CN109080613A - A kind of hydraulic regenerative braking device, braking method and system - Google Patents
A kind of hydraulic regenerative braking device, braking method and system Download PDFInfo
- Publication number
- CN109080613A CN109080613A CN201810801600.6A CN201810801600A CN109080613A CN 109080613 A CN109080613 A CN 109080613A CN 201810801600 A CN201810801600 A CN 201810801600A CN 109080613 A CN109080613 A CN 109080613A
- Authority
- CN
- China
- Prior art keywords
- pressure
- hydraulic
- braking
- hydraulic pump
- target
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/60—Regenerative braking
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a kind of hydraulic regenerative braking device, braking method and systems.By increasing electro-hydraulic proportional throttle valve in the hydraulic regenerative braking device, so as to adjust the aperture of electro-hydraulic proportional throttle valve and the discharge capacity of hydraulic pump according to the braking method and the braking system, the fast run-up of hydraulic pump is set to be depressed into target outlet end pressure, reach target requirement braking torque requirement, increase the participation of hydraulic braking, the drag friction energy loss of the control relative ease of braking process, vehicle reduces, and improves Brake energy recovery rate.
Description
Technical field
The present invention relates to Brake energy recovery technical fields, more particularly to a kind of hydraulic regenerative braking device, braking side
Method and system.
Background technique
Hydraulic hybrid dynamic automobile is that a kind of controlled by computer coordinates engine and hydraulic auxiliary drive device simultaneously
Or the hybrid vehicle of timesharing output power, it is different from power-driven mixed hybrid electric vehicle.Its essence is will have higher-energy
The main power plant of density and hydraulic auxiliary power unit with higher power density combine coordinated control, both play
Internal combustion engine stream time is long, energy supply is convenient and efficient advantage, but it is big, hydraulic to have played hydraulic drive power density
The strong advantage of accumulator fast charging and discharging ability.Especially hydraulic power system is close with respect to the fast response characteristic of heat engine and high power
Degree feature can handle the energy conversion of high-power high-frequency variation, and it is excellent more to play its in the frequent complex working condition of load variation
Gesture.
The working principle of hydraulic hybrid power system is in the braking process of vehicle, by hydraulic pump by low pressure accumulator
Oil liquid pump to high pressure accumulator, at this time due to high pressure accumulator pressure act on, hinder the rotation of hydraulic pump, thus give vehicle
Achieve the purpose that braking with resistance.The intervention of hydraulic hybrid power system can make vehicle in starting and accelerate two energy
Consume biggish saving energy in the process.When starting, power individually can be provided by accumulator, driving vehicle is reached by stationary state
When certain speed, engine is intervened again, is driven vehicle driving, is avoided engine operation in the region of fuel economy difference.Add
When fast, the torque couple that the torque of hydraulic system and engine are provided provides biggish driving force to vehicle.In this way entire
Under the operating condition of vehicle, it can make always engine operation in fuel economy region, achieve the purpose that oil-saving discharging-reducing.
Currently, what is used in domestic hydraulic hybrid dynamic automobile brake fluid system structure is mostly high-low pressure accumulator pressure difference
Braking torque is provided.When severity of braking is 0.1, braking system can provide brake force by hydraulic system completely, at this time height
The minimum operating pressure for pressing accumulator is definite value, in the case where limiting severity of braking lower than 0.1, energy regenerating effect.It is hydraulic
In braking process, due to the influence of voltage built-up rate, system cannot select the accumulator of large volume, if the volume of accumulator is excessive,
Demand is not achieved in voltage built-up rate in braking process.But the accumulator of small size easily reaches the accumulation of energy upper limit, and braking system is complete at this time
By mechanical braking, extra braking energy is consumed in the form of mechanical friction, causes energy dissipation, more bulky accumulator
The total value that recovers energy is low.It can be seen that the maximum braking force of traditional hydraulic regenerative braking system fully rely in energy storage pressure and
The displacement variation of hydraulic pump/motor, system voltage built-up rate is slow, under higher severity of braking, it is necessary to use composite braking, shadow
Ring the recycling of braking energy.
Summary of the invention
The object of the present invention is to provide a kind of hydraulic regenerative braking device, braking method and systems, to solve conventional hydraulic
The technical problem that regenerative braking mode voltage built-up rate is slow, braking process is complicated, Brake energy recovery rate is low.
To achieve the above object, the present invention provides following schemes:
A kind of hydraulic regenerative braking device, the hydraulic regenerative braking device include: engine, gearbox, power coupling
Device, drive axle, brake pedal, controller, electromagnetic clutch, low pressure accumulator, oil filter, overflow valve, hydraulic pump, electric-hydraulic proportion
Throttle valve and high pressure accumulator；
The output end of the engine is sequentially connected the gearbox and the power coupler；The power coupler
First output end connects the drive axle；The second output terminal of the power coupler is sequentially connected the electromagnetic clutch and institute
State hydraulic pump；The A connector of the hydraulic pump is sequentially connected the oil filter and the low pressure accumulator；The B of the hydraulic pump
Connector is sequentially connected the electro-hydraulic proportional throttle valve and the high pressure accumulator；The B connector of the hydraulic pump also sets up institute
Overflow valve is stated, the overflow port of the overflow valve is connect by the oil filter with the low pressure accumulator.
Optionally, the hydraulic regenerative braking device further include: velocity sensor, first pressure sensor, second pressure
Sensor and third pressure sensor；
The signal acquisition terminal of the velocity sensor is connect with the drive axle；The signal output end of the velocity sensor
It is connect with the first signal input part of the controller；Second letter of the signal output end of the brake pedal and the controller
The connection of number input terminal；The signal acquisition terminal of the first pressure sensor is connect with the pressure output end of the low pressure accumulator；
The signal output end of the first pressure sensor is connect with the third signal input part of the controller；The second pressure passes
The signal acquisition terminal of sensor is connect with the outlet end of the hydraulic pump；The signal output end of the second pressure sensor with it is described
The fourth signal input terminal of controller connects；The signal acquisition terminal of the third pressure sensor and the pressure of the high pressure accumulator
The connection of power output end；The signal output end of the third pressure sensor is connect with the 5th signal input part of the controller.
