CN107856576A - A kind of electro-hydraulic hybrid drive system of vehicle - Google Patents
A kind of electro-hydraulic hybrid drive system of vehicle Download PDFInfo
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- CN107856576A CN107856576A CN201711000392.1A CN201711000392A CN107856576A CN 107856576 A CN107856576 A CN 107856576A CN 201711000392 A CN201711000392 A CN 201711000392A CN 107856576 A CN107856576 A CN 107856576A
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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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/32—Control or regulation of multiple-unit electrically-propelled vehicles
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses a kind of electro-hydraulic hybrid drive system of vehicle, the system is composed in series by driven by power subsystem, hydraulic-driven subsystem and rear wheel drive subsystem.Realize that speed is adjusted using electricity, liquid joint speed governing, it can be ensured that motor, pump, motor in drive system are respectively provided with higher efficiency, so as to ensure that whole drive system has higher transmission efficiency；Hydraulic-driven subsystem introduces hydraulic pressure supplementary module on the basis of hydrostatic pressure system, a part of load torque can be undertaken in the high power operating mode such as Acceleration of starting, steep gradient, to reduce the peak torque of motor and peak power, be advantageous to mitigate the volume and weight of motor, and improve the course continuation mileage of van；Meanwhile hydraulic pressure supplementary module can also realize that motor assist starts and vehicle regenerative is braked, and can eliminate dash current during electric motor starting, improve capacity usage ratio.
Description
Technical field
The present invention relates to a kind of driver for vehicle, and in particular to a kind of electro-hydraulic hybrid drive system of vehicle.
Background technology
Electric car possesses zero-emission, low noise and other advantages, and development vehicle technology can effectively solve the problem that energy source of car and ring
The problems such as border is polluted, is advantageous to the realization of China's target for energy-saving and emission-reduction.Although pure electric vehicle technology quickly grows, is gradually improved,
But the problems such as less efficient when poor course continuation mileage, speed operation is still had at this stage.Electronic railway carriage or compartment for city cargo transport
Formula lorry, the characteristics of start and stop are frequent also be present, and dash current caused by electric motor starting is 5-8 times of rated current, can be tight
The service life of the electrical equipments such as motor, battery is endangered again.Meanwhile for the more traditional fuel oil lorry of electronic van,
Vehicle power performance is poor, it is impossible to meets urban freight requirement well.
The content of the invention
The invention provides a kind of electro-hydraulic hybrid drive system of vehicle, mainly solves present in existing electronic transport van
Speed operation transmission efficiency it is low, vehicle power performance is poor, motor peak power is too high and braking energy waste the problems such as.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of electro-hydraulic hybrid drive system of vehicle, including driven by power subsystem in series, hydraulic-driven subsystem
With rear wheel drive subsystem；The hydraulic-driven subsystem includes closed circuit, repairing overflow module and hydraulic pressure supplementary module；Institute
It is working connection to state closed circuit；The repairing overflow module is for limiting the safe pressure of working connection and being working connection makeup oil
Liquid；The hydraulic pressure supplementary module is used for the assistant starting for completing motor and the heavy duty acceleration of whole vehicle and braking energy
Regeneration function；Also include control system, the control system controls the collection and control of sensor signal in whole drive system
Make each variable element.
According to such scheme, the driven by power subsystem include be sequentially connected battery, inverter, motor,
First rotary speed torque sensor and the first electromagnetic clutch.
According to such scheme, the variable pump of the closed circuit is connected with the first electromagnetic clutch, the second oil of variable pump
Mouth is connected to the second hydraulic fluid port of master variable motor, and the first hydraulic fluid port of master variable motor is connected to the 5th two-position two-way electromagnetic directional valve
P mouths, the A mouths of the 5th two-position two-way electromagnetic directional valve are connected to the P mouths of the 4th two-position two-way electromagnetic directional valve, the four or two two
The A mouths of electric change valve are connected to the first hydraulic fluid port of variable pump.
