CN107351824A - Braking method and system under vehicle sliding - Google Patents
Braking method and system under vehicle sliding Download PDFInfo
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- CN107351824A CN107351824A CN201710545449.XA CN201710545449A CN107351824A CN 107351824 A CN107351824 A CN 107351824A CN 201710545449 A CN201710545449 A CN 201710545449A CN 107351824 A CN107351824 A CN 107351824A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000013016 damping Methods 0.000 claims description 38
- 230000009467 reduction Effects 0.000 claims description 13
- 230000005611 electricity Effects 0.000 description 4
- 241000271559 Dromaiidae Species 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000010062 adhesion mechanism Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/1701—Braking or traction control means specially adapted for particular types of vehicles
- B60T8/1705—Braking or traction control means specially adapted for particular types of vehicles for rail vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/24—Electrodynamic brake systems for vehicles in general with additional mechanical or electromagnetic braking
- B60L7/26—Controlling the braking effect
-
- 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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/176—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
The present invention provides braking method and system under a kind of vehicle sliding.This method includes：Brak control unit calculates the reference velocity of vehicle and the axle deceleration of each axle according to the axle speed of each axle；Brak control unit is according to reference velocity and the difference of the axle speed of each axle, and the axle deceleration of each axle, it is determined that the current sliding state of each axle；The maximum that brak control unit reduces numerical value according to the corresponding electric braking of current sliding state of car speed, reference velocity, axle speed, the difference of reference velocity and the axle speed of each axle, each axle judges whether vehicle meets electric braking excision condition；If satisfied, brak control unit, which sends electric braking, cuts off signal to traction control unit；Traction control unit cuts off signal excision electric braking according to electric braking.The present invention can cut off vehicle electric braking in time when vehicle seriously slides, and avoid wheel to scratch accident.
Description
Technical field
The present invention relates to vehicle brake field, in particular it relates to braking method and system under a kind of vehicle sliding.
Background technology
Brak control unit (hereinafter referred to as BCU) and traction control unit (hereinafter referred to as TCU) slide detection function.
BCU control air dampings are anti-skidding, and auxiliary control electric braking is anti-skidding, and TCU control electric brakings are anti-skidding, and therefore, BCU and TCU both sides are only
Simple information exchange is carried out, does not influence respective anti-sliding control.
Current vehicle braking anti-sliding control technology is also grasped by foreign side.Because the control strategy of antiskid system is according to every
The achievement in research of individual national adhesion mechanism designs, suitable for state's wheel rail adhesion characteristic；And the railway in China uses ring
Border and wheel rail adhesion characteristic all have notable difference with foreign countries, cause existing EMU difference occur initial stage in introduction
The wheel of degree is to abrading accident, so in the prior art also without the excision vehicle electrical suitable for China's autonomy-oriented EMU
The method of braking.
The content of the invention
The main purpose of the embodiment of the present invention is to provide braking method and system under a kind of vehicle sliding, with vehicle
Vehicle electric braking is cut off in time when seriously sliding, and avoids wheel to scratch accident.
To achieve these goals, the embodiment of the present invention provides the braking method under a kind of vehicle sliding, including：
Brak control unit calculates the reference velocity of vehicle and the axle deceleration of each axle according to the axle speed of each axle；
Brak control unit is according to reference velocity and the difference of the axle speed of each axle, and each axle deceleration of axle,
It is determined that the current sliding state of each axle；
Brak control unit is according to car speed, reference velocity, axle speed, the difference of reference velocity and the axle speed of each axle
Value, each axle current sliding state corresponding to electric braking reduce numerical value maximum judge vehicle whether meet electric braking excision
Condition；
If satisfied, brak control unit, which sends electric braking, cuts off signal to traction control unit；
Traction control unit cuts off signal excision electric braking according to electric braking.
In wherein a kind of embodiment, when traction control unit is car control pattern, electric braking excision condition includes：
The maximum that electric braking reduces numerical value is higher than the first default value in the first preset time；Or,
The difference of car speed and reference velocity is higher than the second default value in the second preset time；Or,
The difference of reference velocity and the axle speed of the one of axle of vehicle is higher than the 3rd present count in the 3rd preset time
Value.
In wherein a kind of embodiment, when traction control unit is frame control pattern, electric braking excision condition includes：
The maximum that electric braking reduces numerical value is higher than the first default value in the first preset time；Or,
The difference of car speed and reference velocity is higher than the first default value in the second preset time；Or,
The difference of the axle speed of the one of axle of reference velocity bogie corresponding with current traction control unit is the 4th
It is higher than the 4th default value in preset time.
