CN105667473B - Hydrostatic drive wheeled vehicle automatic parking system and control method - Google Patents
Hydrostatic drive wheeled vehicle automatic parking system and control method Download PDFInfo
- Publication number
- CN105667473B CN105667473B CN201610119795.7A CN201610119795A CN105667473B CN 105667473 B CN105667473 B CN 105667473B CN 201610119795 A CN201610119795 A CN 201610119795A CN 105667473 B CN105667473 B CN 105667473B
- Authority
- CN
- China
- Prior art keywords
- hydraulic
- control
- valve
- oil circuit
- variable displacement
- 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.)
- Expired - Fee Related
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
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
A kind of Hydrostatic drive wheeled vehicle automatic parking system and control method.It is that parking braking control unit, driving circuit for electromagnetic valve, hydraulic lock are increased on original Hydrostatic transmission.Hydraulic lock is made of 2/2-way solenoid directional control valve, the first hydraulic control one-way valve and the second hydraulic control one-way valve.Engine, variable pump, hydraulic lock, variable displacement motor and drive axle are sequentially connected.Parking braking control unit, driving circuit for electromagnetic valve pass sequentially through electric signal with 2/2-way solenoid directional control valve and connect.The present invention carries out parking braking using hydraulic lock, is sealed by the poppet valve core of hydraulic control one-way valve, and oil pressure is higher, and poppet valve core is pressed tighter, and system can keep sealed pressure for a long time, realizes parking braking Automatic Control, and reliability is high.
Description
Technical field
The present invention relates to the parking braking technical field of wheeled vehicle, more particularly to a kind of Hydrostatic drive wheeled vehicle is automatic
Parking system and control method.
Background technology
Current Hydrostatic drive wheeled vehicle is all made of manual parking brake（It is commonly called as parking brake）Parking braking is carried out, when operation
It needs to rely on manpower.Existing parking braking technology increases the workload of driver, easily leads to driving fatigue；In vehicle stall
Afterwards, many drivers forget pull-up parking brake, easily lead to the accidents such as car slipping；Vehicle when driving, many drivers forget
Parking braking is released, the unnecessary power loss of vehicle and component abrasion can be caused.It can be seen that in the art, hydrostatic
The parking braking technology of transmission wheel type vehicle need to be improved.
Invention content
The object of the present invention is to provide a kind of Hydrostatic drive wheeled vehicle automatic parking system and control methods.
The present invention is by the original engine of all Hydrostatic drive wheeled vehicles, hydraulic oil container, oil filter, variable pump, upper end
Oil circuit, lower end oil circuit, variable displacement motor, drive axle, gearbox controller and CAN bus, and parking system that the present invention is included
Dynamic control unit, driving circuit for electromagnetic valve, hydraulic lock composition.The hydraulic lock includes 2/2-way solenoid directional control valve, the first liquid
Control check valve and the second hydraulic control one-way valve.The engine, variable pump, hydraulic lock, variable displacement motor and drive axle are sequentially connected.Institute
It states upper end oil circuit to connect with the oil outlet of variable pump, lower end oil circuit is connected with the oil inlet of variable pump, 2/2-way electromagnetic switch
Valve is located on upper end oil circuit and lower end oil circuit.The oil inlet and upper end oil circuit connection of first hydraulic control one-way valve, oil outlet and
Variable displacement motor connects, control port and lower end oil circuit connection；The oil inlet and lower end oil circuit connection of second hydraulic control one-way valve, it is fuel-displaced
Mouth is connected with variable displacement motor, control port and upper end oil circuit connection.The hydraulic oil container passes through oil filter and lower end oil circuit connection.
The CAN bus, parking braking control unit, driving circuit for electromagnetic valve and 2/2-way solenoid directional control valve pass sequentially through electric signal
Connection.The gearbox controller is connected with CAN bus by electric signal.