According to such scheme, the repairing motor driving slippage pump of the repairing overflow module, oil inlet and the oil of slippage pump
Case is connected, and the oil-out of slippage pump is connected with the oil inlet of oil filter, and the oil-out of oil filter enters with repairing overflow valve simultaneously
Hydraulic fluid port, the oil inlet of the first check valve, the oil-out of the first overflow valve, the oil inlet of the second check valve, second overflow valve go out
Hydraulic fluid port, the P mouths of the first two-position two-way electromagnetic directional valve, the first hydraulic fluid port of auxiliary variable motor are connected, repairing overflow valve it is fuel-displaced
Mouth is connected with fuel tank.
According to such scheme, the hydraulic fluid port of the accumulator of the hydraulic pressure supplementary module simultaneously with the second bi-bit bi-pass electromagnetic switch
The A mouths of valve, the oil inlet of pressure-reducing valve, the A mouths oil phase of the 3rd two-position two-way electromagnetic directional valve connect；Second bi-bit bi-pass electromagnetic switch
The P mouths of valve simultaneously with the second hydraulic fluid port of variable pump, the oil-out of the second check valve, the oil inlet of the second overflow valve, the one or two
The A mouths of two electric change valves, the second hydraulic fluid port of master variable motor are connected；The oil-out of pressure-reducing valve, the 3rd bi-bit bi-pass electromagnetism
The P mouths of reversal valve are connected to the P mouths of 3-position-3-way proportional reversing valve simultaneously；The A mouths of 3-position-3-way proportional reversing valve become with auxiliary
Second hydraulic fluid port of amount motor is connected, the B mouths of 3-position-3-way proportional reversing valve while the P with the 4th two-position two-way electromagnetic directional valve
Mouth, the A mouths of the 5th two-position two-way electromagnetic directional valve are connected；First hydraulic fluid port of auxiliary variable motor enters with repairing overflow valve simultaneously
Hydraulic fluid port, the oil-out of oil filter, the oil inlet of the first check valve, the oil-out of the first overflow valve, the second check valve oil inlet,
The oil-out of second overflow valve, the P mouths of the first two-position two-way electromagnetic directional valve are connected.
According to such scheme, two inputs of the dynamic case of conjunction of the rear wheel drive subsystem respectively with the second electromagnetic clutch
Device, the 3rd electromagnetic clutch are connected, and the other end of the second electromagnetic clutch is connected with master variable motor, the 3rd electromagnetic clutch
The other end is connected with auxiliary variable motor；Close the output end and the second rotary speed torque sensor, single reduction gear, rear wheel rotation of dynamic case
To being sequentially connected.
Compared with prior art, the beneficial effects of the invention are as follows：Turned round beneficial to hydraulic energy process auxiliary drive with reducing motor peak value
Square and power, so as to mitigate the weight of motor and volume, improve vehicle course continuation mileage；Motor is realized using hydraulic energy energy storage
Start, eliminate electric motor starting electric current, have actively impact to the life-span for lifting electrical equipment；Freight car braking energy is realized using hydraulic energy
The regeneration of amount, improve capacity usage ratio.
Brief description of the drawings
Fig. 1 is a kind of electro-hydraulic hybrid drive system structure principle chart of vehicle of the present invention.
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings, each label is interpreted as in figure：1-
Battery, 2- inverters, 3- motors, the rotary speed torque sensors of 4- first, the electromagnetic clutch of 5- first；6- variable pumps, 7-
Fuel tank, 8- repairing overflow valves, 9- repairing motors, 10- slippage pumps, 11- oil filters, the check valves of 12- first, the overflow valves of 13- first,
The check valves of 14- second, the overflow valves of 15- second, the two-position two-way electromagnetic directional valves of 16- first, 17- control systems, 18- the two or two
Two electric change valves, 19- accumulators, 20- pressure-reducing valves, the two-position two-way electromagnetic directional valves of 21- the 3rd, 22- 3-position-3-way ratios
Reversal valve, the two-position two-way electromagnetic directional valves of 23- the 4th, the two-position two-way electromagnetic directional valves of 24- the 5th, 25- auxiliary variable motors,
26- master variable motors；The electromagnetic clutch of 27- second, the electromagnetic clutch of 28- the 3rd, 29- close dynamic case, and the second rotating speeds of 30- moment of torsion passes
Sensor, 31- single reduction gears, 32- rear wheel rotations pair.
