CN107215213A - A kind of commercial car electric power-assisted braking system and its method - Google Patents
A kind of commercial car electric power-assisted braking system and its method Download PDFInfo
- Publication number
- CN107215213A CN107215213A CN201710323798.7A CN201710323798A CN107215213A CN 107215213 A CN107215213 A CN 107215213A CN 201710323798 A CN201710323798 A CN 201710323798A CN 107215213 A CN107215213 A CN 107215213A
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- Prior art keywords
- braking
- engine
- energy storage
- storage device
- resistor
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/22—Dynamic electric resistor braking, combined with dynamic electric regenerative braking
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a kind of commercial car electric power-assisted braking system and its method, EBA includes motor and its controller, and braking resistor, energy storage device；The electric energy that the motor is produced during regenerative braking is charged by controller to energy storage device, or is consumed by braking resistor.Commercial car electric power-assisted braking system provided by the present invention, when vehicle is in ramp climb and fall, selects different auxiliary braking schemes according to the difference of speed, effectively raises brake efficiency stability, it is ensured that the operation stability and driving safety of vehicle.The present invention also optimizes the layout of braking resistor cooling device, increases bypass on engine-cooling system, improves the free degree of system; under low speed descending operating mode when not needing engine braking; engine is shut down, and only realizes the purpose of energy-conservation to a certain extent with motor come auxiliary braking.
Description
Technical field
The present invention relates to commerial vehicle, the electric power-assisted braking system of more particularly to big-and-middle-sized commerial vehicle, to solve
Vehicle reduces the working frequency of service braking system, effectively improves the stability of brake efficiency in lower long slope sections of road, protects
Demonstrate,prove the operation safety of vehicle.
Background technology
As the Hyundai Motor speed of service is more and more faster, the brake load of automobile is also increasing, is particularly frequently stopping
On the local bus of car, mountain area running automobile upper and lower long slope when, the problem of brake load is excessive more protrudes.If these
Brake load is all undertaken by service braking system, will result in braking（Disk）Drum and brake strip overheat, so as to cause
Brake efficiency declines, or even stopping power is wholly absent；And then cause brake strip and braking（Disk）Bulging service life is big
Big to shorten so that the use cost of automobile rises, maintenance load is increased.To solve the problem, install auxiliary additional on full-sized car
Help brakes.
In addition, the ramp of hill path local highway, bend are more, the section in special lower long slope road is more, thus above mentioned problem exists
It is especially prominent in commercial car.
To solve this problem, the 6m of extra large lattice bus coating and long above car are configured with EBA, including hair
Motivation exhaust brake, current vortex retarder are so that extra large lattice car keeps the speed of stabilization in lower long slope and improves traffic safety
Property.Solution for the complemental brake system of vehicle mainly has following several forms：
Engine braking：Fuel is supplied to the engine stop of automobile in traveling, and speed changer is linked into a certain drive shift, makes vapour
Car is able to drive engine crankshaft to continue to rotate by driving wheel and power train.So, engine reforms into consumption automobile kinetic energy
So as to play the air compressor of retarded acting to automobile.In this case, the kinetic energy that automobile is inputted to engine largely consumes
Damage in air inlet in machine, compression, exhaust process, fraction is consumed in annexes such as water pump, oil pump, air compressor machine, generators
In driving.Engine and above-mentioned each annex hinder the torque of bent axle rotation to be braking moment, are passed after being amplified by power train
To driving wheel.
Engine exhaust auxiliary braking：Large-sized diesel motor vehicle uses engine in lower long slope or Reduced Speed Now
Exhaust brake is as complemental brake system, generally by the exhaust brake switch manipulated in driver's cabin, controls to send out by air pressure
Motivation exhaust butterfly valve, and then control the exhaust realization of engine.If during exhaust brake were implemented, greater engine oil
Door carries out gear shift to speed changer, and engine so may not only reach vehicle deceleration because exhaust is not smooth and stops working
Purpose, and service brake energy supply air pump and by engine provide power steering pump because engine misses can not work
Make, influence the safety of driving.
Current vortex retarder：Current vortex retarder is made up of the disk rotated and the magnetic pole of fixation, coil.Coil is being powered
After produce magnetic field, because disk is rotated in this magnetic field, therefore there is current vortex to flow through, current vortex and magnetic field interphase interaction production
Raw braking moment.The heat wherein produced with current vortex is dispersed into air by the fin being installed on disk.Current vortex
Retarder is usually used on motorbus.
Retarder：The size of its braking moment depend on working chamber in oil pressure and oil mass, and rotor rotating speed.