The present invention also provides a kind of braking method of hydraulic regenerative braking device, the braking method is applied to the liquid
Regenerative braking device is pressed, the braking method includes:
The controller obtains the angular displacement signal of the brake pedal；
The target outlet end pressure of the hydraulic pump is determined according to the angular displacement signal；
Obtain the practical outlet pressures at the hydraulic pump outlet end of the second pressure sensor acquisition；
Opening for the electro-hydraulic proportional throttle valve is controlled according to the target outlet end pressure and the practical outlet pressures
The discharge capacity of degree and the hydraulic pump, makes current brake torque meet target requirement braking torque.
Optionally, described to determine that the target outlet end pressure of the hydraulic pump specifically includes according to the angular displacement signal:
Severity of braking signal is determined according to the angular displacement signal；
The target requirement braking torque of hydraulic pump is determined according to the severity of braking signal；
The target requirement pressure difference at the hydraulic pump both ends is determined according to the target requirement braking torque；
Obtain the pressure of the low pressure accumulator of the first pressure sensor acquisition；
The target outlet of the hydraulic pump is determined according to the pressure of the target requirement pressure difference and the low pressure accumulator
End pressure.
Optionally, described according to the target outlet end pressure and the practical outlet pressures control the electric-hydraulic proportion
The discharge capacity of the aperture of throttle valve and the hydraulic pump makes current brake torque meet target requirement braking torque, specifically includes:
Judge whether the practical outlet pressures are less than the target outlet end pressure, obtains the first judging result；
If first judging result is the practical outlet pressures less than the target outlet end pressure, described in maintenance
The aperture of hydraulic pump is maximum, turns the aperture of the electro-hydraulic proportional throttle valve down according to the target outlet end pressure, makes currently to make
Dynamic torque meets target requirement braking torque；
If first judging result is that the practical outlet pressures are not less than the target outlet end pressure, institute is judged
Whether the aperture for stating electro-hydraulic proportional throttle valve is maximum rating, obtains the second judging result；
The aperture of the electro-hydraulic proportional throttle valve and the discharge capacity of the hydraulic pump are controlled according to second judging result, are made
Current brake torque meets target requirement braking torque.
Optionally, described that the aperture of the electro-hydraulic proportional throttle valve and described hydraulic is controlled according to second judging result
The discharge capacity of pump makes current brake torque meet target requirement braking torque, specifically includes:
If the aperture that second judging result is the electro-hydraulic proportional throttle valve is maximum rating, gone out according to the target
Mouth end pressure reduces the discharge capacity of the hydraulic pump, and current brake torque is made to meet target requirement braking torque；
If the aperture that second judging result is the electro-hydraulic proportional throttle valve is not maximum rating, maintain described hydraulic
The aperture of pump is maximum, increases the aperture of the electro-hydraulic proportional throttle valve, current brake torque is made to meet target requirement braking torque.
The present invention also provides a kind of braking system for hydraulic regenerative braking device, the braking system includes:
Angular displacement signal obtains module, for obtaining the angular displacement signal of the brake pedal；
Target outlet end pressure determining module, for determining the target outlet of the hydraulic pump according to the angular displacement signal
End pressure；
Practical outlet pressures obtain module, for obtaining the hydraulic pump outlet of the second pressure sensor acquisition
The practical outlet pressures at end；
Control module, for controlling the electro-hydraulic ratio according to the target outlet end pressure and the practical outlet pressures
The example aperture of throttle valve and the discharge capacity of the hydraulic pump, make current brake torque meet target requirement braking torque.
Optionally, the target outlet end pressure determining module specifically includes:
Severity of braking determination unit, for determining severity of braking signal according to the angular displacement signal；
Target requirement braking torque determination unit, for determining the target requirement of hydraulic pump according to the severity of braking signal
Braking torque；
Pressure difference determination unit, for determining the target need at the hydraulic pump both ends according to the target requirement braking torque
Seek pressure difference；
Low pressure accumulator pressure acquiring unit, for obtaining the low pressure accumulator of the first pressure sensor acquisition
Pressure；
Target outlet end pressure determination unit, for the pressure according to the target requirement pressure difference and the low pressure accumulator
Power determines the target outlet end pressure of the hydraulic pump.
Optionally, the control module specifically includes:
First judging unit is obtained for judging whether the practical outlet pressures are less than the target outlet end pressure
Obtain the first judging result；
First adjusts unit, for going out when first judging result is less than the target for the practical outlet pressures
When mouth end pressure, maintains the aperture of the hydraulic pump maximum, the electric-hydraulic proportion section is turned down according to the target outlet end pressure
The aperture for flowing valve, makes current brake torque meet target requirement braking torque；
Second judgment unit, for being that the practical outlet pressures are not less than the target when first judging result
When outlet pressures, judge whether the aperture of the electro-hydraulic proportional throttle valve is maximum rating, obtains the second judging result；
Control submodule, for controlling the aperture of the electro-hydraulic proportional throttle valve and described according to second judging result
The discharge capacity of hydraulic pump makes current brake torque meet target requirement braking torque.
Optionally, the control submodule specifically includes:
Second adjusts unit, for being maximum shape when the aperture that second judging result is the electro-hydraulic proportional throttle valve
When state, reduces the discharge capacity of the hydraulic pump according to the target outlet end pressure, current brake torque is made to meet target requirement system
Dynamic torque；
Third adjusts unit, for not being maximum when the aperture that second judging result is the electro-hydraulic proportional throttle valve
It when state, maintains the aperture of the hydraulic pump maximum, increases the aperture of the electro-hydraulic proportional throttle valve, keep current brake torque full
Foot-eye demand braking torque.
