CN110329224A - Emergency braking energy recycle device and control method based on gas type accumulator - Google Patents
Emergency braking energy recycle device and control method based on gas type accumulator Download PDFInfo
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- CN110329224A CN110329224A CN201910747034.XA CN201910747034A CN110329224A CN 110329224 A CN110329224 A CN 110329224A CN 201910747034 A CN201910747034 A CN 201910747034A CN 110329224 A CN110329224 A CN 110329224A
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- energy
- emergency braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/10—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels by utilising wheel movement for accumulating energy, e.g. driving air compressors
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Braking Arrangements (AREA)
Abstract
Emergency braking energy recycle device and control method based on gas type accumulator, belong to automobile energy-saving technical field, including drive axle, wheel angular acceleration sensor, central processing unit, generator, mechanical driving device, super capacitor C, pump/motor M2 and gas type accumulator, drive axle is connect with mechanical driving device and wheel angular acceleration sensor respectively；The output shaft of mechanical driving device and the input axis connection of generator；Super capacitor C is connect by circuit with the magnetic conduction circuitry in generator；The motor of pump/motor M2 is arranged in the magnetic induction return circuit of generator；Wheel angular acceleration sensor is connect with central processing unit signal input part, and the signal output end of central processing unit is connect with generator.The present invention can recycle rapidly the energy generated in the emergency braking short time, and highly reliable, reaction speed is fast, is capable of the emergency braking of fast reaction vehicle, avoid energy dissipation caused by recyclable device reaction not in time.
Description
Technical field
The invention belongs to automobile energy-saving technical field, consumed during especially relating to one kind and capable of recycling emergency braking
The device and control method of energy.
Background technique
With the development of economy, all energy consumption is too fast facing in the whole world, environment increasingly severe problem, wherein being used for
The energy consumption of running car is larger, and ratio is also being continuously improved.Estimated according to Ministry of Energy, the annual newly-increased automobile of institute will consume
70% or more of annual newly-increased oil production rate.
The current new technology of motor-dom --- automatic emergency brake system is used to avoid urgent collision accident, before being one kind
The very high emerging technology of scape.Automatic emergency brake system refers to vehicle normally travel, such as vehicle in the case where non-adaptive continuation of the journey
It encounters certain danger situation or front truck and when pedestrian's distance is less than safe distance is actively braked and (but has this function
Vehicle, which may not be able to stop completely vehicle, to stop) avoid or reduce the generations of the collision accidents such as knock into the back.Automatic emergency system at present
It is dynamic to be used on certain automobiles, such as Honda, Mazda etc., there is great practical value.However, braking emergency braking
It needs very high energy to keep the high pressure of brake fluid, a large amount of braking energy can be consumed in the process of implementation, to cause
Huge energy dissipation.
Summary of the invention
The technical problems to be solved by the present invention are: providing a kind of emergency braking energy regenerating based on gas type accumulator
Device and control method can recycle rapidly the energy generated in the emergency braking short time, and highly reliable, reaction speed is fast, energy
The emergency braking of enough fast reaction vehicles avoids energy dissipation caused by recyclable device reaction not in time.
Emergency braking energy recycle device based on gas type accumulator, it is characterized in that: including drive axle, the acceleration of wheel angle
Spend sensor, central processing unit, generator, mechanical driving device, super capacitor C, pump/motor M2 and gas type accumulation of energy
Device, the drive axle are connect with mechanical driving device and wheel angular acceleration sensor respectively；The mechanical driving device it is defeated
The input axis connection of shaft and generator；The super capacitor C is connect by circuit with the magnetic conduction circuitry in generator；It is described
The motor of pump/motor M2 is arranged in the magnetic induction return circuit of generator；The gas type accumulator and pump/motor M2
Connection；The wheel angular acceleration sensor is connect with central processing unit signal input part, and the signal of the central processing unit is defeated
Outlet and magnetic conduction circuitry switch K.
The gas type accumulator is bladder accumulator.
