CN107253438A - The four-wheel drive system and hybrid vehicle of a kind of hybrid vehicle - Google Patents
The four-wheel drive system and hybrid vehicle of a kind of hybrid vehicle Download PDFInfo
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- CN107253438A CN107253438A CN201710248504.9A CN201710248504A CN107253438A CN 107253438 A CN107253438 A CN 107253438A CN 201710248504 A CN201710248504 A CN 201710248504A CN 107253438 A CN107253438 A CN 107253438A
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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
-
- 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
- B60K6/08—Prime-movers comprising combustion engines and mechanical or fluid energy storing means
-
- 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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- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/84—Data processing systems or methods, management, administration
-
- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
Abstract
Embodiment of the present invention discloses the four-wheel drive system and hybrid vehicle of a kind of hybrid vehicle.Four-wheel drive system includes：Front-wheel drive subsystem comprising engine, for promoting hybrid vehicle based on engine driving front wheel motion；Rear wheel drive subsystem comprising hydraulic pump motor, for driving rear wheel movement when hydraulic pump motor is operated in hydraulic motor operating mode to promote hybrid vehicle, and stores braking energy when hydraulic pump motor is operated in hydraulic pressure pump condition.Embodiment of the present invention also sets up hydraulic-driven subsystem to realize four-wheel drive outside existing engine drive system, improves dynamic property and energy consumption index optimization space, and realize low cost, high efficiency and high braking energy.
Description
Technical field
The present invention relates to automobile technical field, more particularly, to a kind of four-wheel drive system of hybrid vehicle and
Hybrid vehicle.
Background technology
National newest standards《The term and definition of automobile and trailer type》Have in (GB/T 3730.1-2001) to automobile
It is defined as below：By power drive, the vehicle of the non-track carrying with 4 or more than 4 wheels is mainly used in：Carrying personnel
And (or) goods；Draw the vehicle of carrying personnel and (or) goods；Specific use.Energy shortage, oil crisis and environmental pollution
Grow in intensity, the life given people brings tremendous influence, be directly connected to the sustainable development of national economy and society.The world is each
State is all in active development new energy technology.
Hybrid vehicle (Hybrid Vehicle) refer to driver for vehicle by it is two or more can be while operating
The vehicle that single drive system is constituted jointly, the road horsepower of vehicle is independent by drive system according to actual vehicle running state
Or common offer.Hybrid vehicle reduces the new automobile of consumption of petroleum, low stain, low noise as a kind of, it is considered to be
Solve the important channel of energy crisis and environmental degradation.Hybrid vehicle meet vehicle dynamic quality requirement and continual mileage will
On the premise of asking, fuel economy is effectively improved, discharge is reduced, it is considered to be current energy-conservation and the active path of emission reduction
One of.
Existing mixed power automobile driving system uses the parallel or series parallel type drive system based on speed changer substantially,
Single motor or dual motors system are set i.e. between engine and speed changer.Vehicle launch, run at a low speed, run at high speed, it is anxious
When giving it the gun and braking, only a set of drive system work, therefore dynamic property and energy consumption index optimization space are smaller, it is impossible to it is simultaneous
Turn round and look at the dynamic property and economy of vehicle.
The content of the invention
The purpose of the present invention is to propose to a kind of four-wheel drive system of hybrid vehicle and hybrid vehicle, so that simultaneous
Turn round and look at the dynamic property and economy of vehicle.
The technical scheme of embodiment of the present invention is as follows：
A kind of four-wheel drive system of hybrid vehicle, including：
Front-wheel drive subsystem comprising engine, for promoting hybrid power vapour based on engine driving front wheel motion
Car；
Rear wheel drive subsystem comprising hydraulic pump motor, for being driven when hydraulic pump motor is operated in hydraulic motor operating mode
Dynamic rear wheel movement stores braking energy to promote hybrid vehicle when hydraulic pump motor is operated in hydraulic pressure pump condition.
In one embodiment, rear wheel drive subsystem includes：Inter-axle shaft；Rear brake；Decelerator；Hydraulic system
Controller；Integrated valve block；And
One or more hydraulic pump motors, are connected with decelerator, Hydraulic System Controller and integrated valve block；
Pressure oil tank, the low pressure oil for absorbing the output of one or more hydraulic pump motors in hydraulic motor operating mode, in liquid
Low pressure oil needed for one or more hydraulic pump motors is provided during press pump operating mode；
Hydraulic accumulator, the hydraulic oil needed for for providing one or more hydraulic pump motors in hydraulic motor operating mode,
The hydraulic oil of one or more hydraulic pump motors output is absorbed during hydraulic pressure pump condition.
In one embodiment, in addition to：
Front-wheel automatic hub clutch, is arranged between front propeller shaft and front-wheel, for engaging or disengaging front wheel driving mover
System；
Trailing wheel automatic hub clutch, is arranged between inter-axle shaft and trailing wheel, for engaging or disengaging rear wheel drive
System；
Entire car controller, for the operational factor based on hybrid vehicle, controls connecing for front-wheel automatic hub clutch
Conjunction action or disengagement action and the joint action of trailing wheel automatic hub clutch or disengagement action, and control front-wheel drive subsystem
Power output and rear wheel drive subsystem power output.