When 2/2-way solenoid directional control valve is in power-down state, upper end oil circuit and lower end oil circuit are not turned on, and at this time first
Hydraulic control one-way valve and the second hydraulic control one-way valve one-way conduction, hydraulic lock are opened, and hydraulic oil can not be flowed by variable displacement motor.When driving
The person's of sailing not stepping on accelerator pedal, and when Hydrostatic drive wheeled vehicle speed is zero, variable displacement motor is in the state of maximum pump discharge.If
Mobile trend occurs under the influence of the external world for vehicle, and variable displacement motor will produce the trend of rotation, and then generate pump oil phenomenon.At this time
Due to the unlatching of hydraulic lock so that variable displacement motor is in locking state, and vehicle realizes that parking braking is opened.
By upper end, oil circuit is for high-pressure oil passage, lower end oil circuit are low pressure oil ways.When 2/2-way solenoid directional control valve is in
When power-up state, upper end oil circuit and the conducting of lower end oil circuit, the first hydraulic control one-way valve one-way conduction, the second hydraulic control one-way valve are double at this time
To conducting, hydraulic lock is closed, and hydraulic oil can be flowed by variable displacement motor.Variable displacement motor can be with oil inlet and oil outlet at this time
Pressure difference rotates, and realizes that parking braking releases.When upper end, oil circuit is low pressure oil way, lower end oil circuit when being high-pressure oil passage, parking braking
Releasing process is similar with above procedure, and details are not described herein.
Compared with prior art the beneficial effects of the invention are as follows：
1. the present invention realizes parking braking Automatic Control, the workload of driver can be reduced, avoids generation from driving tired
Labor；
2. The present invention reduces the probability of making a mistake of driver, can avoid bringing because driver forgets pull-up parking brake
Security risk, while also can avoid because driver forget release parking caused by unnecessary power loss and component abrasion；
3. the present invention only need to increase a set of parking braking control system, a 2/2-way on original Hydrostatic transmission
Solenoid directional control valve and two hydraulic control one-way valves, it is simple in structure, it is light-weight, it occupies little space, cost is relatively low.
4. present invention employs hydraulic locks to carry out parking braking, it is sealed by the poppet valve core of hydraulic control one-way valve, oil pressure
Higher, poppet valve core is pressed tighter, and system can keep sealed pressure, reliability higher for a long time.
Description of the drawings
The present invention will be further described below with reference to the drawings：
Fig. 1 is the structure composition and operation principle schematic diagram of the present invention.
Fig. 2 is the control flow chart that parking braking of the present invention releases.
Fig. 3 is the control flow chart that parking braking of the present invention is opened.
In figure：1. gearbox controller, 2. variable pumps, 3. upper end oil circuits, 4.CAN buses, 5. driving circuit for electromagnetic valve, 6.
Parking braking control unit, 7. drive axles, 8. variable displacement motors, 9. hydraulic locks, 91. first hydraulic control one-way valves, 92. second hydraulic control lists
To valve, 93. 2/2-way solenoid directional control valves, 10. lower end oil circuits, 11. hydraulic oil containers, 12. oil filters, 13. engines.
