CN108422858A - A kind of electric hydaulic multi-power driven vehicle dynamical system - Google Patents
A kind of electric hydaulic multi-power driven vehicle dynamical system Download PDFInfo
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- CN108422858A CN108422858A CN201810207611.1A CN201810207611A CN108422858A CN 108422858 A CN108422858 A CN 108422858A CN 201810207611 A CN201810207611 A CN 201810207611A CN 108422858 A CN108422858 A CN 108422858A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K17/354—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having separate mechanical assemblies for transmitting drive to the front or to the rear wheels or set of wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
The invention discloses a kind of electric hydaulic multi-power driven vehicle dynamical systems, including electronic control unit, motor, battery pack, the first hydraulic accumulator, variable hydraulic motor, clutch, multigroup wheel, drive axle；Battery pack is connected with two motors, and the output end of two motors is connected with one group of two wheels respectively；First hydraulic accumulator is connected with the oil transportation entrance of variable hydraulic motor, and the first hydraulic accumulator is used to store the braking energy of recycling, auxiliary drive and braking；Variable hydraulic motor is connect by clutch with drive axle to drive another group of two wheels；Electronic control unit is connected with motor, the first hydraulic accumulator, variable hydraulic motor, clutch respectively, and electronic control unit controls Operation Conditions and the discharge capacity of variable hydraulic motor, the switch of the first hydraulic accumulator, the closure of clutch or the unlatching of motor；Battery pack is powered motor, electronic control unit；The present invention has the advantages that variable speed and four-wheel drive, energy saving, raising course continuation mileage.
Description
Technical field
The invention belongs to automobile energy-saving emission reduction and vehicle field of new energy technologies, more particularly to a kind of electric hydaulic combined drive
Dynamic automotive power.
Background technology
Energy and environment problem is becoming increasingly acute so that develops energy saving and environment friendly vehicle and is paid attention to by more and more people.It is pure
Though the advantage that electric vehicle has energy density high as new energy technology the main direction of development, is limited by battery technology, energy of continuing a journey
Power becomes the major obstacle of its development.In addition its power density is relatively low, instantaneous energy-absorbing or release can poor performance so that braking energy returns
Fruit of producing effects is undesirable.And frequently to battery set charge/discharge in the short time, load and the impact to motor and battery pack are increased, shadow
Ring the service life and performance of element.It is needed simultaneously for motor when such as starting, anxious acceleration, climbing when vehicle load is larger
High current is provided, at this time the too fast cruising ability that greatly affected vehicle of power consumption.
And hydraulic drive has the characteristics that power density is big, facilitates and realize stepless speed regulation, gets off especially for city operating mode
Starting and stopping are frequent, its advantage can be made to become apparent from.But apply hydraulic transmission technology at present is mostly to be moved to be main with engine
The Technology of Hybrid Electric Vehicle in power source has certain limitation to the optimization of engine.Pure electric vehicle technology is combined with hydraulic transmission technology
More preferably energy-saving effect is had together.
In current domestic and international research, research mostly is to increase hydraulic pressure on the basis of original pure electric vehicle machine driving to drive
Dynamic part and rotating speed or torsion coupler utilize hydraulic power auxiliary drive for severe road surface.Though this mode can be with smaller
Cost improves the performance of vehicle, but there are the shortcomings of complicated, complete vehicle quality increases, high failure rate, transmission efficiency is undesirable.
And a kind of power system for mechanical-electrical-liquid hybrid-driven vehicle that Chinese patent application CN102029888A is proposed, although hydraulic pressure is utilized
Drive technology cancels speed changer, but the presence of compact internal combustion engine keeps whole system structure extremely complex, and cost increases, and more makes control
Difficulty processed increases, transmission efficiency is low.A kind of electrohydraulic mixed power transmission system that Chinese patent application CN105291861A is proposed,
Due to there is the presence of speed changer and coupling mechanism, there are still the shortcomings of complicated, quality is big, cannot give full play to two kinds of technologies
In conjunction with advantage.