The present invention is mainly in series by driven by power subsystem, hydraulic-driven subsystem and rear wheel drive subsystem.
The driven by power subsystem is turned round including battery 1, inverter 2, motor 3, the first rotating speed being sequentially connected
The electromagnetic clutch 5 of square sensor 4 and first.Battery 1 provides power for whole system, and inverter 2 is used for adjusting motor 3
Rotating speed.
The hydraulic-driven subsystem includes variable pump 6, fuel tank 7, repairing overflow valve 8, repairing motor 9, slippage pump 10, filter
Oily device 11, the first check valve 12, the first overflow valve 13, the second check valve 14, the second overflow valve 15, the first bi-bit bi-pass electromagnetism change
To valve 16, the second two-position two-way electromagnetic directional valve 18, accumulator 19, pressure-reducing valve 20, the 3rd two-position two-way electromagnetic directional valve 21, three
Position threeway proportional reversing valve 22, the 4th two-position two-way electromagnetic directional valve 23, the 5th two-position two-way electromagnetic directional valve 24, auxiliary variable
Motor 25 and master variable motor 26.
The hydraulic-driven subsystem includes closed circuit, repairing overflow module and hydraulic pressure supplementary module；
The closed circuit is the working connection of this drive system, including variable pump 6, the 4th bi-bit bi-pass electricity being sequentially connected in series
Magnetic reversal valve 23, the 5th two-position two-way electromagnetic directional valve 24, master variable motor 26.Variable pump 6 and the phase of the first electromagnetic clutch 5
Even, the second hydraulic fluid port of variable pump 6 is connected to the second hydraulic fluid port of master variable motor 26, and the first hydraulic fluid port of master variable motor 26 is connected to
The P mouths of 5th two-position two-way electromagnetic directional valve 24, the A mouths of the 5th two-position two-way electromagnetic directional valve 24 are connected to the 4th bi-bit bi-pass
The P mouths of solenoid directional control valve 23, the A mouths of the 4th two-position two-way electromagnetic directional valve 23 are connected to the first hydraulic fluid port of variable pump 6.
Discharge capacity by changing variable pump 6 and master variable motor 26 can realize that speed is adjusted.
The repairing overflow module includes fuel tank 7, repairing overflow valve 8, repairing motor 9, slippage pump 10, oil filter 11, the
One check valve 12, the first overflow valve 13, the second check valve 14, the second overflow valve 15.Repairing motor 9 drives slippage pump 10, repairing
The oil inlet of pump 10 is connected with fuel tank 7, and the oil-out of slippage pump 10 is connected with the oil inlet of oil filter 11, oil filter 11 it is fuel-displaced
Mouthful simultaneously with the oil inlet of the repairing overflow valve 8, oil inlet of the first check valve 12, the oil-out of the first overflow valve 13, second single
Oil inlet, the oil-out of the second overflow valve 15 to valve 14, the P mouths of the first two-position two-way electromagnetic directional valve 16, auxiliary variable horse
The first hydraulic fluid port up to 25 is connected, and the oil-out of repairing overflow valve 8 is connected with fuel tank 7.Repairing overflow module is mainly used in limiting master
The safe pressure of oil circuit and be working connection makeup oil liquid.