Specific implementation mode
The present invention is explained in detail below in conjunction with the accompanying drawings：
Refering to Figure 1, a kind of Hydrostatic drive wheeled vehicle automatic parking system, including all Hydrostatic drive wheeled vehicles
Original engine 13, hydraulic oil container 11, oil filter 12, variable pump 2, upper end oil circuit 3, lower end oil circuit 10, variable displacement motor 8,
Drive axle 7, gearbox controller 1 and CAN bus 4, and the present invention included parking braking control unit 6, solenoid valve drive
Dynamic circuit 5, hydraulic lock 9.The hydraulic lock 9 includes 2/2-way solenoid directional control valve 93, the first hydraulic control one-way valve 91 and the second liquid
Control check valve 92.The engine 13, variable pump 2, hydraulic lock 9, variable displacement motor 8 and drive axle 7 are sequentially connected.The upper end oil
Road 3 is connected with the oil outlet of variable pump 2, and lower end oil circuit 10 is connected with the oil inlet of variable pump 2,2/2-way solenoid directional control valve 93
On upper end oil circuit 3 and lower end oil circuit 10.The oil inlet and upper end oil circuit 3 of first hydraulic control one-way valve 91 connect, fuel-displaced
Mouth and variable displacement motor 8 connect, and control port and lower end oil circuit 10 connect；The oil inlet and lower end oil circuit of second hydraulic control one-way valve 92
10 connections, oil outlet and variable displacement motor 8 connect, and control port and upper end oil circuit 3 connect.The hydraulic oil container 11 passes through oil filter
12 connect with lower end oil circuit 10.The CAN bus 4, parking braking control unit 6, driving circuit for electromagnetic valve 5 and 2/2-way electricity
Magnetic reversal valve 93 passes sequentially through electric signal connection.The gearbox controller 1 is connected with CAN bus 4 by electric signal.
When 2/2-way solenoid directional control valve 93 is in power-down state, upper end oil circuit 3 and lower end oil circuit 10 are not turned on, at this time
92 one-way conduction of first hydraulic control one-way valve 91 and the second hydraulic control one-way valve, hydraulic lock 9 are opened, and hydraulic oil can not pass through variable displacement motor
8 flowings.When driver's not stepping on accelerator pedal, and when Hydrostatic drive wheeled vehicle speed is zero, variable displacement motor 8 is in maximum pump discharge
State.If mobile trend occurs under the influence of the external world for vehicle, variable displacement motor 8 will produce the trend of rotation, and then generate
Pump oil phenomenon.At this time due to the unlatching of hydraulic lock 9 so that variable displacement motor 8 is in locking state, and vehicle realizes that parking braking is opened
It opens.
By upper end oil circuit 3 be for high-pressure oil passage, lower end oil circuit 10 are low pressure oil ways.When 2/2-way solenoid directional control valve 93
When in power-up state, upper end oil circuit 3 and lower end oil circuit 10 are connected, at this time 91 one-way conduction of the first hydraulic control one-way valve, the second liquid
92 bidirectional conduction of check valve is controlled, hydraulic lock 9 is closed, and hydraulic oil can be flowed by variable displacement motor 8.Variable displacement motor 8 can be at this time
The pressure difference of oil inlet and oil outlet rotates, and realizes that parking braking releases.It is when upper end oil circuit 3 is low pressure oil way, lower end oil circuit 10
When high-pressure oil passage, parking braking releasing process is similar with above procedure, and details are not described herein.
1, the control method that parking braking releases
The control method and flow such as Fig. 2 that parking braking of the present invention releases.When vehicle parking, hydraulic lock 9 is in opening state
State, variable displacement motor 8 are in locking state.When parking braking control unit 6 is collected from CAN bus 4 from transmission control
When the gear signal of device 1 is D grades or R grades, 2/2-way solenoid directional control valve 93 powers on.Hydraulic lock 9 is closed at this time, variable displacement motor 8
It can be rotated with the pressure difference of oil inlet and oil outlet, parking braking releases.
2, the control method that parking braking is opened
The control method and flow such as Fig. 3 that parking braking of the present invention is opened.When driving, hydraulic lock 9 is in closes shape to vehicle
State, variable displacement motor 8 can be rotated with the pressure difference of oil inlet and oil outlet.When parking braking control unit 6 is acquired from CAN bus 4
It it is N grade to the gear signal from gearbox controller 1, and when speed signal is 0,2/2-way solenoid directional control valve 93 times is electric.
Hydraulic lock 9 is opened at this time, and variable displacement motor 8 is in locking state, and parking braking is opened.
It should be pointed out that the more electric change valves of multidigit, which can be used, in the present invention realizes automatically controlling for parking system, together
When present invention may also apply to P3 configurations（I.e. variable displacement motor is parallel on the subsequent transmission shaft of speed changer）Parallel hydraulic mixing
Power wheeled vehicle.It will be appreciated by those skilled in the art that above example is not to the unique of technical solution of the present invention
It limits, every any equivalents done under technical solution of the present invention Spirit Essence or change are regarded as belonging to this hair
Bright protection domain.
Claims (1)
1. a kind of control method of Hydrostatic drive wheeled vehicle automatic parking system, the Hydrostatic drive wheeled vehicle automatic parking
System includes sequentially connected engine (13), variable pump (2), variable displacement motor (8) and drive axle (7), variable pump (2) it is fuel-displaced
Mouth is connect with upper end oil circuit (3), and the oil inlet of variable pump (2) is connect with lower end oil circuit (10), and lower end oil circuit (10) passes through oil strain
Device (12) is connected to hydraulic oil container (11), and hydraulic lock (9), the hydraulic lock are equipped between variable pump (2) and variable displacement motor (8)
(9) include 2/2-way solenoid directional control valve (93), the first hydraulic control one-way valve (91) and the second hydraulic control one-way valve (92)；Wherein first
The oil inlet and upper end oil circuit (3) of hydraulic control one-way valve (91) connect, the oil outlet and variable displacement motor of the first hydraulic control one-way valve (91)
(8) it connects, the control port of the first hydraulic control one-way valve (91) and lower end oil circuit (10) connection；Second hydraulic control one-way valve (92) into
Hydraulic fluid port and lower end oil circuit (10) connection, oil outlet and variable displacement motor (8) connection of the second hydraulic control one-way valve (92), the second hydraulic control list
Control port to valve (92) and upper end oil circuit (3) connection；2/2-way solenoid directional control valve (93) be located at upper end oil circuit (3) and under
Hold on oil circuit (10), 2/2-way solenoid directional control valve (93) by electric signal successively with driving circuit for electromagnetic valve (5), parking braking
Control unit (6) and CAN bus (4) connection, CAN bus (4) are connect with gearbox controller (1)；It is characterized in that, described
Control method includes：
1）When vehicle parking, hydraulic lock (9) is in open state, and variable displacement motor (8) is in locking state, when parking braking controls
Unit (6) collected from CAN bus (4) shift signal from gearbox controller (1) be D gear or R keep off when, 2/2-way
Solenoid directional control valve (93) powers on, and upper end oil circuit (3) and lower end oil circuit (10) conducting, the first hydraulic control one-way valve (91) are unidirectionally led at this time
Logical, the second hydraulic control one-way valve (92) bidirectional conduction, hydraulic lock (9) is closed, and hydraulic oil can be flowed by variable displacement motor (8), is become
Amount motor (8) can be rotated with the pressure difference of oil inlet and oil outlet, realize that parking braking releases；
2）When driving, hydraulic lock (9) is closed vehicle, and variable displacement motor (8) can be with the pressure difference of oil inlet and oil outlet
Rotation is kept off when parking control unit (6) collects the shift signal from gearbox controller (1) from CAN bus (4) for N,
And speed signal, when being 0, electricity under 2/2-way solenoid directional control valve (93), upper end oil circuit (3) and lower end oil circuit (10) are not led at this time
Logical, the first hydraulic control one-way valve (91) and the second hydraulic control one-way valve (92) one-way conduction, hydraulic lock (9) are opened, and hydraulic oil can not lead to
Variable displacement motor (8) flowing is crossed, variable displacement motor (8) is in locking state, realizes that parking braking is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610119795.7A CN105667473B (en) | 2016-03-03 | 2016-03-03 | Hydrostatic drive wheeled vehicle automatic parking system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610119795.7A CN105667473B (en) | 2016-03-03 | 2016-03-03 | Hydrostatic drive wheeled vehicle automatic parking system and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105667473A CN105667473A (en) | 2016-06-15 |