When automobile downhill, automobile is slided under gravity, the rotor of Retarder is run at high speed.Retarder it is main
Part is fixed impeller and rotary blade, is typically mounted at speed changer.When automobile needs slow, automobile by drive axle and
The anti-rotary blade with Retarder such as speed changer is rotated, and fixed impeller produces resistance by the liquid of flowing to rotary blade
Square, makes automobile slow.
Traction motor retarder：When electrically-driven automobile needs slow, traction motor can be changed to generator,
The traveling kinetic energy of automobile is changed into electric energy., can be electronic to the traction in powered wheel for the automobile using electric transmission
Machine is stopped power supply, and is allowed to wheel drive driven and as generator, the part kinetic energy of automobile is transformed into electric energy, then be run through
Electric resistance changing dissipates for heat energy.At this moment motor is braking moment to the moment of resistance of driving wheel.
Electrified retarding device on Heavy Duty Commercial Car, although have Patents elaboration, but not to slow mechanism side
The detailed description of case.Therefore, patent of the present invention proposes a kind of effective solution and control method.
The content of the invention
The present invention seeks to：A kind of solution of commercial car electric power-assisted braking system is provided, is commercial car in ramp
It is upper that sufficient brake force is provided, improve brake efficiency, it is ensured that the operation stability and driving safety of vehicle.
The technical scheme is that：
Electrification innovation is carried out to vehicle, for traditional motor-powered vehicle, increases electric power-assisted braking system, bag
Include motor and controller, braking resistor, cooling device and its control element.For electric automobile, if capacity compared with
Big battery, then can not do corresponding transformation.For fast charging type battery, because battery capacity is smaller, then it can be increased according to actual conditions
Plus braking resistor.For hybrid vehicle, increase braking resistor, cooling device and its control element.In addition, optimization system
The layout of dynamic resistance cooling device, increases bypass on engine-cooling system, improves the free degree of system, low speed descending work
Under condition when not needing engine braking, engine is shut down, and only realizes section to a certain extent with motor come auxiliary braking
The purpose of energy, it is specific as follows.
A kind of commercial car electric power-assisted braking system, as the servicing unit of vehicle engine braking system, including it is electronic
Machine and its controller, and braking resistor, energy storage device；The electric energy that the motor is produced during regenerative braking passes through control
Device charges to energy storage device, or is consumed by braking resistor.
It is preferred that, the braking resistor is connected with cooling device.Engine-cooling system of the cooling device in vehicle
Upper increase bypass, makes engine coolant flow through braking resistor.
It is preferred that, it is connected with an Electrocontrolled tee valve, the automatically controlled threeway on the water pipe for the coolant for connecting braking resistor
The first interface of valve connects the water channel of engine by engine radiator, and second interface directly connects braking resistor, and the 3rd connects
Mouth passes through an electric water pump and connects braking resistor, and the braking resistor other end connects the water channel of engine.
It is preferred that, the engine radiator is additionally provided with cooling fan, for being cooled down to radiator.
The braking method of commercial car electric power-assisted braking system：Including high speed braking mode and low speed braking mode；Wherein：
High speed braking mode：When engine speed is more than particular value, engine braking brakes collective effect, system with motor feedback
Dynamic resistance shares cooling recirculation system with engine；
Low speed braking mode：When engine speed is less than particular value, braked only with motor feedback, engine is shut down, braking
Resistance uses electric water pump circulating cooling.
It is preferred that, under high speed braking mode, also judge the state-of-charge of energy storage device：
When energy storage device is fully charged, engine braking brakes collective effect with motor feedback, and motor feedback braking is produced
Electric energy consumed by braking resistor；
When energy storage device underfill is electric, preferential using motor feedback braking, the electrical power storage that regenerative braking is produced is in energy storage
In device, engine is shut down, and braking resistor does not work；In addition, when braking energy is more than motor feedback stopping power, starting
Mechanism is dynamic to brake collective effect with motor feedback, and the electrical power storage that regenerative braking is produced is in energy storage device, and braking resistor is not
Work.
It is preferred that, under low speed braking mode, also judge the state-of-charge of energy storage device：
When energy storage device is fully charged, motor feedback is taken to brake, the electric energy that regenerative braking is produced is consumed by braking resistor,
Engine is shut down；When energy storage device underfill is electric, braked using motor feedback, the electrical power storage that regenerative braking is produced is in storage
In energy device, engine is shut down, and braking resistor does not work.
It is an advantage of the invention that：
1. commercial car electric power-assisted braking system provided by the present invention, when vehicle is in ramp climb and fall, according to speed not
Different auxiliary braking schemes are selected together, brake efficiency stability are effectively raised, it is ensured that the operation stability of vehicle
With driving safety.
2. the present invention also optimizes the layout of braking resistor cooling device, increase bypass on engine-cooling system, carry
Under the high free degree of system, low speed descending operating mode when not needing engine braking, engine is shut down, only with motor come auxiliary
Braking is helped, the purpose of energy-conservation is realized to a certain extent.