The specific embodiment provided according to the present invention, the invention discloses following technical effects:
The present invention provides a kind of hydraulic regenerative braking device, braking method and system, by the hydraulic regenerative braking
Increase electro-hydraulic proportional throttle valve in device, so as to adjust electro-hydraulic proportional throttle valve according to the braking method and braking system
The discharge capacity of aperture and hydraulic pump makes the fast run-up of hydraulic pump be depressed into target outlet end pressure, reaches target requirement braking torque requirement,
The participation of hydraulic braking is increased, the drag friction energy loss of the control relative ease of braking process, vehicle reduces, and mentions
High Brake energy recovery rate.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram of hydraulic regenerative braking device provided by the invention；
Fig. 2 is the method flow diagram of the braking method of hydraulic regenerative braking device provided by the invention；
Fig. 3 is the hydraulic regenerative braking process schematic of hydraulic regenerative braking device provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram provided by the present invention for the braking system of hydraulic regenerative braking device.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of hydraulic regenerative braking device, braking method and systems, to solve conventional hydraulic
The technical problem that regenerative braking mode voltage built-up rate is slow, braking process is complicated, Brake energy recovery rate is low.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is the structural schematic diagram of hydraulic regenerative braking device provided by the invention.Referring to Fig. 1, liquid provided by the invention
Pressure regenerative braking device include: engine 1, gearbox 2, power coupler 3, velocity sensor 4, drive axle 5, brake pedal 6,
Controller 7, electromagnetic clutch 8, low pressure accumulator 9, oil filter 10, first pressure sensor 11, overflow valve 12, hydraulic pump 13,
Second pressure sensor 14, electro-hydraulic proportional throttle valve 15, third pressure sensor 16 and high pressure accumulator 17.
The output end of the engine 1 is sequentially connected the gearbox 2 and the power coupler 3.The power coupling
First output end of device 3 connects the drive axle 5.The second output terminal of the power coupler 3 be sequentially connected the electromagnetism from
Clutch 8 and the hydraulic pump 13.The A connector of the hydraulic pump 13 is sequentially connected the oil filter 10 and the low pressure accumulator
9.The B connector of the hydraulic pump 13 is sequentially connected the electro-hydraulic proportional throttle valve 15 and the high pressure accumulator 17.The liquid
The B connector of press pump 13 also sets up the overflow valve 12, the overflow port of the overflow valve 12 by the oil filter 10 with it is described
Low pressure accumulator 9 connects.
The signal acquisition terminal of the velocity sensor 4 is connect with the drive axle 5.The signal of the velocity sensor 4 is defeated
Outlet is connect with the first signal input part of the controller 7.The signal output end of the brake pedal 6 and the controller 7
Second signal input terminal connection.
The signal acquisition terminal of the first pressure sensor 11 is connect with the pressure output end of the low pressure accumulator 9, is used
In the pressure for acquiring the low pressure accumulator 9.The of the signal output end of the first pressure sensor 11 and the controller 7
Three signal input parts connection, for the pressure of the low pressure accumulator to be sent to the controller 7.
The signal acquisition terminal of the second pressure sensor 14 is connect with the outlet end of the hydraulic pump 13, for acquiring
State the practical outlet pressures of hydraulic pump 13.The of the signal output end of the second pressure sensor 14 and the controller 7
Four signal input parts connection, for the practical outlet pressures to be sent to the controller 7.
The signal acquisition terminal of the third pressure sensor 16 is connect with the pressure output end of the high pressure accumulator 17, is used
In the pressure for acquiring the high pressure accumulator 17.The signal output end of the third pressure sensor 16 and the controller 7
5th signal input part connection, for the pressure of the high pressure accumulator to be sent to the controller 7.
In the present invention, the hydraulic braking torque in braking process rotates hydraulic pump 13 from high pressure accumulator pressure 17
Inhibition.And in conventional hydraulic regeneration brake system, it is by the pressure difference at 13 both ends of hydraulic pump, i.e. high pressure accumulator 17 is initial
The pressure difference of pressure and 9 initial pressure of low pressure accumulator, to provide brake force for vehicle.Its working principle is as shown by the following formula:
The braking torque of wheel are as follows:
Tv=Fr (1)
Wherein F is wheel braking force, unit N；R is radius of wheel, unit m.
F=ma (2)
Wherein m is the quality of vehicle, unit kg；A is braking acceleration, unit m/s2。
It is transmitted to the demand braking torque T ' of hydraulic pump 13pAre as follows:
In formula, i0For final driver ratio；imFor torque couplings transmission ratio.
The relationship of hydraulic pump 13 torque and its both ends pressure difference are as follows:
Δ p=PH-PL (5)
In formula, Δ p is the pressure difference at any time hydraulic pump both ends, unit MPa；VgFor the discharge capacity of hydraulic pump, unit
For ml/r；PHFor high pressure accumulator pressure, unit MPa；PLFor the pressure of low pressure accumulator, unit MPa.
When the insufficient pressure of high pressure accumulator 17 is to provide demand braking torque T 'pWhen, only brake force is provided by accumulator
Conventional hydraulic hybrid vehicle, the participation of mechanical braking is needed, into composite braking mode.And it is provided by the invention novel
Hydraulic regenerative braking device in, can by adjust electro-hydraulic proportional throttle valve 15 aperture, pass through electromagnetic proportion throttle 15
Pressure function is built in throttling makes the oil liquid pressure between hydraulic pump 13 and electro-hydraulic proportional throttle valve 15 increase sharply, i.e. 13 both ends of hydraulic pump
Pressure differential deltap p is increased rapidly, to obtain demand braking torque.In device i.e. provided by the invention, pressure differential deltap p becomes electric-hydraulic proportion
High pressure end pressure (the P of throttle valve 15t) with the pressure (P of low pressure accumulator 9L) make poor, i.e. Δ p=Pt-PL, P at this timetIt can be by
It is adjusted according to the needs of severity of braking.In braking process, adjusted at any time by control 15 aperture of electro-hydraulic proportional throttle valve
Demand pressure meets hydraulic system needs.Meanwhile the initial pressure by changing accumulator, to optimize the recycling of braking energy
Effect.