The hydraulic pressure supplementary module includes the second two-position two-way electromagnetic directional valve 18, accumulator 19, pressure-reducing valve the 20, the 3rd 2
Two electric change valves 21 of position, 3-position-3-way proportional reversing valve 22, auxiliary variable motor 25.The hydraulic fluid port of accumulator 19 is simultaneously with the
The A mouths of two two-position two-way electromagnetic directional valves 18, the oil inlet of pressure-reducing valve 20, the A mouths oil of the 3rd two-position two-way electromagnetic directional valve 21
Be connected, the P mouths of the second two-position two-way electromagnetic directional valve 18 simultaneously the second hydraulic fluid port with variable pump 6, the second check valve 14 it is fuel-displaced
Mouth, the oil inlet of the second overflow valve 15, the A mouths of the first two-position two-way electromagnetic directional valve 16, the second hydraulic fluid port of master variable motor 26
It is connected, the oil-out of pressure-reducing valve 20, the P mouths of the 3rd two-position two-way electromagnetic directional valve 21 are connected to the commutation of 3-position-3-way ratio simultaneously
The P mouths of valve 22；The A mouths of 3-position-3-way proportional reversing valve 22 are connected with the second hydraulic fluid port of auxiliary variable motor 25,3-position-3-way ratio
The B mouths of example reversal valve 22 simultaneously with the P mouths of the 4th two-position two-way electromagnetic directional valve 23, the 5th two-position two-way electromagnetic directional valve 24
A mouths are connected, the first hydraulic fluid port of auxiliary variable motor 25 oil inlet with repairing overflow valve 8, the oil-out of oil filter 11, the simultaneously
The oil inlet of one check valve 12, the oil-out of the first overflow valve 13, the oil inlet of the second check valve 14, second overflow valve 15 go out
Hydraulic fluid port, the P mouths of the first two-position two-way electromagnetic directional valve 16 are connected.The auxiliary that hydraulic pressure supplementary module is used to complete motor 3 opens
The functions such as the heavy duty acceleration and the regeneration of braking energy of dynamic, whole vehicle.
First hydraulic fluid port of the variable pump 6 while oil-out, the oil inlet of the first overflow valve 13 with the first check valve 12
It is connected, the second hydraulic fluid port of variable pump 6 oil-out with the second check valve 14, the oil inlet of the second overflow valve 15, the one or two simultaneously
Second oil of the position A mouths of two electric change valves 16, the P mouths of the second two-position two-way electromagnetic directional valve 18 and master variable motor 26
Mouth is connected；The P mouths of first two-position two-way electromagnetic directional valve 16 simultaneously the oil inlet with repairing overflow valve 8, oil filter 11 it is fuel-displaced
Mouth, the oil inlet of the first check valve 12, the oil-out of the first overflow valve 13, the oil inlet of the second check valve 14, the second overflow valve
15 oil-out, the first hydraulic fluid port of auxiliary variable motor 25 are connected.
The rear wheel drive subsystem includes the second electromagnetic clutch 27, the 3rd electromagnetic clutch 28, closes dynamic case 29, second
Rotary speed torque sensor 30, single reduction gear 31 and rear wheel rotation are to 32.Two inputs for closing dynamic case 29 are respectively with the
Two electromagnetic clutch 27, the 3rd electromagnetic clutch 28 are connected, the other end and the phase of master variable motor 26 of the second electromagnetic clutch 27
Even, the other end of the 3rd electromagnetic clutch 28 is connected with auxiliary variable motor 25, and the output end and the second rotating speed for closing dynamic case 29 are turned round
Square sensor 30, single reduction gear 31, rear wheel rotation are sequentially connected to 32.The effect for closing dynamic case 29 be by master variable motor 26 with it is auxiliary
The power for helping variable displacement motor 25 to export carries out linear superposition.
Collection, the control of each variable element of sensor signal are completed by control system 17 in whole drive system.
Illustrate the embodiment of the present invention with the operating condition of van below.
During vehicle launch, battery 1 is not powered first to motor 3, and the first electromagnetic clutch 5 closes, the second electromagnetic clutch
27 and the 3rd electromagnetic clutch 28 disconnect, the right position work of the first two-position two-way electromagnetic directional valve 16 in hydraulic system, the two or two
The next work of two electric change valve 18, the 21 left position work of the 3rd two-position two-way electromagnetic directional valve, the 4th bi-bit bi-pass electromagnetism change
To the next work of valve 23,24 upper work of the 5th two-position two-way electromagnetic directional valve, 3-position-3-way proportional reversing valve 22 is in right position
Open state.The high-voltage oil liquid that accumulator 19 discharges is through pressure-reducing valve 20,3-position-3-way proportional reversing valve 22, the 4th bi-bit bi-pass electricity
Enter the first hydraulic fluid port of variable pump 6 after magnetic reversal valve 23 so as to drive variable pump 6, variable pump 6 is driven by the clutch 5 of closure
Motor 3 accelerates to start, and the low pressure fluid of the hydraulic fluid port of variable pump 6 first outlet is via the first two-position two-way electromagnetic directional valve 16, repairing
Overflow valve 8 returns to fuel tank 7.After the first rotary speed torque sensor 4 detects that the rotating speed of motor 3 reaches rotating speed of target, control
System 17 processed provides signal, allows the middle position of 3-position-3-way solenoid directional control valve 22 to work, and connects the electric loop of motor 3, electric power storage
Pond 1 powers to motor 3, motor 3 is directly started working from rotating speed of target.Electricity is driven with hydraulic accumulation energy assistant starting
Machine 3 can not only eliminate inrush current, and can improve electrical system and the service life of battery 1, pass through regulation three
The openings of sizes of position threeway proportional reversing valve 22 can adjust the startup time of motor 3.
After the assistant starting for completing motor 3, control system 17 calculates variable pump 6 and master variable horse according to target vehicle speed
Up to 26 discharge capacity, ensure that variable pump 6 is operated in a higher discharge capacity ratio to ensure efficient driving with master variable motor 26.Work as liquid
When pressure subsystem can not meet the requirement of speed and efficiency simultaneously, first ensure that variable pump 6 is operated in one with master variable motor 26
High discharge capacity ratio, then reaches target vehicle speed by adjusting the rotating speed of motor 3 again.Existed by this electricity, liquid joint speed governing
Realize and ensure that motor 3, variable pump 6, master variable motor 26 possess higher transmission efficiency while vehicle stepless time adjustment,
So as to ensure that whole drive system has higher efficiency.
When lorry accelerates, after the discharge capacity that variable pump 3, master variable motor 26 are calculated according to target vehicle speed, increase is first passed through
The discharge capacity ratio of variable pump 6 increases speed, then increases speed to target by reducing the discharge capacity ratio of master variable motor 26 again
Value.In whole accelerator, the 16 left position work of the first two-position two-way electromagnetic directional valve, the second two-position two-way electromagnetic directional valve 18
Bottom work, the 21 left position work of the 3rd two-position two-way electromagnetic directional valve, 3-position-3-way proportional reversing valve 22 are in left position opening
State, the next work of the 4th two-position two-way electromagnetic directional valve 23, the next work of the 5th two-position two-way electromagnetic directional valve 24.Variable pump
The fluid of 6 second hydraulic fluid ports is through master variable motor 26, the 5th two-position two-way electromagnetic directional valve 24, the 4th two-position two-way electromagnetic directional valve
23 return to the first hydraulic fluid port of variable pump 6.Fluid in accumulator 19 is through pressure-reducing valve 20,3-position-3-way proportional reversing valve 22, auxiliary
Variable displacement motor 25, repairing overflow valve 8 return to fuel tank 7.In accelerator the supplement fluid of system from fuel tank 7 through slippage pump 10, filter
Oily device 11, the first check valve 12 are flowed into closed circuit.Second overflow valve 15 is used for the maximum working pressure for limiting closed circuit,
Master variable motor 26 moves common driving lorry traveling after case 29 is superimposed with the output torque ECDC of auxiliary variable motor 25.Due to auxiliary
Help variable displacement motor 25 to assume responsibility for a part and accelerate moment of torsion, the output torque of master variable motor 26 reduces, so motor 3 exports
Peak power and moment of torsion also will reduce, this be advantageous to reduce motor 3 volume and weight.Simultaneously as motor 3
Power reduces to be reduced so that being consumed energy in accelerating, and is advantageous to improve the course continuation mileage of lorry.