The central processing unit is four core, 64 central processing units of the valiant dragon 820A of high pass.
The kinetic energy of drive axle is converted mechanical energy by the mechanical driving device, and the generator is by mechanical driving device
Mechanical energy is converted to electric energy, mutual conversion of the pump/motor M2 for realizing mechanical energy and interior energy, the gas type storage
Energy device is used to store the next electric energy of generator conversion for storing interior energy, the super capacitor C.
The control method of emergency braking energy recycle device based on gas type accumulator, it is characterized in that: control is based on gas
The emergency braking energy recycle device of body formula accumulator carries out accumulation of energy, includes the following steps, and following steps sequentially carry out,
Step 1: automobile emergency brake, wheel angular acceleration is reduced, and wheel angular acceleration sensor records angle and accelerates letter
Breath, and pass to central processing unit；
Step 2: central processing unit judges that emergency braking condition, actual corners add by preset angular acceleration threshold value
Speed exceeds threshold value, and central processing unit issues emergency braking instruction, the switch K in generator magnetic conduction circuitry is disconnected, whole
Access closure, the electric current in circuit change, and pump/motor M2 accelerates rotation, and gas type accumulator is driven to store energy；
Actual angular acceleration is lower than threshold value, and central processing unit does not issue emergency braking and instructs, in generator magnetic conduction circuitry
Switch K remain closed, gas type accumulator does not store energy.
Through the above design, the present invention can be brought the following benefits: the urgent system based on gas type accumulator
Energy recyclable device and control method can recycle rapidly the energy generated in the emergency braking short time, highly reliable, reaction
Speed is fast, is capable of the emergency braking of fast reaction vehicle, avoids energy dissipation caused by recyclable device reaction not in time.
Further, the present invention is not against accurate mathematical formulae, and compared with electric energy storage, energy storage capacity is big, with flywheel and
Hydraulic accumulation energy is compared, and the electric energy generated when emergency braking can be quickly recycled, and structure is simple, is easily installed on various automobiles,
Strong applicability.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated:
Fig. 1 is that the present invention is based on the emergency braking energy recycle device structural schematic block diagrams of gas type accumulator.
Fig. 2 is that the present invention is based on the emergency braking energy recycle device generator magnetic induction return circuit circuits of gas type accumulator
Figure.
Fig. 3 is that the present invention is based on the signals of the emergency braking energy recycle device gas type accumulator structure of gas type accumulator
Figure.
Fig. 4 is that the present invention is based on tie after the compression of the emergency braking energy recycle device gas type accumulator of gas type accumulator
Structure schematic diagram.
Fig. 5 is that the present invention is based on the emergency braking energy recycle device gas type accumulator braking process of gas type accumulator
Energy conversion line figure.
1- drive axle, 2- wheel angular acceleration sensor, 3- central processing unit, 4- generator, 5- machine driving dress in figure
Set, 6- super capacitor C, 7- pump/motor M2,8- gas type accumulator, 9- flexible rubber air bag, 10- valve, 11- gas,
12- oil liquid, 13- fluid port.
Specific embodiment
Emergency braking energy recycle device based on gas type accumulator, as shown in Figure 1 and Figure 5, including drive axle 1, vehicle
Take turns angular acceleration transducer 2, central processing unit 3, generator 4, mechanical driving device 5, super capacitor C6, pump/motor M27
And gas type accumulator 8, the drive axle 1 have the kinetic energy of wheel, fill with wheel angular acceleration sensor 2 and machine driving
5 connections are set, kinetic energy when by automobile brake is converted into mechanical energy；The output shaft of the mechanical driving device 5 is defeated with generator 4
Enter axis connection, converts electric energy for mechanical energy；The super capacitor C6 is connected by the magnetic conduction circuitry in circuit and generator 4
It connects, realizes power storage；Mutual conversion of the pump/motor M27 for realizing mechanical energy and interior energy, pump/motor
The motor of M27 is arranged in the magnetic induction return circuit of generator 4, and the magnetic induction electromotive force that when emergency braking generates drives turning for pump
It is dynamic, realize the rotation of pump；The gas type accumulator 8 is connect with pump/motor M27, realizes quick accumulation of energy；The wheel angle
Acceleration transducer 2 is connect with 3 signal input part of central processing unit, the signal output end and generator 4 of the central processing unit 3
Connection.