In novel hydraulic regenerative braking device provided by the invention, the hydraulic pump 13 can braked in four-quadrant operation
Braking member is used and served as pump in the process, provides hydraulic braking force for vehicle, pump both ends pressure difference determines the big of brake force
It is small.Under conditions of pumpage is constant, the hydraulic braking torque of vehicle pumps the braking torque provided a system to, need to meet with
The pressure difference at pump both ends increase and the rule that increases.The hydraulic pump 13 uses during driving as motor, can be independent
Driving vehicle start provides additional power for vehicle acceleration.
The overflow valve 12 is the component in protective device when device pressure is more than the limiting pressure of device element,
Overflow valve 12 is opened, part oil liquid is flow back into low pressure accumulator 9.Meanwhile overflow valve 12 also has pressure maintaining effect, maintains device system
Pressure needed for power.
The power coupler 8 is torque couplings, and when braking, the braking torque of drive axle 5 is passed to hydraulic pump 13.
When driving, the torque of engine 1 is passed to drive axle 5 by the power coupler 8, or by 1 torque of engine and motor 13
Drive axle 5 is passed to after torque couple.
The electro-hydraulic proportional throttle valve 15 is between hydraulic pump 13 and high pressure accumulator 17, in braking process, works as height
When pressing the insufficient pressure of accumulator 17 to maintain demand braking torque, the aperture of electro-hydraulic proportional throttle valve 15 is adjusted, by electro-hydraulic
Pressure function is built in the throttling of proportional throttle valve 15 makes the oil liquid pressure between hydraulic pump 13 and electro-hydraulic proportional throttle valve 15 increase sharply,
That is 13 both ends pressure difference of hydraulic pump increases rapidly, to obtain demand braking torque.The discharge capacity and electro-hydraulic proportional throttle valve of hydraulic pump 13
The control process of 15 aperture is as follows:
1) when practical outlet end (B mouthfuls) pressure of the hydraulic pump 13 is less than target outlet end (B mouthfuls) pressure, according to working as
Preceding speed, severity of braking and energy storage pressure state parameter judge the size of control amount, maintain the aperture of hydraulic pump 13 maximum,
The aperture for turning electro-hydraulic proportional throttle valve 15 down makes current brake torque meet target requirement braking torque；
2) when the practical outlet pressures of hydraulic pump 13 are greater than target outlet end pressure, and electro-hydraulic proportional throttle valve 15 is opened
When degree is not maximum rating, then according to current vehicle speed, severity of braking and energy storage pressure state parameter, the big of control amount is judged
It is small, it maintains the aperture of hydraulic pump 13 maximum, increases the aperture of electro-hydraulic proportional throttle valve 15, current brake torque is made to meet target need
Seek braking torque；
3) when the practical outlet pressures of hydraulic pump/motor 13 are greater than target outlet end pressure, and electro-hydraulic proportional throttle valve
When 15 aperture is transferred to maximum, then according to current vehicle speed, severity of braking and energy storage pressure state parameter, the big of control amount is judged
It is small, reduce the discharge capacity of the hydraulic pump 13, current brake torque is made to meet target requirement braking torque.
As it can be seen that in hydraulic regenerative braking device provided by the invention, by the intervention of the electro-hydraulic proportional throttle valve 15,
In braking process, the decoupling between energy storage pressure and hydraulic system regeneration braking capacity is realized.Electric-hydraulic proportion throttling is added
After valve 15, the acquisition of demand brake force no longer place one's entire reliance upon energy storage pressure (high pressure accumulator 17 and low pressure accumulator 9
Pressure difference) and hydraulic pump/motor 13 discharge capacity, but by adjust electro-hydraulic proportional throttle valve 15 aperture, in hydraulic pump 13
High-voltage end (between hydraulic pump oil outlet and electro-hydraulic proportional throttle valve oil inlet) obtains the pressure of demand, this process is without being limited to
The pressure of high pressure accumulator.
The blowing pressure of the high pressure accumulator 17 is also no longer that must satisfy hydraulic system when severity of braking is 0.1 to provide
Demand brake force.In conventional hydraulic regeneration brake system, when severity of braking is 0.1, by the initial pressure of high pressure accumulator 17
Brake force is provided with the pressure difference of the initial pressure of low pressure accumulator 9.The present invention is added after the electro-hydraulic proportional throttle valve 15, liquid
Pressure regenerative braking device was then not required to consider high-low pressure accumulator initial pressure problem in the design phase, simplified hydraulic regenerative braking
The design complexities of device.
The present invention also provides a kind of braking method of hydraulic regenerative braking device, the braking method is applied to the liquid
Press regenerative braking device.When the vehicle is braked, drive axle 5 drives the rotation of hydraulic pump 13, hydraulic pump 13 by power coupler 3
Rotation pumps the oil liquid of low pressure accumulator 9 into high pressure accumulator 17.The pressure and electric-hydraulic proportion of high pressure accumulator 17 throttle
The inhibition that the aperture of valve 15 flows oil liquid forms the drag effect rotated to hydraulic pump 13, i.e., provides to drive axle 5
Brake force.According to the requirement of severity of braking, in conjunction with the aperture for the discharge capacity and electro-hydraulic proportional throttle valve 15 for adjusting hydraulic pump 13
Rationally to control the size of braking torque.In braking process, the controller 7 receives first pressure sensor 11, second respectively
The tach signal of pressure signal, the acquisition of speed probe 4 that pressure sensor 14, third pressure sensor 16 acquire and braking
The angular displacement signal of pedal 6, and angular displacement signal is converted to severity of braking signal.After controller 7 handles each signal,
Control signal is passed into controlled device, comprising: electromagnetic clutch 8, hydraulic pump 13, electro-hydraulic proportional throttle valve 15.
Specifically, Fig. 2 is the method flow diagram of the braking method of hydraulic regenerative braking device provided by the invention.Referring to figure
2, the braking method includes:
Step 201: the controller obtains the angular displacement signal of the brake pedal.