When lorry climbs steep gradient, required driving torque is larger, therefore can also use hydraulic energy process auxiliary drive, this
When hydraulic subsystem in each element regulation with reference to auxiliary accelerating mode.
During freight car braking, motor 3 powers off, and connects the second electromagnetic clutch 27, disconnects the 3rd electromagnetic clutch 28, liquid
16 right position work of the first two-position two-way electromagnetic directional valve in subsystem is pressed, the second two-position two-way electromagnetic directional valve 18 is the next to work,
The right position work of 3rd two-position two-way electromagnetic directional valve 21,3-position-3-way proportional reversing valve 22 are in right position open state, and the four or two
Position two electric change valves, 23 upper work, the next work of the 5th two-position two-way electromagnetic directional valve 24.Rear wheel rotation is anti-to 32 to drive master
Variable displacement motor 26 rotates, and master variable motor 26 is in pump condition, and hydraulic oil is from fuel tank 7 through slippage pump 10, oil filter the 11, the 1st
Two electric change valves 16 of position enter the second hydraulic fluid port of master variable motor 26, the high pressure of the first hydraulic fluid port outlet of master variable motor 26
Fluid is through the 5th two-position two-way electromagnetic directional valve 24,3-position-3-way proportional reversing valve 22, the 3rd two-position two-way electromagnetic directional valve 21
Flow into accumulator 19.The length of vehicle braking time is can adjust by adjusting the openings of sizes of 3-position-3-way proportional reversing valve 22.
Lorry mechanical energy when braking can be converted into hydraulic energy using hydraulic energy regenerative braking to be stored in accumulator 19, avoid passing
The mechanical energy of lorry is slatterned in the form of frictional heat when controlling is dynamic, improves capacity usage ratio.
During lorry descending, for steady at the uniform velocity descending, it is also desirable to braking in real time, therefore hydraulic regenerating system can also be taken
It is dynamic, realize vehicle at the uniform velocity descending while, reclaim descending mechanical energy, the regulation of each element is with reference to freight car braking work in drive system
Condition.
When lorry, which is in idle operating mode, to be needed to press to the fliud flushing of accumulator 19, the first electromagnetic clutch 5 closes, hydraulic pressure subsystem
First two-position two-way electromagnetic directional valve, 16 left position work in system, the 18 upper work of the second two-position two-way electromagnetic directional valve, the three or two
Two electric change valve of position, 21 left position work, 3-position-3-way proportional reversing valve 22 are in middle position, the 4th bi-bit bi-pass electromagnetic switch
23 upper work of valve, the next work of the 5th two-position two-way electromagnetic directional valve 24.Motor 3 drives variable pump 6 to work, fuel tank 7
In fluid flow into variable pump 6 through slippage pump 10, oil filter 11, the first check valve 12, the high-voltage oil liquid that variable pump 6 exports is through the
Two two-position two-way electromagnetic directional valves 18 are flowed into accumulator 19.The maximum working pressure of accumulator 19 is adjusted by the second overflow valve 15
It is fixed.Treat that the first rotary speed torque sensor 4 detects that the output torque of variable pump 6 reaches desired value (by oil pressure relief and pumpage
Determine) after, stop the power supply of the electromagnet of the second two-position two-way electromagnetic directional valve 18, it is operated in bottom, while stop driving
The power supply of dynamic motor 3, terminate the topping up work of accumulator 19.
The present invention proposes a kind of new electro-hydraulic hybrid drive system for the electronic van in city, can ensure whole
Individual drive system has higher transmission efficiency in full speed range.Electro-hydraulic joint speed governing plan is used based on electricity, liquid combination drive
Slightly, the frequency control strategy of driven motor van use is instead of, ensures that motor is operated near rated speed, energy
Motor is enough avoided to cause inefficient problem because rotating speed is low, meanwhile, ensure that variable pump 6, master variable motor 26 are operated in
In the range of high discharge capacity ratio, so as to ensure that whole drive system possesses higher efficiency.