In wherein a kind of embodiment, brak control unit according to the difference of reference velocity and the axle speed of each axle, with
And the axle deceleration of each axle, it is determined that the current sliding state of each axle, is specifically included：
Brak control unit is according to reference velocity and the difference of the axle speed of each axle, and each axle deceleration of axle,
It is determined that the current sliding state of each axle.
In wherein a kind of embodiment, in addition to：
Brak control unit sends electric braking reduction signal to traction control unit, electric braking and reduces signal and include electric braking
Reduce the maximum of numerical value；
Traction control unit reduces the electric braking force of signal reduction vehicle according to electric braking.
In wherein a kind of embodiment, in addition to：
Brak control unit air damping according to corresponding to the current sliding state of each axle reduces each axle of time control
Antiskid valve to adjust the pressure of checking cylinder corresponding to each axle, reduce air damping power.
In wherein a kind of embodiment, brak control unit air damping according to corresponding to the current sliding state of each axle
The antiskid valve of each axle of time control is reduced, is specifically included：
Brak control unit air damping according to corresponding to the current sliding state of each axle reduces each axle of time control
Pressure retaining valve and exhaust valve.
The embodiment of the present invention also provides the brakes under a kind of vehicle sliding, including brak control unit and traction control
Unit；
Brak control unit includes：
Computing module, for calculating the reference velocity of vehicle and the axle deceleration of each axle according to the axle speed of each axle；
Sliding state module, the axle for the difference according to reference velocity and the axle speed of each axle, and each axle subtract
Speed, it is determined that the current sliding state of each axle；
Judge module, for according to car speed, reference velocity, axle speed, reference velocity and the axle speed of each axle
Difference, each axle current sliding state corresponding to electric braking reduce numerical value maximum judge whether vehicle meets that electric braking is cut
Except condition；
Sending module, signal is cut off to traction control unit for sending electric braking；
Traction control unit is used to cut off signal excision electric braking according to electric braking.
In wherein a kind of embodiment, sliding state module is specifically used for：
According to reference velocity and the difference of the axle speed of each axle, and each axle deceleration of axle, it is determined that each axle
Current sliding state.
In wherein a kind of embodiment, brak control unit is additionally operable to：Send electric braking and reduce signal to traction control list
Member, electric braking reduce signal and include the maximum that electric braking reduces numerical value；
Traction control unit is additionally operable to：The electric braking force of signal reduction vehicle is reduced according to electric braking.
In wherein a kind of embodiment, brak control unit also includes air damping and reduces module；
Air damping reduces module and is used for：Time control is reduced according to air damping corresponding to the current sliding state of each axle
The antiskid valve of each axle is made to adjust the pressure of checking cylinder corresponding to each axle, reduces air damping power.
In wherein a kind of embodiment, air damping reduces module and is specifically used for：
Pressure retaining valve and the row of each axle of time control are reduced according to air damping corresponding to the current sliding state of each axle
Air-valve.
Braking method and system under the vehicle sliding of the embodiment of the present invention, by the brak control unit of vehicle according to each
The axle speed of axle calculates the reference velocity of vehicle and the axle deceleration of each axle, and according to reference velocity and the axle speed of each axle
Difference, and the axle deceleration of each axle, it is determined that the current sliding state of each axle.The brak control unit of vehicle is further
Slided according to car speed, reference velocity, axle speed, reference velocity and the difference of the axle speed of each axle, the current of each axle
The maximum that electric braking corresponding to state reduces numerical value judges whether vehicle meets that electric braking cuts off condition, if satisfied, braking control
Unit processed sends electric braking and cuts off signal to traction control unit, and traction control unit is according to electric braking excision signal excision electricity system
It is dynamic.The present invention can cut off vehicle electric braking in time when vehicle seriously slides, and avoid wheel to scratch accident.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also be attached according to these
Figure obtains other accompanying drawings.
Fig. 1 is the flow chart of the braking method under vehicle sliding in the embodiment of the present invention；
Fig. 2 is the structured flowchart of the brakes under vehicle sliding in the embodiment of the present invention；
Fig. 3 is the structured flowchart of the brakes one of which embodiment under vehicle sliding in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
It is in view of real currently without the method for the excision vehicle electric braking suitable for China's autonomy-oriented EMU, the present invention
Apply example and braking method and system under a kind of vehicle sliding are provided, by the brak control unit of vehicle according to the axle speed of each axle
Calculate the reference velocity of vehicle and the axle deceleration of each axle, and according to the difference of reference velocity and the axle speed of each axle, with
And the axle deceleration of each axle, it is determined that the current sliding state of each axle.The brak control unit of vehicle is further according to vehicle
Speed, reference velocity, axle speed, the difference of reference velocity and the axle speed of each axle, the current sliding state of each axle are corresponding
Electric braking reduce numerical value maximum judge vehicle whether meet electric braking cut off condition, if satisfied, brak control unit hair
Power transmission braking excision signal to traction control unit, traction control unit cuts off signal excision electric braking according to electric braking.This hair
It is bright to cut off vehicle electric braking in time when vehicle seriously slides, wheel is avoided to scratch accident.
Below in conjunction with accompanying drawing, the present invention is described in detail.
Fig. 1 is the flow chart of the braking method under vehicle sliding in the embodiment of the present invention.As shown in figure 1, under vehicle sliding
Braking method include：
Step 101：Brak control unit calculates the reference velocity of vehicle and the axle of each axle according to the axle speed of each axle
Deceleration.
Step 102：Brak control unit is according to reference velocity and the difference of the axle speed of each axle, and the axle of each axle
Deceleration, it is determined that the current sliding state of each axle.
Step 103：Brak control unit is according to car speed, reference velocity, axle speed, reference velocity and the axle of each axle
The difference of speed, each axle current sliding state corresponding to electric braking reduce numerical value maximum judge whether vehicle meets electricity
Brake excision condition；
Step 104：Brak control unit sends electric braking and cuts off signal to traction control unit；
Step 105：Traction control unit cuts off signal excision electric braking according to electric braking.
Before step 101 is performed, the velocity sensor on each axle gathers the axle speed of each axle, and is sent out
Deliver to brak control unit (BCU).Train Control and management system (Train Control and Management System,
TCMS) collection vehicle speed and brak control unit is sent it to.
During electric braking, brak control unit judges the current sliding state of each axle especially by following manner：According to ginseng
The difference of speed and the axle speed of each axle, and the axle deceleration of each axle are examined, it is determined that the current sliding state of each axle.Tool
When body is implemented, it can be realized by matrix mapping table, for example, the difference of reference velocity and axle speed is divided into a1-aiCommon i
Individual grade, axle deceleration is divided into b1-bjCommon j grade, the sliding state matrix table of a shared i × j grade is formed,
Each grade corresponds with sliding state.For example, when the difference of reference velocity and axle speed is located at x-th of grade, axle subtracts
When speed is located at y-th of grade, sliding state now is the matrix table xth row, sliding state corresponding to y row.Wherein, car
Reference velocity be axle speed in maximum.
When traction control unit (TCU) is car control pattern, the electric braking excision condition in step 103 specifically includes：
The maximum that electric braking reduces numerical value is higher than the first default value in the first preset time；Or, car speed with
The difference of reference velocity is higher than the second default value in the second preset time；Or, reference velocity and the one of axle of vehicle
The difference of axle speed is higher than the 3rd default value in the 3rd preset time.
When traction control unit is frame control pattern, the electric braking excision condition in step 103 specifically includes：
The maximum that electric braking reduces numerical value is higher than the first default value in the first preset time；Or, car speed with
The difference of reference velocity is higher than the first default value in the second preset time；Or, reference velocity and current traction control unit
The difference of the axle speed of the corresponding one of axle of bogie is higher than the 4th default value in the 4th preset time.In frame control mould
In formula, a traction control unit controls two bogies, the corresponding brak control unit and two of each bogie respectively
Individual axle.In general, the axle speed of two axles on same bogie is of substantially equal.
In embodiment, when condition of being adhered between wheel track is poor, car wheel-set is produced when sliding, brak control unit can be used first
Empty electric composite braking, i.e., it is anti-skidding anti-skidding with electric braking to carry out air damping simultaneously, can suppress vehicle sliding, prevent car wheel-set from wiping
Wound, and make full use of adhesion to shorten the braking distance under the conditions of unfavorable adhesion.If brak control unit judges that wheel is tight
(meet the electric braking excision condition in step 103) when sliding again, illustrate that air damping is anti-skidding and electric braking is anti-skidding and almost do not have
Have effect.It is now abnormal (the now car of reference velocity calculating for the vehicle for avoiding traction electric machine coupling in parallel from bringing
Reference velocity be not maximum in axle speed) and wheel to scratch, brak control unit sends electric braking excision signal extremely
Traction control unit, after the electric braking that traction control unit receives cuts off signal, cut off electric braking.Meanwhile brak control unit
It is still anti-skidding using independent air damping after electric braking is cut off, to ensure anti-sliding control and train braking distance.
When electric braking is anti-skidding, brak control unit sends electric braking and reduces signal to traction control unit, electric braking reduction
Signal includes the maximum that electric braking reduces numerical value；Traction control unit reduces the electric braking of signal reduction vehicle according to electric braking
Power.For example, under frame control pattern, it is 10% that electric braking corresponding to an axle, which reduces numerical value, and electric braking corresponding to another axle subtracts
Minority value is 30%；Now, it is 30% that the electric braking that brak control unit is sent, which reduces numerical value, and traction control unit is made according to electricity
It is dynamic to reduce the 30% of the original electric braking force of signal reduction.
When air damping is anti-skidding, the control adhered again is slided using the method for adjustment brake-cylinder pressure.Embodiment
In, brak control unit air damping according to corresponding to the current sliding state of each axle reduces the anti-skidding of each axle of time control
Valve, to adjust the pressure of checking cylinder corresponding to each axle, reduce air damping power.It is different from electric braking, now according to reference to speed
The difference of axle speed and the axle deceleration of each axle of degree and each axle, determine the current sliding state of each axle of vehicle.Often
The current sliding state of individual axle is different, and the pressure regulation to each checking cylinder is also different.
Antiskid valve includes pressure retaining valve and exhaust valve.Brak control unit is empty according to corresponding to the current sliding state of each axle
Gas braking reduces the pressure retaining valve and exhaust valve of each axle of time control；Air damping reduces upper electricity of the time including pressure retaining valve and continued
Time and the upper electric duration of exhaust valve.
In embodiment, when vehicle meets that electric braking cuts off reset condition, brak control unit resets electric braking excision letter
Number.Electric braking excision reset condition includes：Vehicle sliding terminates；Or, this end of braking is (for example, release of brake or by braking
It is changed into drawing)；Or, vehicle stops.
Fig. 3 is the structured flowchart of the brakes one of which embodiment under vehicle sliding in the embodiment of the present invention.Such as Fig. 3
Shown, brak control unit reduces signal or electric braking by MVB (MVB) or rigid line to send electric braking
Signal is cut off to traction control unit.
The present invention is in the Chinese Industrial Standards (CIS) EMUs, long-traveller hybrid power EMUs, Tangshan 160km cities of 350 kilometers of speed per hour
Used in the vehicles such as border EMUs, existing car experiment and operation examination effect are good.Compares figure 3, specific implementation process of the invention
It is as follows：
1st, the axle speed for 4 axles that brak control unit gathers according to No. 4 velocity sensors, the reference velocity of vehicle is calculated
With the axle deceleration of 4 axles；Car speed is received from Train Control and management system.
2nd, brak control unit determines car according to reference velocity and 4 differences of 4 axle speeds, and 4 axle deceleration
The current sliding state of 4 axles, further determine that electric braking corresponding to the current sliding state of 4 axles reduces the maximum of numerical value
The air damping of value and 4 axles reduces the time.
3rd, brak control unit reduces numerical value to send by MVB or rigid line comprising the electric braking
The electric braking of maximum reduces signal, and traction control unit reduces the electric braking force of signal reduction vehicle according to electric braking；Meanwhile
The pressure retaining valve and exhaust valve of 4 axles of time control are reduced always according to air damping corresponding to the current sliding state of 4 axles, to adjust
The pressure of checking cylinder corresponding to 4 axles is saved, reduces air damping power.
4th, brak control unit is according to car speed, reference velocity, axle speed, reference velocity and the axle speed of each axle
The maximum that electric braking corresponding to difference, current sliding state reduces numerical value judges whether vehicle meets that electric braking cuts off condition；
If satisfied, sending electric braking by MVB or rigid line cuts off signal to traction control unit, traction control list
Member cuts off signal excision electric braking according to electric braking.
5th, when vehicle meets that electric braking cuts off reset condition, brak control unit resets electric braking excision signal.
Based on same inventive concept, the brakes under a kind of vehicle sliding is additionally provided in the embodiment of the present invention, due to
The principle that the system solves problem is similar to the braking method under vehicle sliding, therefore the implementation of the system may refer to method
Implement, repeat part and repeat no more.
Fig. 2 is the structured flowchart of the brakes under vehicle sliding in the embodiment of the present invention.As shown in Fig. 2 vehicle sliding
Under brakes can include：Brak control unit and traction control unit.
Brak control unit includes：
Computing module, for calculating the reference velocity of vehicle and the axle deceleration of each axle according to the axle speed of each axle；
Sliding state module, the axle for the difference according to reference velocity and the axle speed of each axle, and each axle subtract
Speed, it is determined that the current sliding state of each axle；
Judge module, for according to car speed, reference velocity, axle speed, reference velocity and the axle speed of each axle
Difference, each axle current sliding state corresponding to electric braking reduce numerical value maximum judge whether vehicle meets that electric braking is cut
Except condition；
Sending module, signal is cut off to traction control unit for sending electric braking；
Traction control unit is used to cut off signal excision electric braking according to electric braking.
In one particular embodiment of the present invention, sliding state module is specifically used for：
According in the maximum in the difference of reference velocity and the axle speed of each axle, and the axle deceleration of each axle
Maximum, it is determined that the current sliding state of each axle.
In one particular embodiment of the present invention, brak control unit is additionally operable to：Send electric braking and reduce signal to leading
Draw control unit, electric braking reduces signal and includes the maximum that electric braking reduces numerical value；
Traction control unit is additionally operable to：The electric braking force of signal reduction vehicle is reduced according to electric braking.
In one particular embodiment of the present invention, brak control unit also includes air damping reduction module；
Air damping reduces module and is used for：Time control is reduced according to air damping corresponding to the current sliding state of each axle
The antiskid valve of each axle is made to adjust the pressure of checking cylinder corresponding to each axle, reduces air damping power.
In one particular embodiment of the present invention, air damping reduces module and is specifically used for：
Pressure retaining valve and the row of each axle of time control are reduced according to air damping corresponding to the current sliding state of each axle
Air-valve.
To sum up, the braking method and system under the vehicle sliding of the embodiment of the present invention, by the brak control unit root of vehicle
The reference velocity of vehicle and the axle deceleration of each axle are calculated according to the axle speed of each axle, and according to reference velocity and each axle
The difference of axle speed, and the axle deceleration of each axle, it is determined that the current sliding state of each axle.The brak control unit of vehicle
Further worked as according to car speed, reference velocity, axle speed, the difference of the axle speed of reference velocity and each axle, each axle
The maximum that electric braking corresponding to preceding sliding state reduces numerical value judges whether vehicle meets that electric braking cuts off condition, if satisfied,
Brak control unit sends electric braking excision signal to traction control unit, traction control unit and cuts off signal according to electric braking and cut
Except electric braking.The present invention can cut off vehicle electric braking in time when vehicle seriously slides, and avoid wheel to scratch accident.
The present invention can also carry out that air damping is anti-skidding and electric braking is anti-skidding, to suppress vehicle sliding, prevent car wheel-set from wiping
Wound, and make full use of adhesion to shorten the braking distance under the conditions of unfavorable adhesion.
Particular embodiments described above, the purpose of the present invention, technical scheme and beneficial effect are carried out further in detail
Describe in detail it is bright, should be understood that the foregoing is only the present invention specific embodiment, the guarantor being not intended to limit the present invention
Scope is protected, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., should be included in this
Within the protection domain of invention.
Claims (12)
- A kind of 1. braking method under vehicle sliding, it is characterised in that including：Brak control unit calculates the reference velocity of vehicle and the axle deceleration of each axle according to the axle speed of each axle；The brak control unit is according to the reference velocity and the difference of the axle speed of each axle, and the axle of each axle Deceleration, it is determined that the current sliding state of each axle；The brak control unit is according to car speed, the reference velocity, the axle speed, the reference velocity and each axle The difference of axle speed, electric braking corresponding to the current sliding state of each axle reduces the maximum of numerical value and judges whether vehicle expires Sufficient electric braking cuts off condition；If satisfied, the brak control unit, which sends electric braking, cuts off signal to traction control unit；The traction control unit cuts off signal excision electric braking according to the electric braking.
- 2. the braking method under vehicle sliding according to claim 1, it is characterised in that when the traction control unit is During car control pattern, the electric braking excision condition includes：The maximum that the electric braking reduces numerical value is higher than the first default value in the first preset time；Or,The car speed and the difference of the reference velocity are higher than the second default value in the second preset time；Or,The difference of the reference velocity and the axle speed of the one of axle of vehicle is higher than the 3rd present count in the 3rd preset time Value.
- 3. the braking method under vehicle sliding according to claim 1, it is characterised in that when the traction control unit is During frame control pattern, the electric braking excision condition includes：The maximum that the electric braking reduces numerical value is higher than the first default value in the first preset time；Or,The car speed and the difference of the reference velocity are higher than the first default value in the second preset time；Or,The difference of the axle speed of the one of axle of reference velocity bogie corresponding with current traction control unit is the 4th It is higher than the 4th default value in preset time.
- 4. the braking method under vehicle sliding according to claim 1, it is characterised in that the brak control unit according to The difference of the reference velocity and the axle speed of each axle, and the axle deceleration of each axle, it is determined that each axle is current Sliding state, specifically include：The brak control unit slows down according to reference velocity and the difference of the axle speed of each axle, and the axle of each axle Degree, it is determined that the current sliding state of each axle.
- 5. the braking method under vehicle sliding according to claim 1, it is characterised in that also include：The brak control unit sends electric braking and reduces signal to the traction control unit, the electric braking reduction signal bag The maximum of numerical value is reduced containing the electric braking；The traction control unit reduces the electric braking force of the signal reduction vehicle according to the electric braking.
- 6. the braking method under vehicle sliding according to claim 1, it is characterised in that also include：Brak control unit air damping according to corresponding to the current sliding state of each axle reduces each axle of time control Antiskid valve to adjust the pressure of checking cylinder corresponding to each axle, reduce air damping power.
- 7. the braking method under vehicle sliding according to claim 6, it is characterised in that the brak control unit according to Air damping corresponding to the current sliding state of each axle reduces the antiskid valve of each axle of time control, specifically includes：Brak control unit air damping according to corresponding to the current sliding state of each axle reduces each axle of time control Pressure retaining valve and exhaust valve.
- 8. the brakes under a kind of vehicle sliding, it is characterised in that including brak control unit and traction control unit；The brak control unit includes：Computing module, for calculating the reference velocity of vehicle and the axle deceleration of each axle according to the axle speed of each axle；Sliding state module, for the difference according to the reference velocity and the axle speed of each axle, and each axle is described Axle deceleration, it is determined that the current sliding state of each axle；Judge module, for according to car speed, the reference velocity, the axle speed, the reference velocity and each axle The difference of axle speed, each axle current sliding state corresponding to electric braking reduce numerical value maximum judge whether vehicle meets Electric braking cuts off condition；Sending module, signal is cut off to the traction control unit for sending electric braking；The traction control unit is used to cut off signal excision electric braking according to the electric braking.
- 9. the brakes under vehicle sliding according to claim 8, it is characterised in thatThe sliding state module is specifically used for：According to reference velocity and the difference of the axle speed of each axle, and each axle deceleration of axle, it is determined that each axle Current sliding state.
- 10. the brakes under vehicle sliding according to claim 8, it is characterised in thatThe brak control unit is additionally operable to：Electric braking reduction signal to the traction control unit, the electric braking is sent to subtract Few signal includes the maximum that the electric braking reduces numerical value；The traction control unit is additionally operable to：The electric braking force of the signal reduction vehicle is reduced according to the electric braking.
- 11. the brakes under vehicle sliding according to claim 8, it is characterised in that the brak control unit is also Module is reduced including air damping；The air damping reduces module and is used for：Time control is reduced according to air damping corresponding to the current sliding state of each axle The antiskid valve of each axle is made to adjust the pressure of checking cylinder corresponding to each axle, reduces air damping power.
- 12. the brakes under vehicle sliding according to claim 11, it is characterised in that the air damping reduces mould Block is specifically used for：The pressure retaining valve and exhaust valve of each axle of time control are reduced according to air damping corresponding to the current sliding state of each axle.
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| CN201710545449.XA CN107351824B (en) | 2017-07-06 | 2017-07-06 | Braking method and system for vehicle under sliding |
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| CN111959468A (en) * | 2020-08-20 | 2020-11-20 | 南京中车浦镇海泰制动设备有限公司 | Electromechanical braking force control method for railway vehicle |
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