Step 202: the target outlet end pressure of the hydraulic pump is determined according to the angular displacement signal.It specifically includes:
Severity of braking signal Z is determined according to the angular displacement signal；
The target requirement braking torque T ' of hydraulic pump is determined according to the severity of braking signal Zp；
The target requirement pressure differential Δ p at the hydraulic pump both ends is determined according to the target requirement braking torque；Enable Tp=
T′p, the target requirement pressure differential Δ p at the hydraulic pump both ends is calculated using formula (4)；
Obtain the pressure P of the low pressure accumulator of the first pressure sensor acquisitionL；
According to the pressure of the target requirement pressure difference and the low pressure accumulator, using formula Δ p=Pt'-PLDetermine institute
State the target outlet end pressure P of hydraulic pumpt'。
Step 203: obtaining the practical outlet pressures at the hydraulic pump outlet end of the second pressure sensor acquisition
Pt。
Step 204: the electric-hydraulic proportion section is controlled according to the target outlet end pressure and the practical outlet pressures
The aperture of valve and the discharge capacity of the hydraulic pump are flowed, current brake torque is made to meet target requirement braking torque.It specifically includes:
Judge the practical outlet pressures PtWhether the target outlet end pressure P is less thant', obtain the first judgement knot
Fruit.
If first judging result is the practical outlet pressures less than the target outlet end pressure, described in maintenance
The aperture of hydraulic pump is maximum, according to the target outlet end pressure Pt' turn the aperture of the electro-hydraulic proportional throttle valve down, make current
Braking torque meets target requirement braking torque.
If first judging result is that the practical outlet pressures are not less than the target outlet end pressure, institute is judged
Whether the aperture for stating electro-hydraulic proportional throttle valve is maximum rating, obtains the second judging result；
If the aperture that second judging result is the electro-hydraulic proportional throttle valve is maximum rating, gone out according to the target
Mouth end pressure Pt' reduce the discharge capacity of the hydraulic pump, so that current brake torque is met target requirement braking torque.
If the aperture that second judging result is the electro-hydraulic proportional throttle valve is not maximum rating, maintain described hydraulic
The aperture of pump is maximum, increases the aperture of the electro-hydraulic proportional throttle valve, current brake torque is made to meet target requirement braking torque.
It is (mechanical that the braking mode of the hydraulic regenerative braking device can be divided into purely mechanic braking mode, composite braking mode
Braking and hydraulic braking simultaneously participate in) and pure hydraulic regenerative braking mode.Fig. 3 is hydraulic regenerating system provided in an embodiment of the present invention
The hydraulic regenerative braking process schematic of dynamic device, specifically includes the following steps:
As severity of braking Z > 0.7, the controller 7 is judged as emergency braking, disconnects electromagnetic clutch 8, hydraulic braking
It is not involved in, carries out purely mechanic braking mode；
As severity of braking Z < 0.7, electromagnetic clutch 8 is engaged, and controller 7 is sentenced according to the variation in angular displacement of brake pedal 6
Disconnected current goal demand brake force.Meanwhile controller 7 will come from pressure sensor 11,14,16 and the acquisition of velocity sensor 4
Signal judged.According to accumulator parameter, electro-hydraulic proportional throttle valve parameter and vehicle parameter etc., judge that hydraulic system is independent
Under conditions of brake force is provided and guarantees system safety, the maximum braking force that pressure system can provide, if hydraulic system is most at this time
The big corresponding severity of braking of brake force is Zt, then:
When severity of braking meets ZtWhen < Z < 0.7, if controller 7 judges that the limit brake force of hydraulic system cannot meet vehicle
The demand of brake force, the then maximum braking force that can be provided hydraulic system remove, and insufficient part is provided by mechanical braking,
Composite braking is carried out at this time；
When severity of braking meets Z < ZtWhen, it is pure hydraulic regenerative braking mode.The work of the pure hydraulic regenerative braking mode
It is as follows to make mode:
When the corresponding severity of braking of brake force that the pressure energy of accumulator provides is less than ZtWhen, the discharge capacity of hydraulic pump 13 is transferred to
Maximum adjusts the aperture of electro-hydraulic proportional throttle valve 15, to meet the needs of brake force；With the increase of energy storage pressure, work as storage
When energy device pressure meets the needs of reaching brake force, the aperture of electro-hydraulic proportional throttle valve 15 is transferred to maximum, it is hydraulic by adjusting
13 discharge capacity is pumped to meet the requirement of brake force；
When the corresponding severity of braking of brake force that the pressure energy of accumulator provides is equal to ZtWhen, by electro-hydraulic proportional throttle valve 15
Standard-sized sheet adjusts the discharge capacity of hydraulic pump 13 to meet the requirement of brake force；
When the corresponding severity of braking of brake force that the pressure energy of accumulator provides is greater than ZtWhen, by electro-hydraulic proportional throttle valve 15
Standard-sized sheet adjusts the discharge capacity of hydraulic pump 13 to meet the requirement of brake force；The pressure if energy storage pressure reaches capacity, hydraulic pump 13
The extra oil liquid of discharge overflows back low pressure accumulator 9 by overflow valve 12.
The maximum braking force of traditional hydraulic regeneration system fully relies on the row in energy storage pressure and hydraulic pump/motor
Amount variation, system voltage built-up rate is slow, under higher severity of braking, it is necessary to use composite braking, influence returning for braking energy
It receives；And the control process of composite braking is relative complex, poor reliability.And the present invention passes through in conventional hydraulic regeneration brake system base
Increase electro-hydraulic proportional throttle valve on plinth, by adjusting its aperture, fast run-up is depressed into goal pressure, reaches braking torque requirement, increases
The big participation of hydraulic braking, the drag friction energy loss of the control relative ease of braking process, vehicle are reduced, are effectively mentioned
The high energy recovery rate of accumulator.
