CN108248599A - Hydraulic hybrid regeneration brake system and control method based on double accumulators - Google Patents
Hydraulic hybrid regeneration brake system and control method based on double accumulators Download PDFInfo
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- CN108248599A CN108248599A CN201810103164.5A CN201810103164A CN108248599A CN 108248599 A CN108248599 A CN 108248599A CN 201810103164 A CN201810103164 A CN 201810103164A CN 108248599 A CN108248599 A CN 108248599A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/18—Braking system
Abstract
The present invention provides hydraulic hybrid regeneration brake systems and control method based on double accumulators, belong to Development of HEV Technology field, including：Brake unit includes hydraulic regenerative braking unit and mechanical braking unit, hydraulic regenerative braking unit includes the first high pressure accumulator, second high pressure accumulator, throttle valve, check valve, two-bit triplet solenoid directional control valve, secondary component hydraulic pump/motor, overflow valve and low pressure accumulator, power unit includes main reducing gear, electromagnetic clutch, torsion coupler, gearbox and engine, control unit includes controller, accelerator pedal angular displacement sensor, brake pedal angular displacement sensor, energy storage pressure sensor, Engine ECU, velocity sensor and secondary component hydraulic pump/motor pressure sensor.The device effectively improves hydraulic regenerative braking unit style and is short of power the short slab low with energy recovery rate, the torque of reasonable distribution engine and the torque of hydraulic regenerative braking unit, and engine is made to be operated in high efficient district.
Description
Technical field
The invention belongs to Development of HEV Technology fields, and in particular to a kind of hydraulic hybrid based on double accumulators
Regeneration brake system and control method.
Background technology
Liquid-driving mixed power automobile is mainly made of a set of conventional power system plus hydraulic power system, and hydraulic pump is hair
The hydraulic energy that motivation and regeneration brake system generate is stored in high pressure accumulator.It starts to walk and accelerates the two oil consumptions highest
Stage discharges the energy in high pressure accumulator, hydraulic motor assisted engine is pushed to be driven using hydraulic oil.During braking,
Braking energy is recovered to by hydraulic pump in high pressure accumulator, in case being used during driving.
The hydraulic braking energy-recuperation system of domestic and international mainstream is to employ a single high pressure accumulator recycling system
Energy.Using the parallel-connection type hybrid power vehicle of preceding single high pressure accumulator, energy recovery rate is not high, and in damped condition
Under more urgent operating mode, hydraulic braking effect is bad, influences the safety of running car, it is impossible to take into account braking characteristic and energy returns
Yield.
Invention content
In order to overcome above-mentioned the shortcomings of the prior art, the present invention provides a kind of hydraulic hybrids based on double accumulators
Power regenerating braking system.
To achieve these goals, the present invention provides following technical solution：
Hydraulic hybrid regeneration brake system based on double accumulators, it is single including brake unit, power unit and control
Member；
The brake unit includes hydraulic regenerative braking unit and mechanical braking unit；
The hydraulic regenerative braking unit include the first high pressure accumulator, the second high pressure accumulator, throttle valve, check valve,
Two-bit triplet solenoid directional control valve, secondary component hydraulic pump/motor, overflow valve and low pressure accumulator, the low pressure accumulator and institute
The oil inlet of oil inlet and the overflow valve for stating secondary component hydraulic pump/motor is connected, the two-bit triplet solenoid directional control valve
A mouths be connected with the oil outlet of the secondary component hydraulic pump/motor and the oil outlet of the overflow valve, two-bit triplet electricity
The P mouths of magnetic reversal valve are connected with the entrance of the check valve, the T mouths of the two-bit triplet solenoid directional control valve and the check valve
Outlet is connected to first high pressure accumulator and the second high pressure accumulator by pipeline by the throttle valve；
The mechanical braking unit includes electric Proportion valve, main brake valve, air accumulator, air compressor and motor, described
Motor drives air compressor rotation, by high pressure gas storage there are in the air accumulator, the air accumulator and the main system
Dynamic valve connection, the outlet of the main brake valve connects the brake caliper of nonpowered axle and the electrical ratio respectively by pipeline
Valve, the brake caliper of the electric Proportion valve port of export connection drive shaft；
The power unit includes main reducing gear, electromagnetic clutch, torsion coupler, gearbox and engine, the hair
The power that motivation generates passes to the input shaft of the gearbox, and the power that the output shaft of the gearbox generates passes to described
First transmission shaft of torsion coupler, the power that the secondary component hydraulic pump/motor generates are passed by the electromagnetic clutch
The second driving shaft of the torsion coupler is passed, the power of the second driving shaft generation of the torsion coupler is via described turn
First transmission shaft of square coupler passes to the main reducing gear driving wheels travel；
Described control unit includes controller, accelerator pedal angular displacement sensor, brake pedal angular displacement sensor, accumulation of energy
Device pressure sensor, Engine ECU, velocity sensor and secondary component hydraulic pump/motor pressure sensor, the accumulator pressure
Force snesor is mounted on the connecting line of first high pressure accumulator and the second high pressure accumulator and the throttle valve, described
Velocity sensor is mounted on nonpowered axle, and the secondary component hydraulic pump/motor pressure sensor is mounted on the Quadratic Finite Element
On the connecting line of part hydraulic pump/motor and the two-bit triplet solenoid directional control valve.