In one embodiment, front-wheel drive subsystem includes：Engine；Automatic transmission and wheel drag.
In one embodiment, entire car controller, for allowing to export energy signal, gear when hydraulic accumulator is provided
State is that traveling, parking braking state are when releasing, to send trailing wheel automatic hub clutch engagement command and driven with engaging rear wheels
Subsystem, when receiving accelerator pedal torque request signal again, sends the instruction of rear wheel drive subsystem work to control trailing wheel
Drives subsystem enters hydraulic motor operating mode.
In one embodiment, entire car controller, for entering hydraulic motor operating mode in control rear wheel drive subsystem
Afterwards, when automobilism speed is more than predetermined speed threshold value, after sending rear wheel drive subsystem halt instruction to control
Wheel driving subsystem stops power output, sends trailing wheel automatic hub clutch and disengages instruction to disengage rear wheel drive subsystem,
The instruction of front-wheel drive subsystem work is sent to control front-wheel drive subsystem power output, front-wheel automatic hub clutch is sent
Engagement command is to engage front-wheel drive subsystem.
In one embodiment, entire car controller, for when detecting wheel-slip via anti-lock brake system,
The instruction of rear wheel drive subsystem work is sent to control rear wheel drive subsystem to enter hydraulic motor operating mode, trailing wheel automatic wheel is sent
Side clutch engagement command sends the instruction of front-wheel drive subsystem work to control front-wheel drive with engaging rear wheels drives subsystem
Subsystem power output, sends front-wheel automatic hub clutch engagement command to engage front-wheel drive subsystem.
In one embodiment, entire car controller, for providing limitation output energy signal, gear when hydraulic accumulator
State is that traveling, parking braking state are when releasing, to send the halt instruction of rear wheel drive subsystem to control rear wheel drive subsystem
System exits hydraulic motor operating mode, sends trailing wheel automatic hub clutch and disengages instruction to disengage rear wheel drive subsystem, before sending
Automatic hub clutch engagement command is taken turns to engage front-wheel drive subsystem, when receiving accelerator pedal torque request signal again
When, the instruction of front-wheel drive subsystem work is sent to control front-wheel drive subsystem power output.
In one embodiment, entire car controller, it is automatic to front-wheel for when detecting brake pedal brake signal
Hub clutch sends front-wheel automatic hub clutch engagement command to engage front-wheel drive subsystem, with by front-wheel drive subsystem
The wheel drag work of system；After trailing wheel automatic hub clutch engagement command being sent to trailing wheel automatic hub clutch to engage
Wheel driving subsystem, hydraulic pressure pump condition is operated in the hydraulic pump motor by rear wheel drive subsystem.
A kind of hybrid vehicle, includes the four-wheel drive system of hybrid vehicle as described above.
It can be seen from the above technical proposal that the hybrid four-wheel drive system of embodiment of the present invention includes：Comprising
The front-wheel drive subsystem of engine, for promoting hybrid vehicle based on engine driving front wheel motion；Include hydraulic pressure
The rear wheel drive subsystem of pump motor, for driving rear wheel movement when hydraulic pump motor is operated in hydraulic motor operating mode to promote
Hybrid vehicle, and store braking energy when hydraulic pump motor is operated in hydraulic pressure pump condition.As can be seen here, the present invention is implemented
Mode be directed to hybrid vehicle, outside the engine drive system of prior art, also set up a set of fluid power system with
Four-wheel drive is realized, dynamic property and energy consumption index optimization space is improved, takes into account the dynamic property and economy of vehicle.
In addition, when two drives subsystems work simultaneously, embodiment of the present invention can realize wheel and drive system
Connection to drive vehicle to travel, improve vehicles dynamic performance.When only one of which drives subsystem works, corresponding wheel is certainly
Dynamic hub clutch engagement, wheel automatic hub clutch in addition is disengaged, so as to reduce running resistance reduction energy consumption.
Further, when vehicle is braked, the fluid power system work of embodiment of the present invention, high efficiency reclaims Brake Energy
Amount, reaches the purpose of reduction energy consumption.
Brief description of the drawings
The following drawings only does schematic illustration and explanation to the present invention, not delimit the scope of the invention.
Fig. 1 is the structure chart using the hybrid four-wheel drive system of hydraulic-driven according to embodiment of the present invention.
Fig. 2 is the demonstrative structure using the hybrid four-wheel drive system of hydraulic-driven according to embodiment of the present invention
Figure.
Fig. 3 is to be shown according to embodiment of the present invention using the control method of the hybrid four-wheel drive system of hydraulic-driven
It is intended to.
Embodiment
In order to be more clearly understood to the technical characteristic of invention, purpose and effect, now control brief description of the drawings is of the invention
Embodiment, in the various figures identical label represent identical part.