The present invention also provides a kind of braking system for hydraulic regenerative braking device, the braking system is for hydraulic
Hybrid vehicle.Fig. 4 is the structural schematic diagram provided by the present invention for the braking system of hydraulic regenerative braking device.Referring to
Fig. 4, the braking system include:
Angular displacement signal obtains mould 401, for obtaining the angular displacement signal of the brake pedal.
Target outlet end pressure determining module 402, for determining the target of the hydraulic pump according to the angular displacement signal
Outlet pressures.
Practical outlet pressures obtain module 403, for obtaining the hydraulic pump of the second pressure sensor acquisition
The practical outlet pressures of outlet end.
Control module 404, for controlling the electricity according to the target outlet end pressure and the practical outlet pressures
The discharge capacity of the aperture of liquid proportional throttle valve and the hydraulic pump makes current brake torque meet target requirement braking torque.
Wherein, 402 determining module of target outlet end pressure specifically includes:
Severity of braking determination unit, for determining severity of braking signal according to the angular displacement signal.
Target requirement braking torque determination unit, for determining the target requirement of hydraulic pump according to the severity of braking signal
Braking torque.
Pressure difference determination unit, for determining the target need at the hydraulic pump both ends according to the target requirement braking torque
Seek pressure difference.
Low pressure accumulator pressure acquiring unit, for obtaining the low pressure accumulator of the first pressure sensor acquisition
Pressure.
Target outlet end pressure determination unit, for the pressure according to the target requirement pressure difference and the low pressure accumulator
Power determines the target outlet end pressure of the hydraulic pump.
The control module 404 specifically includes:
First judging unit is obtained for judging whether the practical outlet pressures are less than the target outlet end pressure
Obtain the first judging result.
First adjusts unit, for going out when first judging result is less than the target for the practical outlet pressures
When mouth end pressure, maintains the aperture of the hydraulic pump maximum, the electric-hydraulic proportion section is turned down according to the target outlet end pressure
The aperture for flowing valve, makes current brake torque meet target requirement braking torque.
Second judgment unit, for being that the practical outlet pressures are not less than the target when first judging result
When outlet pressures, judge whether the aperture of the electro-hydraulic proportional throttle valve is maximum rating, obtains the second judging result.
Control submodule, for controlling the aperture of the electro-hydraulic proportional throttle valve and described according to second judging result
The discharge capacity of hydraulic pump makes current brake torque meet target requirement braking torque.
The control submodule specifically includes:
Second adjusts unit, for being maximum shape when the aperture that second judging result is the electro-hydraulic proportional throttle valve
When state, reduces the discharge capacity of the hydraulic pump according to the target outlet end pressure, current brake torque is made to meet target requirement system
Dynamic torque.
Third adjusts unit, for not being maximum when the aperture that second judging result is the electro-hydraulic proportional throttle valve
It when state, maintains the aperture of the hydraulic pump maximum, increases the aperture of the electro-hydraulic proportional throttle valve, keep current brake torque full
Foot-eye demand braking torque.
As it can be seen that hydraulic regenerative braking device, braking method and system provided by the invention are compared with prior art, at least have
It has the advantage that
1, in the biggish situation of target requirement brake force, energy storage pressure and hydraulic pump/motor discharge capacity are relied solely on
The demand for not being able to satisfy Braking system torque is adjusted, it at this time can be by adjusting electro-hydraulic proportional throttle valve aperture, to meet larger system
The demand of power.Hydraulic regenerative braking device, braking method and system provided by the invention run-up can be depressed into goal pressure fastly,
Reach braking torque requirement, increases the participation of hydraulic braking, the control relative ease of braking process, the drag friction of vehicle
Energy loss reduces.
2, due to the intervention of electro-hydraulic proportional throttle valve, in braking process, energy storage pressure and hydraulic system are realized again
Decoupling between raw stopping power.It is added after electro-hydraulic proportional throttle valve (15), the acquisition of demand brake force is no longer completely dependent on
In the discharge capacity of energy storage pressure (pressure difference of high pressure accumulator 17 and low pressure accumulator 9) and hydraulic pump/motor 13, pass through adjusting
The aperture of electro-hydraulic proportional throttle valve 15, in high-voltage end (hydraulic pump oil outlet and the electro-hydraulic proportional throttle valve oil inlet of hydraulic pump 13
Between) pressure of demand is obtained, without being limited to the pressure of high pressure accumulator.Therefore addition electric-hydraulic proportion provided by the invention
The novel hydraulic regenerative braking device of throttle valve was not required to consider the problems of the initial pressure of high pressure accumulator in the design phase.Tradition
Hydraulic regenerative braking system in, when severity of braking is 0.1, high pressure accumulator initial pressure and low pressure accumulator initial pressure
Pressure difference provide brake force.Therefore, reasonable charging pressure of accumulator can be selected according to operating condition, to optimize the effect of energy regenerating
Fruit.
It 3, can discharge capacity and electro-hydraulic proportional throttle valve aperture to hydraulic pump/motor due to the addition of electro-hydraulic proportional throttle valve
Carry out joint regulation and control, optimize energy regenerating.Meanwhile the braking torque that hydraulic accumulating device provides is as vehicle braking
Main braking energy source, reduce the drag friction energy loss of vehicle, and engine and hydraulic accumulating device composition is mixed
Vehicle operation can be made in the economy mode by closing dynamical system, so that vehicle adapts to different road conditions, realize the purpose of fuel-economizing.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For system disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of hydraulic regenerative braking device, which is characterized in that the hydraulic regenerative braking device include: engine, gearbox,
Power coupler, drive axle, brake pedal, controller, electromagnetic clutch, low pressure accumulator, oil filter, overflow valve, hydraulic pump,
Electro-hydraulic proportional throttle valve and high pressure accumulator；
The output end of the engine is sequentially connected the gearbox and the power coupler；The first of the power coupler
Output end connects the drive axle；The second output terminal of the power coupler is sequentially connected the electromagnetic clutch and the liquid
Press pump；The A connector of the hydraulic pump is sequentially connected the oil filter and the low pressure accumulator；The B connection of the hydraulic pump
Mouth is sequentially connected the electro-hydraulic proportional throttle valve and the high pressure accumulator；The B connector of the hydraulic pump also sets up described overflow
Valve is flowed, the overflow port of the overflow valve is connect by the oil filter with the low pressure accumulator.
