CN107323446A - Braking control system and its control method applied to hydraulic closed drive system - Google Patents
Braking control system and its control method applied to hydraulic closed drive system Download PDFInfo
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- CN107323446A CN107323446A CN201710532361.4A CN201710532361A CN107323446A CN 107323446 A CN107323446 A CN 107323446A CN 201710532361 A CN201710532361 A CN 201710532361A CN 107323446 A CN107323446 A CN 107323446A
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- 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
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses the braking control system and its control method planted applied to hydraulic closed drive system, the braking control system includes hydraulic pump, Braking mode valve group and hydraulic motor；The Braking mode valve group is control valve block, and the valve block includes the first oil return logical valve, the second oil return logical valve, the first oil-feed logical valve, the second oil-feed logical valve, the first stop valve, the second stop valve, the first safety valve and the second safety valve, the first automatic brake valve and the second automatic brake valve.The present invention automatically adjusts drive system pressure by brake fluid system, compared with tradition machinery is braked, it is not necessary to which driver's frequent starting and closing is braked, it is to avoid driver high-intensity operation, while improving operating efficiency.Brakes uses closed-loop control, it is ensured that descending road conditions Steady speed, prevents the frequent start-stop using mechanical braking, and then reduce the impact and the damage of mechanical structure to fluid power system, it is ensured that the safety and reliability of the course of work.
Description
Technical field
The invention belongs to braking control system field, it is related to a kind of control for brake system applied to hydraulic closed drive system
System and its control method.
Background technology
Engineering truck drive system uses Closed Hydraulic Driving system, and the import and export two ends of its hydraulic circuit all may be used
With power output.In vehicle downhill running, there is over-running load torque, loading moment is changed into power, and vehicle may because of deadweight
Hypervelocity motion is produced, serious potential safety hazard is caused.Therefore, it is necessary to add effective braking system in fluid power system
System.
At present, the engineering truck brakes overwhelming majority uses conventional brake, and main method is the gas by mechanical friction
Compacting is moved and hydraulic braking.Under Exceed load operating mode, the frequent use of mechanical brake can accelerate braking member to wear and tear and draw
Play braking ability to decline, frequently start-stop causes energy dissipation, and makes driver easily form driving fatigue.Therefore, engineering truck
In the urgent need to a kind of main brakes applied to descending road conditions, it is ensured that speed stability and job security.
The content of the invention
The present invention solves the technical problem of shortcoming of the prior art is overcome, there is provided a kind of safe and reliable liquid
Press off the braking control system of formula drive system.Exceed load can occur in hydraulic motor in the present invention, and oil inlet occurs abnormal
During pressure, the pressure signal detected based on monitoring pressure sensor is adjusted automatic brake valve by control system, balances negative sense
Load force, reaches that enclosed drive system descending road conditions speed is steady, the purpose of safe operation.
In order to solve above-mentioned technical problem, the present invention is achieved by the following technical solutions：
A kind of braking control system applied to hydraulic closed drive system, the braking control system include hydraulic pump 1,
Braking mode valve group 15 and hydraulic motor 8；The Braking mode valve group 15 is control valve block, and the valve block includes the first oil return logic
Valve 2, the second oil return logical valve 14, the first oil-feed logical valve 3, the second oil-feed logical valve 13, the first stop valve 4, the second stop valve
12nd, the first safety valve 5 and the second safety valve 11, the first automatic brake valve 6 and the second automatic brake valve 10；
The oil inlet and the first oil return logical valve 2 of first hydraulic fluid port of the hydraulic pump 1 and the first oil-feed logical valve 3
Oil return opening is connected；Second hydraulic fluid port of the hydraulic pump 1 is patrolled with the oil inlet of the second oil-feed logical valve 13 and the first oil return
The oil return opening for collecting valve 14 is connected；The hydraulic pump 1 provides oil pressure for the braking control system；
First hydraulic fluid port of the hydraulic motor 8 and the oil return opening of the first oil-feed logical valve 3 and entering for the first stop valve 4
Hydraulic fluid port is connected；The oil return opening and the second stop valve of second hydraulic fluid port of the hydraulic motor 8 and the second oil-feed logical valve 13
12 oil inlet is connected；
