ground allow maximum braking force;
Whether the total braking force that C, determining step A calculate is more than or equal to the ground permission maximum braking force that step B calculates, and if so, electric braking stops, and uses friction braking completely, otherwise execution step D;
D, judged whether ABS actuation signal, if so, electric braking stops, and uses friction braking completely, otherwise execution step E;
E, according to formula: friction brake force=demand total braking force-electric braking force, calculates friction brake force;
Friction brake force and electric braking force that F, basis calculate, use friction brake force and electric braking force jointly to brake;
G, press setting-up time interval repeated execution of steps A to F.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210527548.2A CN103847529A (en) | 2012-11-30 | 2012-11-30 | Pure-electric urban passenger car brake energy recycling system control method |
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| CN201210527548.2A CN103847529A (en) | 2012-11-30 | 2012-11-30 | Pure-electric urban passenger car brake energy recycling system control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106080217A (en) * | 2016-07-12 | 2016-11-09 | 中车青岛四方车辆研究所有限公司 | Braking System for Multiple Units and braking method thereof |
| CN107985082A (en) * | 2017-12-12 | 2018-05-04 | 广州电力机车有限公司 | A kind of dumper electro-hydraulic brake method |
| CN108944865A (en) * | 2018-06-28 | 2018-12-07 | 潍柴动力股份有限公司 | The braking system and its braking method of new energy vehicle |
| CN111512351A (en) * | 2017-12-22 | 2020-08-07 | 米其林集团总公司 | Method for managing a fleet of trucks based on information relating to the tires of the trucks assembling said fleet |
-
2012
- 2012-11-30 CN CN201210527548.2A patent/CN103847529A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106080217A (en) * | 2016-07-12 | 2016-11-09 | 中车青岛四方车辆研究所有限公司 | Braking System for Multiple Units and braking method thereof |
| CN107985082A (en) * | 2017-12-12 | 2018-05-04 | 广州电力机车有限公司 | A kind of dumper electro-hydraulic brake method |
| CN111512351A (en) * | 2017-12-22 | 2020-08-07 | 米其林集团总公司 | Method for managing a fleet of trucks based on information relating to the tires of the trucks assembling said fleet |
| CN108944865A (en) * | 2018-06-28 | 2018-12-07 | 潍柴动力股份有限公司 | The braking system and its braking method of new energy vehicle |
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Application publication date: 20140611 |