Preferably, the controller is internally provided with data acquisition module, data processing module and execution module；
The detection signal of each sensor of data acquisition module real-time reception, and detection signal is sent to the data
Processing module；
The data processing module receives the detection signal and it is handled to obtain processing signal, is believed according to processing
Number send out control command to the execution module；
The execution module receives the control command that the data processing module is sent, according to control strategy by control command
Independent passes to controlled device.
Preferably, the accelerator pedal angular displacement sensor, brake pedal angular displacement sensor, energy storage pressure sensing
Device, velocity sensor, secondary component hydraulic pump/motor pressure sensor, the data of engine, gearbox with the controller
Acquisition module is electrically connected；
The throttle valve, two-bit triplet solenoid directional control valve, secondary component hydraulic pump/motor, electromagnetic clutch, engine
The execution module of ECU, electric Proportion valve, main brake valve with the controller is electrically connected；
The Engine ECU starts mechatronics with described.
Preferably, the accumulation of energy amount of first high pressure accumulator is more than the accumulation of energy amount of second high pressure accumulator.
Another object of the present invention is to provide a kind of hydraulic hybrid regeneration brake system control based on double accumulators
Method processed, includes the following steps：
Step 1：When automobilism, controller receives accelerator pedal angular displacement sensor and brake pedal angular displacement at any time
The angular displacement signal that sensor passes come by the calculating of the controller, obtains accelerator opening angle signal and braking is stepped on
Plate opening amount signal judges the operating mode of automobile at this time according to the accelerator opening angle signal and brake pedal opening amount signal, specifically
Rule of judgment represents as follows：
For 1a. when the accelerator opening angle signal is more than 0, the controller judges that automobile is in driving operating mode at this time,
And send out control command and so that throttle valve is fully open, the A mouths of two-bit triplet solenoid directional control valve are connected with T mouthfuls, P mouthfuls of closings, this
Shi Suoshu controllers are judged according to the aperture of accelerator pedal, and receive the tach signal that Engine ECU passes over, and are passed through
The map figures of engine calculate the torque of the engine output at this time and engine power at this time, judge the hair at this time
Whether motivation is operated in high efficient district, if being operated in high efficient district, electromagnetic clutch disconnects, and the engine independently drives vehicle at this time
, if the engine does not operate at high efficient district at this time, judge the engine be operated in low-speed high-torque state or
High speed low torque state；
If the engine is operated in low-speed high-torque state to 1b. at this time, the electromagnetic clutch combines, the control at this time
Device processed according to the pressure signal of the secondary component hydraulic pump/motor pressure sensor of reception judge the secondary component hydraulic pump/
The pressure at motor both ends, if the pressure at the secondary component hydraulic pump/motor both ends is higher than hydraulic regenerative braking unit at this time
Minimum operating pressure, then hydraulic regenerative braking unit and engine joint drive vehicle at this time, start described in adjustment at this time
Machine is operated in best operating point, and hydraulic regenerative braking unit does power supplement, ensures the normally travel of automobile；
If the engine is operated in high speed low torque state to 1c. at this time, the electromagnetic clutch combines, the control at this time
Device processed according to the pressure signal of the secondary component hydraulic pump/motor pressure sensor of reception judge the secondary component hydraulic pump/
The pressure at motor both ends, if the pressure at the secondary component hydraulic pump/motor both ends is higher than hydraulic regenerative braking unit energy at this time
The minimum pressure of enough independent driving vehicles, then the engine does not work at this time, and hydraulic regenerative braking unit, which works independently, to be driven
Vehicle；If the pressure at the secondary component hydraulic pump/motor both ends independently drives vehicle less than hydraulic regenerative braking unit at this time
Minimum pressure, then the engine independently drives vehicle at this time, and the power that the engine is had more than needed will be used for filling for accumulator
Energy；
Step 2：When the brake pedal opening amount signal, that is, severity of braking is more than 0, the controller judges that automobile is in
Braking deceleration operating mode, and send out control command and cause the A mouths of two three-way solenoid valves and P mouthful connections, T mouthfuls are closed,
Specific Rule of judgment represents as follows；
For 2a. as the severity of braking z ＞ 0.7, the controller judges that damped condition is emergency braking operating mode at this time, and
It sends out control command and causes the electromagnetic clutch disconnection, electric Proportion valve standard-sized sheet, at this time in order to ensure braking system safety,
Hydraulic regenerative braking unit is no longer participate in work, and mechanical braking unit provides whole braking torques, and the controller is according at this time
Severity of braking adjust main brake valve (16) aperture braked, do not recycle braking energy at this time；
As the severity of braking z≤0.7, the electromagnetic clutch combines 2b., and the controller receives the first high pressure and stores
Energy storage pressure cell pressure signal on energy device pipeline according to the discharge capacity of the secondary component hydraulic pump/motor, calculates
Go out the renewable brake force of maximum that hydraulic regenerative braking unit at this time can provide, and with braking required braking under severity of braking herein
Torque is compared, if renewable brake force disclosure satisfy that brake request at this time, the controller is judged as light brake work
Condition, the electric Proportion valve and main brake valve are closed, and the throttle valve being connect with first high pressure accumulator is opened, high with second
The throttle valve of accumulator connection is pressed to close, braking energy is recycled by first high pressure accumulator at this time, mechanical braking unit is not
Participate in work；If it is impossible to meet brake requests for the renewable braking torque that the second high pressure accumulator at this time provides, described
Controller judges damped condition at this time as moderate damped condition, and the throttle valve being connect with second high pressure accumulator is opened,
The throttle valve being connect with first high pressure accumulator is closed, and recycles braking energy by second high pressure accumulator at this time, most
Limits use hydraulic regenerative braking unit, are calculated by the controller, by the aperture for adjusting the electric Proportion valve
It adjusts the ratio of mechanical braking force and renewable brake force, recycles braking energy to greatest extent.
