CN107618495A - A kind of Multi Axle Drive Vehicle Electro-mechanical brake system and braking method - Google Patents
A kind of Multi Axle Drive Vehicle Electro-mechanical brake system and braking method Download PDFInfo
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- CN107618495A CN107618495A CN201710850637.3A CN201710850637A CN107618495A CN 107618495 A CN107618495 A CN 107618495A CN 201710850637 A CN201710850637 A CN 201710850637A CN 107618495 A CN107618495 A CN 107618495A
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Abstract
The present invention discloses a kind of Multi Axle Drive Vehicle Electro-mechanical brake system and braking method, including：Brake subsystem, vehicle master controller and vehicle power line；Vehicle master controller is connected by vehicle power line with brake subsystem；Brake subsystem includes：Electrokinetic cell, high voltage control case, auxiliary braking unit, motor braking unit；Electrokinetic cell, auxiliary braking unit, motor braking unit are connected with high voltage control case respectively, motor braking brake unit wheel of vehicle.The charging section of present invention optimization electrokinetic cell, not only rationally make use of motor feeding braking energy back but also had carried out good protection to battery；Intelligent APU auxiliary brakings unit is configured, takes full advantage of the regenerating braking energy of motor, so as to preferably protect mechanical braking unit.
Description
Technical field
The present invention relates to motor vehicle braking system, and in particular to a kind of Multi Axle Drive Vehicle Electro-mechanical brake system and braking
Method.
Background technology
In face of the challenge of energy crisis, environmental pollution and global warming, energy-saving and emission-reduction subtract carbon turns into Chinese vapour
The top priority of car industry, and a kind of good solution can be provided with new-energy automobile for this by saving.It is particularly near several
Year, China's new-energy automobile industry has a great development, wherein again using pure electric automobile as main sticking point.
Compared to orthodox car, new-energy automobile can be by a part of braking energy in the form of regenerative braking in braking
Reclaimed and mend electricity to battery, serve good energy-saving effect.But generally regenerative braking amount is more than battery requirements electricity, and
The braking energy having more finally can only just be slatterned in the form of frictional heat.
The content of the invention
Can be effectively electromechanical combined using the Multi Axle Drive Vehicle of braking energy to solve the above problems, present invention offer is a kind of
Brakes and braking method.
The technical scheme is that：A kind of Multi Axle Drive Vehicle Electro-mechanical brake system, including：Brake subsystem,
Vehicle master controller and vehicle power line；The vehicle master controller is connected by vehicle power line with brake subsystem；
The brake subsystem includes：Electrokinetic cell, high voltage control case, auxiliary braking unit, motor braking unit；The power
Battery, auxiliary braking unit, motor braking unit are connected with high voltage control case respectively, the motor braking brake unit vehicle car
Wheel；
The vehicle master controller：Power battery charged state is obtained, when motor braking unit is braked, if electrokinetic cell
Charged to be less than the first charged preset value, then vehicle master controller is voltage-controlled through height by the initial residual braking energy of motor braking unit
Case processed passes to power battery charging, and the quadratic residue braking energy after power battery charging passes to through high voltage control case
Auxiliary braking unit；If it is more than the first charged preset value power battery charged, vehicle master controller is by motor braking unit
Initial residual braking energy passes to auxiliary braking unit through high voltage control case；
The initial residual braking energy is that total braking energy removes motor braking unit system caused by motor braking unit
Move the remaining braking energy after institute's consumed energy itself；The quadratic residue braking energy removes for initial residual braking energy
Remaining braking energy after power battery charging institute consumed energy.
Further, brake subsystem also includes mechanical braking unit, the mechanical braking brake unit wheel of vehicle.
Further, vehicle master controller also obtains the brake-pedal travel, vehicle speed and accelerator pedal stroke of vehicle；
When brake-pedal travel is less than the first stroke preset value, or speed is more than the first speed preset value and brake pedal, throttle
When pedal is destroked, vehicle main controller controls motor braking unit is braked；
When brake-pedal travel is more than the first stroke preset value, vehicle main controller controls motor braking unit and mechanical braking list
Member is braked jointly.
Further, the first charged preset value is 90%, and the first stroke preset value is 20%, and the first speed preset value is
30km/h。
Further, comprising multiple brake subsystems.