In order to succinct and directly perceived on describing, hereafter by describing some representational embodiments come the side to the present invention
Case is illustrated.Substantial amounts of details is only used for help and understands the solution of the present invention in embodiment.However, it will be apparent that the present invention
Technical scheme can be not limited to these details when realizing.In order to avoid unnecessarily having obscured the solution of the present invention, some realities
Apply mode not described meticulously, but only give framework.Hereinafter, " comprising " refers to " include but is not limited to ", " root
According to ... " refer to " according at least to ..., but be not limited to according only to ... ".Due to the speech habits of Chinese, hereinafter without spy
When not pointing out the quantity of composition, it is meant that it can also be multiple that the composition, which can be one, or can be regarded as at least one.
Embodiment of the present invention is directed to hybrid vehicle, outside passenger vehicle engine drive system, also sets up hydraulic pressure
The fluid power system of pump motor realizes four-wheel drive.When vehicle is braked, hydraulic pump motor works height under hydraulic pressure pump condition
Effect feeding braking energy back is stored in hydraulic accumulator, and in vehicle launch and larger vehicle power demand, hydraulic pump motor is in hydraulic pressure
Worked under motor operating conditions, vehicle is driven simultaneously with engine, improve the dynamic property of vehicle.
Moreover, embodiment of the present invention sets hub clutch on each wheel side, it is real under the different operating modes of each drive system
The connection and disconnection of existing wheel and drive system, reach the purpose for improving vehicles dynamic performance and reduction energy consumption.
Fig. 1 is the structure chart using the hybrid four-wheel drive system of hydraulic-driven according to embodiment of the present invention.
As shown in figure 1, hybrid vehicle includes two front-wheels and two trailing wheels, respectively front-wheel 1, front-wheel 2, trailing wheel
7 and trailing wheel 8.
The hybrid four-wheel drive system of hybrid vehicle includes：
Front-wheel drive subsystem 3 comprising engine 31, for based on engine 31 drive front-wheel 1 and front-wheel 2 to move with
Promote automobile；
Rear wheel drive subsystem 9 comprising hydraulic pump motor 91, for being operated in hydraulic motor work when hydraulic pump motor 91
Drive trailing wheel 7 and trailing wheel 8 to move during condition to brake to promote automobile, and store when hydraulic pump motor 91 is operated in hydraulic pressure pump condition
Energy.
Engine 31 in front-wheel drive subsystem 3 is preferably based on the engine of chemical energy fuel.Used by engine
Fuel is divided, and the engine in front-wheel drive subsystem 3 may be embodied as the classifications such as petrol engine or Diesel engine.By hair
Engine cylinder arrangement mode is divided, and the engine 31 in front-wheel drive subsystem 3 may be embodied as array, V-type, horizontally-opposed hair
Motivation etc..The discharge capacity of engine 31 is equal to each cylinder capacity sum, and increase cylinder number can increase engine displacement, and raising is started
Machine power output, can also make engine smooth running, reduce vibration and noise.
Hydraulic pump motor 91 (i.e. pump/motor), refers to the equipment for being integrated with hydraulic pressure pumping function and hydraulic motor function.Work as liquid
When press pump motor 91 is operated in hydraulic motor operating mode, play hydraulic motor；When hydraulic pump motor 91 is operated in hydraulic pressure pump condition
When, play hydraulic pressure pumping action.
In one embodiment, the hybrid four-wheel drive system also includes：
The front-wheel automatic hub clutch 4 between front propeller shaft and front-wheel 1 is arranged in, for engaging or disengaging for front-wheel 1
Front-wheel drive subsystem 3；
The front-wheel automatic hub clutch 5 between front propeller shaft and front-wheel 5 is arranged in, for engaging or disengaging for front-wheel 5
Front-wheel drive subsystem 3；
The trailing wheel automatic hub clutch 10 between inter-axle shaft and trailing wheel 7 is arranged in, for engaging or disengaging for trailing wheel 7
Rear wheel drive subsystem 9；
The trailing wheel automatic hub clutch 11 between inter-axle shaft and trailing wheel 8 is arranged in, for engaging or disengaging for trailing wheel 8
Rear wheel drive subsystem 9；
Entire car controller 6, for the operational factor based on hybrid vehicle, the He of control front-wheel automatic hub clutch 4
The joint action of front-wheel automatic hub clutch 5 or disengagement action and trailing wheel automatic hub clutch 10 and trailing wheel automatic hub from
The joint action of clutch 11 or disengagement action, and control the power output and rear wheel drive subsystem 9 of front-wheel drive subsystem 3
Power output.
In one embodiment, rear wheel drive subsystem 9 is the assistant drive system of automobile, front-wheel drive subsystem 3
For the main drive system of automobile.The peak power output of the main drive system of automobile is more than the maximum defeated of the auxiliary drive system of automobile
Go out power.
In one embodiment, front-wheel drive subsystem 3 includes：Engine 31；Automatic transmission and wheel drag.