Preferably, the brake unit is braked using the optimal energy reclaiming based on line control brake system technology
Take-back strategy, optimal energy take-back strategy turn to target with Brake energy recovery maximum, change the mechanical braking force on driving wheel,
The mechanical braking force on non-driving wheel is not changed；In light brake, using pure regenerative braking on driving wheel, at this time by described the
One high pressure accumulator recycles braking energy；Composite braking is used when moderate is braked, in composite braking, on driving wheel to greatest extent
Performance regenerative braking force, brake hypodynamic part and supplemented by mechanical braking unit, at this time by second high pressure accumulator
Recycle braking energy；In emergency braking, to ensure the safety of braking, hydraulic regenerative braking unit is not involved in work, brakes
Power is all provided by mechanical braking unit.
Hydraulic hybrid regeneration brake system and control method provided by the invention based on double accumulators have following
Advantageous effect：
(1) hydraulic regenerative braking unit style is effectively improved to be short of power the short slab low with energy recovery rate；Reasonable distribution
The torque of engine and the torque of hydraulic regenerative braking unit, make engine be operated in high efficient district；
(2) add-assembly is simple, it is only necessary to a set of hydraulic regenerative braking unit is installed on orthodox car, is not changed
Former vehicle brake piping, cost are relatively low；
(3) automobile power is obviously improved and reduces oil consumption and discharge；
(4) after hydraulic regenerative braking thrashing, tradition machinery brake unit can be continuing with, and be ensured in braking process
Safety and stability；
(5) system noise is small, has been truly realized energy conservation and environmental protection, free from environmental pollution.
Description of the drawings
Fig. 1 is the structural representation of the hydraulic hybrid regeneration brake system based on double accumulators of the embodiment of the present invention 1
Figure；
Fig. 2 is the hydraulic hybrid regeneration brake system control method based on double accumulators of the embodiment of the present invention 1
Drive control strategy block diagram；
Fig. 3 is the hydraulic hybrid regeneration brake system control method based on double accumulators of the embodiment of the present invention 1
Control strategy block diagram during braking.
Specific embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the present invention is further described.Following embodiment is only used for more
Technical scheme of the present invention is clearly demonstrated, and is not intended to limit the protection scope of the present invention and limits the scope of the invention.
Embodiment 1
The present invention provides a kind of hydraulic hybrid regeneration brake system based on double accumulators, specifically such as Fig. 1 institutes
Show, including brake unit, power unit and control unit；
Brake unit includes hydraulic regenerative braking unit and mechanical braking unit；
Hydraulic regenerative braking unit include the first high pressure accumulator 4, the second high pressure accumulator 5, throttle valve 7, check valve 8,
Two-bit triplet solenoid directional control valve 9, secondary component hydraulic pump/motor 10, overflow valve 11 and low pressure accumulator 20, low pressure accumulator 20
It is connected with the oil inlet of secondary component hydraulic pump/motor 10 and the oil inlet of overflow valve 11, the A of two-bit triplet solenoid directional control valve 9
Mouth is connected with the oil outlet of secondary component hydraulic pump/motor 10 and the oil outlet of overflow valve 11, two-bit triplet solenoid directional control valve 9
P mouthfuls are connected with the entrance of check valve 8, and the outlet of the T mouths and check valve 8 of two-bit triplet solenoid directional control valve 9 is by pipeline by section
Stream valve 7 is connected to the first high pressure accumulator 4 and the second high pressure accumulator 5；
Mechanical braking unit includes electric Proportion valve 15, main brake valve 16, air accumulator 17, air compressor 18 and motor
19, motor 19 is rotated with engine-driven air compressor 18, by high pressure gas storage there are in air accumulator 17, air accumulator 17 and main brake valve
16 connections, the outlet of main brake valve 16 connect the brake caliper 26 of nonpowered axle and electric Proportion valve 15 respectively by pipeline, electricity
15 port of export of gas proportioning valve connects the brake caliper 27 of drive shaft；
Power unit includes main reducing gear 12, electromagnetic clutch 13, torsion coupler 14, gearbox 22 and engine 23,
The power that engine 23 generates passes to the input shaft of gearbox 22, and the power that the output shaft of gearbox 22 generates passes to torque
First transmission shaft of coupler 14, the power that secondary component hydraulic pump/motor 10 generates is passed to by electromagnetic clutch 13 to be turned
The second driving shaft of square coupler 14, the power that the second driving shaft of torsion coupler 14 generates is via the of torsion coupler 14
One transmission shaft passes to main reducing gear 12 and drives wheels travel；
Control unit includes controller 1, accelerator pedal angular displacement sensor 2, brake pedal angular displacement sensor 3, accumulation of energy
Device pressure sensor 6, Engine ECU 21, velocity sensor 24 and secondary component hydraulic pump/motor pressure sensor 25, accumulation of energy
Device pressure sensor 6 is mounted on the first high pressure accumulator 4 and the connecting line of the second high pressure accumulator 5 and throttle valve 7, speed
Sensor 24 be mounted on nonpowered axle on, secondary component hydraulic pump/motor pressure sensor 25 be mounted on secondary component hydraulic pump/
On the connecting line of motor 10 and two-bit triplet solenoid directional control valve 9.
Further, controller 1 is internally provided with data acquisition module, data processing module and performs mould in the present embodiment
Block；
The detection signal of each sensor of data acquisition module real-time reception, and detection signal is sent to data processing mould
Block；
Data processing module receives detection signal and simultaneously is handled it to obtain processing signal, according to processing signal to execution
Module sends out control command；
Execution module receives the control command that data processing module is sent, according to control strategy by the biography of control command independence
Pass controlled device.
Specifically control signal connection relation is：Accelerator pedal angular displacement sensor 2, brake pedal angular displacement sensor 3,
Energy storage pressure sensor 6, velocity sensor 24, secondary component hydraulic pump/motor pressure sensor 25, engine 23, speed change
Data acquisition module of the case 22 with controller 1 is electrically connected；
Throttle valve 7, secondary component hydraulic pump/motor 10, electromagnetic clutch 13, starts two-bit triplet solenoid directional control valve 9
The execution module of machine ECU21, electric Proportion valve 15, main brake valve 16 with controller 1 is electrically connected；Engine ECU 21 is with starting
Machine 23 is electrically connected.
In the present embodiment, the accumulation of energy amount of the first high pressure accumulator 4 is more than the accumulation of energy amount of the second high pressure accumulator 5.
The another object of the present embodiment is to provide a kind of hydraulic hybrid regeneration brake system based on double accumulators
Control method as shown in Figures 2 and 3, includes the following steps：
Step 1：When automobilism, controller 1 receives accelerator pedal angular displacement sensor 2 and brake pedal angle position at any time
The angular displacement signal that displacement sensor 3 passes over by the calculating of controller 1, obtains accelerator opening angle signal and braking is stepped on
Plate opening amount signal judges the operating mode of automobile at this time according to accelerator opening angle signal and brake pedal opening amount signal, specific to judge
Condition represents as follows：
For 1a. when accelerator opening angle signal is more than 0, controller 1 judges that automobile is in driving operating mode, and sends out control at this time
System order so that throttle valve 7 is fully open, A mouths of two-bit triplet solenoid directional control valve 9 is connected with T mouthfuls, P mouthfuls close, control at this time
Device 1 is judged according to the aperture of accelerator pedal, and receives the tach signal that Engine ECU 21 passes over, and passes through engine
23 map figures calculate engine 23 exports at this time torque and engine power at this time, judge at this time engine 23 whether
High efficient district is operated in, if being operated in high efficient district, electromagnetic clutch 13 disconnects, at this time 23 independent drive vehicles of engine, if at this time
Engine 23 does not operate at high efficient district, judges that engine 23 is operated in low-speed high-torque state or high speed low torque shape
State；
If engine 23 is operated in low-speed high-torque state to 1b. at this time, electromagnetic clutch 13 combines, at this time controller 1
Pressure signal according to the secondary component hydraulic pump/motor pressure sensor 25 of reception judges 25 liang of secondary component hydraulic pump/motor
The pressure at end, if the pressure at 25 both ends of secondary component hydraulic pump/motor is higher than the minimum work of hydraulic regenerative braking unit at this time
Pressure, then hydraulic regenerative braking unit and the joint of engine 23 drive vehicle at this time, adjust engine 23 at this time and are operated in most preferably
Operating point, hydraulic regenerative braking unit do power supplement, ensure the normally travel of automobile；
If engine 23 is operated in high speed low torque state to 1c. at this time, electromagnetic clutch 13 combines, at this time controller 1
Pressure signal according to the secondary component hydraulic pump/motor pressure sensor 25 of reception judges 25 liang of secondary component hydraulic pump/motor
The pressure at end, if the pressure at 25 both ends of secondary component hydraulic pump/motor can independently drive higher than hydraulic regenerative braking unit at this time
The minimum pressure of dynamic vehicle, then engine 23 does not work at this time, and hydraulic regenerative braking unit, which works independently, drives vehicle；If at this time
The pressure at 25 both ends of secondary component hydraulic pump/motor independently drives the minimum pressure of vehicle less than hydraulic regenerative braking unit, then
The independent driving vehicle of engine 23 at this time, the power more than needed of engine 23 will be used for filling energy for accumulator；
Step 2：When brake pedal opening amount signal, that is, severity of braking is more than 0, controller 1 judges that automobile is in braking deceleration
Operating mode, and send out control command and cause the A mouths of two-bit triplet solenoid directional control valve 9 and P mouthful connections, T mouthfuls are closed, specific Rule of judgment
It represents as follows；
For 2a. as severity of braking z ＞ 0.7, controller 1 judges that damped condition is emergency braking operating mode at this time, and sends out control
System order causes electromagnetic clutch 13 to disconnect, 15 standard-sized sheet of electric Proportion valve, and at this time in order to ensure braking system safety, hydraulic pressure is again
Raw brake unit is no longer participate in work, and mechanical braking unit provides whole braking torques, and controller 1 is according to severity of braking at this time
The aperture for adjusting main brake valve 16 is braked, and does not recycle braking energy at this time；
As severity of braking z≤0.7, electromagnetic clutch 13 combines 2b., and controller 1 receives 4 pipeline of the first high pressure accumulator
On 6 pressure signal of energy storage pressure sensor, according to the discharge capacity of secondary component hydraulic pump/motor 10, calculate hydraulic pressure at this time
The renewable brake force of maximum that regenerative brake unit can provide, and compared with braking required braking torque under severity of braking herein
Compared with if renewable brake force disclosure satisfy that brake request at this time, controller 1 is judged as light brake operating mode, electric Proportion valve
15 and main brake valve 16 close, the throttle valve 7 being connect with the first high pressure accumulator 4 is opened, and is connect with the second high pressure accumulator 5
Throttle valve 7 is closed, and recycles braking energy by the first high pressure accumulator 4 at this time, and mechanical braking unit is not involved in work；If at this time
The renewable braking torque that provides of the second high pressure accumulator 5 it is impossible to meet brake request, then controller 1 judges system at this time
Condition of starting building is moderate damped condition, and the throttle valve 7 being connect with the second high pressure accumulator 5 is opened, connected with the first high pressure accumulator 4
The throttle valve 7 connect is closed, and braking energy is recycled by the second high pressure accumulator 5 at this time, to greatest extent using hydraulic regenerative braking
Unit is calculated by controller 1, and mechanical braking force and renewable brake force are adjusted by adjusting the aperture of electric Proportion valve 15
Ratio, recycle braking energy to greatest extent.
In the present embodiment, brake unit is braked using the optimal energy reclaiming based on line control brake system technology
Take-back strategy, optimal energy take-back strategy turn to target with Brake energy recovery maximum, change the mechanical braking force on driving wheel,
The mechanical braking force on non-driving wheel is not changed；It is high by first at this time using pure regenerative braking on driving wheel in light brake
Accumulator 4 is pressed to recycle braking energy；Composite braking is used when moderate is braked, in composite braking, on driving wheel to greatest extent
Regenerative braking force is played, hypodynamic part is braked and is supplemented by mechanical braking unit, system is recycled by the second high pressure accumulator 5 at this time
Energy；In emergency braking, to ensure the safety of braking, hydraulic regenerative braking unit is not involved in work, and brake force is whole
It is provided by mechanical braking unit.
Using the first different high pressure accumulator 4 of big small size, the second high pressure accumulator 5 recycling braking energy, work
Principle equation below：
According to the equation of gas state：
p0v0 n=p1v1 n=p2v2 n=pvn=c
P in formula0-- the blowing pressure (MPa) of accumulator；
v0--- the original volume (L) of gas in accumulator；
p1--- the minimum operating pressure (MPa) of gas in accumulator；
v1--- pressure p1When gas volume (L)；
p2--- the maximum working pressure (MPa) of gas in accumulator；
v2--- pressure p2When gas volume (L)；
P --- any time accumulator gas pressure (MPa)；
τ --- any time accumulator gas volume (L)；
This process is considered as adiabatic process by n --- air polytropic exponent, and n takes 1.4；
C --- constant.
Hydraulic pump is pressed into the volume delta v of oil to accumulator during braking, then：
Δ V in formula --- pump motor is as accumulator press-in fluid volume (L).
Accumulator is operated in minimum operating pressure p1, maximum working pressure p2Between, air bag volume is in corresponding v1、 v2It
Between, it is filled with after the hydraulic oil of Δ V volumes, gas volume V (unit L) is in air bag：
V=v1-Δv
Accumulator oil charging-discharging process is adiabatic process, is according to pressure p in equation of gas state braking process：
Hydraulic regenerative braking unit provide braking torque T be：
The ENERGY E of recycling is in accumulator:
As the first high pressure accumulator 4,5 minimum operating pressure p of the second high pressure accumulator1One timing, it is assumed that automobile is being braked
During, 10 full-load operation of secondary component pump/motor, therefore the first high pressure accumulator 4, second is filled within the same time
The fluid Δ v of high pressure accumulator 5 is identical, by above formula it is found that the foundation of pressure is than the first high pressure in the second high pressure accumulator 5
What pressure was established in accumulator 1 is fast, therefore can provide the braking torque of bigger in a short time and can recycle braking energy.This
It is small and recycle that sample just compensates for renewable brake force that large volume list high pressure accumulator is provided in the case where severity of braking is higher
The shortcomings that braking energy is low.
In Fig. 2 and Fig. 3, hydraulic system is hydraulic regenerative braking unit.
Embodiment described above is merely preferred embodiments of the present invention, and protection scope of the present invention is without being limited thereto,
Any those skilled in the art in the technical scope of present disclosure, the technical solution that can become apparent to
Simple change or equivalence replacement, all belong to the scope of protection of the present invention.
Claims (6)
1. the hydraulic hybrid regeneration brake system based on double accumulators, which is characterized in that including brake unit, power unit
And control unit；
The brake unit includes hydraulic regenerative braking unit and mechanical braking unit；
The hydraulic regenerative braking unit includes the first high pressure accumulator (4), the second high pressure accumulator (5), throttle valve (7), list
To valve (8), two-bit triplet solenoid directional control valve (9), secondary component hydraulic pump/motor (10), overflow valve (11) and low pressure accumulator
(20), the low pressure accumulator (20) and the oil inlet of the secondary component hydraulic pump/motor (10) and the overflow valve (11)
Oil inlet be connected, the A mouths of the two-bit triplet solenoid directional control valve (9) and going out for secondary component hydraulic pump/motor (10)
The oil outlet of hydraulic fluid port and the overflow valve (11) is connected, P mouths and the check valve of the two-bit triplet solenoid directional control valve (9)
(8) entrance is connected, the outlet of the T mouths and the check valve (8) of the two-bit triplet solenoid directional control valve (9) by pipeline by
The throttle valve (7) is connected to first high pressure accumulator (4) and the second high pressure accumulator (5)；
The mechanical braking unit includes electric Proportion valve (15), main brake valve (16), air accumulator (17), air compressor (18)
With motor (19), the motor (19) drives air compressor (18) rotation, and by high pressure gas storage, there are the air accumulators
(17) in, the air accumulator (17) connect with the main brake valve (16), and the outlet of the main brake valve (16) passes through pipeline point
Not Lian Jie the brake caliper (26) of nonpowered axle and the electric Proportion valve (15), electric Proportion valve (15) port of export connection
The brake caliper (27) of drive shaft；
The power unit includes main reducing gear (12), electromagnetic clutch (13), torsion coupler (14), gearbox (22) and hair
Motivation (23), the power that the engine (23) generates pass to the input shaft of the gearbox (22), the gearbox (22)
The power that generates of output shaft pass to the first transmission shaft of the torsion coupler (14), the secondary component hydraulic pump/horse
The second driving shaft of the torsion coupler (14), institute are passed to by the electromagnetic clutch (13) up to the power that (10) generate
The power for stating the second driving shaft generation of torsion coupler (14) is transmitted via the first transmission shaft of the torsion coupler (14)
Wheels travel is driven to the main reducing gear (12)；
Described control unit includes controller (1), accelerator pedal angular displacement sensor (2), brake pedal angular displacement sensor
(3), energy storage pressure sensor (6), Engine ECU (21), velocity sensor (24) and secondary component hydraulic pump/motor pressure
Sensor (25), the energy storage pressure sensor (6) is mounted on first high pressure accumulator (4) and the second high pressure accumulator
(5) and on the connecting line of the throttle valve (7), the velocity sensor (24) is on nonpowered axle, the Quadratic Finite Element
Part hydraulic pump/motor pressure sensor (25) is mounted on the secondary component hydraulic pump/motor (10) and two-bit triplet electricity
On the connecting line of magnetic reversal valve (9).
2. the hydraulic hybrid regeneration brake system according to claim 1 based on double accumulators, which is characterized in that institute
It states controller (1) and is internally provided with data acquisition module, data processing module and execution module；
The detection signal of each sensor of data acquisition module real-time reception, and detection signal is sent to the data processing
Module；
The data processing module receives the detection signal and it is handled to obtain processing signal, according to processing signal to
The execution module sends out control command；
The execution module receives the control command that the data processing module is sent, according to control strategy that control command is independent
Pass to controlled device.