The present invention also provides a kind of braking method based on above-mentioned Multi Axle Drive Vehicle Electro-mechanical brake system, including
Following steps：
Vehicle master controller obtains power battery charged state；
When motor braking unit is braked, if power battery charged be less than the first charged preset value, vehicle master controller
The initial residual braking energy of motor braking unit is passed into power battery charging through high voltage control case, through power battery charging
Quadratic residue braking energy afterwards passes to auxiliary braking unit through high voltage control case；
If it is more than the first charged preset value power battery charged, vehicle master controller is by the initial residual system of motor braking unit
Energy passes to auxiliary braking unit through high voltage control case；
The initial residual braking energy is that total braking energy removes motor braking unit system caused by motor braking unit
Move the remaining braking energy after institute's consumed energy itself；The quadratic residue braking energy removes for initial residual braking energy
Remaining braking energy after power battery charging institute consumed energy.
Further, it is further comprising the steps of：
Vehicle master controller obtains brake-pedal travel, vehicle speed and the accelerator pedal stroke of vehicle；
When brake-pedal travel is less than the first stroke preset value, or speed is more than the first speed preset value and brake pedal, throttle
When pedal is destroked, vehicle main controller controls motor braking unit is braked；
When brake-pedal travel is more than the first stroke preset value, vehicle main controller controls motor braking unit and mechanical braking list
Member is braked jointly.
Further, the first charged preset value is 90%, and the first stroke preset value is 20%, and the first speed preset value is
30km/h。
Multi Axle Drive Vehicle Electro-mechanical brake system provided by the invention and braking method, optimize the charging of electrokinetic cell
Section, it not only rationally make use of motor feeding braking energy back but also good protection carried out to battery；Configure intelligent APU auxiliary brakings
Unit, the regenerating braking energy of motor is taken full advantage of, so as to preferably protect mechanical braking unit.
Brief description of the drawings
Fig. 1 is specific embodiment of the invention vehicle brakes block architecture diagram.
Fig. 2 is specific embodiment of the invention vehicle brake subsystem architecture block diagram.
In figure, 1-6, vehicle brake subsystem, 7, vehicle master controller, 8, electrokinetic cell, 9, high voltage control case, 10, electricity
Mechanism moving cell, 11, wheel, 12, auxiliary braking unit, 13, mechanical braking unit.
Embodiment
Below in conjunction with the accompanying drawings and the present invention will be described in detail by specific embodiment, and following examples are to the present invention
Explanation, and the invention is not limited in implementation below.
Multi Axle Drive Vehicle Electro-mechanical brake system provided by the invention and braking method, its core concept are：Vehicle
Master controller 7 gives braking energy total tune and reasonable distribution to each brake subsystem.Each brake subsystem is again comprising machinery system
Dynamic, motor regenerative braking and APU auxiliary braking three parts.System uses tandem working pattern, i.e. motor braking is preferential, Ran Hou electricity
Mechanism is dynamic to be acted on mechanical braking.The system is provided with multiple threshold values in control strategy, can make full use of motor regeneration system
Energy, and a set of APU EBAs are added, to provide extra braking power.It has been obviously improved the braking of vehicle
Security.For generally existing motor braking energy regenerating deficiency the problem of provide a kind of new solution.The electromechanics is multiple
It is reliable and energy-saving to close brakes, the friction loss of mechanical braking can be greatly reduced, improve its life-span.
As shown in figure 1, the Multi Axle Drive Vehicle Electro-mechanical brake system that the present embodiment provides, including：Multiple braking
System 1-6, vehicle master controller 7 and vehicle power line.
The total tune of vehicle master controller 7, each vehicle brake subsystem can independent control, mutual redundancy.Vehicle main control
Device 7 is shifted according to vehicle vertical load dynamically to adjust the severity of braking of each brake subsystem, so as to ensure that the braking of vehicle is pacified
Quan Xing.
As shown in Fig. 2 brake subsystem includes：Electrokinetic cell 8, high voltage control case 9, auxiliary braking unit 12, motor system
Moving cell 10 and mechanical braking unit 13；Electrokinetic cell 8, auxiliary braking unit 12（APU）, motor braking unit 10 respectively with height
Pressure control cabinet 9 connects, and motor braking unit 10 and mechanical braking unit 13 distinguish abrupt deceleration vehicle wheel 11.