In one embodiment, rear wheel drive subsystem 9 includes：
Inter-axle shaft；Rear brake；Decelerator；Hydraulic System Controller；Integrated valve block；One or more hydraulic pump motors,
It is connected with decelerator, Hydraulic System Controller and integrated valve block；Pressure oil tank, for absorbing one or more in hydraulic motor operating mode
The low pressure oil of individual hydraulic pump motor output, the low pressure oil needed for providing one or more hydraulic pump motors in hydraulic pressure pump condition；Liquid
Press accumulator, the hydraulic oil needed for for providing one or more hydraulic pump motors in hydraulic motor operating mode, in hydraulic pressure pump condition
When absorb one or more hydraulic pump motors output hydraulic oil.
In one embodiment, entire car controller 6, for being more than predetermined door when the hydraulic energy that hydraulic accumulator is stored
Limit value, range state are that traveling, parking braking state are when releasing, to trailing wheel automatic hub clutch 10 and trailing wheel automatic hub
Clutch 11 sends trailing wheel automatic hub clutch engagement command with engaging rear wheels drives subsystem 9 respectively, adds when receiving again
During speed pedal torque request signal, the instruction of rear wheel drive subsystem work is sent with wheel driving after controlling to rear wheel drive subsystem 9
The power output of subsystem 9, now hydraulic pump motor 91 be operated in motor operating conditions.
It can be seen that, when normal vehicle starts to walk, risen as the driving vehicle of rear wheel drive subsystem 9 of the auxiliary drive system of automobile
Step.
In one embodiment, entire car controller 6, are used for：
It is traveling, parking braking state when the hydraulic energy that hydraulic accumulator is stored is more than predetermined threshold value, range state
During to release, trailing wheel automatic hub clutch is sent respectively to trailing wheel automatic hub clutch 10 and trailing wheel automatic hub clutch 11
Device engagement command is with engaging rear wheels drives subsystem 9, to 5 points of front-wheel automatic hub clutch 4 and front-wheel automatic hub clutch
Front-wheel automatic hub clutch engagement command is not sent to engage front-wheel drive subsystem 3, when receiving accelerator pedal moment of torsion again
During request signal, send the instruction of rear wheel drive subsystem work to control rear wheel drive subsystem 9 defeated to rear wheel drive subsystem 9
Go out power, send the instruction of front-wheel drive subsystem work to control the output work of front-wheel drive subsystem 3 to front-wheel drive subsystem 3
Rate.
It can be seen that, it is used as the rear wheel drive subsystem 9 and the front wheel driving as automobile primary drive system of the auxiliary drive system of automobile
Subsystem 3 drives vehicle start jointly, and starting is accelerated so as to anxious.
In one embodiment, entire car controller 6, are used for：
It is more than predetermined load threshold value and hydraulic pressure when automobilism speed is more than predetermined speed threshold value, automobile load
When the hydraulic energy of accumulator storage is more than predetermined threshold value, the engagement of front-wheel drive subsystem is sent to front-wheel drive subsystem 3
Instruction is to control the power output of front-wheel drive subsystem 3, to front-wheel automatic hub clutch 4 and front-wheel automatic hub clutch 5
Front-wheel automatic hub clutch engagement command is sent respectively to engage front-wheel drive subsystem 3, is sent to rear wheel drive subsystem 9
Rear wheel drive subsystem work is instructed to control the power output of rear wheel drive subsystem 9, to the He of trailing wheel automatic hub clutch 10
Trailing wheel automatic hub clutch 11 sends trailing wheel automatic hub clutch engagement command with engaging rear wheels drives subsystem 9 respectively.
In one embodiment, entire car controller 6, are used for：
When automobilism speed, which is more than predetermined speed threshold value, automobile load, is less than predetermined load threshold value, to
Rear wheel drive subsystem 9 sends the halt instruction of rear wheel drive subsystem to control rear wheel drive subsystem 9 to stop power output, to
Trailing wheel automatic hub clutch 10 and trailing wheel automatic hub clutch 11 send trailing wheel automatic hub clutch and disengage instruction respectively
To disengage rear wheel drive subsystem 9, send the instruction of front-wheel drive subsystem work to control front wheel driving to front-wheel drive subsystem 3
The power output of subsystem 3, sends front-wheel automatic respectively to front-wheel automatic hub clutch 4 and front-wheel automatic hub clutch 5
Hub clutch engagement command is to engage front-wheel drive subsystem 3.
It can be seen that, embodiment of the present invention can determine type of drive when high speed is travelled based on load condition, so that
Dynamic property and energy consumption index optimization space are improved, the dynamic property and economy of vehicle is taken into account.
In one embodiment, entire car controller 6, are used for：
When detecting brake pedal brake signal, to front-wheel automatic hub clutch 4 and front-wheel automatic hub clutch 5
Front-wheel automatic hub clutch engagement command is sent respectively to engage front-wheel drive subsystem 3, to trailing wheel automatic hub clutch
10 and trailing wheel automatic hub clutch 11 send respectively trailing wheel automatic hub clutch engagement command with engaging rear wheels drive subsystem
System 9.Entire car controller 6, also sends to hydraulic pump motor and instructs, to be operated in hydraulic pressure pump condition by hydraulic pump motor.
In one embodiment, entire car controller 6, are used for：
When detecting vehicle in sliding state, send front-wheel drive subsystem to front-wheel drive subsystem 3 and stop referring to
Order is to control front-wheel drive subsystem 3 to stop power output, to front-wheel automatic hub clutch 4 and front-wheel automatic hub clutch
5 send front-wheel automatic hub clutch respectively disengages instruction to disengage front-wheel drive subsystem 3, is sent out to rear wheel drive subsystem 9
Go out the halt instruction of rear wheel drive subsystem to control rear wheel drive subsystem 9 to stop power output, to trailing wheel automatic hub clutch
Device 10 and trailing wheel automatic hub clutch 11 send trailing wheel automatic hub clutch and disengage instruction to disengage rear wheel drive respectively
System 9.
In one embodiment, entire car controller 6, are used for：
When automobilism speed less than predetermined speed threshold value, automobile load less than predetermined load threshold value and hydraulic pressure
When the hydraulic energy of accumulator storage is more than predetermined threshold value, front-wheel drive subsystem work is sent to front-wheel drive subsystem 3
Instruction is to control the power output of front-wheel drive subsystem 3, to front-wheel automatic hub clutch 4 and front-wheel automatic hub clutch 5
Front-wheel automatic hub clutch engagement command is sent respectively to engage front-wheel drive subsystem 3, is sent to rear wheel drive subsystem 9
Rear wheel drive subsystem work is instructed to control the power output of rear wheel drive subsystem 9, to the He of trailing wheel automatic hub clutch 10
Trailing wheel automatic hub clutch 11 sends trailing wheel automatic hub clutch combined command to combine rear wheel drive subsystem 9 respectively.
In one embodiment, make a reservation for when automobilism speed is less than less than predetermined speed threshold value, automobile load
Load threshold value and hydraulic accumulator storage hydraulic energy be more than predetermined threshold value when, can preferentially using hydraulic-driven son
System, and without using front-wheel drive subsystem.Such as, when automobilism speed is less than predetermined speed threshold value, automobile load
When the hydraulic energy stored less than predetermined load threshold value and hydraulic accumulator is more than predetermined threshold value, to front-wheel drive subsystem
System 3 sends the halt instruction of front-wheel drive subsystem to control front-wheel drive subsystem 3 to stop power output, to front-wheel automatic hub
Clutch 4 and front-wheel automatic hub clutch 5 send front-wheel automatic hub clutch and disengage instruction to disengage front-wheel drive respectively
Subsystem 3, sends the instruction of rear wheel drive subsystem work to control rear wheel drive subsystem 9 to export to rear wheel drive subsystem 9
Power, sends trailing wheel automatic hub clutch to trailing wheel automatic hub clutch 10 and trailing wheel automatic hub clutch 11 and connects respectively
Instruction is closed with engaging rear wheels drives subsystem 9.
In one embodiment, entire car controller 6, are used for：
When automobilism speed less than predetermined speed threshold value, automobile load more than predetermined load threshold value and hydraulic pressure
When the hydraulic energy of accumulator storage is more than predetermined threshold value, rear wheel drive subsystem work is sent to rear wheel drive subsystem 9
Instruction is to control the power output of rear wheel drive subsystem 9, to trailing wheel automatic hub clutch 10 and trailing wheel automatic hub clutch
11 send trailing wheel automatic hub clutch engagement command with engaging rear wheels drives subsystem 9 respectively, are sent out to front-wheel drive subsystem 3
Go out the halt instruction of front-wheel drive subsystem to control front-wheel drive subsystem to stop power output, to front-wheel automatic hub clutch
4 and front-wheel automatic hub clutch 5 send front-wheel automatic hub clutch respectively and disengage instruction to disengage front-wheel drive subsystem
3。
In one embodiment, make a reservation for when automobilism speed is more than less than predetermined speed threshold value, automobile load
Load threshold value and hydraulic accumulator storage hydraulic energy be less than predetermined threshold value when, preferentially using fluid power system,
And 2 sets of drive systems should be used when individual system is short of power.Specifically, when automobilism speed is less than predetermined speed
Threshold value, automobile load are more than predetermined load threshold value and the hydraulic energy of hydraulic accumulator storage is less than predetermined threshold value
When, entire car controller sends the instruction of rear wheel drive subsystem work to control rear wheel drive subsystem 9 to rear wheel drive subsystem 9
Power output, trailing wheel automatic hub clutch is sent to trailing wheel automatic hub clutch 10 and trailing wheel automatic hub clutch 11 respectively
Device engagement command with engaging rear wheels drives subsystem 9, to front-wheel drive subsystem 3 send the instruction of front-wheel drive subsystem work with
Front-wheel drive subsystem power output is controlled, is sent respectively to front-wheel automatic hub clutch 4 and front-wheel automatic hub clutch 5
Front-wheel automatic hub clutch engagement command is to engage front-wheel drive subsystem 3.
It can be seen that, embodiment of the present invention can be determined to have by which in vehicle frequent start-stop based on load situation
Drive system works, so as to ensure the dynamic property and economy of vehicle.
In one embodiment, entire car controller 6, for allowing to export energy signal, shelves when hydraulic accumulator is provided
Position state is that traveling, parking braking state are when releasing, to send trailing wheel automatic hub clutch engagement command and driven with engaging rear wheels
Subsystem, when receiving accelerator pedal torque request signal again, after sending the instruction of rear wheel drive subsystem work to control
Wheel driving subsystem enters hydraulic motor operating mode.
Herein, in vehicle start, the energy permission that Hydraulic System Controller receives the offer of hydraulic accumulator signal is defeated
Go out signal, and energy permission output signal be sent to entire car controller 6, entire car controller 6 detect drivable position signal,
Enter wheeled state after parking braking ring off signal, and hydraulic motor is sent after accelerator pedal torque request signal and work
Instruction, hydraulic pump motor enters hydraulic motor operating mode, so as to be started to walk with rear wheel drive vehicle.
In one embodiment, entire car controller 6, for entering hydraulic motor operating mode in control rear wheel drive subsystem
Afterwards, when automobilism speed is more than predetermined speed threshold value, after sending rear wheel drive subsystem halt instruction to control
Wheel driving subsystem stops power output, sends trailing wheel automatic hub clutch and disengages instruction to disengage rear wheel drive subsystem,
The instruction of front-wheel drive subsystem work is sent to control front-wheel drive subsystem power output, front-wheel automatic hub clutch is sent
Engagement command is to engage front-wheel drive subsystem.
In one embodiment, entire car controller 6, wheel-slip is detected for working as via anti-lock brake system
When, send the instruction of rear wheel drive subsystem work to control rear wheel drive subsystem to enter hydraulic motor operating mode, send trailing wheel certainly
Driving wheel side clutch engagement command sends the instruction of front-wheel drive subsystem work to control front-wheel with engaging rear wheels drives subsystem
Drives subsystem power output, sends front-wheel automatic hub clutch engagement command to engage front-wheel drive subsystem.
In one embodiment, entire car controller 6, for providing limitation output energy signal, shelves when hydraulic accumulator
Position state is that traveling, parking braking state are when releasing, to send the halt instruction of rear wheel drive subsystem to control rear wheel drive
System exits hydraulic motor operating mode, sends trailing wheel automatic hub clutch and disengages instruction to disengage rear wheel drive subsystem, sends
Front-wheel automatic hub clutch engagement command is to engage front-wheel drive subsystem, when receiving accelerator pedal torque request signal again
When, the instruction of front-wheel drive subsystem work is sent to control front-wheel drive subsystem power output.
In one embodiment, entire car controller 6, for when detecting brake pedal brake signal, to front-wheel from
Dynamic hub clutch sends front-wheel automatic hub clutch engagement command to engage front-wheel drive subsystem, with by front wheel driving mover
The wheel drag work of system；Send trailing wheel automatic hub clutch engagement command to engage to trailing wheel automatic hub clutch
Rear wheel drive subsystem, hydraulic pressure pump condition is operated in the hydraulic pump motor by rear wheel drive subsystem
It can be seen that, embodiment of the present invention can perform braking energy feedback in damped condition, front and rear in coasting mode
The drive system of wheel does not work, so as to ensure the dynamic property and economy of vehicle.
Based on the system architecture shown in Fig. 1, embodiment of the present invention can be embodied in several ways.
Fig. 2 is the demonstrative structure figure of the four-wheel drive system driven according to embodiment of the present invention using hydraulic power.
As shown in Fig. 2 the four-wheel drive system is specifically included：Hydraulic pump motor 1, hydraulic pump motor 2, hydraulic accumulator,
Pressure oil tank, integrated valve block, fluid pressure line, pressure sensor, Hydraulic System Controller and decelerator.Above-mentioned part and transmission
Axle, brake, wheel constitute drive system after vehicle.
Hydraulic System Controller, accelerator pedal and signal output apparatus, brake pedal and signal output apparatus, selector and
Signal output apparatus constitutes vehicle control system.
Hydraulic pump motor is driving execution unit.When vehicle launch and traveling, hydraulic pump motor works in motor operating conditions, by
Hydraulic oil provides power drive vehicle, when vehicle is braked, and hydraulic pump motor works in pump condition, by wheel driving output hydraulic oil
To hydraulic accumulator.