Based on hydraulic energy assistant starting motor, dash current when motor 3 starts can be eliminated.Motor 3 opens
When dynamic, first disconnect the electric loop of motor 3, drive motor 3 to start using hydraulic energy energy storage is counter, motor to be driven
3 rotating speeds reach the electric loop for connecting motor 3 after rotating speed of target again, start electricity so as to efficiently avoid motor 3
The generation of stream, to improving motor, the life-span of the element such as battery have active influence, while when can also reduce electric motor starting
Power consumption, the course continuation mileage for improving motor wagon is also benefited.
Aid in accelerating or climb based on hydraulic energy, the peak torque and power of motor under severe duty can be reduced.Vehicle
Start or larger driving torque and power are generally required when climbing steep gradient, and in electricity, liquid hybrid drive system, load torque
It can be driven jointly by master variable motor 26 and auxiliary variable motor 25, the output torque of master variable motor 25 reduces, motor 3
The peak torque and peak power of required offer are also reduced, and this has to reducing the volume of motor 3, improving battery energy storage mileage
Benefit.
Based on hydraulic energy regenerative braking, braking mechanical energy can be reclaimed, vehicle at the uniform velocity descending is realized, avoids energy dissipation,
Improve energy utilization rate.During vehicle braking, master variable motor 26 is driven using load is anti-, can be by brake while realizing and brake
Tool can be converted to hydraulic energy and be stored in accumulator 19, avoid vehicle braking mechanical energy from being wasted in the form of frictional heat energy
Fall.
Claims (6)
- A kind of 1. electro-hydraulic hybrid drive system of vehicle, it is characterised in that：Driven including driven by power subsystem in series, hydraulic pressure Subsystem and rear wheel drive subsystem；It is auxiliary that the hydraulic-driven subsystem includes closed circuit, repairing overflow module and hydraulic pressure Help module；The closed circuit is working connection；The safe pressure that the repairing overflow module is used to limit working connection oil with based on Road supplements fluid；The hydraulic pressure supplementary module is used for the heavy duty acceleration of the assistant starting for completing motor (3) and whole vehicle And the regeneration function of braking energy；Also include control system (17), the control system (17) is controlled in whole drive system The collection of sensor signal and each variable element of control.
- A kind of 2. electro-hydraulic hybrid drive system of vehicle according to claim 1, it is characterised in that：The driven by power subsystem System includes battery (1), inverter (2), motor (3), the first rotary speed torque sensor (4) and the first electricity being sequentially connected Magnet clutch (5).
- A kind of 3. electro-hydraulic hybrid drive system of vehicle according to claim 1, it is characterised in that：The change of the closed circuit Amount pump (6) is connected with the first electromagnetic clutch (5), and the second hydraulic fluid port of variable pump (6) is connected to the second of master variable motor (26) Hydraulic fluid port, the first hydraulic fluid port of master variable motor (26) are connected to the P mouths of the 5th two-position two-way electromagnetic directional valve (24), the five or two two The A mouths of electric change valve (24) are connected to the P mouths of the 4th two-position two-way electromagnetic directional valve (23), and the 4th bi-bit bi-pass electromagnetism changes The first hydraulic fluid port of variable pump (6) is connected to the A mouths of valve (23).
- A kind of 4. electro-hydraulic hybrid drive system of vehicle according to claim 1, it is characterised in that：The repairing overflow module Repairing motor (9) driving slippage pump (10), the oil inlet of slippage pump (10) is connected with fuel tank (7), slippage pump (10) it is fuel-displaced Mouthful it is connected with the oil inlet of oil filter (11), the oil-out of oil filter (11) while oil inlet with repairing overflow valve (8), first The oil inlet of check valve (12), the oil-out of the first overflow valve (13), oil inlet, the second overflow valve of the second check valve (14) (15) oil-out, the P mouths of the first two-position two-way electromagnetic directional valve (16), the first hydraulic fluid port of auxiliary variable motor (25) is connected, The oil-out of repairing overflow valve (8) is connected with fuel tank (7).
- A kind of 5. electro-hydraulic hybrid drive system of vehicle according to claim 1, it is characterised in that：The hydraulic pressure supplementary module Accumulator (19) hydraulic fluid port simultaneously with the A mouths of the second two-position two-way electromagnetic directional valve (18), the oil inlet of pressure-reducing valve (20), the The A mouths oil phase of three two-position two-way electromagnetic directional valves (21) connects；The P mouths of second two-position two-way electromagnetic directional valve (18) while and variable Second hydraulic fluid port of pump (6), the oil-out of the second check valve (14), the oil inlet of the second overflow valve (15), the first bi-bit bi-pass electricity A mouths, the second hydraulic fluid port of master variable motor (26) of magnetic reversal valve (16) are connected；The oil-out of pressure-reducing valve (20), the three or two two The P mouths of electric change valve (21) are connected to the P mouths of 3-position-3-way proportional reversing valve (22) simultaneously；3-position-3-way proportional reversing valve (22) A mouths are connected with the second hydraulic fluid port of auxiliary variable motor (25), and the B mouths of 3-position-3-way proportional reversing valve (22) are simultaneously with the The P mouths of four two-position two-way electromagnetic directional valves (23), the A mouths of the 5th two-position two-way electromagnetic directional valve (24) are connected；Auxiliary variable horse Up to (25) the first hydraulic fluid port simultaneously with the oil inlet of repairing overflow valve (8), the oil-out of oil filter (11), the first check valve (12) Oil inlet, the oil-out of the first overflow valve (13), the oil inlet of the second check valve (14), the second overflow valve (15) it is fuel-displaced Mouth, the P mouths of the first two-position two-way electromagnetic directional valve (16) are connected.
- A kind of 6. electro-hydraulic hybrid drive system of vehicle according to claim 1, it is characterised in that：The rear wheel drive subsystem Two inputs that case (29) is moved in the conjunction of system are connected with the second electromagnetic clutch (27), the 3rd electromagnetic clutch (28) respectively, the The other end of two electromagnetic clutch (27) is connected with master variable motor (26), the other end and auxiliary of the 3rd electromagnetic clutch (28) Variable displacement motor (25) is connected；Close the output end of dynamic case (29) and the second rotary speed torque sensor (30), single reduction gear (31), after Wheel wheel is sequentially connected to (32).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711000392.1A CN107856576A (en) | 2017-10-24 | 2017-10-24 | A kind of electro-hydraulic hybrid drive system of vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711000392.1A CN107856576A (en) | 2017-10-24 | 2017-10-24 | A kind of electro-hydraulic hybrid drive system of vehicle |
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| CN201711000392.1A Pending CN107856576A (en) | 2017-10-24 | 2017-10-24 | A kind of electro-hydraulic hybrid drive system of vehicle |
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| CN108819798A (en) * | 2018-07-24 | 2018-11-16 | 西南交通大学 | A kind of wind-powered electricity generation liquid drive system |
| CN108973645A (en) * | 2018-07-10 | 2018-12-11 | 许昌学院 | A kind of starting of vehicle enclosed and regenerative brake control system and control method |
| CN108973980A (en) * | 2018-07-10 | 2018-12-11 | 许昌学院 | A kind of parallel-type vehicle hybrid power control system and control method |
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| CN115352419A (en) * | 2022-08-23 | 2022-11-18 | 中国人民解放军陆军装甲兵学院 | Hydraulic control system and method for snow pressing vehicle capable of recycling braking energy |
| CN115352419B (en) * | 2022-08-23 | 2024-04-16 | 中国人民解放军陆军装甲兵学院 | Hydraulic control system and method for snow pressing vehicle capable of recycling braking energy |
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Application publication date: 20180330 |