The braking strategy of the present embodiment brakes uses series model, i.e. motor braking preference strategy.Motor braking point
Two kinds of forms, one kind are that vehicle master controller 7 first sets a brake-pedal travel limit value, when tread depths are less than the limit value
When, worked by motor braking；And when tread depths are more than the limit value, motor braking and mechanical braking collective effect.It is another
Kind is the speed threshold values that vehicle master controller 7 sets one, when speed is more than the threshold values, if brake pedal and gas pedal
All there is no path increment, vehicle produces certain braking amount by motor.
Specifically, vehicle master controller 7 obtains brake-pedal travel, vehicle speed and the accelerator pedal stroke of vehicle.When
Brake-pedal travel is less than the first stroke preset value, or speed is more than the first speed preset value and brake pedal, gas pedal are equal
When destroked, the controlled motor brake unit 10 of vehicle master controller 7 is braked；When brake-pedal travel is pre- more than the first stroke
If value, the controlled motor brake unit 10 of vehicle master controller 7 and mechanical braking unit 13 are braked jointly.
First stroke preset value may be configured as 20%, and the first speed preset value may be configured as 30km/h.
In addition, under emergency brake of vehicle state, mechanical braking starts, and motor braking exits, and realizes mechanical emergency brake,
Ensure brake safe.
In order to greatly utilize motor braking, the system increases a set of EBA, i.e., with motor towing astern
Braking consumption power is exhausted in engine, so as to provide extra braking power, lifts the braking safety of vehicle.
In whole braking procedure, vehicle master controller 7 is according to the state of electrokinetic cell 8, the state of auxiliary braking unit 12, electricity
The multi-party combined factors such as state of mechanism moving cell 10 consider, motor braking operating point are adjusted in good time, in motor braking, auxiliary braking
The integral dispensing of braking energy is completed between mechanical braking three, again can be at utmost while ensureing each system normal operation
Reclaim braking energy.
In the case of normal brake application, vehicle master controller 7 is mainly according to the state-of-charge of electrokinetic cell 8（SOC）, it is several to distribute
Kind braking energy.In principle first based on the charging of electrokinetic cell 8, followed by auxiliary braking, it is finally mechanical friction braking.
Specifically, vehicle master controller 7 obtains the state-of-charge of electrokinetic cell 8, when motor braking unit 10 is braked,
It is less than the first charged preset value if electrokinetic cell 8 is charged, vehicle master controller 7 is by the initial residual system of motor braking unit 10
Energy passes to electrokinetic cell 8 through high voltage control case 9 and charged, the quadratic residue braking energy after being charged through electrokinetic cell 8
Auxiliary braking unit 12 is passed to through high voltage control case 9；If electrokinetic cell 8 is charged to be more than the first charged preset value, vehicle master
The initial residual braking energy of motor braking unit 10 is passed to auxiliary braking unit 12 by controller 7 through high voltage control case 9.Its
Middle initial residual braking energy is that total braking energy removing motor braking unit 10 is braked caused by motor braking unit 10
The energy itself consumed；Quadratic residue braking energy removes electrokinetic cell 8 by initial residual braking energy and charges what is consumed
Energy.
Braking energy distribution is illustrated further below.General vehicle master controller 7 can be to the charged of electrokinetic cell 8
State demarcation is three sections, corresponds to two threshold values respectively：A and B（I.e. first charged preset value）（0<A<B<1）.
When the state-of-charge of electrokinetic cell 8 is less than threshold value A, show that electrokinetic cell 8 is in low state of charge, vehicle can combine
The maximum charge ability of motor maximum braking torque and electrokinetic cell 8 carries out motor braking reverse charging.During this, motor
High efficient area can be in, and is generally higher than by the energy of motor regenerative braking feedback needed for battery, now can will be unnecessary
Energy expenditure is in auxiliary braking unit 12.
When the state-of-charge of electrokinetic cell 8 is between threshold value A and threshold value B, show that electrokinetic cell 8 is in medium charge shape
State, its maximum charge ability can also be reduced accordingly, and corresponding motor braking efficiency can also reduce, and the power consumption of motor in itself also can
Increase, and consumed in itself except motor by the energy of motor regenerative braking feedback, a part continues to mend electricity to electrokinetic cell 8,
Another part is also consumed by auxiliary braking unit 12.