3. the electric energy that motor of the present invention is produced during regenerative braking is charged by controller to energy storage device,
In the case that energy storage device is fully charged, just consumed, saved thrifty by braking resistor.
Brief description of the drawings
Below in conjunction with the accompanying drawings and embodiment the invention will be further described：
Fig. 1 is the structural representation of electric power-assisted braking system of the present invention；
Fig. 2 is the control flow chart of electric power-assisted braking system of the present invention.
Embodiment
As shown in figure 1, disclosed commercial car electric power-assisted braking system, is used as vehicle engine braking system
Servicing unit, including motor and its controller, and braking resistor, energy storage device；The controller is opened by automatically controlled respectively
Close K1, K2 and connect braking resistor and the energy-storage travelling wave tube to energy storage device.
Increase bypass on the engine-cooling system of vehicle, engine coolant is flowed through braking resistor.Connect braking
An Electrocontrolled tee valve is connected with the water pipe of the coolant of resistance, the interface 1 of the Electrocontrolled tee valve passes through engine radiating
Device connects the water channel of engine, and interface 3 connects braking resistor by an electric water pump, and interface 2 directly connects braking resistor, brakes
The resistance other end connects the water channel of engine.The engine radiator is additionally provided with cooling fan, cold for being carried out to radiator
But.
The control strategy using electric power-assisted braking system of the present invention is described in detail with reference to Fig. 2：
Running status first to vehicle judges, when vehicle is in damped condition, engine speed is sentenced first
It is disconnected, it is divided into braking at a high speed and low speed brakes both of which.
When rotating speed is more than particular value L, the state-of-charge of energy storage device is judged.When energy storage device is fully charged, hair is taken
Motivation brake with motor feedback brake method, regenerative braking produce electric energy consumed by braking resistor, braking resistor with
Engine shares cooling recirculation system, Electrocontrolled tee valve 1 now in Fig. 1,2 interface UNICOMs, and electric-controlled switch K1 is connected, and K2 breaks
Open.When energy storage device underfill is electric, the preferential method braked using motor feedback, the electrical power storage that regenerative braking is produced in
In energy storage device, engine is shut down, and braking resistor does not work, and electric-controlled switch K1 disconnects, and K2 is connected；In addition, when braking energy is big
When motor feedback stopping power, engine braking brakes collective effect, the electric energy that regenerative braking is produced with motor feedback
It is stored in energy storage device, braking resistor does not work, electric-controlled switch K1 disconnects, K2 is connected.
When rotating speed is less than particular value L, the state-of-charge of energy storage device is judged.When energy storage device is fully charged, electricity is taken
The method of motivation regenerative braking, the electric energy that regenerative braking is produced is consumed by braking resistor, and engine is shut down, and braking resistor is used
Electric water pump circulating cooling, Electrocontrolled tee valve 1 now in Fig. 1,3 interface UNICOMs, electric-controlled switch K1 is connected, and K2 disconnects.Work as storage
Can device underfill it is electric when, the method braked using motor feedback, the electrical power storage that regenerative braking is produced in energy storage device,
Engine is shut down, and braking resistor does not work, and electric-controlled switch K1 disconnects, and K2 is connected.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Present disclosure can be understood and implemented according to this, it is not intended to limit the scope of the present invention.It is all main according to the present invention
The modification for wanting the Spirit Essence of technical scheme to be done, should all be included within the scope of the present invention.
Claims (8)
1. a kind of commercial car electric power-assisted braking system, is used as the servicing unit of vehicle engine braking system, it is characterised in that
Including motor and its controller, and braking resistor, energy storage device；The electric energy that the motor is produced during regenerative braking
Charged, or consumed by braking resistor to energy storage device by controller.
2. commercial car electric power-assisted braking system according to claim 1, it is characterised in that the braking resistor is connected with
Cooling device.
3. commercial car electric power-assisted braking system according to claim 2, it is characterised in that the cooling device is in vehicle
Engine-cooling system on increase bypass, engine coolant is flowed through braking resistor.
4. commercial car electric power-assisted braking system according to claim 3, it is characterised in that connect the cooling of braking resistor
An Electrocontrolled tee valve is connected with the water pipe of liquid, the first interface of the Electrocontrolled tee valve is connected by engine radiator to be sent out
The water channel of motivation, second interface directly connects braking resistor, and the 3rd interface connects braking resistor, braking electricity by an electric water pump
Hinder the water channel that the other end connects engine.
5. commercial car electric power-assisted braking system according to claim 4, it is characterised in that the engine radiator is also
Provided with cooling fan, for being cooled down to radiator.