3. the hydraulic hybrid regeneration brake system according to claim 2 based on double accumulators, which is characterized in that institute
Accelerator pedal angular displacement sensor (2), brake pedal angular displacement sensor (3), energy storage pressure sensor (6), speed is stated to pass
Sensor (24), secondary component hydraulic pump/motor pressure sensor (25), engine (23), gearbox (22) with the control
The data acquisition module electrical connection of device (1)；
The throttle valve (7), two-bit triplet solenoid directional control valve (9), secondary component hydraulic pump/motor (10), electromagnetic clutch
(13), the execution module of Engine ECU (21), electric Proportion valve (15), main brake valve (16) with the controller (1)
Electrical connection；
The Engine ECU (21) is electrically connected with the engine (23).
4. the hydraulic hybrid regeneration brake system according to claim 1 based on double accumulators, which is characterized in that institute
The accumulation of energy amount for stating the first high pressure accumulator (4) is more than the accumulation of energy amount of second high pressure accumulator (5).
5. the hydraulic hybrid regeneration brake system control method based on double accumulators, which is characterized in that include the following steps：
Step 1：When automobilism, the controller (1) receives the accelerator pedal angular displacement sensor (2) and braking at any time
The angular displacement signal that pedal angular displacement sensor (3) passes over, by the calculating of the controller (1), obtains accelerator pedal
Opening amount signal and brake pedal opening amount signal judge at this time according to the accelerator opening angle signal and brake pedal opening amount signal
The operating mode of automobile, specific Rule of judgment represent as follows：
For 1a. when the accelerator opening angle signal is more than 0, the controller (1) judges that automobile is in driving operating mode at this time, and
It sends out control command and so that the throttle valve (7) is fully open, the A mouths of the two-bit triplet solenoid directional control valve (9) connect with T mouthfuls
Logical, P mouthfuls of closings, the controller (1) is judged, and receive the Engine ECU according to the aperture of accelerator pedal at this time
(21) tach signal passed over is schemed by the map of the engine (23), calculates engine (23) output at this time
Torque and engine power at this time judge whether the engine (23) is operated in high efficient district at this time, if being operated in efficiently
Area, the electromagnetic clutch (13) disconnect, at this time engine (23) independent drive vehicles, if the engine (23) at this time
High efficient district is not operated at, judges that the engine (23) is operated in low-speed high-torque state or high speed low torque state；
If the engine (23) is operated in low-speed high-torque state to 1b. at this time, the electromagnetic clutch (13) combines, at this time institute
Controller (1) is stated according to judging the pressure signal of the secondary component hydraulic pump/motor pressure sensor (25) of reception
The pressure at secondary component hydraulic pump/motor (25) both ends, if the pressure at secondary component hydraulic pump/motor (25) both ends at this time
Higher than the minimum operating pressure of hydraulic regenerative braking unit, then the hydraulic regenerative braking unit and the engine (23) at this time
Joint driving vehicle, adjusts the engine (23) and is operated in best operating point, the hydraulic regenerative braking unit is done at this time
Power is supplemented, and ensures the normally travel of automobile；
If the engine (23) is operated in high speed low torque state to 1c. at this time, the electromagnetic clutch (13) combines, at this time institute
State controller (1) judged according to the pressure signal of the secondary component hydraulic pump/motor pressure sensor (25) of reception it is described secondary
The pressure at element hydraulic pump/motor (25) both ends, if the pressure at secondary component hydraulic pump/motor (25) both ends is higher than at this time
Hydraulic regenerative braking unit can independently drive the minimum pressure of vehicle, then the engine (23) does not work at this time, the liquid
Regenerative brake unit is pressed to work independently and drives vehicle；If the pressure at secondary component hydraulic pump/motor (25) both ends is low at this time
The minimum pressure of vehicle is independently driven in the hydraulic regenerative braking unit, then independently driving is whole for the engine (23) at this time
Vehicle, the engine (23) power more than needed will be used for filling energy for second high pressure accumulator (5), when second high pressure stores
After energy device (5) energy is full of, by controlling the throttle valve (7), continues as first high pressure accumulator (4) and fill energy；
Step 2：When the brake pedal opening amount signal, that is, severity of braking is more than 0, the controller (1) judges that automobile is in system
Dynamic decelerating mode, and send out that control command causes A mouths of two three-way solenoid valves (9) and P mouthful are connected, T mouthfuls are closed,
Specific Rule of judgment represents as follows；
For 2a. as the severity of braking z ＞ 0.7, the controller (1) judges that damped condition is emergency braking operating mode at this time, and