When the state-of-charge of electrokinetic cell 8 is more than threshold value B, show that electrokinetic cell 8 is in high state of charge, at this moment power electric
Pond 8 does not allow feedback to charge, and the retardation efficiency of motor also can further adjust reduction, and the power consumption of motor in itself also can be further
Increase, by the energy of motor regenerative braking feedback in addition to itself is consumed, only consumption is on auxiliary braking unit 12.
Specifically, threshold value A may be configured as 60%, threshold value B（I.e. first charged preset value）It may be configured as 90%.
Braking method of the present embodiment based on above-mentioned brakes, specifically includes following steps：
Vehicle master controller 7 obtains brake-pedal travel, vehicle speed and the accelerator pedal stroke of vehicle；
When brake-pedal travel is less than the first stroke preset value, or speed is more than the first speed preset value and brake pedal, throttle
When pedal is destroked, the controlled motor brake unit 10 of vehicle master controller 7 is braked；
When brake-pedal travel is more than the first stroke preset value, the controlled motor brake unit 10 of vehicle master controller 7 and machinery system
Moving cell 13 is braked jointly.
Wherein, it is further comprising the steps of when motor braking unit 10 is braked：
Vehicle master controller 7 obtains the state-of-charge of electrokinetic cell 8；
If electrokinetic cell 8 is charged to be less than the first charged preset value, vehicle master controller 7 remains the initial of motor braking unit 10
Remaining braking energy passes to electrokinetic cell 8 through high voltage control case 9 and charged, and the quadratic residue after being charged through electrokinetic cell 8 is braked
Energy passes to auxiliary braking unit 12 through high voltage control case 9；
If electrokinetic cell 8 is charged to be more than the first charged preset value, vehicle master controller 7 remains the initial of motor braking unit 10
Remaining braking energy passes to auxiliary braking unit 12 through high voltage control case 9.
Wherein, initial residual braking energy is that total braking energy removes motor braking unit caused by motor braking unit 10
10 carry out braking the energy itself consumed；Quadratic residue braking energy is that initial residual braking energy removing electrokinetic cell 8 fills
The energy that electricity is consumed.
Wherein, the first charged preset value is 90%, and the first stroke preset value is 20%, and the first speed preset value is 30km/h.
In the braking procedure of the present embodiment, vehicle master controller 7 is participated in the overall process, according to electrokinetic cell 8, auxiliary braking list
First multi-party combined factors of 12 grades consider, adjust motor braking operating point in good time, complete the integral dispensing of braking energy, ensure each system
Braking energy can be at utmost reclaimed again while normal operation of uniting.
Disclosed above is only the preferred embodiment of the present invention, but the present invention is not limited to this, any this area
What technical staff can think does not have creative change, and some improvement made without departing from the principles of the present invention and
Retouching, should all be within the scope of the present invention.
Claims (8)
- A kind of 1. Multi Axle Drive Vehicle Electro-mechanical brake system, it is characterised in that including：Brake subsystem, vehicle main control Device and vehicle power line；The vehicle master controller is connected by vehicle power line with brake subsystem；The brake subsystem includes：Electrokinetic cell, high voltage control case, auxiliary braking unit, motor braking unit；The power Battery, auxiliary braking unit, motor braking unit are connected with high voltage control case respectively, the motor braking brake unit vehicle car Wheel；The vehicle master controller：Power battery charged state is obtained, when motor braking unit is braked, if electrokinetic cell Charged to be less than the first charged preset value, then vehicle master controller is voltage-controlled through height by the initial residual braking energy of motor braking unit Case processed passes to power battery charging, and the quadratic residue braking energy after power battery charging passes to through high voltage control case Auxiliary braking unit；If it is more than the first charged preset value power battery charged, vehicle master controller is by motor braking unit Initial residual braking energy passes to auxiliary braking unit through high voltage control case；The initial residual braking energy is that total braking energy removes motor braking unit system caused by motor braking unit Move the remaining braking energy after institute's consumed energy itself；The quadratic residue braking energy removes for initial residual braking energy Remaining braking energy after power battery charging institute consumed energy.
- 2. Multi Axle Drive Vehicle Electro-mechanical brake system according to claim 1, it is characterised in that brake subsystem is also Including mechanical braking unit, the mechanical braking brake unit wheel of vehicle.