Hydraulic accumulator provides power for hydraulic pump motor and stores the energy of hydraulic pump motor feedback.Pressure oil tank is in liquid
Press pump motor absorbs the low pressure oil of motor output when motor operating conditions work, and pump is provided when pump condition works in hydraulic pump motor
Required low pressure oil.Hydraulic valve is the control unit of hydraulic pump motor, realizes that flow direction, pressure and the flow of hydraulic oil change
Become.Integrated valve block is hydraulic valve installation pedestal, and can integration section pipeline function, most of hydraulic system components are installed on this.
Such as, hydraulic control valve (including directional control valve, pressure-control valve, flow control valve) can be integrated in integrated valve block.Liquid
Pressure system controller travels demand according to vehicle and the flow direction of hydraulic system hydraulic oil, pressure and flow is entered by hydraulic valve
Row adjustment.Decelerator plays matching hydraulic pump/motor rotary speed and transmission torque, under equal torque demand, can reduce
The traffic requirement of hydraulic pump motor, can use the hydraulic pump/motor of high speed small displacement, mitigate component weight, save system into
This.
Preceding driving engine is as the main drive system of vehicle, and engine output and moment of torsion are compared with trailing wheel hydraulic pump motor
Greatly.Accelerator pedal is used to export driver demand for power；Brake pedal is used to export operator brake power demand；Selector is used for
Determine vehicle heading；ABS is used to monitor tyre skidding state.
Fig. 3 is to be shown according to embodiment of the present invention using the control method of the hybrid four-wheel drive system of hydraulic-driven
It is intended to.Based on system shown in Figure 2 structure, specific hybrid four-wheel drive control method includes：
(1), vehicle start：Hydraulic System Controller receives hydraulic accumulator signal (energy allows output), drivable position letter
Number, enter wheeled state after parking braking ring off signal, after accelerator pedal torque request signal, then send hydraulic pump motor
Work order, vehicle drives vehicle start with trailing wheel hydraulic pump motor.
(2), high speed is travelled：When vehicle drives to command speed, entire car controller instruction cache starts engine, together
When rear-wheel hydraulic drive system be stopped, engine start driving vehicle traveling；
(3), four-wheel drive：When vehicle is travelled in extreme difference road conditions in two-wheel drive mode, entire car controller is detected by ABS
When being skidded to driving moment, Hydraulic System Controller is signaled to, drive is participated in instruction rear-wheel hydraulic drive system work
Dynamic, vehicle enters 4 wheel driven pattern.
(4), damped condition：Entire car controller receives brake pedal and sent after brake signal, instructs rear-wheel hydraulic drive system
Work, starts braking energy feedback pattern.When emergency brake of vehicle or not enough hydraulic system brake force, wheel drag starts
Work.
(5), vehicle deceleration stops：Engine rapid starting/stopping switch is opened, when vehicle deceleration stops, engine stop work.
When vehicle is started to walk again, hydraulic system driving driving mode is repeated.
(6), hydraulic energy output mode is limited：Hydraulic System Controller limits hydraulic-driven mould when hydraulic energy is not enough
Formula driving vehicle.Vehicle uses engine drive mode.
The four-wheel drive system for the use hydraulic-driven electric automobile that embodiment of the present invention can be proposed is applied to respectively
In the new-energy automobile of type, including pure electric automobile (BEV), hybrid vehicle (PHEV) or fuel cell car
(FCEV), etc..
In summary, embodiment of the present invention is included using the hybrid four-wheel drive system of hydraulic-driven：Include hair
The front-wheel drive subsystem of motivation, for promoting automobile based on engine driving front wheel motion；After hydraulic pump motor
Wheel driving subsystem, for driving rear wheel movement when hydraulic pump motor is operated in hydraulic motor operating mode to promote automobile, and works as
Hydraulic pump motor stores braking energy when being operated in hydraulic pressure pump condition.Embodiment of the present invention is in existing engine drive system
Outside, also set up fluid power system to realize four-wheel drive, improve dynamic property and energy consumption index optimization space, and realize
Low cost, high efficiency and high efficiente callback braking energy.
In addition, when two drives subsystems work simultaneously, embodiment of the present invention can realize wheel and drive system
Connection to drive vehicle to travel, improve vehicles dynamic performance.When only one of which drives subsystem works, corresponding wheel is certainly
Dynamic hub clutch engagement, wheel automatic hub clutch in addition is disengaged, so as to reduce running resistance reduction energy consumption.
In addition, when vehicle is braked, the fluid power system work of embodiment of the present invention, high efficiency reclaims Brake Energy
Amount, reaches the purpose of reduction energy consumption.
Those listed above is a series of to be described in detail only for feasibility embodiment of the invention specifically
It is bright, and and be not used to limit the scope of the invention, all equivalent embodiments made without departing from skill spirit of the present invention or
Change, combination, segmentation or the repetition of such as feature, should be included in the scope of the protection.
Claims (10)
1. a kind of four-wheel drive system of hybrid vehicle, it is characterised in that including：
Front-wheel drive subsystem comprising engine, for promoting hybrid vehicle based on engine driving front wheel motion；
Rear wheel drive subsystem comprising hydraulic pump motor, after being driven when hydraulic pump motor is operated in hydraulic motor operating mode
Wheel motion stores braking energy to promote hybrid vehicle when hydraulic pump motor is operated in hydraulic pressure pump condition.
2. the four-wheel drive system of hybrid vehicle according to claim 1, it is characterised in that rear wheel drive subsystem
Including：Inter-axle shaft；Rear brake；Decelerator；Hydraulic System Controller；Integrated valve block；And
One or more hydraulic pump motors, are connected with decelerator, Hydraulic System Controller and integrated valve block；
Pressure oil tank, the low pressure oil for absorbing the output of one or more hydraulic pump motors in hydraulic motor operating mode, in hydraulic pump
Low pressure oil needed for one or more hydraulic pump motors is provided during operating mode；
Hydraulic accumulator, the hydraulic oil needed for for providing one or more hydraulic pump motors in hydraulic motor operating mode, in hydraulic pressure
The hydraulic oil of one or more hydraulic pump motors output is absorbed during pump condition.
3. the four-wheel drive system of hybrid vehicle according to claim 2, it is characterised in that also include：
Front-wheel automatic hub clutch, is arranged between front propeller shaft and front-wheel, for engaging or disengaging front-wheel drive subsystem；
Trailing wheel automatic hub clutch, is arranged between inter-axle shaft and trailing wheel, for engaging or disengaging rear wheel drive subsystem；
Entire car controller, for the operational factor based on hybrid vehicle, the engagement of control front-wheel automatic hub clutch is moved
Make or disengagement action and the joint action of trailing wheel automatic hub clutch or disengagement action, and control the defeated of front-wheel drive subsystem
Go out the power output of power and rear wheel drive subsystem.
4. the four-wheel drive system of hybrid vehicle according to claim 1, it is characterised in that front-wheel drive subsystem
Including：Engine；Automatic transmission and wheel drag.
5. the four-wheel drive system of hybrid vehicle according to claim 3, it is characterised in that
Entire car controller, for allowing to export energy signal when hydraulic accumulator is provided, range state is traveling, parking braking shape
When state is releases, trailing wheel automatic hub clutch engagement command is sent with engaging rear wheels drives subsystem, when receiving acceleration again
During pedaling torque request signal, send the instruction of rear wheel drive subsystem work to control rear wheel drive subsystem to enter hydraulic motor
Operating mode.
6. the four-wheel drive system of hybrid vehicle according to claim 5, it is characterised in that
Entire car controller, for entering in control rear wheel drive subsystem after hydraulic motor operating mode, when automobilism speed is big
When predetermined speed threshold value, send the halt instruction of rear wheel drive subsystem to control rear wheel drive subsystem to stop output work
Rate, sends trailing wheel automatic hub clutch and disengages instruction to disengage rear wheel drive subsystem, send front-wheel drive subsystem work
Instruction sends front-wheel automatic hub clutch engagement command to engage front-wheel drive to control front-wheel drive subsystem power output
Subsystem.
7. the four-wheel drive system of hybrid vehicle according to claim 3, it is characterised in that
Entire car controller, for when detecting wheel-slip via anti-lock brake system, sending rear wheel drive subsystem work
Instruct to control rear wheel drive subsystem to enter hydraulic motor operating mode, send trailing wheel automatic hub clutch engagement command to connect
Rear wheel drive subsystem is closed, the instruction of front-wheel drive subsystem work is sent to control front-wheel drive subsystem power output, sends
Front-wheel automatic hub clutch engagement command is to engage front-wheel drive subsystem.
8. the four-wheel drive system of hybrid vehicle according to claim 3, it is characterised in that
Entire car controller, for providing limitation output energy signal when hydraulic accumulator, range state is traveling, parking braking shape
When state is releases, send the halt instruction of rear wheel drive subsystem to control rear wheel drive subsystem to exit hydraulic motor operating mode, send out
Go out trailing wheel automatic hub clutch to disengage instruction to disengage rear wheel drive subsystem, send the engagement of front-wheel automatic hub clutch and refer to
Order, when receiving accelerator pedal torque request signal again, sends front-wheel drive subsystem work to engage front-wheel drive subsystem
Instruct to control front-wheel drive subsystem power output.
9. the four-wheel drive system of hybrid vehicle according to claim 3, it is characterised in that
Entire car controller, for when detecting brake pedal brake signal, front-wheel to be sent certainly to front-wheel automatic hub clutch
Driving wheel side clutch engagement command is to engage front-wheel drive subsystem, to be worked by the wheel drag of front-wheel drive subsystem,
Trailing wheel automatic hub clutch engagement command is sent with engaging rear wheels drives subsystem to trailing wheel automatic hub clutch, with by rear
The hydraulic pump motor of wheel driving subsystem is operated in hydraulic pressure pump condition.
10. a kind of hybrid vehicle, it is characterised in that four wheel drivings including hybrid vehicle as claimed in claim 1
Dynamic system.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20171017 |