Send out control command the electromagnetic clutch (13) is disconnected, electric Proportion valve (15) standard-sized sheet, at this time in order to ensure braking system
System safety, hydraulic regenerative braking unit are no longer participate in work, and mechanical braking unit provides whole braking torques, the controller
(1) aperture that main brake valve (16) is adjusted according to severity of braking at this time is braked, and does not recycle braking energy at this time；
As the severity of braking z≤0.7, the electromagnetic clutch (13) combines 2b., and it is high that the controller (1) receives first
Energy storage pressure sensor (6) pressure signal on accumulator (4) pipeline is pressed, according to the secondary component hydraulic pump/motor
(10) discharge capacity calculates the renewable brake force of maximum that the hydraulic regenerative braking unit at this time can provide, and with making herein
Required braking torque is compared under dynamic severity of braking, if renewable brake force disclosure satisfy that brake request, the control at this time
Device (1) processed is judged as light brake operating mode, and the electric Proportion valve (15) and main brake valve (16) are closed, with first high pressure
The throttle valve (7) of accumulator (4) connection is opened, and the throttle valve (7) being connect with second high pressure accumulator (5) is closed, at this time
Braking energy is recycled by first high pressure accumulator (4), mechanical braking unit is not involved in work；If described second at this time is high
Pressing the renewable braking torque that accumulator (5) provides, then the controller (1) judges system at this time it is impossible to meet brake request
Condition of starting building is moderate damped condition, and the throttle valve (7) being connect with second high pressure accumulator (5) is opened, high with described first
The throttle valve (7) that accumulator (4) connects is pressed to close, braking energy, maximum limit are recycled by second high pressure accumulator (5) at this time
Degree uses hydraulic regenerative braking unit, is calculated by the controller (1), by adjusting opening for the electric Proportion valve (15)
The ratio to adjust mechanical braking force and renewable brake force is spent, recycles braking energy to greatest extent.
6. the hydraulic hybrid regeneration brake system control method according to claim 5 based on double accumulators, special
Sign is that the brake unit is using the optimal energy reclaiming braking recycling plan based on line control brake system technology
Slightly, optimal energy take-back strategy turns to target with Brake energy recovery maximum, changes the mechanical braking force on driving wheel, does not change
Mechanical braking force on non-driving wheel；In light brake, using pure regenerative braking on driving wheel, at this time by first high pressure
Accumulator (4) recycles braking energy；Composite braking is used when moderate is braked, in composite braking, on driving wheel to greatest extent
Regenerative braking force is played, hypodynamic part is braked and is supplemented by mechanical braking unit, at this time by second high pressure accumulator (5)
Recycle braking energy；In emergency braking, to ensure the safety of braking, hydraulic regenerative braking unit is not involved in work, brakes
Power is all provided by mechanical braking unit.
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| CN109080613A (en) * | 2018-07-20 | 2018-12-25 | 燕山大学 | A kind of hydraulic regenerative braking device, braking method and system |
| CN109515407A (en) * | 2018-11-14 | 2019-03-26 | 浙江工业大学 | Parallel hydraulic brake energy recovering system |
| CN109572440A (en) * | 2018-12-28 | 2019-04-05 | 重庆大学 | A kind of electric hydaulic hybrid power system and its control method applied to SUV |
| CN110329224A (en) * | 2019-08-14 | 2019-10-15 | 吉林大学 | Emergency braking energy recycle device and control method based on gas type accumulator |
| CN111071229A (en) * | 2019-12-31 | 2020-04-28 | 一汽解放汽车有限公司 | Air-assisted hydraulic braking system and new energy automobile |
| CN111688668A (en) * | 2019-03-12 | 2020-09-22 | 中冶宝钢技术服务有限公司 | Hydraulic hybrid vehicle control method |
| CN113173147A (en) * | 2021-04-19 | 2021-07-27 | 郑州宇通重工有限公司 | Hybrid brake system and hydraulic drive transportation equipment |
| CN113335242A (en) * | 2021-06-23 | 2021-09-03 | 中国第一汽车股份有限公司 | Integrated braking energy recovery system and integrated braking energy recovery method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109080613A (en) * | 2018-07-20 | 2018-12-25 | 燕山大学 | A kind of hydraulic regenerative braking device, braking method and system |
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| CN111071229A (en) * | 2019-12-31 | 2020-04-28 | 一汽解放汽车有限公司 | Air-assisted hydraulic braking system and new energy automobile |
| CN113173147A (en) * | 2021-04-19 | 2021-07-27 | 郑州宇通重工有限公司 | Hybrid brake system and hydraulic drive transportation equipment |
| CN113335242A (en) * | 2021-06-23 | 2021-09-03 | 中国第一汽车股份有限公司 | Integrated braking energy recovery system and integrated braking energy recovery method |
| CN114151056A (en) * | 2021-12-06 | 2022-03-08 | 吉林大学 | Oil-liquid hybrid fracturing truck and control method thereof |
| CN114151056B (en) * | 2021-12-06 | 2024-02-06 | 吉林大学 | Oil hybrid fracturing truck and control method thereof |
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