2. hydraulic regenerative braking device according to claim 1, which is characterized in that the hydraulic regenerative braking device also wraps
It includes: velocity sensor, first pressure sensor, second pressure sensor and third pressure sensor；
The signal acquisition terminal of the velocity sensor is connect with the drive axle；The signal output end of the velocity sensor and institute
State the first signal input part connection of controller；The signal output end of the brake pedal and the second signal of the controller are defeated
Enter end connection；The signal acquisition terminal of the first pressure sensor is connect with the pressure output end of the low pressure accumulator；It is described
The signal output end of first pressure sensor is connect with the third signal input part of the controller；The second pressure sensor
Signal acquisition terminal connect with the outlet end of the hydraulic pump；The signal output end of the second pressure sensor and the control
The fourth signal input terminal of device connects；The signal acquisition terminal of the third pressure sensor and the pressure of the high pressure accumulator are defeated
Outlet connection；The signal output end of the third pressure sensor is connect with the 5th signal input part of the controller.
3. a kind of braking method of hydraulic regenerative braking device, which is characterized in that the braking method is applied to claim 2 institute
A kind of hydraulic regenerative braking device stated, the braking method include:
The controller obtains the angular displacement signal of the brake pedal；
The target outlet end pressure of the hydraulic pump is determined according to the angular displacement signal；
Obtain the practical outlet pressures at the hydraulic pump outlet end of the second pressure sensor acquisition；
According to the target outlet end pressure and the practical outlet pressures control the electro-hydraulic proportional throttle valve aperture and
The discharge capacity of the hydraulic pump makes current brake torque meet target requirement braking torque.
4. braking method according to claim 3, which is characterized in that described to determine the liquid according to the angular displacement signal
The target outlet end pressure of press pump specifically includes:
Severity of braking signal is determined according to the angular displacement signal；
The target requirement braking torque of hydraulic pump is determined according to the severity of braking signal；
The target requirement pressure difference at the hydraulic pump both ends is determined according to the target requirement braking torque；
Obtain the pressure of the low pressure accumulator of the first pressure sensor acquisition；
The target outlet side pressure of the hydraulic pump is determined according to the pressure of the target requirement pressure difference and the low pressure accumulator
Power.
5. braking method according to claim 4, which is characterized in that described according to the target outlet end pressure and described
Practical outlet pressures control the aperture of the electro-hydraulic proportional throttle valve and the discharge capacity of the hydraulic pump, keep current brake torque full
Foot-eye demand braking torque, specifically includes:
Judge whether the practical outlet pressures are less than the target outlet end pressure, obtains the first judging result；
If first judging result is that the practical outlet pressures are less than the target outlet end pressure, maintain described hydraulic
The aperture of pump is maximum, turns the aperture of the electro-hydraulic proportional throttle valve down according to the target outlet end pressure, turns round current brake
Square meets target requirement braking torque；
If first judging result is that the practical outlet pressures are not less than the target outlet end pressure, the electricity is judged
Whether the aperture of liquid proportional throttle valve is maximum rating, obtains the second judging result；
The aperture of the electro-hydraulic proportional throttle valve and the discharge capacity of the hydraulic pump are controlled according to second judging result, are made current
Braking torque meets target requirement braking torque.
6. braking method according to claim 5, which is characterized in that described according to second judging result control
The discharge capacity of the aperture of electro-hydraulic proportional throttle valve and the hydraulic pump makes current brake torque meet target requirement braking torque, tool
Body includes:
If the aperture that second judging result is the electro-hydraulic proportional throttle valve is maximum rating, according to the target outlet end
Pressure reduces the discharge capacity of the hydraulic pump, and current brake torque is made to meet target requirement braking torque；
If the aperture that second judging result is the electro-hydraulic proportional throttle valve is not maximum rating, the hydraulic pump is maintained
Aperture is maximum, increases the aperture of the electro-hydraulic proportional throttle valve, current brake torque is made to meet target requirement braking torque.
7. a kind of braking system for hydraulic regenerative braking device, which is characterized in that the braking system includes:
Angular displacement signal obtains module, for obtaining the angular displacement signal of the brake pedal；
Target outlet end pressure determining module, for determining the target outlet side pressure of the hydraulic pump according to the angular displacement signal
Power；
Practical outlet pressures obtain module, for obtaining the hydraulic pump outlet end of the second pressure sensor acquisition
Practical outlet pressures；
Control module, for controlling the electric-hydraulic proportion section according to the target outlet end pressure and the practical outlet pressures
The aperture of valve and the discharge capacity of the hydraulic pump are flowed, current brake torque is made to meet target requirement braking torque.
8. braking system according to claim 7, which is characterized in that the target outlet end pressure determining module is specifically wrapped
It includes:
Severity of braking determination unit, for determining severity of braking signal according to the angular displacement signal；
Target requirement braking torque determination unit, for determining that the target requirement of hydraulic pump is braked according to the severity of braking signal
Torque；
Pressure difference determination unit, for determining the target requirement pressure at the hydraulic pump both ends according to the target requirement braking torque
Power is poor；
Low pressure accumulator pressure acquiring unit, the pressure of the low pressure accumulator for obtaining the first pressure sensor acquisition
Power；
Target outlet end pressure determination unit, it is true for the pressure according to the target requirement pressure difference and the low pressure accumulator
The target outlet end pressure of the fixed hydraulic pump.