Invention content
Technical problem solved by the invention is to provide a kind of electric hydaulic multi-power driven vehicle dynamical system, to solve
The problem that existing automotive power is complicated, control difficulty is big, quality is big, transmission efficiency is low.
Realize that the technical solution of the object of the invention is：
A kind of electric hydaulic multi-power driven vehicle dynamical system, including electronic control unit, motor, battery pack, the first hydraulic pressure store
It can device, variable hydraulic motor, clutch, multigroup wheel, drive axle；
The battery pack is connected with two motors, the power output ends of two motors, two wheel phases with one group respectively
Even；First hydraulic accumulator is connected with the oil transportation entrance of variable hydraulic motor, and the first hydraulic accumulator is recycled for storing
Braking energy, auxiliary drive and braking；Variable hydraulic motor power output end is connect by clutch with drive axle；Drive axle
Drive another group of two wheels；The electronic control unit respectively with motor, the first hydraulic accumulator, variable hydraulic motor, clutch
Device is connected, electronic control unit control motor Operation Conditions and the discharge capacity of variable hydraulic motor, the first hydraulic accumulator switch, from
The closure of clutch or unlatching；The battery pack is powered motor, electronic control unit.
Compared with prior art, the present invention its remarkable advantage：
(1) present invention eliminates the transmission mechanisms such as the engine of conventional truck, speed changer, transmission shaft, are directly driven by motor
Motor car wheel realizes pure electric vehicle driving.It realizes pernicious gas zero-emission, reduces the pollution to environment.
(2) and on the basis of pure electric vehicle hydraulic-driven part, including the first hydraulic accumulator 4, variable are increased
Hydraulic motor 5, clutch 6, the second hydraulic accumulator 8, recharging oil device 9.Hydraulic accumulator is introduced as the secondary of hydraulic-driven
Energy cell can realize the recycling of auxiliary drive, braking and braking energy.Pass through variable delivery hydraulic horse during vehicle braking
It up to high efficiente callback braking energy and is stored in hydraulic accumulator, releases when needed.Energy-saving efficiency is greatly improved, effectively
Avoid the harmful effect that high current charges to battery pack, moreover it is possible to extend conventional brake service life.
(3) hydraulic-driven part can make auxiliary drive, when vehicle load increases suddenly, provide hydraulic energy and turn to mechanical energy
The power output of change makes motor long-term stable operation in efficient region, improves energy conversion efficiency and course continuation mileage, and energy
Reduce the requirement to motor peak power.
(4) there are many drive modes for vehicle：Pure electric vehicle driving, pure hydraulic-driven and electric drive and hydraulic-driven work simultaneously
Make realization four-wheel drive, control unit carries out pattern switching as needed, and control freedom degree is big.It can be obviously improved when vehicle 4 wheel driven
Power performance, passability.
(5) variable speed is realized：Continuous controllable and variable hydraulic motor the discharge capacity consecutive variations of motor, ensure that one
The requirement of variable speed in fixed vehicle speed range so that driver is easy to operate, is not necessarily to gear shift operation.Realization can also be facilitated to reverse gear
Driving function.
(6) present invention eliminates conventional mechanical transmission structures, keep complete vehicle structure simple, can effectively improve vehicle chassis most
The small road clearance mitigates complete vehicle quality, improves the cross-country ability of vehicle.
Present invention is further described in detail below in conjunction with the accompanying drawings.
Description of the drawings
Fig. 1 is the overall structure diagram of electric hydaulic multi-power driven vehicle dynamical system of the present invention.
Fig. 2 is that electric hydaulic multi-power driven vehicle dynamical system of the present invention in the drive mode illustrate by energy transmission route
Figure.
Fig. 3 is that electric hydaulic multi-power driven vehicle dynamical system of the present invention in the braking mode illustrate by energy transmission route
Figure.
Specific implementation mode
In order to illustrate technical scheme of the present invention and technical purpose, below in conjunction with the accompanying drawings and specific embodiment is the present invention
It is further to introduce.
In conjunction with Fig. 1, a kind of electric hydaulic multi-power driven vehicle dynamical system, including electronic control unit 1, motor 2, battery pack 3,
First hydraulic accumulator 4, variable hydraulic motor 5, clutch 6, multigroup wheel 7, drive axle 10；
The battery pack 3 is connected with two motors 2, the power output ends of two motors 2, two wheels 7 with one group respectively
It is connected；First hydraulic accumulator 4 is connected with the oil transportation entrance of variable hydraulic motor 5, and the first hydraulic accumulator 4 is for storing
The braking energy of recycling, auxiliary drive and braking；5 power output end of variable hydraulic motor is connected by clutch 6 and drive axle 10
It connects；Drive axle 10 drives another group of two wheels 7；The electronic control unit 1 respectively with motor 2, the first hydraulic accumulator 4, become
Measure hydraulic motor 5, clutch 6 is connected, electronic control unit 1 controls the Operation Conditions of motor 2 and the discharge capacity of variable hydraulic motor 5, the
The switch of one hydraulic accumulator 4, the closure of clutch 6 or unlatching；The battery pack 3 is powered motor 2, electronic control unit 1.
In some embodiments, the power output end of the motor 2 is connected directly with wheel 7；Implement as preferred
Mode, the motor 2 are connected by hub reduction gear with wheel 7.
Preferably, the motor 2 uses wheel motor or wheel hub motor, and rotating speed, torque are continuously controllable.
Further, the battery pack 3 is unlimited for forms such as accumulator, lithium ion battery, battery packs, and can direct plug-in
Charging is directly replaced.
Preferably, the variable hydraulic motor 5 using automatically controlled bidirectional variable hydraulic motor, it can be achieved that displacement size is adjustable,
And direction of rotation is variable.
In some embodiments, electric hydaulic multi-power driven vehicle dynamical system trailing wheel of the invention uses electronic drive
Dynamic, front-wheel uses hydraulic-driven.
In other embodiment, electric hydaulic multi-power driven vehicle dynamical system trailing wheel of the invention uses hydraulic pressure
Driving, front-wheel use electric drive.For the vehicle of three groups or more of wheel 7, other group of wheel 7 can be used electronic, hydraulic pressure or
Without driving.
In some embodiments, the oil transportation outlet of the variable hydraulic motor 5 is connected with fuel tank, forms open hydraulic and returns
Road；As preferred embodiment, the oil transportation outlet of the variable hydraulic motor 5 is connected with the second accumulator 8, and described second stores
Energy device 8 is connected with electronic control unit 1, forms closed hydraulic loop, improves hydraulicefficiency.
Further, the oil transportation outlet of the variable hydraulic motor 5 is also connected with slippage pump 9, slippage pump 9 and electronic control unit
1 is connected；The electronic control unit 1 controls slippage pump 9, and supplement fluid is provided for entire hydraulic system, plays the loss of compensation hydraulic oil, lets out
Dew acts on.
In conjunction with Fig. 2, electric hydaulic multi-power driven vehicle dynamical system of the invention is when driving situation, not according to operating mode
Together, there is following energy transmission route：
When stop-start, electronic control unit 1 obtains start signal and accelerator pedal signal is started to work.Electronic control unit 1 first
The pressure for detecting the first hydraulic accumulator 4, if insufficient pressure, motor 2 is rotated with motor car wheel 7 starts vehicle, is controlled by electronic control unit 1
Motor 2 processed is driven for pure electric vehicle at this time with meeting traveling demand.If the pressure of the first hydraulic accumulator 4 is sufficient, by the first hydraulic pressure
Accumulator 4 is individually for hydraulic system and provides High voltage output, drives variable hydraulic motor 5, clutch 6 to be closed, drive axle 10 is becoming
Measuring hydraulic motor 5 drives lower band motor car wheel 7 to rotate, and is pure hydraulic-driven state, overcomes load in motor start-up procedure at this time
Greatly, the shortcomings that efficiency is low, low-response.
When anxious acceleration or climbing, if the insufficient pressure of the first hydraulic accumulator 4, electronic control unit 1 controls the increase output of motor 2
Torque drives in pure electric vehicle.If the pressure of the first hydraulic accumulator 4 is sufficient, vehicle is driven jointly by electronic and hydraulic-driven.
Auxiliary drive is played in hydraulic-driven part, can reduce the demand to motor peak power.Vehicle is total to by electronic and hydraulic-driven
With driving, four-wheel drive is realized, vehicle dynamic property greatly improves.
At the uniform velocity when driving, electronic control unit 1 monitors the pressure size of the first hydraulic accumulator 4 in real time, and big according to its pressure
It is small can be there are two types of working method.If the pressure of the first hydraulic accumulator 4 reaches preset pressure maximum value, hydraulic system is not involved in
Driving, clutch 6 are opened, and controlling motor 2 by electronic control unit 1 is operated alone vehicle traveling, is electric-only mode at this time.And when the
When the pressure of one hydraulic accumulator 4 drops to preset pressure minimum value, hydraulic system pressurising need to be given.When power of driving a vehicle is little,
Clutch 6 is closed, and while driving vehicle traveling by motor 2, extra power is used for that variable hydraulic motor 5 is driven to rotate, and leads to
The discharge capacity that electronic control unit 1 controls variable hydraulic motor 5 is crossed, work is allowed in a pumping mode, by the liquid in the second hydraulic accumulator 8
Pressure oil is pressed into the first hydraulic accumulator 4, so that hydraulic system pressure is increased, energy stores, which get up to discharge in due course, such as stops
Vehicle is started to walk or suddenly acceleration etc..
When reverse travel, electronic control unit 1 detects the rotation side of the signal that reverses gear, regulation motor 2 or variable hydraulic motor 5
To realizing that the gear reversing function of vehicle, the transfer route of energy are the same when advancing with normally travel.
In conjunction with Fig. 3, electric hydaulic multi-power driven vehicle dynamical system of the invention is in brake condition, not according to operating mode
Together, there is following energy transmission route：
Under slight or moderate severity of braking, electronic control unit 1 detects that motor 2 is controlled when brake pedal signal to be stopped turning at once
It is dynamic.Electronic control unit 1 monitors the pressure size of the first hydraulic accumulator 4 in real time, there is different operating mode.Meeting severity of braking
Under the premise of, braking mode selecting priority is：Hydraulic regenerative braking>Motor regenerative braking>Conventional brake.Therefore, pass through electricity
The discharge capacity that unit 1 controls variable hydraulic motor 5 is controlled, is allowed to work in a pumping mode, is driven by the inertia energy of vehicle, and by vehicle
Inertia energy be converted into hydraulic energy, be stored in the first hydraulic accumulator 4, realize the recycling of braking energy.And when the first hydraulic pressure
When accumulator 4 is full of, cut-off clutch 6, start motor regenerative braking and charge to battery pack immediately.If battery electric quantity reaches certain
Conventional brake is started when one predetermined maximum immediately to start to brake.It in any case, should all when severity of braking cannot be met
It is preferential to ensure brake safe, start conventional brake braking immediately.
When another situation is emergency braking, driver steps on brake pedal suddenly, should stop motor 2 immediately, by variable liquid
The discharge capacity of pressure motor 5 is adjusted to reversed maximum, and realizes emergency braking together with conventional brake cooperating.
Claims (10)
1. a kind of electric hydaulic multi-power driven vehicle dynamical system, which is characterized in that including electronic control unit (1), motor (2), electricity
Pond group (3), the first hydraulic accumulator (4), variable hydraulic motor (5), clutch (6), multigroup wheel (7), drive axle (10)；
The battery pack (3) is connected with two motors (2), the power output ends of two motors (2), two vehicles with one group respectively
(7) are taken turns to be connected；First hydraulic accumulator (4) is connected with the oil transportation entrance of variable hydraulic motor (5), the first hydraulic accumulator
(4) it is used to store the braking energy of recycling, auxiliary drive and braking；Variable hydraulic motor (5) power output end passes through clutch
(6) it is connect with drive axle (10)；Drive axle (10) drives another group of two wheels (7)；The electronic control unit (1) respectively with electricity
Machine (2), the first hydraulic accumulator (4), variable hydraulic motor (5), clutch (6) are connected, and electronic control unit (1) controls motor (2)
Operation Conditions and the discharge capacity of variable hydraulic motor (5), the switch of the first hydraulic accumulator (4), clutch (6) closure or open
It opens；The battery pack (3) is powered motor (2), electronic control unit (1).
2. a kind of electric hydaulic multi-power driven vehicle dynamical system according to claim 1, which is characterized in that the motor
(2) power output end is connected directly with wheel (7).
3. a kind of electric hydaulic multi-power driven vehicle dynamical system according to claim 1, which is characterized in that the motor
(2) it is connected with wheel (7) by hub reduction gear.
4. a kind of electric hydaulic multi-power driven vehicle dynamical system according to claim 1, which is characterized in that the motor
(2) wheel motor or wheel hub motor are used.
5. a kind of electric hydaulic multi-power driven vehicle dynamical system according to claim 1, which is characterized in that the variable
Hydraulic motor (5) uses automatically controlled bidirectional variable hydraulic motor.
6. a kind of electric hydaulic multi-power driven vehicle dynamical system according to claim 1, which is characterized in that trailing wheel uses
Electric drive, front-wheel use hydraulic-driven.
7. a kind of electric hydaulic multi-power driven vehicle dynamical system according to claim 1, which is characterized in that trailing wheel uses
Hydraulic-driven, front-wheel use electric drive.
8. a kind of electric hydaulic multi-power driven vehicle dynamical system according to claim 1, which is characterized in that the variable
The oil transportation outlet of hydraulic motor (5) is connected with fuel tank.
9. a kind of electric hydaulic multi-power driven vehicle dynamical system according to claim 1, which is characterized in that the variable
The oil transportation outlet of hydraulic motor (5) is connected with the second accumulator (8), and second accumulator (8) is connected with electronic control unit (1).
10. a kind of electric hydaulic multi-power driven vehicle dynamical system according to claim 1, which is characterized in that the change
The oil transportation outlet of amount hydraulic motor (5) is also connected with slippage pump (9), and slippage pump (9) is connected with electronic control unit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810207611.1A CN108422858A (en) | 2018-03-14 | 2018-03-14 | A kind of electric hydaulic multi-power driven vehicle dynamical system |
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| CN201810207611.1A CN108422858A (en) | 2018-03-14 | 2018-03-14 | A kind of electric hydaulic multi-power driven vehicle dynamical system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109572681A (en) * | 2019-01-22 | 2019-04-05 | 吉林大学 | A kind of vehicle drive system and its control method based on the coupling of tandem two-way hydraulic power stream |
| CN110395115A (en) * | 2019-07-25 | 2019-11-01 | 河南美力达汽车有限公司 | A kind of control method of pure electric vehicle vehicle Brake energy recovery |
| CN111959484A (en) * | 2020-08-18 | 2020-11-20 | 北京理工大学 | Control system and control method of motor hydraulic pump/motor composite driving device |
| CN112829573A (en) * | 2021-03-04 | 2021-05-25 | 青岛科而泰控股有限公司 | Electric automobile and electro-hydraulic hybrid power driving system |
| CN113580913A (en) * | 2021-09-02 | 2021-11-02 | 浙江大学 | Series-parallel hydraulic hybrid power system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109572681A (en) * | 2019-01-22 | 2019-04-05 | 吉林大学 | A kind of vehicle drive system and its control method based on the coupling of tandem two-way hydraulic power stream |
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| CN113580913B (en) * | 2021-09-02 | 2023-07-18 | 浙江大学 | Series-parallel hydraulic hybrid power system |
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Application publication date: 20180821 |