The oil inlet of first automatic brake valve 6 is connected with the oil inlet of first stop valve 4；Described first certainly
The oil return opening of dynamic brake valve 6 and the oil return opening of second automatic brake valve 10, the oil inlet of the first oil return logical valve 2, second
The oil return opening of the oil inlet of oil return logical valve 14, the oil return opening of the first safety valve 5 and the second safety valve 11 is connected；
The oil inlet of second automatic brake valve 10 is connected with the oil inlet of second stop valve 12；Described second
The oil return opening of the oil return opening of automatic brake valve 10 and first automatic brake valve 6, the oil inlet of the first oil return logical valve 2, the
The oil return opening of the oil inlet of two oil return logical valves 14, the oil return opening of the first safety valve 5 and the second safety valve 11 is connected；
The oil return opening and the first automatic brake valve 6 of the oil inlet of first stop valve 4 and the first oil-feed logical valve 3
Oil inlet be connected；The oil return opening of the oil return opening of first stop valve 4 and second automatic brake valve 10, the first oil return
The oil inlet of logical valve 2, the oil inlet of the second oil return logical valve 14, the oil return opening of the first safety valve 5 and the second safety valve 11
Oil return opening is connected；
The oil return opening and the second Braking mode of the oil inlet of second stop valve 12 and the second oil-feed logical valve 13
The oil inlet of valve 10 is connected；The oil return opening of the oil return opening of second stop valve 12 and first automatic brake valve 6, first
The oil inlet of oil return logical valve 2, the oil inlet of the second oil return logical valve 14, the oil return opening and the second safety valve of the first safety valve 5
11 oil return opening is connected；
The of the oil return opening of the oil inlet of the first oil-feed logical valve 3 and the first oil return logical valve 2 and hydraulic pump 1
One hydraulic fluid port is connected；The oil return opening of the first oil-feed logical valve 3 and the oil inlet and hydraulic motor 8 of first stop valve 4
The first hydraulic fluid port be connected；
The oil return opening and hydraulic pump 1 of the oil inlet of the second oil-feed logical valve 13 and the second oil return logical valve 14
Second hydraulic fluid port is connected；The oil return opening of the second oil-feed logical valve 13 and the oil inlet of second stop valve 12 and hydraulic pressure horse
The second hydraulic fluid port up to 8 is connected；
Oil inlet, the first safety valve 5 of the oil inlet of the first oil return logical valve 2 and the second oil return logical valve 14
Oil return opening and the oil return opening of the first automatic brake valve 6 be connected；The oil return opening and described first of the first oil return logical valve 2
The oil inlet of oil-feed logical valve 3 is connected；
Oil inlet, the second safety valve of the oil inlet of the second oil return logical valve 14 and the first oil return logical valve 2
The oil return opening of 11 oil return opening and the second automatic brake valve 10 is connected；The oil return opening of the second oil return logical valve 14 with it is described
The oil inlet of second oil-feed logical valve 13 is connected；
The oil inlet of the oil inlet of first safety valve 5 and first automatic brake valve 6, the first stop valve 4 enter
The oil return opening of hydraulic fluid port and the first oil-feed logical valve 3 is connected；The oil return opening of first safety valve 5 and first stop valve 4
Oil return opening and the oil return opening of the first automatic brake valve 6 be connected；
The oil inlet of the oil inlet of second safety valve 11 and second automatic brake valve 10, the second stop valve 12
The oil return opening of oil inlet and the second oil-feed logical valve 13 is connected；The oil return opening of first safety valve 5 and the described second cut-off
The oil return opening of the oil return opening of valve 12 and the second automatic brake valve 10 is connected.
Further, the braking control system also includes electronic control unit (ECU), first pressure sensor 7 and the
Two pressure sensors 9；The first pressure sensor 7 is connected on the pipeline of the hydraulic fluid port of hydraulic motor 8 first, for detecting
First hydraulic fluid port pressure value of hydraulic motor 8, it exports electric signal and is connected with electronic control unit input；The second pressure is passed
Sensor 9 is connected on the pipeline of the hydraulic fluid port of hydraulic motor 8 second, and for detecting hydraulic motor the second hydraulic fluid port pressure value, its is defeated
Go out electric signal to be connected with electronic control unit input；The electronic control unit (ECU) is that vehicle often uses controller, and it is inputted
End collection first pressure sensor 7 and the signal of second pressure sensor 9, by internal processes carry out closed-loop control computing and
PID adjusts computing, and operation result is converted into electric signal, the first Braking mode 6 of control and the second automatic brake valve 10.
The control method of the braking control system of the hydraulic closed drive system, its content comprises the following steps：
Obtain the hydraulic fluid port of hydraulic motor 8 first and respectively by first pressure sensor 7 and second pressure sensor 9 first
The pressure value of two hydraulic fluid ports；
When the first hydraulic fluid port of hydraulic pump 1 is oil discharge outlet, now the first hydraulic fluid port of hydraulic motor 8 is oil inlet, and it second
Hydraulic fluid port is oil return opening, and now electronic control unit, which sends electric signal, makes the first automatic brake valve 6 be in maximum Opening pressure state,
Second automatic brake valve 10 is in minimum Opening pressure state, and the valve port of the first stop valve 4 is closed, and the valve port of the second stop valve 12 is complete
Open, hydraulic oil is pumped out from the hydraulic fluid port of hydraulic pump 1 first, by the first oil-feed logical valve 3, into the first hydraulic fluid port of hydraulic motor 8,
Hydraulic oil is discharged from the second hydraulic fluid port of hydraulic motor 8, into the second stop valve 12, now because the second automatic brake valve 10 is opened
Pressure is zero, and the valve port standard-sized sheet of the second stop valve 12, hydraulic oil passes through the second stop valve 12, the hydraulic return of the second oil return stop valve 14
Second hydraulic fluid port of pump 1；
When the first hydraulic fluid port pressure value of hydraulic motor 8 is less than pressure preset, now electronic control unit judges occur
Exceed load phenomenon, gives the second automatic brake valve 10 setting electric signal, and the Opening pressure of the second stop valve 12, which becomes, turns to setting value,
Brake back pressure to set up, balance negative sense load force, it is to avoid the hypervelocity phenomenon under Exceed load, electronic control unit is according to the pressure of reception
Force value signal, sends control instruction PID regulations automatically, and closed-loop control adjusts the Opening pressure of the second automatic brake valve 10, so that
Further improve the braking ability of system；
When the first hydraulic fluid port pressure value of hydraulic motor 8 is more than pressure preset, now electronic control unit judges not go out
Existing Exceed load phenomenon, gives the Opening pressure of the second automatic brake valve 10 and keeps minimum value, second fully opens by 14 valves, this
When brake system pressure be zero；
When the second hydraulic fluid port of hydraulic pump 1 is oil discharge outlet, now the second hydraulic fluid port of hydraulic motor 8 is oil inlet, and it first
Hydraulic fluid port is oil return opening, and now electronic control unit, which sends electric signal, makes the second automatic brake valve 10 be in maximum Opening pressure shape
State, the first automatic brake valve 6 is in Opening pressure minimum state, and the valve port of the second stop valve 12 is closed, and the first stop valve 4 is opened completely
Open, hydraulic oil is pumped out from the oil discharge outlet of hydraulic pump 1, by the second oil-feed logical valve 14, into the second hydraulic fluid port of hydraulic motor 8, liquid
Press oil and discharged from the first hydraulic fluid port of hydraulic motor 8, into the first stop valve 4, now due to the Opening pressure of the first automatic brake valve 6
Be zero, the valve port standard-sized sheet of the first stop valve 4, hydraulic oil by the first stop valve 4, the rework solution press pump 1 of the first oil return stop valve 2
One hydraulic fluid port；
When the second hydraulic fluid port pressure value of hydraulic motor 8 is less than pressure preset, now electronic control unit judges occur
Exceed load phenomenon, gives the first automatic brake valve 6 setting electric signal, and the Opening pressure of the first stop valve 4, which becomes, turns to setting pressure
Value, braking back pressure is set up, and balances negative sense load force, it is to avoid the hypervelocity phenomenon under Exceed load, electronic control unit is according to reception
Pressure value signal, send automatically control instruction PID regulation, closed-loop control adjust the second automatic brake valve 10 Opening pressure,
So as to further improve the braking ability of system；
When the second hydraulic fluid port pressure value of hydraulic motor 8 is more than pressure preset, now electronic control unit judges not go out
Existing Exceed load phenomenon, gives the Opening pressure of the first automatic brake valve 6 and keeps minimum value, the first stop valve 4 is fully opened, now
Brake system pressure is zero.
Due to using above-mentioned technical proposal, a kind of control for brake applied to hydraulic closed drive system that the present invention is provided
System, compared with prior art with such beneficial effect：
The present invention uses the real-time monitoring motor inlet pressure signal of pressure sensor, when there is Exceed load phenomenon, horse
When there is abnormal pressure signal up to oil inlet, control system output control signal immediately, by controlling brake valve to set up hydraulic pressure system
System back pressure, balance the load power, and passes through feedback device correction automatic brake valve output pressure.From the point of view of brake structure, the present invention
Brakes mainly include Braking mode valve group, electric-control system, arrangement is convenient, compared with gas braking, hydraulic braking, it is to avoid
Occurs the apparatus structure of complexity on hull.
The present invention automatically adjusts drive system pressure by brake fluid system, compared with tradition machinery is braked, it is not necessary to
Driver's frequent starting and closing is braked, it is to avoid driver high-intensity operation, while improving operating efficiency.Brakes is used
Closed-loop control, it is ensured that descending road conditions Steady speed, prevents the frequent start-stop using mechanical braking, and then reduce to hydraulic-driven
The impact of system and the damage of mechanical structure, it is ensured that the safety and reliability of the course of work.
Brief description of the drawings
Fig. 1 is the hydraulic system principle figure of the present invention；
Fig. 2 is the theory diagram of control unit of the present invention；
Fig. 3 is the logic control flow process figure of control method of the present invention.
The mark of each part is as follows in accompanying drawing：1st, hydraulic pump；2nd, the first oil return logical valve；3rd, the first oil-feed logical valve；4、
First stop valve；5th, the first safety valve；6th, the first automatic brake valve；7th, first pressure sensor；8th, hydraulic motor；9th, the second pressure
Force snesor；10th, the second automatic brake valve；11st, the second safety valve；12nd, the second stop valve；13rd, the second oil-feed logical valve；14、
Second oil return logical valve；15th, Braking mode valve group；
Embodiment
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.Below
The present invention is described in further detail with embodiment with reference to accompanying drawing：
A kind of braking control system applied to hydraulic closed drive system of the present invention, as shown in figure 1, the braking control
System processed includes hydraulic pump 1, Braking mode valve group 15 and hydraulic motor 8；The Braking mode valve group 15 is control valve block, the valve
Block includes the first oil return logical valve 2, the second oil return logical valve 14, the first oil-feed logical valve 3, the second oil-feed logical valve 13, first
Stop valve 4, the second stop valve 12, the first safety valve 5 and the second safety valve 11, the first automatic brake valve 6 and the second Braking mode
Valve 10；
The hydraulic pump 1 is two-way closed variable pump, the oil inlet of its first hydraulic fluid port and the first oil-feed logical valve 3 and
The oil return opening of first oil return logical valve 2 is connected；The oil inlet and first of its second hydraulic fluid port and the second oil-feed logical valve 13
The oil return opening of oil return logical valve 14 is connected；The two-way closed variable pump of hydraulic pump 1 provides oil for the braking control system
Pressure；
The hydraulic motor 8 is bidirectional variable hydraulic motor, the oil return of its first hydraulic fluid port and the first oil-feed logical valve 3
Mouth is connected with the oil inlet of the first stop valve 4；The oil return opening and second of its second hydraulic fluid port and the second oil-feed logical valve 13
The oil inlet of stop valve 12 is connected；
First automatic brake valve 6 be electromagnetic proportion relief valve, the Opening pressure of adoption rate magnet control valve, its
Oil inlet is connected with the oil inlet of first stop valve 4；The oil return opening of its oil return opening and second automatic brake valve 10,
The oil inlet of first oil return logical valve 2, the oil inlet of the second oil return logical valve 14, the oil return opening of the first safety valve 5 and the second peace
The oil return opening of full valve 11 is connected；
Second automatic brake valve 10 be electromagnetic proportion relief valve, the Opening pressure of adoption rate magnet control valve,
Its oil inlet is connected with the oil inlet of second stop valve 12；The oil return of its oil return opening and first automatic brake valve 6
Mouth, the oil inlet of the first oil return logical valve 2, the oil inlet of the second oil return logical valve 14, the oil return opening and second of the first safety valve 5
The oil return opening of safety valve 11 is connected；
First stop valve 4 is the inserting stop valve of cover plate, and its oil inlet is returned with the first oil-feed logical valve 3
The oil inlet of hydraulic fluid port and the first automatic brake valve 6 is connected；The oil return opening of its oil return opening and second automatic brake valve 10, the
The oil inlet of one oil return logical valve 2, the oil inlet of the second oil return logical valve 14, the oil return opening of the first safety valve 5 and the second safety
The oil return opening of valve 11 is connected；
Second stop valve 12 is the inserting stop valve of cover plate, its oil inlet and the second oil-feed logical valve 13
The oil inlet of oil return opening and the second automatic brake valve 10 is connected；The oil return opening of its oil return opening and first automatic brake valve 6,
The oil inlet of first oil return logical valve 2, the oil inlet of the second oil return logical valve 14, the oil return opening of the first safety valve 5 and the second peace
The oil return opening of full valve 11 is connected；
The first oil-feed logical valve 3 is the inserting stop valve of cover plate, its oil inlet and the first oil return logical valve 2
Oil return opening be connected with the first hydraulic fluid port of hydraulic pump 1；The oil inlet and hydraulic motor of its oil return opening and first stop valve 4
8 the first hydraulic fluid port is connected；
The second oil-feed logical valve 13 is the inserting stop valve of cover plate, its oil inlet and the second oil return logical valve
14 oil return opening is connected with the second hydraulic fluid port of hydraulic pump 1；The oil inlet and hydraulic pressure of its oil return opening and second stop valve 12
Second hydraulic fluid port of motor 8 is connected；
The first oil return logical valve 2 is the inserting stop valve of cover plate, its oil inlet and the second oil return logical valve
The oil return opening of 14 oil inlet, the oil return opening of the first safety valve 5 and the first automatic brake valve 6 is connected；Its oil return opening with it is described
The oil inlet of first oil-feed logical valve 3 is connected；
The second oil return logical valve 14 is the inserting stop valve of cover plate, its oil inlet and the first oil return logical valve
The oil return opening of 2 oil inlet, the oil return opening of the second safety valve 11 and the second automatic brake valve 10 is connected；Its oil return opening with it is described
The oil inlet of second oil-feed logical valve 13 is connected；
First safety valve 5 is the inserting overflow valve of cover plate, and its oil inlet enters with first automatic brake valve 6
The oil return opening of hydraulic fluid port, the oil inlet of the first stop valve 4 and the first oil-feed logical valve 3 is connected；Its oil return opening with described first section
Only the oil return opening of the oil return opening of valve 4 and the first automatic brake valve 6 is connected；
Second safety valve 11 is the inserting overflow valve of cover plate, its oil inlet and second automatic brake valve 10
The oil return opening of oil inlet, the oil inlet of the second stop valve 12 and the second oil-feed logical valve 13 is connected；Its oil return opening and described the
The oil return opening of the oil return opening of two stop valves 12 and the second automatic brake valve 10 is connected.
It is of the invention further, in addition to electronic control unit (ECU), first pressure sensor 7 and second pressure sensing
Device 9；
The electronic control unit input and first pressure sensor 7 and the signal output part of second pressure sensor 9
It is connected, the electronic control unit output unit controls the first automatic brake valve 6 and the second automatic brake valve 10；
The first pressure sensor 7 detects the first hydraulic fluid port pressure value of hydraulic motor, and it exports electric signal and electronics control
Unit input processed connection, the second pressure sensor 9 detects hydraulic motor the second hydraulic fluid port pressure value, its export electric signal with
Electronic control unit input is connected.
As shown in Figure 1-2, the braking control system also includes electronic control unit (ECU), the and of first pressure sensor 7
Second pressure sensor 9；The first pressure sensor 7 is connected on the pipeline of the hydraulic fluid port of hydraulic motor 8 first, for examining
The first hydraulic fluid port pressure value of hydraulic motor 8 is surveyed, it exports electric signal and is connected with electronic control unit input；The second pressure
Sensor 9 is connected on the pipeline of the hydraulic fluid port of hydraulic motor 8 second, for detecting hydraulic motor the second hydraulic fluid port pressure value, its
Output electric signal is connected with electronic control unit input；The electronic control unit (ECU) is that vehicle often uses controller, and its is defeated
Enter end collection first pressure sensor 7 and the signal of second pressure sensor 9, by internal processes carry out closed-loop control computing and
PID adjusts computing, and operation result is converted into electric signal, the first Braking mode 6 of control and the second automatic brake valve 10.
The control method of Braking mode function is elaborated with reference to Fig. 3：
The control method of the braking control system of the hydraulic closed drive system, its content comprises the following steps：
Obtain the hydraulic fluid port of hydraulic motor 8 first and respectively by first pressure sensor 7 and second pressure sensor 9 first
The pressure value of two hydraulic fluid ports；
When the first hydraulic fluid port of hydraulic pump 1 is oil discharge outlet, now the first hydraulic fluid port of hydraulic motor 8 is oil inlet, and it second
Hydraulic fluid port is oil return opening, and now electronic control unit, which sends electric signal, makes the first automatic brake valve 6 be in maximum Opening pressure state,
Second automatic brake valve 10 is in minimum Opening pressure state, and the valve port of the first stop valve 4 is closed, and the valve port of the second stop valve 12 is complete
Open, hydraulic oil is pumped out from the hydraulic fluid port of hydraulic pump 1 first, by the first oil-feed logical valve 3, into the first hydraulic fluid port of hydraulic motor 8,
Hydraulic oil is discharged from the second hydraulic fluid port of hydraulic motor 8, into the second stop valve 12, now because the second automatic brake valve 10 is opened
Pressure is zero, and the valve port standard-sized sheet of the second stop valve 12, hydraulic oil passes through the second stop valve 12, the hydraulic return of the second oil return stop valve 14
Second hydraulic fluid port of pump 1；
When the first hydraulic fluid port pressure value of hydraulic motor 8 is less than pressure preset, now electronic control unit judges occur
Exceed load phenomenon, gives the second automatic brake valve 10 setting electric signal, and the Opening pressure of the second stop valve 12, which becomes, turns to setting value,
Brake back pressure to set up, balance negative sense load force, it is to avoid the hypervelocity phenomenon under Exceed load, electronic control unit is according to the pressure of reception
Force value signal, sends control instruction PID regulations automatically, and closed-loop control adjusts the Opening pressure of the second automatic brake valve 10, so that
Further improve the braking ability of system；
When the first hydraulic fluid port pressure value of hydraulic motor 8 is more than pressure preset, now electronic control unit judges not go out
Existing Exceed load phenomenon, gives the Opening pressure of the second automatic brake valve 10 and keeps minimum value, second fully opens by 14 valves, this
When brake system pressure be zero；
When the second hydraulic fluid port of hydraulic pump 1 is oil discharge outlet, now the second hydraulic fluid port of hydraulic motor 8 is oil inlet, and it first
Hydraulic fluid port is oil return opening, and now electronic control unit, which sends electric signal, makes the second automatic brake valve 10 be in maximum Opening pressure shape
State, the first automatic brake valve 6 is in Opening pressure minimum state, and the valve port of the second stop valve 12 is closed, and the first stop valve 4 is opened completely
Open, hydraulic oil is pumped out from the oil discharge outlet of hydraulic pump 1, by the second oil-feed logical valve 14, into the second hydraulic fluid port of hydraulic motor 8, liquid
Press oil and discharged from the first hydraulic fluid port of hydraulic motor 8, into the first stop valve 4, now due to the Opening pressure of the first automatic brake valve 6
Be zero, the valve port standard-sized sheet of the first stop valve 4, hydraulic oil by the first stop valve 4, the rework solution press pump 1 of the first oil return stop valve 2
One hydraulic fluid port；
When the second hydraulic fluid port pressure value of hydraulic motor 8 is less than pressure preset, now electronic control unit judges occur
Exceed load phenomenon, gives the first automatic brake valve 6 setting electric signal, and the Opening pressure of the first stop valve 4, which becomes, turns to setting pressure
Value, braking back pressure is set up, and balances negative sense load force, it is to avoid the hypervelocity phenomenon under Exceed load, electronic control unit is according to reception
Pressure value signal, send automatically control instruction PID regulation, closed-loop control adjust the second automatic brake valve 10 Opening pressure,
So as to further improve the braking ability of system；
When the second hydraulic fluid port pressure value of hydraulic motor 8 is more than pressure preset, now electronic control unit judges not go out
Existing Exceed load phenomenon, gives the Opening pressure of the first automatic brake valve 6 and keeps minimum value, the first stop valve 4 is fully opened, now
Brake system pressure is zero.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (4)
1. a kind of braking control system applied to hydraulic closed drive system, it is characterised in that：The braking control system bag
Include hydraulic pump (1), Braking mode valve group (15) and hydraulic motor (8)；The Braking mode valve group (15) is control valve block, the valve
Block includes the first oil return logical valve (2), the second oil return logical valve (14), the first oil-feed logical valve (3), the second oil-feed logical valve
(13), the first stop valve (4), the second stop valve (12), the first safety valve (5) and the second safety valve (11), the first Braking mode
Valve (6) and the second automatic brake valve (10)；
First hydraulic fluid port of the hydraulic pump (1) and the oil inlet and the first oil return logical valve (2) of the first oil-feed logical valve (3)
Oil return opening be connected；Second hydraulic fluid port of the hydraulic pump (1) and the oil inlet and first of the second oil-feed logical valve (13)
The oil return opening of oil return logical valve (14) is connected；The hydraulic pump (1) provides oil pressure for the braking control system；
The oil return opening and the first stop valve (4) of first hydraulic fluid port of the hydraulic motor (8) and the first oil-feed logical valve (3)
Oil inlet is connected；Second hydraulic fluid port of the hydraulic motor (8) and the oil return opening and second of the second oil-feed logical valve (13)
The oil inlet of stop valve (12) is connected；
The oil inlet of first automatic brake valve (6) is connected with the oil inlet of first stop valve (4)；Described first certainly
The oil return opening of dynamic brake valve (6) and oil return opening, the oil-feed of the first oil return logical valve (2) of second automatic brake valve (10)
The oil return opening phase of mouth, the oil inlet of the second oil return logical valve (14), the oil return opening of the first safety valve (5) and the second safety valve (11)
Connection；
The oil inlet of second automatic brake valve (10) is connected with the oil inlet of second stop valve (12)；Described second
The oil return opening of automatic brake valve (10) and the oil return opening of first automatic brake valve (6), the oil-feed of the first oil return logical valve (2)
The oil return opening phase of mouth, the oil inlet of the second oil return logical valve (14), the oil return opening of the first safety valve (5) and the second safety valve (11)
Connection；
The oil inlet of first stop valve (4) and the oil return opening and the first automatic brake valve of the first oil-feed logical valve (3)
(6) oil inlet is connected；The oil return opening of the oil return opening of first stop valve (4) and second automatic brake valve (10),
The oil inlet of first oil return logical valve (2), the oil inlet of the second oil return logical valve (14), the oil return opening of the first safety valve (5) and
The oil return opening of second safety valve (11) is connected；
The oil inlet of second stop valve (12) and the oil return opening and the second Braking mode of the second oil-feed logical valve (13)
The oil inlet of valve (10) is connected；The oil return opening of second stop valve (12) and the oil return of first automatic brake valve (6)
Mouth, the oil inlet of the first oil return logical valve (2), the oil inlet of the second oil return logical valve (14), the oil return opening of the first safety valve (5)
It is connected with the oil return opening of the second safety valve (11)；
The oil return opening and hydraulic pump (1) of the oil inlet of the first oil-feed logical valve (3) and the first oil return logical valve (2)
First hydraulic fluid port is connected；The oil return opening of the first oil-feed logical valve (3) and the oil inlet and hydraulic pressure of first stop valve (4)
First hydraulic fluid port of motor (8) is connected；
The oil return opening and hydraulic pump (1) of the oil inlet of the second oil-feed logical valve (13) and the second oil return logical valve (1) 4
The second hydraulic fluid port be connected；The oil inlet of the oil return opening of the second oil-feed logical valve (13) and second stop valve (12) and
Second hydraulic fluid port of hydraulic motor (8) is connected；
The oil inlet of the first oil return logical valve (2) and oil inlet, the first safety valve of the second oil return logical valve (14)
(5) oil return opening and the oil return opening of the first automatic brake valve (6) is connected；The oil return opening of the first oil return logical valve (2) with
The oil inlet of the first oil-feed logical valve (3) is connected；
The oil inlet of the second oil return logical valve (14) and oil inlet, the second safety valve of the first oil return logical valve (2)
(11) oil return opening and the oil return opening of the second automatic brake valve (10) is connected；The oil return opening of the second oil return logical valve (14)
It is connected with the oil inlet of the second oil-feed logical valve (13)；
The oil inlet of the oil inlet of first safety valve (5) and first automatic brake valve (6), the first stop valve (4)
The oil return opening of oil inlet and the first oil-feed logical valve (3) is connected；The oil return opening of first safety valve (5) with described first section
Only the oil return opening of the oil return opening of valve (4) and the first automatic brake valve (6) is connected；
The oil inlet of second safety valve (11) and oil inlet, the second stop valve (12) of second automatic brake valve (10)
Oil inlet and the oil return opening of the second oil-feed logical valve (13) be connected；The oil return opening of first safety valve (5) and described the
The oil return opening of two stop valves (12) and the oil return opening of the second automatic brake valve (10) are connected.