9. braking system according to claim 8, which is characterized in that the control module specifically includes:
First judging unit obtains for judging whether the practical outlet pressures are less than the target outlet end pressure
One judging result；
First adjusts unit, for being that the practical outlet pressures are less than the target outlet end when first judging result
When pressure, maintains the aperture of the hydraulic pump maximum, the electro-hydraulic proportional throttle valve is turned down according to the target outlet end pressure
Aperture, so that current brake torque is met target requirement braking torque；
Second judgment unit, for being that the practical outlet pressures are not less than the target outlet when first judging result
When end pressure, judge whether the aperture of the electro-hydraulic proportional throttle valve is maximum rating, obtains the second judging result；
Control submodule, for controlling the aperture of the electro-hydraulic proportional throttle valve and described hydraulic according to second judging result
The discharge capacity of pump makes current brake torque meet target requirement braking torque.
10. braking system according to claim 9, which is characterized in that the control submodule specifically includes:
Second adjusts unit, for being maximum rating when the aperture that second judging result is the electro-hydraulic proportional throttle valve
When, reduce the discharge capacity of the hydraulic pump according to the target outlet end pressure, current brake torque is made to meet target requirement braking
Torque；
Third adjusts unit, for not being maximum rating when the aperture that second judging result is the electro-hydraulic proportional throttle valve
When, it maintains the aperture of the hydraulic pump maximum, increases the aperture of the electro-hydraulic proportional throttle valve, current brake torque is made to meet mesh
Mark demand braking torque.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810801600.6A CN109080613B (en) | 2018-07-20 | 2018-07-20 | Hydraulic regenerative braking device, braking method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810801600.6A CN109080613B (en) | 2018-07-20 | 2018-07-20 | Hydraulic regenerative braking device, braking method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109080613A true CN109080613A (en) | 2018-12-25 |
| CN109080613B CN109080613B (en) | 2020-04-28 |
Family
ID=64838235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810801600.6A Active CN109080613B (en) | 2018-07-20 | 2018-07-20 | Hydraulic regenerative braking device, braking method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109080613B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111137264A (en) * | 2020-01-02 | 2020-05-12 | 佛山市一为制动技术有限公司 | Vehicle brake boosting system, control method and device and computer equipment |
| CN115107723A (en) * | 2022-06-27 | 2022-09-27 | 山东汽车制造有限公司 | Control method and device of brake system, electronic equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1647966A (en) * | 2005-01-31 | 2005-08-03 | 上海汽车工业(集团)总公司汽车工程研究院 | Parallel connection mixed power driving system and its driving method |
| CN101337499A (en) * | 2008-08-08 | 2009-01-07 | 哈尔滨工业大学 | Vehicle braking kinetic-energy regeneration device |
| CN108248599A (en) * | 2018-02-01 | 2018-07-06 | 燕山大学 | Hydraulic hybrid regeneration brake system and control method based on double accumulators |
-
2018
- 2018-07-20 CN CN201810801600.6A patent/CN109080613B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1647966A (en) * | 2005-01-31 | 2005-08-03 | 上海汽车工业(集团)总公司汽车工程研究院 | Parallel connection mixed power driving system and its driving method |
| CN101337499A (en) * | 2008-08-08 | 2009-01-07 | 哈尔滨工业大学 | Vehicle braking kinetic-energy regeneration device |
| CN108248599A (en) * | 2018-02-01 | 2018-07-06 | 燕山大学 | Hydraulic hybrid regeneration brake system and control method based on double accumulators |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111137264A (en) * | 2020-01-02 | 2020-05-12 | 佛山市一为制动技术有限公司 | Vehicle brake boosting system, control method and device and computer equipment |
| CN111137264B (en) * | 2020-01-02 | 2020-10-09 | 佛山市一为制动技术有限公司 | Vehicle brake boosting system, control method and device and computer equipment |
| CN115107723A (en) * | 2022-06-27 | 2022-09-27 | 山东汽车制造有限公司 | Control method and device of brake system, electronic equipment and storage medium |
| CN115107723B (en) * | 2022-06-27 | 2024-05-31 | 潍柴新能源商用车有限公司 | Control method and device of braking system, electronic equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109080613B (en) | 2020-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108248599B (en) | Hydraulic hybrid regeneration brake system and control method based on double accumulators | |
| CN103407449B (en) | A kind of hydraulic pressure assistive drive and brake system and control method thereof | |
| US10155511B2 (en) | Opportunistic charging of hybrid vehicle battery | |
| CN1982135B (en) | Engine stop control apparatus for hybrid vehicle | |
| CN101544217B (en) | Hydraulic control system for multi-mode hybrid transmission and method of regulating the same | |
| CN107429827B (en) | Vehicle hydraulic control device and hydraulic control method | |
| CN103223849B (en) | A kind of parallel-connection type hybrid power driver for vehicle | |
| JP6519883B2 (en) | Controller for in-line hydraulic hybrid transmission | |
| CN103386980B (en) | Vehicle | |
| CN104787035A (en) | Vehicle | |
| TWI444550B (en) | Method and system for controlling hydraulic apparatus for continuously variable transmission of hybrid vehicle system | |
| EP2474457B1 (en) | Speed ratio control method for cvt of electric vehicle | |
| JP2008032226A (en) | Hybrid vehicle operating method | |
| CN107531231A (en) | The control device of motor vehicle driven by mixed power | |
| CN105459804A (en) | Hub motor hydraulic hybrid power system | |
| CN109080613A (en) | A kind of hydraulic regenerative braking device, braking method and system | |
| CN106891711A (en) | Load series-parallel machine hydraulic hybrid control system and control method | |
| CN108128212A (en) | A kind of hydraulic pressure auxiliary drive/braking system used for electric vehicle and its control method | |
| JP2009530168A (en) | Driving method of hybrid drive unit | |
| CN107906060A (en) | Vehicle parallel type hydraulic hybrid power system and its method with energy regenerating release function | |
| CN208348425U (en) | One kind identifying the more hydraulic transmission gear boxes of rail engineering automobile based on speed | |
| CN113006190B (en) | Control device of closed type traveling system of wheel type excavator | |
| CN203439027U (en) | Hydraulic auxiliary drive and brake system | |
| CN107763202A (en) | A kind of electric-liquid type buncher speed compares optimal control system | |
| CN206568867U (en) | Load series-parallel machine hydraulic hybrid control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |