CN108001438A - A kind of method for exhausting of braking system of electric car - Google Patents
A kind of method for exhausting of braking system of electric car Download PDFInfo
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- CN108001438A CN108001438A CN201711148287.2A CN201711148287A CN108001438A CN 108001438 A CN108001438 A CN 108001438A CN 201711148287 A CN201711148287 A CN 201711148287A CN 108001438 A CN108001438 A CN 108001438A
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- test chamber
- pressure
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- solenoid valve
- liquid storage
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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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/002—Air treatment devices
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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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
- B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a kind of method for exhausting of braking system of electric car, brake pedal is first trampled, the air in brake circuit is gathered at bleed screw mounting hole, and the pressure of brake circuit is increased, vacuum pump is opened at this time, test chamber is vacuumized；Then the air that brake fluid is mixed with brake circuit is pumped into test chamber；Then the pressure plunger in test chamber is driven, is gradually increasing the pressure in test chamber；If the pressure of test chamber is more than or equal to setting value, illustrate that the brake fluid accounting in test chamber is higher, and then prove that the exhaust of brake circuit is abundant, vent sequence can be terminated at this time, the brake fluid in test chamber is then drawn into a liquid storage cylinder；It is on the contrary then repeat above procedure, until fully be vented untill.The achievable one man operation of the present invention, so as to improve efficiency, and can accurately control vent sequence, it is ensured that exhaust is thorough, avoids excessive exhaust.
Description
Technical field
The present invention relates to electric automobile manufacturing technology field, more particularly, to a kind of exhaust side of braking system of electric car
Method.
Background technology
The braking system of electric automobile, which is typically one, to be included before being full of the brake fluid pot of brake fluid, master cylinder, control
The preceding wheel cylinder of brake, the rear wheel cylinder for controlling rear brake, the fluid pressure governor for distributing brake fluid, be connected to
The closed system that the components such as the brake piping between a component are formed.During work, of a substantially incompressible brake fluid is being
Moved in the circuit of system, trample brake pedal, and acted on by the power-assisted of vacuum booster, make master cylinder promote brake fluid to exist
Movement in circuit, and then preceding wheel cylinder and the movement of rear wheel cylinder are promoted, forward and backward brake operation produces braking moment.
It is known that air has compressible characteristic, therefore, once there is air in braking system mixes the circuit system closed,
Air during braking in circuit can be compressed in advance, then could promote braking liquid movement, this will cause brake-pedal travel
Loss, so as to increase brake reaction time, and reduces the output of brake force, causes serious security risk.
For this reason, people are according to the situation of actual tests, the suitable position in the brake circuit of closing sets corresponding deflate
Screw.After repeatedly brake pedal is trampled, the air in circuit can progressively flow and gather the position led and set bleed screw, this
When can open bleed screw, you can outwards release and be mixed with the gas of brake fluid.
In the prior art, people in several ways can discharge the air in the loop of braking system,
The mode of most common of which is by two operating personnel's interoperations, is stepped on wherein a people ceaselessly tramples braking in driver's cabin
Plate, is set at bleed screw to be clustered together the air in circuit and to be moved to, and then makes brake pedal keep trampling
State, high pressure conditions are then kept in brake circuit, and the bleed screw in brake circuit under vehicle body is opened, braked back by another people
The air of brake fluid is mixed with road can discharge to form bubble.When visually observe emerge there is no bubble when, you can
Complete vent sequence.Although special device is not required in this method, but there are following defect：On the one hand two people are needed to coordinate
Operation, therefore its inefficiency；On the other hand, brake fluid has corrosivity, and therefore, the health of operating personnel can be caused
Detrimental effect.Particularly, this method requires operating personnel to have rich experience, and wants no-float between two people,
Otherwise exhaust is easily produced to be not thorough or the problem of excessive exhaust.
A kind of " exhaust apparatus of motor vehicle braking system " is disclosed in Chinese patent literature, its notification number is
CN203047242U, motor vehicle braking system include the brake wheel cylinder with fuel outlet；Exhaust apparatus includes transparent aspiration pump,
Hand control switch and exhaust tube are in series with the starting or stopping control circuit of the aspiration pump, which, which has, is connected to aspiration pump
Entrance side first end, and for being connected to the second end of fuel outlet.During exhaust, start aspiration pump, observe transparent
Situation in exhaust tube, if oneself illustrates that exhaust is completed, you can close aspiration pump through there is brake fluid outflow.
But above-mentioned exhaust apparatus still has following defect：First, it is vented by the exhaust apparatus or needs two people
Compounding practice, in other words, it needs to trample brake pedal repeatedly by a people, to arrive the air accumulation in brake circuit
At bleed screw, then the situation by another people observation exhaust tube.Secondly, operating personnel are difficult to accurate by the situation for observing exhaust tube
Really judge exhaust gas conditions, easily produce exhaust and be not thorough or the problem of excessive exhaust.
The content of the invention
The purpose of the present invention is to solve the effect present in a kind of existing method for exhausting of braking system of electric car
Rate is low, the problem of being difficult to accurately control, there is provided a kind of method for exhausting of braking system of electric car, it can be achieved that one man operation, from
And efficiency is improved, and can accurately control vent sequence, it is ensured that exhaust is thorough, avoids excessive exhaust.
To achieve these goals, the present invention uses following technical scheme：
A kind of method for exhausting of braking system of electric car, includes the following steps：
A. it is connected with one end of the exhaust tube equipped with the 3rd solenoid valve with a detection cylinder body with test chamber, exhaust tube
The connector of the other end is connected with the bleed screw mounting hole of braking system；
B. the bleeding point of a vacuum pump and the test chamber of detection cylinder body and the liquid storage that brake fluid can be stored are connected with pipeline
Chamber, and the first solenoid valve is set on the pipeline of connection vacuum pump and liquid storage cylinder, on connection vacuum pump and the pipeline of test chamber
Second solenoid valve is set, with liquid suction pipe connecting detection chamber and liquid storage cylinder, and the 4th solenoid valve is set on liquid suction pipe；
C. brake pedal is first trampled repeatedly, the air in brake circuit is gathered at the bleed screw mounting hole of brake circuit,
Then be continuously stepping on brake pedal, be gradually increasing the pressure of brake circuit, be arranged at this time the 3rd solenoid valve and connector it
Between exhaust tube on hydrostatic sensor to control device export a signal；
D. when the pressure of brake circuit is more than or equal to 3 megapascal, control device opens second solenoid valve, and opens vacuum pump, will
Test chamber in detection cylinder body vacuumizes, and then turns off second solenoid valve；
E. control device opens the 3rd solenoid valve, and the air that brake fluid is mixed with brake circuit is entered by exhaust tube
In test chamber；
F. control device closes the 3rd solenoid valve, then starts a driving device, to promote the pressurization of one end in test chamber
Plunger moves, so that the pressure that the air of brake fluid is mixed with test chamber is gradually increasing, the liquid being arranged on detection cylinder body
Pressure sensor then exports the pressure signal in test chamber to control device；
G. when driving device drives pressure plunger to be moved into place, the maximum pressure signal value in control device record test chamber
P, then control device open the 4th solenoid valve and the first solenoid valve, vacuum pump makes to form negative pressure in liquid storage cylinder, so that negative
Form pressure differential between the liquid storage cylinder of pressure and the test chamber of high pressure, the brake fluid in test chamber flows into liquid storage cylinder by liquid suction pipe
It is interior；
H. control device is by the maximum pressure signal value P and setting value P that prestores0It is compared and judges, if this
When P be more than or equal to P0, then vent sequence is terminated；If this P is less than P0, then repeat step c to step g.
The method for exhausting of the present invention first passes through tramples brake pedal repeatedly, and the air in brake circuit is gathered deflation spiral shell
At nail, then test chamber is set to form negative pressure by vacuum pump, so as to by the air at bleed screw and a small amount of brake fluid one
Rise and be drawn into test chamber, then pressed by the fixed range movement of pressure plunger to the gas-liquid mixture in test chamber, so that
The gas-liquid ratio in test chamber can be judged by the pressure rising situation to test chamber, and then confirms the air in brake circuit
Whether be fully drained, you can realize people's high-efficiency exhaust, while can accurate judgement exhaust effect, avoid exhaust deficiency or
Exhaust is excessive.
Preferably, the driving device includes the outer tube being connected with pressure plunger, connected in outer tube internal thread
There is driving screw rod, one end of the driving screw rod stretching outer tube and the output shaft of motor are coaxially connected, the motor and control
Device is electrically connected, and the lateral wall of the outer tube is equipped with axial limit card slot, and the end of the detection cylinder body is equipped with screens
Limit protrusion in limit card slot is, it is necessary to when starting driving device, and control device starts motor, and motor drives driving screw rod to turn
It is dynamic, moved axially so as to drive with the outer tube that it is threadedly coupled, and then drive pressure plunger to be moved in test chamber.
Motor works so as to drive drive screw turns, can not be rotated since outer tube is subject to the spacing of limit protrusion,
Therefore driving screw rod can drive the outer tube being threadedly coupled with it to move back and forth vertically, and then drive pressure plunger movement.
Preferably, liquid storage cylinder top vertical be equipped with and stretch into the liquid back pipe of liquid storage cylinder bottom, the liquid suction pipe
One end is connected to detection cylinder body and is connected away from pressure plunger one end, the other end of liquid suction pipe with the upper end of liquid back pipe, the pumping
Tracheae is connected on the side wall of detection cylinder body, and the position sensor for being used for detecting pressure plunger position is equipped with detection cylinder body,
And it is as follows to increase step in step g：Control device makes pressure plunger be moved in test chamber close to pumping by driving device
Liquid pipe one end, the brake fluid for making to be mixed with air in test chamber are flowed into liquid storage cylinder, and position sensor is defeated to control device at this time
Go out a position signal, control device resets pressure plunger reverse movement by driving device.
The present invention sets the liquid back pipe plugged to bottom in liquid storage cylinder, in this way, when vacuum pump makes liquid storage cylinder form negative pressure
When, it can avoid being pumped out by vacuum from the brake fluid that liquid suction pipe enters in liquid storage cylinder.And entered by liquid back pipe in liquid storage cylinder
The upside that air in brake fluid and air mixture can be rapidly discharged under the action of liquid storage cylinder negative pressure in liquid storage cylinder is empty
Between, so as to fulfill good gas-liquid separation.Particularly, when brake fluid of the present invention in by test chamber is drawn into liquid storage cylinder,
Driving device can be made to drive pressure plunger mobile to push brake fluid, so as to can ensure that the braking in test chamber by control device
Liquid is completely transferred in liquid storage cylinder.
Therefore, the present invention has the advantages that：One man operation can be achieved, so as to improve efficiency, and can accurately control
Vent sequence processed, it is ensured that exhaust is thorough, avoids excessive exhaust.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of the exhaust apparatus of the present invention.
In figure：1st, vacuum pump 2, liquid storage cylinder 21, liquid back pipe 3, detection cylinder body 31, test chamber 32, pressure plunger 33,
Limit protrusion 40, the first solenoid valve 41, second solenoid valve 42, the 3rd solenoid valve 43, the 4th solenoid valve 5, motor 51, drive
Dynamic screw rod 52, outer tube 521, limit card slot 6, exhaust tube 61, connector 7, liquid suction pipe.
Embodiment
The present invention will be further described with embodiment below in conjunction with the accompanying drawings.
A kind of method for exhausting of braking system of electric car, using exhaust apparatus as shown in Figure 1, which includes
Control device with logic controller, vacuum pump 1, the detection cylinder body 3 of liquid storage cylinder 2 and bar shape, detect has in cylinder body
The test chamber 31 of cylindrical shape, a bleeding point of vacuum pump are connected by pipeline with liquid storage cylinder, another pumping of vacuum pump
Gas port is connected by pipeline with the side for the test chamber for detecting cylinder body.The is set on the pipeline of connection vacuum pump and liquid storage cylinder
One solenoid valve 40, to control the break-make of the pipeline；Second solenoid valve 41 is set on connection vacuum pump and the pipeline of test chamber, with
Control the break-make of the pipeline.
In addition, setting a pressure plunger 32 in the test chamber of detection cylinder body one end, the pressure plunger and a driving fill
Put associated, the power source of the driving device is a motor 5, in order to which control device can be by controlling the motor control of driving device
Pressure plunger processed moves left and right.Detect the exhaust tube that other end side of the cylinder body away from pressure plunger sets a communication with detection chamber
6, the other end of exhaust tube then sets a connector 61 that can be connected with the bleed screw mounting hole of braking system, and is taking out
3rd solenoid valve 42 of controllable break-make is set on tracheae.
In addition, liquid storage cylinder is connected with test chamber by a liquid suction pipe 7, and controllable break-make is set on liquid suction pipe
4th solenoid valve 43.Certainly, we need to also set the hydraulic pressure that can sense internal pressure to pass respectively on exhaust tube and test chamber
Sensor, control device and vacuum pump, the motor of driving device and first, second, third, fourth solenoid valve are electrically connected, and
One starting switch is set on control device.
The method for exhausting of braking system of electric car specifically comprises the following steps：
A. it is connected with one end of exhaust tube with a detection cylinder body, which is connected with the test chamber in detection cylinder body,
And the 3rd solenoid valve of controllable break-make is equipped with exhaust tube, by the connector of the exhaust tube other end and braking system
Bleed screw mounting hole is connected；
B. first bleeding point of a vacuum pump and the test chamber of detection cylinder body are connected with pipeline, while should with pipeline connection
Second bleeding point of vacuum pump and the liquid storage cylinder that brake fluid can be stored.Certainly, connecting the pipeline of liquid storage cylinder should preferably connect
On the top of liquid storage cylinder.First solenoid valve of controllable break-make is set on the pipeline of connection vacuum pump and liquid storage cylinder, is being connected
The second solenoid valve of controllable break-make is set on vacuum pump and the pipeline of test chamber.Liquid suction pipe connecting detection chamber and liquid storage are used again
Chamber, and the 4th solenoid valve that can control break-make is set on liquid suction pipe；
C. operating personnel first trample brake pedal repeatedly, make to be mixed in the air in the brake fluid of brake circuit and gradually gather system
At the bleed screw mounting hole in dynamic circuit, brake pedal is then continuously stepping on, the pressure of brake circuit is gradually increasing, sets at this time
First hydrostatic sensor put on the exhaust tube between the 3rd solenoid valve and connector exports a pressure to control device
Signal；
D. when the pressure of brake circuit is more than or equal to 3 megapascal, control device opens second solenoid valve and vacuum pump, vacuum pump
The test chamber detected in cylinder body is vacuumized, then turns off second solenoid valve, makes to keep vacuum state in test chamber.Certainly,
We can set corresponding vacuum transducer in test chamber, to export the vacuum signal of test chamber, consequently facilitating control dress
Put the closing for automatically controlling second solenoid valve exactly；
E. control device opens the 3rd solenoid valve, by brake circuit and the pressure differential of test chamber, is mixed with brake circuit
The air of brake fluid is entered in test chamber by exhaust tube, until being full of whole test chamber.Due to being mixed with the sky of brake fluid
When gas is full of whole test chamber, the pressure of test chamber and the pressure of brake circuit are consistent, and therefore, are arranged on detection cylinder at this time
Second hydrostatic sensor on body can export the pressure signal in a test chamber to control device, when the pressure signal with
When the pressure signal of first hydrostatic sensor is equal, control device is that can determine that the air for being mixed with brake fluid full of whole inspection
Survey chamber；
F. control device closes the 3rd solenoid valve, to make test chamber form a closed cavity, then starts a driving
Device, to promote the pressure plunger of one end in test chamber to move, so that being mixed with the pressure of the air of brake fluid in test chamber
It is gradually increasing, is arranged on pressure signal of the hydrostatic sensor on detection cylinder body then into control device output test chamber.To have
Beneficial to the movement for easily controlling pressure plunger, driving device includes a motor 5 being electrically connected with control device, and motor is preferred
Ground can use stepper motor, the coaxially connected driving screw rod 51 of output shaft of motor, the one end of pressure plunger away from exhaust tube
Then it is connected with an outer tube 52, the end of the protruding detection cylinder body of outer tube, driving screw flight is connected in outer tube.
In this way, when motor drives drive screw turns, you can drive moves back and forth vertically with the outer tube that it is threadedly coupled, and then
Drive pressure plunger movement.It should be noted that axial limit card slot 521 can be set on the lateral wall of outer tube, correspondingly,
Limit protrusion 33 of the end set screens of cylinder body in limit card slot is detected, follows driving screw rod to turn together to avoid outer tube
It is dynamic；
G. when driving device drives pressure plunger to be moved into place, the maximum pressure signal value in control device record test chamber
P, then control device open the 4th solenoid valve and the first solenoid valve, vacuum pump makes to form negative pressure in liquid storage cylinder, so that negative
Form pressure differential between the liquid storage cylinder of pressure and the test chamber of high pressure, the brake fluid in test chamber flows into liquid storage cylinder by liquid suction pipe
It is interior.In order to avoid the brake fluid in liquid storage cylinder is siphoned away by vacuum pump, we can liquid storage cylinder top vertical set one to stretch
Enter the liquid back pipe 21 of liquid storage cylinder bottom, one end of liquid suction pipe is connected to detection cylinder body away from pressure plunger one end, liquid suction pipe it is another
One end is connected with the upper end of liquid back pipe, and exhaust tube is then connected on the side wall of detection cylinder body, connects the pipeline of vacuum pump then
It is connected to the top of liquid storage cylinder.In this way, when vacuum pump work and when being connected with liquid storage cylinder, the air on liquid storage cylinder top be extracted and
Form negative pressure, the brake fluid in test chamber enters the bottom of liquid storage cylinder together with air, air therein form bubble and by
Step rises and is discharged into liquid storage cylinder upper space, and brake fluid then remains in the lower part of liquid storage cylinder, so as to fulfill good gas-liquid
Separation.
H. control device is by the maximum pressure signal value P and setting value P that prestores0It is compared and judges, such as
P is more than or equal to P to fruit at this time0, then vent sequence is terminated；If this P is less than P0, then repeat step c to step g.
It should be noted that setting value P0It can be drawn by experiment.Specifically, we can first set the detection of appropriate volume
Chamber, and the air that brake fluid is mixed with brake circuit is drawn into test chamber, by manually observing, it is ensured that finally extract out
Only brake fluid, that is to say, that the air in brake circuit has been discharged at this time.If what is be extracted at this time is not system entirely
Hydrodynamic, then correspondingly move the volume that pressure plunger one increases test chamber, then proceed to be evacuated, until manually observing what is extracted
Only brake fluid position.Pressure plunger a certain distance is then moved on, so that the orthobaric volume of test chamber is set, to make
Test chamber, which is once evacuated, can ensure that all gas are fully drained in brake circuit.Then noted into the test chamber of orthobaric volume
Enter compressed air, until the pressure in test chamber is equal with the pressure of brake circuit.It is fixed that pressure plunger one is moved at this time
Distance, is gradually increasing the pressure in test chamber, and hydrostatic sensor may be output to a maximum pressure signal value.When we are right
After the brake circuit of more electric automobiles repeats above-mentioned test, you can multiple maximum pressure signal values are obtained, and it is minimum
A maximum pressure signal value can be used as the present invention setting value P0.In this way, one when pressure plunger movement equally is solid
After set a distance, as long as the maximum pressure signal value P of test chamber is more than or equal to setting value P0, you can ensure the air in brake circuit
It is fully drained.
In addition, in order to ensure the brake fluid in test chamber is drawn into liquid storage cylinder completely, we can be on detection cylinder body
The position sensor for being used for detecting pressure plunger position is set, it is preferable that we can be in one position of end set of detection cylinder body
Sensor is put, corresponding shake-up block is set on the outer tube for stretching out detection cylinder body.In this way, step can be increased such as in step g
Under：Control device makes pressure plunger be moved in test chamber close to liquid suction pipe one end by driving device, makes mixing in test chamber
The brake fluid for having air is flowed into liquid storage cylinder, touches block trigger position sensor at this time, position sensor can be to control device
A position signal is exported, control device rotates backward the motor of driving device, you can reset pressure plunger reverse movement.
Claims (3)
1. a kind of method for exhausting of braking system of electric car, it is characterized in that, include the following steps：
A. it is connected with one end of the exhaust tube equipped with the 3rd solenoid valve with a detection cylinder body with test chamber, exhaust tube
The connector of the other end is connected with the bleed screw mounting hole of braking system；
B. the bleeding point of a vacuum pump and the test chamber of detection cylinder body and the liquid storage that brake fluid can be stored are connected with pipeline
Chamber, and the first solenoid valve is set on the pipeline of connection vacuum pump and liquid storage cylinder, on connection vacuum pump and the pipeline of test chamber
Second solenoid valve is set, with liquid suction pipe connecting detection chamber and liquid storage cylinder, and the 4th solenoid valve is set on liquid suction pipe；
C. brake pedal is first trampled repeatedly, the air in brake circuit is gathered at the bleed screw mounting hole of brake circuit,
Then be continuously stepping on brake pedal, be gradually increasing the pressure of brake circuit, be arranged at this time the 3rd solenoid valve and connector it
Between exhaust tube on hydrostatic sensor to control device export a signal；
D. when the pressure of brake circuit is more than or equal to 3 megapascal, control device opens second solenoid valve, and opens vacuum pump, will
Test chamber in detection cylinder body vacuumizes, and then turns off second solenoid valve；
E. control device opens the 3rd solenoid valve, and the air that brake fluid is mixed with brake circuit is entered by exhaust tube
In test chamber；
F. control device closes the 3rd solenoid valve, then starts a driving device, to promote the pressurization of one end in test chamber
Plunger moves, so that the pressure that the air of brake fluid is mixed with test chamber is gradually increasing, the liquid being arranged on detection cylinder body
Pressure sensor then exports the pressure signal in test chamber to control device；
G. when driving device drives pressure plunger to be moved into place, the maximum pressure signal value in control device record test chamber
P, then control device open the 4th solenoid valve and the first solenoid valve, vacuum pump makes to form negative pressure in liquid storage cylinder, so that negative
Form pressure differential between the liquid storage cylinder of pressure and the test chamber of high pressure, the brake fluid in test chamber flows into liquid storage cylinder by liquid suction pipe
It is interior；
H. control device is by the maximum pressure signal value P and setting value P that prestores0It is compared and judges, if this
When P be more than or equal to P0, then vent sequence is terminated；If this P is less than P0, then repeat step c to step g.
2. a kind of method for exhausting of braking system of electric car according to claim 3, it is characterized in that, the driving device
Including the outer tube being connected with pressure plunger, driving screw rod is connected with outer tube internal thread, the driving screw rod stretches out outer
One end of casing and the output shaft of motor are coaxially connected, and the motor is electrically connected with control device, the lateral wall of the outer tube
Axial limit card slot is equipped with, the end of the detection cylinder body is equipped with limit protrusion of the screens in limit card slot, it is necessary to open
During dynamic driving device, control device starts motor, and motor drives drive screw turns, so as to drive the overcoat being threadedly coupled with it
Pipe moves axially, and then drives pressure plunger to be moved in test chamber.
3. a kind of method for exhausting of braking system of electric car according to claim 1, it is characterized in that, on the top of liquid storage cylinder
Portion is vertically equipped with the liquid back pipe for stretching into liquid storage cylinder bottom, and one end of the liquid suction pipe is connected to detection cylinder body away from pressure plunger
One end, the other end of liquid suction pipe are connected with the upper end of liquid back pipe, and the exhaust tube is connected on the side wall of detection cylinder body, is being examined
Survey cylinder body and be equipped with the position sensor for being used for detecting pressure plunger position, and increase step is as follows in step g：Control dress
Put makes pressure plunger be moved in test chamber close to liquid suction pipe one end by driving device, makes the system that air is mixed with test chamber
Hydrodynamic is flowed into liquid storage cylinder, and position sensor exports a position signal to control device at this time, and control device is filled by driving
Putting resets pressure plunger reverse movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711148287.2A CN108001438B (en) | 2017-11-17 | 2017-11-17 | A kind of method for exhausting of braking system of electric car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711148287.2A CN108001438B (en) | 2017-11-17 | 2017-11-17 | A kind of method for exhausting of braking system of electric car |
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| CN108001438A true CN108001438A (en) | 2018-05-08 |
| CN108001438B CN108001438B (en) | 2019-08-23 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108973972A (en) * | 2018-06-11 | 2018-12-11 | 浙江国自机器人技术有限公司 | A kind of brake fluid method for implanting, system and the associated component of drum type braking device |
| CN109911833A (en) * | 2018-11-12 | 2019-06-21 | 中航通飞研究院有限公司 | A kind of passive brake system method for exhausting of aircraft |
| CN112248993A (en) * | 2020-09-30 | 2021-01-22 | 北汽福田汽车股份有限公司 | Exhaust device of hydraulic braking system, hydraulic braking system and vehicle |
| CN112477838A (en) * | 2020-12-01 | 2021-03-12 | 东风汽车集团有限公司 | Brake system exhaust checking system and method |
| CN112477836A (en) * | 2020-11-27 | 2021-03-12 | 东风汽车集团有限公司 | Brake system liquid feeding and exhausting control method based on electronic stability control system |
| AU2021257908B2 (en) * | 2020-10-30 | 2023-08-03 | Westinghouse Air Brake Technologies Corporation | Vehicle braking calibration system |
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