Four core, 64 central processing units of the central processing unit 3 using the valiant dragon 820A of high pass, the framework of the processor, master
Frequency and 64 digits are better than other automobile central processors, have better performance.
The mechanical driving device 5 needs to bear high torque (HT) brought by emergency braking, and the present invention uses and is able to bear height
The mechanical driving device of torque.
The generator magnetic conduction circuitry is as described in Figure 2, and in figure, M1 is motor, and E represents induced electromotive force, and I is induced electricity
Stream, R1 are the equivalent resistance of current feedback circuit, and R2 is braking current-limiting resistance, and R3 is the internal resistance of armature, and D is diode.
The circuit of rightmost issues magnetic field to motor, and when automobile normal running, the switch K in Fig. 2 is closed, and turning circuit is a left side at this time
The closed loop circuit on side；When automobile emergency brake, angular speed of wheel sensor issues signal, is transmitted to central processing unit 3, centre
The control switch K again of device 3 is managed, K is disconnected, turning circuit is entire big closed loop circuit at this time.Since motor is magnetic induction part,
There is magnetic induction formula:
Wherein L is the inductance of armature.
When switch K is closed, i.e., when vehicle is not braked, induced field current are as follows:
When switch K is disconnected, i.e., when automobile starts emergency braking,Quickly increase, increases magnetic induction electromotive force rapidly
Greatly, as E > U, start to charge to system.
The gas type accumulator 8 is bladder accumulator, and as shown in Figure 3 and Figure 4, bladder accumulator is that basis wins her
What your gas law worked.Be made of intracapsular inert gas part and capsule outflow body portion, it is intermediate by flexible rubber air bag 9 every
It opens.Flexible rubber air bag 9 plays the role of gas-tight barrier and can change shapes and sizes.Liquid around air bag hydraulic oil
It is connected with external hydraulic circuit.Accumulator is filled with nitrogen by the valve 10 at top.When pump startup, accumulator will be charged to volume in advance
Constant-pressure.Poppet is usually stayed open by spring pressure, prevents air bag from squeezing out from fluid port 13.When the hydraulic height of accumulator
When pressure inside accumulator, gas 11 can compress, to store energy in compressed gas 11, and store around air bag
The oil liquid 12 of storage level (structure of bladder accumulator and the compression process of gas are as shown in Figure 3).Liquid outside accumulator
It forces down and forces oil to flow out from accumulator in the pressure compressed gas in accumulator, and consume gas when oil liquid 12 flows out, directly
Until the pressure in accumulator and the pressure outside accumulator are equal, to release energy.Since gas volume is in high pressure liquid
The lower speed changed of the pressure effect of pressure oil is very fast, can fast implement energy storage.When vehicle needs energy, accumulator release
Energy, and drive motor works, then energy is transformed into the component of needs.
The control method of emergency braking energy recycle device based on gas type accumulator, includes the following steps, and following
Step sequentially carries out,
Step 1: automobile emergency brake, wheel angular acceleration is reduced, and wheel angular acceleration sensor 2 records angle and accelerates letter
Breath, and pass to central processing unit 3；
Step 2: central processing unit 3 judges that emergency braking condition, actual corners add by preset angular acceleration threshold value
Speed exceeds threshold value, and central processing unit 3 issues emergency braking instruction, the switch K in 4 magnetic conduction circuitry of generator is disconnected, whole
Body access closure, the electric current in circuit change, and pump/motor M27 accelerates rotation, and gas type accumulator 8 is driven to store energy
Amount；
Actual angular acceleration is lower than threshold value, and central processing unit 3 does not issue emergency braking instruction, 4 magnetic conduction circuitry of generator
In switch K remain closed, gas type accumulator 8 does not store energy.