| CN105667473B true CN105667473B (en) | 2018-07-24 |
Family
ID=56306462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610119795.7A Expired - Fee Related CN105667473B (en) | 2016-03-03 | 2016-03-03 | Hydrostatic drive wheeled vehicle automatic parking system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105667473B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109849949B (en) * | 2019-03-29 | 2020-04-03 | 潍柴动力股份有限公司 | Vehicle running hydraulic control system, vehicle and running control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4543786A (en) * | 1983-07-14 | 1985-10-01 | Caterpillar Tractor Co. | Control system for hydrostatic transmission |
| DE4342309A1 (en) * | 1993-12-11 | 1995-06-14 | Linde Ag | Open circuit hydrostatic drive system for vehicle |
| CN1695017A (en) * | 2003-01-29 | 2005-11-09 | 布鲁宁赫斯海诺马帝克有限公司 | Control of a hydrostatic gearbox |
| CN103774900A (en) * | 2014-01-20 | 2014-05-07 | 汪功明 | Hydraulic auxiliary device for parking |
-
2016
- 2016-03-03 CN CN201610119795.7A patent/CN105667473B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4543786A (en) * | 1983-07-14 | 1985-10-01 | Caterpillar Tractor Co. | Control system for hydrostatic transmission |
| DE4342309A1 (en) * | 1993-12-11 | 1995-06-14 | Linde Ag | Open circuit hydrostatic drive system for vehicle |
| CN1695017A (en) * | 2003-01-29 | 2005-11-09 | 布鲁宁赫斯海诺马帝克有限公司 | Control of a hydrostatic gearbox |
| CN103774900A (en) * | 2014-01-20 | 2014-05-07 | 汪功明 | Hydraulic auxiliary device for parking |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105667473A (en) | 2016-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103407449B (en) | A kind of hydraulic pressure assistive drive and brake system and control method thereof | |
| CN104129428B (en) | Emergency steering control system and method | |
| CN108128212A (en) | A kind of hydraulic pressure auxiliary drive/braking system used for electric vehicle and its control method | |
| CN101913348A (en) | Wheel rim driving wheel brake device | |
| CN205075831U (en) | Novel vapour -pressure type braking commercial vehicle parking braking device | |
| CN105459804A (en) | Hub motor hydraulic hybrid power system | |
| CN109695693A (en) | A kind of wheel hub liquid drive system and its control method that differential between taking turns may be implemented | |
| CN102616125B (en) | A kind of system and method that hydraulic energy-accumulation hybrid power is provided | |
| CN106715976A (en) | Control systems for hydraulically actuated transmissions of electric vehicles | |
| CN105667473B (en) | Hydrostatic drive wheeled vehicle automatic parking system and control method | |
| CN105109475B (en) | A kind of automobile electric control parking device | |
| CN205498924U (en) | Hydraulic pressure little progress braking system | |
| CN108146245B (en) | Control system for preventing engine from overspeed | |
| CN104494586B (en) | Automatic parking control system and control method of automatic cars | |
| CN207550293U (en) | Unmanned tractor fluid-link steering and braking system | |
| CN202753927U (en) | ABS (anti-lock braking system)-based intelligent EPB (electronic parking brake) system | |
| CN109080443A (en) | Hybrid power system and control method | |
| CN203439027U (en) | Hydraulic auxiliary drive and brake system | |
| CN101370702B (en) | Control system for frame-steering of a vehicle and method for controlling two steering cylinders in a frame-steered vehicle | |
| CN204587015U (en) | A kind of crawler type field machine fluid-link steering and brake integrated system | |
| CN109649163A (en) | Vehicle to run system and its control method, environmental sanitation vehicles | |
| CN110497893A (en) | A kind of unmanned car automatic breaking system | |
| CN2747114Y (en) | Means for recovering braking energy of automobile | |
| CN210565432U (en) | Electrohydraulic valve group of unmanned agricultural machine | |
| CN204978619U (en) | Car electricity, compound drive -by -wire braking system of liquid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180724 Termination date: 20190303 |