2. the braking control system according to claim 1 applied to hydraulic closed drive system, it is characterised in that：It is described
Braking control system also includes electronic control unit, first pressure sensor (7) and second pressure sensor (9)；Described first
Pressure sensor (7) is connected on the pipeline of the hydraulic fluid port of hydraulic motor (8) first, and first for detecting hydraulic motor (8)
Hydraulic fluid port pressure value, it exports electric signal and is connected with electronic control unit input；The second pressure sensor (9) is connected to institute
On the pipeline for stating the hydraulic fluid port of hydraulic motor (8) second, for detecting hydraulic motor the second hydraulic fluid port pressure value, it exports electric signal and electricity
Sub-control unit input is connected；The electronic control unit is that vehicle often uses controller, and its input collection first pressure is passed
Sensor (7) and second pressure sensor (9) signal, carry out closed-loop control computing by internal processes and PID adjust computing, will
Operation result is converted into electric signal, the first Braking mode of control (6) and the second automatic brake valve (10).
3. the braking control system according to claim 1 or 2 applied to hydraulic closed drive system, it is characterised in that：
The hydraulic pump (1) is two-way closed variable pump, and the hydraulic motor (8) is bidirectional variable hydraulic motor, and described first is automatic
Brake valve (6) is electromagnetic proportion relief valve, the Opening pressure of adoption rate magnet control valve, second automatic brake valve
(10) it is electromagnetic proportion relief valve, the Opening pressure of adoption rate magnet control valve, first stop valve (4) is cover plate
Inserting stop valve, second stop valve (12) be cover plate inserting stop valve, the first oil-feed logical valve (3) be band
The inserting stop valve of cover plate, the second oil-feed logical valve (13) is the inserting stop valve of cover plate, the first oil return logic
Valve (2) is the inserting stop valve of cover plate, and the second oil return logical valve (14) is the inserting stop valve of cover plate, described first
Safety valve (5) is the inserting overflow valve of cover plate, and second safety valve (11) is the inserting overflow valve of cover plate.
4. the control method of the braking control system according to claim 1 applied to hydraulic closed drive system, it is special
Levy and be：This method content comprises the following steps：
Obtained respectively by first pressure sensor (7) and second pressure sensor (9) first the hydraulic fluid port of hydraulic motor (8) first and
The pressure value of second hydraulic fluid port；
When the first hydraulic fluid port of hydraulic pump (1) is oil discharge outlet, now the first hydraulic fluid port of hydraulic motor (8) is oil inlet, and it second
Hydraulic fluid port is oil return opening, and now electronic control unit, which sends electric signal, makes the first automatic brake valve (6) be in maximum Opening pressure shape
State, the second automatic brake valve (10) is in minimum Opening pressure state, and the first stop valve (4) valve port is closed, the second stop valve
(12) valve port is fully opened, and hydraulic oil is pumped out from the hydraulic fluid port of hydraulic pump (1) first, by the first oil-feed logical valve (3), into hydraulic pressure
First hydraulic fluid port of motor (8), hydraulic oil is discharged from the second hydraulic fluid port of hydraulic motor (8), into the second stop valve (12), now by
In the second automatic brake valve (10), Opening pressure is zero, and the second stop valve (12) valve port standard-sized sheet, hydraulic oil passes through the second stop valve
(12), the second hydraulic fluid port of the second oil return stop valve (14) rework solution press pump (1)；
When the first hydraulic fluid port pressure value of hydraulic motor (8) is less than pressure preset, now electronic control unit judges to surpass
More load phenomena, gives the second automatic brake valve (10) setting electric signal, and the second stop valve (12) Opening pressure, which becomes, turns to setting
Value, braking back pressure is set up, and balances negative sense load force, it is to avoid the hypervelocity phenomenon under Exceed load, electronic control unit is according to reception
Pressure value signal, send automatically control instruction PID regulation, closed-loop control adjust the second automatic brake valve (10) unlatching pressure
Power, so as to further improve the braking ability of system；
When the first hydraulic fluid port pressure value of hydraulic motor (8) is more than pressure preset, now electronic control unit judges do not occur
Exceed load phenomenon, gives the second automatic brake valve (10) Opening pressure and keeps minimum value, second fully opens by (14) valve,
Now brake system pressure is zero；
When the second hydraulic fluid port of hydraulic pump (1) is oil discharge outlet, now the second hydraulic fluid port of hydraulic motor (8) is oil inlet, and it first
Hydraulic fluid port is oil return opening, and now electronic control unit, which sends electric signal, makes the second automatic brake valve (10) be in maximum Opening pressure shape
State, the first automatic brake valve (6) is in Opening pressure minimum state, and the second stop valve (12) valve port is closed, the first stop valve (4)
Fully open, hydraulic oil is pumped out from hydraulic pump (1) oil discharge outlet, by the second oil-feed logical valve (14), into hydraulic motor (8)
Second hydraulic fluid port, hydraulic oil is discharged from the first hydraulic fluid port of hydraulic motor (8), into the first stop valve (4), now because first is automatic
Brake valve (6) Opening pressure is zero, and the first stop valve (4) valve port standard-sized sheet, hydraulic oil passes through the first stop valve (4), the first oil return
First hydraulic fluid port of stop valve (2) rework solution press pump (1)；
When the second hydraulic fluid port pressure value of hydraulic motor (8) is less than pressure preset, now electronic control unit judges to surpass
More load phenomena, gives the first automatic brake valve (6) setting electric signal, and the first stop valve (4) Opening pressure, which becomes, turns to setting pressure
Force value, braking back pressure is set up, and balances negative sense load force, it is to avoid the hypervelocity phenomenon under Exceed load, and electronic control unit is according to connecing
The pressure value signal of receipts, sends control instruction PID regulations automatically, and closed-loop control adjusts the unlatching pressure of the second automatic brake valve (10)
Power, so as to further improve the braking ability of system；
When the second hydraulic fluid port pressure value of hydraulic motor (8) is more than pressure preset, now electronic control unit judges do not occur
Exceed load phenomenon, gives the first automatic brake valve (6) Opening pressure and keeps minimum value, the first stop valve (4) is fully opened, this
When brake system pressure be zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710532361.4A CN107323446A (en) | 2017-06-30 | 2017-06-30 | Braking control system and its control method applied to hydraulic closed drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710532361.4A CN107323446A (en) | 2017-06-30 | 2017-06-30 | Braking control system and its control method applied to hydraulic closed drive system |
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| Publication Number | Publication Date |
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| CN107323446A true CN107323446A (en) | 2017-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710532361.4A Pending CN107323446A (en) | 2017-06-30 | 2017-06-30 | Braking control system and its control method applied to hydraulic closed drive system |
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| CN (1) | CN107323446A (en) |
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|---|---|---|---|---|
| JP2006240497A (en) * | 2005-03-03 | 2006-09-14 | Honda Motor Co Ltd | Vehicular brake device |
| CN102092377A (en) * | 2011-01-11 | 2011-06-15 | 谢陵波 | Active intrusive retarding system |
| CN103068643A (en) * | 2010-02-15 | 2013-04-24 | 罗伯特·博世有限公司 | Method for operating a brake boosted hydraulic braking system of a vehicle, and control device for a brake boosted hydraulic braking system of a vehicle |
| CN104085443A (en) * | 2014-08-06 | 2014-10-08 | 徐工集团工程机械股份有限公司 | Engineering machine mechanical braking and steering system with preferentially steering front wheels |
| CN204323314U (en) * | 2014-11-27 | 2015-05-13 | 中国煤炭科工集团太原研究院有限公司 | Bidirectional driving flame proof rubber tyre vehicle brake protecting system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006240497A (en) * | 2005-03-03 | 2006-09-14 | Honda Motor Co Ltd | Vehicular brake device |
| CN103068643A (en) * | 2010-02-15 | 2013-04-24 | 罗伯特·博世有限公司 | Method for operating a brake boosted hydraulic braking system of a vehicle, and control device for a brake boosted hydraulic braking system of a vehicle |
| CN102092377A (en) * | 2011-01-11 | 2011-06-15 | 谢陵波 | Active intrusive retarding system |
| CN104085443A (en) * | 2014-08-06 | 2014-10-08 | 徐工集团工程机械股份有限公司 | Engineering machine mechanical braking and steering system with preferentially steering front wheels |
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Application publication date: 20171107 |