Wherein angular acceleration threshold value in the step 2 can choose the automobile that wheel overall diameter is 70cm, the angle of wheel
Acceleration is less than or equal to -20rad/s2When assert automobile carry out emergency braking.
The present invention uses the advantages of bladder accumulator to be, is quick on the draw, and can quickly recycle emergency braking moment biography
The huge energy passed, and the maximum volume of air bag is larger, can accommodate more gas, to store more interior energy.
It is to be swift in response using the advantageous combination of generator 4 and super capacitor C6, quickly recovery section can promptly makes
The raw energy of movable property.
When automobile needs to power, super capacitor C6 releases electric energy, realizes power supply.
Above-described embodiment is only technical solution of the present invention and thinking, and its object is to so that professional person is quickly understood
The contents of the present invention are simultaneously implemented accordingly, but it is not intended to limit the scope of the present invention.Anti- Spirit Essence according to the present invention
The equivalent change or modification done, should be covered by the protection scope of the present invention.
Claims (5)
1. the emergency braking energy recycle device based on gas type accumulator, it is characterized in that: adding including drive axle (1), wheel angle
Velocity sensor (2), central processing unit (3), generator (4), mechanical driving device (5), super capacitor C (6), variable pump/horse
Up to M2 (7) and gas type accumulator (8), the drive axle (1) passes with mechanical driving device (5) and wheel angular acceleration respectively
Sensor (2) connection；The output shaft of the mechanical driving device (5) and the input axis connection of generator (4)；The super capacitor C
(6) it is connect by circuit with the magnetic conduction circuitry in generator (4)；The motor setting of the pump/motor M2 (7) is generating electricity
In the magnetic induction return circuit of machine (4)；The gas type accumulator (8) connect with pump/motor M2 (7)；The wheel angle accelerates
Degree sensor (2) is connect with central processing unit (3) signal input part, and the signal output end of the central processing unit (3) controls magnetic
Switch of induction circuit K.
2. gas type accumulator emergency braking energy Rapid recovery device according to claim 1, it is characterized in that: the gas
Body formula accumulator (8) is bladder accumulator.
3. gas type accumulator emergency braking energy Rapid recovery device according to claim 1, it is characterized in that: in described
Central processor (3) is four core, 64 central processing units of the valiant dragon 820A of high pass.
4. gas type accumulator emergency braking energy Rapid recovery device according to claim 1, it is characterized in that: the machine
The kinetic energy of drive axle (1) is converted mechanical energy by tool transmission device (5), and the generator (4) is by the machine of mechanical driving device (5)
Tool can be converted to electric energy, mutual conversion of the pump/motor M2 (7) for realizing mechanical energy and interior energy, the gas type
Accumulator (8) is used to store the electric energy that generator (4) conversion comes for storing interior energy, the super capacitor C (6).
5. the control method of the emergency braking energy recycle device based on gas type accumulator, it is characterized in that: control is based on gas
The emergency braking energy recycle device of formula accumulator carries out accumulation of energy, includes the following steps, and following steps sequentially carry out,
Step 1: automobile emergency brake, wheel angular acceleration is reduced, and wheel angular acceleration sensor (2) records angle and accelerates information,
And pass to central processing unit (3)；
Step 2: central processing unit (3) judges that emergency braking condition, actual corners accelerate by preset angular acceleration threshold value
Degree exceeds threshold value, and central processing unit (3) issues emergency braking instruction, the switch K in generator (4) magnetic conduction circuitry is disconnected,
Whole access closure, the electric current in circuit change, and pump/motor M2 (7) accelerates rotation, drives gas type accumulator (8)
Store energy；
Actual angular acceleration is lower than threshold value, and central processing unit (3) does not issue emergency braking instruction, generator (4) magnetic conduction circuitry
In switch K remain closed, gas type accumulator (8) does not store energy.
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