- 3. Multi Axle Drive Vehicle Electro-mechanical brake system according to claim 2, it is characterised in that vehicle master controller Also obtain brake-pedal travel, vehicle speed and the accelerator pedal stroke of vehicle；When brake-pedal travel is less than the first stroke preset value, or speed is more than the first speed preset value and brake pedal, throttle When pedal is destroked, vehicle main controller controls motor braking unit is braked；When brake-pedal travel is more than the first stroke preset value, vehicle main controller controls motor braking unit and mechanical braking list Member is braked jointly.
- 4. Multi Axle Drive Vehicle Electro-mechanical brake system according to claim 3, it is characterised in that first is charged default It is worth for 90%, the first stroke preset value is 20%, and the first speed preset value is 30km/h.
- 5. the Multi Axle Drive Vehicle Electro-mechanical brake system according to claim any one of 1-4, it is characterised in that include Multiple brake subsystems.
- 6. a kind of braking method of the Multi Axle Drive Vehicle Electro-mechanical brake system based on described in any one of 1-5, its feature exist In comprising the following steps：Vehicle master controller obtains power battery charged state；When motor braking unit is braked, if power battery charged be less than the first charged preset value, vehicle master controller The initial residual braking energy of motor braking unit is passed into power battery charging through high voltage control case, through power battery charging Quadratic residue braking energy afterwards passes to auxiliary braking unit through high voltage control case；If it is more than the first charged preset value power battery charged, vehicle master controller is by the initial residual system of motor braking unit Energy passes to auxiliary braking unit through high voltage control case；The initial residual braking energy is that total braking energy removes motor braking unit system caused by motor braking unit Move the remaining braking energy after institute's consumed energy itself；The quadratic residue braking energy removes for initial residual braking energy Remaining braking energy after power battery charging institute consumed energy.
- 7. braking method according to claim 6, it is characterised in that further comprising the steps of：Vehicle master controller obtains brake-pedal travel, vehicle speed and the accelerator pedal stroke of vehicle；When brake-pedal travel is less than the first stroke preset value, or speed is more than the first speed preset value and brake pedal, throttle When pedal is destroked, vehicle main controller controls motor braking unit is braked；When brake-pedal travel is more than the first stroke preset value, vehicle main controller controls motor braking unit and mechanical braking list Member is braked jointly.
- 8. braking method according to claim 7, it is characterised in that the first charged preset value is 90%, and the first stroke is preset It is worth for 20%, the first speed preset value is 30km/h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710850637.3A CN107618495A (en) | 2017-09-20 | 2017-09-20 | A kind of Multi Axle Drive Vehicle Electro-mechanical brake system and braking method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710850637.3A CN107618495A (en) | 2017-09-20 | 2017-09-20 | A kind of Multi Axle Drive Vehicle Electro-mechanical brake system and braking method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109050500A (en) * | 2018-10-16 | 2018-12-21 | 杭叉集团股份有限公司 | A kind of fork truck braking control system and method |
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| US20110214954A1 (en) * | 2010-03-05 | 2011-09-08 | Yuichi Tashiro | Electromagnetic type retarder |
| WO2011145423A1 (en) * | 2010-05-17 | 2011-11-24 | 日産自動車株式会社 | Control device for use in vehicle, adapted to control safety measures against electric power supply failure |
| CN102481913A (en) * | 2009-09-03 | 2012-05-30 | 丰田自动车株式会社 | Brake control device |
| CN106809020A (en) * | 2015-11-30 | 2017-06-09 | 北汽福田汽车股份有限公司 | auxiliary braking method, system and vehicle |
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- 2017-09-20 CN CN201710850637.3A patent/CN107618495A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102481913A (en) * | 2009-09-03 | 2012-05-30 | 丰田自动车株式会社 | Brake control device |
| US20110214954A1 (en) * | 2010-03-05 | 2011-09-08 | Yuichi Tashiro | Electromagnetic type retarder |
| WO2011145423A1 (en) * | 2010-05-17 | 2011-11-24 | 日産自動車株式会社 | Control device for use in vehicle, adapted to control safety measures against electric power supply failure |
| CN106809020A (en) * | 2015-11-30 | 2017-06-09 | 北汽福田汽车股份有限公司 | auxiliary braking method, system and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109050500A (en) * | 2018-10-16 | 2018-12-21 | 杭叉集团股份有限公司 | A kind of fork truck braking control system and method |
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Application publication date: 20180123 |