6. a kind of braking method of commercial car electric power-assisted braking system, it is characterised in that including high speed braking mode and low speed
Braking mode；Wherein,
High speed braking mode：When engine speed is more than particular value, engine braking brakes collective effect, system with motor feedback
Dynamic resistance shares cooling recirculation system with engine；
Low speed braking mode：When engine speed is less than particular value, braked only with motor feedback, engine is shut down, braking
Resistance uses electric water pump circulating cooling.
7. the braking method of commercial car electric power-assisted braking system according to claim 6, it is characterised in that made in high speed
Under dynamic model formula, the state-of-charge of energy storage device is also judged：
When energy storage device is fully charged, engine braking brakes collective effect with motor feedback, and motor feedback braking is produced
Electric energy consumed by braking resistor；
When energy storage device underfill is electric, preferential using motor feedback braking, the electrical power storage that regenerative braking is produced is in energy storage
In device, engine is shut down, and braking resistor does not work；In addition, when braking energy is more than motor feedback stopping power, starting
Mechanism is dynamic to brake collective effect with motor feedback, and the electrical power storage that regenerative braking is produced is in energy storage device, and braking resistor is not
Work.
8. the braking method of commercial car electric power-assisted braking system according to claim 6, it is characterised in that in low speed system
Under dynamic model formula, the state-of-charge of energy storage device is also judged：
When energy storage device is fully charged, motor feedback is taken to brake, the electric energy that regenerative braking is produced is consumed by braking resistor,
Engine is shut down；When energy storage device underfill is electric, braked using motor feedback, the electrical power storage that regenerative braking is produced is in storage
In energy device, engine is shut down, and braking resistor does not work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710323798.7A CN107215213A (en) | 2017-05-10 | 2017-05-10 | A kind of commercial car electric power-assisted braking system and its method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710323798.7A CN107215213A (en) | 2017-05-10 | 2017-05-10 | A kind of commercial car electric power-assisted braking system and its method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108749587A (en) * | 2018-04-26 | 2018-11-06 | 谭震 | A kind of intelligent electrodynamic device |
| CN110605967A (en) * | 2019-09-29 | 2019-12-24 | 潍柴动力股份有限公司 | Auxiliary braking control method and device for heavy-duty car |
| CN111834071A (en) * | 2020-04-26 | 2020-10-27 | 东风商用车有限公司 | Liquid cooling type brake resistor system for vehicle |
| CN111845361A (en) * | 2020-04-26 | 2020-10-30 | 东风商用车有限公司 | Liquid cooling type vehicle brake resistor system |
| CN112051065A (en) * | 2020-08-19 | 2020-12-08 | 中国第一汽车股份有限公司 | Engine brake system testing method |
| CN112693300A (en) * | 2020-12-28 | 2021-04-23 | 泰安航天特种车有限公司 | Cooling system and cooling method shared by brake resistor and engine of hybrid electric vehicle |
| CN114274785A (en) * | 2021-12-15 | 2022-04-05 | 无锡江南智造科技股份有限公司 | Control system and control method for long-distance continuous downhill braking in automatic driving |
| WO2022214190A1 (en) * | 2021-04-08 | 2022-10-13 | Volvo Truck Corporation | Methods and devices for braking of a heavy-duty vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108749587A (en) * | 2018-04-26 | 2018-11-06 | 谭震 | A kind of intelligent electrodynamic device |
| CN110605967A (en) * | 2019-09-29 | 2019-12-24 | 潍柴动力股份有限公司 | Auxiliary braking control method and device for heavy-duty car |
| CN110605967B (en) * | 2019-09-29 | 2021-04-16 | 潍柴动力股份有限公司 | Auxiliary braking control method and device for heavy-duty car |
| CN111834071A (en) * | 2020-04-26 | 2020-10-27 | 东风商用车有限公司 | Liquid cooling type brake resistor system for vehicle |
| CN111845361A (en) * | 2020-04-26 | 2020-10-30 | 东风商用车有限公司 | Liquid cooling type vehicle brake resistor system |
| CN112051065A (en) * | 2020-08-19 | 2020-12-08 | 中国第一汽车股份有限公司 | Engine brake system testing method |
| CN112693300A (en) * | 2020-12-28 | 2021-04-23 | 泰安航天特种车有限公司 | Cooling system and cooling method shared by brake resistor and engine of hybrid electric vehicle |
| WO2022214190A1 (en) * | 2021-04-08 | 2022-10-13 | Volvo Truck Corporation | Methods and devices for braking of a heavy-duty vehicle |
| CN114274785A (en) * | 2021-12-15 | 2022-04-05 | 无锡江南智造科技股份有限公司 | Control system and control method for long-distance continuous downhill braking in automatic driving |
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Application publication date: 20170929 |